UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
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: Amica Mutual Insurance Company
Address: 100 Amica Way, Lincoln, RI 02865-1156
13F File Number: 28-2565
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: Robert A. DiMuccio
Title: Sr. Vice President and Treasurer
Phone: (401)334-6000
Signature, Place, and Date of Signing:
Robert A. DiMuccio Lincoln, Rhode Island December 31, 1999
Report Type (Check only one.):
[X] 13F HOLDINGS REPORT.
[ ] 13F NOTICE.
[ ] 13F COMBINATION REPORT.
List of Other Managers Reporting for this Manager:
<PAGE>
FORM 13F SUMMARY PAGE
Report Summary:
Number of Other Included Managers: 0
Form 13F Information Table Entry Total: 154
Form 13F Information Table Value Total: 998,579,365
List of Other Included Managers:
No. 13F File Number Name
<PAGE>
<TABLE> <C> <C>
ITEM 8
ITEM 6 VOTING
INVESTMENT DISCRETION AUTHORITY
ITEM 5 ------------------------ (SHARES)
ITEM 2 ITEM 3 ITEM 4 SHARES OR (C) ----------------
ITEM 1 TITLE OF CUSIP FAIR MARKET PRINCIPAL (A) (B) SHARED ITEM 7 (A) (B) (C)
NAME OF ISSUER CLASS NUMBER VALUE AMOUNT SOLE SHARED -OTHER MGR SOLE SHARED NONE
- ------------------------------------------------------------------------------------------------------------------------------------
AIR PRODS & CHE COM 009158-10-6 5705710 170000 170000 170000
ALBERTSONS INC COM 013104-10-4 812700 25200 25200 25200
ALCATEL SPONSORED ADR 013904-30-5 1467000 32600 32600 32600
ALCOA INC COM 013817-10-1 3320000 40000 40000 40000
ALLERGAN SPECIA CL A 018494-10-4 41031 3250 3250 3250
ALLTEL CORP COM 020039-10-3 1733637 20966 20966 20966
AMERICAN ELEC P COM 025537-10-1 1303215 40567 40567 40567
AMERICAN HOME P COM 026609-10-7 9420000 240000 240000 240000
AMERICAN INTL G COM 026874-10-7 18816132 174022 174022 174022
AMR CORP COM 001765-10-6 3664900 54700 54700 54700
APPLIED MATLS I COM 038222-10-5 6434230 50788 50788 50788
ARCHSTONE CMNTY SH BEN INT 039581-10-3 738000 36000 36000 36000
AT&T CORP COM 001957-10-9 15109906 297363 297363 297363
ATLANTIC RICHFI COM 048825-10-3 6228000 72000 72000 72000
AUTODESK INC COM 052769-10-6 148635 4404 4404 4404
AVNET INC COM 053807-10-3 1815000 30000 30000 30000
BANK NEW YORK I COM 064057-10-2 508800 12720 12720 12720
BARD C R INC COM 067383-10-9 2915000 55000 55000 55000
BAXTER INTL INC COM 071813-10-9 2990967 47617 47617 47617
BELL ATLANTIC C COM 077853-10-9 3782431 61440 61440 61440
BELLSOUTH CORP COM 079860-10-2 4072731 87000 87000 87000
BORG-WARNER AUT COM 099724-10-6 1458000 36000 36000 36000
BOSTON PROPERTI COM 101121-10-1 216319 6950 6950 6950
BP AMOCO P L C SPONSORED ADR 055622-10-4 3800303 64072 64072 64072
BRISTOL MYERS S COM 110122-10-8 26933285 419600 419600 419600
BROWN & SHARPE CL A 115223-10-9 128138 60300 60300 60300
BURLINGTON NORT COM 12189T-10-4 2182500 90000 90000 90000
BURLINGTON RES COM 122014-10-3 815003 24650 24650 24650
CABLETRON SYS I COM 126920-10-7 650000 25000 25000 25000
CAMPBELL SOUP C COM 134429-10-9 5068128 131000 131000 131000
CAREMARK RX INC COM 141705-10-3 70512 13927 13927 13927
CATERPILLAR INC COM 149123-10-1 7059450 150000 150000 150000
CENTRAL & SOUTH COM 152357-10-9 1100000 55000 55000 55000
CHEVRON CORPORA COM 166751-10-7 11261250 130000 130000 130000
CHOICEPOINT INC COM 170388-10-2 1986000 48000 48000 48000
COLGATE PALMOLI COM 194162-10-3 23400000 360000 360000 360000
COMPAQ COMPUTER COM 204493-10-0 238154 8800 8800 8800
