SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                    Form 13F
                               FORM 13F COVER PAGE

Report for the Calendar Year or Quarter Ended:  December 31, 2007
                                               ------------------


Check here if Amendment [ ]; Amendment Number:
                                               ------

This Amendment (Check only one.): [ ] is a restatement.
                                  [ ] adds new holdings entries.

Institutional Investment Manager Filing this Report:

Name:    Sun Life Financial Inc.
         ------------------------------------------
Address: 150 King Street West
         ------------------------------------------
         Toronto, Ontario, Canada, M5H 1J9
         ------------------------------------------
Form 13F File Number: 28-05799
                      -----------------------------

The institutional investment manager filing this report and the person by whom
it is signed hereby represent that the person signing the report is authorized
to submit it, that all information contained herein is true, correct and
complete, and that it is understood that all required items, statements,
schedules, lists, and tables, are considered integral parts of this form.


Person Signing this Report on Behalf of Reporting Manager:

Name:  J.M.A. Anderson
       ---------------------------------------------------------
Title: Executive Vice-President and Chief Investment Officer
       ---------------------------------------------------------
Phone: 416-979-6217
       ---------------------------------------------------------
Signature, Place, and Date of Signing:


  /s/ J.M.A. Anderson       Toronto, Ontario,   February 14, 2008
  -----------------------   ------------------  -----------------
     [Signature]            [City, State]            [Date]

Report Type (Check only one.):

[ ]  13F HOLDINGS REPORT. (Check here if all holdings of this reporting
     manager are reported in this report.)

[ ]  13F NOTICE. (Check here if no holdings reported are in this report, and all
     holdings are reported by other reporting manager(s).)

[x]  13F COMBINATION REPORT. (Check here if a portion of the holdings for this
     reporting manager are reported in this report and a portion are reported by
     other reporting manager(s).)

List of Other Managers Reporting for this Manager:
[If there are no entries in this list, omit this section.]

Form 13F File Number                   Name

028-06597                              McLean Budden
-------------------------              -----------------------------------
028-04968                              MFS
-------------------------              -----------------------------------

Report Summary:

Number of Other Included Managers:                           2
                                        ----------------------
Form 13F Information Table Entry Total:                    217
                                        ----------------------
Form 13F Information Table Value Total:           US$1,835,979
                                        ----------------------
                                               (thousands)

List of Other Included Managers:

Provide a numbered list of the name(s) and Form 13F file number(s) of all
institutional investment managers with respect to which this report is filed,
other than the manager filing this report.

[If there are no entries in this list, state "NONE" and omit the column headings
and list entries.]

  No.   Form 13F File Number          Name

    1   28-12046                      Sun Capital Advisers LLC.
  ----  ---------------------------   --------------------------------------

    2   28-12047                      Sun Life Assurance Company of Canada
  ----  ---------------------------   --------------------------------------



                      FORM 13F INFORMATION TABLE
                           DECEMBER 31, 2007




COLUMN 1                          COLUMN 2     COLUMN 3  COLUMN 4       COLUMN 5       COLUMN 6  COLUMN 7       COLUMN 8
------------------------------------------------------------------------------------------------------------------------------
                                                                                                            VOTING AUTHORITY
                                                           VALUE    SHRS OR  SH/ PUT/ INVESTMENT   OTHER  --------------------
NAME OF ISSUER                 TITLE OF CLASS  CUSIP     (x$1000)   PRN AMT  PRN CALL DISCRETION MANAGERS SOLE    SHARED  NONE
------------------------------------------------------------------------------------------------------------------------------
                                                                                         
