PRIMECAP MANAGEMENT CO/CA/

PASADENA, CA · CIK 763212 · 13F filing filed 2026-08-14

SEC-registered investment adviser since 1983 · corporation

Assets managed$139.3bn
Staff43 · 22 in investment roles
Main clients (by assets)Mutual funds and ETFs 96%, Sovereign wealth funds 2%
Websiteprimecap.com
Form ADV · 2026-07-29SEC adviser record

Legal entityPRIMECAP Management Company (US)

$169.1bn reported value +33.1% vs Q1 2026

324positions

42.6%in top 10

13 new 82 added 178 reduced 9 sold out vs Q1 2026

Holdings, Q2 2026

The small lines show how much was held over the last 4 quarters (adjusted for stock splits).

#	Security	Ticker	Shares	Value	% of portfolio	Change	Shares change
1	MICRON TECHNOLOGY INC COM MU	MU	19,217,236	$22.2bn13.12%	13.12%	Reduced -2.7m	-2,656,968 -12.2%
2	ELI LILLY & CO COM LLY	LLY	9,172,904	$11.0bn6.51%	6.51%	Reduced -50.5k	-50,528 -0.6%
3	INTEL CORP COM INTC	INTC	75,250,958	$10.5bn6.21%	6.21%	Reduced -511.0k	-511,010 -0.7%
4	KLA CORP COM NEW KLAC	KLAC	20,536,730	$6.2bn3.66%	3.66%	Reduced -3.8m	-3,839,740 -15.8%
5	ALPHABET INC CAP STK CL A GOOGL	GOOGL	14,859,769	$5.3bn3.14%	3.14%	Reduced -127.7k	-127,690 -0.8%
6	FLEX LTD ORD FLEX	FLEX	23,358,875	$3.8bn2.24%	2.24%	Reduced -2.0m	-2,024,573 -8.0%
7	ASTRAZENECA PLC ORD AZN	AZN	18,095,178	$3.4bn2.03%	2.03%	Reduced -118.5k	-118,530 -0.7%
8	NVIDIA CORPORATION COM NVDA	NVDA	17,079,180	$3.4bn2.02%	2.02%	Reduced -109.0k	-109,050 -0.6%
9	BIOGEN INC COM BIIB	BIIB	15,154,606	$3.3bn1.94%	1.94%	Added +397.0k	+396,999 2.7%
10	AMAZON COM INC COM AMZN	AMZN	11,962,188	$2.9bn1.69%	1.69%	Reduced -144.8k	-144,850 -1.2%
11	MICROSOFT CORP COM MSFT	MSFT	7,140,870	$2.7bn1.58%	1.58%	Reduced -123.7k	-123,690 -1.7%
12	TESLA INC COM TSLA	TSLA	6,103,030	$2.6bn1.52%	1.52%	Reduced -22.5k	-22,490 -0.4%
13	FEDEX CORP COM FDX	FDX	8,156,799	$2.6bn1.51%	1.51%	Reduced -146.2k	-146,211 -1.8%
14	TEXAS INSTRS INC COM TXN	TXN	8,514,989	$2.5bn1.50%	1.50%	Reduced -1.1m	-1,139,777 -11.8%
15	SOUTHWEST AIRLS CO COM LUV	LUV	48,797,725	$2.5bn1.48%	1.48%	Added +1.7m	+1,728,230 3.7%
16	AMGEN INC COM AMGN	AMGN	6,756,962	$2.4bn1.45%	1.45%	Reduced -2.1m	-2,117,167 -23.9%
17	SCHWAB CHARLES CORP COM SCHW	SCHW	25,120,895	$2.3bn1.37%	1.37%	Added +1.7m	+1,678,980 7.2%
18	UNITED AIRLS HLDGS INC COM UAL	UAL	16,461,630	$2.2bn1.32%	1.32%	Added +711.0k	+711,020 4.5%
19	BOSTON SCIENTIFIC CORP COM BSX	BSX	50,520,914	$2.2bn1.28%	1.28%	Added +18.0m	+17,991,140 55.3%
