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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
  • Overview
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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 · 2025Q3
1 / 5
75 of 327
1
L
LLYLILLY ELI & CO
Healthcare·Drug Manufacturers - General
6.31%
of portfolio
Number of shares
10,795,338 sh
Holdings current value
$8.24B
Avg closing price
$777.96
+18.0%
Last action
Trimmed 12.4%
2025Q4
Current $917.65
2
M
MUMICRON TECHNOLOGY INC
Technology·Semiconductors
3.80%
of portfolio
Number of shares
29,655,435 sh
Holdings current value
$4.96B
Avg closing price
$117.81
+308.9%
Last action
Trimmed 14.1%
2025Q4
Current $481.72
3
M
MSFTMICROSOFT CORP
Technology·Software - Infrastructure
3.33%
of portfolio
Number of shares
8,389,305 sh
Holdings current value
$4.35B
Avg closing price
$420.96
-1.2%
Last action
Trimmed 11.6%
2025Q4
Current $415.75
4
G
GOOGLALPHABET INC
Communication Services·Internet Content & Information
2.94%
of portfolio
Number of shares
15,777,214 sh
Holdings current value
$3.84B
Avg closing price
$151.47
+123.7%
Last action
Trimmed 4.0%
2025Q4
Current $338.89
5
K
KLACKLA CORP
Technology·Semiconductor Equipment & Materials
2.92%
of portfolio
Number of shares
3,535,182 sh
Holdings current value
$3.81B
Avg closing price
$698.57
+159.9%
Last action
Trimmed 15.7%
2025Q4
Current $1815
6
B
BABAALIBABA GROUP HLDG LTDADR
Consumer Cyclical·Internet Retail
2.74%
of portfolio
Number of shares
19,988,166 sh
Holdings current value
$3.57B
Avg closing price
$72.71
+81.1%
Last action
Trimmed 4.8%
2025Q4
Current $131.70
7
N
NVDANVIDIA CORPORATION
Technology·Semiconductors
2.68%
of portfolio
Number of shares
18,765,600 sh
Holdings current value
$3.50B
Avg closing price
$206.69
-3.4%
Last action
Trimmed 7.6%
2025Q4
Current $199.64
8
B
BSXBOSTON SCIENTIFIC CORP
Healthcare·Medical Devices
2.48%
of portfolio
Number of shares
33,102,094 sh
Holdings current value
$3.23B
Avg closing price
$68.49
-4.1%
Last action
Trimmed 5.7%
2025Q4
Current $65.69
9
A
AZNASTRAZENECA PLCADR
Healthcare·Drug Manufacturers - General
2.34%
of portfolio
Number of shares
39,857,971 sh
Holdings current value
$3.06B
Avg closing price
$67.78
+183.7%
Last action
Trimmed 6.9%
2025Q4
Current $192.30
10
T
TSLATESLA INC
Consumer Cyclical·Auto Manufacturers
2.26%
of portfolio
Number of shares
6,622,130 sh
Holdings current value
$2.94B
Avg closing price
$175.79
+112.6%
Last action
Trimmed 4.4%
2025Q4
Current $373.72
11
A
AMGNAMGEN INC
Healthcare·Drug Manufacturers - General
2.10%
of portfolio
Number of shares
9,707,609 sh
Holdings current value
$2.74B
Avg closing price
$284.32
+22.6%
Last action
Trimmed 7.6%
2025Q4
Current $348.62
12
I
INTCINTEL CORP
Technology·Semiconductors
2.04%
of portfolio
Number of shares
79,405,510 sh
Holdings current value
$2.66B
Avg closing price
$43.00
+55.3%
Last action
Trimmed 4.0%
2025Q4
Current $66.78
13
A
AMZNAMAZON COM INC
Consumer Cyclical·Internet Retail
1.80%
