MassMutual
                                                         Participation Investors


                                                                  Report for the
                                            Nine Months Ended September 30, 2009














                                                                          [LOGO]

ADVISER
Babson Capital Management LLC
1500 Main Street, P.O. Box 15189
Springfield, Massachusetts 01115-5189

INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
KPMG LLP
Boston, Massachusetts 02110

COUNSEL TO THE TRUST
Ropes & Gray LLP
Boston, Massachusetts 02110

CUSTODIAN
Citibank, N.A.
New York, New York 10043

TRANSFER AGENT & REGISTRAR
Shareholder Financial Services, Inc.
P.O. Box 173673
Denver, Colorado 80217-3673
1-800-647-7374

INTERNET WEBSITE
www.babsoncapital.com/mpv

           MassMutual Participation Investors
           c/o Babson Capital Management LLC
[LOGO]     1500 Main Street, Suite 2200
           Springfield, Massachusetts 01115
           (413) 226-1516

--------------------------------------------------------------------------------
INVESTMENT OBJECTIVE AND POLICY

MassMutual Participation Investors (the "Trust") is a closed-end management
investment company, first offered to the public in 1988, whose shares are traded
on the New York Stock Exchange under the trading symbol "MPV". The Trust's share
price can be found in the financial section of most newspapers as "MassPrt" or
"MassMuPrt" under the New York Stock Exchange listings or Closed-End Fund
Listings.

The Trust's investment objective is to maximize total return by providing a high
level of current income, the potential for growth of income, and capital
appreciation. The Trust's principal investments are privately placed,
below-investment grade, long-term debt obligations purchased directly from their
issuers, which tend to be smaller companies. At least half of these investments
normally include equity features such as common stock, warrants, conversion
rights, or other equity features that provide the Trust with the opportunity to
realize capital gains. The Trust will also invest in publicly traded debt
securities (including high yield securities), again with an emphasis on those
with equity features, and in convertible preferred stocks and, subject to
certain limitations, readily marketable equity securities. Below-investment
grade or high yield securities have predominantly speculative characteristics
with respect to the capacity of the issuer to pay interest and repay principal.
In addition, the Trust may temporarily invest in high quality, readily
marketable securities.

Babson Capital Management LLC ("Babson Capital") manages the Trust on a total
return basis. The Trust distributes substantially all of its net income to
shareholders each year. Accordingly, the Trust pays dividends to shareholders in
January, May, August, and November. All registered shareholders are
automatically enrolled in the Dividend Reinvestment and Cash Purchase Plan
unless cash distributions are requested.

FORM N-Q

The Trust files its complete schedule of portfolio holdings with the U.S.
Securities and Exchange Commission ("SEC") for the first and third quarters of
each fiscal year on Form N-Q. This information is available (i) on the SEC's
website at http:// www.sec.gov; and (ii) at the SEC's Public Reference Room in
Washington, DC (which information on their operation may be obtained by calling
1-800-SEC-0330). A complete schedule of portfolio holdings as of each
quarter-end is available upon request by calling, toll-free, 866-399-1516.

PROXY VOTING POLICIES & Procedures; PROXY VOTING RECORD

The Trustees of the Trust have delegated proxy voting responsibilities relating
to the voting of securities held by the Trust to Babson Capital. A description
of Babson Capital's proxy voting policies and procedures is available (1)
without charge, upon request, by calling, toll-free 866-399-1516; (2) on the
Trust's website: http://www.babsoncapital.com/mpv; and (3) on the SEC's website
at http://www.sec.gov. Information regarding how the Trust voted proxies
relating to portfolio securities during the most recent 12-month period ended
June 30 is available (1) on the Trust's website: http://www.babsoncapital.
com/mpv; and (2) on the SEC's website at http://www.sec.gov.

                                                                             MPV
                                                                          Listed
                                                                            NYSE

                                              MassMutual Participation Investors

TO OUR SHAREHOLDERS

October 31, 2009

We are pleased to present the September 30, 2009 Quarterly Report of MassMutual
Participation Investors (the "Trust").

The Board of Trustees declared a quarterly dividend of 25 cents per share,
payable on November 13, 2009 to shareholders of record on October 26, 2009. The
Trust had previously paid a 25 cent per share dividend for the preceding
quarter.

During the third quarter, the net assets of the Trust increased to $111,833,864
or $11.22 per share compared to $109,871,490 or $11.05 per share on June 30,
2009. This translates into a 3.83% total return for the quarter, based on the
change in the Trust's net assets assuming the reinvestment of all dividends.
Longer term, the Trust returned -0.12%, 4.05%, 11.43%, and 11.56% for the 1-,
3-, 5- and 10-year time periods, respectively, based on the change in the
Trust's net assets assuming the reinvestment of all dividends. The Trust earned
24 cents per share of net investment income for the quarter, compared to 23
cents per share in the previous quarter.

The Trust's share price increased 2.1% during the third quarter, from $11.04 per
share to $11.27 per share. The Trust's market price of $11.27 per share equates
to a 0.4% premium over the September 30, 2009 net asset value per share of
$11.22. The Trust's average quarter-end premium for the 3, 5 and 10-year periods
was 2.9%, 6.5% and 5.0%, respectively. U.S. equity markets, as approximated by
the Russell 2000 Index, increased 19.28% for the quarter. U.S. high yield fixed
income markets, as approximated by the Barclays Capital U.S. Corporate High
Yield Index increased 14.22% for the quarter.

During the third quarter, banks and other senior debt providers finally began to
make more capital available to finance middle market buyout transactions. As a
result, the deal flow available to the Trust increased steadily as the quarter
progressed. The Trust closed two new private placement investments and two
"follow-on" investments in existing portfolio companies during the quarter. The
total amount invested by the Trust in these transactions was approximately $3.1
million. The two new investments were in International Offshore Services LLC and
Northwest Mailing Services, Inc., while the two follow-on investments were in
NetShape Technologies, Inc. and Telecorps Holdings, Inc. (A brief description of
these investments can be found in the Consolidated Schedule of Investments.) We
are pleased with the quality of the recent additions to the Trust's portfolio,
as new investments continue to be more conservatively structured and
attractively priced than has been the market norm for the past several years.
Transaction activity has remained fairly strong in the early part of the fourth
quarter, and our current backlog of deals bodes well for fourth quarter new
investment activity.

The weak economy continues to negatively impact the ability of many of our
existing portfolio companies to service their debt. We are spending considerable
time working closely with the transaction sponsors and the management teams of
these companies to remedy these situations. We expect these activities to
continue for the next several quarters. One of our portfolio companies, Radiac
Abrasives, Inc., was sold during the quarter with the Trust realizing a gain on
its investment. While realization activity has been slow during the first three
quarters of the year, there are signs that activity levels are increasing.

Thank you for your continued interest in and support of MassMutual Participation
Investors.

Sincerely,

/s/ Michael L. Klofas
Michael L. Klofas
President

--------------------------------------------------------------------------------
                      PORTFOLIO COMPOSITION AS OF 9/30/09 *

                            [PIE CHART APPEARS HERE]


PRIVATE / RESTRICTED                      PUBLIC EQUITY
EQUITY                                    0.5%
13.1%
                                          PRIVATE / 144A HIGH
CASH & SHORT TERM                         YIELD DEBT
INVESTMENTS                               69.8%
3.7%

PUBLIC HIGH YIELD
DEBT
12.9%


* Based on market value of total investments (including cash)
Cautionary Notice: Certain statements contained in this report may be "forward
looking" statements. Investors are cautioned not to place undue reliance on
forward-looking statements, which speak only as of the date on which they are
made and which reflect management's current estimates, projections, expectations
or beliefs, and which are subject to risks and uncertainties that may cause
actual results to differ materially. These statements are subject to change at
any time based upon economic, market or other conditions and may not be relied
upon as investment advice or an indication of the Trust's trading intent.
References to specific securities are not recommendations of such securities,
and may not be representative of the Trust's current or future investments. We
undertake no obligation to publicly update forward looking statements, whether
as a result of new information, future events, or otherwise.
--------------------------------------------------------------------------------
                                                                               1

CONSOLIDATED STATEMENT OF ASSETS AND LIABILITIES
SEPTEMBER 30, 2009
(UNAUDITED)

ASSETS:
Investments
  (See Consolidated Schedule of Investments)
Corporate restricted securities at fair value
  (Cost - $117,836,018)                                           $ 100,634,812
Corporate public securities at market value
  (Cost - $17,319,828)                                               16,192,116
                                                                  -------------
                                                                    116,826,928

Cash                                                                  4,493,817
Interest receivable                                                   3,017,325
Receivable for investments sold                                         152,137
Prepaid taxes                                                           150,000
Other assets                                                              6,273
                                                                  -------------
   TOTAL ASSETS                                                     124,646,480
                                                                  -------------

LIABILITIES:
Payable for investments purchased                                       132,742
Investment advisory fee payable                                         251,626
Note payable                                                         12,000,000
Interest payable                                                        262,933
Accrued expenses                                                        153,786
Other payables                                                           11,529
                                                                  -------------
   TOTAL LIABILITIES                                                 12,812,616
                                                                  -------------
   TOTAL NET ASSETS                                               $ 111,833,864
                                                                  =============


NET ASSETS:
Common shares, par value $.01 per share;
  an unlimited number authorized                                  $      99,644
Additional paid-in capital                                           92,963,768
Retained net realized gain on investments, prior years               32,871,737
Undistributed net investment income                                   4,219,476
Accumulated net realized gain on investments                              8,157
Net unrealized depreciation of investments                          (18,328,918)
                                                                  -------------
   TOTAL NET ASSETS                                               $ 111,833,864
                                                                  =============
COMMON SHARES ISSUED AND OUTSTANDING                                  9,964,376
                                                                  =============
NET ASSET VALUE PER SHARE                                         $       11.22
                                                                  =============



See Notes to Consolidated Financial Statements
--------------------------------------------------------------------------------
2

CONSOLIDATED STATEMENT OF OPERATIONS          MassMutual Participation Investors
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2009
(UNAUDITED)

INVESTMENT INCOME:
Interest                                                          $   9,051,041
Dividends                                                                   792
Other                                                                    19,781
                                                                  -------------
   TOTAL INVESTMENT INCOME                                            9,071,614
                                                                  -------------

EXPENSES:
Investment advisory fees                                                736,088
Interest                                                                522,000
Trustees' fees and expenses                                             124,313
Professional fees                                                       112,500
Reports to shareholders                                                  81,000
Custodian fees                                                           21,000
Transfer agent/registrar's expenses                                      18,000
Other                                                                    50,550
                                                                  -------------
   TOTAL EXPENSES                                                     1,665,451
                                                                  -------------
INVESTMENT INCOME - NET                                               7,406,163
                                                                  -------------

NET REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS:
Net realized gain on investments before taxes                           760,386
Income tax expense                                                       (7,087)
                                                                  -------------
Net realized gain on investments after taxes                            753,299
Net change in unrealized depreciation of investments                 (1,942,537)
                                                                  -------------
   NET LOSS ON INVESTMENTS                                           (1,189,238)
                                                                  -------------
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS              $   6,216,925
                                                                  =============


See Notes to Consolidated Financial Statements
--------------------------------------------------------------------------------
                                                                               3

CONSOLIDATED STATEMENT OF CASH FLOWS
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2009
(UNAUDITED)


NET INCREASE IN CASH:
Cash flows from operating activities:
  Purchases/Proceeds/Maturities from short-term portfolio
    securities, net                                               $   5,736,626
  Purchases of portfolio securities                                 (17,490,043)
  Proceeds from disposition of portfolio securities                  15,260,518
  Interest, dividends and other income received                       7,274,406
  Interest expense paid                                                (348,000)
  Operating expenses paid                                            (1,162,684)
  Income taxes paid                                                    (180,087)
                                                                  -------------
    NET CASH PROVIDED BY OPERATING ACTIVITIES                         9,090,736
                                                                  -------------

Cash flows from financing activities:
  Cash dividends paid from net investment income                     (7,450,175)
  Receipts for shares issued on reinvestment of dividends               409,373
                                                                  -------------
    NET CASH USED FOR FINANCING ACTIVITIES                           (7,040,802)
                                                                  -------------


NET INCREASE IN CASH                                                  2,049,934
Cash - beginning of year                                              2,443,883
                                                                  -------------
CASH - END OF PERIOD                                              $   4,493,817
                                                                  =============

RECONCILIATION OF NET INCREASE IN NET ASSETS TO NET
CASH PROVIDED BY OPERATING ACTIVITIES:

NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS              $   6,216,925
                                                                  -------------

  Decrease in investments                                             4,554,707
  Increase in interest and dividends receivable                      (1,476,597)
  Increase in receivable for investments sold                           (43,486)
  Increase in other assets                                               (6,273)
  Decrease in payable for investments purchased                        (280,034)
  Increase in investment advisory fee payable                             3,730
  Increase in interest payable                                          174,000
  Increase in accrued expenses                                            7,372
  Decrease in accrued taxes payable                                     (23,000)
  Decrease in other payables                                            (36,608)
                                                                  -------------
TOTAL ADJUSTMENTS TO NET ASSETS FROM OPERATIONS                       2,873,811
                                                                  -------------
NET CASH PROVIDED BY OPERATING ACTIVITIES                         $   9,090,736
                                                                  =============

See Notes to Consolidated Financial Statements
--------------------------------------------------------------------------------
4

CONSOLIDATED STATEMENTS                       MassMutual Participation Investors
OF CHANGES IN NET ASSETS



                                                                     For the nine
                                                                     months ended       For the
                                                                       09/30/09        year ended
                                                                      (Unaudited)       12/31/08
                                                                    -------------    -------------
                                                                               
INCREASE (DECREASE) IN NET ASSETS:
Operations:
  Investment income - net                                           $   7,406,163    $  10,671,937
  Net realized gain (loss) on investments                                 753,299       (1,165,028)
  Net change in unrealized depreciation of investments                 (1,942,537)     (16,888,301)
                                                                    -------------    -------------
  Net increase (decrease) in net assets resulting from operations       6,216,925       (7,381,392)

Increase from common shares issued on reinvestment of dividends
  Common shares issued (2009 - 37,133; 2008 - 65,632)                     409,373          847,131

Dividends to shareholders from:
  Net investment income (2009 - $0.50 per share;
                         2008 - $1.00 per share)                       (4,968,364)      (9,915,143)
                                                                    -------------    -------------


     TOTAL INCREASE (DECREASE) IN NET ASSETS                            1,657,934      (16,449,404)


NET ASSETS, BEGINNING OF YEAR                                         110,175,930      126,625,334
                                                                    -------------    -------------

NET ASSETS, END OF PERIOD/YEAR (including undistributed net
investment income of $4,219,476 and $1,781,677, respectively)       $ 111,833,864    $ 110,175,930
                                                                    =============    =============




See Notes to Consolidated Financial Statements
--------------------------------------------------------------------------------
                                                                               5

CONSOLIDATED SELECTED FINANCIAL HIGHLIGHTS
SELECTED DATA FOR EACH SHARE OF BENEFICIAL INTEREST OUTSTANDING:

                                              For the nine months                For the years ended December 31,
                                                ended 09/30/2009 -----------------------------------------------------------------
                                                   (Unaudited)      2008          2007          2006          2005          2004
                                                   ---------     ---------     ---------     ---------     ---------     ---------
                                                                                                       
Net asset value:
   Beginning of year                               $   11.10     $   12.84     $   12.90     $   12.21     $   11.13     $    9.84
                                                   ---------     ---------     ---------     ---------     ---------     ---------
Net investment income(a)                                0.74          1.08          1.23          1.10          0.99          1.00
Net realized and unrealized
  gain (loss) on investments                           (0.12)        (1.82)        (0.05)         0.77          1.09 (b)      1.36
                                                   ---------     ---------     ---------     ---------     ---------     ---------
Total from investment operations                        0.62         (0.74)         1.18          1.87          2.08          2.36
                                                   ---------     ---------     ---------     ---------     ---------     ---------
Dividends from net investment
  income to common shareholders                        (0.50)        (1.00)        (1.23)        (1.18)        (1.01)        (1.10)
Dividends from net realized gain
  on investments to common shareholders                   --            --         (0.02)        (0.01)           --            --
Increase from dividends reinvested                        --          0.00(c)       0.01          0.01          0.01          0.03
                                                   ---------     ---------     ---------     ---------     ---------     ---------
Total dividends                                        (0.50)        (1.00)        (1.24)        (1.18)        (1.00)        (1.07)
                                                   ---------     ---------     ---------     ---------     ---------     ---------
Net asset value: End of period/year                $   11.22     $   11.10     $   12.84     $   12.90     $   12.21     $   11.13
                                                   ---------     ---------     ---------     ---------     ---------     ---------
Per share market value:
   End of period/year                              $   11.27     $    9.05     $   13.18     $   14.70     $   14.05     $   13.31
                                                   =========     =========     =========     =========     =========     =========
Total investment return
   Net asset value(d)                                  5.79%        (6.01%)        9.95%        18.64%        22.51%        25.14%
   Market value                                       30.12%       (25.36%)       (1.30%)       16.81%        17.25%        25.77%
Net assets (in millions):
   End of period/year                              $  111.83     $  110.18     $  126.63     $  126.52     $  119.02     $  107.61
Ratio of operating expenses
  to average net assets                                1.40%(e)      1.33%         1.36%         1.17%         1.45%         1.63%
Ratio of interest expense
  to average net assets                                0.63%(e)      0.58%         0.56%         0.57%         0.80%         0.89%
Ratio of income tax expense
  to average net assets (f)                            0.01%(e)      0.00%         0.48%         2.68%         2.83%         0.16%
Ratio of total expenses before custodian fee
  reduction to average net assets (f)                  2.04%(e)      1.91%         2.40%         4.46%         5.12%         2.68%
Ratio of net expenses after custodian fee
  reduction to average net assets (f)                  2.04%(e)      1.91%         2.40%         4.42%         5.08%         2.68%
Ratio of net investment income
  to average net assets                                9.05%(e)      8.74%         9.32%         8.43%         8.45%         9.60%
Portfolio turnover                                       13%           32%           33%           34%           32%           51%

(a) Calculated using average shares.
(b) Amount includes $0.10 per share in litigation proceeds.
(c) Rounds to less than $0.01 per share.
(d) Net asset value return represents portfolio returns based on change in the Trust's net asset value assuming the reinvestment of
    all dividends and distributions which differs from the total investment return based on the Trust's market value due to the
    difference between the Trust's net asset value and the market value of its shares outstanding; past performance is no guarantee
    of future results.
(e) Annualized.
(f) As additional information, this ratio is included to reflect the taxes paid on retained long-term gains. These taxes paid are
    netted against realized capital gains in the Statement of Operations. The taxes paid are treated as deemed distributions and a
    credit for the taxes paid is passed on to shareholders.

Senior borrowings:
   Total principal amount (in millions)            $      12     $      12     $      12     $      12     $      12     $    22.5
   Asset coverage per $1,000
     of indebtedness                               $  10,319     $  10,181     $  11,552     $  11,543     $  10,918     $   5,783


See Notes to Consolidated Financial Statements
--------------------------------------------------------------------------------
6

                                              MassMutual Participation Investors
CONSOLIDATED SCHEDULE OF INVESTMENTS
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES - 90.13%:(A)                      Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
CORPORATE RESTRICTED SECURITIES - 89.99%: (A)
PRIVATE PLACEMENT INVESTMENTS - 85.66%
A H C HOLDING COMPANY, INC.
A designer and manufacturer of boilers and water heaters for the commercial sector.
15% Senior Subordinated Note due 2015                            $  1,302,382         11/21/07     $  1,274,945     $  1,328,430
Limited Partnership Interest (B)                                  12.26% int.         11/21/07          119,009          113,278
                                                                                                   ------------     ------------
                                                                                                      1,393,954        1,441,708
                                                                                                   ------------     ------------
A S A P INDUSTRIES LLC
A designer and manufacturer of components used on oil and natural gas wells.
12.5% Senior Subordinated Note due 2015                          $    600,667         12/31/08          521,754          618,687
Limited Liability Company Unit Class A-2 (B)                         677 uts.         12/31/08           74,333           70,616
Limited Liability Company Unit Class A-3 (B)                         608 uts.         12/31/08           66,899                6
                                                                                                   ------------     ------------
                                                                                                        662,986          689,309
                                                                                                   ------------     ------------
A T I ACQUISITION COMPANY
A for-profit post-secondary school serving students in Texas, Florida and Arizona.
12% Senior Subordinated Note due 2012                            $  1,125,000         04/08/04        1,125,000        1,125,000
Warrant, exercisable until 2012, to purchase
  preferred stock at $.01 per share (B)                                7 shs.         11/16/07             --             12,801
Warrant, exercisable until 2012, to purchase
  common stock at $.02 per share (B)                               1,230 shs.         04/08/04             --          1,519,992
                                                                                                   ------------     ------------
                                                                                                      1,125,000        2,657,793
                                                                                                   ------------     ------------
A W X HOLDINGS CORPORATION
A provider of aerial equipment rental, sales and repair services to non-residential construction and maintenance contractors
operating in the State of Indiana.
10.5% Senior Secured Term Note due 2014                          $    420,000         05/15/08          411,600          396,235
13% Senior Subordinated Note due 2015                            $    420,000         05/15/08          380,633          386,509
Common Stock (B)                                                  60,000 shs.         05/15/08           60,000             --
Warrant, exercisable until 2015, to purchase
  common stock at $.01 per share (B)                              21,099 shs.         05/15/08           35,654             --
                                                                                                   ------------     ------------
                                                                                                        887,887          782,744
                                                                                                   ------------     ------------
ADVANCED TECHNOLOGIES HOLDINGS
A provider of factory maintenance services to industrial companies.
15% Senior Subordinated Note due 2013                            $  1,138,368         12/27/07        1,115,662        1,161,136
Preferred Stock (B)                                                  546 shs.         12/27/07          270,000          250,018
                                                                                                   ------------     ------------
                                                                                                      1,385,662        1,411,154
                                                                                                   ------------     ------------

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                                                                                                                               7


CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES:(A)(Continued)                    Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
AERO HOLDINGS, INC.
A provider of geospatial services to corporate and government clients.
10.5% Senior Secured Term Note due 2014                          $    930,000         03/09/07     $    916,050     $    958,419
14% Senior Subordinated Note due 2015                            $    720,000         03/09/07          656,294          727,200
Common Stock (B)                                                 150,000 shs.         03/09/07          150,000          153,556
Warrant, exercisable until 2015, to purchase
  common stock at $.01 per share (B)                              37,780 shs.         03/09/07           63,730           38,676
                                                                                                   ------------     ------------
                                                                                                      1,786,074        1,877,851
                                                                                                   ------------     ------------
ALL CURRENT HOLDING COMPANY
A specialty re-seller of essential electrical parts and components primarily serving wholesale distributors.
12% Senior Subordinated Note due 2015                            $    603,697         09/26/08          552,444          615,475
Common Stock (B)                                                     713 shs.         09/26/08           71,303           70,507
Warrant, exercisable until 2018, to purchase
  common stock at $.01 per share (B)                                 507 shs.         09/26/08           46,584           50,136
                                                                                                   ------------     ------------
                                                                                                        670,331          736,118
                                                                                                   ------------     ------------
AMERICAN HOSPICE MANAGEMENT HOLDING LLC
A for-profit hospice care provider in the United States.
12% Senior Subordinated Note due 2013                            $  1,687,503                *        1,606,040        1,687,503
Preferred Class A Unit (B)                                         1,706 uts.               **          170,600          264,086
Preferred Class B Unit (B)                                           808 uts.         06/09/08           80,789           97,087
Common Class B Unit (B)                                           16,100 uts.         01/22/04                1            9,347
Common Class D Unit (B)                                            3,690 uts.         09/12/06             --              2,142
                                                                                                   ------------     ------------
                                                                                                      1,857,430        2,060,165
                                                                                                   ------------     ------------
APEX ANALYTIX HOLDING CORP.
A provider of audit recovery and fraud detection services and software to commercial and retail businesses in the U.S. and Europe.
12.5% Senior Subordinated Note due 2016                          $  1,012,500         04/28/09          835,326        1,042,875
Preferred Stock Series B (B)                                       1.623 shs.         04/28/09          162,269               16
Common Stock (B)                                                     723 shs.         04/28/09              723                7
                                                                                                   ------------     ------------
                                                                                                        998,318        1,042,898
                                                                                                   ------------     ------------
ARROW TRU-LINE HOLDINGS, INC.
A manufacturer of hardware for residential and commercial overhead garage doors in North America.
12% Senior Subordinated Note due 2012                            $    861,702         05/18/05          832,799          732,447
Common Stock (B)                                                     263 shs.         05/18/05          263,298             --
Warrant, exercisable until 2012, to purchase
  common stock at $.01 per share (B)                                  69 shs.         05/18/05           59,362             --
                                                                                                   ------------     ------------
                                                                                                      1,155,459          732,447
                                                                                                   ------------     ------------
*  01/22/04 and 06/09/08.
** 01/22/04 and 09/12/06.

--------------------------------------------------------------------------------------------------------------------------------
8


                                              MassMutual Participation Investors
CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES:(A)(Continued)                    Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
BRAVO SPORTS HOLDING CORPORATION
A designer and marketer of niche branded consumer products including canopies, trampolines, in-line skates, skateboards, and
urethane wheels.
12.5% Senior Subordinated Note due 2014                          $  1,207,902         06/30/06     $  1,148,853     $  1,171,382
Preferred Stock Class A (B)                                          465 shs.         06/30/06          141,946           46,302
Common Stock (B)                                                        1 sh.         06/30/06              152             --
Warrant, exercisable until 2014, to purchase
  common stock at $.01 per share (B)                                 164 shs.         06/30/06           48,760           16,273
                                                                                                   ------------     ------------
                                                                                                      1,339,711        1,233,957
                                                                                                   ------------     ------------
C D N T, INC.
A value-added converter and distributor of specialty pressure sensitive adhesives, foams, films, and foils.
10.5% Senior Secured Term Note due 2014                          $    429,070         08/07/08          420,489          402,875
12.5% Senior Subordinated Note due 2015                          $    429,070         08/07/08          391,509          389,153
Common Stock (B)                                                  41,860 shs.         08/07/08           41,860             --
Warrant, exercisable until 2018, to purchase
  common stock at $.01 per share (B)                              32,914 shs.         08/07/08           32,965             --
                                                                                                   ------------     ------------
                                                                                                        886,823          792,028
                                                                                                   ------------     ------------
CAPITAL SPECIALTY PLASTICS, INC.
A producer of desiccant strips used for packaging pharmaceutical products.
Common Stock (B)                                                      55 shs.                *              252          385,762
                                                                                                   ------------     ------------
CLOUGH, HARBOUR AND ASSOCIATES
An engineering service firm that is located in Albany, NY.
12.25% Senior Subordinated Note due 2015                         $  1,270,588         12/02/08        1,177,994        1,308,706
Preferred Stock (B)                                                  147 shs.         12/02/08          146,594          139,261
                                                                                                   ------------     ------------
                                                                                                      1,324,588        1,447,967
                                                                                                   ------------     ------------
COEUR, INC.
A producer of proprietary, disposable power injection syringes.
12% Senior Subordinated Note due 2016                            $    642,857         10/10/08          581,786          662,143
Common Stock (B)                                                     321 shs.         10/10/08           32,143           30,536
Warrant, exercisable until 2018, to purchase
  common stock at $.01 per share (B)                                 495 shs.         10/10/08           48,214                5
                                                                                                   ------------     ------------
                                                                                                        662,143          692,684
                                                                                                   ------------     ------------
CONNECTICUT ELECTRIC, INC.
A supplier and distributor of electrical products sold into the retail and wholesale markets.
12% Senior Subordinated Note due 2014 (D)                        $  1,267,387         01/12/07        1,182,283          633,694
Limited Liability Company Unit Class A (B)                        82,613 uts.         01/12/07           82,613             --
Limited Liability Company Unit Class C (B)                        59,756 uts.         01/12/07           59,756             --
                                                                                                   ------------     ------------
                                                                                                      1,324,652          633,694
                                                                                                   ------------     ------------
* 12/30/97 and 05/29/99.

--------------------------------------------------------------------------------------------------------------------------------
                                                                                                                               9


CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES:(A)(Continued)                    Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
CONNOR SPORT COURT INTERNATIONAL, INC.
A designer and manufacturer of outdoor and indoor synthetic sports flooring and other temporary flooring products.
Preferred Stock Series B-2 (B)                                     9,081 shs.         07/05/07     $    370,796     $    908,072
Preferred Stock Series C (B)                                       4,757 shs.         07/05/07          158,912          463,018
Common Stock (B)                                                     380 shs.         07/05/07                4                4
Limited Partnership Interest (B)                                   6.88% int.                *          103,135             --
                                                                                                   ------------     ------------
                                                                                                        632,847        1,371,094
                                                                                                   ------------     ------------
COREPHARMA LLC
A manufacturer of oral dose generic pharmaceuticals targeted at niche applications.
12% Senior Subordinated Note due 2013                            $  1,350,000         08/04/05        1,303,161        1,350,000
Warrant, exercisable until 2013, to purchase
  common stock at $.001 per share (B)                                 10 shs.         08/04/05           72,617           95,669
                                                                                                   ------------     ------------
                                                                                                      1,375,778        1,445,669
                                                                                                   ------------     ------------
CRANE RENTAL CORPORATION
A crane rental company.
13% Senior Subordinated Note due 2015                            $  1,215,000         08/21/08        1,098,420        1,239,300
Common Stock (B)                                                 135,000 shs.         08/21/08          135,000           96,760
Warrant, exercisable until 2016, to purchase
  common stock at $.01 per share (B)                              72,037 shs.         08/21/08          103,143           51,632
                                                                                                   ------------     ------------
                                                                                                      1,336,563        1,387,692
                                                                                                   ------------     ------------
DAVIS-STANDARD LLC
A manufacturer, assembler, and installer of a broad range of capital equipment that is used in the extrusion, conversion, and
processing of plastic materials.
12% Senior Subordinated Note due 2014                            $    978,261         10/30/06          926,681          984,484
Limited Partnership Interest (B)                                   0.97% int.         10/30/06          371,739          550,433
Warrant, exercisable until 2014, to purchase
  preferred stock at $.01 per share (B)                               26 shs.         10/30/06           26,380           34,493
Warrant, exercisable until 2014, to purchase
  common stock at $.01 per share (B)                                  18 shs.         10/30/06           18,000           37,366
                                                                                                   ------------     ------------
                                                                                                      1,342,800        1,606,776
                                                                                                   ------------     ------------
DIVERSCO, INC./DHI HOLDINGS, INC.
A contract provider of janitorial and equipment maintenance services and temporary production labor to industrial customers.
Membership Interests of MM/Lincap
Diversco Investments Ltd. LLC (B)                                 13.57% int.         08/27/98          366,495             --
Preferred Stock (B)                                                1,639 shs.         12/14/01        1,392,067          659,713
Warrants, exercisable until 2011, to purchase
  common stock of DHI Holdings, Inc. at $.01 per share (B)         6,676 shs.               **          201,655             --
                                                                                                   ------------     ------------
                                                                                                      1,960,217          659,713
                                                                                                   ------------     ------------
*  08/12/04 and 01/14/05.
** 10/24/96 and 08/28/98.

