UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   FORM 13F

                              FORM 13F COVER PAGE


Report for the Calendar Year or Quarter Ended: March 31, 2013
                                               -----------------------

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:    John Vaz
         -------------------------------
Title:   Compliance Analyst
         -------------------------------
Phone:   781-446-2420
         -------------------------------

Signature, Place, and Date of Signing:

   /s/ John Vaz                       Wellesley Hills, MA  May 10, 2013
   -------------------------------    -------------------  -------------
           [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

    28-06597                    McLean Budden
       ---------------          ------------------------------------
    28-04968                    MFS
       ---------------          ------------------------------------

    [Repeat as necessary.]




                             FORM 13F SUMMARY PAGE

Report Summary:


Number of Other Included Managers:      2
                                        --------------------

Form 13F Information Table Entry Total: 198
                                        --------------------

Form 13F Information Table Value Total: US$1,320,862
                                        --------------------
                                            (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.

    No.       Form 13F File Number         Name

    1         28-12046                     Sun Capital Advisers LLC.
    ------       -----------------         ------------------------------------
    2         28-12047                     Sun Life Assurance Company of Canada
    ------       -----------------         ------------------------------------




        COLUMN 1               COLUMN 2        COLUMN 3   COLUMN 4       COLUMN 5        COLUMN 6   COLUMN 7         OLUMN 8
------------------------- ------------------- --------- ----------- ------------------- ---------- ---------- ---------------------
                                                           VALUE     SHRS OR   SH/ PUT/ INVESTMENT   OTHER       VOTING AUTHORITY
     NAME OF ISSUER         TITLE OF CLASS      CUSIP    (x$1000)    PRN AMT   PRN CALL DISCRETION  MANAGERS    SOLE   SHARED NONE
------------------------- ------------------- --------- ----------- ---------- --- ---- ---------- ---------- -------- ------ -----
                                                                                             
