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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 · 2025Q1
1 / 5
75 of 335
1
L
LLYLILLY ELI & CO
Healthcare·Drug Manufacturers - General
10.09%
of portfolio
Number of shares
14,779,770 sh
Holdings current value
$12.21B
Avg closing price
$777.96
+18.0%
Last action
Trimmed 9.4%
2025Q4
Current $917.65
2
A
AMGNAMGEN INC
Healthcare·Drug Manufacturers - General
3.19%
of portfolio
Number of shares
12,388,295 sh
Holdings current value
$3.86B
Avg closing price
$284.32
+22.6%
Last action
Trimmed 6.1%
2025Q4
Current $348.62
3
B
BSXBOSTON SCIENTIFIC CORP
Healthcare·Medical Devices
3.04%
of portfolio
Number of shares
36,496,946 sh
Holdings current value
$3.68B
Avg closing price
$68.49
-4.1%
Last action
Trimmed 5.2%
2025Q4
Current $65.69
4
M
MSFTMICROSOFT CORP
Technology·Software - Infrastructure
2.82%
of portfolio
Number of shares
9,086,990 sh
Holdings current value
$3.41B
Avg closing price
$420.96
-1.2%
Last action
Trimmed 10.8%
2025Q4
Current $415.75
5
K
KLACKLA CORP
Technology·Semiconductor Equipment & Materials
2.74%
of portfolio
Number of shares
4,877,009 sh
Holdings current value
$3.32B
Avg closing price
$698.57
+159.9%
Last action
Trimmed 11.9%
2025Q4
Current $1815
6
M
MUMICRON TECHNOLOGY INC
Technology·Semiconductors
2.68%
of portfolio
Number of shares
37,280,768 sh
Holdings current value
$3.24B
Avg closing price
$117.81
+308.9%
Last action
Trimmed 11.5%
2025Q4
Current $481.72
7
A
AZNASTRAZENECA PLCADR
Healthcare·Drug Manufacturers - General
2.47%
of portfolio
Number of shares
40,661,485 sh
Holdings current value
$2.99B
Avg closing price
$67.78
+183.7%
Last action
Trimmed 6.7%
2025Q4
Current $192.30
8
F
FDXFEDEX CORP
Industrials·Integrated Freight & Logistics
2.40%
of portfolio
Number of shares
11,931,800 sh
Holdings current value
$2.91B
Avg closing price
$289.74
+35.5%
Last action
Trimmed 7.2%
2025Q4
Current $392.69
9
B
BABAALIBABA GROUP HLDG LTDADR
Consumer Cyclical·Internet Retail
2.25%
of portfolio
Number of shares
20,623,697 sh
Holdings current value
$2.73B
Avg closing price
$72.71
+81.1%
Last action
Trimmed 4.7%
2025Q4
Current $131.70
10
G
GOOGLALPHABET INC
Communication Services·Internet Content & Information
2.10%
of portfolio
Number of shares
16,387,934 sh
Holdings current value
$2.53B
Avg closing price
$151.47
+123.7%
Last action
Trimmed 3.8%
2025Q4
Current $338.89
11
T
TXNTEXAS INSTRS INC
Technology·Semiconductors
2.08%
of portfolio
Number of shares
13,991,539 sh
Holdings current value
$2.51B
Avg closing price
$174.21
+62.0%
Last action
Trimmed 7.6%
2025Q4
Current $282.23
12
S
SONYSONY GROUP CORPORATIONADR
Technology·Consumer Electronics
1.97%
of portfolio
Number of shares
93,959,475 sh
Holdings current value
$2.39B
Avg closing price
$34.63
-40.8%
Last action
Trimmed 6.1%
2025Q4
Current $20.49
13
N
NVDANVIDIA CORPORATION
Technology·Semiconductors
1.84%
of portfolio
Number of shares
20,547,000 sh
Holdings current value
$2.23B