3M Corporation                 COM            88579Y101   1,448       17,171 SH          SHARED         2         17,171
3M Corporation                 COM            88579Y101   3,735       44,293 SH          SHARED         1         44,293
Abbott Laboratories            COM            002824100   1,414       25,183 SH          SHARED         2         25,183
Abbott Laboratories            COM            002824100   3,699       65,874 SH          SHARED         1         65,874
Acme Packet Inc                COM            004764106   2,261      179,577 SH          SHARED         2        179,577
Acme Packet Inc                COM            004764106   5,745      456,277 SH          SHARED         1        456,277
Acme Packet Inc                COM            004764106  17,557    1,394,516 SH          SHARED         1      1,394,516
AERCAP HOLDINGS NV             SHS            N00985106   1,360       65,176 SH          SHARED         2         65,176
AERCAP HOLDINGS NV             SHS            N00985106   3,508      168,096 SH          SHARED         1        168,096
Alexandria Real Estate Equit   COM            015271109     693        6,819 SH          SHARED         2          6,819
Alexandria Real Estate Equit   COM            015271109   5,041       49,589 SH          SHARED         1         49,589
Allstate Corp                  COM            020002101   1,313       25,147 SH          SHARED         2         25,147
Allstate Corp                  COM            020002101   3,404       65,172 SH          SHARED         1         65,172
Altria Group Inc               COM            02209S103   1,817       24,042 SH          SHARED         2         24,042
Altria Group Inc               COM            02209S103   4,699       62,166 SH          SHARED         1         62,166
American Express Co            COM            025816109   1,956       37,599 SH          SHARED         2         37,599
American Express Co            COM            025816109   5,002       96,148 SH          SHARED         1         96,148
Amgen Inc                      COM            031162100   1,242       26,736 SH          SHARED         2         26,736
Amgen Inc                      COM            031162100   3,209       69,102 SH          SHARED         1         69,102
Analog Devices Inc             COM            032654105   1,375       43,373 SH          SHARED         2         43,373
Analog Devices Inc             COM            032654105   3,553      112,096 SH          SHARED         1        112,096
Anheuser-Busch Co Inc          COM            035229103   1,724       32,945 SH          SHARED         2         32,945
Anheuser-Busch Co Inc          COM            035229103   4,459       85,197 SH          SHARED         1         85,197
AT&T Inc                       COM            00206R102   3,272       78,720 SH          SHARED         2         78,720
AT&T Inc                       COM            00206R102   8,446      203,223 SH          SHARED         1        203,223
AvalonBay Communities Inc      COM            053484101     406        4,312 SH          SHARED         2          4,312
AvalonBay Communities Inc      COM            053484101   2,927       31,097 SH          SHARED         1         31,097
Bank of America Corp           COM            060505104   3,997       96,881 SH          SHARED         2         96,881
Bank of America Corp           COM            060505104  10,370      251,338 SH          SHARED         1        251,338
Best Buy Company Inc           COM            086516101   1,812       34,423 SH          SHARED         2         34,423
Best Buy Company Inc           COM            086516101   4,684       88,961 SH          SHARED         1         88,961
Boeing Company                 COM            097023105   1,658       18,954 SH          SHARED         2         18,954
Boeing Company                 COM            097023105   4,278       48,911 SH          SHARED         1         48,911
Bookham Inc                    COM            09856E105  10,472    4,400,000 SH          SHARED         1      4,400,000
Boston Scientific              COM            101137107  10,467      900,000 SH          SHARED         1        900,000
Boston Scientific Corp         COM            101137107   2,656      228,335 SH          SHARED         2        228,335
Boston Scientific Corp         COM            101137107   6,843      588,352 SH          SHARED         1        588,352



