<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: 6/30/99
-----------------------
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 7/16/99
- ------------------------------- ----------------- -------------
[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>
/ / 13F NOTICE. (Check here if no holdings reported are in this report,
and all holdings are reported by other reporting manager(s).)
/ / 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-
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[Repeat as necessary.]
<PAGE>
FORM 13F INFORMATION TABLE
<TABLE>
<CAPTION>
COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8
- --------------------------------- ---------------- --------- -------- ----------------- ---------- --------- -----------------------
VALUE SHRS OR SH/ PUT/ INVSTMNT OTHER VOTING AUTHORITY
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>
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
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</TABLE>
[Repeat as necessary]
<PAGE>
Form 13F SUMMARY PAGE
Report Summary:
Number of Other Included Managers: 0
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Form 13F Information Table Entry Total:
--------------------
Form 13F Information Table Value Total: $17468266
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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
JUNE 30, 1999
<TABLE>
<CAPTION>
VOTING AUTHORITY
TITLE OF VALUE SHARES/ SH/ PUT/ INVSTMT --------------------
NAME OF ISSUER 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>
A D C TELECOMMUNICATION COM 000886101 17721 388940 SH Sole 388940
ADOBE SYS INC COM 00724F101 559084 6805155 SH Sole 6805155
ADVANCED FIBRE COMMNCT COM 00754A105 41839 2677680 SH Sole 2677680
AIRBORNE FGHT CORP COM 009266107 94138 3400000 SH Sole 3400000
ALASKA AIRGROUP INC. COM 011659109 25050 600000 SH Sole 600000
ALCOA INC COM 013817101 38480 621900 SH Sole 621900
ALEXANDER & BALDWIN COM 014482103 16396 736900 SH Sole 736900
AMERADA HESS CORP COM 023551104 31190 524200 SH Sole 524200
AMERICA WEST HOLDINGS CL B COM 023657208 16044 850000 SH Sole 850000
AMERICAN AXLE & MFG. COM 024061103 7018 501300 SH Sole 501300
AMERICAN INTL GROUP COM 026874107 4771 40692 SH Sole 40692
AMGEN INC. COM 031162100 19541 321000 SH Sole 321000
AMR CORP COM 001765106 693801 10165580 SH Sole 10165580
ARVIN INDS INC COM 043339100 49230 1299800 SH Sole 1299800
AT&T Corp Liberty Media Grp A COM 001957208 25993 707300 SH Sole 707300
ATLANTIC COAST AIR HLD COM 048396105 7220 380000 SH Sole 380000
AUTOZONE INC. COM 053332102 20862 692500 SH Sole 692500
BANC ONE CORP COM 06423A103 94557 1587520 SH Sole 1587520
BELDEN INC COM 077459105 16814 702400 SH Sole 702400
BERKLEY W R CORP COM 084423102 17858 714300 SH Sole 714300
BERKSHIRE HATHAWAY INC CLB COM 084670207 5114 2283 SH Sole 2283
BIOCHEM PHARMA INC COM 09058T108 27105 1445600 SH Sole 1445600
BIOGEN INC COM 090597105 8554 133000 SH Sole 133000
BLOCK DRUG INC CL A COM 093644102 11593 278100 SH Sole 278100
BOISE CASCADE CORP COM 097383103 28191 657525 SH Sole 657525
BOSTON SCIENTIFIC CORP COM 101137107 105942 2411200 SH Sole 2411200
BROWN FORMAN CORP CL B COM 115637209 63134 968500 SH Sole 968500
BURLINGTON RES INC COM 122014103 115101 2661300 SH Sole 2661300
</TABLE>
<PAGE>
PRIMECAP Management Company
FORM 13F
JUNE 30, 1999
<TABLE>
<CAPTION>
VOTING AUTHORITY