Avg closing price
$206.69
-3.4%
Last action
Trimmed 7.0%
2025Q4
Current $199.64
14
B
BIIBBIOGEN INC
Healthcare·Drug Manufacturers - General
1.80%
of portfolio
Number of shares
15,943,259 sh
Holdings current value
$2.18B
Avg closing price
$215.75
-12.9%
Last action
Trimmed 1.2%
2025Q4
Current $187.88
15
A
ADBEADOBE SYSTEMS INCORPORATED
Technology·Software - Application
1.72%
of portfolio
Number of shares
5,421,591 sh
Holdings current value
$2.08B
Avg closing price
$504.60
-52.6%
Last action
Trimmed 3.2%
2025Q4
Current $238.98
16
T
TSLATESLA INC
Consumer Cyclical·Auto Manufacturers
1.52%
of portfolio
Number of shares
7,082,210 sh
Holdings current value
$1.84B
Avg closing price
$175.79
+112.6%
Last action
Trimmed 4.1%
2025Q4
Current $373.72
17
I
INTCINTEL CORP
Technology·Semiconductors
1.45%
of portfolio
Number of shares
76,984,290 sh
Holdings current value
$1.75B
Avg closing price
$43.00
+55.3%
Last action
Trimmed 4.1%
2025Q4
Current $66.78
18
G
GOOGALPHABET INC
Communication Services·Internet Content & Information
1.41%
of portfolio
Number of shares
10,895,645 sh
Holdings current value
$1.70B
Avg closing price
$152.26
+121.8%
Last action
Trimmed 3.2%
2025Q4
Current $337.75
19
L
LUVSOUTHWEST AIRLS CO
Industrials·Airlines
1.38%
of portfolio
Number of shares
49,688,308 sh
Holdings current value
$1.67B
Avg closing price
$29.26
+29.0%
Last action
Trimmed 1.2%
2025Q4
Current $37.75
20
W
WFCWELLS FARGO CO NEW
Financial Services·Banks - Diversified
1.30%
of portfolio
Number of shares
21,902,649 sh
Holdings current value
$1.57B
Avg closing price
$57.96
+38.9%
Last action
Trimmed 23.1%
2025Q4
Current $80.51
21
O
ORCLORACLE CORP
Technology·Software - Infrastructure
1.25%
of portfolio
Number of shares
10,777,275 sh
Holdings current value
$1.51B
Avg closing price
$128.98
+36.7%
Last action
Trimmed 12.3%
2025Q4
Current $176.28
22
U
UALUNITED AIRLS HLDGS INC
Industrials·Airlines
1.24%
of portfolio
Number of shares
21,799,645 sh
Holdings current value
$1.51B
Avg closing price
$47.88
+90.6%
Last action
Trimmed 8.5%
2025Q4
Current $91.25
23
T
TJXTJX COS INC NEW
Consumer Cyclical·Apparel Retail
1.18%
of portfolio
Number of shares
11,701,067 sh
Holdings current value
$1.43B
Avg closing price
$101.42
+56.1%
Last action
Trimmed 6.3%
2025Q4
Current $158.35
24
B
BMYBRISTOL-MYERS SQUIBB CO
Healthcare·Drug Manufacturers - General
1.16%
of portfolio
Number of shares
22,970,633 sh
Holdings current value
$1.40B
Avg closing price
$54.14
+9.0%
Last action
Added 13.8%
2025Q4
Current $59.02
25
O
ONCBEIGENE LTDADR
Healthcare·Biotechnology
1.14%
of portfolio
Number of shares
5,055,504 sh
Holdings current value
$1.38B
Avg closing price
$157.63
+90.2%
Last action
Trimmed 1.9%
2025Q4
Current $299.81
26
V
VVISA INC
Financial Services·Credit Services
1.12%
of portfolio
Number of shares
3,873,280 sh
Holdings current value
$1.36B
Avg closing price
$285.77
+8.1%
Last action
Trimmed 1.4%
2025Q4
Current $308.88
27
R
RJFRAYMOND JAMES FINL INC