20	ROSS STORES INC COM ROST	ROST	9,104,980	$1.9bn1.15%	1.15%	Reduced -65.0k	-65,050 -0.7%
21	ALPHABET INC CAP STK CL C GOOG	GOOG	5,399,060	$1.9bn1.13%	1.13%	Reduced -321.9k	-321,850 -5.6%
22	ALIBABA GROUP HLDG LTD SPONSORED ADS BABA	BABA	18,611,306	$1.8bn1.06%	1.06%	Reduced -111.0k	-111,010 -0.6%
23	DELTA AIR LINES INC DEL COM NEW DAL	DAL	17,521,167	$1.6bn0.97%	0.97%	Reduced -27.4k	-27,400 -0.2%
24	VISA INC COM CL A V	V	4,268,491	$1.5bn0.87%	0.87%	Added +208.3k	+208,290 5.1%
25	BRISTOL-MYERS SQUIBB CO COM BMY	BMY	24,923,900	$1.4bn0.85%	0.85%	Reduced -61.2k	-61,249 -0.2%
26	TJX COS INC NEW COM TJX	TJX	9,476,020	$1.4bn0.85%	0.85%	Reduced -112.9k	-112,900 -1.2%
27	BEIGENE LTD SPONSORED ADR ONC	ONC	5,007,931	$1.4bn0.84%	0.84%	Added +32.8k	+32,750 0.7%
28	RAYMOND JAMES FINL INC COM RJF	RJF	9,242,552	$1.4bn0.83%	0.83%	Reduced -104.6k	-104,620 -1.1%
29	NETAPP INC COM NTAP	NTAP	9,016,690	$1.4bn0.83%	0.83%	Reduced -40.8k	-40,765 -0.5%
30	GSK PLC SPONSORED ADR GSK	GSK	25,182,068	$1.3bn0.78%	0.78%	Reduced -22.5k	-22,470 -0.1%
31	AMERICAN AIRLS GROUP INC COM AAL	AAL	70,732,954	$1.3bn0.76%	0.76%	Added +21.7m	+21,743,000 44.4%
32	BAIDU INC SPON ADR REP A BIDU	BIDU	11,010,100	$1.3bn0.74%	0.74%	Reduced -46.7k	-46,700 -0.4%
33	ANALOG DEVICES INC COM ADI	ADI	3,128,329	$1.2bn0.73%	0.73%	Reduced -7.8k	-7,760 -0.2%
34	JABIL INC COM JBL	JBL	3,167,120	$1.2bn0.72%	0.72%	Reduced -114.0k	-114,049 -3.5%
35	CONOCOPHILLIPS COM COP	COP	11,588,365	$1.2bn0.71%	0.71%	Added +9.1k	+9,100 0.1%
36	SONY GROUP CORP SPONSORED ADR SONY	SONY	59,603,230	$1.2bn0.71%	0.71%	Added +1.1m	+1,072,400 1.8%
37	ELANCO ANIMAL HEALTH INC COM ELAN	ELAN	45,445,012	$1.1bn0.66%	0.66%	Reduced -395.9k	-395,944 -0.9%
38	JPMORGAN CHASE & CO COM JPM	JPM	3,382,627	$1.1bn0.65%	0.65%	Reduced -20.9k	-20,900 -0.6%
39	ADOBE INC COM ADBE	ADBE	5,227,139	$1.1bn0.63%	0.63%	Added +496.3k	+496,293 10.5%
40	NORTHERN TR CORP COM NTRS	NTRS	6,100,742	$1.1bn0.63%	0.63%	Reduced -448.3k	-448,295 -6.8%
41	CORNING INC COM GLW	GLW	4,131,872	$1.1bn0.62%	0.62%	Reduced -2.9k	-2,900 -0.1%
42	NOVARTIS AG SPONSORED ADR NVS	NVS	6,592,124	$1.0bn0.61%	0.61%	Reduced -975.2k	-975,230 -12.9%
43	THERMO FISHER SCIENTIFIC INC COM TMO	TMO	1,982,271	$993.8m0.59%	0.59%	Reduced -260	-260 -0.0%
44	CATERPILLAR INC COM CAT	CAT	871,700	$928.3m0.55%	0.55%	Reduced -560	-560 -0.1%
45	MARVELL TECHNOLOGY INC COM MRVL	MRVL	2,757,995	$821.6m0.49%	0.49%	Reduced -216.7k	-216,710 -7.3%
46	BIOMARIN PHARMACEUTICAL INC COM BMRN	BMRN	14,190,183	$812.0m0.48%	0.48%	Reduced -3.8k	-3,822 -0.0%
