<PAGE>
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Form 13F
Form 13F COVER PAGE
Report for the Calendar Year or Quarter Ended: 3/31/99
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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: PRIMECAP Management Co.
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Address: 225 South Lake Avenue, Ste. 400
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Pasadena, CA 91101
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Form 13F File Number: 28-
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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: Rachel Aguilera
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Title: Client Account Administrator
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Phone: 626/304-9222
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Signature, Place, and Date of Signing:
/s/ Rachel Aguilera Pasadena, CA 5/19/99
- ------------------------------- ----------------- -------------
[Signature] [City, State] [Date]
Report Type (Check only one.):
/X/ 13F HOLDINGS REPORT. (Check here if all holdings of this reporting
manager are reported in this report.)
<PAGE>
Form 13F SUMMARY PAGE
Report Summary:
Number of Other Included Managers: 0
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Form 13F Information Table Entry Total:
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Form 13F Information Table Value Total: $15126034
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(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
28- "NONE"
------ ----------------- ---------------------------------
[Repeat as necessary.]
<PAGE>
PRIMECAP Management Company
FORM 13F
MARCH 31, 1999
<TABLE>
<CAPTION>
Voting Authority
--------------------
Value Shares/ Sh/ Put/ Invstmt
Name of Issuer Title of class CUSIP (x$1000) Prn Amt Prn Call Dscretn Managers Sole Shared None
- ------------------------------- -------------- --------- -------- ------- ------- ---- ------- -------- -------- ------ ----
<S> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C>
D A D C TELECOMMUNICATION COM COM 000886101 18965 397700 SH Sole 397700
D ADOBE SYS INC COM COM 00724F101 387535 6828815 SH Sole 6828815
D ADVANCED FIBRE COMMNCT COM COM 00754A105 19713 2054700 SH Sole 2054700
D AIRBORNE FGHT CORP COM COM 009266107 105400 3400000 SH Sole 3400000
D ALASKA AIRGROUP INC. COM 011659109 9500 200000 SH Sole 200000
D ALCOA INC COM COM 013817101 29371 713096 SH Sole 713096
D ALEXANDER & BALDWIN COM COM 014482103 14650 746500 SH Sole 746500
D AMERADA HESS CORP COM COM 023551104 26109 513200 SH Sole 513200
D AMERICA WEST HOLDINGS CORP CL COM 023657208 11056 580000 SH Sole 580000
D AMERICAN AXLE & MANUFACTURING COM 024061103 5881 485000 SH Sole 485000
D AMERICAN INTL GROUP COM COM 026874107 61992 513922 SH Sole 513922
D AMR CORP COM COM 001765106 575529 9827600 SH Sole 9827600
D ARVIN INDS INC COM COM 043339100 44026 1306900 SH Sole 1306900
D AT&T Corp Liberty Media Group COM 001957208 49885 948500 SH Sole 948500
