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Built from publicly disclosed institutional and insider activity. Informational purposes only - not investment advice.OpenStocks · v0.1
Logos by elbstream.com
  1. Home/
  2. Super Investors/
  3. PRIMECAP Management
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PRIMECAP Management

Share
  • Asset Manager · CIK 0000763212
  • Mega-Fund

PRIMECAP Management, an asset manager overseeing $132.11B in disclosed equity holdings (SEC CIK 0000763212). The latest portfolio (2025Q4) discloses 319 positions across 11 sectors, with the largest positions in LLY, MU and GOOGL. On a mark-to-market basis the tracked portfolio has returned 41.7% since 2024Q1. OpenStocks tracks 8 consecutive quarterly snapshots for this manager — every position change, new entry, and exit is logged below.

Track PRIMECAP's filingsView holdings↓
Portfolio
$132.11B
Positions
319
Quarter
2025Q4
Filings tracked
8
Since filing+41.7%Full performance →
Quarter
2025Q42025Q32025Q22025Q12024Q42024Q32024Q22024Q1

Holdings

Sorted by value · 2025Q4
1 / 5
75 of 319
1
L
LLYLILLY ELI & CO
Healthcare·Drug Manufacturers - General
7.54%
of portfolio
Number of shares
9,265,782 sh
Holdings current value
$9.96B
Avg closing price
$777.96
+18.0%
Last action
Trimmed 14.2%
2025Q4
Current $917.65
2
M
MUMICRON TECHNOLOGY INC
Technology·Semiconductors
5.36%
of portfolio
Number of shares
24,794,936 sh
Holdings current value
$7.08B
Avg closing price
$117.81
+308.9%
Last action
Trimmed 16.4%
2025Q4
Current $481.72
3
G
GOOGLALPHABET INC
Communication Services·Internet Content & Information
3.58%
of portfolio
Number of shares
15,128,289 sh
Holdings current value
$4.74B
Avg closing price
$151.47
+123.7%
Last action
Trimmed 4.1%
2025Q4
Current $338.89
4
M
MSFTMICROSOFT CORP
Technology·Software - Infrastructure
2.67%
of portfolio
Number of shares
7,287,520 sh
Holdings current value
$3.52B
Avg closing price
$420.96
-1.2%
Last action
Trimmed 13.1%
2025Q4
Current $415.75
5
K
KLACKLA CORP
Technology·Semiconductor Equipment & Materials
2.65%
of portfolio
Number of shares
2,875,962 sh
Holdings current value
$3.49B
Avg closing price
$698.57
+159.9%
Last action
Trimmed 18.6%
2025Q4
Current $1815
6
A
AZNASTRAZENECA PLCADR
Healthcare·Drug Manufacturers - General
2.57%
of portfolio
Number of shares
36,915,261 sh
Holdings current value
$3.39B
Avg closing price
$67.78
+183.7%
Last action
Trimmed 7.4%
2025Q4
Current $192.30
7
N
NVDANVIDIA CORPORATION
Technology·Semiconductors
2.43%
of portfolio
Number of shares
17,227,520 sh
Holdings current value
$3.21B
Avg closing price
$206.69
-3.4%
Last action
Trimmed 8.2%
2025Q4
Current $199.64
8
B
BSXBOSTON SCIENTIFIC CORP
Healthcare·Medical Devices
2.24%
of portfolio
Number of shares
31,096,184 sh
Holdings current value
$2.97B
Avg closing price
$68.49
-4.1%
Last action
Trimmed 6.1%
2025Q4
Current $65.69
9
A
AMGNAMGEN INC
Healthcare·Drug Manufacturers - General
2.21%
of portfolio
Number of shares
8,904,979 sh
Holdings current value
$2.91B
Avg closing price
$284.32
+22.6%
Last action
Trimmed 8.3%
2025Q4
Current $348.62
