<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: 12/31/99
-----------------------
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 Company
-------------------------------
Address: 225 South Lake Avenue, Ste. 400
-------------------------------
Pasadena, CA 91101
-------------------------------
-------------------------------
Form 13F File Number: 28- 01469
---------------------
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
-------------------------------
Title: Client Account Administrator
-------------------------------
Phone: 626/304-9222
-------------------------------
Signature, Place, and Date of Signing:
Rachel Aguilera Pasadena, CA 1/6/2000
- ------------------------------- ----------------- -------------
[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-
--------------- ------------------------------------
[Repeat as necessary.]
<PAGE>
<TABLE>
<CAPTION>
FORM 13F INFORMATION TABLE
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>
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
[Repeat as necessary]
<PAGE>
Form 13F SUMMARY PAGE
Report Summary:
Number of Other Included Managers: 0
--------------------
Form 13F Information Table Entry Total:
--------------------
Form 13F Information Table Value Total: $ 22212387
--------------------
(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
DECEMBER 31, 1999
<TABLE>
<CAPTION>
Value Shares/ Sh/ Put/ Invstmt Other
Name of Issuer Title of class CUSIP (x$1000) Prn Amt Prn Call Dscretn Managers
- ------------------------------ ---------------- --------- -------- -------- --- ---- ------- --------
<S> <C> <C> <C> <C> <C> <C> <C> <C>
A D C TELECOMMUNICATION COM 000886101 21877 301490 SH Sole
ABERCROMBIE & FITCH CO CL A COM 002896207 32559 1220000 SH Sole
ADOBE SYS INC COM 00724F101 871505 12959175 SH Sole
ADVANCED FIBRE COMMNCT COM 00754A105 106602 2385500 SH Sole
AGILENT TECHONOLOGIES INC COM 008466101 26959 348700 SH Sole
AIRBORNE FGHT CORP COM 009266107 74800 3400000 SH Sole
ALASKA AIRGROUP INC. COM 011659109 61188 1742000 SH Sole
ALBERTSONS INC. COM 013104104 25187 781000 SH Sole
ALCOA INC COM 013817101 40014 482100 SH Sole
ALEXANDER & BALDWIN COM 014482103 18957 831000 SH Sole
AMERADA HESS CORP COM 023551104 30293 533800 SH Sole
AMERICA WEST HOLDINGS CL B COM 023657208 49281 2375000 SH Sole
AMERICAN AXLE & MFG. COM 024061103 6487 535000 SH Sole
AMGEN INC. COM 031162100 28410 473000 SH Sole
AMR CORP COM 001765106 842853 12579900 SH Sole
ARVIN INDS INC COM 043339100 37001 1304000 SH Sole
ATLANTIC COAST AIR HLD COM 048396105 26125 1100000 SH Sole
AUTOZONE INC. COM 053332102 28506 882200 SH Sole
BANC ONE CORP COM 06423A103 83576 2611740 SH Sole
BELDEN INC COM 077459105 11718 558000 SH Sole
BERKLEY W R CORP COM 084423102 16999 814300 SH Sole
BERKSHIRE HATHAWAY INC CLB COM 084670207 4178 2283 SH Sole