of portfolio
Number of shares
10,713,238 sh
Holdings current value
$2.35B
Avg closing price
$206.84
+23.3%
Last action
Added 16.8%
2025Q4
Current $255.08
14
F
FDXFEDEX CORP
Industrials·Integrated Freight & Logistics
1.71%
of portfolio
Number of shares
9,442,250 sh
Holdings current value
$2.23B
Avg closing price
$289.74
+35.5%
Last action
Trimmed 9.0%
2025Q4
Current $392.69
15
O
ORCLORACLE CORP
Technology·Software - Infrastructure
1.62%
of portfolio
Number of shares
7,536,326 sh
Holdings current value
$2.12B
Avg closing price
$128.98
+36.7%
Last action
Trimmed 16.6%
2025Q4
Current $176.28
16
B
BIIBBIOGEN INC
Healthcare·Drug Manufacturers - General
1.60%
of portfolio
Number of shares
14,954,697 sh
Holdings current value
$2.09B
Avg closing price
$215.75
-12.9%
Last action
Trimmed 1.3%
2025Q4
Current $187.88
17
T
TXNTEXAS INSTRS INC
Technology·Semiconductors
1.58%
of portfolio
Number of shares
11,231,376 sh
Holdings current value
$2.06B
Avg closing price
$174.21
+62.0%
Last action
Trimmed 9.3%
2025Q4
Current $282.23
18
S
SCHWSCHWAB CHARLES CORP
Financial Services·Capital Markets
1.55%
of portfolio
Number of shares
21,209,187 sh
Holdings current value
$2.02B
Avg closing price
$83.75
+6.2%
Last action
Added 10.8%
2025Q4
Current $88.92
19
S
SONYSONY GROUP CORPORATIONADR
Technology·Consumer Electronics
1.42%
of portfolio
Number of shares
64,442,090 sh
Holdings current value
$1.86B
Avg closing price
$34.63
-40.8%
Last action
Trimmed 8.7%
2025Q4
Current $20.49
20
U
UALUNITED AIRLS HLDGS INC
Industrials·Airlines
1.33%
of portfolio
Number of shares
18,002,960 sh
Holdings current value
$1.74B
Avg closing price
$47.88
+90.6%
Last action
Trimmed 10.1%
2025Q4
Current $91.25
21
O
ONCBEIGENE LTDADR
Healthcare·Biotechnology
1.33%
of portfolio
Number of shares
5,080,461 sh
Holdings current value
$1.73B
Avg closing price
$157.63
+90.2%
Last action
Trimmed 1.9%
2025Q4
Current $299.81
22
Y
Y2573F102FLEX LTD
1.31%
of portfolio
Number of shares
29,610,278 sh
Holdings current value
$1.72B
Avg closing price
$28.61
Last action
Trimmed 8.9%
2025Q4
Current —
23
R
RJFRAYMOND JAMES FINL INC
Financial Services·Asset Management
1.28%
of portfolio
Number of shares
9,646,282 sh
Holdings current value
$1.66B
Avg closing price
$129.16
+18.8%
Last action
Trimmed 3.1%
2025Q4
Current $153.41
24
B
BIDUBAIDU INCADR
Communication Services·Internet Content & Information
1.22%
of portfolio
Number of shares
12,112,300 sh
Holdings current value
$1.60B
Avg closing price
$102.32
+18.8%
Last action
Trimmed 7.7%
2025Q4
Current $121.53
25
L
LUVSOUTHWEST AIRLS CO
Industrials·Airlines
1.17%
of portfolio
Number of shares
47,996,113 sh
Holdings current value
$1.53B
Avg closing price
$29.26
+29.0%
Last action
Trimmed 1.2%
2025Q4
Current $37.75
26
T
TJXTJX COS INC NEW
Consumer Cyclical·Apparel Retail
1.17%
of portfolio
Number of shares
10,524,552 sh
Holdings current value
$1.52B
Avg closing price
$101.42
+56.1%
Last action
Trimmed 6.9%
2025Q4
Current $158.35
27
R