10
T
TSLATESLA INC
Consumer Cyclical·Auto Manufacturers
2.15%
of portfolio
Number of shares
6,317,420 sh
Holdings current value
$2.84B
Avg closing price
$175.79
+112.6%
Last action
Trimmed 4.6%
2025Q4
Current $373.72
11
A
AMZNAMAZON COM INC
Consumer Cyclical·Internet Retail
2.14%
of portfolio
Number of shares
12,256,188 sh
Holdings current value
$2.83B
Avg closing price
$206.84
+23.3%
Last action
Added 14.4%
2025Q4
Current $255.08
12
I
INTCINTEL CORP
Technology·Semiconductors
2.13%
of portfolio
Number of shares
76,132,268 sh
Holdings current value
$2.81B
Avg closing price
$43.00
+55.3%
Last action
Trimmed 4.1%
2025Q4
Current $66.78
13
B
BABAALIBABA GROUP HLDG LTDADR
Consumer Cyclical·Internet Retail
2.11%
of portfolio
Number of shares
18,977,436 sh
Holdings current value
$2.78B
Avg closing price
$72.71
+81.1%
Last action
Trimmed 5.1%
2025Q4
Current $131.70
14
B
BIIBBIOGEN INC
Healthcare·Drug Manufacturers - General
1.97%
of portfolio
Number of shares
14,757,997 sh
Holdings current value
$2.60B
Avg closing price
$215.75
-12.9%
Last action
Trimmed 1.3%
2025Q4
Current $187.88
15
F
FDXFEDEX CORP
Industrials·Integrated Freight & Logistics
1.86%
of portfolio
Number of shares
8,512,671 sh
Holdings current value
$2.46B
Avg closing price
$289.74
+35.5%
Last action
Trimmed 9.8%
2025Q4
Current $392.69
16
S
SCHWSCHWAB CHARLES CORP
Financial Services·Capital Markets
1.76%
of portfolio
Number of shares
23,276,071 sh
Holdings current value
$2.33B
Avg closing price
$83.75
+6.2%
Last action
Added 9.7%
2025Q4
Current $88.92
17
L
LUVSOUTHWEST AIRLS CO
Industrials·Airlines
1.48%
of portfolio
Number of shares
47,392,095 sh
Holdings current value
$1.96B
Avg closing price
$29.26
+29.0%
Last action
Trimmed 1.3%
2025Q4
Current $37.75
18
G
GOOGALPHABET INC
Communication Services·Internet Content & Information
1.37%
of portfolio
Number of shares
5,762,640 sh
Holdings current value
$1.81B
Avg closing price
$152.26
+121.8%
Last action
Trimmed 5.9%
2025Q4
Current $337.75
19
U
UALUNITED AIRLS HLDGS INC
Industrials·Airlines
1.35%
of portfolio
Number of shares
15,978,490 sh
Holdings current value
$1.79B
Avg closing price
$47.88
+90.6%
Last action
Trimmed 11.2%
2025Q4
Current $91.25
20
T
TXNTEXAS INSTRS INC
Technology·Semiconductors
1.32%
of portfolio
Number of shares
10,084,686 sh
Holdings current value
$1.75B
Avg closing price
$174.21
+62.0%
Last action
Trimmed 10.2%
2025Q4
Current $282.23
21
R
ROSTROSS STORES INC
Consumer Cyclical·Apparel Retail
1.26%
of portfolio
Number of shares
9,207,200 sh
Holdings current value
$1.66B
Avg closing price
$146.66
+54.7%
Last action
Trimmed 7.5%
2025Q4
Current $226.92
22
Y
Y2573F102FLEX LTD
1.22%
of portfolio
Number of shares
26,702,091 sh
Holdings current value
$1.61B
Avg closing price
$28.61
Last action
Trimmed 9.8%
2025Q4
Current —
23
O
ONCBEIGENE LTDADR
Healthcare·Biotechnology
1.15%
of portfolio
Number of shares
4,980,581 sh
Holdings current value
$1.51B
Avg closing price
$157.63
+90.2%
Last action
Trimmed 2.0%
2025Q4
Current $299.81
24
R
RJFRAYMOND JAMES FINL INC
Financial Services·Asset Management
1.14%
of portfolio