COMPUTER SCIENC COM 205363-10-4 11355000 120000 120000 120000
CONOCO INC CL B 208251-40-5 2456804 98766 98766 98766
CORNING INC COM 219350-10-5 13667428 106000 106000 106000
COVANCE INC COM 222816-10-0 449821 41600 41600 41600
CROSS A T CO CL A 227478-10-4 180000 40000 40000 40000
CVS CORP COM 126650-10-0 6837566 171475 171475 171475
DARDEN RESTAURA COM 237194-10-5 271875 15000 15000 15000
DAYTON HUDSON C COM 239753-10-6 8614277 117300 117300 117300
DEXTER CORP COM 252165-10-5 4471875 112500 112500 112500
DU PONT E I DE COM 263534-10-9 3090855 46920 46920 46920
EASTMAN KODAK C COM 277461-10-9 6573656 99225 99225 99225
ECOLAB INC COM 278865-10-0 5849188 149500 149500 149500
EL PASO ENERGY COM 283905-10-7 920644 23720 23720 23720
ELECTRONIC DATA COM 285661-10-4 3012210 45000 45000 45000
EMERSON ELEC CO COM 291011-10-4 4590000 80000 80000 80000
EQUIFAX INC COM 294429-10-5 5744188 243780 243780 243780
EQUITY OFFICE P COM 294741-10-3 834788 33900 33900 33900
EXXON MOBIL COR COM 30231G-10-2 43481221 539717 539717 539717
FEDERAL NATL MT COM 313586-10-9 11969365 191700 191700 191700
FIRST INDUSTRIA COM 32054K-10-3 820396 29900 29900 29900
FLEETBOSTON FIN COM 339030-10-8 6525349 187440 187440 187440
FLORIDA PROGRES COM 341109-10-6 2170022 51285 51285 51285
FORD MTR CO DEL COM 345370-10-0 2868239 53800 53800 53800
FPL GROUP INC COM 302571-10-4 2397528 56000 56000 56000
GABLES RESIDENT SH BEN INT 362418-10-5 720000 30000 30000 30000
GENERAL ELEC CO COM 369604-10-3 46867585 302860 302860 302860
GENERAL MLS INC COM 370334-10-4 1072500 30000 30000 30000
GIBRALTAR STL C COM 37476F-10-3 399713 17100 17100 17100
GOODYEAR TIRE & COM 382550-10-1 1549639 55220 55220 55220
GRAINGER W W IN COM 384802-10-4 6502568 136000 136000 136000
GTE CORP COM 362320-10-3 5832738 82660 82660 82660
HALLIBURTON CO COM 406216-10-1 2616250 65000 65000 65000
HANNAFORD BROS COM 410550-10-7 3597345 51900 51900 51900
HASBRO INC COM 418056-10-7 2255516 119100 119100 119100
HEINZ H J CO COM 423074-10-3 3049676 76600 76600 76600
HEWLETT PACKARD COM 428236-10-3 15925000 140000 140000 140000
IDACORP INC COM 451107-10-6 1340650 50000 50000 50000
INGERSOLL-RAND COM 456866-10-2 6194588 112500 112500 112500
INTEL CORP COM 458140-10-0 27037351 328470 328470 328470
INTERNATIONAL B COM 459200-10-1 17639720 163520 163520 163520
JO-ANN STORES I CL A 47758P-10-9 361181 32105 32105 32105
KIMBERLY CLARK COM 494368-10-3 6124997 93600 93600 93600
KLA-TENCORP COR COM 482480-10-0 3102908 27860 27860 27860
LATIN AMERN DIS COM 51828C-10-6 857712 80250 80250 80250
LOCKHEED MARTIN COM 539830-10-9 547531 25030 25030 25030
LUCENT TECHNOLO COM 549463-10-7 18787800 250504 250504 250504
MATTEL INC COM 577081-10-2 975384 74315 74315 74315
MCKESSON HBOC I COM 58155Q-10-3 3112988 138355 138355 138355
MDU RES GROUP I COM 552690-10-9 6367500 318375 318375 318375
MEDIAONE GROUP COM 58440J-10-4 3456585 45000 45000 45000
MELLON FINL COR COM 58551A-10-8 9757346 286450 286450 286450
MERCK & CO INC COM 589331-10-7 24187680 360000 360000 360000
MINNESOTA MNG & COM 604059-10-5 7242750 74000 74000 74000
MORGAN J P & CO COM 616880-10-0 13053518 103088 103088 103088
MORGAN STANLEY COM NEW 617446-44-8 18843000 132000 132000 132000
MORGAN STAN D W COM 61744U-10-6 9821541 831418 831418 831418
MORGAN STANLEY COM 61744G-10-7 3275308 200779 200779 200779
MORRISON MGMT S COM 618459-10-1 1355235 62850 62850 62850
MOTOROLA INC COM 620076-10-9 12869650 87400 87400 87400
