UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 29549
FORM 13F
FORM 13F COVER PAGE
Report for the Calendar Year or Quarter Ended: December 31, 1999
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: Massachusetts Mutual Life Insurance Company
Address: 1295 State Street
Springfield, Massachusetts 01111-0001
13F File Number: 28-548
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: David E. Fusco
Title: Compliance Director
Phone: 413-744-7410
Signature, Place, and Date of Signing:
/s/ David E. Fusco
Springfield, Massachusetts
February 10, 2000
Report Type (Check only one.):
[x] 13F HOLDINGS REPORT
[ ] 13F NOTICE
[ ] 13F COMBINATION REPORT
List of Other Managers Reporting for this Manager: NONE
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FORM 13F
SUMMARY PAGE Report Summary:
Number of Other Included Managers: None (See note below)
Form 13F Information Table Entry Total: 110
Form 13F Information Table Value Total: $342,537,000
List of Other Included Managers:
Please note that in the past Form 13F's were filed by Massachusetts
Mutual Life Insurance Company ("MassMutual") on behalf of David L. Babson
and Company Inc. ("Babson") and OppenheimerFunds Inc. ("Oppenheimer").
Babson and Oppenheimer are indirect, majority-owned subsidiaries
of MassMutual. For this filing, and future filings, Babson and
Oppenheimer will file Form 13F's on their own behalf.
Babson and Oppenheimer have indicated that they exercise "sole"
investment discretion with respect to the securities positions
reported in their respective Form 13F's. Nevertheless, such
positions shall also be deemed reported on behalf of MassMutual
to the extent that MassMutual may be deemed to "share" investment
discretion over the positions as a result of its ownership interests
in Babson and Oppenheimer.
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FORM 13F INFORMATION TABLE
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Name of Issuer Title CUSIP Value Shrs or SH/ Put/ INVSTMT Other Voting Authority
Of Class (x$100) Prn amt PRN Call DSCRETN Mgrs Sole Shared None
________________________________________________________________________________________________________
<S> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C>
Advanced Energy SUB NT CV 007973AA8 7,724 6,500,000 PRN Sole X
Agency.Com Inc COM 008447104 383 7,500 SH Sole 7,500
Agilent Technolog COM 00846U101 1,971 25,500 SH Sole 25,500
Akamai Technologies COM 00971T101 1,638 5,000 SH Sole 5,000
American Cntry Hldg COM 025278102 419 515,590 SH Sole 515,590
American Cntry Hldg WT 025278110 57 183,117 SH Sole 183,117
AMF Bowling Inc DB CV 144 03113VAA7 1,357 27,840,000 PRN Sole X
Associated Material COM 045709102 3,521 215,000 SH Sole 215,000
Autonation COM 05329W102 1,110 120,000 SH Sole 120,000
Barclays Bank PLC SPN ADR 06738C505 20,400 800,000 SH Sole 800,000
Budget Group COM CL A 119003101 4,321 476,726 SH Sole 476,726
Cacheflow Inc COM 126946102 653 5,000 SH Sole 5,000
Caliper Technolog COM 130876105 67 1,000 SH Sole 1,000
Canadian Nat Rail PFD CV 136375409 3,150 75,000 SH Sole 75,000
Chaparral Resources COM 159420306 7 976 SH Sole 976
Chartered SemiCond ADR 16133R106 146 2,000 SH Sole 2,000
Cobalt Networks COM 19074R101 135 1,250 SH Sole 1,250
Computer Horizons COM 205908106 1,079 66,668 SH Sole 66,668
Continental Airline COM CL B 210795308 4,125 92,955 SH Sole 92,955
Correctional Serv COM 219921103 235 53,672 SH Sole 53,672
Cymer Inc. SB NT CV 232572AC1 9,237 8,150,000 PRN Sole X
D & K Healthcare COM 232861104 6,836 491,979 SH Sole 491,979
Data Return Corp COM 23785M104 535 10,000 SH Sole 10,000
DeltaThree.Com COM CL A 24783N102 180 7,000 SH Sole 7,000
Diamond Off Drillng SB NT CV 25271CAA0 21,850 20,650,000 PRN Sole X
Digimarc Corp COM 253807101 50 1,000 SH Sole 1,000
Digital Impact Inc COM 25385G106 63 1,250 SH Sole 1,250
Dura Pharmaceutical SB NT CV 26632SAA7 2,705 3,350,000 PRN Sole X
EBenx Inc COM 278668108 45 1,000 SH Sole 1,000
El Sitio Inc COM G30177102 92 2,500 SH Sole 2,500
Emcor Group SB NT CV 29084QAC4 4,010 4,550,000 PRN Sole X
Emmis Communication PFD CV 291525202 6,356 75,000 SH Sole 75,000
Energy Conv Devices WT 292659224 261 139,000 SH Sole 139,000
EPCOS AG ARD 29410P107 1,493 20,000 SH Sole 20,000
ESpeed Inc COM CL A 296643109 36 1,000 SH Sole 1,000
E-Stamp Corp COM 269154100 334 15,000 SH Sole 15,000
Expedia Inc COM CL A 302125109 140 4,000 SH Sole 4,000