Number of shares
9,342,072 sh
Holdings current value
$1.50B
Avg closing price
$129.16
+18.8%
Last action
Trimmed 3.2%
2025Q4
Current $153.41
25
T
TJXTJX COS INC NEW
Consumer Cyclical·Apparel Retail
1.13%
of portfolio
Number of shares
9,739,320 sh
Holdings current value
$1.50B
Avg closing price
$101.42
+56.1%
Last action
Trimmed 7.5%
2025Q4
Current $158.35
26
S
SONYSONY GROUP CORPORATIONADR
Technology·Consumer Electronics
1.13%
of portfolio
Number of shares
58,301,430 sh
Holdings current value
$1.49B
Avg closing price
$34.63
-40.8%
Last action
Trimmed 9.5%
2025Q4
Current $20.49
27
B
BIDUBAIDU INCADR
Communication Services·Internet Content & Information
1.10%
of portfolio
Number of shares
11,103,600 sh
Holdings current value
$1.45B
Avg closing price
$102.32
+18.8%
Last action
Trimmed 8.3%
2025Q4
Current $121.53
28
V
VVISA INC
Financial Services·Credit Services
1.06%
of portfolio
Number of shares
4,008,951 sh
Holdings current value
$1.41B
Avg closing price
$285.77
+8.1%
Last action
Trimmed 1.4%
2025Q4
Current $308.88
29
B
BMYBRISTOL-MYERS SQUIBB CO
Healthcare·Drug Manufacturers - General
1.02%
of portfolio
Number of shares
24,875,550 sh
Holdings current value
$1.34B
Avg closing price
$54.14
+9.0%
Last action
Added 12.6%
2025Q4
Current $59.02
30
A
ADBEADOBE SYSTEMS INCORPORATED
Technology·Software - Application
0.97%
of portfolio
Number of shares
3,676,206 sh
Holdings current value
$1.29B
Avg closing price
$504.60
-52.6%
Last action
Trimmed 4.7%
2025Q4
Current $238.98
31
G
GSKGSK PLCADR
Healthcare·Drug Manufacturers - General
0.93%
of portfolio
Number of shares
25,130,160 sh
Holdings current value
$1.23B
Avg closing price
$38.78
+43.5%
Last action
Trimmed 2.5%
2025Q4
Current $55.63
32
D
DALDELTA AIR LINES INC DEL
Industrials·Airlines
0.92%
of portfolio
Number of shares
17,594,127 sh
Holdings current value
$1.22B
Avg closing price
$47.87
+42.8%
Last action
Trimmed 3.8%
2025Q4
Current $68.37
33
T
TMOTHERMO FISHER SCIENTIFIC INC
Healthcare·Diagnostics & Research
0.90%
of portfolio
Number of shares
2,057,292 sh
Holdings current value
$1.19B
Avg closing price
$574.72
-18.8%
Last action
Trimmed 10.7%
2025Q4
Current $466.70
34
O
ORCLORACLE CORP
Technology·Software - Infrastructure
0.89%
of portfolio
Number of shares
6,031,740 sh
Holdings current value
$1.18B
Avg closing price
$128.98
+36.7%
Last action
Trimmed 20.0%
2025Q4
Current $176.28
35
J
JPMJPMORGAN CHASE & CO
Financial Services·Banks - Diversified
0.88%
of portfolio
Number of shares
3,606,887 sh
Holdings current value
$1.16B
Avg closing price
$200.57
+55.4%
Last action
Trimmed 6.0%
2025Q4
Current $311.69
36
C
COPCONOCOPHILLIPS
Energy·Oil & Gas E&P
0.82%
of portfolio
Number of shares
11,577,465 sh
Holdings current value
$1.08B
Avg closing price
$102.75
+21.0%
Last action
Added 11.8%
2025Q4
Current $124.37
37
E
ELANELANCO ANIMAL HEALTH INC
Healthcare·Drug Manufacturers - Specialty & Generic
0.79%
of portfolio
Number of shares
46,214,088 sh
Holdings current value
$1.05B
Avg closing price
$16.22
+38.0%
Last action
Trimmed 7.5%
2025Q4
Current $22.39
38
N
NVSNOVARTIS AGADR
Healthcare·Drug Manufacturers - General