TITLE OF VALUE SHARES/ SH/ PUT/ INVSTMT --------------------
NAME OF ISSUER 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>
CANADIAN PAC LTD NEW COM 135923100 47284 1985700 SH Sole 1985700
CATERPILLAR INC DEL COM 149123101 228707 3811780 SH Sole 3811780
CENTOCOR INC COM 152342101 370874 7954400 SH Sole 7954400
CHICAGO BRIDGE & IRON COM N19808109 4378 314100 SH Sole 314100
CHUBB CORP. COM 171232101 21059 303000 SH Sole 303000
CIT GROUP INC CL A COM 125577106 71078 2461590 SH Sole 2461590
CITY NATL CORP COM 178566105 11710 312785 SH Sole 312785
CLEARNET COMMUNS. INC COM 184902104 25645 1840000 SH Sole 1840000
CNET INC COM 125945105 1729 30000 SH Sole 30000
CNF TRANSN INC COM 12612W104 28001 727300 SH Sole 727300
COHERENT INC COM 192479103 44328 2380000 SH Sole 2380000
COMAIR HOLDINGS INC COM 199789108 4995 240000 SH Sole 240000
COMPAQ COMPUTER CORP COM 204493100 184336 7782011 SH Sole 7782011
CORNING INC COM 219350105 47636 679300 SH Sole 679300
COSTCO COMPANIES INC COM 22160Q102 235409 2940320 SH Sole 2940320
CUMMINS ENGINE INC COM 231021106 21845 382400 SH Sole 382400
CUNO INC COM 126583103 4590 240000 SH Sole 240000
CYPRUS AMAX MINERALS COM 232809103 8755 574100 SH Sole 574100
DAYTON HUDSON CORP COM 239753106 12578 193500 SH Sole 193500
DEERE & CO COM 244199105 101837 2598700 SH Sole 2598700
DELPHI AUTOMOTIVE SYS COM 247126105 29639 1602094 SH Sole 1602094
DELTA AIR LINES DEL COM 247361108 689431 11964100 SH Sole 11964100
DIGENE CORP COM 253752109 3756 340000 SH Sole 340000
DILLARDS INC CL A COM 254067101 54163 1542000 SH Sole 1542000
DIONEX CORP COM 254546104 41310 1020000 SH Sole 1020000
DONALDSON INC COM 257651109 26460 1080000 SH Sole 1080000
DRESS BARN INC COM 261570105 5819 363700 SH Sole 363700
ENGELHARD CORP COM 292845104 162555 7184750 SH Sole 7184750
</TABLE>
<PAGE>
PRIMECAP Management Company
FORM 13F
JUNE 30, 1999
<TABLE>
<CAPTION>
VOTING AUTHORITY
TITLE OF VALUE SHARES/ SH/ PUT/ INVSTMT --------------------
NAME OF ISSUER 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>
ENRON CORP COM 293561106 1799 22000 SH Sole 22000
ERICSSON L M TEL CO ADR CLB COM 294821400 400517 12159910 SH Sole 12159910
ERICSSON TEL 4.25% CV ADR COM 294821509 15262 1756800 SH Sole 1756800
EVANS & SUTHERLAND COMPUTER COM 299096107 10973 840000 SH Sole 840000
F M C CORP COM NEW COM 302491303 25808 377800 SH Sole 377800
FARR CO COM 311648109 2750 250000 SH Sole 250000
FDX CORP COM 31304N107 976890 18007180 SH Sole 18007180
FILENES BASEMENT CORP COM 316866102 1416 985000 SH Sole 985000
FIRST REPUBLIC COM 336158100 752 26000 SH Sole 26000
FLEETWOOD ENTERPRISES COM 339099103 76287 2885500 SH Sole 2885500
FORD MTR CO DEL COM 345370100 282 5000 SH Sole 5000
FOX ENTERTAINMENT GRP COM 35138T107 40406 1500000 SH Sole 1500000
FRONTIER CORP. COM 35906P105 76682 1308000 SH Sole 1308000
GAP INC DEL COM 364760108 5478 108750 SH Sole 108750
GC COS INC COM 36155Q109 7150 200000 SH Sole 200000
GENERAL MOTORS HUGHES COM 370442832 220785 3920670 SH Sole 3920670
GENERAL MTRS CORP COM 370442105 81869 1240440 SH Sole 1240440
GEORGIA PAC CORP COM TIMBER G COM 373298702 3881 153700 SH Sole 153700
GEORGIA-PACIFIC CORP COM 373298108 14625 308700 SH Sole 308700
GRANITE CONSTR INC COM 387328107 61556 2100000 SH Sole 2100000
GUIDANT CORP COM 401698105 448812 8778728 SH Sole 8778728
HARCOURT GEN INC COM 41163G101 205286 3981300 SH Sole 3981300