BIOCHEM PHARMA INC COM 09058T108 77882 3580790 SH Sole
BIOGEN INC COM 090597105 9126 108000 SH Sole
BIOMET INC. COM 090613100 168428 4210700 SH Sole
BLOCK DRUG INC CL A COM 093644102 8880 286443 SH Sole
BOISE CASCADE CORP COM 097383103 26773 661055 SH Sole
BOSTON SCIENTIFIC CORP COM 101137107 61089 2792650 SH Sole
</TABLE>
<TABLE>
<CAPTION>
Voting Authority
--------------------------------
Name of Issuer Sole Shared None
- ------------------------------ ---------- -------- --------
<S> <C> <C> <C>
A D C TELECOMMUNICATION 301490
ABERCROMBIE & FITCH CO CL A 3000 1217000
ADOBE SYS INC 2449175 10510000
ADVANCED FIBRE COMMNCT 755500 1630000
AGILENT TECHONOLOGIES INC 239255 109445
AIRBORNE FGHT CORP 3400000
ALASKA AIRGROUP INC. 1742000
ALBERTSONS INC. 781000
ALCOA INC 482100
ALEXANDER & BALDWIN 831000
AMERADA HESS CORP 533800
AMERICA WEST HOLDINGS CL B 2375000
AMERICAN AXLE & MFG. 535000
AMGEN INC. 473000
AMR CORP 2637900 9942000
ARVIN INDS INC 524000 780000
ATLANTIC COAST AIR HLD 1100000
AUTOZONE INC. 582200 300000
BANC ONE CORP 658740 1953000
BELDEN INC 558000
BERKLEY W R CORP 644300 170000
BERKSHIRE HATHAWAY INC CLB 2283
BIOCHEM PHARMA INC 1901290 1679500
BIOGEN INC 1200 106800
BIOMET INC. 275700 3935000
BLOCK DRUG INC CL A 286443
BOISE CASCADE CORP 661055
BOSTON SCIENTIFIC CORP 360650 2432000
</TABLE>
<PAGE>
PRIMECAP Management Company
FORM 13F
DECEMBER 31, 1999
<TABLE>
<CAPTION>
Value Shares/ Sh/ Put/ Invstmt Other
Name of Issuer Title of class CUSIP (x$1000) Prn Amt Prn Call Dscretn Managers
- ------------------------------ ---------------- --------- -------- -------- --- ---- ------- --------
<S> <C> <C> <C> <C> <C> <C> <C> <C>
BROWN FORMAN CORP CL B COM 115637209 41918 732200 SH Sole
BURLINGTON RES INC COM 122014103 42221 1277000 SH Sole
CANADIAN PAC LTD NEW COM 135923100 17828 826800 SH Sole
CATERPILLAR INC DEL COM 149123101 193341 4108170 SH Sole
CHICAGO BRIDGE & IRON COM N19808109 4615 335600 SH Sole
CHIRON CORP COM 170040109 95267 2248200 SH Sole
CHUBB CORP. COM 171232101 47685 846800 SH Sole
CIT GROUP INC CL A COM 125577106 98214 4649200 SH Sole
CLEARNET COMMUNS. INC COM 184902104 73780 2146330 SH Sole
CNF TRANSN INC COM 12612W104 29780 863200 SH Sole
COHERENT INC COM 192479103 64735 2420000 SH Sole
COMPAQ COMPUTER CORP COM 204493100 273006 10087970 SH Sole
CONCURRENT COMPUTER CORP COM 206710204 83440 4465000 SH Sole
COSTCO WHOLESALE CORP. COM 22160K105 115003 1260310 SH Sole
CUMMINS ENGINE INC COM 231021106 18494 382800 SH Sole
CUNO INC COM 126583103 12000 600000 SH Sole
DAYTON HUDSON CORP COM 239753106 20173 274700 SH Sole
DEERE & CO COM 244199105 106204 2448500 SH Sole
DELPHI AUTOMOTIVE SYS COM 247126105 19039 1208800 SH Sole
DELTA AIR LINES DEL COM 247361108 725900 14572650 SH Sole
DESCARTES SYS GRP INC COM 249906108 69768 3245000 SH Sole
DIGENE CORP COM 253752109 5929 340000 SH Sole