ROSTROSS STORES INC
Consumer Cyclical·Apparel Retail
1.16%
of portfolio
Number of shares
9,954,910 sh
Holdings current value
$1.52B
Avg closing price
$146.66
+54.7%
Last action
Trimmed 7.0%
2025Q4
Current $226.92
28
G
GOOGALPHABET INC
Communication Services·Internet Content & Information
1.14%
of portfolio
Number of shares
6,126,946 sh
Holdings current value
$1.49B
Avg closing price
$152.26
+121.8%
Last action
Trimmed 5.6%
2025Q4
Current $337.75
29
V
VVISA INC
Financial Services·Credit Services
1.06%
of portfolio
Number of shares
4,064,781 sh
Holdings current value
$1.39B
Avg closing price
$285.77
+8.1%
Last action
Trimmed 1.4%
2025Q4
Current $308.88
30
A
ADBEADOBE SYSTEMS INCORPORATED
Technology·Software - Application
1.04%
of portfolio
Number of shares
3,857,505 sh
Holdings current value
$1.36B
Avg closing price
$504.60
-52.6%
Last action
Trimmed 4.5%
2025Q4
Current $238.98
31
W
WFCWELLS FARGO CO NEW
Financial Services·Banks - Diversified
0.96%
of portfolio
Number of shares
14,926,855 sh
Holdings current value
$1.25B
Avg closing price
$57.96
+38.9%
Last action
Trimmed 30.6%
2025Q4
Current $80.51
32
J
JPMJPMORGAN CHASE & CO
Financial Services·Banks - Diversified
0.93%
of portfolio
Number of shares
3,838,067 sh
Holdings current value
$1.21B
Avg closing price
$200.57
+55.4%
Last action
Trimmed 5.7%
2025Q4
Current $311.69
33
N
NVSNOVARTIS AGADR
Healthcare·Drug Manufacturers - General
0.92%
of portfolio
Number of shares
9,341,854 sh
Holdings current value
$1.20B
Avg closing price
$96.77
+52.4%
Last action
Trimmed 15.9%
2025Q4
Current $147.48
34
A
ACMAECOM
Industrials·Engineering & Construction
0.89%
of portfolio
Number of shares
8,878,363 sh
Holdings current value
$1.16B
Avg closing price
$98.08
-18.0%
Last action
Trimmed 2.3%
2025Q4
Current $80.46
35
N
NTAPNETAPP INC
Technology·Software - Infrastructure
0.87%
of portfolio
Number of shares
9,630,055 sh
Holdings current value
$1.14B
Avg closing price
$104.97
+3.3%
Last action
Trimmed 5.5%
2025Q4
Current $108.40
36
T
TMOTHERMO FISHER SCIENTIFIC INC
Healthcare·Diagnostics & Research
0.86%
of portfolio
Number of shares
2,303,322 sh
Holdings current value
$1.12B
Avg closing price
$574.72
-18.8%
Last action
Trimmed 9.7%
2025Q4
Current $466.70
37
G
GSKGSK PLCADR
Healthcare·Drug Manufacturers - General
0.85%
of portfolio
Number of shares
25,766,950 sh
Holdings current value
$1.11B
Avg closing price
$38.78
+43.5%
Last action
Trimmed 2.4%
2025Q4
Current $55.63
38
D
DALDELTA AIR LINES INC DEL
Industrials·Airlines
0.80%
of portfolio
Number of shares
18,293,987 sh
Holdings current value
$1.04B
Avg closing price
$47.87
+42.8%
Last action
Trimmed 3.7%
2025Q4
Current $68.37
39
N
NTRSNORTHERN TR CORP
Financial Services·Asset Management
0.78%
of portfolio
Number of shares
7,541,367 sh
Holdings current value
$1.02B
Avg closing price
$94.95
+74.2%
Last action
Trimmed 11.0%
2025Q4
Current $165.39
40
E
ELANELANCO ANIMAL HEALTH INC
Healthcare·Drug Manufacturers - Specialty & Generic