HARMONIC LIGHTWAVES COM 413160102 26410 459800 SH Sole 459800
HCC INSURANCE HOLDINGS COM 404132102 2496 110000 SH Sole 110000
HEWLETT PACKARD CO COM 428236103 469058 4667240 SH Sole 4667240
HOUGHTON MIFFLIN CO COM 441560109 14900 316600 SH Sole 316600
ICOS CORP COM 449295104 1633 40000 SH Sole 40000
IDEC PHARMACEUTICALS COM 449370105 18996 246500 SH Sole 246500
</TABLE>
<PAGE>
PRIMECAP Management Company
FORM 13F
JUNE 30, 1999
<TABLE>
<CAPTION>
VOTING AUTHORITY
TITLE OF VALUE SHARES/ SH/ PUT/ INVSTMT --------------------
NAME OF ISSUER 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>
INPUT/OUTPUT INC COM 457652105 31378 4149200 SH Sole 4149200
INTEL CORP COM 458140100 606365 10191000 SH Sole 10191000
INTL PAPER CO COM 460146103 14542 289400 SH Sole 289400
JOHNSON & JOHNSON COM 478160104 107888 1100900 SH Sole 1100900
JONES APPEL GROUP COM 480074103 492 14331 SH Sole 14331
KENNAMETAL INC COM 489170100 53047 1711200 SH Sole 1711200
LANDEC CORP COM 514766104 3806 1015000 SH Sole 1015000
LATTICE SEMICONDUCTOR COM 518415104 38185 613420 SH Sole 613420
LEUCADIA NATL CORP COM 527288104 10183 401300 SH Sole 401300
LEXMARK INTL GRP INC CL A COM 529771107 117939 1800600 SH Sole 1800600
LIBERTY CORP S C COM 530370105 26640 488800 SH Sole 488800
LILLY ELI & CO COM 532457108 50739 708396 SH Sole 708396
LINDSAY MFG CO COM 535555106 11458 652400 SH Sole 652400
LOWES COS INC COM 548661107 25039 441700 SH Sole 441700
LSI LOGIC CORP COM 502161102 105227 2281340 SH Sole 2281340
MACDERMID INC COM 554273102 79097 1701000 SH Sole 1701000
MANPOWER INC COM 56418H100 98765 4365300 SH Sole 4365300
MATTEL INC COM 577081102 10466 400600 SH Sole 400600
MAXIM INTEGRATED PRODS COM 57772K101 6650 100000 SH Sole 100000
MCCLATCHY CO CL A COM 579489105 33456 1010000 SH Sole 1010000
MEDTRONIC INC COM 585055106 153717 1973900 SH Sole 1973900
MENTOR CORP MINN COM 587188103 454 24400 SH Sole 24400
MICRON TECHNOLOGY INC COM 595112103 520911 12862000 SH Sole 12862000
MIDWEST EXPRESS HOLDINGS COM 597911106 26455 778100 SH Sole 778100
MILLIPORE CORP COM 601073109 175858 4335420 SH Sole 4335420
MISSISSIPPI CHEM COM NEW COM 605288208 5954 606800 SH Sole 606800
MOLEX INC COM 608554101 7227 195312 SH Sole 195312
MOLEX INC CL A COM 608554200 6152 195312 SH Sole 195312
</TABLE>
<PAGE>
PRIMECAP Management Company
FORM 13F
JUNE 30, 1999
<TABLE>
<CAPTION>
VOTING AUTHORITY
TITLE OF VALUE SHARES/ SH/ PUT/ INVSTMT --------------------
NAME OF ISSUER 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>
MOTOROLA, INC. COM 620076109 636876 6721650 SH Sole 6721650
NEIMAN MARCUS GRP COM 640204103 104167 4055180 SH Sole 4055180
NEWS CORP LTD ADR COM 652487802 87419 2769700 SH Sole 2769700
NIKE INC CL B COM 654106103 11154 176000 SH Sole 176000
NOBLE AFFILIATES INC COM 654894104 59194 2100000 SH Sole 2100000
NOKIA CORP SPONSORED ADR COM 654902204 92094 1005810 SH Sole 1005810
NORFOLK SOUTHERN COM 655844108 8095 268700 SH Sole 268700
NORTEL NETWORKS CORP. COM 656569100 532912 6138660 SH Sole 6138660
NOVARTIS AG -SPON ADR COM 66987v109 70696 968300 SH Sole 968300
OM GROUP INC COM 670872100 41918 1215000 SH Sole 1215000
OPTIMAL ROBOTICS COM 68388R208 2882 290000 SH Sole 290000
ORTEL CORP COM 68749W102 11412 1074060 SH Sole 1074060
PALL CORP COM 696429307 16641 750000 SH Sole 750000
PE CORP.-CELERA GENOMICS COM 69332S201 17164 1060300 SH Sole 1060300
PE CORP.-PE BIOSYSTEMS COM 69332S102 190508 1660200 SH Sole 1660200