--------------------------------------------------------------------------------------------------------------------------------
10


                                              MassMutual Participation Investors
CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES:(A)(Continued)                    Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
DUNCAN SYSTEMS, INC.
A distributor of windshields and side glass for the recreational vehicle market.
10% Senior Secured Term Note due 2013                            $    308,571         11/01/06     $    303,942     $    315,204
13% Senior Subordinated Note due 2014                            $    488,572         11/01/06          445,662          493,458
Common Stock (B)                                                 102,857 shs.         11/01/06          102,857           82,492
Warrant, exercisable until 2014, to purchase
  common stock at $.01 per share (B)                              32,294 shs.         11/01/06           44,663           25,900
                                                                                                   ------------     ------------
                                                                                                        897,124          917,054
                                                                                                   ------------     ------------
DWYER GROUP, INC.
A franchiser of a variety of home repair services.
Common Stock (B)                                                   3,656 shs.                *          365,600          604,820
Warrant, exercisable until 2011, to purchase
  common stock at $.01 per share (B)                               1,077 shs.         10/30/03           98,719          178,106
                                                                                                   ------------     ------------
                                                                                                        464,319          782,926
                                                                                                   ------------     ------------
E S P HOLDCO, INC.
A manufacturer of power protection technology for commercial office equipment, primarily supplying the office equipment dealer
network.
14% Senior Subordinated Note due 2015                            $  1,216,653         01/08/08        1,194,321        1,183,528
Common Stock (B)                                                     349 shs.         01/08/08          174,701           56,621
                                                                                                   ------------     ------------
                                                                                                      1,369,022        1,240,149
                                                                                                   ------------     ------------
E X C ACQUISITION CORPORATION
A manufacturer of pre-filled syringes and pump systems used for intravenous drug delivery.
Warrant, exercisable until 2014, to purchase
  common stock at $.01 per share (B)                                  11 shs.         06/28/04           40,875          140,506
                                                                                                   ------------     ------------
F C X HOLDINGS CORPORATION
A distributor of specialty/technical valves, actuators, accessories, and process instrumentation supplying a number of industrial,
high purity, and energy end markets in North America.
15% Senior Subordinated Note due 2015                            $  1,152,031         10/06/08        1,128,635        1,164,625
Preferred Stock (B)                                                2,298 shs.         10/06/08          229,804          128,669
Common Stock (B)                                                   1,625 shs.         10/06/08            1,625             --
                                                                                                   ------------     ------------
                                                                                                      1,360,064        1,293,294
                                                                                                   ------------     ------------
F H S HOLDINGS LLC
A national provider of customized disease management services to large self-insured employers.
12% Senior Subordinated Note due 2014 (D)                        $  1,265,625         06/01/06        1,175,533          632,813
Limited Liability Company Units of Linden/FHS
  Holdings LLC (B)                                                    84 uts.         06/01/06           84,368             --
Common Unit Class B (B)                                              734 uts.         06/01/06           64,779             --
                                                                                                   ------------     ------------
                                                                                                      1,324,680          632,813
                                                                                                   ------------     ------------
* 10/30/03 and 01/02/04.

--------------------------------------------------------------------------------------------------------------------------------
                                                                                                                              11


CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES:(A)(Continued)                    Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
FLUTES, INC.
An independent manufacturer of micro fluted corrugated sheet material for the food and consumer products packaging industries.
10% Senior Secured Term Note due 2013 (D)                        $    524,791         04/13/06     $    516,919     $    131,198
14% Senior Subordinated Note due 2014 (D)                        $    317,177         04/13/06          283,220             --
Common Stock (B)  62,535 shs.                                        04/13/06                            62,535             --
Warrant, exercisable until 2014, to purchase
  common stock at $.01 per share (B)                              17,680 shs.         04/13/06           27,676             --
                                                                                                   ------------     ------------
                                                                                                        890,350          131,198
                                                                                                   ------------     ------------
FOWLER HOLDING, INC.
A provider of site development services to residential homebuilders and developers in the Raleigh/Durham region of North Carolina.
12% Senior Subordinated Note due 2013 (D)                        $  1,252,174         02/03/06        1,123,044             --
Common Stock (B)                                                      98 shs.         02/03/06           97,826             --
Warrant, exercisable until 2013, to purchase
  common stock at $.01 per share (B)                                 135 shs.         02/03/06          110,348             --
                                                                                                   ------------     ------------
                                                                                                      1,331,218             --
                                                                                                   ------------     ------------
FUEL SYSTEMS HOLDING CORPORATION
An independent North American supplier of fuel tanks for a wide variety of commercial vehicles.
12% Senior Subordinated Note due 2014 (D)                        $  1,237,500         01/31/06        1,149,638             --
Preferred Stock (B)                                               16,792 shs.         06/12/08           16,792             --
Common Stock (B)                                                 112,500 shs.         01/31/06          112,500             --
Warrant, exercisable until 2016, to purchase
  common stock at $.01 per share (B)                              73,275 shs.         01/31/06           63,113             --
                                                                                                   ------------     ------------
                                                                                                      1,342,043             --
                                                                                                   ------------     ------------
GOLDEN COUNTY FOODS HOLDING, INC.
A manufacturer of frozen appetizers and snacks.
12% Senior Subordinated Note due 2015                            $  1,012,500         11/01/07          914,607          810,000
16% PIK Note due 2015                                            $    207,545         12/31/08          169,580          166,036
8% Series A Convertible Preferred Stock, convertible into
  4.25% of the fully diluted common shares (B)                    77,643 shs.         11/01/07           77,643             --
                                                                                                   ------------     ------------
                                                                                                      1,161,830          976,036
                                                                                                   ------------     ------------
H M HOLDING COMPANY
A designer, manufacturer, and importer of promotional and wood furniture.
12% Senior Subordinated Note due 2013 (D)                        $  1,170,000         02/10/06        1,084,725             --
Preferred Stock (B)                                                   21 shs.                *           21,428             --
Common Stock (B)                                                     180 shs.         02/10/06          180,000             --
Warrant, exercisable until 2013, to purchase
  common stock at $.02 per share (B)                                  67 shs.         02/10/06           61,875             --
                                                                                                   ------------     ------------
                                                                                                      1,348,028             --
                                                                                                   ------------     ------------
* 09/18/07 and 06/27/08.

--------------------------------------------------------------------------------------------------------------------------------
12


                                              MassMutual Participation Investors
CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES:(A)(Continued)                    Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
HIGHGATE CAPITAL LLC
An acquirer of controlling or substantial interests in manufacturing and marketing entities.
Series A Preferred Units (B)                                       0.30% int.         07/21/94     $     91,866     $       --
                                                                                                   ------------     ------------
HOME DECOR HOLDING COMPANY
A designer, manufacturer and marketer of framed art and wall decor products.
12.5% Senior Subordinated Note due 2012                          $  1,081,731                *        1,022,243        1,074,883
Common Stock (B)                                                      33 shs.                *           33,216           28,072
Warrant, exercisable until 2012, to purchase
  common stock at $.02 per share (B)                                 106 shs.                *          105,618           89,252
                                                                                                   ------------     ------------
                                                                                                      1,161,077        1,192,207
                                                                                                   ------------     ------------
HOSPITALITY MINTS HOLDING COMPANY
A manufacturer of individually-wrapped imprinted promotional mints.
12% Senior Subordinated Note due 2016                            $  1,098,837         08/19/08        1,016,628        1,071,987
Common Stock (B)                                                     251 shs.         08/19/08          251,163           66,151
Warrant, exercisable until 2016, to purchase
  common stock at $.01 per share (B)                                  65 shs.         08/19/08           60,233           17,099
                                                                                                   ------------     ------------
                                                                                                      1,328,024        1,155,237
                                                                                                   ------------     ------------
INSURANCE CLAIMS MANAGEMENT, INC.
A third party administrator providing auto and property claim administration services for insurance companies.
Common Stock (B)                                                      37 shs.         02/27/07            1,100           60,292
Warrant, exercisable until 2011, to purchase
  common stock at $.01 per share (B)                                  11 shs.         02/27/07              324           17,761
                                                                                                   ------------     ------------
                                                                                                          1,424           78,053
                                                                                                   ------------     ------------
INTEGRATION TECHNOLOGY SYSTEMS, INC.
A manufacturer of steel protective computer and network systems for the industrial and office environments.
12% Senior Subordinated Note due on demand                       $     25,055         03/01/04                1             --
Common Stock (B)                                                     130 shs.         06/01/00          149,500             --
                                                                                                   ------------     ------------
                                                                                                        149,501             --
                                                                                                   ------------     ------------
INTERNATIONAL OFFSHORE SERVICES LLC
A leading provider of marine transportation services, platform decomissioning, and salvage services to oil and gas producers, in the
shallow waters of the Gulf of Mexico.
14.25% Senior Subordinated Secured Note due 2017                 $  1,350,000         07/07/09        1,217,417        1,390,500
Limited Liability Company Unit (B)                                 1,647 uts.         07/07/09           98,833               16
                                                                                                   ------------     ------------
                                                                                                      1,316,250        1,390,516
                                                                                                   ------------     ------------
* 06/30/04 and 08/19/04.

--------------------------------------------------------------------------------------------------------------------------------
                                                                                                                              13


CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES:(A)(Continued)                    Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
JASON, INC.
A diversified manufacturing company serving various industrial markets.
13% Senior Subordinated Note due 2010 (D)                        $    510,187         08/04/00     $    449,086     $    255,094
Limited Partnership Interest of
  Saw Mill Capital Fund II, L.P. (B)                               1.30% int.         08/03/00          469,312             --
Warrant, exercisable until 2010, to purchase
  common stock at $.01 per share (B)                              26,931 shs.         08/04/00           61,101             --
                                                                                                   ------------     ------------
                                                                                                        979,499          255,094
                                                                                                   ------------     ------------
JUSTRITE MANUFACTURING ACQUISITION CO.
A manufacturer of safety products such as storage cabinets and containers.
12% Senior Subordinated Note due 2011                            $    843,750         12/15/04          819,336          843,750
Warrant, exercisable until 2011, to purchase
  common stock at $.01 per share (B)                                 594 shs.         12/15/04           53,528           96,998
                                                                                                   ------------     ------------
                                                                                                        872,864          940,748
                                                                                                   ------------     ------------
K H O F HOLDINGS, INC.
A manufacturer of premium disposable tableware products serving both the foodservice and consumer channels.
14% Senior Subordinated Note due 2014                            $  1,282,379         10/15/07        1,256,778        1,308,026
Common Stock (B)                                                 116,827 shs.         10/15/07          116,827           88,614
                                                                                                   ------------     ------------
                                                                                                      1,373,605        1,396,640
                                                                                                   ------------     ------------
K N B HOLDINGS CORPORATION
A designer, manufacturer and marketer of products for the custom framing market.
13.5% Senior Subordinated Note due 2013                          $  1,344,732         05/25/06        1,292,963        1,143,022
Common Stock (B)                                                  71,053 shs.         05/25/06           71,053             --
Warrant, exercisable until 2013, to purchase
  common stock at $.01 per share (B)                              43,600 shs.         05/25/06           37,871             --
                                                                                                   ------------     ------------
                                                                                                      1,401,887        1,143,022
                                                                                                   ------------     ------------
K P I HOLDINGS, INC.
Pace Industries is the largest player in the U.S. non-automotive, non-ferrous die casting segment.
13% Senior Subordinated Note due 2014 (D)                        $  1,115,217         07/16/08        1,042,077          836,413
Convertible Preferred Stock Series C (B)                              29 shs.         06/30/09           29,348           21,750
Convertible Preferred Stock Series D (B)                              13 shs.         09/17/09           12,958            9,720
Common Stock (B)                                                     235 shs.         07/15/08          234,783             --
Warrant, exercisable until 2018, to purchase
  common stock at $.01 per share (B)                                  51 shs.         07/16/08           50,836             --
                                                                                                   ------------     ------------
                                                                                                      1,370,002          867,883
                                                                                                   ------------     ------------

--------------------------------------------------------------------------------------------------------------------------------
14


                                              MassMutual Participation Investors
CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES:(A)(Continued)                    Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
K W P I HOLDINGS CORPORATION
A manufacturer and distributor of vinyl windows and patio doors throughout the northwestern United States.
12.75% Senior Subordinated Note due 2014                         $  1,372,848         03/14/07     $  1,256,317     $  1,098,278
Common Stock (B)                                                     123 shs.         03/13/07          123,000             --
Warrant, exercisable until 2019 to purchase
  preferred stock at $.01 per share (B)                               71 shs.         07/07/09             --               --
Warrant, exercisable until 2017, to purchase
  common stock at $.01 per share (B)                                  89 shs.         03/14/07           85,890             --
                                                                                                   ------------     ------------
                                                                                                      1,465,207        1,098,278
                                                                                                   ------------     ------------
K-TEK HOLDING CORPORATION
A manufacturer of instrumentation for liquid and bulk solids level detection for process and storage tanks.
14% Senior Subordinated Note due 2015                            $  1,198,984         12/20/07        1,176,925        1,222,964
Preferred Stock (B)                                              192,314 shs.         12/20/07          192,314          217,065
Common Stock (B)                                                  54,326 shs.         12/20/07              543           28,343
                                                                                                   ------------     ------------
                                                                                                      1,369,782        1,468,372
                                                                                                   ------------     ------------
M V I HOLDING, INC.
A manufacturer of large precision machined metal components used in equipment which services a variety of industries, including
the oil & gas, mining, and defense markets.
13% Senior Subordinated Note due 2016                            $    649,635         09/12/08          601,873          662,626
Common Stock (B)                                                      32 shs.         09/12/08           32,143           32,446
Warrant, exercisable until 2018, to purchase
  common stock at $.01 per share (B)                                  35 shs.         09/12/08           34,714           35,040
                                                                                                   ------------     ------------
                                                                                                        668,730          730,112
                                                                                                   ------------     ------------
MAIL COMMUNICATIONS GROUP, INC.
A provider of mail processing and handling services, lettershop services, and commercial printing services.
12.5% Senior Subordinated Note due 2014                          $    516,177         05/04/07          483,072          516,177
Limited Liability Company Unit (B)                                12,763 uts.                *          166,481          175,556
Warrant, exercisable until 2014, to purchase
  common stock at $.01 per share (B)                               1,787 shs.         05/04/07           22,781           24,579
                                                                                                   ------------     ------------
                                                                                                        672,334          716,312
                                                                                                   ------------     ------------
MAVERICK ACQUISITION COMPANY
A manufacturer of capsules that cover the cork and neck of wine bottles.
6.78% Senior Secured Tranche A Note due 2010 (C)                 $    168,042         09/03/04          168,042          166,914
12.5% Senior Secured Tranche B Note due 2011                     $    179,104         09/03/04          170,213          172,534
Limited Partnership Interest (B)                                   4.48% int.         09/03/04           33,582            6,819
Warrant, exercisable until 2011, to purchase
  common stock at $.01 per share (B)                                 243 shs.         09/03/04           22,556            4,927
                                                                                                   ------------     ------------
                                                                                                        394,393          351,194
                                                                                                   ------------     ------------
* 05/04/07 and 01/02/08.