47	NEXTRACKER INC CLASS A COM NXT	NXT	6,688,767	$796.9m0.47%	0.47%	Reduced -72.1k	-72,080 -1.1%
48	ORACLE CORP COM ORCL	ORCL	5,386,230	$789.4m0.47%	0.47%	Reduced -287.9k	-287,900 -5.1%
49	HEWLETT PACKARD ENTERPRISE C COM HPE	HPE	17,140,875	$773.2m0.46%	0.46%	Reduced -88.2k	-88,205 -0.5%
50	APPLIED MATLS INC COM AMAT	AMAT	1,042,926	$754.0m0.45%	0.45%	Reduced -131.2k	-131,200 -11.2%
51	IDEX CORP COM IEX	IEX	3,300,072	$749.0m0.44%	0.44%	Reduced -2.9k	-2,865 -0.1%
52	ASML HOLDING N V N Y REGISTRY SHS ASML	ASML	351,576	$699.4m0.41%	0.41%	Reduced -1.5k	-1,500 -0.4%
53	DISNEY WALT CO COM DIS	DIS	7,020,957	$675.8m0.40%	0.40%	Added +785.8k	+785,830 12.6%
54	ROYAL CARIBBEAN GROUP COM RCL	RCL	2,109,421	$669.8m0.40%	0.40%	Reduced -237.5k	-237,500 -10.1%
55	XOMETRY INC CLASS A COM XMTR	XMTR	6,636,057	$640.5m0.38%	0.38%	Added +140.6k	+140,560 2.2%
56	ILLUMINA INC COM ILMN	ILMN	3,514,649	$618.0m0.37%	0.37%	Added +1.4m	+1,447,350 70.0%
57	AECOM COM ACM	ACM	8,787,043	$613.3m0.36%	0.36%	Added +140.0k	+139,970 1.6%
58	FEDEX FGHT HLDG CO INC COMMON STOCK FDXF	FDXF	4,048,660	$611.3m0.36%	0.36%	New
59	ADVANCED MICRO DEVICES INC COM AMD	AMD	1,047,730	$608.6m0.36%	0.36%	Reduced -1.8k	-1,790 -0.2%
60	JACOBS SOLUTIONS INC COM J	J	4,565,799	$575.3m0.34%	0.34%	Added +50.3k	+50,320 1.1%
61	CISCO SYS INC COM CSCO	CSCO	4,838,460	$568.3m0.34%	0.34%	Reduced -700	-700 -0.0%
62	ENTEGRIS INC COM ENTG	ENTG	3,125,433	$562.1m0.33%	0.33%	Reduced -17.4k	-17,400 -0.6%
63	WELLS FARGO CO NEW COM WFC	WFC	6,712,022	$554.7m0.33%	0.33%	Reduced -1.0m	-1,011,080 -13.1%
64	TRANSDIGM GROUP INC COM TDG	TDG	410,217	$546.4m0.32%	0.32%	Unchanged
65	HP INC COM HPQ	HPQ	24,885,325	$546.0m0.32%	0.32%	Added +3.4m	+3,415,700 15.9%
66	APPLE INC COM AAPL	AAPL	1,760,880	$509.5m0.30%	0.30%	Unchanged
67	TELEFONAKTIEBOLAGET LM ERICS ADR B SEK 10 ERIC	ERIC	41,613,613	$464.0m0.27%	0.27%	Added +4.1m	+4,109,600 11.0%
68	LINDE PLC SHS LIN	LIN	886,920	$460.3m0.27%	0.27%	Reduced -1.6k	-1,600 -0.2%
69	DOLLAR TREE INC COM DLTR	DLTR	3,768,875	$455.8m0.27%	0.27%	Added +40.0k	+40,000 1.1%
70	FAIR ISAAC CORP COM FICO	FICO	362,835	$433.5m0.26%	0.26%	Added +73.8k	+73,788 25.5%
71	GLAUKOS CORP COM GKOS	GKOS	3,040,705	$425.0m0.25%	0.25%	Reduced -329.9k	-329,923 -9.8%
72	PAYPAL HLDGS INC COM PYPL	PYPL	9,775,170	$422.1m0.25%	0.25%	Reduced -251.3k	-251,320 -2.5%
73	CME GROUP INC COM CME	CME	1,904,643	$420.6m0.25%	0.25%	Added +85.9k	+85,925 4.7%
