UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM N-CSR CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-5531 --------------------------------------------- MassMutual Participation Investors -------------------------------------------------------------------------------- (Exact name of registrant as specified in charter) 1500 Main Street, Suite 600, Springfield, MA 01115 -------------------------------------------------------------------------------- (Address of principal executive offices) (Zip code) Stephen L. Kuhn, Vice President and Secretary 1500 Main Street, Suite 2800, Springfield, MA 01115 -------------------------------------------------------------------------------- (Name and address of agent for service) Registrant's telephone number, including area code: 413-226-1000 ---------------------------- Date of fiscal year end: 12/31 ------------------ Date of reporting period: 12/31/05 ------------------ Form N-CSR is to be used by management investment companies to file reports with the Commission not later than 10 days after the transmission to stockholders of any report that is required to be transmitted to stockholders under Rule 30e-1 under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may use the information provided on Form N-CSR in its regulatory, disclosure review, inspection and policymaking roles. A registrant is required to disclose the information specified by Form N-CSR, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-CSR unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. ss. 3507. ITEM 1. REPORT TO STOCKHOLDERS. Attached hereto is the annual shareholder report transmitted to shareholders pursuant to Rule 30e-1 of the Investment Company Act of 1940, as amended. ================================================================================ 2005 Annual Report [LOGO] MassMutual Participation Investors ================================================================================ MassMutual Participation Investors MASSMUTUAL PARTICIPATION INVESTORS c/o Babson Capital Management LLC 1500 Main Street, Suite 600 Springfield, Massachusetts 01115 (413) 226-1516 http://www.babsoncapital.com/mpv ADVISER Babson Capital Management LLC 1500 Main Street Springfield, Massachusetts 01115 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 ------ MPV Listed NYSE ------ PROXY VOTING POLICIES & PROCEDURES; PROXY VOTING RECORD The Trustees of MassMutual Participation Investors have delegated proxy voting responsibilities relating to the voting of securities held by the Trust to Babson Capital Management LLC. 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 MassMutual Participation Investors' website: http://www. babsoncapital.com/mpv; and (3) on the U.S. Securities and Exchange Commission ("SEC") 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 MassMutual Participation Investors' website: http://www.babsoncapital.com/mpv; and (2) on the SEC's website at http://www.sec.gov. FORM N-Q MassMutual Participation Investors files its complete schedule of portfolio holdings with the U.S. Securities and Exchange Commission for the first and third quarters of each fiscal year on Form N-Q. This information is available (i) on the U.S. Securities and Exchange Commission's website at http://www.sec.gov; and (ii) at the U.S. Securities and Exchange Commission'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. MASSMUTUAL PARTICIPATION INVESTORS MassMutual Participation Investors is a closed-end investment company, first offered to the public over a decade ago, whose shares are traded on the New York Stock Exchange. MassMutual Participation Investors INVESTMENT OBJECTIVE & POLICY MassMutual Participation Investors (the "Trust") is a closed-end 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 either 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 corporate 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 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. 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 quarterly 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. In this report you will find a complete listing of the Trust's holdings. We encourage you to read this section carefully for a better under-standing of the Trust. We cordially invite all shareholders to attend the Trust's Annual Meeting of Shareholders, which will be held on April 21, 2006 at 1:00 P.M. in Springfield, Massachusetts. -------------------------------------------------------------------------------- Portfolio Composition as of 12/31/05* -------------------------------------------------------------------------------- [PIE CHART APPEARS HERE] Private/Restricted Equity 14% Cash & Short Term Investments 13% Public Investment Grade Debt 1% Public High Yield Debt 28% Public Equity 3% Private High Yield Debt 40% Private Investment Grade Debt 1% *BASED ON VALUE OF TOTAL INVESTMENTS 1 MassMutual Participation Investors To Our Shareholders As the Trust announced in July, Stuart H. Reese stepped down as a Trustee and Chairman of the Board of Trustees as a result of his new position as President and CEO of Massachusetts Mutual Life Insurance Company ("MassMutual"). Roger W. Crandall, the Trust's former President, was appointed as a Trustee and elected to replace Mr. Reese as Chairman of the Board of Trustees. Additionally, I was elected to succeed Mr. Crandall as President of the Trust. I am pleased to share with you the Trust's Annual Report for the year ended December 31, 2005. We cordially invite all shareholders to attend the MassMutual Participation Investors Annual Meeting of Shareholders, which will be held on April 21, 2006 at 1:00 P.M. in Springfield, Massachusetts. [PHOTO OF PRESIDENT AND CHAIRMAN APPEARS HERE] LEFT TO RIGHT: Clifford M. Noreen PRESIDENT Roger W. Crandall CHAIRMAN 2 MassMutual Participation Investors -------------------------------------------------------------------------------- Total Annual Portfolio Return (as of 12/31 each year)* -------------------------------------------------------------------------------- [BAR CHART APPEARS HERE] Lehman Brothers Intermediate Standard & Poor's U.S. Credit Index MassMutual Participation Industrials Composite (Formerly called the Investors (Based on change (Formerly called the Lehman Brothers in the net asset value Standard & Poor's Intermediate with reinvested dividends) Industrial Price Index) Corporate Bond Index) 2005 22.51% 2005 3.98% 2005 1.42 2004 25.14% 2004 10.20% 2004 4.08 2003 23.72% 2003 28.34% 2003 6.91 2002 5.70% 2002 -23.51% 2002 10.14 2001 3.41% 2001 -11.67% 2001 9.77 2000 8.11% 2000 -16.26% 2000 9.46 1999 4.77% 1999 25.89% 1999 0.16 1998 10.91% 1998 33.77% 1998 8.29 1997 24.10% 1997 31.04% 1997 8.36 1996 14.60% 1996 23.03% 1996 3.97 *DATA FOR MASSMUTUAL PARTICIPATION INVESTORS (THE "TRUST") 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 MARKET VALUE DUE TO THE DIFFERENCE BETWEEN THE TRUST'S NET ASSET VALUE AND THE MARKET VALUE OF ITS SHARES OUTSTANDING (SEE PAGE 12 FOR TOTAL INVESTMENT RETURN BASED ON MARKET VALUE); PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. [PHOTO OF OFFICERS APPEARS HERE] LEFT TO RIGHT: James M. Roy VICE PRESIDENT & CHIEF FINANCIAL OFFICER Stephen L. Kuhn VICE PRESIDENT, SECRETARY & CHIEF LEGAL OFFICER 3 MassMutual Participation Investors THE TRUST'S 2005 PORTFOLIO PERFORMANCE The Trust's total portfolio rate of return for 2005 was 22.51%, as measured by the change in net asset value, assuming the reinvestment of all dividends and distributions. The Trust's total net assets were $119,018,966, or $12.21 per share, as of December 31, 2005, compared to $107,610,007, or $11.13 per share, as of December 31, 2004. The Trust paid a quarterly dividend of 24 cents per share each quarter in 2005, with the fourth quarter dividend paid in January 2006. In addition, the Trust declared a special year-end dividend of 5 cents per share paid in January 2006 to shareholders of record on December 30, 2005, bringing total dividends for the year to $1.01. All in all, we are very pleased with the Trust's 2005 portfolio performance. The table shown below lists the average annual net returns of the Trust's portfolio, based on the change in net assets, assuming the reinvestment of all dividends and distributions, compared to the average annual returns of selected equity and fixed income market indices for the 1, 3, 5, and 10 years ended December 31, 2005. The U.S. economy and investment markets weathered the storms - both literally and figuratively - of 2005, as the economy remained healthy despite dramatic events. The most devastating hurricane in U.S. history - Katrina - caused oil prices to spike to over $70 a barrel in August before settling back to $60 by December; natural gas prices are also up. Short-term interest rates were raised eight times during the year by the Federal Reserve Board (the "Fed") for a total increase of 2 percent. Lehman Lehman Standard Brothers Brothers & Poor's The U.S. Corporate Intermediate Industrials Russell Trust High Yield Index U.S. Credit Index* Composite** 2000 Index -------------------------------------------------------------------------------- 1 Year 22.51% 2.74% 1.42% 3.98% 4.55% 3 Year 23.79% 13.77% 4.11% 13.72% 22.13% 5 Year 15.70% 8.85% 6.41% -0.14% 8.22% 10 Year 13.99% 6.54% 6.20% 8.47% 9.26% PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. * FORMERLY CALLED THE LEHMAN BROTHERS INTERMEDIATE CORPORATE BOND INDEX. ** FORMERLY CALLED THE STANDARD & POOR'S INDUSTRIAL PRICE INDEX. 4 MassMutual Participation Investors While historically events such as these have had a negative economic impact, indications are that the U.S. economy remains strong and is improving. The unemployment rate in 2005 dropped to 5 percent from 5.4 percent the previous year. Core inflation is about 2 percent and the value of the dollar versus several other currencies improved after three years of decline. U.S. Gross Domestic Product has grown at an annualized rate of more than 4 percent during the past two years. Investors continue to witness a strong corporate-credit market in 2005. Corporate credit defaults around the globe continued their downward trend for the fourth consecutive year, as reported by Moody's Investors Service. Moody's global issuer-weighted speculative-grade default rate finished the year at 1.9 percent, down from 2.3 percent in 2004 and its lowest level since 1997. Moody's expects the default rate to climb this year, but still stay below the rate's historical annual average of 4.9 percent. Overall, the Trust closed 13 new private placement transactions during 2005 and invested additional capital in three existing private placement investments, fewer than in 2004 but consistent with activity of prior years. New private placement transactions during the year were: AmerCable, Inc.; Arrow Tru-Line Holdings, Inc.; C & J Spec-Rent MITTED] Services, Inc.; Connor Sport Court International, Inc.; Consolidated Foundries Holdings; CorePharma LLC; ITC^DeltaCom, Inc.; MicroGroup, Inc.; O R S Nasco Holding, Inc.; Tangent Rail Corporation; Terra Renewal Services, Inc.; Transtar Holding Company; and Truck Bodies & Equipment International. In addition, the Trust added to existing private placement investments in Augusta Sportswear Holding Co.; Directed Electronics, Inc.; and Moss, Inc. The Trust also had realizations in over 16 private placement investments. [PHOTO APPEARS HERE] 5 MassMutual Participation Investors The Outlook for 2006 There are no clear signals that identify prospects for 2006. There is room for optimism in that the Fed presently indicates it does not expect to continue to raise interest rates, which are still low by historical standards. The economy continues to chug along at better-than-expected growth rates, but a return to more normal growth seems likely if inflation is to remain muted. Consumer confidence remains strong, but higher energy prices and cooling of the housing market may slow consumer spending. The rising global demand for energy continues to push prices up. Geopolitical risk worldwide and instability and conflict in the Middle East could create new problems at any time. As always, no one can predict the future with any degree of certainty. Indications are that merger and acquisition activity could be high in 2006. Last year was the world's most active merger and acquisition environment since 2000, with some $1.3 trillion in announced deals in the U.S. alone, according to Thomson Financial. Private equity firms raised a record $86.2 billion in 2005, and are expected to put that to work in 2006. Many corporations also have strong cash positions as well. The market for deals in the coming year will be very competitive, requiring investors to fully scrutinize each opportunity. Regardless of the economic environment, however, the Trust continues to repeatedly employ the investment philosophy and process that has served it well since its inception: investing in companies which we believe have a strong business model, solid cash flow, reasonable financial leverage, and experienced, ethical management. This philosophy, combined with Babson Capital's seasoned investment-management team and the Trust's financial position, contribute to the Trust being well positioned for future investment opportunities that meet its investment objectives and policies. As always, I would like to thank you for your continued interest in and support of MassMutual Participation Investors. Sincerely, CAUTIONARY NOTICE: CERTAIN STATEMENTS CONTAINED IN THIS REPORT /s/ Clifford M. Noreen TO SHAREHOLDERS MAY BE "FORWARD LOOKING" STATEMENTS WITHIN THE Clifford M. Noreen, MEANING OF THE PRIVATE SECURITIES PRESIDENT LITIGATION ACT OF 1995. THESE STATEMENTS ARE NOT GUARANTEES OF FUTURE PERFORMANCE AND ACTUAL RESULTS MAY DIFFER MATERIALLY FROM THOSE FORECASTED. -------------------------------------------------------------------------------- 2005 Record Net Investment Short-Term Ordinary Dividends Date Income Gains Income -------------------------------------------------------------------------------- Regular 05/02/05 $0.2400 -- 07/29/05 0.2400 -- 10/31/05 0.2400 -- 12/30/05 0.2400 -- Special 12/30/05 0.0500 -- -------------------------------------------------------------------------------- $1.0100 $1.0100 -------------------------------------------------------------------------------- The following table summarizes the tax effects of the retention of capital gains for 2005: Amount Per Share Form 2439 -------------------------------------------------------------------------------- 2005 Gains Retained 0.9477 Line 1a Long-Term Gains Retained 0.9477 Taxes Paid 0.3317 Line 2* Basis Adjustment 0.6160 ** -------------------------------------------------------------------------------- * IF YOU ARE NOT SUBJECT TO FEDERAL CAPITAL GAINS TAX (E.G., CHARITABLE ORGANIZATIONS, IRAS AND KEOGH PLANS), YOU MAY BE ABLE TO CLAIM A REFUND BY FILING FORM 990-T. ** FOR FEDERAL INCOME TAX PURPOSES, YOU MAY INCREASE THE ADJUSTED COST BASIS OF YOUR SHARES BY THIS AMOUNT (THE EXCESS OF LINE 1A OVER LINE 2). Qualified for Dividend Interest Earned on Annual Dividend Received Deduction*** Qualified Dividends**** U.S. Gov't. Obligations Amount Per Share Percent Amount Per Share Percent Amount Per Share Percent Amount Per Share ------------------------------------------------------------------------------------------------------------------- $1.01 9.9904% 0.1002 9.9904% 0.1002 0.0000% 0.0000 *** NOT AVAILABLE TO INDIVIDUAL SHAREHOLDERS **** QUALIFIED DIVIDENDS ARE REPORTED IN BOX 1B ON IRS FORM 1099-DIV FOR 2005 6 Financial Report Consolidated Statement of Assets and Liabilities ........................ 8 Consolidated Statement of Operations .................................... 9 Consolidated Statement of Cash Flows .................................... 10 Consolidated Statements of Changes in Net Assets ........................ 11 Consolidated Selected Financial Highlights .............................. 12 Consolidated Schedule of Investments .................................... 13-33 Notes to Consolidated Financial Statements .............................. 34-37 Report of Independent Registered Public Accounting Firm ................. 38 Interested Trustees ..................................................... 39-40 Independent Trustees .................................................... 41-43 Officers of the Trust ................................................... 44 MassMutual Paticipation Investors CONSOLIDATED STATEMENT OF ASSETS AND LIABILITIES December 31, 2005 ASSETS: Investments (See Consolidated Schedule of Investments) Corporate restricted securities at fair value (Cost - $85,392,554) $ 84,550,715 Corporate public securities at market value (Cost - $ 31,111,570) 33,460,320 Short-term securities at amortized cost 14,408,861 ------------ 132,419,896 ------------ Cash 2,765,876 Interest and dividends receivable 2,444,519 Receivable for investments sold 485,267 Other assets 12,780 ------------ TOTAL ASSETS 138,128,338 ------------ LIABILITIES: Dividend payable 2,825,827 Investment advisory fee payable 267,793 Note payable 12,000,000 Interest payable 88,933 Accrued expenses 212,877 Accrued taxes payable 3,713,942 ------------ TOTAL LIABILITIES 19,109,372 ------------ TOTAL NET ASSETS $119,018,966 ============ NET ASSETS: Common shares, par value $.01 per share; an unlimited number authorized $ 97,442 Additional paid-in capital 90,107,502 Retained net realized gain on investments, prior years 19,858,001 Undistributed net investment income 923,836 Accumulated net realized gain on investments 6,700,688 Net unrealized appreciation of investments 1,331,497 ------------ TOTAL NET ASSETS $119,018,966 ------------ COMMON SHARES ISSUED AND OUTSTANDING 9,744,230 ------------ NET ASSET VALUE PER SHARE $ 12.21 ============ See Notes to Consolidated Financial Statements. 