Bristol-Myers Squibb           COM            110122108   1,424       53,711 SH          SHARED         2         53,711
Bristol-Myers Squibb           COM            110122108   3,674      138,544 SH          SHARED         1        138,544
BROADCOM CORP-CL A             CL A           111320107   1,190       45,529 SH          SHARED         2         45,529
BROADCOM CORP-CL A             CL A           111320107   3,065      117,269 SH          SHARED         1        117,269
Brocade Communications Sys     COM            111621306   2,920      397,763 SH          SHARED         2        397,763
Brocade Communications Sys     COM            111621306   7,524    1,025,093 SH          SHARED         1      1,025,093
Chevron Corporation            COM            166764100   4,619       49,493 SH          SHARED         2         49,493
Chevron Corporation            COM            166764100  11,898      127,487 SH          SHARED         1        127,487
Coca-Cola Company              COM            191216100   1,853       30,194 SH          SHARED         2         30,194
Coca-Cola Company              COM            191216100   4,788       78,022 SH          SHARED         1         78,022
Comcast Corp                   CL A           20030N101   1,304       71,429 SH          SHARED         2         71,429
Comcast Corp                   CL A           20030N101   3,362      184,098 SH          SHARED         1        184,098
Concurrent Computer Corp       COM            206710204     802      965,688 SH          SHARED         2        965,688
Concurrent Computer Corp       COM            206710204   2,031    2,447,158 SH          SHARED         1      2,447,158
ConocoPhillips                 COM            20825C104   2,042       23,129 SH          SHARED         2         23,129
ConocoPhillips                 COM            20825C104   5,261       59,580 SH          SHARED         1         59,580
Cosi Inc                       COM            22122P101     694      309,909 SH          SHARED         2        309,909
Cosi Inc                       COM            22122P101   1,794      800,817 SH          SHARED         1        800,817
CVS Caremark Corporation       COM            126650100   1,995       50,183 SH          SHARED         2         50,183
CVS Caremark Corporation       COM            126650100   5,155      129,674 SH          SHARED         1        129,674
Developers Diversified Realty  COM            251591103     434       11,347 SH          SHARED         2         11,347
Developers Diversified Realty  COM            251591103   3,161       82,557 SH          SHARED         1         82,557
Dominion Resources Inc         COM            25746U109   1,622       34,184 SH          SHARED         2         34,184
Dominion Resources Inc         COM            25746U109   4,194       88,398 SH          SHARED         1         88,398
DOMTAR CORP                    COM            257559104   1,505      195,647 SH          SHARED         2        195,647
DOMTAR CORP                    COM            257559104   3,875      503,941 SH          SHARED         1        503,941
Douglas Emmett Inc-w/i         COM            25960P109     110        4,856 SH          SHARED         2          4,856
Douglas Emmett Inc-w/i         COM            25960P109     799       35,323 SH          SHARED         1         35,323
Dow Chemical Company           COM            260543103   1,401       35,535 SH          SHARED         2         35,535
Dow Chemical Company           COM            260543103   3,613       91,664 SH          SHARED         1         91,664
Duke Energy Corp               COM            26441C105   1,635       81,074 SH          SHARED         2         81,074
Duke Energy Corp               COM            26441C105   4,226      209,497 SH          SHARED         1        209,497
Dupont (EI) Nemours and Co     COM            263534109   1,498       33,981 SH          SHARED         2         33,981
Dupont (EI) Nemours and Co     COM            263534109   3,871       87,799 SH          SHARED         1         87,799
Eastgroup Properties           COM            277276101     438       10,455 SH          SHARED         2         10,455
Eastgroup Properties           COM            277276101   3,193       76,294 SH          SHARED         1         76,294
Eastman Kodak Co               COM            277461109   1,075       49,150 SH          SHARED         2         49,150
Eastman Kodak Co               COM            277461109   2,778      127,010 SH          SHARED         1        127,010
Eli Lilly & Co                 COM            532457108   1,372       25,691 SH          SHARED         2         25,691
Eli Lilly & Co                 COM            532457108   3,544       66,376 SH          SHARED         1         66,376
Equity Residential Properties  SH BEN INT     29476L107     365        9,998 SH          SHARED         2          9,998