74	MATTEL INC COM MAT	MAT	29,505,735	$409.5m0.24%	0.24%	Reduced -192.2k	-192,189 -0.7%
75	US FOODS HLDG CORP COM USFD	USFD	3,980,409	$407.0m0.24%	0.24%	Added +34.1k	+34,099 0.9%
76	SYNOPSYS INC COM SNPS	SNPS	895,350	$399.4m0.24%	0.24%	Added +73.0k	+72,950 8.9%
77	META PLATFORMS INC CL A META	META	708,290	$399.0m0.24%	0.24%	Reduced -66.0k	-65,950 -8.5%
78	MARKETAXESS HLDGS INC COM MKTX	MKTX	3,504,905	$397.8m0.24%	0.24%	Added +157.8k	+157,780 4.7%
79	CURTISS WRIGHT CORP COM CW	CW	514,815	$390.1m0.23%	0.23%	Reduced -22.0k	-22,025 -4.1%
80	BOOZ ALLEN HAMILTON HLDG COR CL A BAH	BAH	6,397,644	$388.1m0.23%	0.23%	Added +1.6m	+1,567,846 32.5%
81	CHEVRON CORP NEW COM CVX	CVX	2,285,458	$378.8m0.22%	0.22%	Reduced -6.1k	-6,119 -0.3%
82	BANK NEW YORK MELLON CORP COM BNY	BNY	2,603,540	$376.5m0.22%	0.22%	Added +68.9k	+68,900 2.7%
83	DANAHER CORPORATION COM DHR	DHR	1,889,070	$359.8m0.21%	0.21%	Added +332.1k	+332,100 21.3%
84	ALBEMARLE CORP COM ALB	ALB	2,652,009	$358.1m0.21%	0.21%	Reduced -12.7k	-12,700 -0.5%
85	MARSH & MCLENNAN COS INC COM MRSH	MRSH	2,145,025	$357.5m0.21%	0.21%	Added +1.4m	+1,427,525 199.0%
86	RHYTHM PHARMACEUTICALS INC COM RYTM	RYTM	3,168,853	$351.8m0.21%	0.21%	Reduced -248.7k	-248,656 -7.3%
87	BIONTECH SE SPONSORED ADS BNTX	BNTX	3,772,031	$351.0m0.21%	0.21%	Reduced -21.7k	-21,680 -0.6%
88	PALO ALTO NETWORKS INC COM PANW	PANW	1,019,890	$347.8m0.21%	0.21%	Reduced -14.3k	-14,276 -1.4%
89	LIVANOVA PLC SHS LIVN	LIVN	4,168,377	$342.8m0.20%	0.20%	Reduced -38.7k	-38,675 -0.9%
90	NETFLIX INC COM NFLX	NFLX	4,790,465	$342.0m0.20%	0.20%	Added +378.7k	+378,675 8.6%
91	MASTERCARD INCORPORATED CL A MA	MA	654,691	$336.2m0.20%	0.20%	Added +72.5k	+72,520 12.5%
92	WESTERN DIGITAL CORP COM WDC	WDC	516,440	$329.9m0.20%	0.20%	Reduced -60.8k	-60,770 -10.5%
93	ZIMMER BIOMET HOLDINGS INC COM ZBH	ZBH	3,816,680	$328.6m0.19%	0.19%	Reduced -90.5k	-90,470 -2.3%
94	CITIGROUP INC COM NEW C	C	2,333,600	$326.6m0.19%	0.19%	Reduced -56.9k	-56,900 -2.4%
95	NORFOLK SOUTHN CORP COM NSC	NSC	1,032,910	$324.9m0.19%	0.19%	Reduced -500	-500 -0.1%
96	SYSCO CORP COM SYY	SYY	3,750,929	$313.5m0.19%	0.19%	Added +49.1k	+49,091 1.3%
97	EDWARDS LIFESCIENCES CORP COM EW	EW	3,408,291	$308.3m0.18%	0.18%	Reduced -14.5k	-14,500 -0.4%
98	PERFORMANCE FOOD GROUP CO COM PFGC	PFGC	2,728,898	$305.1m0.18%	0.18%	Added +21.1k	+21,100 0.8%
99	INTUIT COM INTU	INTU	1,110,067	$289.7m0.17%	0.17%	Added +38.8k	+38,750 3.6%
100	MONGODB INC CL A MDB	MDB	846,004	$284.2m0.17%	0.17%	Added +3.3k	+3,275 0.4%