8 MassMutual Paticipation Investors CONSOLIDATED STATEMENT OF OPERATIONS For the year ended December 31, 2005 INVESTMENT INCOME: Interest $ 11,353,955 Dividends 857,590 ------------ TOTAL INVESTMENT INCOME 12,211,545 ------------ EXPENSES: Investment advisory fees 1,045,524 Interest 908,729 Trustees' fees and expenses 122,400 Transfer agent/registrar's expenses 26,400 Reports to shareholders 120,000 Legal fees 180,000 Audit fees 117,600 Other 19,784 ------------ TOTAL EXPENSES 2,540,437 ------------ Investment income before income tax expense 9,671,108 ------------ Income tax expense (27,826) ------------ INVESTMENT INCOME - NET 9,643,282 ------------ NET REALIZED AND UNREALIZED GAIN ON INVESTMENTS: Net realized gain on investments before taxes 11,856,942 Income tax expense (3,550,863) ------------ Net realized gain on investments 8,306,079 ------------ Net change in unrealized depreciation of investments before taxes 2,525,930 Deferred income tax expense (175,414) ------------ Net change in unrealized depreciation of investments 2,350,516 ------------ NET GAIN ON INVESTMENTS 10,656,595 ------------ NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS $ 20,299,877 ============ See Notes to Consolidated Financial Statements. 9 MassMutual Paticipation Investors CONSOLIDATED STATEMENT OF CASH FLOWS For the year ended December 31, 2005 Net increase in cash: Cash flows from operating activities: Interest and dividends received $ 10,984,108 Interest expense paid (933,620) Operating expenses paid (1,566,125) Income taxes paid (456,580) ------------ NET CASH PROVIDED BY OPERATING ACTIVITIES 8,027,783 ------------ Cash flows from investing activities: Purchases/Proceeds/Maturities from short-term portfolio securities, net (8,567,184) Purchases of portfolio securities (38,126,210) Proceeds from disposition of portfolio securities 59,108,648 ------------ NET CASH PROVIDED BY INVESTING ACTIVITIES 12,415,254 ------------ NET CASH PROVIDED BY OPERATING AND INVESTING ACTIVITIES 20,443,037 ------------ Cash flows from financing activities: Repayment of borrowings on Revolving Credit Agreement (10,500,000) Cash dividends paid from net investment income (10,474,934) Receipts for shares issued on reinvestment of dividends 927,722 ------------ NET CASH USED FOR FINANCING ACTIVITIES (20,047,212) ------------ NET INCREASE IN CASH 395,825 Cash - beginning of year 2,370,051 ------------ CASH - END OF YEAR $ 2,765,876 ============ RECONCILIATION OF NET INCREASE IN NET ASSETS TO NET CASH PROVIDED BY OPERATING AND INVESTING ACTIVITIES: ------------ NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS $ 20,299,877 ------------ Increase in investments (3,648,499) Increase in interest and dividends receivable (577,184) Decrease in receivable for investments sold 1,043,408 Increase in other assets (12,780) Increase in investment advisory fee payable 26,121 Decrease in interest payable (24,891) Increase in accrued expenses 39,462 Increase in accrued taxes payable 3,297,523 ------------ TOTAL ADJUSTMENTS TO NET ASSETS FROM OPERATIONS 143,160 ------------ NET CASH PROVIDED BY OPERATING AND INVESTING ACTIVITIES $ 20,443,037 ============ See Notes to Consolidated Financial Statements. 10 MassMutual Paticipation Investors CONSOLIDATED STATEMENTS OF CHANGES IN NET ASSETS For the years ended December 31, 2005 and 2004 2005 2004 ------------------------------------------------------------------------------------------------------------------------- INCREASE IN NET ASSETS: Operations: Investment income - net $ 9,643,282 $ 9,713,437 Net realized gain on investments 8,306,079 692,133 Net change in unrealized depreciation of investments 2,350,516 12,493,998 -------------- -------------- Net increase in net assets resulting from operations 20,299,877 22,899,568 -------------- -------------- Increase from common shares issued on reinvestment of dividends Common shares issued (2005 - 71,671; 2004 - 81,587) 927,722 927,073 Dividends to shareholders from: Net investment income (2005 - $1.01 per share; 2004 - $1.10 per share) (9,818,640) (10,613,225) -------------- -------------- TOTAL INCREASE IN NET ASSETS 11,408,959 13,213,416 -------------- -------------- NET ASSETS, BEGINNING OF YEAR 107,610,007 94,396,591 -------------- -------------- NET ASSETS, END OF YEAR $ 119,018,966 $ 107,610,007 ============== ============== See Notes to Consolidated Financial Statements. 11 MassMutual Paticipation Investors CONSOLIDATED SELECTED FINANCIAL HIGHLIGHTS Selected data for each share of beneficial interest outstanding: For the years ended December 31, 2005 2004 2003 2002 2001 ------------------------------------------------------------------------------------------------------------------------- Net asset value: Beginning of year $ 11.13 $ 9.84 $ 8.78 $ 9.12 $ 9.75 -------- -------- -------- -------- -------- Net investment income+ 0.99 1.00 0.80 0.87 0.93 Net realized and unrealized gain (loss) on investments 1.09** 1.36 1.21 (0.35) (0.61) -------- -------- -------- -------- -------- Total from investment operations 2.08 2.36 2.01 0.52 0.32 -------- -------- -------- -------- -------- Dividends from net investment income to common shareholders (1.01) (1.10) (0.96) (0.86) (0.96) Change from issuance of shares 0.01 0.03 0.01 -- 0.01 -------- -------- -------- -------- -------- Total distributions (1.00) (1.07) (0.95) (0.86) (0.95) -------- -------- -------- -------- -------- Net asset value: End of year $ 12.21 $ 11.13 $ 9.84 $ 8.78 $ 9.12 -------- -------- -------- -------- -------- Per share market value: End of year $ 14.05 $ 13.31 $ 11.65 $ 9.40 $ 9.10 ======== ======== ======== ======== ======== Total investment return Market value 17.25% 25.77% 35.50% 12.58% (8.02)% Net asset value* 22.51% 25.14% 23.72% 5.70% 3.41% Net assets (in millions): End of year $ 119.02 $ 107.61 $ 94.40 $ 83.59 $ 86.09 Ratio of operating expenses to average net assets 1.45% 1.63% 1.65% 1.27% 1.22% Ratio of interest expense to average net assets 0.80% 0.89% 0.97% 1.08% 1.47% Ratio of total expenses to average net assets 2.25% 2.52% 2.62% 2.35% 2.69% Ratio of net investment income to average net assets 8.45% 9.60% 8.55% 9.42% 9.70% Portfolio turnover 31.50% 51.25% 55.08% 35.32% 21.58% + Calculated using average shares. * 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. ** Amount includes $0.10 per share in litigation proceeds (see Footnote 8). See Notes to Consolidated Financial Statements. 12 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Shares, Units, Warrants, Ownership or Principal Acquisition Fair Corporate Restricted Securities - 71.04%:(A) Amount Date Cost Value --------------------------------------------------------------------------------------------------------------------------------- Private Placement Investments - 62.99% 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 $ 1,056,546 Warrant, exercisable until 2012, to purchase common stock at $.02 per share (B) 1,230 shs. 04/08/04 -- 12 ------------- ------------- 1,125,000 1,056,558 ------------- ------------- A W C HOLDING COMPANY A manufacturer and distributor of aluminum and vinyl windows and doors in the Southwest and Southeast regions of the U.S. 12% Senior Subordinated Note due 2012 $ 1,125,000 05/18/04 1,026,416 1,144,989 Limited Partnership Interest of A W C Investments LLC (B) 0.74% int. 05/18/04 112,500 306,945 ------------- ------------- 1,138,916 1,451,934 ------------- ------------- ADORN, INC. A manufacturer of wall panels, cabinets, moldings and countertops for houses and recreational vehicles. 12.5% Subordinated Note due 2010 $ 1,125,000 02/29/00 1,041,664 1,125,000 Warrant, exercisable until 2010, to purchase common stock at $.02 per share (B) 192 shs. 02/29/00 162,931 277,171 ------------- ------------- 1,204,595 1,402,171 ------------- ------------- AMERCABLE, INC. A manufacturer of electric power, instrumentation and control cables, primarily for the mining and oil and gas industries. 12% Senior Subordinated Note due 2013 $ 583,333 04/08/05 550,293 587,802 Limited Partnership Interest (B) 0.19% int. 04/07/05 41,667 37,503 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 66 shs. 04/08/05 64,833 1 ------------- ------------- 656,793 625,306 ------------- ------------- AMERICAN HOSPICE MANAGEMENT HOLDING LLC A for-profit hospice care provider in the United States. 12% Senior Subordinated Note due 2010 $ 1,125,000 01/22/04 1,014,796 1,143,846 Preferred Class A Unit (B) 1,337 uts. 01/22/04 133,700 120,330 Common Class B Unit 1,610 uts. 01/22/04 -- 154,458 ------------- ------------- 1,148,496 1,418,634 ------------- ------------- 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 05/18/05 805,622 859,820 Common Stock (B) 263 shs. 05/18/05 263,298 236,970 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 69 shs. 05/18/05 59,362 1 ------------- ------------- 1,128,282 1,096,791 ------------- ------------- 13 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Shares, Units, Warrants, Ownership or Principal Acquisition Fair Corporate Restricted Securities:(A) continued Amount Date Cost Value --------------------------------------------------------------------------------------------------------------------------------- AUGUSTA SPORTSWEAR HOLDING CO. A manufacturer and distributor of athletic apparel, activewear and team uniforms. 12% Senior Subordinated Note due 2012 $ 893,000 12/31/04 $ 834,486 $ 910,073 Common Stock (B) 261 shs. * 261,000 234,900 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 73 shs. 12/31/04 63,254 1 ------------- ------------- *12/31/04 and 03/31/05. 1,158,740 1,144,974 ------------- ------------- BEACON MEDICAL PRODUCTS, INC. A designer, manufacturer and marketer of medical air and gas distribution systems. 8.08% Senior Secured Revolving Credit Facility due 2007 (C) $ 131,792 04/09/02 131,792 132,049 8.08% Senior Secured Tranche A Note due 2008 (C) $ 368,549 04/09/02 368,549 368,549 12% Senior Secured Note due 2010 $ 412,112 04/09/02 362,445 428,596 Limited Partnership Interest of Riverside Capital Appreciation Fund IV, L.P. (B) 5.09% int. 04/09/02 87,045 140,170 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 794 shs. 04/09/02 72,856 127,872 ------------- ------------- 1,022,687 1,197,236 ------------- ------------- BETA BRANDS LTD A manufacturer of hard candy and chocolate-coated products sold primarily to the Canadian market. 5% Promissory Note due 2009 (B) $ 96,698 03/31/04 96,698 -- Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 2,421 shs. 03/31/04 1 -- ------------- ------------- 96,699 -- ------------- ------------- BETTER MINERALS & AGGREGATES A producer of high grade industrial and specialty silica sands. 14% Redeemable Preferred Stock (B) 499 shs. 09/30/99 272,912 54,525 Convertible Preferred Stock Series A and B, convertible into common stock at $9.26 per share (B) 62,997 shs. 12/19/96 583,300 -- Common Stock (B) 10,013 shs. 09/30/99 399,505 -- Warrants, exercisable until 2010, to purchase common stock at $.01 per share (B) 5,700 shs. ** 64,247 -- ------------- ------------- **12/19/96 and 09/30/99. 1,319,964 54,525 ------------- ------------- C & J SPEC-RENT SERVICES, INC. A provider of coiled tubing and pressure pumping services to the oil and gas industry in Texas and Louisiana. 10% Senior Secured Term Note due 2012 $ 886,597 08/12/05 886,567 891,894 14% Senior Subordinated Note due 2013 $ 644,776 08/12/05 585,645 641,352 Common Stock (B) 268,657 shs. 08/12/05 268,657 241,791 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 49,552 shs. 08/12/05 60,910 496 ------------- ------------- 1,801,779 1,775,533 ------------- ------------- 14 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Shares, Units, Warrants, Ownership or Principal Acquisition Fair Corporate Restricted Securities:(A) continued Amount Date Cost Value --------------------------------------------------------------------------------------------------------------------------------- C & M CONVEYOR, INC. A manufacturer and supplier of material handling systems to the corrugated sheet and container industry. 9.5% Senior Secured Term Note due 2007 $ 433,735 09/13/02 $ 433,735 $ 434,990 11% Senior Subordinated Note due 2010 $ 478,916 09/13/02 460,313 482,378 Common Stock (B) 180,723 shs. 09/13/02 180,723 271,085 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 78,386 shs. 09/13/02 34,428 117,579 ------------- ------------- 1,109,199 1,306,032 ------------- ------------- CAINS FOODS, L.P. A producer of mayonnaise and sauce products for both the retail and food service markets. Limited Partnership Interest 6.49% int. 09/29/95 79,184 500,413 ------------- ------------- CAPESUCCESS LLC A provider of diversified staffing services. Preferred Membership Interests (B) 806 uts. 04/29/00 3,598 180 Common Membership Interests (B) 10,421 uts. 04/29/00 46,706 2,332 ------------- ------------- 50,304 2,512 ------------- ------------- CAPITAL SPECIALTY PLASTICS, INC. A producer of desiccant strips used for packaging pharmaceutical products. Common Stock (B) 55 shs. * 252 1,078 ------------- ------------- *12/30/97 and 05/29/99. COEUR, INC. A producer of proprietary, disposable power injection syringes. 8.75% Senior Secured Term Note due 2010 $ 326,087 04/30/03 326,087 328,423 11.5% Senior Subordinated Note due 2011 $ 242,754 04/30/03 224,660 246,103 Common Stock (B) 72,463 shs. 04/30/03 72,463 65,217 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 50,099 shs. 04/30/03 23,317 501 ------------- ------------- 646,527 640,244 ------------- ------------- COINING CORPORATION OF AMERICA LLC A manufacturer of close tolerance parts and metal stampings. 9.25% Senior Secured Revolving Credit Facility due 2006 (C) $ 92,593 01/07/02 92,593 91,408 9.25% Senior Secured Tranche A Note due 2007 (C) $ 483,605 06/26/01 483,605 464,516 13% Senior Secured Tranche B Note due 2006 $ 370,370 06/26/01 370,370 360,976 Limited Partnership Interest (B) 3.65% int. 06/26/01 185,185 148,148 Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 61,163 shs. 06/26/01 45,370 612 ------------- ------------- 1,177,123 1,065,660 ------------- ------------- 15 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Shares, Units, Warrants, Ownership or Principal Acquisition Fair Corporate Restricted Securities:(A) continued Amount Date Cost Value --------------------------------------------------------------------------------------------------------------------------------- CONNOR SPORT COURT INTERNATIONAL, INC. A designer and manufacturer of outdoor and indoor synthetic sports flooring and other temporary flooring products. 12% Senior Subordinated Note due 2012 $ 1,059,417 * $ 980,587 $ 953,475 Limited Partnership Interest (B) 4.43% int. ** 103,135 82,508 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 92 shs. * 84,829 1 ------------- ------------- *08/12/04 and 01/18/05. **08/12/04 and 01/14/05. 1,168,551 1,035,984 ------------- ------------- CONSOLIDATED FOUNDRIES HOLDINGS A manufacturer of engineered cast metal components for the global aerospace and defense industries. 12% Senior Subordinated Note due 2013 $ 1,157,143 06/15/05 1,106,094 1,161,073 Common Stock (B) 193 shs. 06/15/05 192,857 173,574 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 54 shs. 06/15/05 53,295 1 ------------- ------------- 1,352,246 1,334,648 ------------- ------------- 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 1,279,353 1,334,060 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 10 shs. 08/04/05 72,617 -- ------------- ------------- 1,351,970 1,334,060 ------------- ------------- CORVEST GROUP, INC. A manufacturer and distributor of promotional products. 12% Senior Subordinated Note due 2007 $ 2,045,455 *** 1,972,457 1,022,728 Common Stock (B) 30 shs. *** 51,136 5,114 Limited Partnership Interest (B) 10.23% int. *** 150,377 15,182 Warrant, exercisable until 2007, to purchase common stock at $.01 per share (B) 171 shs. *** 157,343 29,489 ------------- ------------- ***03/05/99 and 03/24/99. 2,331,313 1,072,513 ------------- ------------- DEXTER MAGNETICS TECHNOLOGIES, INC. A designer, fabricator, assembler and distributor of industrial magnets and subassemblies in North America and Europe. Common Stock (B) 310 shs. 07/19/01 309,783 367,858 Warrant, exercisable until 2006, to purchase common stock at $.01 per share (B) 157 shs. 07/19/01 132,677 186,446 ------------- ------------- 442,460 554,304 ------------- ------------- DIRECTED ELECTRONICS, INC. A designer and distributor of brand name automotive security systems, audio products and installation accessories. Common Stock (B) 126,817 shs. 12/19/05 40,518 1,597,892 Limited Partnership Interest (B) 4.61% int. **** 6,302 198,354 ------------- ------------- ****12/22/99 and 09/14/05. 