Financial Services·Asset Management
1.12%
of portfolio
Number of shares
9,718,689 sh
Holdings current value
$1.35B
Avg closing price
$129.16
+18.8%
Last action
Trimmed 3.0%
2025Q4
Current $153.41
28
R
ROSTROSS STORES INC
Consumer Cyclical·Apparel Retail
1.08%
of portfolio
Number of shares
10,216,935 sh
Holdings current value
$1.31B
Avg closing price
$146.66
+54.7%
Last action
Trimmed 6.8%
2025Q4
Current $226.92
29
B
BMRNBIOMARIN PHARMACEUTICAL INC
Healthcare·Biotechnology
1.04%
of portfolio
Number of shares
17,773,281 sh
Holdings current value
$1.26B
Avg closing price
$87.25
-38.1%
Last action
Trimmed 3.7%
2025Q4
Current $53.98
30
J
JPMJPMORGAN CHASE & CO
Financial Services·Banks - Diversified
1.02%
of portfolio
Number of shares
5,048,380 sh
Holdings current value
$1.24B
Avg closing price
$200.57
+55.4%
Last action
Trimmed 4.4%
2025Q4
Current $311.69
31
Y
Y2573F102FLEX LTD
0.99%
of portfolio
Number of shares
36,124,847 sh
Holdings current value
$1.20B
Avg closing price
$28.61
Last action
Trimmed 7.5%
2025Q4
Current —
32
N
NVSNOVARTIS AGADR
Healthcare·Drug Manufacturers - General
0.96%
of portfolio
Number of shares
10,382,879 sh
Holdings current value
$1.16B
Avg closing price
$96.77
+52.4%
Last action
Trimmed 14.5%
2025Q4
Current $147.48
33
T
TMOTHERMO FISHER SCIENTIFIC INC
Healthcare·Diagnostics & Research
0.95%
of portfolio
Number of shares
2,317,302 sh
Holdings current value
$1.15B
Avg closing price
$574.72
-18.8%
Last action
Trimmed 9.6%
2025Q4
Current $466.70
34
H
HESHESS CORP
0.94%
of portfolio
Number of shares
7,130,375 sh
Holdings current value
$1.14B
Avg closing price
$151.48
Last action
Exited
2025Q3
Current —
35
B
BIDUBAIDU INCADR
Communication Services·Internet Content & Information
0.91%
of portfolio
Number of shares
11,946,336 sh
Holdings current value
$1.10B
Avg closing price
$102.32
+18.8%
Last action
Trimmed 7.8%
2025Q4
Current $121.53
36
S
SCHWSCHWAB CHARLES CORP
Financial Services·Capital Markets
0.91%
of portfolio
Number of shares
14,002,078 sh
Holdings current value
$1.10B
Avg closing price
$83.75
+6.2%
Last action
Added 17.3%
2025Q4
Current $88.92
37
A
AMZNAMAZON COM INC
Consumer Cyclical·Internet Retail
0.87%
of portfolio
Number of shares
5,513,930 sh
Holdings current value
$1.05B
Avg closing price
$206.84
+23.3%
Last action
Added 38.9%
2025Q4
Current $255.08
38
N
NTAPNETAPP INC
Technology·Software - Infrastructure
0.84%
of portfolio
Number of shares
11,502,090 sh
Holdings current value
$1.01B
Avg closing price
$104.97
+3.3%
Last action
Trimmed 4.7%
2025Q4
Current $108.40
39
G
GSKGSK PLCADR
Healthcare·Drug Manufacturers - General
0.82%
of portfolio
Number of shares
25,708,020 sh
Holdings current value
$995.93M
Avg closing price
$38.78
+43.5%
Last action
Trimmed 2.4%
2025Q4
Current $55.63
40
A
ACMAECOM
Industrials·Engineering & Construction
0.78%
of portfolio
Number of shares
10,148,730 sh
Holdings current value
$941.09M
Avg closing price
$98.08
-18.0%