Equity Residential Properties  SH BEN INT     29476L107   2,621       71,859 SH          SHARED         1         71,859
Exelon Corporation             COM            30161N101   1,911       23,402 SH          SHARED         2         23,402
Exelon Corporation             COM            30161N101   4,945       60,566 SH          SHARED         1         60,566
Exxon Mobil Corp               COM            30231G102   7,396       78,936 SH          SHARED         2         78,936
Exxon Mobil Corp               COM            30231G102  19,166      204,564 SH          SHARED         1        204,564
Fedex Corp                     COM            31428X106   1,071       12,009 SH          SHARED         2         12,009
Fedex Corp                     COM            31428X106   2,768       31,037 SH          SHARED         1         31,037
FINISAR Corporation            COM            31787A101   1,884    1,299,487 SH          SHARED         1      1,299,487
General Electric Company       COM            369604103   4,352      117,392 SH          SHARED         2        117,392
General Electric Company       COM            369604103  11,234      303,037 SH          SHARED         1        303,037
General Growth Properties      COM            370021107     438       10,636 SH          SHARED         2         10,636
General Growth Properties      COM            370021107   3,185       77,351 SH          SHARED         1         77,351
Genworth Financial Inc.        COM            37247D106  58,184    2,286,200 SH          SHARED         1      2,286,200
Gmh Communities Trust          COM            36188G102     375       67,957 SH          SHARED         2         67,957
Gmh Communities Trust          COM            36188G102   2,723      493,251 SH          SHARED         1        493,251
Goldman Sachs Group Inc        COM            38141G104   2,531       11,769 SH          SHARED         2         11,769
Goldman Sachs Group Inc        COM            38141G104   6,549       30,454 SH          SHARED         1         30,454
HCP Inc                        COM            40414L109     500       14,364 SH          SHARED         2         14,364
HCP Inc                        COM            40414L109   3,587      103,134 SH          SHARED         1        103,134
Highwoods Properties Inc       COM            431284108     495       16,864 SH          SHARED         2         16,864
Highwoods Properties Inc       COM            431284108   3,607      122,770 SH          SHARED         1        122,770
Honeywell International Inc    COM            438516106   1,996       32,418 SH          SHARED         2         32,418
Honeywell International Inc    COM            438516106   5,149       83,629 SH          SHARED         1         83,629
Host Hotels and Resorts Inc    COM            44107P104     332       19,489 SH          SHARED         2         19,489
Host Hotels and Resorts Inc    COM            44107P104   2,437      143,007 SH          SHARED         1        143,007
IBM Corp                       COM            459200101   1,986       18,372 SH          SHARED         2         18,372
IBM Corp                       COM            459200101   5,131       47,465 SH          SHARED         1         47,465
Ishares                        MSCI UTD KINGD 464286699   2,931      127,500 SH          SHARED         1        127,500
Ishares                        MSCI FRANCE    464286707   4,175      110,200 SH          SHARED         1        110,200
Ishares                        MSCI GERMAN    464286806     935       26,500 SH          SHARED         1         26,500
Ishares                        MSCI MEXICO    464286822   1,590       28,400 SH          SHARED         1         28,400
Ishares                        MSCI JAPAN     464286848   7,426      564,706 SH          SHARED         1        564,706
IShares MSCI EAFE              IDX            464287465  33,664      428,838 SH          SHARED         2        428,838
Ishares Tr                     MSCI EAFE IDX  464287465 242,866    3,093,835 SH          SHARED         1      3,093,835
Johnson & Johnson              COM            478160104   2,350       35,226 SH          SHARED         2         35,226
Johnson & Johnson              COM            478160104   6,071       91,014 SH          SHARED         1         91,014
JP Morgan Chase                COM            46625H100   2,985       68,379 SH          SHARED         2         68,379
JP Morgan Chase                COM            46625H100   7,717      176,787 SH          SHARED         1        176,787
Kimberly-Clark Corp            COM            494368103   1,626       23,449 SH          SHARED         2         23,449
Kimberly-Clark Corp            COM            494368103   4,205       60,642 SH          SHARED         1         60,642
Kimco Realty Corp              COM            49446R109     590       16,200 SH          SHARED         2         16,200