0.77%
of portfolio
Number of shares
49,958,156 sh
Holdings current value
$1.01B
Avg closing price
$16.22
+38.0%
Last action
Trimmed 7.0%
2025Q4
Current $22.39
41
B
BMYBRISTOL-MYERS SQUIBB CO
Healthcare·Drug Manufacturers - General
0.76%
of portfolio
Number of shares
22,094,320 sh
Holdings current value
$996.45M
Avg closing price
$54.14
+9.0%
Last action
Added 14.4%
2025Q4
Current $59.02
42
C
CVXCHEVRON CORP NEW
Energy·Oil & Gas Integrated
0.76%
of portfolio
Number of shares
6,362,826 sh
Holdings current value
$988.08M
Avg closing price
$155.29
+20.8%
Last action
Trimmed 38.8%
2025Q4
Current $187.60
43
C
COPCONOCOPHILLIPS
Energy·Oil & Gas E&P
0.75%
of portfolio
Number of shares
10,351,010 sh
Holdings current value
$979.10M
Avg closing price
$102.75
+21.0%
Last action
Added 13.4%
2025Q4
Current $124.37
44
V
V7780T103ROYAL CARIBBEAN GROUP
0.68%
of portfolio
Number of shares
2,756,921 sh
Holdings current value
$892.08M
Avg closing price
$139.01
Last action
Trimmed 11.2%
2025Q4
Current —
45
B
BMRNBIOMARIN PHARMACEUTICAL INC
Healthcare·Biotechnology
0.63%
of portfolio
Number of shares
15,229,287 sh
Holdings current value
$824.82M
Avg closing price
$87.25
-38.1%
Last action
Trimmed 4.3%
2025Q4
Current $53.98
46
A
ADIANALOG DEVICES INC
Technology·Semiconductors
0.62%
of portfolio
Number of shares
3,280,120 sh
Holdings current value
$805.93M
Avg closing price
$197.79
+104.2%
Last action
Trimmed 4.1%
2025Q4
Current $403.88
47
T
TDGTRANSDIGM GROUP INC
Industrials·Aerospace & Defense
0.59%
of portfolio
Number of shares
585,373 sh
Holdings current value
$771.53M
Avg closing price
$1258
-7.3%
Last action
Trimmed 23.0%
2025Q4
Current $1166
48
I
INTUINTUIT
Technology·Software - Application
0.59%
of portfolio
Number of shares
1,121,452 sh
Holdings current value
$765.85M
Avg closing price
$650.00
-41.0%
Last action
Trimmed 5.5%
2025Q4
Current $383.30
49
M
METAMETA PLATFORMS INC
Communication Services·Internet Content & Information
0.57%
of portfolio
Number of shares
1,010,840 sh
Holdings current value
$742.34M
Avg closing price
$530.96
+24.1%
Last action
Trimmed 18.0%
2025Q4
Current $659.15
50
J
JBLJABIL INC
Technology·Electronic Components
0.55%
of portfolio
Number of shares
3,331,070 sh
Holdings current value
$723.41M
Avg closing price
$134.15
+152.4%
Last action
Added 0.4%
2025Q4
Current $338.53
51
D
DISDISNEY WALT CO
Communication Services·Entertainment
0.55%
of portfolio
Number of shares
6,247,506 sh
Holdings current value
$715.34M
Avg closing price
$122.40
-15.3%
Last action
Trimmed 0.2%
2025Q4
Current $103.65
52
J
JJACOBS SOLUTIONS INC
Industrials·Engineering & Construction
0.53%
of portfolio
Number of shares
4,590,999 sh
Holdings current value
$688.01M
Avg closing price
$153.28
-16.8%
Last action
Trimmed 1.4%
2025Q4
Current $127.58
53
C
CATCATERPILLAR INC
Industrials·Farm & Heavy Construction Machinery
0.46%
of portfolio
Number of shares
1,270,428 sh
Holdings current value
$606.18M
Avg closing price
$366.43
+127.9%