3M CO                     COM                 88579Y101     6,651       62,560 SH       SOLE       1             62560
3M CO                     COM                 88579Y101     1,593       14,981 SH       SOLE       2             14981
Abbott Laboratories       COM                 002824100       883       25,000 SH       SOLE       1             25000
Abbvie Inc                COM                 00287Y109     1,020       25,000 SH       SOLE       1             25000
Acme Packet Inc           COM                 004764106    13,707      469,098 SH       SOLE       1            469098
Aeropostale Inc           COM                 007865108    10,833      796,571 SH       SOLE       1            796571
Aeropostale Inc           COM                 007865108     1,940      142,656 SH       SOLE       2            142656
AES Corporation           COM                 00130H105     3,743      297,733 SH       SOLE       1            297733
AES Corporation           COM                 00130H105     1,252       99,571 SH       SOLE       2             99571
American International
 Group                    COM NEW             026874784     7,511      193,475 SH       SOLE       1            193475
Amgen Inc                 COM                 031162100     6,648       64,851 SH       SOLE       1             64851
Amgen Inc                 COM                 031162100     2,391       23,320 SH       SOLE       2             23320
Apple Inc                 COM                 037833100     1,063        2,401 SH       SOLE       2              2401
Archer Daniels Midland    COM                 039483102     5,320      157,715 SH       SOLE       1            157715
AT&T Inc                  COM                 00206R102     7,231      197,094 SH       SOLE       1            197094
AT&T Inc                  COM                 00206R102     2,391       65,170 SH       SOLE       2             65170
Bank of America Corp      COM                 060505104     2,239      183,820 SH       SOLE       2            183820
Barclays Bank Plc         CALL                06738C828    14,437   14,905,000 SH       SOLE       1          14905000
Barclays Bank Plc         CALL                06738C828    18,345   18,940,000 SH       SOLE       1          18940000
Baxter International Inc  COM                 071813109     5,057       69,624 SH       SOLE       1             69624
Baxter International Inc  COM                 071813109     1,924       26,484 SH       SOLE       2             26484
BB&T Corporation          COM                 054937107     3,748      119,407 SH       SOLE       1            119407
Berkshire Hathaway Inc    CL B NEW            084670702     5,083       48,779 SH       SOLE       1             48779
Berkshire Hathaway Inc    CL B NEW            084670702     1,779       17,070 SH       SOLE       2             17070
Boeing Company            COM                 097023105     6,119       71,274 SH       SOLE       1             71274
Boeing Company            COM                 097023105     1,419       16,534 SH       SOLE       2             16534
Boston Scientific Corp    COM                 101137107    11,526    1,475,791 SH       SOLE       1           1475791
Boston Scientific Corp    COM                 101137107     4,110      526,296 SH       SOLE       2            526296
BOSTON SCIENTIFIC
 CORPORATION              COM                 101137107     7,420      950,000 SH       SOLE       1            950000
Bristol-Myers Squibb      COM                 110122108     7,560      183,544 SH       SOLE       1            183544
Bristol-Myers Squibb      COM                 110122108     1,930       46,855 SH       SOLE       2             46855
Bunge Limited             COM                 G16962105     4,652       63,010 SH       SOLE       1             63010
Bunge Limited             COM                 G16962105     1,643       22,260 SH       SOLE       2             22260
Caterpillar Inc           COM                 149123101     1,566       18,009 SH       SOLE       1             18009
CCG Commercial Pool II
 Inc                      PFD                 12501RAF6       330        1,000 SH       SOLE       1              1000
Centurylink Inc           COM                 156700106     3,290       93,652 SH       SOLE       1             93652
Centurylink Inc           COM                 156700106     1,318       37,531 SH       SOLE       2             37531
Charles Schwab Corp       COM                 808513105     4,535      256,345 SH       SOLE       1            256345
Charles Schwab Corp       COM                 808513105     1,141       64,491 SH       SOLE       2             64491
Chevron Corp              COM                 166764100    11,840       99,649 SH       SOLE       1             99649
Chevron Corp              COM                 166764100     3,640       30,632 SH       SOLE       2             30632
Cisco Systems Inc         COM                 17275R102     1,965       93,996 SH       SOLE       1             93996
Citigroup Inc             COM NEW             172967424     1,434       32,408 SH       SOLE       2             32408
Clean Energy Fuels Corp   COM                 184499101     4,148      319,063 SH       SOLE       1            319063
Clean Energy Fuels Corp   COM                 184499101     1,398      107,504 SH       SOLE       2            107504
Coca-Cola Co              COM                 191216100     6,738      166,606 SH       SOLE       1            166606
Coca-Cola Co              COM                 191216100     1,694       41,880 SH       SOLE       2             41880
Commvault Systems Inc     COM                 204166102     6,081       74,182 SH       SOLE       1             74182
ConocoPhillips            COM                 20825C104     5,225       86,931 SH       SOLE       1             86931
ConocoPhillips            COM                 20825C104     1,213       20,176 SH       SOLE       2             20176
Consolidated Edison Inc   COM                 209115104     1,515       24,817 SH       SOLE       1             24817