Sold out since Q1 2026

Security	Ticker	Shares held before	Value then
CARNIVAL CORP		5,363,703	$138.8m5.4m shares
HONEYWELL INTL INC		244,100	$110.3m244.1k shares
DUPONT DE NEMOURS INC DWDP	DWDP	665,720	$91.5m665.7k shares
COTERRA ENERGY INC CTRA	CTRA	2,289,750	$80.5m2.3m shares
FIFTH THIRD BANCORP FITB	FITB	196,260	$9.1m196.3k shares
AMICUS THERAPEUTICS INC FOLD	FOLD	585,400	$8.5m585.4k shares
ONESTREAM INC OS	OS	19,500	$468.0k19.5k shares
HEALTH CATALYST INC HCAT	HCAT	340,418	$432.3k340.4k shares
MEDTRONIC PLC MDT	MDT	2,440	$211.4k2.4k shares

Stakes above 5%

Companies where this manager has reported owning more than 5% of a class of shares, on Schedule 13D (may seek influence) or 13G (passive): its latest filing for each, from 19 Dec 2024 on.

Company	Ticker	Stake	Change	Schedule	Last filed
XENCOR INC XNCR · 13G · filed 2025-08-14	XNCR	14.8%≈ $169.5m		13G	2025-08-14
XOMETRY INC XMTR · 13G · filed 2026-05-13	XMTR	12.9%≈ $626.9m	+1.5 pts	13G	2026-05-13
PULMONX CORP LUNG · 13G · filed 2025-11-13	LUNG	12.2%≈ $6.4m	-1.4 pts	13G	2025-11-13
AMERICAN AIRLS GROUP INC AAL · 13G · filed 2026-06-05	AAL	10.5%≈ $1.3bn	+2.9 pts	13G	2026-06-05
MATTEL INC MAT · 13G · filed 2025-08-14	MAT	10.3%≈ $448.9m		13G	2025-08-14
BIOGEN INC BIIB · 13G · filed 2025-11-13	BIIB	10.2%≈ $3.2bn		13G	2025-11-13
SOUTHWEST AIRLS CO LUV · 13G · filed 2026-10-05	LUV	10.0%≈ $2.5bn	+0.4 pts	13G	2026-10-05
MARKETAXESS HLDGS INC MKTX · 13G · filed 2026-08-06	MKTX	9.9%≈ $397.8m	+1.3 pts	13G	2026-08-06
ELANCO ANIMAL HEALTH INC ELAN · 13G · filed 2026-05-13	ELAN	9.2%≈ $1.1bn		13G	2026-05-13
BIOMARIN PHARMACEUTICAL INC BMRN · 13G · filed 2025-08-14	BMRN	8.2%≈ $903.8m		13G	2025-08-14
LIVANOVA PLC LIVN · 13G · filed 2026-02-12	LIVN	7.7%≈ $347.4m	-1.0 pts	13G	2026-02-12
IMMUNOCORE HLDGS PLC IMCR · 13G · filed 2025-08-14	IMCR	7.5%	+2.2 pts	13G	2025-08-14
AECOM ACM · 13G · filed 2025-08-14	ACM	7.2%≈ $668.7m	-1.3 pts	13G	2025-08-14
FLEX LTD FLEX · 13G · filed 2026-08-06	FLEX	6.4%≈ $3.8bn	-1.5 pts	13G	2026-08-06
GLAUKOS CORP GKOS · 13G · filed 2026-02-11	GKOS	5.9%≈ $472.0m	new	13G	2026-02-11
WHIRLPOOL CORP WHR · 13G · filed 2026-05-13	WHR	5.8%≈ $147.7m	-1.0 pts	13G	2026-05-13
BOOZ ALLEN HAMILTON HLDG COR BAH · 13G · filed 2026-08-06	BAH	5.3%≈ $388.1m	new	13G	2026-08-06
RHYTHM PHARMACEUTICALS INC RYTM · 13G · filed 2026-02-12	RYTM	5.2%≈ $386.2m	-1.2 pts	13G	2026-02-12
GRAIL INC GRAL · 13G · filed 2026-08-06	GRAL	5.1%≈ $170.4m	+0.4 pts	13G	2026-08-06
AMENTUM HOLDINGS INC AMTM · 13G · filed 2026-08-06	AMTM	5.0%≈ $253.9m	new	13G	2026-08-06