Last action
Trimmed 23.5%
2025Q4
Current $835.24
54
A
AALAMERICAN AIRLS GROUP INC
Industrials·Airlines
0.43%
of portfolio
Number of shares
49,641,939 sh
Holdings current value
$557.98M
Avg closing price
$14.43
-18.4%
Last action
Trimmed 1.3%
2025Q4
Current $11.78
55
N
NXTNEXTRACKER INC
Technology·Solar
0.42%
of portfolio
Number of shares
7,460,451 sh
Holdings current value
$552.00M
Avg closing price
$56.25
+121.1%
Last action
Trimmed 6.4%
2025Q4
Current $124.36
56
M
MATMATTEL INC
Consumer Cyclical·Leisure
0.40%
of portfolio
Number of shares
31,354,147 sh
Holdings current value
$527.69M
Avg closing price
$19.81
-25.5%
Last action
Trimmed 4.7%
2025Q4
Current $14.76
57
C
CMECME GROUP INC
Financial Services·Financial Data & Stock Exchanges
0.40%
of portfolio
Number of shares
1,940,588 sh
Holdings current value
$524.33M
Avg closing price
$220.20
+29.6%
Last action
Trimmed 3.1%
2025Q4
Current $285.47
58
H
HPEHEWLETT PACKARD ENTERPRISE C
Technology·Communication Equipment
0.39%
of portfolio
Number of shares
20,889,987 sh
Holdings current value
$513.06M
Avg closing price
$17.73
+57.5%
Last action
Trimmed 7.4%
2025Q4
Current $27.93
59
H
HPQHP INC
Technology·Computer Hardware
0.38%
of portfolio
Number of shares
18,132,345 sh
Holdings current value
$493.74M
Avg closing price
$30.50
-34.0%
Last action
Trimmed 2.6%
2025Q4
Current $20.14
60
A
AAPLAPPLE INC
Technology·Consumer Electronics
0.34%
of portfolio
Number of shares
1,760,880 sh
Holdings current value
$448.37M
Avg closing price
$178.30
+53.4%
Last action
Trimmed 15.7%
2025Q3
Current $273.43
61
P
PYPLPAYPAL HLDGS INC
Financial Services·Credit Services
0.34%
of portfolio
Number of shares
6,680,930 sh
Holdings current value
$448.02M
Avg closing price
$63.90
-22.1%
Last action
Added 28.6%
2025Q4
Current $49.75
62
G
G3643J108FLUTTER ENTMT PLC
0.33%
of portfolio
Number of shares
1,699,488 sh
Holdings current value
$431.67M
Avg closing price
$248.42
Last action
Added 5.5%
2025Q4
Current —
63
R
RYTMRHYTHM PHARMACEUTICALS INC
Healthcare·Biotechnology
0.33%
of portfolio
Number of shares
4,262,859 sh
Holdings current value
$430.51M
Avg closing price
$43.33
+96.7%
Last action
Trimmed 15.5%
2025Q4
Current $85.21
64
Z
ZBHZIMMER BIOMET HOLDINGS INC
Healthcare·Medical Devices
0.32%
of portfolio
Number of shares
4,250,630 sh
Holdings current value
$418.69M
Avg closing price
$131.74
-29.8%
Last action
Trimmed 5.6%
2025Q4
Current $92.44
65
Q
QCOMQUALCOMM INC
Technology·Semiconductors
0.31%
of portfolio
Number of shares
2,461,722 sh
Holdings current value
$409.53M
Avg closing price
$169.30
-20.9%
Last action
Trimmed 4.8%
2025Q4
Current $133.95
66
D
DLTRDOLLAR TREE INC
Consumer Defensive·Discount Stores
0.30%
of portfolio
Number of shares
4,194,049 sh
Holdings current value
$395.79M
Avg closing price
$109.37
-6.5%
Last action
Trimmed 7.9%
2025Q4
Current $102.25
67
M
MKTXMARKETAXESS HLDGS INC
Financial Services·Capital Markets
0.30%
of portfolio
Number of shares
2,230,595 sh
Holdings current value