DILLARDS INC CL A COM 254067101 25063 1241500 SH Sole
DIONEX CORP COM 254546104 42011 1020000 SH Sole
DONALDSON INC COM 257651109 25988 1080000 SH Sole
DOW CHEMICAL COMPANY COM 260543103 23117 173000 SH Sole
DRESS BARN INC COM 261570105 10901 655700 SH Sole
ENGELHARD CORP COM 292845104 142432 7546050 SH Sole
</TABLE>
<TABLE>
<CAPTION>
Voting Authority
--------------------------------
Name of Issuer Sole Shared None
- ------------------------------ ---------- -------- --------
<S> <C> <C> <C>
BROWN FORMAN CORP CL B 732200
BURLINGTON RES INC 801900 475100
CANADIAN PAC LTD NEW 826800
CATERPILLAR INC DEL 1338170 2770000
CHICAGO BRIDGE & IRON 275600 60000
CHIRON CORP 603200 1645000
CHUBB CORP. 346800 500000
CIT GROUP INC CL A 1162500 3486700
CLEARNET COMMUNS. INC 467830 1678500
CNF TRANSN INC 863200
COHERENT INC 2420000
COMPAQ COMPUTER CORP 1327970 8760000
CONCURRENT COMPUTER CORP 4465000
COSTCO WHOLESALE CORP. 260310 1000000
CUMMINS ENGINE INC 382800
CUNO INC 600000
DAYTON HUDSON CORP 4700 270000
DEERE & CO 2448500
DELPHI AUTOMOTIVE SYS 1208800
DELTA AIR LINES DEL 2997650 11575000
DESCARTES SYS GRP INC 3245000
DIGENE CORP 340000
DILLARDS INC CL A 1241500
DIONEX CORP 1020000
DONALDSON INC 1080000
DOW CHEMICAL COMPANY 173000
DRESS BARN INC 5700 650000
ENGELHARD CORP 1946050 5600000
</TABLE>
<PAGE>
PRIMECAP Management Company
FORM 13F
DECEMBER 31, 1999
<TABLE>
<CAPTION>
Value Shares/ Sh/ Put/ Invstmt Other
Name of Issuer Title of class CUSIP (x$1000) Prn Amt Prn Call Dscretn Managers
- ------------------------------ ---------------- --------- -------- -------- --- ---- ------- --------
<S> <C> <C> <C> <C> <C> <C> <C> <C>
ENRON CORP COM 293561882 1953 44000 SH Sole
ERICSSON L M TEL CO ADR CLB COM 294821400 790893 12040230 SH Sole
ERICSSON TEL 4.25% CV ADR COM 294821509 34038 1756800 SH Sole
EVANS & SUTHERLAND COMP. COM 299096107 9608 840000 SH Sole
F M C CORP COM NEW COM 302491303 24570 428700 SH Sole
FARR CO COM 311648109 3247 333000 SH Sole
FDX CORP COM 31304N107 833942 20371100 SH Sole
FLEETWOOD ENTERPRISES COM 339099103 52563 2548500 SH Sole
FORD MTR CO DEL COM 345370100 267 5000 SH Sole
FOX ENTERTAINMENT GRP COM 35138T107 41147 1650000 SH Sole
GAP INC DEL COM 364760108 5003 108750 SH Sole
GC COS INC COM 36155Q109 5175 200000 SH Sole
GENENTECH INC. COM 368710406 13051 97034 SH Sole
GENERAL MOTORS HUGHES COM 370442832 755537 7870180 SH Sole
GENERAL MTRS CORP COM 370442105 160659 2210270 SH Sole
GLOBAL CROSSING COM G3921A100 104037 2080742 SH Sole
GRANITE CONSTR INC COM 387328107 38719 2100000 SH Sole
GUIDANT CORP COM 401698105 420124 8938812 SH Sole
HARCOURT GEN INC COM 41163G101 240325 5970800 SH Sole
HARMONIC LIGHTWAVES COM 413160102 14241 150000 SH Sole
HCC INSURANCE HOLDINGS COM 404132102 14506 1100000 SH Sole
HEWLETT PACKARD CO COM 428236103 530744 4665880 SH Sole