46,820 1,796,246 ------------- ------------- 16 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Shares, Units, Warrants, Ownership or Principal Acquisition Fair Corporate Restricted Securities:(A) continued Amount Date Cost Value --------------------------------------------------------------------------------------------------------------------------------- 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 1,252,858 Warrants, exercisable until 2011, to purchase common stock of DHI Holdings, Inc. at $.01 per share (B) 6,676 shs. * 201,655 -- ------------- ------------- *10/24/96 and 08/28/98. 1,960,217 1,252,858 ------------- ------------- DWYER GROUP, INC. A franchiser of a variety of home repair services. 14% Senior Subordinated Note due 2011 $ 984,375 10/30/03 901,330 1,004,063 Common Stock (B) 3,656 shs. ** 365,600 314,134 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 1,077 shs. 10/30/03 98,719 92,506 ------------- ------------- **10/30/03 and 01/02/04. 1,365,649 1,410,703 ------------- ------------- 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 11 shs. 06/28/04 40,875 59,692 ------------- ------------- EAGLE PACK PET FOODS, INC. A manufacturer of premium pet food sold through independent pet stores. 14% Senior Subordinated Note due 2011 $ 562,500 09/24/04 543,981 573,750 Warrant, exercisable until 2011, to purchase common stock at $.02 per share (B) 2,163 shs. 09/24/04 20,893 38,069 ------------- ------------- 564,874 611,819 ------------- ------------- EAST RIVER VENTURES I, L.P. An acquirer of controlling or substantial interests in other entities Limited Partnership Interest (B) 0.03% int. 01/01/01 6,710 5,423 ------------- ------------- ENZYMATIC THERAPY, INC. A manufacturer and distributor of branded natural medicines and nutritional supplements. Limited Partnership Interest (B) 0.70% int. 03/30/00 281,250 2,813 Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 15,415 shs. 03/30/00 135,000 154 ------------- ------------- 416,250 2,967 ------------- ------------- EURO-PRO CORPORATION A designer, marketer and distributor of floor care, steam cleaning and small kitchen products and appliances. 13.25% Senior Subordinated Note due 2011 $ 1,125,000 09/09/03 1,106,131 1,012,500 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 23,229 shs. 09/09/03 18,869 232 ------------- ------------- 1,125,000 1,012,732 ------------- ------------- 17 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Shares, Units, Warrants, Ownership or Principal Acquisition Fair Corporate Restricted Securities:(A) continued Amount Date Cost Value --------------------------------------------------------------------------------------------------------------------------------- EVANS CONSOLES, INC. A designer and manufacturer of consoles and control center systems. Limited Partnership Interest of CM Equity Partners (B) 1.21% int. 02/11/98 $ 64,535 $ -- Common Stock (B) 45,000 shs. 05/06/04 6 -- ------------- ------------- 64,541 -- ------------- ------------- 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 91,867 737 ------------- ------------- 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 * 985,755 1,102,284 Common Stock (B) 33 shs. * 33,216 38,120 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 106 shs. * 105,618 121,199 ------------- ------------- *06/30/04 and 08/19/04. 1,124,589 1,261,603 ------------- ------------- INTEGRATION TECHNOLOGY SYSTEMS, INC. A manufacturer of steel protective computer and network systems for the industrial and office environments. 12% Senior Secured Note due 2006 $ 949,004 03/01/04 938,546 711,753 Common Stock (B) 130 shs. 06/01/00 149,500 -- ------------- ------------- 1,088,046 711,753 ------------- ------------- ITC^DELTACOM, INC. A provider of integrated communications services in the southeastern United States. 12.81% Senior Secured Note due 2009 (C) $ 1,168,440 07/26/05 1,168,440 1,168,089 16.31% Senior Secured Note due 2009 (C) $ 181,560 07/26/05 181,560 182,087 Warrant, exercisable until 2009, to purchase convertible preferred stock at $.01 per share (B) 54,468 shs. 07/26/05 -- 68,085 ------------- ------------- 1,350,000 1,418,261 ------------- ------------- JASON, INC. A diversified manufacturing company serving various industrial markets. 13% Senior Subordinated Note due 2008 $ 510,187 08/04/00 480,162 505,379 14% Cumulative Redeemable Preferred Stock Series A (B) 153 shs. 08/04/00 153,119 150,330 Limited Partnership Interest of Saw Mill Capital Fund II, L.P. (B) 1.30% int. 08/03/00 469,250 375,461 Warrants, exercisable until 2008 and 2009, to purchase common stock at $.01 per share (B) 26,931 shs. 08/04/00 61,101 24,844 ------------- ------------- 1,163,632 1,056,014 ------------- ------------- 18 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Shares, Units, Warrants, Ownership or Principal Acquisition Fair Corporate Restricted Securities:(A) continued Amount Date Cost Value --------------------------------------------------------------------------------------------------------------------------------- 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 $ 795,078 $ 832,871 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 594 shs. 12/15/04 53,528 6 ------------- ------------- 848,606 832,877 ------------- ------------- KEEPSAKE QUILTING, INC. A seller of quilting fabrics, books, patterns, kits and notions to consumers. 7.35% Senior Secured Revolving Note due 2006 (C) $ 20,967 06/16/00 20,967 20,938 7.94% Senior Secured Tranche A Note due 2007 (C) $ 235,882 06/16/00 235,882 234,741 12% Senior Secured Tranche B Note due 2008 $ 314,509 06/16/00 303,432 320,799 Limited Partnership Interest of Riverside XVI Holding Company, L.P. (B) 3.02% int. 06/12/00 190,563 179,689 Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 633 shs. 06/12/00 26,209 59,688 ------------- ------------- 777,053 815,855 ------------- ------------- KELE AND ASSOCIATES, INC. A distributor of building automation control products. 12% Senior Subordinated Note due 2012 $ 969,643 02/27/04 889,319 972,157 Preferred Stock (B) 12 shs. 11/24/04 237,794 241,915 Common Stock (B) 6 shs. 02/27/04 6,814 55,706 Warrant, exercisable until 2012, to purchase common stock at $.02 per share (B) 6 shs. 02/27/04 4,124 50,948 ------------- ------------- 1,138,051 1,320,726 ------------- ------------- KEYSTONE NORTH AMERICA, INC. An operator of funeral homes in North America. Common Stock 28,577 shs. 02/08/05 137,444 171,462 ------------- ------------- LIH INVESTORS, L.P. A manufacturer and marketer of a broad line of external accessories for new and used sport utility vehicles, trucks and vans. 12.5% Senior Subordinated Note due 2008 $ 2,036,000 * 1,874,786 2,034,722 Common Stock (B) 3,057 shs. * 213,998 117,695 Warrant, exercisable until 2006, to purchase common stock at $.11 per share (B) 8,245 shs. * 318,838 317,433 ------------- ------------- *12/23/98 and 01/28/99. 2,407,622 2,469,850 ------------- ------------- 19 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Shares, Units, Warrants, Ownership or Principal Acquisition Fair Corporate Restricted Securities:(A) continued Amount Date Cost Value --------------------------------------------------------------------------------------------------------------------------------- MAVERICK ACQUISITION COMPANY A manufacturer of capsules that cover the cork and neck of wine bottles. 8.57% Senior Secured Tranche A Note due 2010 (C) $ 436,568 09/03/04 $ 436,568 $ 436,673 12% Senior Secured Tranche B Note due 2011 $ 179,104 09/03/04 159,178 181,161 Limited Partnership Interest (B) 4.48% int. 09/03/04 33,582 30,224 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 243 shs. 09/03/04 22,556 2 ------------- ------------- 651,884 648,060 ------------- ------------- MAXON CORPORATION A manufacturer of industrial combustion equipment and related shut-off valves and control valves. 12% Senior Subordinated Note due 2012 $ 549,837 09/30/04 503,063 553,170 8.75% Senior Subordinated Note due 2012 $ 732,065 09/30/04 732,065 741,938 Common Stock (B) 218,099 shs. 09/30/04 218,099 196,289 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 87,755 shs. 09/30/04 51,941 878 ------------- ------------- 1,505,168 1,492,275 ------------- ------------- MEDASSIST, INC. A provider of patient eligibility and accounts receivable management services to hospitals and physician practices. 8% Preferred Stock 44 shs. 10/28/04 44,289 45,044 Common Stock 13,863 shs. 10/28/04 18,576 21,459 Warrant, exercisable until 2013, to purchase common stock at $.01 per share 47,090 shs. 05/01/03 21,534 72,472 ------------- ------------- 84,399 138,975 ------------- ------------- 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 $ 1,134,000 08/12/05 1,063,236 1,109,039 Common Stock (B) 216 shs. 08/12/05 216,000 194,400 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 73 shs. 08/12/05 72,576 1 ------------- ------------- 1,351,812 1,303,440 ------------- ------------- MOSS, INC. A manufacturer and distributor of large display and exhibit structures. 8.51% Senior Secured Revolving Note due 2010 (C) $ 23,529 12/21/05 22,353 23,305 8.51% Senior Secured Tranche A Note due 2010 (C) $ 582,353 12/21/05 576,529 576,788 12% Senior Secured Tranche B Note due 2010 $ 200,000 12/21/05 177,059 200,295 Limited Partnership Interest of Riverside Capital Appreciation Fund I, L.P. (B) 19.20% int. * 178,069 222,576 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 122 shs. 12/21/05 20,941 1 ------------- ------------- *09/20/00 and 05/23/02. 974,951 1,022,965 ------------- ------------- 20 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Shares, Units, Warrants, Ownership or Principal Acquisition Fair Corporate Restricted Securities:(A) continued Amount Date Cost Value --------------------------------------------------------------------------------------------------------------------------------- MUSTANG VENTURES COMPANY A natural gas gathering and processing operation located in Oklahoma and Texas. Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 8,752 shs. 12/11/02 $ 261,264 $ 1,185,877 ------------- ------------- NEFF MOTIVATION, INC. A manufacturer and distributor of customized awards and sportswear to schools. 12.5% Senior Subordinated Note due 2011 $ 562,500 01/31/03 488,034 579,375 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 112 shs. 01/31/03 95,625 46,352 ------------- ------------- 583,659 625,727 ------------- ------------- NONNI'S FOOD COMPANY A producer and distributor of premium biscotti and bagel chips in North America. 12.25% Senior Subordinated Note due 2012 $ 986,538 03/29/04 982,661 999,443 10% Preferred Stock (B) 135 shs. 03/29/04 135,044 136,592 Common Stock (B) 3,418 shs. 03/29/04 3,418 25,430 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 4,565 shs. 03/29/04 3,877 33,925 ------------- ------------- 1,125,000 1,195,390 ------------- ------------- NYLONCRAFT, INC. A supplier of engineered plastic components for the automotive industry. 9% Senior Secured Note due 2009 $ 464,286 01/28/02 464,286 462,402 11.5% Senior Subordinated Note due 2012 $ 857,143 01/28/02 789,393 843,510 Common Stock (B) 178,571 shs. 01/28/02 178,571 122,143 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 138,928 shs. 01/28/02 92,597 93,777 ------------- ------------- 1,524,847 1,521,832 ------------- ------------- O R S NASCO HOLDING, INC. A wholesale distributor of industrial supplies in North America. 13% Senior Subordinated Note due 2013 $ 1,256,152 12/20/05 1,178,737 1,242,232 Common Stock (B) 93,848 shs. 12/20/05 93,848 84,463 Warrant, exercisable until 2015, to purchase common stock at $.01 per share (B) 52,820 shs. 12/20/05 52,292 528 ------------- ------------- 1,324,877 1,327,223 ------------- ------------- OLYMPIC SALES, INC. A boat retailer in Washington state, Oregon and California and British Columbia. 14% Senior Subordinated Note due 2006 $ 1,241,000 08/07/98 1,241,000 1,221,735 12% Senior Subordinated Note due 2008 $ 244,154 02/09/00 234,242 235,305 Limited Partnership Interest of Riverside VIII, VIII-A and VIII-B Holding Company, L.P. 10.66% int. * 808,300 694,818 Warrants, exercisable until 2007 and 2008, to purchase common stock at $.01 per share (B) 15,166 shs. ** 206,041 46,955 ------------- ------------- *08/07/98, 02/23/99, 12/22/99 and 02/25/03. **08/07/98 and 02/29/00. 2,489,583 2,198,813 ------------- ------------- 21 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Shares, Units, Warrants, Ownership or Principal Acquisition Fair Corporate Restricted Securities:(A) continued Amount Date Cost Value --------------------------------------------------------------------------------------------------------------------------------- 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 2008 $ 1,125,000 12/19/00 $ 1,053,347 $ 1,129,722 Membership Interests of MM/Lincap PPI Investments, Inc. LLC (B) 1.28% int. 12/21/00 140,625 79,804 ------------- ------------- 1,193,972 1,209,526 ------------- ------------- PRECISION DYNAMICS, INC. A manufacturer of custom-designed solenoid valves and controls. 8% Senior Secured Revolving Credit Facility due 2006 (C) $ 207,825 07/22/96 207,825 207,825 12% Senior Secured Term Note due 2006 $ 163,000 07/22/96 161,941 163,000 8% Preferred Stock 228 shs. 07/22/96 116,023 231,888 Common Stock (B) 299 shs. 07/22/96 14,489 43,467 Warrant, exercisable until 2006, to purchase common stock at $.01 per share (B) 162 shs. 07/22/96 49,000 2 ------------- ------------- 549,278 646,182 ------------- ------------- PROTEIN GENETICS, INC. A producer of bovine artificial insemination products, related breeding and healthcare products and specialty genetics sold to the dairy and beef industries. 9.8% Redeemable Exchangeable Preferred Stock (B) 332 shs. 08/12/94 33,217 -- Common Stock (B) 867 shs. * 42,365 -- ------------- ------------- *11/14/01 and 08/12/94 75,582 -- ------------- ------------- QUALIS AUTOMOTIVE LLC A distributor of aftermarket automotive brake and chassis products. 12% Senior Subordinated Note due 2012 $ 937,500 05/28/04 764,486 954,336 Common Stock (B) 187,500 shs. 05/28/04 187,500 168,750 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 199,969 shs. 05/28/04 199,969 2,000 ------------- ------------- 1,151,955 1,125,086 ------------- ------------- QUALSERV CORPORATION A provider of foodservice equipment and supplies to major restaurant chains and their franchisees. 14% Senior Subordinated Note due 2012 $ 1,002,475 07/09/04 976,254 601,485 Limited Partnership Interest (B) 4.90% int. 07/09/04 137,195 -- Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 280 shs. 07/09/04 25,973 -- ------------- ------------- 1,139,422 601,485 ------------- ------------- 22 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Shares, Units, Warrants, Ownership or Principal Acquisition Fair Corporate Restricted Securities:(A) continued Amount Date Cost Value --------------------------------------------------------------------------------------------------------------------------------- RIVER RANCH FRESH FOODS LLC A supplier of fresh produce to the retail and foodservice channels. 13% Senior Subordinated Note due 2011 $ 975,000 09/29/04 $ 900,785 $ 906,750 Limited Partnership Interest (B) 21,500 uts. 09/29/04 150,000 122,998 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 12,481 shs. 09/29/04 83,596 125 ------------- ------------- 1,134,381 1,029,873 ------------- ------------- ROYAL BATHS MANUFACTURING COMPANY A manufacturer and distributor of acrylic and cultured marble bathroom products. 12.5% Senior Subordinated Note due 2011 $ 562,500 11/14/03 508,263 565,447 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 74 shs. 11/14/03 65,089 37,756 ------------- ------------- 573,352 603,203 ------------- ------------- SAFETY SPEED CUT MANUFACTURING COMPANY, INC. A manufacturer of vertical panel saws and routers for the wood working industry. 7.36% Senior Secured Tranche A Note due 2007 (C) $ 457,646 06/02/99 457,646 457,645 12% Senior Secured Tranche B Note due 2007 $ 646,089 06/02/99 646,089 646,089 Class B Common Stock (B) 846 shs. 06/02/99 146,456 290,455 ------------- ------------- 1,250,191 1,394,189 ------------- ------------- SAVAGE SPORTS HOLDING, INC. A manufacturer of sporting firearms. 12% Senior Subordinated Note due 2012 $ 814,655 09/10/04 760,039 817,605 Common Stock (B) 310 shs. 09/10/04 310,345 253,171 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 71 shs. 09/10/04 60,129 57,706 ------------- ------------- 1,130,513 1,128,482 ------------- ------------- SPECIALTY FOODS GROUP, INC. A manufacturer and distributor of branded meat products. Limited Partnership Interest of MHD Holdings LLC 0.76% int. 08/29/00 307,860 -- ------------- ------------- STRATEGIC EQUIPMENT & SUPPLY CORPORATION, INC. A provider of kitchen and restaurant design, equipment fabrication and installation services. Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 61,862 shs. 01/14/00 382,501 -- ------------- ------------- SYNVENTIVE EQUITY LLC A manufacturer of hot runner systems used in the plastic injection molding process. Limited Partnership Interest (B) 1.05% int. 08/20/03 33,463 5,972 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 45,942 shs. 08/21/03 10,249 8,199 ------------- ------------- 43,712 14,171 ------------- ------------- 23 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Shares, Units, Warrants, Ownership or Principal Acquisition Fair Corporate Restricted Securities:(A) continued Amount Date Cost Value --------------------------------------------------------------------------------------------------------------------------------- TANGENT RAIL CORPORATION A manufacturer of rail ties and provides specialty services to the North American railroad industry. 13% Senior Subordinated Note due 2013 $ 1,173,909 10/14/05 $ 996,370 $ 1,150,960 Preferred Stock (B) 1,749 shs. 10/14/05 174,924 169,724 Common Stock (B) 1,167 shs. 10/14/05 1,167 1,050 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 618 shs. 10/14/05 155,860 6 ------------- ------------- 1,328,321 1,321,740 ------------- ------------- TERRA RENEWAL SERVICES, INC. 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. 7.78% Senior Secured Term A Note due 2010 (C) $ 116,797 03/01/05 116,797 116,797 7.78% Senior Secured Term B Note due 2012 (C) $ 207,421 03/01/05 207,421 207,014 12% Senior Subordinated Note due 2013 $ 585,937 03/01/05 555,847 574,203 Limited Partnership Interest of Saw Mill Capital Fund V, L.P. (B) 2.30% int. 03/01/05 235,547 211,995 Warrant, exercisable until 2015, to purchase common stock at $.01 per share (B) 37 shs. 03/01/05 32,098 -- ------------- ------------- 1,147,710 1,110,009 ------------- ------------- THE TRANZONIC COMPANIES 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 2009 $ 1,356,000 02/05/98 1,264,256 1,356,000 Common Stock (B) 315 shs. 02/04/98 315,000 318,371 Warrant, exercisable until 2006, to purchase common stock at $.01 per share (B) 222 shs. 02/05/98 184,416 224,375 ------------- ------------- 1,763,672 1,898,746 ------------- ------------- TOMAH HOLDINGS, INC. A manufacturer of specialty chemicals. 16% Senior Subordinated Note due 2011 $ 797,091 * 773,452 797,090 16% Preferred Stock Series A (B) 20 shs. 12/08/03 334,393 485,310 Common Stock (B) 11,246 shs. ** 111,066 194,491 ------------- ------------- *12/08/03 and 12/30/05. **12/08/03 and 07/01/05. 1,218,911 1,476,891 ------------- ------------- TRANSTAR HOLDING COMPANY A distributor of aftermarket automotive transmission parts. 12% Senior Subordinated Note due 2013 $ 918,000 08/31/05 877,564 907,820 Common Stock (B) 432 shs. 08/31/05 432,000 388,800 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 46 shs. 08/31/05 41,021 -- ------------- ------------- 1,350,585 1,296,620 ------------- ------------- 24 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Shares, Units, Warrants, Ownership or Principal Acquisition Fair Corporate Restricted Securities:(A) continued Amount Date Cost Value --------------------------------------------------------------------------------------------------------------------------------- TRONAIR, INC. A designer, engineer and manufacturer of ground support equipment for the business, commuter and commercial aviation markets. 10.5% Senior Secured Term Note due 2008 $ 676,983 01/20/00 $ 676,983 $ 677,910 12% Senior Subordinated Note due 2010 $ 758,100 01/20/00 728,537 762,620 Common Stock (B) 129,960 shs. 01/20/00 129,960 116,964 Warrant, exercisable until 2010, to purchase common stock at $1 per share (B) 148,912 shs. 01/20/00 56,316 1,489 ------------- ------------- 1,591,796 1,558,983 ------------- ------------- TRUCK BODIES & EQUIPMENT INTERNATIONAL A designer and manufacturer of accessories for heavy and medium duty trucks, primarily dump bodies, hoists, various forms of flat-bed bodies, landscape bodies and other accessories. 12% Senior Subordinated Note due 2013 $ 1,222,698 * 1,135,937 1,232,851 Common Stock (B) 393 shs. * 423,985 531,803 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 81 shs. * 84,650 109,826 ------------- ------------- *07/19/05 and 12/22/05. 1,644,572 1,874,480 ------------- ------------- TRUSTILE DOORS, INC. A manufacturer and distributor of interior doors. 12.5% Senior Subordinated Note due 2010 $ 562,500 04/11/03 525,923 560,329 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 3,060 shs. 04/11/03 50,625 17,491 ------------- ------------- 576,548 577,820 ------------- ------------- TUBULAR TEXTILE MACHINERY A designer, manufacturer, sale and servicer of finishing machinery for the knit and woven segments of the global textile industry. 12% Senior Subordinated Note due 2014 $ 705,457 05/28/04 638,277 686,945 8.75% Senior Secured Note due 2011 $ 409,310 05/28/04 409,310 404,377 Common Stock (B) 385,233 shs. 05/28/04 385,233 327,448 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 116,521 shs. 05/28/04 74,736 1,165 ------------- ------------- 1,507,556 1,419,935 ------------- ------------- TVI, INC. A retailer of used clothing in the United States, Canada and Australia. Common Stock (B) 187,500 shs. 05/02/00 187,500 202,500 ------------- ------------- U S M HOLDINGS CORPORATION A provider of facility maintenance services to retail and corporate clients with multiple locations. 12% Senior Subordinated Note due 2011 $ 473,684 08/06/03 409,394 487,895 Preferred Stock 1,361 shs. 08/06/03 136,089 136,098 Common Stock (B) 546 shs. 08/06/03 546 546 Warrant, exercisable until 2011, to purchase common stock at $.01 per share 502 shs. 08/06/03 157,869 502 ------------- ------------- 703,898 625,041 ------------- ------------- 25 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Shares, Units, Warrants, Ownership or Principal Acquisition Fair Corporate Restricted Securities:(A) continued Amount Date Cost Value --------------------------------------------------------------------------------------------------------------------------------- U-LINE CORPORATION A manufacturer of high-end, built-in, undercounter icemaking, wine storage and refrigeration appliances. 12.5% Senior Subordinated Note due 2012 $ 996,500 04/30/04 $ 897,779 $ 1,024,616 Common Stock (B) 96 shs. 04/30/04 96,400 95,436 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 122 shs. 04/30/04 112,106 120,780 ------------- ------------- 1,106,285 1,240,832 ------------- ------------- VICTORY VENTURES LLC An acquirer of controlling or substantial interests in other entities. Series A Preferred Units (B) 0.04% int. 12/02/96 1 2 ------------- ------------- VITALITY FOODSERVICE, INC. A non-carbonated beverage dispensing company focused on the foodservice industry. 13% Senior Subordinated Note due 2011 $ 999,153 09/24/04 911,355 1,001,135 Common Stock (B) 12,585 shs. 09/24/04 125,850 172,767 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 12,593 shs. 09/24/04 98,938 172,877 ------------- ------------- 1,136,143 1,346,779 ------------- ------------- VITEX PACKAGING GROUP, INC. A manufacturer of specialty packaging, primarily envelopes and tags used on tea bags and medical and food products. 12.5% Senior Subordinated Note due 2012 $ 900,000 07/19/04 785,151 867,051 Limited Partnership Interest Class A (B) 0.93% int. 07/19/04 219,375 197,438 Limited Partnership Interest Class B (B) 0.41% int. 07/19/04 96,848 87,163 ------------- ------------- 1,101,374 1,151,652 ------------- ------------- WALLS INDUSTRIES, INC. A provider of branded workwear and sporting goods apparel. 10% Senior Subordinated Lien Note due 2009 $ 532,895 07/12/04 532,895 537,763 14% Senior Subordinated Note due 2012 $ 566,163 07/12/04 564,740 579,245 Limited Partnership Interest (B) 0.20% int. 07/12/04 19,737 53,290 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 2,133 shs. 07/12/04 1,500 5,741 1,118,872 1,176,039 ------------- ------------- Total Private Placement Investments $ 75,522,833 $ 74,973,531 ------------- ------------- 26 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Shares or Interest Due Principal Market Rule 144A Securities - 8.05%: (A) Rate Date Amount Cost Value --------------------------------------------------------------------------------------------------------------------------------- BONDS - 6.95% A E S Corporation 8.750% 05/15/13 $ 425,000 $ 473,492 $ 462,719 A E S Corporation 9.000 05/15/15 175,000 175,000 191,625 Activant Solutions, Inc. (C) 10.054 04/01/10 400,000 400,000 412,500 Atlas Pipeline Partners 8.125 12/15/15 100,000 100,000 100,875 Blockbuster, Inc. 9.000 09/01/12 275,000 276,986 242,000 Bombardier Capital, Inc. 6.125 06/29/06 500,000 503,795 500,000 Bombardier, Inc. 6.300 05/01/14 500,000 440,315 437,500 Charter Communications Op LLC 8.000 04/30/12 500,000 498,750 497,500 Douglas Dynamics LLC 7.750 01/15/12 325,000 326,864 313,625 Hertz Corporation 10.500 01/01/16 25,000 25,000 25,750 Intelsat Bermuda, Ltd. 8.695 01/15/12 225,000 225,000 228,656 Intelsat Bermuda, Ltd. 8.250 01/15/13 250,000 250,000 252,500 Interactive Health LLC 7.250 04/01/11 500,000 420,156 405,000 Markwest Energy 6.875 11/01/14 250,000 250,000 230,000 Neiman Marcus Group, Inc. 10.375 10/15/15 600,000 600,000 609,750 NOVAChemicals Corporation 7.561 11/15/13 250,000 250,000 255,313 P Q Corporation 7.500 02/15/13 685,000 677,350 637,050 Pacific Energy Partners 6.250 09/15/15 100,000 99,544 98,500 Pogo Producing Co. 6.875 10/01/17 250,000 250,000 243,750 Service Corporation International 7.500 06/15/17 500,000 495,015 496,250 Siebe PLC 6.500 01/15/10 350,000 308,000 311,500 Sierra Pacific Resources 6.750 08/15/17 330,000 331,652 328,350 Sungard Data Systems 9.125 08/15/13 75,000 75,000 77,625 T C W Lev Income Trust L.P. (B) 8.410 11/30/06 581,430 581,430 313,972 Tenaska Alabama Partners L.P. 7.000 06/30/21 175,830 175,830 176,891 Texas Genco LLC 6.875 12/15/14 350,000 350,000 378,875 Texas Industries, Inc. 7.250 07/15/13 35,000 35,000 36,313 ------------ ------------ ------------ TOTAL BONDS $ 8,732,260 8,594,179 8,264,389 ------------ ------------ ------------ CONVERTIBLE BONDS - 1.10% Cymer, Inc. 3.500% 02/15/09 $ 450,000 $ 450,000 $ 440,438 ICOS Corporation 2.000 07/01/23 375,000 298,125 301,875 Q L T, Inc. 3.000 09/15/23 305,000 277,410 269,544 Wesco International, Inc. 2.625 10/15/25 250,000 250,000 300,938 ------------ ------------ ------------ TOTAL CONVERTIBLE BONDS $ 1,380,000 1,275,535 1,312,795 ------------ ------------ ------------ WARRANTS - 0.00% Winsloew Furniture, Inc. (B) 700 $ 7 $ -- ------------ ------------ ------------ TOTAL WARRANTS 7 -- TOTAL RULE 144A SECURITIES 9,869,721 9,577,184 ------------ ------------ TOTAL CORPORATE RESTRICTED SECURITIES $ 85,392,554 $ 84,550,715 ------------ ------------ 27 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Interest Due Principal Market Corporate Public Securities - 28.11%: (A) Rate Date Amount Cost Value --------------------------------------------------------------------------------------------------------------------------------- BONDS - 24.12% Abitibi-Consolidated, Inc. 7.750% 06/15/11 $ 500,000 $ 516,007 $ 476,250 Activant Solutions, Inc. 10.500 06/15/11 325,000 325,807 355,875 Aearo Co. 8.250 04/15/12 225,000 225,000 228,375 Allied Waste NA 7.875 04/15/13 500,000 513,653 516,250 American Media Operation, Inc. 8.875 01/15/11 475,000 475,625 403,750 Appleton Papers, Inc. 8.125 06/15/11 250,000 250,000 243,125 Argo Tech Corporation 9.250 06/01/11 425,000 425,000 435,625 Arrow Electronics, Inc. 7.000 01/15/07 500,000 513,692 509,002 BCP Crystal US Holdings Corporation 9.625 06/15/14 355,000 355,000 394,938 C S C Holdings, Inc. 7.625 04/01/11 250,000 250,945 248,750 Cablevision Systems Corporation (C) 8.716 04/01/09 450,000 450,000 454,500 Cadmus Communications Corporation 8.375 06/15/14 350,000 350,000 359,625 Chemed Corporation 8.750 02/24/11 600,000 600,000 643,500 Chesapeake Energy Corporation 7.000 08/15/14 650,000 676,423 672,750 Cincinnati Bell, Inc. 8.375 01/15/14 550,000 503,750 541,063 Clayton Williams Energy, Inc. 7.750 08/01/13 375,000 375,000 360,000 Del Monte Corporation 8.625 12/15/12 200,000 200,000 212,500 Dollar Financial Group 9.750 11/15/11 325,000 325,000 334,750 Dominos, Inc. 8.250 07/01/11 109,000 108,213 113,905 Electronic Data Systems Corporation 7.125 10/15/09 500,000 505,130 531,299 Esterline Technologies 7.750 06/15/13 175,000 175,000 182,875 Ford Motor Credit Co. 5.800 01/12/09 500,000 499,070 436,170 Ford Motor Credit Co. 7.375 10/28/09 750,000 748,125 665,165 G F S I, Inc. 9.625 03/01/07 375,000 340,353 337,500 Gencorp, Inc. 9.500 08/15/13 130,000 130,000 139,750 General Motors Acceptance Corporation 5.850 01/14/09 750,000 743,204 670,970 Goodyear Tire & Rubber Co. 7.857 08/15/11 350,000 327,250 341,250 GulfMark Offshore, Inc. 7.750 07/15/14 300,000 298,725 312,000 Houghton Mifflin Co. 9.875 02/01/13 500,000 527,261 534,375 Huntsman LLC 11.625 10/15/10 163,000 161,068 185,616 Intrawest Corporation 7.500 10/15/13 250,000 250,000 253,125 K 2, Inc. 7.375 07/01/14 150,000 150,579 149,250 Koppers, Inc. 9.875 10/15/13 250,000 250,000 271,250 Lazard LLC 7.125 05/15/15 375,000 374,704 393,784 Leucadia National Corporation 7.000 08/15/13 350,000 356,629 348,250 Liberty Media Corporation 5.700 05/15/13 500,000 475,805 465,881 Lodgenet Entertainment Corporation 9.500 06/15/13 375,000 375,000 407,813 Lyondell Chemical Co. 9.500 12/15/08 265,000 259,155 277,588 M G M Mirage, Inc. 6.000 10/01/09 225,000 227,619 223,593 M S X International, Inc. 11.000 10/15/07 175,000 173,502 174,124 Mac-Gray Corporation 7.625 08/15/15 300,000 300,000 302,250 Magnachip Semiconductor 8.000 12/15/14 50,000 50,000 47,750 Majestic Star Casino LLC 9.500 10/15/10 250,000 250,000 263,124 Manitowoc Company, Inc. 7.125 11/01/13 100,000 100,000 102,750 Mediacom LLC 9.500 01/15/13 750,000 745,887 732,187 Metaldyne Corporation 10.000 11/01/13 340,000 342,028 307,700 28 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Interest Due Principal Market Corporate Public Securities:(A)continued Rate Date Amount Cost Value --------------------------------------------------------------------------------------------------------------------------------- BONDS, CONTINUED Moog, Inc. 6.250% 01/15/15 $ 60,000 $ 60,000 $ 59,100 Nalco Co. 7.750 11/15/11 250,000 250,000 256,874 National Wine & Spirits, Inc. 10.125 01/15/09 25,000 25,331 25,250 Nextel Communications, Inc. 7.375 08/01/15 400,000 409,909 422,126 North Amercan Energy Partners 8.750 12/01/11 200,000 200,000 188,500 O E D Corp/Diamond Jo Company Guarantee 8.750 04/15/12 500,000 492,980 487,500 Offshore Logistics, Inc. 6.125 06/15/13 350,000 350,000 327,250 Pacific Energy Partners 7.125 06/15/14 250,000 252,044 257,500 Pinnacle Foods Group 8.250 12/01/13 225,000 225,000 214,312 Pliant Corporation 11.625 06/15/09 607,802 621,366 644,270 Primedia, Inc. 8.000 05/15/13 500,000 513,738 423,125 Quintiles Transnational Corporation 10.000 10/01/13 250,000 250,000 278,750 Rayovac Corporation 8.500 10/01/13 175,000 175,000 152,688 Rent-A-Center, Inc. 7.500 05/01/10 250,000 250,000 238,750 Rent-Way, Inc. 11.875 06/15/10 450,000 468,627 478,688 Rhodia SA 8.875 06/01/11 250,000 249,834 256,250 Rhodia SA 10.250 06/01/10 250,000 252,352 273,750 Rock-Tenn Co. 8.200 08/15/11 500,000 503,749 507,500 Rogers Wireless, Inc. 7.250 12/15/12 90,000 90,000 94,613 Rogers Wireless, Inc. 7.500 03/15/15 560,000 602,043 604,800 Rogers Wireless, Inc. 8.000 12/15/12 90,000 90,000 95,288 Samsonite Corporation 8.875 06/01/11 500,000 523,498 517,500 Sheridan Acquisition Corporation 10.250 08/15/11 225,000 222,001 231,469 Sports Club Co. 11.375 03/15/06 100,000 97,000 99,125 Tekni-Plex, Inc. 12.750 06/15/10 500,000 483,500 272,500 Telex Communications, Inc. 11.500 10/15/08 250,000 250,000 266,250 Tenet Healthcare Corporation 6.375 12/01/11 250,000 241,250 228,125 Tenet Healthcare Corporation 9.875 07/01/14 350,000 341,859 354,375 Transmontaigne, Inc. 9.125 06/01/10 255,000 250,538 250,538 Triton P C S, Inc. 8.500 06/01/13 500,000 500,000 465,000 Tyco International Group SA 6.375 10/15/11 150,000 148,500 155,789 Unisys Corporation 8.000 10/15/12 90,000 90,000 83,250 United Components, Inc. 9.375 06/15/13 500,000 502,496 497,500 United Rentals, Inc. 7.750 11/15/13 325,000 325,000 316,875 Universal City Florida (C) 9.000 05/01/10 100,000 100,000 100,500 Universal City Florida 8.375 05/01/10 100,000 100,000 97,750 Utilicorp United, Inc. 9.950 02/01/11 500,000 546,427 551,250 Vicorp Restaurants, Inc. 10.500 04/15/11 300,000 296,373 278,250 Vought Aircraft Industries 8.000 07/15/11 650,000 649,072 607,750 Warner Music Group 7.375 04/15/14 125,000 125,000 124,063 Wornick Co. 10.875 07/15/11 350,000 350,000 358,750 ------------ ------------ ------------ TOTAL BONDS $ 28,964,802 29,049,696 28,705,415 ------------ ------------ ------------ 29 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Shares or Interest Due Principal Market Corporate Public Securities:(A)continued Rate Date Amount Cost Value --------------------------------------------------------------------------------------------------------------------------------- COMMON STOCK - 3.31% Copa Holdings SA (B) 3,400 $ 68,000 $ 92,820 DealerTrack Holdings, Inc. (B) 1,600 27,200 33,568 Distributed Energy Systems Corporation (B) 14,000 177,078 105,840 H C I Direct, Inc. (B) 500 -- -- PW Eagle, Inc. (B) 101,236 1 2,075,338 Rent-Way, Inc. (B) 46,432 458,123 296,700 Transmontaigne, Inc. (B) 203,165 598,597 1,340,889 ------------ ------------ TOTAL COMMON STOCK 1,328,999 3,945,155 ------------ ------------ CONVERTIBLE BONDS - 0.68% Citadel Broadcasting Corporation 1.875% 02/15/11 $ 300,000 $ 232,875 $ 232,875 Leucadia National Corporation 3.750 04/15/14 500,000 500,000 576,875 ------------ ------------ ------------ TOTAL CONVERTIBLE BONDS $ 800,000 732,875 809,750 ------------ ------------ ------------ TOTAL CORPORATE PUBLIC SECURITIES $ 31,111,570 $ 33,460,320 ------------ ------------ Interest Due Principal Market Short-Term Securities: Rate/Yield Date Amount Cost Value --------------------------------------------------------------------------------------------------------------------------------- COMMERCIAL PAPER - 12.11% Centex Corporation 4.392% 01/13/06 $ 1,780,000 $ 1,777,184 $ 1,777,184 Consolidated Natural Gas Co. 4.484 01/06/06 2,450,000 2,448,171 2,448,171 DaimlerChrysler NA Holding Corporation 4.443 01/13/06 2,264,000 2,260,378 2,260,378 Florida Power & Light Co. 4.378 01/13/06 1,004,000 1,002,416 1,002,416 Fortune Brands, Inc. 4.503 01/03/06 1,405,000 1,404,473 1,404,473 Kinder Morgan Energy Partners L.P. 4.503 01/04/06 2,435,000 2,433,783 2,433,783 Newell Rubbermaid, Inc. 4.411 01/13/06 608,000 607,034 607,034 Wisconsin Gas Co. 4.337 01/12/06 2,479,000 2,475,422 2,475,422 ------------ ------------ ------------ Total Short-Term Securities $ 14,425,000 $ 14,408,861 $ 14,408,861 ============ ------------ ------------ Total Investments 111.26% $130,912,985 $132,419,896 ============ ------------ Other Assets 4.80 5,708,442 Liabilities (16.06) (19,109,372) ------ ------------ Total Net Assets 100.00% $119,018,966 ====== ============ (A) In each of the convertible note, warrant, convertible preferred 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 12/31/05. See Notes to Consolidated Financial Statements. 