D ATLANTIC COAST AIR HLD COM COM 048396105 5062 180000 SH Sole 180000
D BANK ONE CORP COM COM 06423A103 87814 1594800 SH Sole 1594800
D BELDEN INC COM COM 077459105 18811 1102500 SH Sole 1102500
D BERKLEY W R CORP COM COM 084423102 17691 722100 SH Sole 722100
D BERKSHIRE HATHAWAY INC CL B COM 084670207 5367 2283 SH Sole 2283
D BIOCHEM PHARMA INC COM COM 09058T108 6461 303150 SH Sole 303150
D BIOGEN INC COM COM 090597105 8745 76500 SH Sole 76500
D BLOCK DRUG INC CL A COM 093644102 11402 278100 SH Sole 278100
D BOISE CASCADE CORP COM COM 097383103 23421 726225 SH Sole 726225
D BOSTON SCIENTIFIC CORP COM COM 101137107 97967 2411500 SH Sole 2411500
D BROWN FORMAN CORP CL B COM 115637209 55965 971200 SH Sole 971200
D BURLINGTON RES INC COM COM 122014103 102591 2568800 SH Sole 2568800
D CANADIAN PAC LTD NEW COM COM 135923100 38959 1991500 SH Sole 1991500
D CATERPILLAR INC DEL COM COM 149123101 176069 3832800 SH Sole 3832800
D CENTOCOR INC COM COM 152342101 134124 3631100 SH Sole 3631100
</TABLE>
1
<PAGE>
PRIMECAP Management Company
FORM 13F
MARCH 31, 1999
<TABLE>
<CAPTION>
Voting Authority
--------------------
Value Shares/ Sh/ Put/ Invstmt
Name of Issuer Title of class CUSIP (x$1000) Prn Amt Prn Call Dscretn Managers Sole Shared None
- ------------------------------- -------------- --------- -------- ------- ------- ---- ------- -------- -------- ------ ----
<S> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C>
D CHICAGO BRIDGE & IRON COM COM N19808109 2529 213000 SH Sole 213000
D CIT GROUP INC CL A COM 125577106 66892 2188700 SH Sole 2188700
D CITY NATL CORP COM COM 178566105 19188 621485 SH Sole 621485
D CNET INC COM COM 125945105 2764 30000 SH Sole 30000
D CNF TRANSN INC COM COM 12612W104 27902 737900 SH Sole 737900
D COHERENT INC COM COM 192479103 29975 2180000 SH Sole 2180000
D COMAIR HOLDINGS INC COM COM 199789108 2126 90000 SH Sole 90000
D COMPAQ COMPUTER CORP COM COM 204493100 247154 7799732 SH Sole 7799732
D CORNING INC COM COM 219350105 105780 1763000 SH Sole 1763000
D COSTCO COMPANIES INC COM COM 22160Q102 324914 3548550 SH Sole 3548550
D CUMMINS ENGINE INC COM COM 231021106 13816 388500 SH Sole 388500
D CUNO INC COM COM 126583103 2240 160000 SH Sole 160000
D CYPRUS AMAX MINERALS COM COM 232809103 7071 583200 SH Sole 583200
D DAYTON HUDSON CORP COM COM 239753106 12892 193500 SH Sole 193500
D DEERE & CO COM COM 244199105 100525 2602600 SH Sole 2602600
D DELPHI AUTOMOTIVE SYSTEMS COM 247126105 13167 741800 SH Sole 741800
D DELTA AIR LINES DEL COM COM 247361108 827585 11907700 SH Sole 11907700
D DIGENE CORP COM COM 253752109 2520 320000 SH Sole 320000
D DILLARDS INC CL A COM 254067101 40552 1598100 SH Sole 1598100
D DIONEX CORP COM COM 254546104 38505 1020000 SH Sole 1020000
D DONALDSON INC COM COM 257651109 19440 1080000 SH Sole 1080000
D DRESS BARN INC COM COM 261570105 4491 323700 SH Sole 323700
D E TRADE GROUP INC COM COM 269246104 875 15000 SH Sole 15000
D ENGELHARD CORP COM COM 292845104 121295 7161300 SH Sole 7161300
D ENRON CORP COM 293561106 1413 22000 SH Sole 22000
D ERICSSON L M TEL CO ADR CL B S COM 294821400 306012 12850910 SH Sole 12850910