HORACE MANN EDUCATORS CORP NEW COM 440327104 9506 484400 SH Sole
HOUGHTON MIFFLIN CO COM 441560109 13357 316600 SH Sole
ICOS CORP COM 449295104 27641 945000 SH Sole
INPUT/OUTPUT INC COM 457652105 24845 4907645 SH Sole
INTEL CORP COM 458140100 730983 8880580 SH Sole
INTL PAPER CO COM 460146103 22011 390000 SH Sole
</TABLE>
<TABLE>
<CAPTION>
Voting Authority
--------------------------------
Name of Issuer Sole Shared None
- ------------------------------ ---------- -------- --------
<S> <C> <C> <C>
ENRON CORP 4000 40000
ERICSSON L M TEL CO ADR CLB 2840230 9200000
ERICSSON TEL 4.25% CV ADR 1136800 620000
EVANS & SUTHERLAND COMP. 840000
F M C CORP COM NEW 428700
FARR CO 333000
FDX CORP 4645100 15726000
FLEETWOOD ENTERPRISES 1310400 1238100
FORD MTR CO DEL 5000
FOX ENTERTAINMENT GRP 1650000
GAP INC DEL 108750
GC COS INC 200000
GENENTECH INC. 19820 77214
GENERAL MOTORS HUGHES 1380180 6490000
GENERAL MTRS CORP 2210270
GLOBAL CROSSING 430742 1650000
GRANITE CONSTR INC 2100000
GUIDANT CORP 142548 8796264
HARCOURT GEN INC 1078600 4892200
HARMONIC LIGHTWAVES 150000
HCC INSURANCE HOLDINGS 1100000
HEWLETT PACKARD CO 735880 3930000
HORACE MANN EDUCATORS CORP NEW 334400 150000
HOUGHTON MIFFLIN CO 281600 35000
ICOS CORP 945000
INPUT/OUTPUT INC 2084645 2823000
INTEL CORP 2330580 6550000
INTL PAPER CO 390000
</TABLE>
<PAGE>
PRIMECAP Management Company
FORM 13F
DECEMBER 31, 1999
<TABLE>
<CAPTION>
Value Shares/ Sh/ Put/ Invstmt Other
Name of Issuer Title of class CUSIP (x$1000) Prn Amt Prn Call Dscretn Managers
- ------------------------------ ---------------- --------- -------- -------- --- ---- ------- --------
<S> <C> <C> <C> <C> <C> <C> <C> <C>
JEFFERSON PILOT CORP. COM 475070108 1365 20000 SH Sole
JOHNSON & JOHNSON COM 478160104 533072 5716585 SH Sole
KENNAMETAL INC COM 489170100 57613 1713400 SH Sole
LANDEC CORP COM 514766104 7613 1015000 SH Sole
LATTICE SEMICONDUCTOR COM 518415104 52257 1108910 SH Sole
LEUCADIA NATL CORP COM 527288104 9361 404800 SH Sole
LEXMARK INTL GRP INC CL A COM 529771107 162900 1800000 SH Sole
LIBERTY CORP S C COM 530370105 22836 541300 SH Sole
LILLY ELI & CO COM 532457108 46952 706046 SH Sole
LINDSAY MFG CO COM 535555106 5099 279400 SH Sole
LOWES COS INC COM 548661107 50829 850700 SH Sole
LSI LOGIC CORP COM 502161102 77585 1149400 SH Sole
MACDERMID INC COM 554273102 69847 1701000 SH Sole
MANPOWER INC COM 56418H100 128854 3424700 SH Sole
MATTEL INC COM 577081102 7963 606700 SH Sole
MAXIM INTEGRATED PRODS COM 57772K101 9438 200000 SH Sole
MCCLATCHY CO CL A COM 579489105 49366 1141400 SH Sole
MEDTRONIC INC COM 585055106 152035 4172500 SH Sole
MENTOR CORP MINN COM 587188103 1998 77400 SH Sole
METRO-GOLDWYN MAYER COM 591610100 9526 404304 SH Sole
MICRON TECHNOLOGY INC COM 595112103 903094 11559600 SH Sole
MIDWEST EXPRESS HOLDINGS COM 597911106 51446 1614000 SH Sole