Cosi Inc                  COM                 22122P101       688      996,776 SH       SOLE       1            996776
Cosi Inc                  COM                 22122P101       256      371,709 SH       SOLE       2            371709
CVS Caremark Corporation  COM                 126650100     5,046       91,758 SH       SOLE       1             91758
CVS Caremark Corporation  COM                 126650100     1,778       32,334 SH       SOLE       2             32334
Deckers Outdoor Corp      COM                 243537107     8,625      154,867 SH       SOLE       1            154867
Deckers Outdoor Corp      COM                 243537107     6,660      119,593 SH       SOLE       2            119593
Denbury Res Inc           COM                 247916208     4,773      255,932 SH       SOLE       1            255932
Denbury Res Inc           COM                 247916208     1,622       86,993 SH       SOLE       2             86993
DR Horton Inc             COM                 23331A109     6,153      253,191 SH       SOLE       1            253191
Duke Energy Corp          COM NEW             26441C204     1,611       22,192 SH       SOLE       1             22192
EI Dupont de Nemour and
 Co                       COM                 263534109     1,578       32,108 SH       SOLE       1             32108
Eli Lilly & Co            COM                 532457108     5,629       99,118 SH       SOLE       1             99118
Eli Lilly & Co            COM                 532457108     1,920       33,815 SH       SOLE       2             33815
Emerson Electric Co       COM                 291011104     4,480       80,185 SH       SOLE       1             80185
Emerson Electric Co       COM                 291011104     1,555       27,841 SH       SOLE       2             27841
EOG Resources             COM                 26875P101     4,806       37,526 SH       SOLE       1             37526
EOG Resources             COM                 26875P101     1,695       13,234 SH       SOLE       2             13234
Express Inc               COM                 30219E103    12,781      717,630 SH       SOLE       1            717630
Express Inc               COM                 30219E103     2,260      126,877 SH       SOLE       2            126877
Exxon Mobil Corp          COM                 30231G102    13,954      154,860 SH       SOLE       1            154860
Exxon Mobil Corp          COM                 30231G102     3,543       39,315 SH       SOLE       2             39315
Fifth Third Bancorp       COM                 316773100     4,617      283,075 SH       SOLE       1            283075
Forest Laboratories Inc   COM                 345838106     7,890      207,410 SH       SOLE       1            207410
Forest Laboratories Inc   COM                 345838106     2,778       73,031 SH       SOLE       2             73031
Fusion-io Inc             COM                 36112J107    11,240      686,605 SH       SOLE       1            686605
Fusion-io Inc             COM                 36112J107     3,800      232,122 SH       SOLE       2            232122
General Electric Company  COM                 369604103     9,542      412,718 SH       SOLE       1            412718
General Electric Company  COM                 369604103     2,902      125,522 SH       SOLE       2            125522
Goldman Sachs Group Inc   COM                 38141G104     5,825       39,584 SH       SOLE       1             39584
Goldman Sachs Group Inc   COM                 38141G104     1,510       10,265 SH       SOLE       2             10265
Goodyear Tire & Rubber
 Co                       COM                 382550101     4,271      338,704 SH       SOLE       1            338704
Goodyear Tire & Rubber
 Co                       COM                 382550101     1,490      118,150 SH       SOLE       2            118150
Google Inc                CL A                38259P508    10,526       13,256 SH       SOLE       1             13256
Google Inc                CL A                38259P508     2,627        3,309 SH       SOLE       2              3309
Halozyme Therapeutics
 Inc                      COM                 40637H109     4,412      764,566 SH       SOLE       1            764566
Halozyme Therapeutics
 Inc                      COM                 40637H109     1,080      187,142 SH       SOLE       2            187142
Hess Corporation          COM                 42809H107     4,431       61,876 SH       SOLE       1             61876
Hess Corporation          COM                 42809H107     1,418       19,796 SH       SOLE       2             19796
Home Depot Inc            COM                 437076102     2,163       31,000 SH       SOLE       1             31000
Honeywell International
 Inc                      COM                 438516106     8,434      111,930 SH       SOLE       1            111930
Honeywell International
 Inc                      COM                 438516106     1,894       25,136 SH       SOLE       2             25136
IBM Corp                  COM                 459200101     1,700        7,969 SH       SOLE       1              7969
Intel Corp                COM                 458140100     1,309       59,918 SH       SOLE       1             59918
INTERMEC INC              COM                 458786100     3,195      325,000 SH       SOLE       1            325000
International Paper Co    COM                 460146103    15,291      328,271 SH       SOLE       1            328271
International Paper Co    COM                 460146103     3,333       71,552 SH       SOLE       2             71552
IShares                   MSCI UTD KINGD      464286699     3,359      183,870 SH       SOLE       1            183870
IShares                   MSCI EAFE Index     464287465    25,293      428,838 SH       SOLE       2            428838
ISHARES MSCI EAFE INDEX
 FUND                     MSCI EAFE Index     464287465     7,160      121,400 SH       SOLE       1            121400
ISHARES MSCI FRANCE