0.79%
of portfolio
Number of shares
7,579,274 sh
Holdings current value
$1.04B
Avg closing price
$96.77
+52.4%
Last action
Trimmed 18.9%
2025Q4
Current $147.48
39
N
NTAPNETAPP INC
Technology·Software - Infrastructure
0.74%
of portfolio
Number of shares
9,068,055 sh
Holdings current value
$971.10M
Avg closing price
$104.97
+3.3%
Last action
Trimmed 5.8%
2025Q4
Current $108.40
40
N
NTRSNORTHERN TR CORP
Financial Services·Asset Management
0.68%
of portfolio
Number of shares
6,607,717 sh
Holdings current value
$902.55M
Avg closing price
$94.95
+74.2%
Last action
Trimmed 12.4%
2025Q4
Current $165.39
41
B
BMRNBIOMARIN PHARMACEUTICAL INC
Healthcare·Biotechnology
0.65%
of portfolio
Number of shares
14,549,314 sh
Holdings current value
$864.67M
Avg closing price
$87.25
-38.1%
Last action
Trimmed 4.5%
2025Q4
Current $53.98
42
A
ADIANALOG DEVICES INC
Technology·Semiconductors
0.64%
of portfolio
Number of shares
3,141,640 sh
Holdings current value
$852.01M
Avg closing price
$197.79
+104.2%
Last action
Trimmed 4.2%
2025Q4
Current $403.88
43
A
ACMAECOM
Industrials·Engineering & Construction
0.63%
of portfolio
Number of shares
8,667,283 sh
Holdings current value
$826.25M
Avg closing price
$98.08
-18.0%
Last action
Trimmed 2.4%
2025Q4
Current $80.46
44
W
WFCWELLS FARGO CO NEW
Financial Services·Banks - Diversified
0.59%
of portfolio
Number of shares
8,360,272 sh
Holdings current value
$779.18M
Avg closing price
$57.96
+38.9%
Last action
Trimmed 44.0%
2025Q4
Current $80.51
45
J
JBLJABIL INC
Technology·Electronic Components
0.58%
of portfolio
Number of shares
3,343,670 sh
Holdings current value
$762.42M
Avg closing price
$134.15
+152.4%
Last action
Added 0.4%
2025Q4
Current $338.53
46
A
AALAMERICAN AIRLS GROUP INC
Industrials·Airlines
0.57%
of portfolio
Number of shares
49,002,554 sh
Holdings current value
$751.21M
Avg closing price
$14.43
-18.4%
Last action
Trimmed 1.3%
2025Q4
Current $11.78
47
D
DISDISNEY WALT CO
Communication Services·Entertainment
0.54%
of portfolio
Number of shares
6,236,627 sh
Holdings current value
$709.54M
Avg closing price
$122.40
-15.3%
Last action
Trimmed 0.2%
2025Q4
Current $103.65
48
I
INTUINTUIT
Technology·Software - Application
0.53%
of portfolio
Number of shares
1,056,337 sh
Holdings current value
$699.74M
Avg closing price
$650.00
-41.0%
Last action
Trimmed 5.8%
2025Q4
Current $383.30
49
V
V7780T103ROYAL CARIBBEAN GROUP
0.51%
of portfolio
Number of shares
2,410,521 sh
Holdings current value
$672.34M
Avg closing price
$139.01
Last action
Trimmed 12.6%
2025Q4
Current —
50
N
NXTNEXTRACKER INC
Technology·Solar
0.46%
of portfolio
Number of shares
6,951,597 sh
Holdings current value
$605.55M
Avg closing price
$56.25
+121.1%
Last action
Trimmed 6.8%
2025Q4
Current $124.36
51
J
JJACOBS SOLUTIONS INC
Industrials·Engineering & Construction
0.45%
of portfolio
Number of shares
4,525,959 sh
Holdings current value
$599.51M
Avg closing price
$153.28
-16.8%
Last action
Trimmed 1.4%
2025Q4
Current $127.58
52
M
MATMATTEL INC
Consumer Cyclical·Leisure
0.45%
of portfolio
Number of shares
29,804,075 sh
Holdings current value