--------------------------------------------------------------------------------------------------------------------------------
                                                                                                                              15


CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES:(A)(Continued)                    Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
MEDSYSTEMS HOLDINGS LLC
A manufacturer of enteral feeding products, such as feeding tubes and other products related to assisted feeding.
13% Senior Subordinated Note due 2015                            $    614,508         08/29/08     $    544,558     $    626,798
Preferred Unit (B)                                                    66 uts.         08/29/08           66,451           71,000
Common Unit Class A (B)                                              671 uts.         08/29/08              671           30,138
Common Unit Class B (B)                                              250 uts.         08/29/08           63,564           11,214
                                                                                                   ------------     ------------
                                                                                                        675,244          739,150
                                                                                                   ------------     ------------
MEGTEC HOLDINGS, INC.
A supplier of industrial and environmental products and services to a broad array of industries.
12% Senior Subordinated Note due 2016                            $  1,144,068         09/24/08        1,048,910        1,127,236
Preferred Stock (B)                                                   56 shs.         09/24/08           54,040           58,279
Limited Partnership Interest (B)                                 205,932 int.         09/16/08          205,932             --
Warrant, exercisable until 2018, to purchase
  common stock at $.01 per share (B)                                  18 shs.         09/24/08           18,237             --
                                                                                                   ------------     ------------
                                                                                                      1,327,119        1,185,515
                                                                                                   ------------     ------------
MICROGROUP, INC.
A manufacturer of precision parts and assemblies, and a value-added supplier of metal tubing and bars.
12% Senior Subordinated Note due 2013                            $  1,421,795                *        1,362,207        1,436,013
Common Stock (B)                                                     238 shs.                *          238,000          337,426
Warrant, exercisable until 2013, to purchase
  common stock at $.02 per share (B)                                  87 shs.                *           86,281          123,076
                                                                                                   ------------     ------------
                                                                                                      1,686,488        1,896,515
                                                                                                   ------------     ------------
MILWAUKEE GEAR COMPANY
A manufacturer of high-precision custom gears and gear drives used by original equipment manufacturers operating in a number of
industries.
13% Senior Subordinated Note due 2014                            $  1,246,154         07/21/08        1,177,306        1,230,173
Preferred Stock (B)                                                  139 shs.         07/21/08          138,374          131,716
Common Stock (B)                                                       9 shs.         07/21/08           10,000             --
Warrant, exercisable until 2014, to purchase
  common stock at $.01 per share (B)                                   6 shs.         07/21/08            5,510             --
                                                                                                   ------------     ------------
                                                                                                      1,331,190        1,361,889
                                                                                                   ------------     ------------
MOMENTUM HOLDING CO.
A designer and supplier of upholstery fabric to commercial furniture manufacturers and architectural and design firms.
Limited Partnership Interest (B)                                  11.24% int.         08/04/06           56,198          126,364
Warrant, exercisable until 2014, to purchase
  common stock at $.02 per share (B)                                 586 shs.         08/04/06           56,705          131,720
                                                                                                   ------------     ------------
                                                                                                        112,903          258,084
                                                                                                   ------------     ------------
* 08/12/05 and 09/11/06.

--------------------------------------------------------------------------------------------------------------------------------
16


                                              MassMutual Participation Investors
CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES:(A)(Continued)                    Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
MONESSEN HOLDING CORPORATION
A designer and manufacturer of a broad line of gas, wood, and electric hearth products and accessories.
14% Senior Subordinated Note due 2014                            $  1,350,000         07/25/08     $  1,271,272     $  1,080,000
14% PIK Note due 2014                                            $    359,867         07/25/08          312,512          287,894
Warrant, exercisable until 2014, to purchase
  common stock at $.02 per share (B)                                  81 shs.         03/31/06           73,125             --
                                                                                                   ------------     ------------
                                                                                                      1,656,909        1,367,894
                                                                                                   ------------     ------------
NABCO, INC.
A producer of explosive containment vessels in the United States.
14% Senior Subordinated Note due 2014                            $    431,692         02/24/06          370,490          323,769
Limited Liability Company Unit (B)                                   437 uts.                *          436,984             --
Warrant, exercisable until 2016, to purchase
  common stock at $.01 per share (B)                                  68 shs.         02/24/06           19,687             --
                                                                                                   ------------     ------------
                                                                                                        827,161          323,769
                                                                                                   ------------     ------------
NAVIS GLOBAL
A designer, manufacturer, seller and servicer of finishing machinery for the knit and woven segments of the global textile industry.
12% Senior Secured Term Note Series A due 2010                   $     67,416         11/14/08           67,416           67,416
14% Senior Subordinated Note due 2014 (D)                        $    764,921         05/28/04          660,453             --
10.75% Senior Secured Note due 2011 (D)                          $    348,118         05/28/04          347,086           87,030
Warrant, exercisable until 2012, to purchase
  common stock at $.01 per share (B)                             116,521 shs.         05/28/04           74,736             --
                                                                                                   ------------     ------------
                                                                                                      1,149,691          154,446
                                                                                                   ------------     ------------
NESCO HOLDINGS CORPORATION
A sales and leasing company that provides equipment to the electric utility, telecommunications, and various other industries.
12% Senior Secured Subordinated Note due 2015                    $  1,125,000         08/02/07          999,658        1,136,250
Common Stock (B)                                                 225,000 shs.         08/02/07          225,000          346,845
Warrant, exercisable until 2015, to purchase
  common stock at $.01 per share (B)                              63,191 shs.         08/02/07          102,842           97,411
                                                                                                   ------------     ------------
                                                                                                      1,327,500        1,580,506
                                                                                                   ------------     ------------
* 02/24/06 and 06/22/07.

--------------------------------------------------------------------------------------------------------------------------------
                                                                                                                              17


CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES:(A)(Continued)                    Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
NETSHAPE TECHNOLOGIES, INC.
A manufacturer of powder metal and metal injection molded precision components used in industrial, consumer, and other applications.
12% Senior Subordinated Note due 2014                            $    810,000         02/02/07     $    745,713     $    627,618
Limited Partnership Interest of
  Saw Mill PCG Partners LLC (B)                                    1.38% int.         02/01/07          539,978             --
Limited Liability Company Unit Class D of
  Saw Mill PCG Partners LLC (B)                                       22 uts.                *           22,083           11,040
Preferred Stock Class A (B)                                             1 sh.         12/18/08              726              360
Preferred Stock Class A-1 (B)                                           1 sh.         09/30/09            1,209              605
Warrant, exercisable until 2014, to purchase
  common stock at $.01 per share (B)                                  48 shs.         02/02/07           48,087             --
                                                                                                   ------------     ------------
                                                                                                      1,357,796          639,623
                                                                                                   ------------     ------------
NORTHWEST MAILING SERVICES, INC.
A producer of promotional materials for companies that use direct mail as part of their customer retention and loyalty programs.
12% Senior Subordinated Note due 2016                            $  1,207,895         07/09/09        1,001,888        1,256,211
Limited Partnership Interest (B)                                   1,421 uts.         07/09/09          142,105          135,000
Warrant, exercisable until 2019, to purchase
  common stock at $.01 per share (B)                               1,852 shs.         07/09/09          185,163               19
                                                                                                   ------------     ------------
                                                                                                      1,329,156        1,391,230
                                                                                                   ------------     ------------
NYLONCRAFT, INC.
A supplier of engineered plastic components for the automotive industry.
9% Senior Secured Note due 2009                                  $    464,286         01/28/02          464,286          348,215
11.5% Senior Subordinated Note due 2012 (D)                      $    857,143         01/28/02          820,159             --
Common Stock (B)                                                 178,571 shs.         01/28/02          178,571             --
Warrant, exercisable until 2012, to purchase
  common stock at $.01 per share (B)                             138,928 shs.         01/28/02           92,597             --
                                                                                                   ------------     ------------
                                                                                                      1,555,613          348,215
                                                                                                   ------------     ------------
OAKRIVER TECHNOLOGY, INC.
Designs, engineers and assembles high precision automated process equipment for the medical device industry, with a focus on
defibrillators and stents.
10% Senior Secured Note due 2012                                 $    167,771         01/03/06          165,255          171,233
13% Senior Subordinated Note due 2013                            $    392,709         01/03/06          361,756          392,709
Common Stock (B)                                                 184,176 shs.         01/03/06          184,176          136,048
Warrant, exercisable until 2013, to purchase
  common stock at $.01 per share (B)                              43,073 shs.         01/03/06           35,900           31,817
                                                                                                   ------------     ------------
                                                                                                        747,087          731,807
                                                                                                   ------------     ------------
* 12/18/08 and 09/30/09.

--------------------------------------------------------------------------------------------------------------------------------
18


                                              MassMutual Participation Investors
CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES:(A)(Continued)                    Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
OLYMPIC SALES, INC.
A boat retailer in Washington state, Oregon, California and British Columbia.
12% Senior Subordinated Note due 2009 (D)                        $    511,000         08/07/98     $    511,000     $     76,650
12% Senior Subordinated Note due 2009 (D)                        $    244,154         02/09/00          213,313           36,623
                                                                                                   ------------     ------------
                                                                                                        724,313          113,273
                                                                                                   ------------     ------------
ONTARIO DRIVE & GEAR LTD.
A manufacturer of all-wheel drive, off-road amphibious vehicles and related accessories.
Limited Liability Company Unit (B)                                 1,942 uts.         01/17/06          302,885          240,042
Warrant, exercisable until 2013, to purchase
  common stock at $.01 per share (B)                                 328 shs.         01/17/06           90,424           40,528
                                                                                                   ------------     ------------
                                                                                                        393,309          280,570
                                                                                                   ------------     ------------
P A S HOLDCO LLC
An independent provider of maintenance, repair and overhaul services to the aerospace gas turbine engine and airframe markets.
14% Senior Subordinated Note due 2014                            $  1,224,360         07/03/06        1,173,762        1,236,604
Preferred Unit (B)                                                   202 uts.         07/03/06          202,320          281,552
Preferred Unit (B)                                                    36 uts.         07/03/06           36,420           50,683
Common Unit Class I (B)                                               78 uts.         07/03/06             --            171,450
Common Unit Class L (B)                                               17 uts.         07/03/06             --             36,220
                                                                                                   ------------     ------------
                                                                                                      1,412,502        1,776,509
                                                                                                   ------------     ------------
P I I HOLDING CORPORATION
A manufacturer of plastic film and bags for the general industrial, medical, and food industries.
12% Senior Subordinated Note due 2013                            $  1,215,000         03/31/06        1,155,486        1,215,000
Preferred Stock (B)                                                   19 shs.         03/31/06          174,492          231,669
Common Stock (B)                                                      12 shs.         03/31/06           13,500           53,713
Warrant, exercisable until 2013, to purchase
  common stock at $.01 per share (B)                                   7 shs.         03/31/06            5,888           31,255
                                                                                                   ------------     ------------
                                                                                                      1,349,366        1,531,637
                                                                                                   ------------     ------------
PACIFIC CONSOLIDATED HOLDINGS LLC
A manufacturer of rugged, mobile liquid and gaseous oxygen and nitrogen generating systems used in the global defense, oil & gas,
and medical sectors.
14% Senior Subordinated Note due 2012                            $    704,835         04/27/07          660,393          675,760
Limited Liability Company Unit (B)                               928,962 uts.         04/27/07           33,477             --
                                                                                                   ------------     ------------
                                                                                                        693,870          675,760
                                                                                                   ------------     ------------
PARADIGM PACKAGING, INC.
A manufacturer of plastic bottles and closures for the nutritional, pharmaceutical, personal care, and food packaging markets.
12% Senior Subordinated Note due 2011                            $  1,125,000         12/19/00        1,081,714        1,119,352
Membership Interests of MM/Lincap
  PPI Investments, Inc., LLC (B)                                   1.28% int.         12/21/00          140,625           93,799
                                                                                                   ------------     ------------
                                                                                                      1,222,339        1,213,151
                                                                                                   ------------     ------------

--------------------------------------------------------------------------------------------------------------------------------
                                                                                                                              19


CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES:(A)(Continued)                    Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
PEARLMAN ENTERPRISES, INC.
A developer and distributor of tools, equipment and supplies to the natural and engineered stone industry.
Preferred Stock Series A (B)                                       1,236 shs.         05/22/09     $     59,034     $       --
Preferred Stock Series B (B)                                       7,059 shs.         05/22/09          290,050             --
Common Stock (B)                                                  21,462 shs.         05/22/09          993,816             --
                                                                                                   ------------     ------------
                                                                                                      1,342,900             --
                                                                                                   ------------     ------------
POSTLE ALUMINUM COMPANY LLC
A manufacturer and distributor of aluminum extruded products.
3% Senior Subordinated PIK Note due 2014 (D)                     $  1,163,700         10/02/06        1,066,355          290,925
Limited Liability Company Unit Class A                               733 uts.         10/02/06          270,000             --
Limited Liability Company Unit                                        76 uts.         05/22/09           38,140           36,049
Warrant, exercisable until 2016, to purchase
  common stock at $.01 per share (B)                               4,550 shs.         10/02/06           65,988             --
                                                                                                   ------------     ------------
                                                                                                      1,440,483          326,974
                                                                                                   ------------     ------------
POWER SERVICES HOLDING COMPANY
A provider of industrial motor repair services, predictive and preventative maintenance, and performance improvement consulting,
serving the petrochemical, mining, power generation, metals, and paper industries.
12% Senior Subordinated Note due 2016                            $  1,255,814         02/11/08        1,153,083        1,280,930
Limited Partnership Interest (B)                                  12.55% int.         02/11/08           94,092           48,744
Warrant, exercisable until 2016, to purchase
  common stock at $.01 per share (B)                                 700 shs.         02/11/08           88,723           96,065
                                                                                                   ------------     ------------
                                                                                                      1,335,898        1,425,739
                                                                                                   ------------     ------------
QUALIS AUTOMOTIVE LLC
A distributor of aftermarket automotive brake and chassis products.
12% Senior Subordinated Note due 2012                            $    922,612         05/28/04          846,452          948,254
Common Stock (B)                                                 187,500 shs.         05/28/04          187,500           30,995
Warrant, exercisable until 2012, to purchase
  common stock at $.01 per share (B)                             199,969 shs.         05/28/04          199,969           33,056
                                                                                                   ------------     ------------
                                                                                                      1,233,921        1,012,305
                                                                                                   ------------     ------------
R A J MANUFACTURING HOLDINGS LLC
A designer and manufacturer of women's swimwear sold under a variety of licensed brand names.
12.5% Senior Subordinated Note due 2014                          $  1,200,277         12/15/06        1,106,663        1,189,097
Limited Liability Company Unit (B)                                 1,497 uts.         12/15/06          149,723           84,048
Warrant, exercisable until 2014, to purchase
  common stock at $.01 per share (B)                                   2 shs.         12/15/06           69,609           39,662
                                                                                                   ------------     ------------
                                                                                                      1,325,995        1,312,807
                                                                                                   ------------     ------------