MILLIPORE CORP COM 601073109 184250 4770235 SH Sole
MISSISSIPPI CHEM COM NEW COM 605288208 3915 632800 SH Sole
MOLEX INC COM 608554101 11072 195312 SH Sole
MOLEX INC CL A COM 608554200 8838 195312 SH Sole
MONSANTO COM 611662107 258910 7306100 SH Sole
MOTOROLA, INC. COM 620076109 857339 5822335 SH Sole
</TABLE>
<TABLE>
<CAPTION>
Voting Authority
--------------------------------
Name of Issuer Sole Shared None
- ------------------------------ ---------- -------- --------
<S> <C> <C> <C>
JEFFERSON PILOT CORP. 20000
JOHNSON & JOHNSON 488678 5227907
KENNAMETAL INC 453400 1260000
LANDEC CORP 1015000
LATTICE SEMICONDUCTOR 778910 330000
LEUCADIA NATL CORP 404800
LEXMARK INTL GRP INC CL A 400000 1400000
LIBERTY CORP S C 541300
LILLY ELI & CO 159406 546640
LINDSAY MFG CO 121300 158100
LOWES COS INC 7700 843000
LSI LOGIC CORP 421600 727800
MACDERMID INC 1701000
MANPOWER INC 1470300 1954400
MATTEL INC 356700 250000
MAXIM INTEGRATED PRODS 200000
MCCLATCHY CO CL A 141400 1000000
MEDTRONIC INC 707500 3465000
MENTOR CORP MINN 12200 65200
METRO-GOLDWYN MAYER 404304
MICRON TECHNOLOGY INC 1188600 10371000
MIDWEST EXPRESS HOLDINGS 639000 975000
MILLIPORE CORP 1180235 3590000
MISSISSIPPI CHEM COM NEW 632800
MOLEX INC 195312
MOLEX INC CL A 195312
MONSANTO 1530700 5775400
MOTOROLA, INC. 1073485 4748850
</TABLE>
<PAGE>
PRIMECAP Management Company
FORM 13F
DECEMBER 31, 1999
<TABLE>
<CAPTION>
Value Shares/ Sh/ Put/ Invstmt Other
Name of Issuer Title of class CUSIP (x$1000) Prn Amt Prn Call Dscretn Managers
- ------------------------------ ---------------- --------- -------- -------- --- ---- ------- --------
<S> <C> <C> <C> <C> <C> <C> <C> <C>
NEIMAN MARCUS B COM 640204301 39971 1483856 SH Sole
NEIMAN MARCUS GRP CLASS A COM 640204202 112793 4037350 SH Sole
NEWS CORP LTD ADR COM 652487802 120402 3600800 SH Sole
NIKE INC CL B COM 654106103 18140 366000 SH Sole
NOBLE AFFILIATES INC COM 654894104 56567 2638700 SH Sole
NOKIA CORP SPONSORED ADR COM 654902204 76496 400370 SH Sole
NORTEL NETWORKS CORP. COM 656569100 771494 7638555 SH Sole
NOVOSTE CORP COM 67010C100 2310 140000 SH Sole
OM GROUP INC COM 670872100 38460 1116800 SH Sole
OPTIMAL ROBOTICS COM 68388R208 21605 580000 SH Sole
ORTEL CORP COM 68749W102 175631 1463590 SH Sole
PALL CORP COM 696429307 16172 750000 SH Sole
PE CORP.-CELERA GENOMICS COM 69332S201 157895 1059700 SH Sole
PE CORP.-PE BIOSYSTEMS COM 69332S102 398920 3315700 SH Sole
PHARMACIA & UPJOHN COM 716941109 764287 16984150 SH Sole
PHELPS DODGE CORP. COM 717265102 3856 57225 SH Sole
PINNACLE WEST CAP CORP COM 723484101 10131 331500 SH Sole
PITNEY BOWES INC COM 724479100 147174 3046300 SH Sole
PLANTRONICS INC NEW COM 727493108 115073 1608000 SH Sole
POGO PRODUCING CO COM 730448107 76119 3735900 SH Sole
POTASH CORP SASK INC COM 73755L107 121683 2525200 SH Sole
POWERWAVE TECHN COM 739363109 16380 280600 SH Sole