$591.31M
Avg closing price
$19.81
-25.5%
Last action
Trimmed 4.9%
2025Q4
Current $14.76
53
M
MKTXMARKETAXESS HLDGS INC
Financial Services·Capital Markets
0.44%
of portfolio
Number of shares
3,175,425 sh
Holdings current value
$575.55M
Avg closing price
$194.29
-15.8%
Last action
Added 42.4%
2025Q4
Current $163.61
54
I
IEXIDEX CORP
Industrials·Specialty Industrial Machinery
0.43%
of portfolio
Number of shares
3,226,787 sh
Holdings current value
$574.17M
Avg closing price
$177.57
+16.4%
Last action
Added 86.5%
2025Q4
Current $206.64
55
T
TDGTRANSDIGM GROUP INC
Industrials·Aerospace & Defense
0.41%
of portfolio
Number of shares
410,217 sh
Holdings current value
$545.53M
Avg closing price
$1258
-7.3%
Last action
Trimmed 29.9%
2025Q4
Current $1166
56
M
METAMETA PLATFORMS INC
Communication Services·Internet Content & Information
0.39%
of portfolio
Number of shares
788,790 sh
Holdings current value
$520.67M
Avg closing price
$530.96
+24.1%
Last action
Trimmed 22.0%
2025Q4
Current $659.15
57
C
CMECME GROUP INC
Financial Services·Financial Data & Stock Exchanges
0.39%
of portfolio
Number of shares
1,879,018 sh
Holdings current value
$513.12M
Avg closing price
$220.20
+29.6%
Last action
Trimmed 3.2%
2025Q4
Current $285.47
58
C
CATCATERPILLAR INC
Industrials·Farm & Heavy Construction Machinery
0.38%
of portfolio
Number of shares
880,170 sh
Holdings current value
$504.22M
Avg closing price
$366.43
+127.9%
Last action
Trimmed 30.7%
2025Q4
Current $835.24
59
A
AAPLAPPLE INC
Technology·Consumer Electronics
0.36%
of portfolio
Number of shares
1,760,880 sh
Holdings current value
$478.71M
Avg closing price
$178.30
+53.4%
Last action
Trimmed 15.7%
2025Q3
Current $273.43
60
P
PYPLPAYPAL HLDGS INC
Financial Services·Credit Services
0.36%
of portfolio
Number of shares
8,168,490 sh
Holdings current value
$476.88M
Avg closing price
$63.90
-22.1%
Last action
Added 22.3%
2025Q4
Current $49.75
61
D
DLTRDOLLAR TREE INC
Consumer Defensive·Discount Stores
0.36%
of portfolio
Number of shares
3,832,425 sh
Holdings current value
$471.43M
Avg closing price
$109.37
-6.5%
Last action
Trimmed 8.6%
2025Q4
Current $102.25
62
H
HPEHEWLETT PACKARD ENTERPRISE C
Technology·Communication Equipment
0.35%
of portfolio
Number of shares
19,212,717 sh
Holdings current value
$461.49M
Avg closing price
$17.73
+57.5%
Last action
Trimmed 8.0%
2025Q4
Current $27.93
63
F
FICOFAIR ISAAC CORP
Technology·Software - Application
0.31%
of portfolio
Number of shares
243,374 sh
Holdings current value
$411.45M
Avg closing price
$1572
-37.7%
Last action
Added 34.7%
2025Q4
Current $979.76
64
Q
QCOMQUALCOMM INC
Technology·Semiconductors
0.30%
of portfolio
Number of shares
2,338,084 sh
Holdings current value
$399.93M
Avg closing price
$169.30
-20.9%
Last action
Trimmed 5.0%
2025Q4
Current $133.95
65
A
ALBALBEMARLE CORP
Basic Materials·Specialty Chemicals
0.30%
of portfolio
Number of shares
2,805,069 sh
Holdings current value
$396.75M
Avg closing price
$130.71
+47.8%
Last action
Trimmed 13.8%
2025Q4
Current $193.14
66
B
BAHBOOZ ALLEN HAMILTON HLDG COR
Industrials·Consulting Services
0.30%