30 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Fair Value/ Fair Value/ Industry Classification: Market Value Industry Classification: continued Market Value ------------------------------------------------------------ ------------------------------------------------------------ AEROSPACE - 2.52% CHEMICAL, PLASTICS & RUBBER - 3.05% Argo Tech Corporation $ 435,625 Capital Specialty Plastics, Inc. $ 1,078 Bombardier, Inc. 437,500 Huntsman LLC 185,616 Consolidated Foundries Holdings 1,334,648 Koppers, Inc. 271,250 Esterline Technologies 182,875 Lyondell Chemical Co. 277,588 Vought Aircraft Industries 607,750 NOVA Chemicals Corporation 255,313 ------------ P Q Corporation 637,050 2,998,398 Rhodia SA 530,000 ------------ Tomah Holdings, Inc. 1,476,891 AUTOMOBILE - 7.36% ------------ Gencorp, Inc. 139,750 3,634,786 Goodyear Tire & Rubber Co. 341,250 ------------ Jason, Inc. 1,056,014 CONSUMER PRODUCTS - 7.14% LIH Investors, L.P. 2,469,850 Appleton Papers, Inc. 243,125 Metaldyne Corporation 307,700 Augusta Sportswear Holding Co. 1,144,974 Nyloncraft, Inc. 1,521,832 Euro-Pro Corporation 1,012,732 Qualis Automotive LLC 1,125,086 G F S I, Inc. 337,500 Transtar Holding Company 1,296,620 H C I Direct, Inc. -- United Components, Inc. 497,500 K 2, Inc. 149,250 ------------ Maverick Acquisition Company 648,060 8,755,602 Rayovac Corporation 152,688 ------------ Royal Baths Manufacturing Company 603,203 BEVERAGE, DRUG & FOOD - 4.95% Savage Sports Holding, Inc. 1,128,482 Beta Brands Ltd. -- The Tranzonic Companies 1,898,746 Cains Foods, L.P. 500,413 Walls Industries, Inc. 1,176,039 Del Monte Corporation 212,500 Winsloew Furniture, Inc. -- Dominos, Inc. 113,905 ------------ Eagle Pack Pet Foods, Inc. 611,819 8,494,799 National Wine & Spirits, Inc. 25,250 ------------ Nonni's Food Company 1,195,390 CONTAINERS, PACKAGING & GLASS - 2.75% Pinnacle Foods Group 214,312 Paradigm Packaging, Inc. 1,209,526 River Ranch Fresh Foods LLC 1,029,873 Pliant Corporation 644,270 Specialty Foods Group, Inc. -- Tekni-Plex, Inc. 272,500 Vicorp Restaurants, Inc. 278,250 Vitex Packaging, Inc. 1,151,652 Vitality Foodservice, Inc. 1,346,779 ------------ Wornick Co. 358,750 3,277,948 ------------ ------------ 5,887,241 DISTRIBUTION - 3.63% ------------ Corvest Group, Inc. 1,072,513 BROADCASTING & ENTERTAINMENT - 2.55% Kele and Associates, Inc. 1,320,726 C S C Holdings, Inc. 248,750 O R S Nasco Holding, Inc. 1,327,223 Cablevision Systems Corporation 454,500 QualServ Corporation 601,485 Charter Communications Op LLC 497,500 Strategic Equipment & Supply Corporation, Inc. -- Citadel Broadcasting Corporation 232,875 ------------ Liberty Media Corporation 465,881 4,321,947 Lodgenet Entertainment Corporation 407,813 ------------ Mediacom LLC 732,187 DIVERSIFIED/CONGLOMERATE, MANUFACTURING - 6.55% ------------ Activant Solutions, Inc. 768,375 3,039,506 AmerCable, Inc. 625,306 ------------ Arrow Tru-Line Holdings, Inc. 1,096,791 BUILDINGS & REAL ESTATE - 2.91% Coining Corporation of America LLC 1,065,660 AW C Holding Company 1,451,934 Dexter Magnetics Technologies, Inc. 554,304 Adorn, Inc. 1,402,171 Douglas Dynamics LLC 313,625 Texas Industries, Inc. 36,313 Evans Consoles, Inc. -- TruStile Doors, Inc. 577,820 Justrite Manufacturing Acquisition Co. 832,877 ------------ Rock-Tenn Co. 507,500 3,468,238 Truck Bodies & Equipment International 1,874,480 ------------ Tyco International Group SA 155,789 ------------ 7,794,707 ------------ 31 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Fair Value/ Fair Value/ Industry Classification: Market Value Industry Classification: continued Market Value ------------------------------------------------------------ ------------------------------------------------------------ DIVERSIFIED/CONGLOMERATE, SERVICE - 6.38% HEALTHCARE, EDUCATION & CHILDCARE - 3.74% Abitibi-Consolidated, Inc. $ 476,250 A T I Acquisition Company $ 1,056,558 Allied Waste NA 516,250 American Hospice Management Holding LLC 1,418,634 CapeSuccess LLC 2,512 ICOS Corporation 301,875 Chemed Corporation 643,500 Interactive Health LLC 405,000 Diversco, Inc./DHI Holdings, Inc. 1,252,858 MedAssist, Inc. 138,975 Dwyer Group, Inc. 1,410,703 Q L T, Inc. 269,544 Keystone North America, Inc. 171,462 Quintiles Transnational Corporation 278,750 Mac-Gray Corporation 302,250 Tenet Healthcare Corporation 582,500 Moss, Inc. 1,022,965 ------------ M S X International, Inc. 174,124 4,451,836 Service Corporation International 496,250 ------------ U S M Holdings Corporation 625,041 HOME & OFFICE FURNISHINGS, HOUSEWARES, Universal City Florida 198,250 AND DURABLE CONSUMER PRODUCTS - 3.41% Wesco International, Inc. 300,938 Connor Sport Court International, Inc. 1,035,984 ------------ Home Decor Holding Company 1,261,603 7,593,353 Samsonite Corporation 517,500 ------------ U-Line Corporation 1,240,832 ELECTRONICS - 4.15% ------------ A E S Corporation 654,344 4,055,919 Arrow Electronics, Inc. 509,002 ------------ Directed Electronics, Inc. 1,796,246 LEISURE, AMUSEMENT, ENTERTAINMENT - 1.82% Distributed Energy Systems 105,840 Intrawest Corporation 253,125 Electronic Data Systems Corporation 531,299 Keepsake Quilting, Inc. 815,855 Precision Dynamics, Inc. 646,182 M G M Mirage, Inc. 223,593 Siebe PLC 311,500 Majestic Star Casino LLC 263,124 Texas Genco LLC 378,875 O E D Corp/Diamond Jo Company Guarantee 487,500 ------------ Warner Music Group 124,063 4,933,288 ------------ ------------ 2,167,260 FARMING & AGRICULTURE - 0.00% ------------ Protein Genetics, Inc. -- MACHINERY - 8.66% Aearo Co. 228,375 FINANCIAL SERVICES - 3.90% C & M Conveyor, Inc. 1,306,032 BCP Crystal US Holding Corporation 394,938 Integration Technology Systems, Inc. 711,753 Bombardier Capital, Inc. 500,000 Manitowoc Company, Inc. 102,750 Dollar Financial Group 334,750 Maxon Corporation 1,492,275 East River Ventures I, L.P. 5,423 PW Eagle, Inc. 2,075,338 Ford Motor Credit Co. 1,101,335 Safety Speed Cut Manufacturing Company, Inc. 1,394,189 General Motors Acceptance Corporation 670,970 Synventive Equity LLC 14,171 Highgate Capital LLC 737 Tronair, Inc. 1,558,983 Lazard LLC 393,784 Tubular Textile Machinery 1,419,935 Leucadia National Corporation 925,125 ------------ T C W Leveraged Income Trust, L.P. 313,972 10,303,801 Victory Ventures LLC 2 ------------ ------------ MEDICAL DEVICES/BIOTECH - 2.69% 4,641,036 Beacon Medical Products, Inc. 1,197,236 ------------ Coeur, Inc. 640,244 E X C Acquisition Corporation 59,692 MicroGroup, Inc. 1,303,440 ------------ 3,200,612 ------------ MINING, STEEL, IRON & NON PRECIOUS METALS - 0.05% Better Minerals & Aggregates 54,525 ------------ 32 MassMutual Paticipation Investors CONSOLIDATED SCHEDULE OF INVESTMENTS December 31, 2005 Fair Value/ Fair Value/ Industry Classification: continued Market Value Industry Classification: continued Market Value ------------------------------------------------------------ ------------------------------------------------------------ OIL AND GAS - 5.89% TELECOMMUNICATIONS - 3.69% C & J Spec-Rent Services, Inc. $ 1,775,533 Cincinnati Bell, Inc. $ 541,063 Chesapeake Energy Corporation 672,750 Intelsat Bermuda, Ltd. 481,156 Clayton Williams Energy, Inc. 360,000 ITC^DeltaCom, Inc. 1,418,261 GulfMark Offshore, Inc. 312,000 Nextel Communications, Inc. 422,126 Mustang Ventures Company 1,185,877 Rogers Wireless, Inc. 794,701 North American Energy Partners 188,500 Telex Communications, Inc. 266,250 Offshore Logistics, Inc. 327,250 Triton P C S, Inc. 465,000 Pacific Energy Partners 356,000 ------------ Pogo Producing Co. 243,750 4,388,557 Transmontaigne, Inc. 1,591,427 ------------ ------------ TRANSPORTATION - 1.21% 7,013,087 Copa Holdings SA 92,820 ------------ Hertz Corporation 25,750 PHARMACEUTICALS - 1.12% Tangent Rail Corporation 1,321,740 CorePharma LLC 1,334,060 ------------ Enzymatic Therapy, Inc. 2,967 1,440,310 ------------ ------------ 1,337,027 UTILITIES - 1.43% ------------ Atlas Pipeline Partners 100,875 PUBLISHING/PRINTING - 1.64% Markwest Energy 230,000 American Media Operation, Inc. 403,750 Moog, Inc. 59,100 Cadmus Communications Corporation 359,625 Nalco Co. 256,874 Houghton Mifflin Co. 534,375 Sierra Pacific Resources 328,350 Primedia, Inc. 423,125 Tenaska Alabama Partners L.P. 176,891 Sheridan Acquisition Corporation 231,469 Utilicorp United, Inc. 551,250 ------------ ------------ 1,952,344 1,703,340 ------------ ------------ RETAIL STORES - 4.46% WASTE MANAGEMENT/POLLUTION - 0.93% Blockbuster, Inc. 242,000 Terra Renewal Services, Inc. 1,110,009 Neff Motivation, Inc. 625,727 ------------ Neiman Marcus Group, Inc. 609,750 Total Corporate Restricted Olympic Sales, Inc. 2,198,813 and Public Securities - 99.15% $118,011,035 Rent-A-Center, Inc. 238,750 ============ Rent-Way, Inc. 775,388 Sports Club Co. 99,125 See Notes to Consolidated Financial Statements. TVI, Inc. 202,500 United Rentals, Inc. 316,875 ------------ 5,308,928 ------------ TECHNOLOGY - 0.57% Cymer, Inc. 440,438 DealerTrack Holdings, Inc. 33,568 Magnachip Semiconductor 47,750 Sungard Data Systems 77,625 Unisys Corporation 83,250 ------------ 682,631 ------------ 33 MassMutual Paticipation Investors NOTES TO CONSOLIDATED FINANCIAL STATEMENTS December 31, 2005 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 such income, and capital appreciation, by investing primarily in a portfolio of privately placed below investment grade, long-term corporate debt obligations purchased directly from their issuers, at least half of which normally will include equity features. 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 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 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, absent an exemption from registration, 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"). 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 as of 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 thereafter used 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 in each quarter to value 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, the Trust's investment adviser. In making valuations, the Trustees will consider Babson Capital's reports 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 $74,973,531 (62.99% of net assets) as of December 31, 2005 whose values have been determined by the Trustees in the absence of readily ascertainable market values. Due to the inherent uncertainty of valuation, those 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. 34 MassMutual Paticipation Investors NOTES TO CONSOLIDATED FINANCIAL STATEMENTS December 31, 2005 The values for corporate public securities are stated at the last reported sales price or at prices based upon quotations obtained from brokers and dealers as of December 31, 2005, 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. 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 discount on bonds held. 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. 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 long-term gains as undistributed and pay the federal capital gains taxes thereon, or distribute all or a portion of such net gains. For the year ended December 31, 2005, the Trust had a net realized taxable long-term capital gain balance of $9,234,268, which the Trustees voted to retain and pay the federal capital gain tax thereon. The Trust has accrued a provision for federal taxes of $3,231,994 on the Statement of Operations related to the retained realized capital gains. In 2005, the Trust re-classified a total of $638,367 to undistributed net investment income. $204,699 was re-classified from accumulated net realized gain on investments and $433,668 was re-classified from additional paid in capital to more accurately display the Trust's capital financial position or a taxbasis in accordance with accounting principles generally accepted in the United States of America. These re-classifications had no impact on net asset value. 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's 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 year ended December 31, 2005, the MMPI Subsidiary Trust has accrued tax expense on net income of $27,826, on net realized gains of $318,869 and deferred tax expense on net unrealized gains of $175,414. 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. The tax character of distributions paid during the years ended December 31, 2005 and 2004 was as follows. DISTRIBUTIONS PAID FROM: 2005 2004 ----------------------------- Ordinary Income $ 9,818,640 $ 10,613,225 As of December 31, 2005, the components of distributable earnings on a tax basis included $968,724 of undistributed ordinary income. Such distributions and distributable earnings on a tax basis are determined in conformity with income tax regulations, which may differ from accounting principles generally accepted in the United States of America. Net investment income of the Trust as presented under accounting principles generally accepted in the United States of America differs from distributable earnings due to earnings from the MMPI Subsidiary Trust as well as timing differences in the recognition of income on certain investments. 35 MassMutual Paticipation Investors NOTES TO CONSOLIDATED FINANCIAL STATEMENTS December 31, 2005 3. INVESTMENT ADVISORY AND ADMINISTRATIVE SERVICES FEE 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 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. 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. In addition, during the year ended December 31, 2005, the Trust was reimbursed $22,443 by an affiliate of Babson Capital due to a trading error. 4. SENIOR SECURED INDEBTEDNESS A. NOTE PAYABLE: 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 year ended December 31, 2005, the Trust incurred total interest expense on the Note of $696,000. 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 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 Notes proposed to be redeemed. B. REVOLVING CREDIT AGREEMENT: The Trust entered into a $15,000,000 Revolving Credit Agreement with Bank of America (formerly Fleet National Bank) (the "Agent Bank") dated May 29, 1997, which had a stated matured on May 31, 2004. The maturity date of this loan was extended to May 31, 2007, and its terms amended and restated pursuant to the First Amended and Restated Revolving Credit Agreement (the "Revolver") dated May 27, 2004, between the Trust and the Agent Bank. The Revolver bears interest payable quarterly in arrears at a per annum rate that varies depending upon whether the Trust requests a Base Rate Loan or LIBOR Rate Loan. Interest on Base Rate loans equals the higher of: (i) the annual "Base Rate" as set periodically by the Agent Bank and (ii) the most recent Federal Funds Effective Rate plus .50% per annum. Per annum interest on LIBOR Rate Loans equals .60% plus the London Inter Bank Offered Rate ("LIBOR") rate, divided by 1 minus LIBOR Reserve Rate. The Trust also incurs expense on the undrawn portion of the total Revolver at a rate of .25% per annum. As of December 31, 2005, there were no outstanding loans against the Revolver. The average daily outstanding balance was $10,500,000 and the average blended rate of interest attributable to the Revolver was 3.27%. For the year ended December 31, 2005, the Trust incurred total interest expense on the Revolver of $190,044, plus $22,685 related to the undrawn portion. 