PETSMART INC COM 716768106 38729 3778400 SH Sole 3778400
PHARMACIA & UPJOHN COM 716941109 640461 11273150 SH Sole 11273150
PINNACLE WEST CAP CORP COM 723484101 14498 360200 SH Sole 360200
PITNEY BOWES INC COM 724479100 195763 3046900 SH Sole 3046900
PLANTRONICS INC NEW COM 727493108 104721 1608000 SH Sole 1608000
POGO PRODUCING CO COM 730448107 65905 3538500 SH Sole 3538500
POTASH CORP SASK INC COM 73755L107 115692 2235600 SH Sole 2235600
POWERWAVE TECHN COM 739363109 15573 482880 SH Sole 482880
QUESTAR CORP COM 748356102 9157 478800 SH Sole 478800
RESEARCH IN MOTION COM 760975102 23288 1150000 SH Sole 1150000
ROBERT HALF INTL COM 770323103 76265 2954500 SH Sole 2954500
ROMAC INTERNATIONAL CORP COM 775835101 7633 860000 SH Sole 860000
ROUSE CO COM 779273101 9856 388400 SH Sole 388400
</TABLE>
<PAGE>
PRIMECAP Management Company
FORM 13F
JUNE 30, 1999
<TABLE>
<CAPTION>
VOTING AUTHORITY
TITLE OF VALUE SHARES/ SH/ PUT/ INVSTMT --------------------
NAME OF ISSUER 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>
RYDER SYS INC COM 783549108 29293 1137600 SH Sole 1137600
SABRE GRP HLDGS INC CL A COM 785905100 186891 2718410 SH Sole 2718410
SCHLUMBERGER LTD COM 806857108 128272 2014080 SH Sole 2014080
SEAGRAM LTD COM 811850106 224758 4461700 SH Sole 4461700
SIGMA ALDRICH CORP COM 826552101 80257 2330500 SH Sole 2330500
SKYLINE CORP COM 830830105 7406 252650 SH Sole 252650
SONY CORP ADR NEW COM 835699307 395761 3585600 SH Sole 3585600
SOUTHWEST AIRLS CO COM 844741108 301263 9679125 SH Sole 9679125
ST PAUL COS INC COM 792860108 44757 1406900 SH Sole 1406900
STEPAN CO COM 858586100 3405 134200 SH Sole 134200
STRATTEC SEC CORP COM 863111100 12211 361800 SH Sole 361800
SUPERIOR NATL INS GRP COM 868224106 10584 388400 SH Sole 388400
SYMBOL TECHNOLOGIES COM 871508107 88500 2400000 SH Sole 2400000
TEKTRONIX INC COM 879131100 152660 5057060 SH Sole 5057060
TELLABS INC COM 879664100 162150 2400000 SH Sole 2400000
TEMPLE INLAND INC COM 879868107 125549 1829500 SH Sole 1829500
TEXAS INSTRS INC COM 882508104 1297679 9011660 SH Sole 9011660
TIFFANY & CO. COM 886547108 7739 80200 SH Sole 80200
TJX COS INC NEW COM 872540109 8395 252000 SH Sole 252000
TMP WORLDWIDE INC COM 872941109 1270 20000 SH Sole 20000
TORCHMARK CORP COM 891027104 133309 3906500 SH Sole 3906500
TOSCO CORP COM 891490302 31281 1206000 SH Sole 1206000
TRANSATLANTIC HLDGS COM 893521104 42152 562500 SH Sole 562500
TRIPOS INC COM 896928108 784 95000 SH Sole 95000
UAL CORP COM PAR $0.01 COM 902549500 164860 2551025 SH Sole 2551025
UMB FINANCIAL CORP COM 902788108 2144 50000 SH Sole 50000
UNION PAC RES GRP COM 907834105 100193 6142100 SH Sole 6142100
US AIRWAYS GROUP INC COM 911905107 1786 41000 SH Sole 41000
</TABLE>
<PAGE>
PRIMECAP Management Company
FORM 13F
JUNE 30, 1999
<TABLE>
<CAPTION>
VOTING AUTHORITY
TITLE OF VALUE SHARES/ SH/ PUT/ INVSTMT --------------------
NAME OF ISSUER 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>
USA NETWORKS INC COM 902984103 21262 529900 SH Sole 529900
VARCO INTL INC COM 922126107 29972 2772000 SH Sole 2772000
WELLS FARGO & CO. COM 949746101 2736 64000 SH Sole 64000
WILLAMETTE INDS INC COM 969133107 17140 372100 SH Sole 372100
XILINX INC COM 983919101 247057 4315400 SH Sole 4315400
ZENITH NATL INS CORP COM 989390109 11039 448300 SH Sole 448300
REPORT SUMMARY 174 DATA RECORDS 17468266 0 OTHER MANAGERS ON WHOSE BEHALF REPORT IS FILED
</TABLE>