$388.68M
Avg closing price
$194.29
-15.8%
Last action
Added 73.5%
2025Q4
Current $163.61
68
B
BNTXBIONTECH SEADR
Healthcare·Biotechnology
0.29%
of portfolio
Number of shares
3,870,766 sh
Holdings current value
$381.73M
Avg closing price
$92.25
+14.4%
Last action
Trimmed 1.8%
2025Q4
Current $105.56
69
G
GLWCORNING INC
Technology·Electronic Components
0.29%
of portfolio
Number of shares
4,600,372 sh
Holdings current value
$377.37M
Avg closing price
$32.96
+414.3%
Last action
Trimmed 9.1%
2025Q4
Current $169.50
70
A
ASMLASML HOLDING N V
Technology·Semiconductor Equipment & Materials
0.29%
of portfolio
Number of shares
387,476 sh
Holdings current value
$375.11M
Avg closing price
$970.47
+46.1%
Last action
Trimmed 7.3%
2025Q4
Current $1418
71
M
MRSHMARSH & MCLENNAN COS INC
Financial Services·Insurance Brokers
0.28%
of portfolio
Number of shares
1,821,016 sh
Holdings current value
$366.99M
Avg closing price
$205.98
-15.5%
Last action
Trimmed 41.7%
2025Q4
Current $174.01
72
C
CSCOCISCO SYS INC
Technology·Communication Equipment
0.28%
of portfolio
Number of shares
5,248,560 sh
Holdings current value
$359.11M
Avg closing price
$49.91
+77.5%
Last action
Trimmed 7.2%
2025Q4
Current $88.59
73
T
TERTERADYNE INC
Technology·Semiconductor Equipment & Materials
0.27%
of portfolio
Number of shares
2,551,268 sh
Holdings current value
$351.16M
Avg closing price
$104.37
+284.2%
Last action
Trimmed 41.8%
2025Q4
Current $400.99
74
N
NOCNORFOLK SOUTHN CORP
Industrials·Railroads
0.26%
of portfolio
Number of shares
1,132,583 sh
Holdings current value
$340.24M
Avg closing price
$253.31
+132.0%
Last action
Trimmed 10.3%
2025Q4
Current $587.66
75
W
WHRWHIRLPOOL CORP
Consumer Cyclical·Furnishings, Fixtures & Appliances
0.26%
of portfolio
Number of shares
4,309,878 sh
Holdings current value
$338.76M
Avg closing price
$119.33
-54.6%
Last action
Trimmed 10.3%
2025Q4
Current $54.20

Portfolio heatmap

Box size = % of portfolio · color = return since filing
LLY
6.31% · +20.3%
MU
3.80% · +187.9%
MSFT
3.33% · -19.7%
GOOGL
2.94% · +39.4%
KLAC
2.92% · +68.3%
BABA
2.74% · -26.3%
NVDA
2.68% · +7.0%
BSX
2.48% · -32.7%
AZN
2.34% · +150.7%
TSLA
2.26% · -16.0%
AMGN
2.10% · +23.5%
INTC
2.04% · +99.0%
AMZN
1.80% · +16.2%
FDX
1.71% · +66.5%
ORCL
1.62% · -37.3%
BIIB
1.60% · +34.1%
TXN
1.58% · +53.6%
SCHW
1.55% · -6.9%
SONY
1.42% · -28.8%
UAL
1.33% · -5.4%
ONC
1.33% · -12.0%
FLEX LTD
1.31%
RJF
1.28% · -11.1%
BIDU
1.22% · -7.8%

Sector exposure

Share of dollar value across the latest reported portfolio. Unclassified positions excluded.
  • Technology74 pos$39.22B31.1%
  • Healthcare51 pos$31.23B24.8%
  • Industrials51 pos$14.74B11.7%
  • Consumer Cyclical36 pos$14.30B11.3%
  • Financial Services26 pos$11.89B9.4%
  • Communication Services19 pos$9.39B7.4%
  • Energy10 pos$2.51B2.0%
  • Consumer Defensive14 pos$1.79B1.4%
  • Basic Materials10 pos$854.5M0.7%
  • Real Estate4 pos$91.2M0.1%
  • Utilities1 pos$9.1M0.0%
(3.5% unclassified, excluded from %)