Last action
Trimmed 2.0%
2025Q4
Current $80.46
41
D
DALDELTA AIR LINES INC DEL
Industrials·Airlines
0.77%
of portfolio
Number of shares
21,407,647 sh
Holdings current value
$933.37M
Avg closing price
$47.87
+42.8%
Last action
Trimmed 3.2%
2025Q4
Current $68.37
42
I
INTUINTUIT
Technology·Software - Application
0.70%
of portfolio
Number of shares
1,384,565 sh
Holdings current value
$850.11M
Avg closing price
$650.00
-41.0%
Last action
Trimmed 4.5%
2025Q4
Current $383.30
43
X
XOMEXXON MOBIL CORP
Energy·Oil & Gas Integrated
0.61%
of portfolio
Number of shares
6,214,344 sh
Holdings current value
$739.07M
Avg closing price
$115.12
+30.8%
Last action
Trimmed 7.2%
2025Q4
Current $150.53
44
V
V7780T103ROYAL CARIBBEAN GROUP
0.60%
of portfolio
Number of shares
3,548,768 sh
Holdings current value
$729.06M
Avg closing price
$139.01
Last action
Trimmed 8.9%
2025Q4
Current —
45
T
TDGTRANSDIGM GROUP INC
Industrials·Aerospace & Defense
0.59%
of portfolio
Number of shares
512,844 sh
Holdings current value
$709.41M
Avg closing price
$1258
-7.3%
Last action
Trimmed 25.5%
2025Q4
Current $1166
46
A
ADIANALOG DEVICES INC
Technology·Semiconductors
0.58%
of portfolio
Number of shares
3,477,645 sh
Holdings current value
$701.34M
Avg closing price
$197.79
+104.2%
Last action
Trimmed 3.8%
2025Q4
Current $403.88
47
M
MATMATTEL INC
Consumer Cyclical·Leisure
0.56%
of portfolio
Number of shares
35,150,671 sh
Holdings current value
$682.98M
Avg closing price
$19.81
-25.5%
Last action
Trimmed 4.2%
2025Q4
Current $14.76
48
M
MRSHMARSH & MCLENNAN COS INC
Financial Services·Insurance Brokers
0.54%
of portfolio
Number of shares
2,687,926 sh
Holdings current value
$655.93M
Avg closing price
$205.98
-15.5%
Last action
Trimmed 32.6%
2025Q4
Current $174.01
49
N
NTRSNORTHERN TR CORP
Financial Services·Asset Management
0.53%
of portfolio
Number of shares
6,523,009 sh
Holdings current value
$643.49M
Avg closing price
$94.95
+74.2%
Last action
Trimmed 12.5%
2025Q4
Current $165.39
50
A
AALAMERICAN AIRLS GROUP INC
Industrials·Airlines
0.53%
of portfolio
Number of shares
60,445,097 sh
Holdings current value
$637.70M
Avg closing price
$14.43
-18.4%
Last action
Trimmed 1.0%
2025Q4
Current $11.78
51
D
DISDISNEY WALT CO
Communication Services·Entertainment
0.51%
of portfolio
Number of shares
6,194,424 sh
Holdings current value
$611.39M
Avg closing price
$122.40
-15.3%
Last action
Trimmed 0.2%
2025Q4
Current $103.65
52
H
HPQHP INC
Technology·Computer Hardware
0.49%
of portfolio
Number of shares
21,622,895 sh
Holdings current value
$598.74M
Avg closing price
$30.50
-34.0%
Last action
Trimmed 2.2%
2025Q4
Current $20.14
53
Q
QCOMQUALCOMM INC
Technology·Semiconductors
0.48%
of portfolio
Number of shares
3,754,032 sh
Holdings current value
$576.66M
Avg closing price
$169.30
-20.9%
Last action
Trimmed 3.2%
2025Q4
Current $133.95
54
J
JJACOBS SOLUTIONS INC
Industrials·Engineering & Construction
0.47%
of portfolio
Number of shares
4,653,442 sh