5. PURCHASES AND SALES OF INVESTMENTS FOR THE YEAR COST OF INVESTMENTS ENDED 12/31/2005 ACQUIRED -------------------------------------------------------------------------- Corporate restricted securities $ 30,337,054 Corporate public securities 7,789,156 PROCEEDS FROM SALES OR MATURITIES -------------------------------------------------------------------------- Corporate restricted securities $ 50,471,728 Corporate public securities 7,593,513 -------------------------------------------------------------------------- The aggregate cost of investments is substantially the same for financial reporting and federal income tax purposes as of December 31, 2005. The net unrealized appreciation of investments for financial reporting and federal tax purposes as of December 31, 2005 is $1,506,911 and consists of $12,021,463 appreciation and $10,514,552 depreciation. Net unrealized appreciation of investments of the Statement of Assets and Liabilities reflects the balance net of a deferred tax accrual of $175,414 on net unrealized gains in the MMPI Subsidiary Trust. 36 MassMutual Paticipation Investors NOTES TO CONSOLIDATED FINANCIAL STATEMENTS December 31, 2005 6. QUARTERLY RESULTS OF INVESTMENT OPERATIONS (UNAUDITED) Amount Per Share ----------------------------------------------------------------------------- March 31, 2005 ----------------------------------------------------------------------------- Investment income $ 2,833,525 Net investment income 2,192,726 $ 0.23 Net realized and unrealized gain on investments (net of taxes) 1,002,116 0.10 ----------------------------------------------------------------------------- June 30, 2005 ----------------------------------------------------------------------------- Investment income 2,971,531 Net investment income 2,302,919 0.23 Net realized and unrealized gain on investments (net of taxes) 4,574,450 0.47 ----------------------------------------------------------------------------- September 30, 2005 ----------------------------------------------------------------------------- Investment income 3,010,835 Net investment income 2,391,949 0.25 Net realized and unrealized gain on investments (net of taxes) 2,781,680 0.29 ----------------------------------------------------------------------------- December 31, 2005 ----------------------------------------------------------------------------- Investment income 3,395,654 Net investment income (net of taxes) 2,755,688 0.28 Net realized and unrealized gain on investments (net of taxes) 2,298,349 0.23 7. AGGREGATE REMUNERATION PAID TO OFFICERS, TRUSTEES AND THEIR AFFILIATED PERSONS During 2005, the Trust paid its Trustees aggregate remuneration of $111,625. During this period the Trust did not pay any compensation to any of its Trustees who are "interested persons" (as defined by the 1940 Act) of the Trust. The Trust classifies Messers Crandall and Joyal and former Trustee Stuart H. Reese as "interested persons" of the Trust. All of the Trust's officers are employees of Babson Capital or MassMutual. Pursuant to the Investment Advisory and Administrative Services Contract, the Trust does not compensate its officers who are employees of Babson Capital or MassMutual. Mr. Crandall, one of the Trust's Trustees is an "affiliated person" (as defined by the 1940 Act) of MassMutual and Babson Capital. The Trust did not make any payments to Babson Capital for the year ended December 31, 2005, other than amounts payable to Babson Capital pursuant to the Investment Advisory and Administrative Services Contract. For the year ended December 31, 2005, the Trust paid the following amounts to MassMutual, exclusive of interest expense on the Note explained in Footnote 4.A: Preparation of the Trust's Quarterly and Annual Reports to Shareholders $ 15,439 Preparation of Certain of the Trust's Shareholder communications 526 Preparation of the Trust's Annual Proxy Statements 1,084 ----------------------------------------------------------------------------- $ 17,049 ----------------------------------------------------------------------------- 8. CONTINGENCIES The Trust, together with other investors including MassMutual, was a plaintiff in litigation in connection with private placement investments made by the Trust in Sharp International Corporation ("Sharp"). Three managing shareholders of Sharp, which is currently being liquidated in Chapter 11 liquidation proceedings, have pleaded guilty to criminal fraud charges. Initially, two separate civil lawsuits were brought in New York state court in an attempt to recover damages for lost investment funds from Sharp's working capital lender and auditors. The first lawsuit involving Sharp's working capital lender was dismissed prior to trial. An appeal of this dismissal was unsuccessful. The second lawsuit against Sharp's auditors was settled in the Spring of 2005. Under the terms of the settlement agreement, the Trust would recover all legal fees it incurred to prosecute the lawsuit, as well as additional amounts. A related lawsuit brought by the Trustee of Sharp bankruptcy estate against Sharp's auditors on behalf of unsecured creditors, including the Trust, was also settled at the same time. Total proceeds to be distributed to the Trust as a result of the settlement of these two lawsuits against Sharp's auditors are expected to be approximately $950,000. To date $934,353 has been received by the Trust. 9. CERTIFICATIONS (UNAUDITED) As required under New York Stock Exchange ("NYSE") Corporate Governance Rules, the Trust's principal executive officer has certified to the NYSE that he was not aware, as of the certification date, of any violation by the Trust of the NYSE's Corporate Governance listing standards. In addition, as required by Section 302 of the Sarbanes-Oxley Act of 2002 and related SEC rules, the Trust's principal executive and principal financial officers have made quarterly certifications, included in filings with the Securities and Exchange Commission on Forms N-CSR and N-Q, relating to, among other things, the Trust's disclosure controls and procedures and internal control over financial reporting, as applicable. 37 MassMutual Participation Investors REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM The Shareholders and Board of Trustees of MassMutual Participation Investors We have audited the accompanying statement of assets and liabilities of MassMutual Participation Investors (the Trust), including the schedule of investments, as of December 31, 2005, and the related statements of operations and cash flows for the year then ended and the statements of changes in net assets and financial highlights for each of the years in the two-year period then ended. These financial statements and financial highlights are the responsibility of the Trust's management. Our responsibility is to express an opinion on these financial statements and financial high-lights based on our audits. The financial highlights for each of the years in the three-year period ended December 31, 2003 were audited by other independent registered public accountants whose report, dated February 6, 2004, expressed an unqualified opinion on those financial highlights. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. Our procedures included verification of securities owned as of December 31, 2005 by counting of securities at the custodian and confirmation of securities owned as of December 31, 2005, by correspondence with the custodian and brokers, or by other appropriate auditing procedures where replies from brokers were not received. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of MassMutual Participation Investors as of December 31, 2005, and the results of its operations, its cash flows, the changes in its net assets, and the financial highlights for the years described above in conformity with accounting principles generally accepted in the United States of America. /s/ KPMG LLP Boston, Massachusetts February 6, 2006 38 MassMutual Participation Investors INTERESTED TRUSTEES PRINCIPAL PORTFOLIOS POSITION OCCUPATION(S) OVERSEEN OTHER NAME (AGE), WITH OFFICE TERM/LENGTH DURING PAST IN FUND DIRECTORSHIPS ADDRESS THE TRUST OF TIME SERVED 5 YEARS COMPLEX HELD BY DIRECTOR ------------------------------------------------------------------------------------------------------------------------------------ ROGER W. CRANDALL* (41) Trustee 3 years/ Executive Vice President 2 Trustee, Chairman (since Massachusetts Mutual (since 2005) 7 months** and Chief Investment 2005), President Life Insurance Company Officer (since 2005) of (2003-2005), and Vice 1295 State Street Chairman 1 year/ MassMutual; and Chairman President (2002-2003), of Springfield, MA 01111 (since 2005) 7 months*** (since 2005), Vice the Trust; Director Chairman (2005), Member (since 2004), Babson NOMINEE FOR TRUSTEE of the Board of Managers Capital Europe Limited (since 2004), Director (an institutional (2003-2004), and Managing debt-fund manager); Director of Babson Director (since 2005), Capital (2000-2005). Babson Capital Japan KK (a Japanese registered investment adviser); Non- Executive Director (since 2005), Baring Asset Management Limited (an investment manager/adviser); Chairman (since 2005), Cornerstone Real Estate Advisers LLC (an investment adviser); Director (since 1996), HYP Management LLC (LLC manager); Director (since 2003), MassMutual Corporate Value Partners Limited (investment company); Director (since 2003), MassMutual Corporate Value Limited (investment company); Director (since 2005), MassMutual Holdings (Bermuda) Ltd. (holding company); Director (since 2005), MassMutual Holding MSC, Inc. (holding company); Director (since 1996), MMHC Investment LLC (investment company); Director (since 2004), MML Assurance, Inc. (a New York insurance company); Director (since 2005), Oppenheimer Acquisition Corp. (holding company); Director (since 2004), Jefferies Babson Finance LLC (a joint venture between Jefferies Group Inc. and Babson Capital); Director (since 2004), Great Lakes LLC (investment company); Director (since 1999), SAAR Holdings CDO Ltd. (investment company); Trustee (since 2003), President (2003-2005), and Chairman (since 2005), MMCI Subsidiary Trust and MMPI Subsidiary Trust; and Trustee (since 2005), Chairman (since 2005), President (2003-2005), and Vice President (2002-2003), of MassMutual Corporate Investors (closed-end investment company advised by Babson Capital). * MR. CRANDALL IS AN "INTERESTED PERSON" OF THE TRUST AND BABSON CAPITAL (AS DEFINED BY THE 1940 ACT) BECAUSE OF HIS POSITION AS AN OFFICER OF THE TRUST; AN EXECUTIVE OFFICER OF MASSMUTUAL; AND CHAIRMAN AND MEMBER OF THE BOARD OF MANAGERS OF BABSON CAPITAL. ** MR. CRANDALL WAS APPOINTED TO THE BOARD OF TRUSTEES ON JULY 15, 2005 TO FILL THE VACANT SEAT CREATED BY THE RESIGNATION OF STUART H. REESE, THE TERM OF WHICH EXPIRES IN 2006. *** MR. CRANDALL WAS ELECTED CHAIRMAN OF THE BOARD OF TRUSTEES ON JULY 15, 2005. 39 MassMutual Participation Investors INTERESTED TRUSTEES PRINCIPAL PORTFOLIOS POSITION OCCUPATION(S) OVERSEEN OTHER NAME (AGE), WITH OFFICE TERM/LENGTH DURING PAST IN FUND DIRECTORSHIPS ADDRESS THE TRUST OF TIME SERVED 5 YEARS COMPLEX HELD BY DIRECTOR ------------------------------------------------------------------------------------------------------------------------------------ ROBERT E. JOYAL* (61) Trustee 3 years/ President (2001-2003), 33 President (1999-2003) and MassMutual (since 2003) 1 year, Managing Director Trustee (since 2003), of Participation Investors 10 months (2000-2001), and the Trust; Director 1500 Main Street Executive Director (since 2006), Jefferies Suite 600 (1999-2000) of Babson Group Inc. (global Springfield, MA 01115 Capital; and Executive investment bank and Director (1997- 1999) of institutional securities MassMutual. firm); Director (since 2005), York Enhanced Strategies Fund (a closed-end investment company); Director (since 2003), Pemco Aviation Group, Inc. (aircraft maintenance and overhaul); Trustee (since 2003), MassMutual Select Funds, formerly MassMutual Institutional Funds, (an open-end investment company advised by MassMutual); Trustee (since 2003), MML Series Investment Fund (an open-end investment company advised by MassMutual); Trustee (1998- 2003), Senior Vice President (1998-2001) and President (2001-2003), MMCI Subsidiary Trust and MMPI Subsidiary Trust; and President (1999-2003), Trustee (since 2003), MassMutual Corporate Investors (closed-end investment company advised by Babson Capital). * MR. JOYAL RETIRED AS PRESIDENT OF BABSON CAPITAL IN JUNE 2003. HE CONTINUES TO SERVE AS A DIRECTOR OR TRUSTEE OF SEVERAL ENTITIES AFFILIATED WITH MASSMUTUAL, BABSON CAPITAL'S INDIRECT PARENT COMPANY. ACCORDINGLY, THE TRUST CLASSIFIES MR. JOYAL AS AN "INTERESTED PERSON" OF THE TRUST AND BABSON CAPITAL (AS DEFINED BY THE 1940 ACT). 40 MassMutual Participation Investors INDEPENDENT TRUSTEES PRINCIPAL PORTFOLIOS POSITION OCCUPATION(S) OVERSEEN OTHER NAME (AGE), WITH OFFICE TERM/LENGTH DURING PAST IN FUND DIRECTORSHIPS ADDRESS THE TRUST OF TIME SERVED 5 YEARS COMPLEX HELD BY DIRECTOR ------------------------------------------------------------------------------------------------------------------------------------ MICHAEL H. BROWN (49) Trustee 3 years/ Private Investor; and 2 Trustee (since 2005), MassMutual (since 2005) 7 months* Managing Director MassMutual Corporate Participation Investors (1994-2005), Morgan Investors (a closed-end 1500 Main Street Stanley. investment company advised Suite 600 by Babson Capital). Springfield, MA 01115 ------------------------------------------------------------------------------------------------------------------------------------ JACK A. LAUGHERY (71) Trustee 3 years/ President and Partner 2 Director (since 1993), MassMutual (since 1996) 10 months (since 1996), Papa John's International Participation Investors Laughery Investments (food service companies); 1500 Main Street (private investments). and Trustee (since 1996), Suite 600 MassMutual Corporate Springfield, MA 01115 Investors (closed-end investment company advised by Babson Capital). * MR. BROWN WAS ELECTED BY THE BOARD OF TRUSTEES TO FILL A NEWLY CREATED BOARD SEAT ON JULY 15, 2005. 41 MassMutual Participation Investors INDEPENDENT TRUSTEES PRINCIPAL PORTFOLIOS POSITION OCCUPATION(S) OVERSEEN OTHER NAME (AGE), WITH OFFICE TERM/LENGTH DURING PAST IN FUND DIRECTORSHIPS ADDRESS THE TRUST OF TIME SERVED 5 YEARS COMPLEX HELD BY DIRECTOR ------------------------------------------------------------------------------------------------------------------------------------ CORINE T. NORGAARD (68) Trustee 3 years/ President, (2004-2005), 32 Trustee (since 2005), MML MassMutual (since 1998) 10 months Thompson Enterprises Real Series Investment Fund II Participation Investors Estate Investment; and (an open-end investment 1500 Main Street Dean (1996-2004), Barney company advised by Suite 600 School of Business, MassMutual); Trustee Springfield, MA 01115 University of Hartford. (since 2004), MassMutual Premier Funds, formerly The DLB Fund Group (an open-end investment company advised by MassMutual); Trustee (since 1993), ING Series Fund (investment company); Director (since 1992), ING Variable Series Fund; and Trustee (since 1998), MassMutual Corporate Investors (a closed-end investment company advised by Babson Capital). ------------------------------------------------------------------------------------------------------------------------------------ DONALD E. BENSON (75) Trustee 3 years/ Executive Vice President 2 Director (since 1997), MassMutual (since 1988) 1 year, and Director (since 1992), MAIR Holdings, Inc. Participation Investors 10 months Marquette Financial (commuter airline holding 1500 Main Street Companies (financial company); Director (since Suite 600 services); Partner (since 1997), National Mercantile Springfield, MA 01115 1996), Benson Family Bancorp (bank holding Limited Partnership No. 1 company); and Trustee and Benson Family Limited (since 1986), MassMutual Partnership No. 2 Corporate Investors (investment partnerships); (closed-end investment and Partner (1987-2004), company advised by Babson Benson, Pinckney, Oates Capital). Partnership (building partnership). 