D ERICSSON TEL 4.25% CV ADR REP COM 294821509 11254 1756800 SH Sole 1756800
D EVANS & SUTHERLD CMPTR COM COM 299096107 10080 840000 SH Sole 840000
D F M C CORP COM NEW COM 302491303 16037 324800 SH Sole 324800
</TABLE>
2
<PAGE>
PRIMECAP Management Company
FORM 13F
MARCH 31, 1999
<TABLE>
<CAPTION>
Voting Authority
--------------------
Value Shares/ Sh/ Put/ Invstmt
Name of Issuer Title of class CUSIP (x$1000) Prn Amt Prn Call Dscretn Managers Sole Shared None
- ------------------------------- -------------- --------- -------- ------- ------- ---- ------- -------- -------- ------ ----
<S> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C>
D FARR CO COM COM 311648109 2125 250000 SH Sole 250000
D FDX CORP COM COM 31304N107 852880 9170750 SH Sole 9170750
D FILENES BASEMENT CORP COM COM 316866102 1897 995000 SH Sole 995000
D FIRST REPUBLIC COM 336158100 627 26000 SH Sole 26000
D FLEETWOOD ENTERPRISES COM COM 339099103 78438 2740200 SH Sole 2740200
D FLOWSERVE CORP COM COM 34354P105 14249 915590 SH Sole 915590
D FORD MTR CO DEL COM COM 345370100 283 5000 SH Sole 5000
D FULLER H B CO COM COM 359694106 707 12000 SH Sole 12000
D GAP INC DEL COM COM 364760108 4880 72500 SH Sole 72500
D GC COS INC COM COM 36155Q109 6287 200000 SH Sole 200000
D GENERAL MTRS CORP COM COM 370442105 113718 1307100 SH Sole 1307100
D GEORGIA PAC CORP COM TIMBER G COM 373298702 3485 155300 SH Sole 155300
D GEORGIA PAC CORP COM GA PAC GR COM 373298108 11531 155300 SH Sole 155300
D GRANITE CONSTR INC COM COM 387328107 49087 2100000 SH Sole 2100000
D GUIDANT CORP COM COM 401698105 532595 8803228 SH Sole 8803228
D HARCOURT GEN INC COM COM 41163G101 172460 3891900 SH Sole 3891900
D HARMONIC LIGHTWAVES COM COM 413160102 15779 571200 SH Sole 571200
D HEWLETT PACKARD CO COM COM 428236103 317417 4680800 SH Sole 4680800
D HOUGHTON MIFFLIN CO COM COM 441560109 15042 320900 SH Sole 320900
D ICOS CORP COM 449295104 1012 30000 SH Sole 30000
D IDEC PHARMACEUTICALS COM COM 449370105 12772 248600 SH Sole 248600
D INPUT/OUTPUT INC COM COM 457652105 9983 1581400 SH Sole 1581400
D INTEL CORP COM COM 458140100 668173 5620800 SH Sole 5620800
D INTL PAPER CO COM COM 460146103 12428 294600 SH Sole 294600
D JOHNSON & JOHNSON COM COM 478160104 117109 1252500 SH Sole 1252500
D KENNAMETAL INC COM COM 489170100 30292 1718700 SH Sole 1718700
D LANDEC CORP COM COM 514766104 3487 930000 SH Sole 930000
D LATTICE SEMICONDUCTOR COM COM 518415104 28319 621550 SH Sole 621550
D LEUCADIA NATL CORP COM COM 527288104 12303 406700 SH Sole 406700
</TABLE>
3
<PAGE>
PRIMECAP Management Company
FORM 13F
MARCH 31, 1999
<TABLE>
<CAPTION>
Voting Authority
--------------------
Value Shares/ Sh/ Put/ Invstmt
Name of Issuer Title of class CUSIP (x$1000) Prn Amt Prn Call Dscretn Managers Sole Shared None
- ------------------------------- -------------- --------- -------- ------- ------- ---- ------- -------- -------- ------ ----
<S> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C>
D LEXMARK INTL GRP INC CL A COM 529771107 101325 905700 SH Sole 905700