PROTEIN DESIGN LABS COM 74369L103 22260 318000 SH Sole
QUESTAR CORP COM 748356102 9369 624600 SH Sole
RAMBUS INC DEL COM COM 750917106 57322 850000 SH Sole
RAYTHEON COMPANY A COM 755111309 14694 592200 SH Sole
RAYTHEON COMPANY B COM 755111408 12879 484850 SH Sole
RESEARCH IN MOTION COM 760975102 55425 1200000 SH Sole
</TABLE>
<TABLE>
<CAPTION>
Voting Authority
--------------------------------
Name of Issuer Sole Shared None
- ------------------------------ ---------- -------- --------
<S> <C> <C> <C>
NEIMAN MARCUS B 268955 1214901
NEIMAN MARCUS GRP CLASS A 896750 3140600
NEWS CORP LTD ADR 1350800 2250000
NIKE INC CL B 366000
NOBLE AFFILIATES INC 538700 2100000
NOKIA CORP SPONSORED ADR 92370 308000
NORTEL NETWORKS CORP. 1069955 6568600
NOVOSTE CORP 140000
OM GROUP INC 80400 1036400
OPTIMAL ROBOTICS 580000
ORTEL CORP 353590 1110000
PALL CORP 750000
PE CORP.-CELERA GENOMICS 169700 890000
PE CORP.-PE BIOSYSTEMS 675700 2640000
PHARMACIA & UPJOHN 3258950 13725200
PHELPS DODGE CORP. 57225
PINNACLE WEST CAP CORP 331500
PITNEY BOWES INC 646300 2400000
PLANTRONICS INC NEW 1608000
POGO PRODUCING CO 735900 3000000
POTASH CORP SASK INC 525200 2000000
POWERWAVE TECHN 5600 275000
PROTEIN DESIGN LABS 3000 315000
QUESTAR CORP 624600
RAMBUS INC DEL COM 850000
RAYTHEON COMPANY A 592200
RAYTHEON COMPANY B 484850
RESEARCH IN MOTION 1200000
</TABLE>
<PAGE>
PRIMECAP Management Company
FORM 13F
DECEMBER 31, 1999
<TABLE>
<CAPTION>
Value Shares/ Sh/ Put/ Invstmt Other
Name of Issuer Title of class CUSIP (x$1000) Prn Amt Prn Call Dscretn Managers
- ------------------------------ ---------------- --------- -------- -------- --- ---- ------- --------
<S> <C> <C> <C> <C> <C> <C> <C> <C>
REX STORES CORP COM COM 761624105 9800 280000 SH Sole
ROBERT HALF INTL COM 770323103 181358 6349500 SH Sole
ROMAC INTERNATIONAL CORP COM 775835101 2688 200000 SH Sole
RYDER SYS INC COM 783549108 14851 607700 SH Sole
SABRE HOLDINGS CORP COM 785905100 176409 3442120 SH Sole
SCHLUMBERGER LTD COM 806857108 85110 1516440 SH Sole
SEAGRAM LTD COM 811850106 199885 4466700 SH Sole
SIGMA ALDRICH CORP COM 826552101 63131 2100000 SH Sole
SILICON IMAGE COM 82705T102 7006 100000 SH Sole
SKYLINE CORP COM 830830105 3768 160350 SH Sole
SONY CORP ADR NEW COM 835699307 957332 3362010 SH Sole
SOUTHWEST AIRLS CO COM 844741108 234429 14538212 SH Sole
ST PAUL COS INC COM 792860108 51576 1531000 SH Sole
STRATTEC SEC CORP COM 863111100 13277 410100 SH Sole
SYMBOL TECHNOLOGIES COM 871508107 152550 2400000 SH Sole
TEKTRONIX INC COM 879131100 230050 5917690 SH Sole
TELLABS INC COM 879664100 154050 2400000 SH Sole
TEMPLE INLAND INC COM 879868107 121022 1835400 SH Sole
TEXAS INSTRS INC COM 882508104 1294952 13401830 SH Sole
TIFFANY & CO. COM 886547108 21491 240800 SH Sole
TJX COS INC NEW COM 872540109 58870 2880500 SH Sole
TORCHMARK CORP COM 891027104 113980 3921900 SH Sole