--------------------------------------------------------------------------------------------------------------------------------
20


                                              MassMutual Participation Investors
CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES:(A)(Continued)                    Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
R E I DELAWARE HOLDING, INC.
An engineer and manufacturer of highly complex, close tolerance components, assemblies, tooling and custom automation equipment
primarily for aerospace, medical and defense/radar markets.
12% Senior Subordinated Note due 2016                            $  1,350,000         01/18/08     $  1,306,541     $  1,365,987
Warrant, exercisable until 2018, to purchase
  common stock at $.01 per share (B)                                   3 shs.         01/18/08           16,459           30,196
                                                                                                   ------------     ------------
                                                                                                      1,323,000        1,396,183
                                                                                                   ------------     ------------
ROYAL BATHS MANUFACTURING COMPANY
A manufacturer and distributor of acrylic and cultured marble bathroom products.
12.5% Senior Subordinated Note due 2011                          $    562,500         11/14/03          538,325          542,790
Warrant, exercisable until 2011, to purchase
  common stock at $.01 per share (B)                                  74 shs.         11/14/03           65,089             --
                                                                                                   ------------     ------------
                                                                                                        603,414          542,790
                                                                                                   ------------     ------------
SAFETY SPEED CUT MANUFACTURING COMPANY, INC.
A manufacturer of vertical panel saws and routers for the wood working industry.
Class B Common Stock (B)                                             846 shs.         06/02/99          146,456          264,562
SAVAGE SPORTS HOLDING, INC.
A manufacturer of sporting firearms.
12% Senior Subordinated Note due 2012                            $    814,655         09/10/04          783,332          814,655
Common Stock (B)                                                     324 shs.                *          340,378          543,999
Warrant, exercisable until 2012, to purchase
  common stock at $.01 per share (B)                                  71 shs.         09/10/04           60,129          118,773
                                                                                                   ------------     ------------
                                                                                                      1,183,839        1,477,427
                                                                                                   ------------     ------------
SENCORE HOLDING COMPANY
A designer, manufacturer, and marketer of decoders, receivers and modulators sold to broadcasters, satellite, cable and telecom
operators for encoding/decoding analog and digital transmission video signals.
12.5% Senior Subordinated Note due 2014                          $    934,615         01/15/09          816,574          853,234
Common Stock (B)                                                      69 shs.         01/15/09           69,231           17,308
Warrant, exercisable until 2019, to purchase
  common stock at $.01 per share (B)                                 149 shs.         01/15/09          149,084                1
                                                                                                   ------------     ------------
                                                                                                      1,034,889          870,543
                                                                                                   ------------     ------------
SMART SOURCE HOLDINGS LLC
A short-term computer rental company.
12% Senior Subordinated Note due 2015                            $  1,176,924               **        1,079,914        1,176,924
Limited Liability Company Unit (B)                                   328 uts.               **          337,762          272,481
Warrant, exercisable until 2015, to purchase
  common stock at $.01 per share (B)                                  83 shs.               **           87,231           69,020
                                                                                                   ------------     ------------
                                                                                                      1,504,907        1,518,425
                                                                                                   ------------     ------------
*  09/10/04 and 10/05/07.
** 08/31/07 and 03/06/08.

--------------------------------------------------------------------------------------------------------------------------------
                                                                                                                              21


CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES:(A)(Continued)                    Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
SPECIALTY COMMODITIES, INC.
A distributor of specialty food ingredients.
13.25% Senior Subordinated Note due 2016                         $  1,205,175         10/23/08     $  1,131,035     $  1,241,331
Common Stock (B)                                                  15,882 shs.         10/23/08          158,824          150,879
Warrant, exercisable until 2018, to purchase
common stock at $.01 per share (B)                                 5,852 shs.         10/23/08           53,285               59
                                                                                                   ------------     ------------
                                                                                                      1,343,144        1,392,269
                                                                                                   ------------     ------------
STANTON CARPET HOLDING CO.
A designer and marketer of high and mid-priced decorative carpets and rugs.
12.13% Senior Subordinated Note due 2014                         $  1,185,366         08/01/06        1,125,694        1,105,070
Common Stock (B)                                                     165 shs.         08/01/06          164,634           13,038
Warrant, exercisable until 2014, to purchase
  common stock at $.02 per share (B)                                  55 shs.         08/01/06           49,390            4,342
                                                                                                   ------------     ------------
                                                                                                      1,339,718        1,122,450
                                                                                                   ------------     ------------
SYNTERACT HOLDINGS CORPORATION
A provider of outsourced clinical trial management services to pharmaceutical and biotechnology companies.
14% Senior Subordinated Note due 2016                            $  1,364,800         09/02/08        1,276,154        1,392,096
Redeemable Preferred Stock Series A (B)                              678 shs.         09/02/08            6,629           23,054
Warrant, exercisable until 2018, to purchase
  common stock at $.01 per share (B)                               6,778 shs.         09/02/08           59,661             --
                                                                                                   ------------     ------------
                                                                                                      1,342,444        1,415,150
                                                                                                   ------------     ------------
T H I ACQUISITION, INC.
A machine servicing company providing value-added steel services to long steel products.
12% Senior Subordinated Note due 2016                            $  1,350,000         01/14/08        1,276,383        1,350,000
Warrant, exercisable until 2016, to purchase
  common stock at $.01 per share (B)                                   5 shs.         01/14/08           46,617           39,699
                                                                                                   ------------     ------------
                                                                                                      1,323,000        1,389,699
                                                                                                   ------------     ------------
TANGENT RAIL CORPORATION
A manufacturer of rail ties and provider of specialty services to the North American railroad industry.
13% Senior Subordinated Note due 2015                            $  1,173,909         10/14/05        1,033,473        1,173,909
Common Stock (B)                                                   1,167 shs.         10/14/05            1,167          488,518
Warrant, exercisable until 2015, to purchase
  common stock at $.01 per share (B)                                 631 shs.         09/30/08          300,683          264,143
                                                                                                   ------------     ------------
                                                                                                      1,335,323        1,926,570
                                                                                                   ------------     ------------
TELECORPS HOLDINGS, INC.
A provider of equipment and services to producers of television shows and motion pictures.
12.75% Senior Subordinated Note due 2016                         $  1,681,677                *        1,474,695        1,732,127
Common Stock (B)                                                     143 shs.         09/02/09            5,823            5,532
Warrant, exercisable until 2019, to purchase
  common stock at $.01 per share (B)                               4,187 shs.                *          173,349               42
                                                                                                   ------------     ------------
                                                                                                      1,653,867        1,737,701
                                                                                                   ------------     ------------
* 05/20/09 and 09/02/09.

--------------------------------------------------------------------------------------------------------------------------------
22


                                              MassMutual Participation Investors
CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES:(A)(Continued)                    Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
TERRA RENEWAL LLC
A provider of wastewater residual management and required environmental reporting, permitting, nutrient management planning and
record keeping to companies involved in poultry and food processing.
12% Senior Subordinated Note due 2014                            $    664,062                *     $    637,480     $    531,250
6.75% Term Note due 2012 (C)                                     $    861,861                *          858,653          775,675
Limited Partnership Interest of
  Saw Mill Capital Fund V, LLC (B)                                 2.27% int.               **           85,292             --
Warrant, exercisable until 2016, to purchase
  common stock at $.01 per share (B)                                  41 shs.         04/28/06           33,738             --
                                                                                                   ------------     ------------
                                                                                                      1,615,163        1,306,925
                                                                                                   ------------     ------------
TORRENT GROUP HOLDINGS, INC.
A contractor specializing in the sales and installation of engineered drywells for the retention and filtration of stormwater and
nuisance water flow.
12.5% Senior Subordinated Note due 2013                          $  1,185,366         10/26/07        1,113,016        1,007,561
Series A Preferred Stock (B)                                         219 shs.         10/26/07          219,203             --
                                                                                                   ------------     ------------
                                                                                                      1,332,219        1,007,561
                                                                                                   ------------     ------------
TOTAL E & S, INC.
A manufacturer of a wide variety of equipment used in the oil and gas industry.
10.5% Senior Secured Term Note due 2013                          $    486,487         03/02/07          479,190          462,163
13% Senior Subordinated Note due 2014                            $    341,971         03/02/07          280,347          256,478
Common Stock (B)                                                  71,542 shs.         03/02/07           71,542             --
Warrant, exercisable until 2014 to purchase
  common stock at $.01 per share (B)                              19,733 shs.         03/02/07           54,784             --
                                                                                                   ------------     ------------
                                                                                                        885,863          718,641
                                                                                                   ------------     ------------
TRANSPAC HOLDING COMPANY
A designer, importer, and wholesaler of home decor and seasonal gift products.
12% Senior Subordinated Note due 2015 (D)                        $    938,651         10/31/07          873,498          797,853
Common Stock (B)                                                     110 shs.         10/31/07          110,430             --
Warrant, exercisable until 2015, to purchase
  common stock at $.01 per share (B)                                  50 shs.         10/31/07           46,380             --
                                                                                                   ------------     ------------
                                                                                                      1,030,308          797,853
                                                                                                   ------------     ------------
TRANSTAR HOLDING COMPANY
A distributor of aftermarket automotive transmission parts.
12% Senior Subordinated Note due 2014                            $    918,000         08/31/05          889,663          927,180
Common Stock (B)                                                     571 shs.              ***          570,944          519,016
Warrant, exercisable until 2013, to purchase
  common stock at $.02 per share (B)                                  46 shs.         08/31/05           41,021           41,362
                                                                                                   ------------     ------------
                                                                                                      1,501,628        1,487,558
                                                                                                   ------------     ------------
*   04/28/06 and 09/13/06.
**  03/01/05 and 10/10/08.
*** 08/31/05 and 04/30/07.


--------------------------------------------------------------------------------------------------------------------------------
                                                                                                                              23


CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES:(A)(Continued)                    Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
TRANZONIC COMPANIES (THE)
A producer of commercial and industrial supplies, such as safety products, janitorial supplies, work apparel, washroom and restroom
supplies and sanitary care products.
13% Senior Subordinated Note due 2010                            $  1,356,000         02/05/98     $  1,326,978     $  1,356,000
Common Stock (B)                                                     315 shs.         02/04/98          315,000          271,830
Warrant, exercisable until 2010, to purchase
  common stock at $.01 per share (B)                                 222 shs.         02/05/98          184,416          191,575
                                                                                                   ------------     ------------
                                                                                                      1,826,394        1,819,405
                                                                                                   ------------     ------------
TRUCK BODIES & EQUIPMENT INTERNATIONAL
A designer and manufacturer of accessories for heavy and medium duty trucks, primarily dump bodies, hoists, various forms of flatbed
bodies, landscape bodies and other accessories.
16% Senior Subordinated Note due 2010 (D)                        $  1,222,698                *        1,133,973          305,675
16% PIK Note due 2010 (D)                                        $    338,540         12/30/08           84,635           84,635
Preferred Stock Series B (B)                                         128 shs.         10/20/08          127,677             --
Common Stock (B)                                                     393 shs.                *          423,985             --
Warrant, exercisable until 2013, to purchase
  common stock at $.02 per share (B)                                  81 shs.                *           84,650             --
Warrant, exercisable until 2018, to purchase
  common stock at $.01 per share (B)                                 558 shs.         10/20/08             --               --
                                                                                                   ------------     ------------
                                                                                                      1,854,920          390,310
                                                                                                   ------------     ------------
TRUSTILE DOORS, INC.
A manufacturer and distributor of interior doors.
Warrant, exercisable until 2010, to purchase
  common stock at $.01 per share (B)                               3,060 shs.         04/11/03           36,032          120,575
                                                                                                   ------------     ------------
U M A ENTERPRISES, INC.
An importer and wholesaler of home decor products.
15% Senior Subordinated Note due 2015                            $    924,872         02/08/08          904,738          903,270
Convertible Preferred Stock (B)                                      470 shs.         02/08/08          469,565           12,267
                                                                                                   ------------     ------------
                                                                                                      1,374,303          915,537
                                                                                                   ------------     ------------
U-LINE CORPORATION
A manufacturer of high-end, built-in, undercounter ice making, wine storage and refrigeration appliances.
12.5% Senior Subordinated Note due 2012                          $    996,500         04/30/04          943,396          847,025
Common Stock (B)                                                      96 shs.         04/30/04           96,400             --
Warrant, exercisable until 2012, to purchase
  common stock at $.01 per share (B)                                 122 shs.         04/30/04          112,106             --
                                                                                                   ------------     ------------
                                                                                                      1,151,902          847,025
                                                                                                   ------------     ------------
* 07/19/05 and 12/22/05.