Kimco Realty Corp              COM            49446R109   4,334      119,084 SH          SHARED         1        119,084
Kraft Foods Inc                CL A           50075N104     543       16,636 SH          SHARED         2         16,636
Kraft Foods Inc                CL A           50075N104   1,404       43,020 SH          SHARED         1         43,020
Lexington Realty Trust         COM            529043101     513       35,289 SH          SHARED         2         35,289
Lexington Realty Trust         COM            529043101   3,727      256,344 SH          SHARED         1        256,344
Lincoln National Corp          COM            534187109   1,300       22,321 SH          SHARED         2         22,321
Lincoln National Corp          COM            534187109   3,349       57,528 SH          SHARED         1         57,528
Lowe's Companies               COM            548661107   1,129       49,898 SH          SHARED         2         49,898
Lowe's Companies               COM            548661107   2,917      128,963 SH          SHARED         1        128,963
Macerich Company               COM            554382101     667        9,380 SH          SHARED         2          9,380
Macerich Company               COM            554382101   4,850       68,250 SH          SHARED         1         68,250
Macy's Inc                     COM            55616P104   1,008       38,973 SH          SHARED         2         38,973
Macy's Inc                     COM            55616P104   2,606      100,722 SH          SHARED         1        100,722
Marvell Technology Group       ORD            G5876H105   2,483      177,608 SH          SHARED         2        177,608
Marvell Technology Group       ORD            G5876H105   6,399      457,710 SH          SHARED         1        457,710
Marvell Technology Group Ltd   COM            G5876H105  12,582      900,000 SH          SHARED         1        900,000
Massey Energy Co               COM            576206106   4,656      130,242 SH          SHARED         2        130,242
Massey Energy Co               COM            576206106  12,030      336,515 SH          SHARED         1        336,515
Mattel Inc                     COM            577081102   1,446       75,969 SH          SHARED         2         75,969
Mattel Inc                     COM            577081102   3,726      195,682 SH          SHARED         1        195,682
Medical Properties Trust Inc   COM            58463J304     384       37,682 SH          SHARED         2         37,682
Medical Properties Trust Inc   COM            58463J304   2,785      273,358 SH          SHARED         1        273,358
Merck & Co Inc                 COM            589331107   2,275       39,146 SH          SHARED         2         39,146
Merck & Co Inc                 COM            589331107   5,877      101,139 SH          SHARED         1        101,139
Merge Healthcare Inc           COM            589981109     497      417,494 SH          SHARED         2        417,494
Merge Healthcare Inc           COM            589981109   1,224    1,028,171 SH          SHARED         1      1,028,171
Merrill Lynch & Co Inc         COM            590188108   1,164       21,679 SH          SHARED         2         21,679
Merrill Lynch & Co Inc         COM            590188108   3,051       56,843 SH          SHARED         1         56,843
Microsoft Corp                 COM            594918104   2,110       59,258 SH          SHARED         2         59,258
Microsoft Corp                 COM            594918104   5,461      153,408 SH          SHARED         1        153,408
Mrv Communications Inc         COM            553477100   2,732    1,178,210 SH          SHARED         2      1,178,210
Mrv Communications Inc         COM            553477100   6,717    2,896,634 SH          SHARED         1      2,896,634
MRV Communications Inc         COM            553477100  11,847    5,106,503 SH          SHARED         1      5,106,503
Nationwide Health Pptys Inc    COM            638620104     397       12,653 SH          SHARED         2         12,653
Nationwide Health Pptys Inc    COM            638620104   2,886       91,995 SH          SHARED         1         91,995
OPNEXT                         COM            68375V105  11,505    1,300,000 SH          SHARED         1      1,300,000
OPNEXT INC                     COM            68375V105   1,521      171,920 SH          SHARED         2        171,920
OPNEXT INC                     COM            68375V105   3,921      443,063 SH          SHARED         1        443,063
Penn Real Estate Investment Tr SH BEN INT     709102107     620       20,885 SH          SHARED         2         20,885
Penn Real Estate Investment Tr SH BEN INT     709102107   4,535      152,806 SH          SHARED         1        152,806
Pepsico Inc                    COM            713448108   1,767       23,285 SH          SHARED         2         23,285