TOSCO CORP COM 891490302 35553 1307700 SH Sole
TRANSATLANTIC HLDGS COM 893521104 43910 562500 SH Sole
TRANSOCEAN SEDCO FOREX INC. COM G90078109 9890 293583 SH Sole
UAL CORP COM PAR $0.01 COM 902549500 240487 3100555 SH Sole
UMB FINANCIAL CORP COM 902788108 2492 66000 SH Sole
UNION PAC RES GRP COM 907834105 94138 7383400 SH Sole
</TABLE>
<TABLE>
<CAPTION>
Voting Authority
--------------------------------
Name of Issuer Sole Shared None
- ------------------------------ ---------- -------- --------
<S> <C> <C> <C>
REX STORES CORP COM 280000
ROBERT HALF INTL 1349500 5000000
ROMAC INTERNATIONAL CORP 200000
RYDER SYS INC 607700
SABRE HOLDINGS CORP 502920 2939200
SCHLUMBERGER LTD 722940 793500
SEAGRAM LTD 1366700 3100000
SIGMA ALDRICH CORP 2100000
SILICON IMAGE 100000
SKYLINE CORP 160350
SONY CORP ADR NEW 343010 3019000
SOUTHWEST AIRLS CO 1479962 13058250
ST PAUL COS INC 431000 1100000
STRATTEC SEC CORP 190100 220000
SYMBOL TECHNOLOGIES 2400000
TEKTRONIX INC 1192690 4725000
TELLABS INC 2400000
TEMPLE INLAND INC 535400 1300000
TEXAS INSTRS INC 2798830 10603000
TIFFANY & CO. 24400 216400
TJX COS INC NEW 10500 2870000
TORCHMARK CORP 1321900 2600000
TOSCO CORP 1307700
TRANSATLANTIC HLDGS 562500
TRANSOCEAN SEDCO FOREX INC. 139961 153622
UAL CORP COM PAR $0.01 125555 2975000
UMB FINANCIAL CORP 66000
UNION PAC RES GRP 2583400 4800000
</TABLE>
<PAGE>
PRIMECAP Management Company
FORM 13F
DECEMBER 31, 1999
<TABLE>
<CAPTION>
Value Shares/ Sh/ Put/ Invstmt Other
Name of Issuer Title of class CUSIP (x$1000) Prn Amt Prn Call Dscretn Managers
- ------------------------------ ---------------- --------- -------- -------- --- ---- ------- --------
<S> <C> <C> <C> <C> <C> <C> <C> <C>
UNITED PARCEL SERVICE INC. COM 911312106 27571 399578 SH Sole
VARCO INTL INC COM 922126107 30045 2949200 SH Sole
VULCAN MATERIALS CO. COM 929160109 16175 405000 SH Sole
WELLS FARGO & CO. COM 949746101 2588 64000 SH Sole
WILLAMETTE INDS INC COM 969133107 17265 371800 SH Sole
XILINX INC COM 983919101 218550 4806600 SH Sole
ZENITH NATL INS CORP COM 989390109 9467 459000 SH Sole
REPORT SUMMARY 175 DATA RECORDS 22212387 0 OTHER MANAGERS ON WHOSE BEHALF
</TABLE>
<TABLE>
<CAPTION>
Voting Authority
--------------------------------
Name of Issuer Sole Shared None
- ------------------------------ ---------- -------- --------
<S> <C> <C> <C>
UNITED PARCEL SERVICE INC. 84308 315270
VARCO INTL INC 2113200 836000
VULCAN MATERIALS CO. 405000
WELLS FARGO & CO. 3000 61000
WILLAMETTE INDS INC 371800
XILINX INC 806600 4000000
ZENITH NATL INS CORP 359000 100000
REPORT SUMMARY REPORT IS FILED
</TABLE>
Do not save this screen as a text file. This report automatically creates the
text file 13ftable.txt, which meets all SEC filing requirements. For details
on the location of this text file, see your 705 Report documentation.