--------------------------------------------------------------------------------------------------------------------------------
24


                                              MassMutual Participation Investors
CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES:(A)(Continued)                    Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
VISIONEERING, INC.
A designer and manufacturer of tooling and fixtures for the aerospace industry.
10.5% Senior Secured Term Loan due 2013                          $    458,824         05/17/07     $    451,941     $    464,797
13% Senior Subordinated Note due 2014                            $    370,588         05/17/07          338,606          374,294
18% PIK Convertable Preferred Stock (B)                           21,361 shs.         03/13/09           41,440           39,368
Common Stock (B)                                                  70,588 shs.         05/17/07           70,588            1,970
Warrant, exercisable until 2014, to purchase
  common stock at $.01 per share (B)                              20,003 shs.         05/17/07           31,460              558
                                                                                                   ------------     ------------
                                                                                                        934,035          880,987
                                                                                                   ------------     ------------
VITALITY FOODSERVICE, INC.
A non-carbonated beverage dispensing company focused on the foodservice industry.
13% Senior Subordinated Note due 2011                            $    999,153         09/24/04          959,785          994,887
Common Stock (B)                                                  14,006 shs.                *          140,064          152,980
Warrant, exercisable until 2011, to purchase
  common stock at $.01 per share (B)                              12,593 shs.         09/24/04           98,938          137,547
                                                                                                   ------------     ------------
                                                                                                      1,198,787        1,285,414
                                                                                                   ------------     ------------
VITEX PACKAGING GROUP, INC.
A manufacturer of specialty packaging, primarily envelopes and tags used on tea bags.
12.5% Senior Subordinated Note due 2012 (D)                      $    900,000         07/19/04          785,152             --
14.5% PIK Note due 2010 (D)                                      $    215,976         06/30/07          180,500             --
Limited Liability Company Unit Class A (B)                       219,375 uts.         07/19/04          219,375             --
Limited Liability Company Unit Class B (B)                        96,848 uts.         07/19/04           96,848             --
                                                                                                   ------------     ------------
                                                                                                      1,281,875             --
                                                                                                   ------------     ------------
WAGGIN' TRAIN HOLDINGS LLC
A producer of premium quality meat dog treats.
14% Senior Subordinated Note due 2014                            $  1,169,238         11/15/07        1,145,033        1,192,619
Limited Liability Company Unit Class B (B)                           224 uts.         11/15/07          223,757          254,503
Limited Liability Company Unit Class C (B)                           224 uts.         11/15/07             --            118,259
                                                                                                   ------------     ------------
                                                                                                      1,368,790        1,565,381
                                                                                                   ------------     ------------
WALLS INDUSTRIES, INC.
A provider of branded workwear and sporting goods apparel.
Limited Partnership Interest (B)                                   0.20% int.         07/12/04            1,974             --
Common Stock (B)                                                   2,133 shs.         12/21/07             --               --
                                                                                                   ------------     ------------
                                                                                                          1,974             --
                                                                                                   ------------     ------------
WELLBORN FOREST HOLDING CO.
A manufacturer of semi-custom kitchen and bath cabinetry.
12.13% Senior Subordinated Note due 2014                         $    911,250         11/30/06          858,327          774,563
Common Stock (B)                                                     101 shs.         11/30/06          101,250             --
Warrant, exercisable until 2014, to purchase
  common stock at $.01 per share (B)                                  51 shs.         11/30/06           45,790             --
                                                                                                   ------------     ------------
                                                                                                      1,005,367          774,563
                                                                                                   ------------     ------------
* 09/24/04 and 12/22/06.

--------------------------------------------------------------------------------------------------------------------------------
                                                                                                                              25


CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                               Principal Amount
                                                                Shares, Units
                                                                 or Ownership        Acquisition
CORPORATE RESTRICTED SECURITIES:(A)(Continued)                    Percentage            Date           Cost          Fair Value
                                                                 ------------         --------     ------------     ------------
                                                                                                        
WORKPLACE MEDIA HOLDING CO.
A direct marketer specializing in providing advertisers with access to consumers in the workplace.
13% Senior Subordinated Note due 2015                            $    613,692         05/14/07     $    565,304     $    567,056
Limited Partnership Interest (B)                                  12.26% int.         05/14/07           61,308             --
Warrant, exercisable until 2015, to purchase
  common stock at $.02 per share (B)                                  47 shs.         05/14/07           44,186             --
                                                                                                   ------------     ------------
                                                                                                        670,798          567,056
                                                                                                   ------------     ------------
XALOY SUPERIOR HOLDINGS, INC.
A provider of melt processing components and ancillary equipment for both plastic injection molding and extrusion applications.
15% Senior Subordinated Note due 2015 (D)                        $  1,229,741         09/08/08        1,203,293          614,870
Common Stock (B)                                                     150 shs.         09/08/08          150,000             --
                                                                                                   ------------     ------------
                                                                                                      1,353,293          614,870
                                                                                                   ------------     ------------


TOTAL PRIVATE PLACEMENT INVESTMENTS (E)                                                             112,371,878       95,787,665
                                                                                                   ------------     ------------











--------------------------------------------------------------------------------------------------------------------------------
26


                                              MassMutual Participation Investors
CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                                         Shares or
                                                  Interest     Due       Principal
CORPORATE RESTRICTED SECURITIES: (A) (Continued)    Rate       Date        Amount         Cost       Fair Value
                                                  -------    --------   ------------  ------------  ------------
                                                                                     
RULE 144A SECURITIES - 4.33%:

BONDS - 4.33%
ACCO Brands Corporation                           10.625%    03/15/15   $     45,000  $     44,326  $     47,081
Affinia Group, Inc.                               10.750     08/15/16         25,000        24,700        26,813
Allegheny Energy Supply                            8.250     04/15/12        500,000       518,944       550,790
Anheuser-Busch Inbev Wld, Inc.                     7.720     01/15/19        500,000       499,615       591,630
Appleton Papers, Inc.                             11.250     12/15/15        252,500       250,000       204,841
Cenveo Corporation                                10.500     08/15/16         45,000        45,000        42,300
Compucom Systems, Inc.                            12.500     10/01/15        670,000       650,817       624,775
Douglas Dynamics LLC                               7.750     01/15/12        485,000       461,804       417,100
G F S I, Inc. (C)                                 10.500     06/01/11        358,000       343,948       266,710
Gannett Company, Inc.                              8.750     11/15/14         25,000        24,616        24,500
Gannett Company, Inc.                              9.375     11/15/17         60,000        59,149        58,800
H C A, Inc.                                        9.875     02/15/17         15,000        14,526        15,975
MGM Mirage, Inc.                                  10.375     05/15/14         30,000        29,203        32,025
MGM Mirage, Inc.                                  11.125     11/15/17         50,000        48,706        54,625
Markwest Energy Operating Co.                      6.875     11/01/14         35,000        27,653        32,725
Newpage Corporation                               11.375     12/31/14        375,000       367,074       365,625
Packaging Dynamics Corporation of America         10.000     05/01/16        975,000       969,680       441,187
Sealed Air Corporation                             7.875     06/15/17        500,000       492,132       527,245
Speedway Motorsports, Inc.                         8.750     06/01/16         35,000        33,932        36,400
Tunica-Biloxi Gaming Authority                     9.000     11/15/15        540,000       556,042       486,000
                                                                                      ------------  ------------
  TOTAL BONDS                                                                            5,461,867     4,847,147
                                                                                      ------------  ------------

CONVERTIBLE PREFERRED STOCK - 0.00%
ETEX Corporation (B)                                                             194           179          --
                                                                                      ------------  ------------
  TOTAL CONVERTIBLE PREFERRED STOCK                                                            179          --
                                                                                      ------------  ------------

PREFERRED STOCK - 0.00%
TherOX, Inc. (B)                                                                  26         1,032          --
                                                                                      ------------  ------------
  TOTAL PREFERRED STOCK                                                                      1,032          --
                                                                                      ------------  ------------

COMMON STOCK - 0.00%
Touchstone Health Partnership (B)                                                292         1,062          --
                                                                                      ------------  ------------
  TOTAL COMMON STOCK                                                                         1,062          --
                                                                                      ------------  ------------

  TOTAL RULE 144A SECURITIES                                                             5,464,140     4,847,147
                                                                                      ------------  ------------

TOTAL CORPORATE RESTRICTED SECURITIES                                                 $117,836,018  $100,634,812
                                                                                      ------------  ------------

----------------------------------------------------------------------------------------------------------------
                                                                                                              27


CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                  Interest     Due       Principal                     Market
CORPORATE PUBLIC SECURITIES - 14.48%:(A)            Rate       Date        Amount         Cost         Value
                                                  -------    --------   ------------  ------------  ------------
                                                                                     
BONDS - 13.51%
Allegheny Technologies, Inc.                       9.375%    06/12/19   $    500,000  $    522,147  $    566,085
Allied Waste NA                                    7.125     05/15/16        500,000       506,250       527,500
Aramark Corporation (C)                            3.983     02/01/15        100,000       100,000        86,750
Bunge Limited Finance Corporation                  8.500     06/15/19        500,000       512,170       576,415
C R H America, Inc.                                5.300     10/15/13        500,000       418,430       516,065
C V S Caremark Corporation                         5.750     06/01/17        500,000       407,380       535,252
Citigroup, Inc.                                    5.500     04/11/13        500,000       437,890       511,663
Comcast Corporation                                6.500     01/15/15        500,000       443,545       557,146
Corrections Corporation of America                 7.750     06/01/17         75,000        72,901        77,438
Cytec Industries, Inc.                             8.950     07/01/17        600,000       604,097       648,124
Denbury Resources, Inc.                            9.750     03/01/16         25,000        23,318        26,562
El Paso Corporation                               12.000     12/12/13         25,000        22,549        28,561
Electronic Data Systems Corporation                7.125     10/15/09        500,000       500,058       501,014
Gencorp, Inc.                                      9.500     08/15/13        130,000       130,000       104,000
Goldman Sachs Group, Inc.                          4.750     07/15/13        500,000       418,645       521,797
Goodyear Tire & Rubber Co.                        10.500     05/15/16         50,000        48,002        54,250
Inergy LP/Inergy Fin                               8.250     03/01/16         75,000        75,000        75,375
Intelsat Bermuda Ltd.                              9.250     06/15/16        690,000       714,782       677,925
International Game Technology                      7.500     06/15/19        500,000       499,720       554,075
Iron Mountain, Inc.                                8.750     07/15/18        500,000       513,135       520,000
Iron Mountain, Inc.                                8.375     07/15/18         20,000        19,925        20,675
Johnson Controls, Inc.                             5.500     01/15/16        500,000       398,125       517,940
Lubrizol Corporation                               8.875     02/01/19        500,000       496,280       617,191
Manitowoc Company, Inc.                            7.125     11/01/13        100,000       100,000        86,500
N R G Energy, Inc.                                 8.500     06/15/19        100,000        98,348       100,375
Nortek, Inc.                                      10.000     12/01/13        100,000        98,957       102,000
Owens Corning, Inc.                                9.000     06/15/19         30,000        29,516        32,400
Pliant Corporation (C)                            11.850     12/15/09        857,441       834,631       738,471
Quicksilver Resources, Inc.                        7.125     04/01/16        350,000       334,250       303,625
Rental Service Corporation                         9.500     12/01/14        175,000       175,734       168,875
Sheridan Acquisition Corporation                  10.250     08/15/11        225,000       222,001       189,000
Stewart & Stevenson LLC                           10.000     07/15/14        735,000       755,033       676,200
Teck Resources Ltd                                 9.750     05/15/14         25,000        23,895        27,500
Teck Resources Ltd                                10.250     05/15/16         40,000        37,952        45,200
Teck Resources Ltd                                10.750     05/15/19         30,000        28,508        34,875
Texas Industries, Inc.                             7.250     07/15/13         35,000        35,000        33,600

----------------------------------------------------------------------------------------------------------------
28


                                              MassMutual Participation Investors
CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                                         Shares or
                                                  Interest     Due       Principal                     Market
CORPORATE PUBLIC SECURITIES: (A) (Continued)        Rate       Date        Amount         Cost         Value
                                                  -------    --------   ------------  ------------  ------------
                                                                                     
The Valspar Corporation                            7.250%    06/15/19   $    500,000  $    501,547  $    541,980
Ticketmaster Entertainment, Inc.                  10.750     07/28/16        250,000       250,000       256,250
Titan International, Inc.                          8.000     01/15/12         70,000        70,000        67,725
Tube City IMS Corporation                          9.750     02/01/15      1,000,000       990,072       810,000
Tyco International Group SA                        8.500     01/15/19        125,000       124,996       151,859
Tyco International Group SA                        6.550     10/01/17        500,000       457,495       523,410
United Components, Inc.                            9.375     06/15/13        535,000       535,441       429,337
United Rentals, Inc.                               6.500     02/15/12        325,000       235,625       325,812
Vought Aircraft Industries                         8.000     07/15/11        650,000       647,540       643,500
                                                                                      ------------  ------------
  TOTAL BONDS                                                                           14,470,890    15,110,297
                                                                                      ------------  ------------

COMMON STOCK - 0.51%
A123 System, Inc.                                                                350         4,725         7,462
CKX, Inc. (B)                                                                 52,500       422,625       352,275
Directed Electronics, Inc. (B)                                               195,118       982,867        81,949
ITC^DeltaCom, Inc. (B)                                                        94,588       827,645       122,019
Intrepid Potash, Inc. (B)                                                        185         5,920         4,364
                                                                                      ------------  ------------
  TOTAL COMMON STOCK                                                                     2,243,782       568,069
                                                                                      ------------  ------------
CONVERTIBLE BONDS - 0.46%
Citadel Broadcasting Corporation                   4.000%    02/15/11   $    250,000       194,063        37,500
Transocean, Inc.                                   1.500     12/15/37        500,000       411,093       476,250
                                                                                      ------------  ------------
  TOTAL CONVERTIBLE BONDS                                                                  605,156       513,750
                                                                                      ------------  ------------

TOTAL CORPORATE PUBLIC SECURITIES                                                     $ 17,319,828  $ 16,192,116
                                                                                      ------------  ------------


TOTAL INVESTMENTS                                 104.47%                             $135,155,846  $116,826,928
                                                                                      ============  ------------
  Other Assets                                      6.99                                               7,819,552
  Liabilities                                     (11.46)                                            (12,812,616)
                                                  -------                                           ------------
TOTAL NET ASSETS                                  100.00%                                           $111,833,864
                                                  =======                                           ============
(A) In each of the convertible note, warrant, and common stock investments, the issuer has agreed to provide
    certain registration rights.
(B) Non-income producing security.
(C) Variable rate security; rate indicated is as of 09/30/09.
(D) Defaulted security; interest not accrued.
(E) Illiquid security. At September 30, 2009, the values of these securities amounted to $95,787,665 or 85.66%
    of net assets.
PIK - Payment-in-kind
----------------------------------------------------------------------------------------------------------------
                                                                                                              29


CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                 Fair Value/                                                            Fair Value/
INDUSTRY CLASSIFICATION:                        Market Value                                                           Market Value
                                               --------------                                                         --------------
                                                                                                             
AEROSPACE - 3.05%                                                      CHEMICAL, PLASTICS & RUBBER - 0.34%
Gencorp, Inc.                                  $      104,000          Capital Specialty Plastics, Inc.                      385,762
P A S Holdco LLC                                    1,776,509                                                         --------------
Visioneering, Inc.                                    880,987          CONSUMER PRODUCTS - 7.56%
Vought Aircraft Industries                            643,500          Aero Holdings, Inc.                                 1,877,851
                                               --------------          Bravo Sports Holding Corporation                    1,233,957
                                                    3,404,996          G F S I, Inc.                                         266,710
                                               --------------          K N B Holdings Corporation                          1,143,022
AUTOMOBILE - 3.98%                                                     Momentum Holding Co.                                  258,084
Goodyear Tire & Rubber Co.                             54,250          R A J Manufacturing Holdings LLC                    1,312,807
Jason, Inc.                                           255,094          Royal Baths Manufacturing Company                     542,790
Johnson Controls, Inc.                                517,940          The Tranzonic Companies                             1,819,405
Nyloncraft, Inc.                                      348,215          Walls Industries, Inc.                                   --
Ontario Drive & Gear Ltd.                             280,570                                                         --------------
Qualis Automotive LLC                               1,012,305                                                              8,454,626
Titan International, Inc.                              67,725                                                         --------------
Transtar Holding Company                            1,487,558          CONTAINERS, PACKAGING & GLASS - 4.41%
United Components, Inc.                               429,337          Flutes, Inc.                                          131,198
                                               --------------          Maverick Acquisition Company                          351,194
                                                    4,452,994          P I I Holding Corporation                           1,531,637
                                               --------------          Packaging Dynamics Corporation of America             441,187
BEVERAGE, DRUG & FOOD - 4.91%                                          Paradigm Packaging, Inc.                            1,213,151
Anheuser-Busch                                        591,630          Pliant Corporation                                    738,471
Aramark Corporation                                    86,750          Sealed Air Corporation                                527,245
Golden County Foods Holding, Inc.                     976,036          Vitex Packaging Group, Inc.                              --
Hospitality Mints Holding Company                   1,155,237                                                         --------------
Specialty Commodities, Inc.                         1,392,269                                                              4,934,083
Vitality Foodservice, Inc.                          1,285,414                                                         --------------
                                               --------------          DISTRIBUTION - 1.98%
                                                    5,487,336          Duncan Systems, Inc.                                  917,054
                                               --------------          FCX Holdings Corporation                            1,293,294
BROADCASTING & ENTERTAINMENT - 1.39%                                                                                  --------------
Citadel Broadcasting Corporation                       37,500                                                              2,210,348
CKX, Inc.                                             352,275                                                         --------------
Comcast Corporation                                   557,146
Speedway Motorsports, Inc.                             36,400
Workplace Media Holding Co.                           567,056
                                               --------------
                                                    1,550,377
                                               --------------
BUILDINGS & REAL ESTATE - 1.15%
K W P I Holdings Corporation                        1,098,278
Owens Corning, Inc.                                    32,400
Texas Industries, Inc.                                 33,600
TruStile Doors, Inc.                                  120,575
                                               --------------
                                                    1,284,853
                                               --------------