Family Golf Centers SB NT CV 30701AACO 2,649 12,660,000 PRN Sole X
Finisar Corp COM 31787A101 225 2,500 SH Sole 2,500
Freemarkets Inc COM 356602102 853 2,500 SH Sole 2,500
General Chemical COM 369332101 694 300,000 SH Sole 300,000
Gentek Inc COM 37245X104 3,131 300,000 SH Sole 300,000
GetThere.Com COM 374266104 201 5,000 SH Sole 5,000
Healthplan Services COM 421959107 467 133,376 SH Sole 133,376
Healthsouth Corp SB DB CV 421924AD3 11,362 14,750,000 PRN Sole X
Healthsouth Corp SB DB CV 421924AF8 1,155 1,500,000 PRN Sole X
Hilton Hotels Corp SB NT CV 432848AL3 9,287 12,190,000 PRN Sole X
I2 Technologies SUB NT CV 465754AD1 8,609 6,000,000 PRN Sole X
ITC\Deltacom COM 45031T104 193 6,979 SH Sole 6,979
IManage Inc COM 45245Y105 32 1,000 SH Sole 1,000
Immersion Corp COM 452521107 96 2,500 SH Sole 2,500
Interim Services SB NT CV 45868PAA8 8,704 9,800,000 PRN Sole X
InterTrust Tech COM 46113Q109 294 2,500 SH Sole 2,500
JNI Corp COM 46622G105 330 5,000 SH Sole 5,000
Jupiter Communicat COM 482050101 227 7,500 SH Sole 7,500
Kellstrom Inds SB NT CV 488035AE6 12,699 19,250,000 PRN Sole X
Key Energy Serv SB NT CV 492914AF3 2,138 3,065,000 PRN Sole X
Korea Thrunet ADS COM Y49975108 204 3,000 SH Sole 3,000
Lewis Dreyfus Nat COM 546011107 7.904 484,552 SH Sole 484,552
Lund Intl Holdings COM 550368104 1,600 285,714 SH Sole 285,714
Mascotech Inc SB DB CV 574670AB1 5,578 7,450,000 PRN Sole X
Magna International SB DB CV 559222AG9 18,479 21,735,000 PRN Sole X
MassMutual Part Inv SH BEN IN 576299101 158 15,425 SH Sole 15,425
McAfee.Com Corp COM CL A 579062100 113 2,500 SH Sole 2,500
Medicalogic Inc COM 584642102 105 5,000 SH Sole 5,000
Mercury Computer COM 589378108 4,161 125,132 SH Sole 125,132
Metasolv Software COM 591393103 409 5,000 SH Sole 5,000
Midway Airlines COM 598126100 226 36,663 SH Sole 36,663
Mindspring Enterp SB NT CV 602683AA2 10,786 11,265,000 PRN Sole X
Multex.Com Inc COM 625367107 8,403 223,350 SH Sole 223,350
NetRatings Inc COM 64116M108 48 1,000 SH Sole 1,000
Networks Assoc SB DB CV 640938AB2 13,121 34,500,000 PRN Sole X
Next Level Comm COM 65333U104 243 3,250 SH Sole 3,250
Oak Industries SB NT CV 671400AJ8 4,863 1,750,000 PRN Sole X
Oak Industries SB NT CV 671400AL3 5,363 1,930,000 PRN Sole X
Ocean Energy Inc COM 67481E106 931 126,488 SH Sole 126,488
Official Payments COM 676235104 260 5,000 SH Sole 5,000
Optical Security Gr COM 683848204 3,150 500,000 SH Sole 500,000
Owens-Illinois CONV PRE 690768502 2,668 85,560 SH Sole 85,560
Oxford Health Plans COM 691471106 1,427 112,500 SH Sole 112,500
Pathways Group Inc. COM 70321D106 143 60,229 SH Sole 60,229
PepsiAmericas, Inc COM 71343P101 8,308 2,215,371 SH Sole 2,215,371
Precision Standard COM 740327200 2,666 300,000 SH Sole 300,000
Preview Systems COM 741379101 65 1,000 SH Sole 1,000
PSINET PFD CV 74437C309 5,200 89,475 SH Sole 89,475
Quintus Corp COM 748798105 459 10,000 SH Sole 10,000
Railtex Inc COM 750766107 2,009 118,331 SH Sole 118,331
Rainmaker Systems COM 750875106 101 5,000 SH Sole 5,000
Rent Way Inc COM 76009U104 11,651 623,500 SH Sole 623,500
Royal Bank Scotland SP ADR 780097309 15,375 600,000 SH Sole 600,000
Santa Fe Snyder COM 80218K105 441 55,140 SH Sole 55,140
Sciquest.Com COM 80908Q107 199 2,500 SH Sole 2,500
Security Capital US SP ADR 814136206 9,318 662,560 SH Sole 662,560
STMicroelectronics SUB LYON 861012AB8 6,841 5,000,000 SH Sole 5,000,000 X
Storage Technology COM 862111200 120 6,522 SH Sole 6,522
Sunglass Hut Intl SB NT CV 86736FAA4 2,654 3,280,000 PRN Sole X
Supreme Industries COM CL A 868607102 1,350 242,468 SH Sole 242,468
Swiss Army Brands COM 870827102 1,282 180,000 SH Sole 180,000
Sycamore Networks COM 871206108 1,078 3,500 SH Sole 3,500
TGC Industries Inc COM 872417308 10 12,721 SH Sole 12,721
TSR Inc COM 872885108 1,270 154,000 SH Sole 154,000
Telecorp PCS Inc COM 879299105 76 2,000 SH Sole 2,000
Terra Networks COM 88100W103 274 5,000 SH Sole 5,000
Tower Automotive SB NT CV 891707AE1 3,073 3,730,000 PRN Sole X
Transmontaigne Inc COM 893934109 6,996 1,175,846 SH Sole 1,175,846
Tridex Corp COM 895906105 232 285,714 SH Sole 285,714
Tritel Inc COM 89675X104 79 2,500 SH Sole 2,500
Triton PCS Holdings COM CL A 89677M106 182 4,000 SH Sole 4,000
VA Linux Systems COM 91819B105 103 500 SH Sole 500
Video Services Corp COM 92656U107 715 159,091 SH Sole 159,091
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