Holdings current value
$562.55M
Avg closing price
$153.28
-16.8%
Last action
Trimmed 1.4%
2025Q4
Current $127.58
55
Z
ZBHZIMMER BIOMET HOLDINGS INC
Healthcare·Medical Devices
0.44%
of portfolio
Number of shares
4,682,970 sh
Holdings current value
$530.02M
Avg closing price
$131.74
-29.8%
Last action
Trimmed 5.1%
2025Q4
Current $92.44
56
E
ELANELANCO ANIMAL HEALTH INC
Healthcare·Drug Manufacturers - Specialty & Generic
0.44%
of portfolio
Number of shares
50,223,535 sh
Holdings current value
$527.35M
Avg closing price
$16.22
+38.0%
Last action
Trimmed 6.9%
2025Q4
Current $22.39
57
M
METAMETA PLATFORMS INC
Communication Services·Internet Content & Information
0.43%
of portfolio
Number of shares
908,910 sh
Holdings current value
$523.86M
Avg closing price
$530.96
+24.1%
Last action
Trimmed 19.6%
2025Q4
Current $659.15
58
C
COPCONOCOPHILLIPS
Energy·Oil & Gas E&P
0.41%
of portfolio
Number of shares
4,748,140 sh
Holdings current value
$498.65M
Avg closing price
$102.75
+21.0%
Last action
Added 34.8%
2025Q4
Current $124.37
59
A
AAPLAPPLE INC
Technology·Consumer Electronics
0.41%
of portfolio
Number of shares
2,217,600 sh
Holdings current value
$492.60M
Avg closing price
$178.30
+53.4%
Last action
Trimmed 12.9%
2025Q3
Current $273.43
60
C
CMECME GROUP INC
Financial Services·Financial Data & Stock Exchanges
0.40%
of portfolio
Number of shares
1,831,920 sh
Holdings current value
$485.99M
Avg closing price
$220.20
+29.6%
Last action
Trimmed 3.3%
2025Q4
Current $285.47
61
J
JBLJABIL INC
Technology·Electronic Components
0.38%
of portfolio
Number of shares
3,385,760 sh
Holdings current value
$460.70M
Avg closing price
$134.15
+152.4%
Last action
Added 0.4%
2025Q4
Current $338.53
62
C
CATCATERPILLAR INC
Industrials·Farm & Heavy Construction Machinery
0.38%
of portfolio
Number of shares
1,379,485 sh
Holdings current value
$454.95M
Avg closing price
$366.43
+127.9%
Last action
Trimmed 22.1%
2025Q4
Current $835.24
63
H
HPEHEWLETT PACKARD ENTERPRISE C
Technology·Communication Equipment
0.36%
of portfolio
Number of shares
27,968,950 sh
Holdings current value
$431.56M
Avg closing price
$17.73
+57.5%
Last action
Trimmed 5.7%
2025Q4
Current $27.93
64
W
WHRWHIRLPOOL CORP
Consumer Cyclical·Furnishings, Fixtures & Appliances
0.34%
of portfolio
Number of shares
4,619,526 sh
Holdings current value
$416.36M
Avg closing price
$119.33
-54.6%
Last action
Trimmed 9.7%
2025Q4
Current $54.20
65
B
BACBK OF AMERICA CORP
Financial Services·Banks - Diversified
0.34%
of portfolio
Number of shares
9,922,932 sh
Holdings current value
$414.08M
Avg closing price
$38.45
+36.5%
Last action
Added 0.8%
2025Q4
Current $52.47
66
P
PYPLPAYPAL HLDGS INC
Financial Services·Credit Services
0.32%
of portfolio
Number of shares
5,973,810 sh
Holdings current value
$389.79M
Avg closing price
$63.90
-22.1%
Last action
Added 33.2%
2025Q4
Current $49.75
67
G
GLWCORNING INC
Technology·Electronic Components
0.31%
of portfolio
Number of shares
8,251,772 sh