 INDEX FUND               MSCI France Index   464286707     3,520      151,650 SH       SOLE       1            151650
ISHARES MSCI GERMANY
 INDEX                    MSCI Germany Index  464286806       673       27,500 SH       SOLE       1             27500
ISHARES MSCI JAPAN FUND   MSCI Japan Index    464286848     7,765      718,956 SH       SOLE       1            718956
ISHARES MSCI MEXICO
 INVESTABLE MARKET INDEX
 FUND                     MSCI Mexico         464286822     1,509       20,225 SH       SOLE       1             20225
ISHARES MSCI UNITED
 KINGDOM INDEX FUND       MSCI United Kingdom 464286699     2,706      148,100 SH       SOLE       1            148100
Johnson & Johnson         COM                 478160104     3,691       45,275 SH       SOLE       1             45275
JP Morgan Chase & Co      COM                 46625H100     2,831       59,643 SH       SOLE       2             59643
Kayne Anderson ETR Fund
 Inc                      PFD                 48660P2#0    17,040      600,000 SH       SOLE       1            600000
Kayne Anderson Midstream
 Enrgy                    PFD                 48661E2*8    17,340      600,000 SH       SOLE       1            600000
Kayne Anderson MLP
 Investment               PFD                 4866062#2    17,100      600,000 SH       SOLE       1            600000
Kayne Anderson MLP
 Investment               PFD                 4866064#0    13,068      440,000 SH       SOLE       1            440000
Kimberly-Clark Corp       COM                 494368103     6,566       67,017 SH       SOLE       1             67017
Kimberly-Clark Corp       COM                 494368103     1,564       15,966 SH       SOLE       2             15966
Kohls Corp                COM                 500255104     1,384       29,994 SH       SOLE       2             29994
Kraft Foods Group Inc     COM                 50076Q106       691       13,418 SH       SOLE       1             13418
Lear Corporation          CALL                521865113         0        1,957 SH       SOLE       1              1957
Lear Corporation          COM NEW             521865204       961       17,522 SH       SOLE       1             17522
Legg Mason Inc            COM                 524901105     4,775      148,519 SH       SOLE       1            148519
Legg Mason Inc            COM                 524901105     1,687       52,460 SH       SOLE       2             52460
Lloyds Banking Group Plc  COM                 539439AC3     1,314    1,460,000 SH       SOLE       1           1460000
Lockheed Martin Corp      COM                 539830109     3,803       39,401 SH       SOLE       1             39401
Lockheed Martin Corp      COM                 539830109     1,347       13,959 SH       SOLE       2             13959
McDonald's Corp           COM                 580135101     3,250       32,602 SH       SOLE       1             32602
Merck & Co Inc            COM                 58933Y105     6,480      146,515 SH       SOLE       1            146515
Merck & Co Inc            COM                 58933Y105     1,622       36,675 SH       SOLE       2             36675
Merge Healthcare Inc      COM                 589499102     2,861      989,930 SH       SOLE       1            989930
Merge Healthcare Inc      COM                 589499102       730      252,733 SH       SOLE       2            252733
Metlife Inc               COM                 59156R108     3,741       98,384 SH       SOLE       1             98384
Microsoft Corp            COM                 594918104     1,511       52,807 SH       SOLE       1             52807
Mondelez International
 Inc                      CL A                609207105     1,232       40,255 SH       SOLE       1             40255
Morgan Stanley            COM NEW             617446448     3,203      145,739 SH       SOLE       1            145739
Morgan Stanley            COM NEW             617446448     1,061       48,290 SH       SOLE       2             48290
Mosaic Holdings Inc       COM                 61945C103     8,237      138,175 SH       SOLE       1            138175
Mosaic Holdings Inc       COM                 61945C103     2,025       33,969 SH       SOLE       2             33969
MRV Communications Inc    COM                 553477407       158       15,182 SH       SOLE       2             15182
MRV Communications Inc    COM                 553477407     2,601      250,137 SH       SOLE       1            250137
Neuberger Berman Real
 Estate                   PFD                 64190A2#9    27,106        1,000 SH       SOLE       1              1000
Occidental Petroleum
 Corp                     COM                 674599105     3,517       44,872 SH       SOLE       1             44872
Occidental Petroleum
 Corp                     COM                 674599105     1,240       15,824 SH       SOLE       2             15824
Palo Alto Networks Inc    COM                 697435105    13,887      245,347 SH       SOLE       1            245347
Palo Alto Networks Inc    COM                 697435105     5,241       92,597 SH       SOLE       2             92597
Pep-Boys Manny Moe &
 Jack                     COM                 713278109     4,925      417,710 SH       SOLE       1            417710
Pep-Boys Manny Moe &
 Jack                     COM                 713278109     1,733      146,987 SH       SOLE       2            146987
Pepsico Inc               COM                 713448108     6,533       82,585 SH       SOLE       1             82585
Pepsico Inc               COM                 713448108     1,607       20,310 SH       SOLE       2             20310
Pfizer Inc                COM                 717081103     9,246      320,365 SH       SOLE       1            320365
Pfizer Inc                COM                 717081103     1,344       46,581 SH       SOLE       2             46581
Philip Morris
 International            COM                 718172109     4,584       49,441 SH       SOLE       1             49441
Philip Morris
 International            COM                 718172109     1,615       17,422 SH       SOLE       2             17422