D LIBERTY CORP S C COM COM 530370105 25760 491250 SH Sole 491250
D LILLY ELI & CO COM COM 532457108 60370 711286 SH Sole 711286
D LINDSAY MFG CO COM COM 535555106 13116 659900 SH Sole 659900
D LOWES COS INC COM COM 548661107 26723 441700 SH Sole 441700
D LSI LOGIC CORP COM COM 502161102 71461 2291330 SH Sole 2291330
D MACDERMID INC COM COM 554273102 57728 1701000 SH Sole 1701000
D MANPOWER INC COM COM 56418H100 98250 4203200 SH Sole 4203200
D MATTEL INC COM COM 577081102 9062 363400 SH Sole 363400
D MAXIM INTEGRATED PRODS COM COM 57772K101 5412 100000 SH Sole 100000
D MCCLATCHY CO CL A COM 579489105 33562 1000000 SH Sole 1000000
D MEDTRONIC INC COM COM 585055106 147782 2056100 SH Sole 2056100
D MENTOR CORP MINN COM 587188103 358 24400 SH Sole 24400
D MICRON TECHNOLOGY INC COM COM 595112103 566916 11764800 SH Sole 11764800
D MIDWEST EXPRESS HOLDINGS COM 597911106 14558 495600 SH Sole 495600
D MILLIPORE CORP COM COM 601073109 101800 4219700 SH Sole 4219700
D MISSISSIPPI CHEM COM NEW COM 605288208 5779 616400 SH Sole 616400
D MOLEX INC CL A COM 608554200 6037 233312 SH Sole 233312
D MOLEX INC COM COM 608554101 6854 233312 SH Sole 233312
D MOTOROLA INC COM COM 620076109 491965 6716250 SH Sole 6716250
D NEIMAN MARCUS GROUP COM COM 640204103 94224 4164600 SH Sole 4164600
D NIKE INC CL B COM 654106103 10153 176000 SH Sole 176000
D NINE WEST GROUP INC. COM COM 65440D102 16602 672500 SH Sole 672500
D NOBLE AFFILIATES INC COM COM 654894104 60900 2100000 SH Sole 2100000
D NOKIA CORP SPONSORED ADR COM 654902204 173942 1116800 SH Sole 1116800
D NORFOLK SOUTHERN COM COM 655844108 7240 274500 SH Sole 274500
D NORTEL NETWORKS CORPORATION COM 656569100 383201 6168220 SH Sole 6168220
D NOVARTIS AG -SPON ADR COM 66987v109 85594 1055300 SH Sole 1055300
D OM GROUP INC COM COM 670872100 39600 1200000 SH Sole 1200000
</TABLE>
4
<PAGE>
PRIMECAP Management Company
FORM 13F
MARCH 31, 1999
<TABLE>
<CAPTION>
Voting Authority
--------------------
Value Shares/ Sh/ Put/ Invstmt
Name of Issuer Title of class CUSIP (x$1000) Prn Amt Prn Call Dscretn Managers Sole Shared None
- ------------------------------- -------------- --------- -------- ------- ------- ---- ------- -------- -------- ------ ----
<S> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C>
D OM GROUP INC COM COM 670872100 39600 1200000 SH Sole 1200000
D ORTEL CORP COM COM 68749W102 7677 1087000 SH Sole 1087000
D PALL CORP COM COM 696429307 12422 750000 SH Sole 750000
D PERKIN ELMER CORP COM COM 714041100 161580 1664700 SH Sole 1664700
D PETSMART INC COM COM 716768106 31088 3871000 SH Sole 3871000
D PHARMACIA & UPJOHN COM COM 716941109 635439 10187400 SH Sole 10187400
D PINNACLE WEST CAP CORP COM COM 723484101 13586 373500 SH Sole 373500
D PIONEER HI BRED INTL COM COM 723686101 49906 1326400 SH Sole 1326400
D PITNEY BOWES INC COM COM 724479100 194865 3056700 SH Sole 3056700
D PLANTRONICS INC NEW COM COM 727493108 100600 1608000 SH Sole 1608000
D POGO PRODUCING CO COM COM 730448107 44369 3413000 SH Sole 3413000
D POTASH CORP SASK INC COM COM 73755L107 119054 2225300 SH Sole 2225300