Holdings current value
$377.77M
Avg closing price
$32.96
+414.3%
Last action
Trimmed 5.3%
2025Q4
Current $169.50
68
K
KMXCARMAX INC
Consumer Cyclical·Auto & Truck Dealerships
0.31%
of portfolio
Number of shares
4,769,306 sh
Holdings current value
$371.62M
Avg closing price
$87.11
-55.7%
Last action
Trimmed 3.9%
2025Q4
Current $38.55
69
P
PGRPROGRESSIVE CORP
Financial Services·Insurance - Property & Casualty
0.31%
of portfolio
Number of shares
1,310,760 sh
Holdings current value
$370.96M
Avg closing price
$208.11
-1.3%
Last action
Trimmed 8.1%
2025Q4
Current $205.33
70
B
BNTXBIONTECH SEADR
Healthcare·Biotechnology
0.30%
of portfolio
Number of shares
4,046,425 sh
Holdings current value
$368.47M
Avg closing price
$92.25
+14.4%
Last action
Trimmed 1.7%
2025Q4
Current $105.56
71
A
AMATAPPLIED MATLS INC
Technology·Semiconductor Equipment & Materials
0.29%
of portfolio
Number of shares
2,454,370 sh
Holdings current value
$356.18M
Avg closing price
$206.23
+95.9%
Last action
Trimmed 12.5%
2025Q4
Current $403.91
72
E
ERICERICSSONADR
Technology·Communication Equipment
0.29%
of portfolio
Number of shares
45,813,999 sh
Holdings current value
$355.52M
Avg closing price
$5.78
+95.9%
Last action
Added 3.9%
2025Q4
Current $11.32
73
A
ASMLASML HOLDING N V
Technology·Semiconductor Equipment & Materials
0.29%
of portfolio
Number of shares
530,609 sh
Holdings current value
$351.60M
Avg closing price
$970.47
+46.1%
Last action
Trimmed 5.5%
2025Q4
Current $1418
74
U
UNPUNION PAC CORP
Industrials·Railroads
0.29%
of portfolio
Number of shares
1,483,680 sh
Holdings current value
$350.50M
Avg closing price
$245.93
+10.3%
Last action
Trimmed 5.9%
2025Q4
Current $271.26
75
C
CSCOCISCO SYS INC
Technology·Communication Equipment
0.28%
of portfolio
Number of shares
5,524,530 sh
Holdings current value
$340.92M
Avg closing price
$49.91
+77.5%
Last action
Trimmed 6.9%
2025Q4
Current $88.59

Portfolio heatmap

Box size = % of portfolio · color = return since filing
LLY
10.09% · +11.1%
AMGN
3.19% · +11.9%
BSX
3.04% · -34.9%
MSFT
2.82% · +10.8%
KLAC
2.74% · +167.1%
MU
2.68% · +454.4%
AZN
2.47% · +161.6%
FDX
2.40% · +61.1%
BABA
2.25% · -0.4%
GOOGL
2.10% · +119.1%
TXN
2.08% · +57.1%
SONY
1.97% · -19.3%
NVDA
1.84% · +84.2%
BIIB
1.80% · +37.3%
ADBE
1.72% · -37.7%
TSLA
1.52% · +44.2%
INTC
1.45% · +194.1%
GOOG
1.41% · +116.2%
LUV
1.38% · +12.4%
WFC
1.30% · +12.1%
ORCL
1.25% · +26.1%
UAL
1.24% · +32.2%
TJX
1.18% · +30.0%
BMY
1.16% · -3.2%

Sector exposure

Share of dollar value across the latest reported portfolio. Unclassified positions excluded.
  • Healthcare55 pos$36.00B31.0%
  • Technology74 pos$33.38B28.7%
  • Industrials56 pos$13.66B11.8%
  • Consumer Cyclical35 pos$10.96B9.4%
  • Financial Services23 pos$10.92B9.4%
  • Communication Services21 pos$7.45B6.4%
  • Energy9 pos$1.87B1.6%
  • Consumer Defensive13 pos$1.28B1.1%
  • Basic Materials10 pos$710.6M0.6%
  • Real Estate4 pos$26.7M0.0%
(3.9% unclassified, excluded from %)