NABISCO HLDGS C CL A 629526-10-4 1285200 40800 40800 40800
NCR CORP NEW COM 62886E-10-8 457416 12077 12077 12077
NEW CENTURY ENE COM 64352U-10-3 1063125 35000 35000 35000
NEW YORK TIMES CL A 650111-10-7 5403750 110000 110000 110000
NEWBRIDGE NETWO COM 650901-10-1 1805040 80000 80000 80000
NEWMONT MINING COM 651639-10-6 688009 28082 28082 28082
NEWPORT NEWS SH COM 652228-10-7 1139875 41450 41450 41450
NORTEL NETWORKS COM 656569-10-0 7027580 69580 69580 69580
NOVELLUS SYS IN COM 670008-10-1 3675930 30000 30000 30000
ORACLE CORP COM 68389X-10-5 22000768 196325 196325 196325
PENNEY J C INC COM 708160-10-6 415707 20850 20850 20850
PEPSICO INC COM 713448-10-8 5640000 160000 160000 160000
PHELPS DODGE CO COM 717265-10-2 3876758 57540 57540 57540
PITNEY BOWES IN COM 724479-10-0 5314430 110000 110000 110000
PNC BK CORP COM 693475-10-5 5518000 124000 124000 124000
POST PPTYS INC COM 737464-10-7 2352375 61500 61500 61500
PPG INDS INC COM 693506-10-7 7438741 118900 118900 118900
QUAKER OATS CO COM 747402-10-5 9843750 150000 150000 150000
QUEST DIAGNOSTI COM 74834L-10-0 1017137 33280 33280 33280
RAYTHEON CO CL A 755111-30-9 249123 10040 10040 10040
RAYTHEON CO CL B 755111-40-8 3187560 120000 120000 120000
READERS DIGEST CL A NON VTG 755267-10-1 1316250 45000 45000 45000
RUBY TUESDAY IN COM 781182-10-0 2659995 146250 146250 146250
SBC COMMUNICATI COM 78387G-10-3 4377458 89794 89794 89794
SCHERING PLOUGH COM 806605-10-1 24940400 588564 588564 588564
SCUDDER NEW ASI COM 811183-10-2 1724722 87050 87050 87050
SEAGATE TECHNOL COM 811804-10-3 2328150 50000 50000 50000
SEMPRA ENERGY COM 816851-10-9 2416880 139101 139101 139101
SMITHKLINE BEEC ADR REP ORD 832378-30-1 10260000 160000 160000 160000
SONOSITE INC COM 83568G-10-4 527062 16666 16666 16666
SPACELABS MED I COM 846247-10-4 928150 50000 50000 50000
SPRINT CORP COM FON GROUP 852061-10-0 12116340 180000 180000 180000
SPRINT CORP PCS COM SER 1 852061-50-6 4612500 45000 45000 45000
SPX CORP COM 784635-10-4 2151485 26623 26623 26623
STATE STR CORP COM 857477-10-3 20632991 282400 282400 282400
SUN MICROSYSTEM COM 866810-10-4 61950400 800000 800000 800000
SYSCO CORP COM 871829-10-7 15825200 400000 400000 400000
SYSTEM SOFTWARE COM NEW 871839-20-5 7500 3750 3750 3750
TELEPHONE & DAT COM 879433-10-0 6300000 50000 50000 50000
TEMPLE INLAND I COM 879868-10-7 4450815 67500 67500 67500
TERADYNE INC COM 880770-10-2 264000 4000 4000 4000
TEXACO INC COM 881694-10-3 6747847 124240 124240 124240
TEXAS INSTRS IN COM 882508-10-4 5864171 60690 60690 60690
TEXTRON INC COM 883203-10-1 11503200 150000 150000 150000
TIME WARNER INC COM 887315-10-9 18512128 256000 256000 256000
TRICON GLOBAL R COM 895953-10-7 618000 16000 16000 16000
UNION PAC CORP COM 907818-10-8 1398016 32000 32000 32000
UNION PAC RES G COM 907834-10-5 3035801 238102 238102 238102
UNITED TECHNOLO COM 913017-10-9 13852800 213120 213120 213120
UNUMPROVIDENT C COM 91529Y-10-6 4120096 128500 128500 128500
U S WEST INC NE COM 91273H-10-1 3328416 46228 46228 46228
USX-US STL COM 90337T-10-1 564300 17100 17100 17100
VODAFONE AIRTOU SPONSORED ADR 92857T-10-7 5816250 117500 117500 117500
WACHOVIA CORP COM 929771-10-3 6528000 96000 96000 96000
WAL MART STORES COM 931142-10-3 12152175 175800 175800 175800
WARNER LAMBERT COM 934488-10-7 17370856 212000 212000 212000
WEYERHAEUSER CO COM 962166-10-4 3411114 47500 47500 47500
XEROX CORP COM 984121-10-3 1316808 58040 58040 58040
</TABLE>