------------------------------------------------------------------------------------------------------------------------------------
30


                                              MassMutual Participation Investors
CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                 Fair Value/                                                            Fair Value/
INDUSTRY CLASSIFICATION:                        Market Value                                                           Market Value
                                               --------------                                                         --------------
                                                                                                             
DIVERSIFIED/CONGLOMERATE,                                              ELECTRONICS - 1.10%
MANUFACTURING - 8.61%                                                  A123 Systems, Inc.                             $        7,462
A H C Holdings Company, Inc.                   $    1,441,708          Connecticut Electric, Inc.                            633,694
Arrow Tru-Line Holdings, Inc.                         732,447          Directed Electronics, Inc.                             81,949
C D N T, Inc.                                         792,028          Electronic Data Systems Corporation                   501,014
Douglas Dynamics LLC                                  417,100                                                         --------------
K P I Holdings, Inc.                                  867,883                                                              1,224,119
MEGTEC Holdings, Inc.                               1,185,515                                                         --------------
Milwaukee Gear Company                              1,361,889          FARMING & AGRICULTURE - 1.92%
Nortek, Inc.                                          102,000          Bunge Limited Finance Corporation                     576,415
Northwest Mailing Services, Inc.                    1,391,230          Waggin' Train Holdings LLC                          1,565,381
Postle Aluminum Company LLC                           326,974                                                         --------------
Truck Bodies & Equipment International                390,310                                                              2,141,796
Xaloy Superior Holdings, Inc.                         614,870                                                         --------------
                                               --------------          FINANCIAL SERVICES - 0.92%
                                                    9,623,954          Citigroup, Inc.                                       511,663
                                               --------------          Goldman Sachs Group, Inc.                             521,797
DIVERSIFIED/CONGLOMERATE, SERVICE - 10.53%                             Highgate Capital LLC                                     --
ACCO Brands Corporation                                47,081                                                         --------------
A W X Holdings Corporation                            782,744                                                              1,033,460
Advanced Technologies Holdings                      1,411,154                                                         --------------
Affinia Group, Inc.                                    26,813          HEALTHCARE, EDUCATION & CHILDCARE - 6.06%
Apex Analytix Holding Corporation                   1,042,898          A T I Acquisition Company                           2,657,793
C R H America, Inc.                                   516,065          American Hospice Management Holding LLC             2,060,165
Clough, Harbour and Associates                      1,447,967          F H S Holdings LLC                                    632,813
Corrections Corporation of America                     77,438          H C A, Inc.                                            15,975
Crane Rental Corporation                            1,387,692          Synteract Holdings Corporation                      1,415,150
Diversco, Inc./DHI Holdings, Inc.                     659,713          Touchstone Health Partnership                            --
Dwyer Group, Inc.                                     782,926                                                         --------------
Fowler Holding, Inc.                                     --                                                                6,781,896
Insurance Claims Management, Inc.                      78,053                                                         --------------
Iron Mountain, Inc.                                   540,675          HOME & OFFICE FURNISHINGS, HOUSEWARES,
Mail Communications Group, Inc.                       716,312          AND DURABLE CONSUMER PRODUCTS - 9.59%
Nesco Holdings Corporation                          1,580,506          Connor Sport Court International, Inc.              1,371,094
Pearlman Enterprises, Inc.                               --            H M Holding Company                                      --
Tyco International Group                              675,269          Home Decor Holding Company                          1,192,207
                                               --------------          Justrite Manufacturing Acquisition Co.                940,748
                                                   11,773,306          K H O F Holdings, Inc.                              1,396,640
                                               --------------          Monessen Holding Corporation                        1,367,894
                                                                       Stanton Carpet Holding Co.                          1,122,450
                                                                       Transpac Holdings Company                             797,853
                                                                       U M A Enterprises, Inc.                               915,537
                                                                       U-Line Corporation                                    847,025
                                                                       Wellborn Forest Holding Co.                           774,563
                                                                                                                      --------------
                                                                                                                          10,726,011
                                                                                                                      --------------

------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                                  31


CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                 Fair Value/                                                            Fair Value/
INDUSTRY CLASSIFICATION:                        Market Value                                                           Market Value
                                               --------------                                                         --------------
                                                                                                             
LEISURE, AMUSEMENT, ENTERTAINMENT - 2.56%                              NATURAL RESOURCES - 2.17%
International Game Technology                  $      554,075          Appleton Papers, Inc.                          $      204,841
MGM Mirage, Inc.                                       86,650          Cenveo Corporation                                     42,300
Savage Sports Holding, Inc.                         1,477,427          Cytec Industries, Inc.                                648,124
Ticketmaster Entertainment, Inc.                      256,250          Intrepid Potash, Inc.                                   4,364
Tunica-Biloxi Gaming Authority                        486,000          Lubrizol Corporation                                  617,191
                                               --------------          Newpage Corporation                                   365,625
                                                    2,860,402          The Valspar Corporation                               541,980
                                               --------------                                                         --------------
MACHINERY - 9.88%                                                                                                          2,424,425
A S A P Industries LLC                                689,309                                                         --------------
Davis-Standard LLC                                  1,606,776          OIL & GAS - 2.61%
E S P Holdco, Inc.                                  1,240,149          Denbury Resources, Inc.                                26,562
Integration Technology Systems, Inc.                     --            International Offshore Services LLC                 1,390,516
K-Tek Holdings Corporation                          1,468,372          Quicksilver Resources, Inc.                           303,625
M V I Holding, Inc.                                   730,112          Total E & S, Inc.                                     718,641
Manitowoc Company, Inc.                                86,500          Transocean, Inc.                                      476,250
Navis Global                                          154,446                                                         --------------
NetShape Technologies, Inc.                           639,623                                                              2,915,594
Pacific Consolidated Holdings LLC                     675,760                                                         --------------
Power Services Holding Company                      1,425,739          PHARMACEUTICALS - 1.29%
R E I Delaware Holding, Inc.                        1,396,183          CorePharma LLC                                      1,445,669
Safety Speed Cut Manufacturing Company, Inc.          264,562                                                         --------------
Stewart & Stevenson LLC                               676,200          PUBLISHING/PRINTING - 0.24%
                                               --------------          Gannett Company, Inc.                                  83,300
                                                   11,053,731          Sheridan Acquisition Corporation                      189,000
                                               --------------                                                         --------------
MEDICAL DEVICES/BIOTECH - 3.76%                                                                                              272,300
Coeur, Inc.                                           692,684                                                         --------------
E X C Acquisition Corporation                         140,506          RETAIL STORES - 1.02%
ETEX Corporation                                         --            CVS Caremark Corporation                              535,252
MedSystems Holdings LLC                               739,150          Olympic Sales, Inc.                                   113,273
MicroGroup, Inc.                                    1,896,515          Rental Service Corporation                            168,875
OakRiver Technology, Inc.                             731,807          United Rentals, Inc.                                  325,812
TherOX, Inc.                                             --                                                           --------------
                                               --------------                                                              1,143,212
                                                    4,200,662                                                         --------------
                                               --------------          TECHNOLOGY - 2.69%
MINING, STEEL, IRON & NON PRECIOUS                                     Compucom Systems, Inc.                                624,775
METALS - 2.57%                                                         Sencore Holding Company                               870,543
Allegheny Technology, Inc.                            566,085          Smart Source Holdings LLC                           1,518,425
T H I Acquisition, Inc.                             1,389,699                                                         --------------
Teck Cominco, Ltd.                                    107,575                                                              3,013,743
Tube City IMS Corporation                             810,000                                                         --------------
                                                    2,873,359

------------------------------------------------------------------------------------------------------------------------------------
32


                                              MassMutual Participation Investors
CONSOLIDATED SCHEDULE OF INVESTMENTS (CONTINUED)
September 30, 2009
(Unaudited)

                                                 Fair Value/                                                            Fair Value/
INDUSTRY CLASSIFICATION:                        Market Value                                                           Market Value
                                               --------------                                                         --------------
                                                                                                             
TELECOMMUNICATIONS - 2.93%                                             WASTE MANAGEMENT / POLLUTION - 2.54%
All Current Holding Company                    $      736,118          Allied Waste NA                                $      527,500
Intelsat Bermuda Ltd.                                 677,925          Terra Renewal LLC                                   1,306,925
ITC^DeltaCom, Inc.                                    122,019          Torrent Group Holdings, Inc.                        1,007,561
Telecorps Holdings, Inc.                            1,737,701                                                         --------------
                                               --------------                                                              2,841,986
                                                    3,273,763                                                         --------------
                                               --------------
TRANSPORTATION - 2.01%
NABCO, Inc.                                           323,769
Tangent Rail Corporation                            1,926,570          TOTAL INVESTMENTS - 104.47%                    $  116,826,928
                                               --------------                                                         ==============
                                                    2,250,339
                                               --------------
UTILITIES - 0.70%
Allegheny Energy Supply                               550,790
El Paso Corporation                                    28,561
Inergy LP                                              75,375
Markwest Energy Operating Co.                          32,725
N R G Energy, Inc.                                    100,375
                                               --------------
                                                      787,826
                                               --------------












See Notes to Consolidated Financial Statements
------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                                  33


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(UNAUDITED)


1. HISTORY

   MassMutual Participation Investors (the "Trust") was organized as a
   Massachusetts business trust under the laws of the Commonwealth of
   Massachusetts pursuant to a Declaration of Trust dated April 7, 1988.

   The Trust is a diversified closed-end management investment company. Babson
   Capital Management LLC ("Babson Capital"), a wholly-owned indirect subsidiary
   of Massachusetts Mutual Life Insurance Company ("MassMutual"), acts as its
   investment adviser. The Trust's investment objective is to maximize total
   return by providing a high level of current income, the potential for growth
   of income, and capital appreciation. The Trust's principal investments are
   privately placed, below-investment grade, long-term debt obligations
   purchased directly from their issuers, which tend to be smaller companies. At
   least half of these investments normally include equity features such as
   common stock, warrants, conversion rights, or other equity features that
   provide the Trust with the opportunity to realize capital gains. The Trust
   will also invest in publicly traded debt securities (including high yield
   securities), again with an emphasis on those with equity features, and in
   convertible preferred stocks and, subject to certain limitations, readily
   marketable equity securities. Below-investment grade or high yield securities
   have predominantly speculative characteristics with respect to the capacity
   of the issuer to pay interest and repay capital. In addition, the Trust may
   temporarily invest in high quality, readily marketable securities.

   On January 27, 1998, the Board of Trustees authorized the formation of a
   wholly owned subsidiary of the Trust ("MMPI Subsidiary Trust") for the
   purpose of holding certain investments. The results of the MMPI Subsidiary
   Trust are consolidated in the accompanying financial statements. Footnote 2.D
   below discusses the federal tax consequences of the MMPI Subsidiary Trust.

2. SIGNIFICANT ACCOUNTING POLICIES

   The following is a summary of significant accounting policies followed
   consistently by the Trust in the preparation of its consolidated financial
   statements in conformity with accounting principles generally accepted in the
   United States of America.

   A. VALUATION OF INVESTMENTS:

   Valuation of a security in the Trust's portfolio is made on the basis of the
   market price whenever market quotations are readily available and all
   securities of the same class held by the Trust can be readily sold in such
   market.

   Nearly all securities which are acquired by the Trust directly from the
   issuers and shares into which such securities may be converted or which may
   be purchased on the exercise of warrants attached to such securities will be
   subject to legal or contractual delays in, or restrictions on, resale and
   will therefore be "restricted securities." Generally speaking, as contrasted
   with open-market sales of unrestricted securities, which may be effected
   immediately if the market is adequate, restricted securities can be sold only
   in a public offering for which a registration statement is in effect under
   the Securities Act of 1933, as amended (the "1933 Act") or pursuant to a
   transaction that is exempt from registration under the 1933 Act.

   The value of restricted securities, and of any other assets for which there
   are no reliable market quotations, is the fair value as determined in good
   faith by the Trust's Board of Trustees (the "Trustees"). Each restricted
   security is valued by the Trustees at the time of its acquisition and at
   least quarterly thereafter. The Trustees have established guidelines to aid
   in the valuation of each security. Generally, restricted securities are
   initially valued at cost or less at the time of acquisition by the Trust.
   Values greater or less than cost are used thereafter for restricted
   securities in appropriate circumstances. Among the factors ordinarily
   considered are the existence of restrictions upon the sale of a security held
   by the Trust; an estimate of the existence and the extent of a market for the
   security; the extent of any discount at which the security was acquired; the
   estimated period of time during which the security will not be freely
   marketable; the estimated expenses of registering or otherwise qualifying the
   security for public sale; estimated underwriting commissions if underwriting
   would be required to effect a sale; in the case of a convertible security,
   whether or not it would trade on the basis of its stock equivalent; in the
   case of a debt obligation which would trade independently of any equity
   equivalent, the current yields on comparable securities; the estimated amount
   of the floating supply of such securities available for purchase; the
   proportion of the issue held by the Trust; changes in the financial condition
   and prospects of the issuer; the existence of merger proposals or tender
   offers affecting the issuer; and any other factors affecting fair value, all
   in accordance with the Investment Company Act of 1940, as amended (the "1940
   Act"). In making valuations, opinions of counsel may be relied upon as to
   whether or not securities are restricted securities and as to the legal
   requirements for public sale.

   When market quotations are readily available for unrestricted securities of
   an issuer, restricted securities of the same class are generally valued at a
   discount from the market price of such unrestricted securities. The Trustees,
   however, consider all factors in fixing any discount, including the filing of
   a registration statement for such securities under the 1933 Act and any other
   developments which are likely to increase the probability that the securities
   may be publicly sold by the Trust without restriction.