D POWERWAVE TECHN COM COM 739363109 9555 336750 SH Sole 336750
D QUESTAR CORP COM COM 748356102 6384 376900 SH Sole 376900
D RESEARCH IN MOTION COM 760975102 9975 950000 SH Sole 950000
D ROMAC INTERNATIONAL CORP COM 775835101 6800 800000 SH Sole 800000
D ROUSE CO COM COM 779273101 8757 394700 SH Sole 394700
D RYDER SYS INC COM COM 783549108 23724 858800 SH Sole 858800
D SABRE GROUP HLDGS INC CL A COM 785905100 112077 2470010 SH Sole 2470010
D SBC COMMUNICATIONS INC COM COM 78387G103 226 4800 SH Sole 4800
D SCHLUMBERGER LTD COM COM 806857108 121928 2025800 SH Sole 2025800
D SEAGRAM LTD COM COM 811850106 270090 5401800 SH Sole 5401800
D SIGMA ALDRICH CORP COM COM 826552101 43875 1500000 SH Sole 1500000
D SKYLINE CORP COM COM 830830105 7297 262950 SH Sole 262950
D SONY CORP ADR NEW COM 835699307 328068 3592800 SH Sole 3592800
D SOUTHWEST AIRLS CO COM COM 844741108 293173 9691675 SH Sole 9691675
D ST PAUL COS INC COM COM 792860108 43804 1410200 SH Sole 1410200
D STEPAN CO COM COM 858586100 5347 240300 SH Sole 240300
D STRATTEC SEC CORP COM COM 863111100 6795 241600 SH Sole 241600
D SUPERIOR NATL INS GRP COM 868224106 1885 99200 SH Sole 99200
</TABLE>
5
<PAGE>
PRIMECAP Management Company
FORM 13F
MARCH 31, 1999
<TABLE>
<CAPTION>
Voting Authority
--------------------
Value Shares/ Sh/ Put/ Invstmt
Name of Issuer Title of class CUSIP (x$1000) Prn Amt Prn Call Dscretn Managers Sole Shared None
- ------------------------------- -------------- --------- -------- ------- ------- ---- ------- -------- -------- ------ ----
<S> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C>
D SYMBOL TECHNOLOGIES COM COM 871508107 81000 1800000 SH Sole 1800000
D TEKTRONIX INC COM COM 879131100 125312 4962850 SH Sole 4962850
D TELLABS INC COM COM 879664100 156400 1600000 SH Sole 1600000
D TEMPLE INLAND INC COM COM 879868107 115893 1846900 SH Sole 1846900
D TEXAS INSTRS INC COM COM 882508104 905537 9123800 SH Sole 9123800
D THE NEWS CORP LTD ADR COM 652487802 19110 694900 SH Sole 694900
D TJX COS INC NEW COM COM 872540109 6344 186600 SH Sole 186600
D TMP WORLDWIDE INC COM COM 872941109 1685 26000 SH Sole 26000
D TORCHMARK CORP COM COM 891027104 124049 3922500 SH Sole 3922500
D TOSCO CORP COM 891490302 26155 1054100 SH Sole 1054100
D TRANSATLANTIC HLDGS COM COM 893521104 42187 562500 SH Sole 562500
D TRIPOS INC COM COM 896928108 831 95000 SH Sole 95000
D UAL CORP COM PAR $0.01 COM 902549500 193737 2487800 SH Sole 2487800
D UNION PAC RES GROUP COM COM 907834105 70207 5912200 SH Sole 5912200
D US AIRWAYS GROUP INC COM COM 911905107 2001 41000 SH Sole 41000
D USA NETWORKS INC COM COM 902984103 19199 536100 SH Sole 536100
D VARCO INTL INC COM COM 922126107 29637 2664000 SH Sole 2664000
D WELLS FARGO & CO. COM 949746101 2244 64000 SH Sole 64000
D WILLAMETTE INDS INC COM COM 969133107 14292 378600 SH Sole 378600
D XILINX INC COM COM 983919101 175554 4328000 SH Sole 4328000
D ZENITH NATL INS CORP COM 989390109 9611 395300 SH Sole 395300
S REPORT SUMMARY 166 DATA RECORDS 15126034 0 OTHER MANAGERS ON WHOSE BEHALF REPORT IS FILED
</TABLE>
6