PNC Financial Services
 Group                    COM                 693475105     5,563       83,657 SH       SOLE       1             83657
POWERSHARES QQQ           UNIT SER 1          73935A104    29,105      422,000 SH       SOLE       1            422000
Procter & Gamble Co       COM                 742718109    10,546      136,857 SH       SOLE       1            136857
Procter & Gamble Co       COM                 742718109     2,361       30,641 SH       SOLE       2             30641
Prudential Financial Inc  COM                 744320102     3,678       62,354 SH       SOLE       1             62354
Raytheon Company          COM NEW             755111507     3,863       65,705 SH       SOLE       1             65705
Raytheon Company          COM NEW             755111507     1,369       23,278 SH       SOLE       2             23278
Resolute Forest Products  COM                   B87SJM7        46        2,841 SH       SOLE       1              2841
Riverbed Technology Inc   COM                 768573107     6,643      445,526 SH       SOLE       1            445526
Riverbed Technology Inc   COM                 768573107     2,380      159,641 SH       SOLE       2            159641
Silicon Graphics
 International            COM                 82706L108    11,978      871,123 SH       SOLE       1            871123
Silicon Graphics
 International            COM                 82706L108     4,366      317,493 SH       SOLE       2            317493
SILICON GRAPHICS
 INTERNATIONAL CORP       COM                 82706L108    12,932      940,500 SH       SOLE       1            940500
Sourcefire Inc            COM                 83616T108    12,287      207,439 SH       SOLE       1            207439
SPDR S&P 500 ETF TRUST    TR UNIT             78462F103   300,521    1,949,149 SH       SOLE       1           1949149
Splunk Inc                COM                 848637104     5,334      133,246 SH       SOLE       1            133246
Splunk Inc                COM                 848637104     1,827       45,636 SH       SOLE       2             45636
State Street Corp         COM                 857477103     5,288       89,490 SH       SOLE       1             89490
State Street Corp         COM                 857477103     1,602       27,104 SH       SOLE       2             27104
Talisman Energy Inc       COM                 87425E103     4,020      328,200 SH       SOLE       1            328200
Talisman Energy Inc       COM                 87425E103     1,393      113,700 SH       SOLE       2            113700
Target Corporation        COM                 87612E106     4,706       68,750 SH       SOLE       1             68750
Target Corporation        COM                 87612E106     1,588       23,194 SH       SOLE       2             23194
Travelers Cos Inc         COM                 89417E109     7,316       86,900 SH       SOLE       1             86900
Travelers Cos Inc         COM                 89417E109     2,092       24,845 SH       SOLE       2             24845
United Technologies Corp  COM                 913017109     7,700       82,415 SH       SOLE       1             82415
United Technologies Corp  COM                 913017109     1,587       16,988 SH       SOLE       2             16988
US Bancorp                COM NEW             902973304     7,026      207,074 SH       SOLE       1            207074
US Bancorp                COM NEW             902973304     1,673       49,307 SH       SOLE       2             49307
Valero Energy Corp        COM                 91913Y100     6,649      146,163 SH       SOLE       1            146163
Vanguard REIT ETF         COM                 922908553    73,817    1,046,600 SH       SOLE       1           1046600
Vanguard REIT ETF         COM                 922908553    11,829      167,710 SH       SOLE       2            167710
Vasco Data Security Intl
 Inc                      COM                 92230Y104     4,624      547,840 SH       SOLE       1            547840
Vasco Data Security Intl
 Inc                      COM                 92230Y104     1,799      213,102 SH       SOLE       2            213102
Verizon Communications
 Inc                      COM                 92343V104     7,976      162,281 SH       SOLE       1            162281
Verizon Communications
 Inc                      COM                 92343V104     1,720       35,000 SH       SOLE       2             35000
Vicor Corp                COM                 925815102       857      172,405 SH       SOLE       2            172405
VICOR CORPORATION         COM                 925815102     2,719      547,164 SH       SOLE       1            547164
VM Ware Inc               COM                 928563402     7,446       94,397 SH       SOLE       1             94397
VM Ware Inc               COM                 928563402     1,299       16,469 SH       SOLE       2             16469
Wachovia Capital Trust
 III                      CALL                92978AAA0    16,056   16,000,000 SH       SOLE       1          16000000
Wachovia Capital Trust
 III                      CALL                92978AAA0     1,004    1,000,000 SH       SOLE       1           1000000
Wal-Mart Stores Inc       COM                 931142103     1,712       22,876 SH       SOLE       1             22876
Walt Disney Co            COM                 254687106     3,139       55,272 SH       SOLE       1             55272
Walt Disney Co            COM                 254687106     1,059       18,648 SH       SOLE       2             18648
Wells Fargo & Co          COM                 949746101     3,575       96,635 SH       SOLE       2             96635
Wet Seal Inc              CL A                961840105     1,973      653,453 SH       SOLE       1            653453
Wet Seal Inc              CL A                961840105       673      222,943 SH       SOLE       2            222943
XL Group Plc              CALL                98372PAJ7       385      394,000 SH       SOLE       1            394000

                                                        1,320,862