   The Trustees meet at least once each quarter to approve the value of the
   Trust's portfolio securities as of the close of business on the last business
   day of the preceding quarter. This valuation requires the approval of a
   majority of the Trustees of the Trust, including a majority of the Trustees
   who are not interested persons of the Trust or of Babson Capital. In making
   valuations,

--------------------------------------------------------------------------------
34

                                              MassMutual Participation Investors
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(CONTINUED)
(UNAUDITED)

   the Trustees will consider reports by Babson Capital analyzing each portfolio
   security in accordance with the relevant factors referred to above. Babson
   Capital has agreed to provide such reports to the Trust at least quarterly.

   The consolidated financial statements include private placement restricted
   securities valued at $95,787,665 (85.66% of net assets) as of September 30,
   2009 whose values have been estimated by the Trustees in the absence of
   readily ascertainable market values. Due to the inherent uncertainty of
   valuation, those estimated values may differ significantly from the values
   that would have been used had a ready market for the securities existed, and
   the differences could be material.

   The values for Rule 144A restricted securities and corporate public
   securities are stated at the last reported sales price or at prices based
   upon quotations obtained from brokers and dealers as of September 30, 2009,
   subject to discount where appropriate, and are approved by the Trustees.
   Short-term securities with more than sixty days to maturity are valued at
   fair value and short-term securities having a maturity of sixty days or less
   are valued at amortized cost, which approximates market value.

   Effective January 1, 2008, the Trust adopted FASB Statement of Financial
   Accounting Standards No. 157, "Fair Value Measurements" ("FAS 157"). FAS 157
   clarifies the definition of fair value, establishes a framework for measuring
   fair values and requires additional disclosures about the use of fair value
   measurements. FAS 157 requires companies to provide expanded information
   about the assets and liabilities measured at fair value and the potential
   effect of these fair valuations on an entity's financial performance.

   Various inputs are used in determining the value of the Trust's investments.
   Using the hierarchy established under FAS 157, these inputs are summarized in
   the three broad levels listed below:

          Level 1: quoted prices in active markets for identical securities

          Level 2: other significant observable inputs (including quoted prices
          for similar securities, interest rates, prepayments speeds, credit
          risk, etc.)

          Level 3: significant unobservable inputs (including the Trust's own
          assumptions in determining the fair value of investments)

   The inputs and methodology used for valuing securities are not necessarily an
   indication of the risk associated with investing in those securities.

   The following is a summary of the inputs used to value the Trust's net assets
   as of September 30, 2009:

   ASSETS                     TOTAL        LEVEL 1      LEVEL 2       LEVEL 3
   -----------------------------------------------------------------------------
   Restricted Securities  $100,634,812     $    --    $ 4,847,147   $95,787,665

   Public Securities        16,192,116      568,069    15,624,047           --
   -----------------------------------------------------------------------------
   TOTAL                  $116,826,928     $568,069   $20,471,194   $95,787,665

   Following is a reconciliation of Level 3 assets for which significant
   unobservable inputs were used to determine fair value:

                          RESTRICTED       PUBLIC      SHORT-TERM
   ASSETS                 SECURITIES     SECURITIES    SECURITIES      TOTAL
   -----------------------------------------------------------------------------
   Beginning balance
   at 12/31/2008         $97,424,749     $    --         $    --    $97,424,749

   Total gains or losses
   (realized/unrealized)
   included in earnings*  (6,719,713)         --              --     (6,719,713)

   Purchases, sales,
   issuances &
   settlements (net)       5,082,629          --              --      5,082,629

   Transfers in and /
   or out of Level 3             --           --              --            --
   -----------------------------------------------------------------------------
   ENDING BALANCE
   AT 09/30/2009         $95,787,665     $    --          $   --    $95,787,665

   *The amount of net losses for the period included in earnings attributable to
   the change in unrealized gains or losses relating to Level 3 assets still
   held at 09/30/09 is $(5,692,959).

   B. ACCOUNTING FOR INVESTMENTS:

   Investment transactions are accounted for on the trade date. Dividend income
   is recorded on the ex-dividend date. Interest income is recorded on the
   accrual basis, including the amortization of premiums and accretion of
   discounts on bonds held using the yield-to-maturity method. The Trust does
   not accrue income when payment is delinquent and when management believes
   payment is questionable.

   Realized gains and losses on investment transactions and unrealized
   appreciation and depreciation of investments are reported for financial
   statement and federal income tax purposes on the identified cost method.

   C. USE OF ESTIMATES:

   The preparation of financial statements in conformity with accounting
   principles generally accepted in the United States of America requires
   management to make estimates and assumptions that affect the reported amounts
   of assets and liabilities and disclosure of contingent assets and liabilities
   at the date of the financial statements and the reported amounts of revenues
   and expenses during the reporting period. Actual results could differ from
   those estimates.

--------------------------------------------------------------------------------
                                                                              35


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
(UNAUDITED)

   D. FEDERAL INCOME TAXES:

   The Trust has elected to be taxed as a "regulated investment company" under
   the Internal Revenue Code, and intends to maintain this qualification and to
   distribute substantially all of its net taxable income to its shareholders.
   In any year when net long-term capital gains are realized by the Trust,
   management, after evaluating the prevailing economic conditions, will
   recommend that Trustees either designate the net realized longterm gains as
   undistributed and pay the federal capital gains taxes thereon, or distribute
   all or a portion of such net gains.

   The Trust is taxed as a regulated investment company and is therefore limited
   as to the amount of non-qualified income that it may receive as the result of
   operating a trade or business, e.g. the Trust's PRO RATA share of income
   allocable to the Trust by a partnership operating company. The Trust's
   violation of this limitation could result in the loss of its status as a
   regulated investment company, thereby subjecting all of its net income and
   capital gains to corporate taxes prior to distribution to its shareholders.
   The Trust, from time-to-time, identifies investment opportunities in the
   securities of entities that could cause such trade or business income to be
   allocable to the Trust. The MMPI Subsidiary Trust (described in Footnote 1,
   above) was formed in order to allow investment in such securities without
   adversely affecting the Trust's status as a regulated investment company.

   The MMPI Subsidiary Trust is not taxed as a regulated investment company.
   Accordingly, prior to the Trust receiving any distributions from the MMPI
   Subsidiary Trust, all of the MMPI Subsidiary Trust's taxable income and
   realized gains, including non-qualified income and realized gains, is subject
   to taxation at prevailing corporate tax rates. For the nine months ended
   September 30, 2009, the MMPI Subsidiary Trust has not accrued any income tax
   expense.

   In June 2006, the Financial Accounting Standards Board ("FASB") issued FASB
   Interpretation No. 48, ACCOUNTING FOR UNCERTAINTY IN INCOME TAXES - AN
   INTERPRETATION OF FASB STATEMENT NO. 109 ("FIN 48"). Management has analyzed
   the Trust's tax positions taken on federal income tax returns for all open
   tax years and has concluded that as of September 30, 2009, no provision for
   income tax would be required in the Trust's financial statements. The Trust's
   federal and state income and federal excise tax returns for tax years for
   which the applicable statutes of limitations have not expired are subject to
   examination by the Internal Revenue Service and state departments of revenue.

   E. DISTRIBUTIONS TO SHAREHOLDERS:

   The Trust records distributions to shareholders from net investment income
   and net realized gains, if any, on the exdividend date. The Trust's net
   investment income dividend is declared four times per year, in April, July,
   October, and December. The Trust's net realized capital gain distribution, if
   any, is declared in December.

   F. EXPENSE REDUCTION:

   Citibank, N.A. ("Citibank") serves as custodian to the Trust. Pursuant to the
   custodian agreement, Citibank receives a fee reduced by credits on cash
   balances the Trust maintains with Citibank. All credit balances, if any, used
   to reduce the Trust's custodian fees are reported as fees paid indirectly on
   the Statement of Operations. For the nine months ended September 30, 2009,
   there were no credit balances used to reduce custodian fees.

3. INVESTMENT ADVISORY AND ADMINISTRATIVE SERVICES CONTRACT

   A. SERVICES:

   Under an Investment Advisory and Administrative Services Contract (the
   "Contract") with the Trust, Babson Capital has agreed to use its best efforts
   to present to the Trust a continuing and suitable investment program
   consistent with the investment objectives and policies of the Trust. Babson
   Capital represents the Trust in any negotiations with issuers, investment
   banking firms, securities brokers or dealers and other institutions or
   investors relating to the Trust's investments. Under the Contract, Babson
   Capital also provides administration of the day-to-day operations of the
   Trust and provides the Trust with office space and office equipment,
   accounting and bookkeeping services, and necessary executive, clerical and
   secretarial personnel for the performance of the foregoing services.

   B. FEE:

   For its services under the Contract, Babson Capital is paid a quarterly
   investment advisory fee equal to .225% of the value of the Trust's net assets
   as of the last business day of each fiscal quarter, an amount approximately
   equivalent to .90% on an annual basis. A majority of the Trustees, including
   a majority of the Trustees who are not interested persons of the Trust or of
   Babson Capital, approve the valuation of the Trust's net assets as of such
   day.

4. SENIOR SECURED INDEBTEDNESS

   MassMutual holds the Trust's $12,000,000 Senior Fixed Rate Convertible Note
   (the "Note") issued by the Trust in 1995. The Note, as amended, is due
   December 13, 2011 and accrues interest at 5.80% per annum. MassMutual, at its
   option, can convert the principal amount of the Note into common shares. The
   dollar amount of principal would be converted into an equivalent dollar
   amount of common shares based upon the average price of the common shares for
   ten business days prior to the notice of conversion. For the nine months
   ended September 30, 2009, the Trust incurred total interest expense on the
   Note of $522,000.

   The Trust may redeem the Note, in whole or in part, at the principal amount
   proposed to be redeemed together with the accrued and unpaid interest thereon
   through the redemption date plus a Make Whole Premium. The Make Whole Premium
   equals the excess of (i) the present value of the scheduled

--------------------------------------------------------------------------------
36

                                              MassMutual Participation Investors
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(CONTINUED)
(UNAUDITED)

payments of principal and interest which the Trust would
have paid but for the proposed redemption, discounted at the
rate of interest of U.S. Treasury obligations whose maturity
approximates that of the Note plus 0.50% over (ii) the
principal of the Note proposed to be redeemed.

5. PURCHASES AND SALES OF INVESTMENTS

                                                  FOR THE NINE
                                                  MONTHS ENDED
                                                   09/30/2009

                                                             PROCEEDS
                                             COST OF           FROM
                                           INVESTMENTS       SALES OR
                                             ACQUIRED       MATURITIES
                                           ---------------------------
   Corporate restricted securities         $11,090,241     $ 5,155,659

   Corporate public securities               6,119,767      10,148,345

   The aggregate cost of investments is substantially the same for financial
   reporting and federal income tax purposes as of September 30, 2009. The net
   unrealized depreciation of investments for financial reporting and federal
   tax purposes as of September 30, 2009 is $18,328,918 and consists of
   $11,382,396 appreciation and $29,711,314 depreciation.

6. QUARTERLY RESULTS OF INVESTMENT OPERATIONS

                                                 MARCH 31, 2009
                                             AMOUNT           PER SHARE
                                             ------           ---------
   Investment income                      $ 3,196,335
   Net investment income                    2,655,746          $ 0.268
   Net realized and unrealized
    loss on investments (net of taxes)     (7,386,587)          (0.744)

                                                  JUNE 30, 2009
                                             AMOUNT           PER SHARE
                                             ------           ---------
   Investment income                      $ 2,895,878
   Net investment income                    2,319,080          $ 0.233
   Net realized and unrealized
    gain on investments (net of taxes)      4,384,624            0.450

                                               SEPTEMBER 30, 2009
                                             AMOUNT           PER SHARE
                                             ------           ---------
   Investment income                      $ 2,979,401
   Net investment income                    2,431,337          $ 0.441
   Net realized and unrealized
    gain on investments (net of taxes)      1,812,725            0.183

--------------------------------------------------------------------------------
                                                                              37


















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MEMBERS OF THE BOARD OF
TRUSTEES

Donald Glickman

Robert E. Joyal

William J. Barrett

Michael H. Brown*

Donald E. Benson*

Dr. Corine T. Norgaard*

Clifford M. Noreen

Martin T. Hart

Maleyne M. Syracuse

*Member of the Audit Committee

OFFICERS

Clifford M. Noreen
Chairman

Michael L. Klofas
President

James M. Roy
Vice President & Chief
Financial Officer

Patricia J. Walsh
Vice President, Secretary
& Chief Legal Officer

Jill A. Fields
Vice President

Michael P. Hermsen
Vice President

Mary Wilson Kibbe
Vice President

Richard E. Spencer, II
Vice President

Daniel J. Florence
Treasurer

John T. Davitt, Jr.
Comptroller

Melissa M. LaGrant
Chief Compliance Officer
--------------------------------------------------------------------------------

                                              MassMutual Participation Investors


DIVIDEND REINVESTMENT AND CASH PURCHASE PLAN

MassMutual Participation Investors offers a Dividend Reinvestment and Cash
Purchase Plan. The Plan provides a simple and automatic way for shareholders to
add to their holdings in the Trust through the receipt of dividend shares issued
by the Trust or through the reinvestment of cash dividends in Trust shares
purchased in the open market. The dividends of each shareholder will be
automatically reinvested in the Trust by Shareholder Financial Services Inc.,
the Transfer Agent, in accordance with the Plan, unless such shareholder elects
not to participate by providing written notice to the Transfer Agent. A
shareholder may terminate his or her participation by notifying the Transfer
Agent in writing.

Participating shareholders may also make additional contributions to the Plan
from their own funds. Such contributions may be made by personal check or other
means in an amount not less than $100 nor more than $5,000 per quarter. Cash
contributions must be received by the Transfer Agent at least five days (but no
more then 30 days) before the payment date of a dividend or distributions.

Whenever the Trust declares a dividend payable in cash or shares, the Transfer
Agent, acting on behalf of each participating shareholder, will take the
dividend in shares only if the net asset value is lower than the market price
plus an estimated brokerage commission as of the close of business on the
valuation day. The valuation day is the last day preceding the day of dividend
payment. When the dividend is to be taken in shares, the number of shares to be
received is determined by dividing the cash dividend by the net asset value as
of the close of business on the valuation date or, if greater than net asset
value, 95% of the closing share price. If the net asset value of the shares is
higher than the market value plus an estimated commission, the Transfer Agent,
consistent with obtaining the best price and execution, will buy shares on the
open market at current prices promptly after the dividend payment date.

The reinvestment of dividends does not, in anyway, relieve participating
shareholders of any federal, state or local tax. For federal income tax
purposes, the amount reportable in respect of a dividend received in
newly-issued shares of the Trust will be the fair market value of the shares
received, which will be reportable as ordinary income and/or capital gains.

As compensation for its services, the Transfer Agent receives a fee of 5% of any
dividend and cash contribution (in no event in excess of $2.50 per distribution
per shareholder.)

Any questions regarding the Plan should be addressed to Shareholder Financial
Services, Inc., Agent for MassMutual Participation Investors' Dividend
Reinvestment and Cash Purchase Plan, P.O. Box 173673, Denver, CO 80217-3673.



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       Participation Investors


























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