of portfolio
Number of shares
4,666,298 sh
Holdings current value
$393.65M
Avg closing price
$92.13
-14.2%
Last action
Added 135.2%
2025Q4
Current $79.01
67
H
HPQHP INC
Technology·Computer Hardware
0.30%
of portfolio
Number of shares
17,655,485 sh
Holdings current value
$393.36M
Avg closing price
$30.50
-34.0%
Last action
Trimmed 2.6%
2025Q4
Current $20.14
68
G
G3643J108FLUTTER ENTMT PLC
0.29%
of portfolio
Number of shares
1,787,790 sh
Holdings current value
$384.45M
Avg closing price
$248.42
Last action
Added 5.2%
2025Q4
Current —
69
A
ASMLASML HOLDING N V
Technology·Semiconductor Equipment & Materials
0.29%
of portfolio
Number of shares
356,776 sh
Holdings current value
$381.70M
Avg closing price
$970.47
+46.1%
Last action
Trimmed 7.9%
2025Q4
Current $1418
70
G
GKOSGLAUKOS CORP
Healthcare·Medical Devices
0.29%
of portfolio
Number of shares
3,376,928 sh
Holdings current value
$381.29M
Avg closing price
$103.35
+17.0%
Last action
Added 49.8%
2025Q4
Current $120.87
71
G
G54950103LINDE PLC
0.29%
of portfolio
Number of shares
888,620 sh
Holdings current value
$378.90M
Avg closing price
$450.85
Last action
Added 64.9%
2025Q4
Current —
72
N
NFLXNETFLIX INC
Communication Services·Entertainment
0.29%
of portfolio
Number of shares
4,023,110 sh
Holdings current value
$377.21M
Avg closing price
$127.59
-27.3%
Last action
Added 1950.1%
2025Q4
Current $92.82
73
C
CSCOCISCO SYS INC
Technology·Communication Equipment
0.28%
of portfolio
Number of shares
4,841,060 sh
Holdings current value
$372.91M
Avg closing price
$49.91
+77.5%
Last action
Trimmed 7.8%
2025Q4
Current $88.59
74
R
RYTMRHYTHM PHARMACEUTICALS INC
Healthcare·Biotechnology
0.28%
of portfolio
Number of shares
3,478,669 sh
Holdings current value
$372.36M
Avg closing price
$43.33
+96.7%
Last action
Trimmed 18.4%
2025Q4
Current $85.21
75
G
GLWCORNING INC
Technology·Electronic Components
0.27%
of portfolio
Number of shares
4,138,172 sh
Holdings current value
$362.34M
Avg closing price
$32.96
+414.3%
Last action
Trimmed 10.0%
2025Q4
Current $169.50

Portfolio heatmap

Box size = % of portfolio · color = return since filing
LLY
7.54% · -14.6%
MU
5.36% · +68.8%
GOOGL
3.58% · +8.3%
MSFT
2.67% · -14.0%
KLAC
2.65% · +49.4%
AZN
2.57% · +109.2%
NVDA
2.43% · +7.0%
BSX
2.24% · -31.1%
AMGN
2.21% · +6.5%
TSLA
2.15% · -16.9%
AMZN
2.14% · +10.5%
INTC
2.13% · +81.0%
BABA
2.11% · -10.2%
BIIB
1.97% · +6.8%
FDX
1.86% · +35.9%
SCHW
1.76% · -11.0%
LUV
1.48% · -8.7%
GOOG
1.37% · +7.6%
UAL
1.35% · -18.4%
TXN
1.32% · +62.7%
ROST
1.26% · +26.0%
FLEX LTD
1.22%
ONC
1.15% · -1.3%
RJF
1.14% · -4.5%

Sector exposure

Share of dollar value across the latest reported portfolio. Unclassified positions excluded.
  • Technology75 pos$38.28B29.9%
  • Healthcare51 pos$34.28B26.8%
  • Industrials49 pos$15.22B11.9%
  • Consumer Cyclical34 pos$13.96B10.9%
  • Financial Services27 pos$11.51B9.0%
  • Communication Services16 pos$10.20B8.0%
  • Energy11 pos$1.87B1.5%
  • Consumer Defensive14 pos$1.69B1.3%
  • Basic Materials11 pos$796.4M0.6%
  • Real Estate2 pos$81.5M0.1%
  • Utilities1 pos$12.3M0.0%
(3.2% unclassified, excluded from %)