Pepsico Inc                    COM            713448108   4,558       60,054 SH          SHARED         1         60,054
Pfizer Inc                     COM            717081103   1,812       79,726 SH          SHARED         2         79,726
Pfizer Inc                     COM            717081103   4,689      206,277 SH          SHARED         1        206,277
Plum Creek Timber Co Common    COM            729251108     801       17,393 SH          SHARED         2         17,393
Plum Creek Timber Co Common    COM            729251108   5,799      125,954 SH          SHARED         1        125,954
Powershares QQQ Nasdaq 100     COM            73935A104  20,293      396,500 SH          SHARED         1        396,500
Procter & Gamble Co            COM            742718109   2,579       35,127 SH          SHARED         2         35,127
Procter & Gamble Co            COM            742718109   6,664       90,770 SH          SHARED         1         90,770
Prologis                       SH BEN INT     743410102     814       12,849 SH          SHARED         2         12,849
Prologis                       SH BEN INT     743410102   5,860       92,464 SH          SHARED         1         92,464
Public Storage                 COM            74460D109     411        5,601 SH          SHARED         2          5,601
Public Storage                 COM            74460D109   2,973       40,492 SH          SHARED         1         40,492
Rackable Systems Inc           COM            750077109   3,379      337,932 SH          SHARED         2        337,932
Rackable Systems Inc           COM            750077109   8,711      871,123 SH          SHARED         1        871,123
Rackable Systems Inc           COM            750077109   9,405      940,500 SH          SHARED         1        940,500
Regency Centers Corp           COM            758849103     434        6,737 SH          SHARED         2          6,737
Regency Centers Corp           COM            758849103   3,118       48,344 SH          SHARED         1         48,344
Schering-Plough Corp           COM            806605101   1,477       55,428 SH          SHARED         2         55,428
Schering-Plough Corp           COM            806605101   3,803      142,774 SH          SHARED         1        142,774
Simon Property Group Inc       COM            828806109   1,001       11,528 SH          SHARED         2         11,528
Simon Property Group Inc       COM            828806109   7,263       83,616 SH          SHARED         1         83,616
SL Green Realty Corp           COM            78440X101     609        6,517 SH          SHARED         2          6,517
SL Green Realty Corp           COM            78440X101   4,413       47,220 SH          SHARED         1         47,220
SPDR Trust                     COM            78462F103 738,071    5,041,816 SH          SHARED         1      5,041,816
Sprint Nextel Corp             COM            852061100   1,072       81,650 SH          SHARED         2         81,650
Sprint Nextel Corp             COM            852061100   2,765      210,615 SH          SHARED         1        210,615
Telabs Inc                     COM            879664100   2,521      385,489 SH          SHARED         2        385,489
Telabs Inc                     COM            879664100   6,497      993,462 SH          SHARED         1        993,462
Tenet Healthcare Corp          COM            88033G100   2,626      516,998 SH          SHARED         2        516,998
Tenet Healthcare Corp          COM            88033G100   9,198    1,810,584 SH          SHARED         1      1,810,584
Time Warner Inc                COM            887317105   1,493       90,411 SH          SHARED         2         90,411
Time Warner Inc                COM            887317105   3,842      232,682 SH          SHARED         1        232,682
United Technologies Corp       COM            913017109   1,815       23,713 SH          SHARED         2         23,713
United Technologies Corp       COM            913017109   4,684       61,194 SH          SHARED         1         61,194
Unitedhealth Group Inc         COM            91324P102   1,831       31,467 SH          SHARED         2         31,467
Unitedhealth Group Inc         COM            91324P102   4,724       81,167 SH          SHARED         1         81,167
Ventas Inc                     COM            92276F100   1,037       22,920 SH          SHARED         2         22,920
Ventas Inc                     COM            92276F100   7,523      166,248 SH          SHARED         1        166,248
Verizon Communications Inc     COM            92343V104   1,553       35,537 SH          SHARED         2         35,537
Verizon Communications Inc     COM            92343V104   4,005       91,661 SH          SHARED         1         91,661
Viacom Inc-class B             CL B           92553P201   1,685       38,358 SH          SHARED         2         38,358



Viacom Inc-class B             CL B           92553P201   4,353       99,121 SH          SHARED         1         99,121
Vicor Corp                     COM            925815102   3,675      235,755 SH          SHARED         1        235,755
Vornado Realty Trust           SH BEN INT     929042109     623        7,080 SH          SHARED         2          7,080
Vornado Realty Trust           SH BEN INT     929042109   4,520       51,392 SH          SHARED         1         51,392
Wachovia Corp                  COM            929903102   2,632       69,205 SH          SHARED         2         69,205
Wachovia Corp                  COM            929903102   6,767      177,931 SH          SHARED         1        177,931
Wal-Mart Stores Inc            COM            931142103   1,380       29,035 SH          SHARED         2         29,035
Wal-Mart Stores Inc            COM            931142103   3,568       75,073 SH          SHARED         1         75,073
Walt Disney Co                 COM            254687106   1,468       45,482 SH          SHARED         2         45,482
Walt Disney Co                 COM            254687106   3,794      117,528 SH          SHARED         1        117,528
Wellpoint Inc                  COM            94973V107   1,623       18,495 SH          SHARED         2         18,495
Wellpoint Inc                  COM            94973V107   4,192       47,786 SH          SHARED         1         47,786
Wells Fargo & Co               COM            949746101   2,592       85,851 SH          SHARED         2         85,851
Wells Fargo & Co               COM            949746101   6,726      222,784 SH          SHARED         1        222,784
Wyeth                          COM            983024100   1,403       31,741 SH          SHARED         2         31,741
Wyeth                          COM            983024100   3,625       82,033 SH          SHARED         1         82,033