42 MassMutual Participation Investors INDEPENDENT TRUSTEES PRINCIPAL PORTFOLIOS POSITION OCCUPATION(S) OVERSEEN OTHER NAME (AGE), WITH OFFICE TERM/LENGTH DURING PAST IN FUND DIRECTORSHIPS ADDRESS THE TRUST OF TIME SERVED 5 YEARS COMPLEX HELD BY DIRECTOR ------------------------------------------------------------------------------------------------------------------------------------ DONALD GLICKMAN (72) Trustee 3 years/ Chairman (since 1992), 2 Director (since 1984), MassMutual (since 1992) 1 year, Donald Glickman and Monro Muffler Brake, Inc. Participation Investors 10 months Company, Inc. (investment (automobile repair 1500 Main Street banking); and Partner service); Director (since Suite 600 (since 1992), J.F. Lehman 1998), MSC Software, Corp. Springfield, MA 01115 & Co. (private (simulation software); investments). Director (2002-2006), OAOT, Inc. (ITC Services); and Trustee (since 1992), MassMutual Corporate Investors (closed-end investment company advised by Babson Capital). ------------------------------------------------------------------------------------------------------------------------------------ MARTIN T. HART (70) Trustee 3 years/ Private Investor; and 2 Director (since 2004), MassMutual (since 1991) 2 years, President and Director Texas Roadhouse, Inc. Participation Investors 10 months (since 1983), H Investment (operates restaurant 1500 Main Street Company LLC (family chain); Director (since Suite 600 partnership). 1999), ValueClick Inc. Springfield, MA 01115 (internet advertising company); Director (since 2002), Spectranetics Corp. NOMINEE (medical device company); FOR TRUSTEE and Trustee (since 1991), MassMutual Corporate Investors (closed-end investment company advised by Babson Capital). 43 MassMutual Participation Investors OFFICERS OF THE TRUST PRINCIPAL POSITION OCCUPATION(S) NAME (AGE), WITH OFFICE TERM/LENGTH DURING PAST ADDRESS THE TRUST OF TIME SERVED 5 YEARS ------------------------------------------------------------------------------------------------------------------------------------ CLIFFORD M. NOREEN (48) President 1 year/ President (since 2005), Vice President (1993-2005) of the Trust; MassMutual 7 months Managing Director (since 2000) of Babson Capital; Managing Director Participation Investors (1996-1999) of MassMutual; Trustee (since 2005), and President 1500 Main Street (since 2005), MMCI Subsidiary Trust and MMPI Subsidiary Trust; and Suite 600 President (since 2005), Vice President (1993-2005), MassMutual Springfield, MA 01115 Corporate Investors. ------------------------------------------------------------------------------------------------------------------------------------ STEPHEN L. KUHN (59) Vice 1 year/ Vice President (since 1989) and Secretary (since 1980) of the Trust; MassMutual President, 7 months Senior Vice President (since 1999), Deputy General Counsel (since Participation Investors Secretary, 1998), and Secretary (since 2005) of MassMutual; General Counsel and 1500 Main Street and Chief Secretary (2000-2006) of Babson Capital; Secretary (since 1998), Suite 600 Legal MMCI Subsidiary Trust and MMPI Subsidiary Trust; and Vice President Springfield, MA 01115 Officer (since 1989) and Secretary (since 1980), MassMutual Corporate Investors. ------------------------------------------------------------------------------------------------------------------------------------ JAMES M. ROY (43) Vice 1 year/ Vice President and Chief Financial Officer (since 2005), Treasurer MassMutual President 7 months (2003-2005) and Associate Treasurer (1999-2003) of the Trust; Participation Investors and Chief Director (since 2000) of Babson Capital; Associate Director 1500 Main Street Financial (1996-1999) of MassMutual; Trustee (since 2005), Treasurer (since Suite 600 Officer 2005), and Controller (2003-2005), MMCI Subsidiary Trust and MMPI Springfield, MA 01115 Subsidiary Trust; and Vice President and Chief Financial Officer (since 2005), Treasurer (2003-2005) and Associate Treasurer (1999-2003), MassMutual Corporate Investors. ------------------------------------------------------------------------------------------------------------------------------------ JOHN T. DAVITT, JR. (38) Comptroller 1 year/ Comptroller (since 2001) of the Trust; Director (since 2000) of MassMutual 7 months Babson Capital; Associate Director (1997-1999) of MassMutual; Participation Investors Controller (since 2005), MMCI Subsidiary Trust and MMPI Subsidiary 1500 Main Street Trust; and Comptroller (since 2001), MassMutual Corporate Investors. Suite 600 Springfield, MA 01115 ------------------------------------------------------------------------------------------------------------------------------------ MELISSA M. LAGRANT (32) Chief 6 months/ Chief Compliance Officer (since 2006) of the Trust; Managing MassMutual Compliance 1 month* Director (since 2005) of Babson Capital; Vice President and Senior Participation Investors Officer Compliance Trading Manager (2003-2005), Loomis, Sayles & Company, 1500 Main Street L.P.; Assistant Vice President-Business Risk Management Group Suite 600 (2002-2003), and Assistant Vice President-Investment Compliance Springfield, MA 01115 (2001-2002), Zurich Scudder Investments/Deutsche Asset Management; and Chief Compliance Officer (since 2006), MassMutual Corporate Investors. ------------------------------------------------------------------------------------------------------------------------------------ LAURA L. GRANT (33) Treasurer 1 year/ Treasurer (since 2005) of the Trust; Associate Director (since 2000) MassMutual 7 months of Babson Capital; and Treasurer (since 2005), MassMutual Corporate Participation Investors Investors. 1500 Main Street Suite 600 Springfield, MA 01115 * MELISSA LAGRANT WAS ELECTED CHIEF COMPLIANCE OFFICER BY THE BOARD ON JANUARY 20, 2006 TO FILL THE VACANCY CREATED BY MARY ELLEN WESNESKI'S RESIGNATION AS CHIEF COMPLIANCE OFFICER ON NOVEMBER 18, 2005. 44 MassMutual Participation Investors [PHOTO APPEARS HERE] -------------------------------------------------------------------------------- Members of the Board of Trustees -------------------------------------------------------------------------------- Donald Glickman Chairman, Donald Glickman & Company, Inc. Robert E. Joyal Retired President of Babson Capital Management LLC Jack A. Laughery President and Partner, Laughery Investments Michael H. Brown Private Investor Donald E. Benson* Executive Vice President and Director, Marquette Financial Companies Corine T. Norgaard* President, Thompson Enterprises Real Estate Investment Roger W. Crandall Executive Vice President and Chief Investment Officer, Massachusetts Mutual Life Insurance Company Martin T. Hart* Private Investor *Member of the Audit Committee 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 Share-holder Financial Services Inc., the Transfer Agent, in accordance with the Plan, unless such share-holder 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. 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 any way, 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 8021 7-3673. -------------------------------------------------------------------------------- Officers -------------------------------------------------------------------------------- Roger W. Crandall James M. Roy Michael P. Hermsen Michael L. Klofas Laura L. Grant CHAIRMAN VICE PRESIDENT & VICE PRESIDENT VICE PRESIDENT TREASURER CHIEF FINANCIAL OFFICER Clifford M. Noreen Mary Wilson Kibbe Richard E. Spencer, II John T. Davitt, Jr. PRESIDENT Stephen L. Kuhn VICE PRESIDENT VICE PRESIDENT COMPTROLLER VICE PRESIDENT, SECRETARY & CHIEF LEGAL OFFICER Melissa M. LaGrant CHIEF COMPLIANCE OFFICER [LOGO] MassMutual Participation Investors DB1036 206 ITEM 2. CODE OF ETHICS. The Registrant adopted a Code of Ethics for Senior Financial Officers (the "Code") on October 17, 2003, which is available on the Registrant's website at www.babsoncapital.com/mpv. During the period covered by this Form N-CSR, there were no amendments to, or waivers from, the Code. ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. The Registrant's Board of Trustees has determined that Mr. Donald E. Benson, a Trustee of the Registrant and a member of its Audit Committee, is an audit committee financial expert. Mr. Benson is "independent" for purposes of this Item 3 as required by applicable regulation. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. FEES BILLED TO THE REGISTRANT KPMG LLP KPMG LLP Year Ended Year Ended December 31, December 31, 2005 2004 ---------- ---------- Audit Fees $ 39,000 $ 32,500 Audit-Related Fees 5,200 5,000 Tax Fees 32,900 33,500 All Other Fees 0 0 ---------- ---------- Total Fees $ 77,100 $ 71,000 ========== ========== NON-AUDIT FEES BILLED TO BABSON CAPITAL AND MASSMUTUAL KPMG LLP KPMG LLP Year Ended Year Ended December 31, December 31, 2005 2004 ---------- ---------- Audit-Related Fees $1,271,816 $ 362,400 Tax Fees 0 0 All Other Fees 0 400,000 ---------- ---------- Total Fees $1,271,816 $ 762,400 ========== ========== The category "Audit Related Fees" reflects fees billed by KPMG for services reasonably related to the audit and tax services rendered to the Registrant, Babson Capital Management LLC ("Babson Capital") and Massachusetts Mutual Life Insurance Company ("MassMutual"), such as SAS 70 review, a Sarbanes-Oxley Readiness Assessment and agreed upon procedures reports. Preparation of Federal, state and local income tax and compliance work are representative of the fees billed in the "Tax Fees" category. The category "All Other Fees" represents fees billed by KPMG for tax consulting rendered to Babson Capital and MassMutual. The Sarbanes-Oxley Act of 2002 and its implementing regulations allows the Registrant's Audit Committee to establish a pre-approval policy for certain services rendered by the Registrant's independent accountants. During 2005, the Registrant's Audit Committee approved all of the services rendered to the Registrant by KPMG and did not rely on such a pre-approval policy for any such services. The Audit Committee reviewed the aggregate fees billed for professional services rendered by KPMG for the Registrant and for the non-audit services provided to Babson Capital, and Babson Capital's parent, MassMutual. As part of this review, the Audit Committee considered whether the provision of such non-audit services were compatible with maintaining the principal accountant's independence. The 2004 fees billed represent final 2004 amounts, which may differ from the preliminary figures available as of the filing date of the Trust's 2005 Annual Form N-CSR and includes, among other things, fees for services that may not have been billed as of the filing date of the Trust's 2005 Annual Form N-CSR, but are now properly included in the 2004 fees billed to the Trust, Babson Capital, and MassMutual. ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS. The Registrant maintains an Audit Committee composed exclusively of Trustees of the Registrant who qualify as "independent" Trustees under the current listing standards of the New York Stock Exchange and the rules of U.S. Securities and Exchange Commission. The Committee operates pursuant to a written Audit Committee Charter, which is available (1) on the Registrant's website, www.babsoncapital.com/mpv; and (2) without charge, upon request, by calling, toll-free 866-399-1516. The current members of the Audit Committee are Donald E. Benson, Martin T. Hart, and Corine T. Norgaard. ITEM 6. SCHEDULE OF INVESTMENTS Not applicable for this filing. ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED END MANAGEMENT INVESTMENT COMPANIES. The Registrant's Board of Trustees delegated proxy voting responsibilities relating to voting securities held by the Registrant to its investment adviser, Babson Capital Management LLC ("Babson Capital"). A summary of Babson Capital's proxy voting policies and procedures is set forth below. Summary of Babson Capital's Proxy Voting Policy ----------------------------------------------- Babson Capital views the voting of proxies as an integral part of its investment management responsibility and believes, as a general principle, that proxies should be voted solely in the best interests of its clients (i.e. prudently and in a manner believed by Babson to best protect and enhance an investor's returns). To implement this general principle, it is Babson Capital's policy to generally vote proxies in accordance with the recommendations of Institutional Shareholder Services ("ISS"), a recognized authority on proxy voting and corporate governance, or, in cases where ISS has not made any recommendations with respect to a proxy, in accordance with ISS's proxy voting guidelines. Babson Capital recognizes, however, that there may be times when Babson Capital believes that it will be in the best interests of clients holding the securities to (1) vote against ISS's recommendations or (2) in cases where ISS has not provided Babson Capital with any recommendations with respect to a proxy, vote against ISS's proxy voting guidelines. Babson Capital may vote, in whole or part, against ISS's recommendations or ISS's proxy voting guidelines, as applicable, if such vote is authorized by the Policy. The procedures set forth in the Policy are designed to ensure that votes against ISS's recommendations or proxy voting guidelines have been made in the best interests of clients and are not the result of any material conflict of interest (a "Material Conflict"). Summary of Babson Capital's Proxy Voting Procedures --------------------------------------------------- Babson Capital has (1) established a Proxy Committee that is responsible for the implementation and governance of the Policy and (2) designated Proxy Administrators who will receive and post proxies for voting with ISS. In accordance with the Policy, Babson Capital will generally vote all client proxies in accordance with ISS's recommendation or proxy voting guidelines, unless a person authorized by the Proxy Committee (each a "Proxy Analyst") determines that it is in its clients' best interest to vote against ISS's recommendation or proxy voting guidelines. In these cases, Babson Capital will vote against ISS's recommendation or proxy voting guidelines, so long as no other Proxy Analyst reviewing such proxy disagrees with such recommendation, and no known Material Conflict is identified by the Proxy Analyst(s) or the Proxy Administrator. Otherwise, the proxy is to be submitted to a member of the Proxy Committee, who shall determine how to vote the proxy unless (i) the Proxy Administrator has identified a Babson Capital Material Conflict or (ii) said Proxy Committee member has identified a Material Conflict. In such cases, the proxy shall be submitted to the Proxy Committee, which may authorize a vote against ISS's recommendation or proxy voting guidelines only if the Proxy Committee determines that such vote is in the clients' best interests. No employee, officer or director of Babson Capital or its affiliates (other than those assigned such responsibilities under the Policy) may influence how Babson Capital votes any proxy, unless such person has been requested to provide such assistance by a Portfolio Manager or Proxy Committee member and has disclosed any known Material Conflict. Any pre-vote communications prohibited by the Policy shall be reported to the Proxy Committee member prior to voting and to Babson Capital's General Counsel. Obtaining a Copy of the Policy ------------------------------ The full text of Babson Capital's Policy is available (1) without charge, upon request, by calling 1-866-399-1516 or (2) on the Registrant's website, www.babsoncapital.com/mpv. ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES. The following disclosure item is made as of the date of this Form N-CSR unless otherwise indicated. PORTFOLIO MANAGER. Clifford M. Noreen serves as the President of the Registrant (since 2005) and as its Portfolio Manager. Mr. Noreen began his service to the Registrant in 1993 as a Vice President. With over 24 years of industry experience, Mr. Noreen is a Managing Director of Babson Capital Management LLC ("Babson Capital") and head of Babson Capital's Corporate Securities Group, where he oversees all corporate credit related investments, including public and private bonds, mezzanine, and private equity investments, as well as structured credit products. Mr. Noreen joined Massachusetts Mutual Life Insurance Company ("MassMutual"), Babson Capital's parent company, in 1985 and began leading its High Yield Team in 1992, where he was responsible for oversight of all public high yield portfolios. In 2004, Mr. Noreen assumed responsibility for Babson Capital's Public Corporate Credit Group, which included the Investment Grade and High Yield Institutional Fixed Income teams. Mr. Noreen also presently serves as President of MassMutual Corporate Investors, another closed-end investment company advised by Babson Capital. Mr. Noreen holds a B.A. from the University of Massachusetts and an M.B.A from American International College. PORTFOLIO MANAGEMENT TEAM. Mr. Noreen has primary responsibility for overseeing the investment of the Registrant's portfolio, with the day-to-day investment management responsibility of the Registrant's portfolio being shared with the following Babson Capital investment professionals (together with the Portfolio Manager, the "Portfolio Team"). Michael P. Hermsen, Michael L. Klofas, and Richard E. Spencer II are each a Vice President of the Registrant and a managing Director of Babson Capital. Together they are responsible for managing Babson Capital's Mezzanine Investment and Private Equity Investments team within the Corporate Securities Group, which is responsible for finding, analyzing, negotiating and servicing mezzanine private placement securities for the Registrant. Mr. Hermsen joined MassMutual in 1990 and has been an officer of the Registrant since 1992. Previously, he worked at Teachers Insurance and Annuity Association where he was a generalist private placement analyst. At MassMutual and then Babson Capital, Mr. Hermsen has analyzed and invested in traditional private placements, high yield public and private bonds, and leveraged bank loans. He has also been responsible for managing a small portfolio of distressed investments. Since 1993, he has focused on originating, analyzing, structuring and documenting mezzanine and private equity investments. He holds a B.A. from Bowdoin College and an M.B.A. from Columbia University. Mr. Klofas joined MassMutual in 1988 and has been an officer of the Registrant since 1989. Prior to joining MassMutual, he spent two years at a small venture capital firm and two years at a national public accounting firm. At MassMutual and then Babson Capital, Mr. Klofas has analyzed and invested in traditional private placements and high yield public bonds. He also spent four years leading Babson Capital's workout and restructuring activities. Since 1993, he has focused on originating, analyzing, structuring and documenting mezzanine and private equity investments. Mr. Klofas holds a B.A. from Brandeis University and an M.B.A. from Babson College as well as a Certified Public Accountant designation. Mr. Spencer joined MassMutual in 1989 after three years as a corporate loan analyst at a major New England bank. He has been an officer of Registrant since 1990. At MassMutual and then Babson Capital, Mr. Spencer has analyzed and invested in traditional private placements, high yield public and private bonds, leveraged bank loans, mezzanine debt and private equity. From 1993 to 1999, he was the lead restructuring professional at Babson Capital. Since 1999, Mr. Spencer has been focused on the origination, analysis, structuring and documentation of mezzanine and private equity investments. He holds a B.A. from Bucknell University and an M.B.A. from the State University of New York at Buffalo. Starting in 2006, Jill A. Fields assumed primary day-to-day responsibility for managing the Registrant's public high yield and investment grade fixed income portfolio. Ms. Fields, a Managing Director of Babson Capital with over 19 years of industry experience, is responsible for portfolio management of Babson Capital's high yield total return strategy. Prior to joining Babson Capital in 1997, she was a credit analyst at Shawmut National Bank, and the Director of Corporate Bond Research at Hartford Life Insurance Group. Ms. Fields holds a B.S. from Pennsylvania State University and an M.B.A. from the University of Connecticut. OTHER ACCOUNTS MANAGED BY THE PORTFOLIO TEAM. The members of the Registrant's Portfolio Team also have primary responsibility for the day-to-day management of other Babson Capital advisory accounts, including, among others, closed-end and open-end investment companies, private investment funds, MassMutual-affiliated accounts, as well as separate accounts for institutional clients. These advisory accounts are identified below. NUMBER OF ACCOUNTS APPROXIMATE TOTAL WITH ASSET SIZE OF NUMBER APPROXIMATE PERFORMANCE- PERFORMANCE- PORTFOLIO ACCOUNT OF TOTAL ASSET BASED BASED ADVISORY TEAM CATEGORY ACCOUNTS SIZE(A) ADVISORY FEE FEE ACCOUNTS(A) ------------ --------------------- -------- ------------ ------------ -------------- Clifford M. Registered Investment Noreen(B) Companies 2 $431.7 million 1 $256.3 million ----------------------------------------------------------------------------------------- Other Pooled Investment Vehicles 2 $112.6 million 2 $112.6 million ----------------------------------------------------------------------------------------- Other Accounts 2 $133.7 million 2 $133.7 million ----------------------------------------------------------------------------------------- Jill A. Registered Investment Fields Companies 3 $790.5 million 1 $256.3 million ----------------------------------------------------------------------------------------- Other Pooled Investment Vehicles 3 $214.3 million 3 $214.3 million ----------------------------------------------------------------------------------------- Other Accounts 3 $361.2 million 2 $133.9 Million ----------------------------------------------------------------------------------------- Michael P. Registered Investment Hermsen Companies 1 $256.3 million 1 $256.3 million ----------------------------------------------------------------------------------------- Other Pooled Investment Vehicles 5 $341.2 million 5 $341.2 million ----------------------------------------------------------------------------------------- Other Accounts 1(C) $1.1 billion N/A N/A ----------------------------------------------------------------------------------------- Michael L. Registered Investment Klofas Companies 1 $256.3 million 1 $256.3 million ----------------------------------------------------------------------------------------- Other Pooled Investment Vehicles 5 $341.2 million 5 $341.2 million ----------------------------------------------------------------------------------------- Other Accounts 1(C) $1.1 billion N/A N/A ----------------------------------------------------------------------------------------- Richard E. Registered Investment Spencer II Companies 1 $256.3 million 1 $256.3 million ----------------------------------------------------------------------------------------- Other Pooled Investment Vehicles 5 $341.2 million 5 $341.2 million ----------------------------------------------------------------------------------------- Other Accounts 1(C) $1.1 billion N/A N/A (A) Account asset size has been calculated as of December 31, 2005. (B) Mr. Noreen, as the head of Babson Capital's Corporate Securities Group, has overall responsibility for all corporate credit related investments, including public and private bonds, mezzanine, and private equity investments, as well as structured credit products managed by Babson Capital. Except for the accounts noted in the table above, Mr. Noreen is not primarily responsible for the day-to-day management of the other accounts managed by Babson Capital's Corporate Securities Group. (C) The listed account and managed assets represent that portion of the general investment account of MassMutual and C.M. Life Insurance Company for which an individual Portfolio Team member has primary day-to-day responsibility. As of December 31, 2005, Babson Capital's total general investment account assets under management were $56.9 billion dollars. MATERIAL CONFLICTS OF INTEREST. The potential for material conflicts of interest may exist as the members of the Portfolio Team have responsibilities for the day-to-day management of multiple accounts. These conflicts may be heightened to the extent the individual, Babson Capital and/or an affiliate has an investment in one or much of such accounts or an interest in the performance of such accounts. Babson Capital has identified (and summarized below) areas where material conflicts of interest are most likely to arise, and has adopted policies and procedures that it believes are reasonably designed to address such conflicts. It is possible that an investment opportunity may be suitable for both the Registrant and other accounts managed by a member of the Portfolio Team, but may not be available in sufficient quantities for both the Registrant and the other accounts to participate fully. Similarly, there may be limited opportunity to sell an investment held by the Registrant and another account. A conflict may arise where a member of the Portfolio Team may have an incentive to treat an account preferentially as compared to the Registrant because the account pays Babson Capital a performance-based fee or a member of the Portfolio Team, Babson Capital, or an affiliate has an interest in the account. Babson Capital has adopted an investment allocation policy and trade allocation procedures to address allocation of portfolio transactions and investment opportunities across multiple clients. These policies are designed to achieve fair and equitable treatment of all clients over time, and specifically prohibit allocations based on performance of an account, the amount or structure of the management fee, performance fee or profit sharing allocations, participation or investment by an employee, Babson Capital or an affiliate, whether the account is public, private, proprietary or third party. Additionally, the Registrant, MassMutual, Babson Capital, MassMutual Corporate Investors, and any private investment company advised or sub-advised by Babson Capital have obtained a blanket order from the Securities and Exchange Commission pursuant to Section 17(d), and Rule 17(d)-1 thereunder, of the Investment Company Act of 1940, as amended, which sets forth the conditions by which the entities can engage in private placement co-investment activities. Potential material conflicts of interest may also arise related to the knowledge and timing of the Registrant's trades, investment opportunities and broker selection. A member of the Portfolio Team will have information about the size, timing and possible market impact of the Registrant's trades. It is theoretically possible that a member of the Portfolio Team could use this information for his or her personal advantage or the advantage of other accounts he manages or the possible detriment of the Registrant. For example, a member of the Portfolio Team could front run a fund's trade or short sell a security for an account immediately prior to the Registrant's sale of that security. To address these conflicts, Babson Capital has adopted policies and procedures governing employees' personal securities transactions, the use of short sales, and trading between the Registrant and other accounts managed by members of the Portfolio Team or accounts owned by Babson Capital or its affiliates. With respect to securities transactions for the Registrant, Babson Capital determines which broker to use to execute each order, consistent with its duty to seek best execution of the transaction. Babson Capital manages certain other accounts, however, where Babson Capital may be limited by the client with respect to the selection of brokers or directed to trade such client's transactions through a particular broker. In these cases, trades for a fund in a particular security may be placed separately from, rather than aggregated with, such other accounts. Placing separate transaction orders for a security may temporarily affect the market price of the security or otherwise affect the execution of the transaction to the possible detriment of a fund or the other account(s) involved. Babson Capital has policies and procedures that address best execution and directed brokerage. Members of the Portfolio Team may also face other potential conflicts of interest in managing the Registrant, and the above is not a complete description of every conflict of interest that could be deemed to exist in managing both the Registrant and the other accounts listed above. COMPENSATION. The current Babson Capital compensation and incentive program for investment professionals is designed to attract, motivate and retain high-performing individuals. To help Babson Capital make informed decisions, the Company participates in annual compensation surveys of investment management firms using McLagan Partners, in addition to other industry specific resources. The firms selected for periodic peer-group comparisons typically have similar asset size or business mix. Annually, a review is conducted of total compensation versus market, to ensure that individual pay is competitive with the defined overall market. The compensation package for the members of the Portfolio Team is comprised of a market-driven base salary, a performance-driven annual bonus, and discretionary long-term incentives. The performance-driven bonus is based on the performance of the accounts managed by the members of the Portfolio Team relative to appropriate benchmarks, including with respect to the Registrant, to the Lehman Brothers Intermediate U.S. Credit and the S & P Industrial Index, in addition to the Russell 2000 Index and Lehman Brothers U.S. Corporate High Yield Index. Performance of the Registrant, like other accounts Portfolio Team members manage, are evaluated on a pre-tax basis, and are reviewed over one and three-year periods, with greater emphasis given to the latter. There are other factors that affect bonus awards to a lesser extent, such as client satisfaction, teamwork, the assets under management, and the overall success of Babson Capital. Such factors are considered as a part of the overall annual bonus evaluation process by the management of Babson Capital. Long-Term incentives are designed to share with participants the longer-term value created in Babson Capital. Long-term incentives may take the form of deferred cash awards (including deferred cash awards that provide a portfolio manager with the economic equivalent of a "shareholder" interest in the firm by linking the value of the award to a formula which ties to the value of the business), and/or, in the case of a portfolio manager who manages a private investment fund with a performance fee, a deferred cash award or a direct profit sharing interest that results in the manager receiving amounts based on the amount of the performance fee paid by such fund. These long-term incentives vest over time and are granted annually, based upon the same criteria used to determine the performance-driven annual bonus detailed above. Because the Portfolio Team members are generally responsible for multiple accounts (including the Registrant), they are compensated on the overall performance of the accounts that they manage, rather than a specific account, except for the portion of compensation relating to any performance fee award. BENEFICIAL OWNERSHIP. As of December 31, 2005, members of the Portfolio Team beneficially owned the following dollar range of equity securities in the Registrant: DOLLAR RANGE OF BENEFICIALLY OWNED* PORTFOLIO TEAM EQUITY SECURITIES OF THE REGISTRANT ---------------------- ----------------------------------- Clifford M. Noreen None Jill A. Fields None Michael P. Hermsen $10,001-$50,000 Michael L. Klofas None Richard E. Spencer II None * Beneficial ownership has been determined in accordance with Rule 16a-1(a)(2) under the Securities Exchange Act of 1934, as amended. ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS. Not Applicable for this filing. ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS. Not Applicable for this filing. ITEM 11. CONTROLS AND PROCEDURES. (a) The principal executive officer and principal financial officer of the Registrant evaluated the effectiveness of the Registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940 (the "Act")) as of a date within 90 days of the filing date of this report and based on that evaluation have concluded that such disclosure controls and procedures are effective to provide reasonable assurance that material information required to be disclosed by the Registrant on Form N-CSR is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms. (b) There were no changes in the Registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the Act) during the Registrant's second fiscal half-year that have materially affected, or are reasonably likely to materially affect, the Registrant's internal control over financial reporting. ITEM 12. EXHIBITS. (a)(1) ANY CODE OF ETHICS, OR AMENDMENTS THERETO, THAT IS THE SUBJECT OF DISCLOSURE REQUIRED BY ITEM 2, TO THE EXTENT THAT THE REGISTRANT INTENDS TO SATISFY THE ITEM 2 REQUIREMENTS THROUGH THE FILING OF AN EXHIBIT. None. (a)(2) A SEPARATE CERTIFICATION FOR EACH PRINCIPAL EXECUTIVE OFFICER AND PRINCIPAL FINANCIAL OFFICER OF THE REGISTRANT AS REQUIRED BY RULE 30a-2 UNDER THE ACT. Attached hereto as EX-99.31.1 Attached hereto as EX-99.31.2 (a)(3) ANY WRITTEN SOLICITATION TO PURCHASE SECURITIES UNDER RULE 23c-1 UNDER THE ACT (17 CFR 270.23c-1) SENT OR GIVEN DURING THE PERIOD COVERED BY THE REPORT BY OR ON BEHALF OF THE REGISTRANT TO 10 OR MORE PERSONS. Not Applicable for this filing. (b) CERTIFICATIONS PURSUANT TO RULE 302-2(b) UNDER THE ACT. Attached hereto as EX-99.32 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant): MassMutual Participation Investors ---------------------------------- By: /s/ Clifford M Noreen ---------------------------------- Clifford M Noreen, President ---------------------------------- Date: March 10, 2006 ---------------------------------- Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated. By: /s/ Clifford M Noreen ---------------------------------- Clifford M Noreen, President ---------------------------------- Date: March 10, 2006 ---------------------------------- By: /s/ James M. Roy ---------------------------------- James M. Roy, Vice President, and Chief Financial Officer ---------------------------------- Date: March 10, 2006 ----------------------------------