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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 · 2024Q3
1 / 5
75 of 336
1
L
LLYLILLY ELI & CO
Healthcare·Drug Manufacturers - General
11.52%
of portfolio
Number of shares
17,690,508 sh
Holdings current value
$15.67B
Avg closing price
$777.96
+18.0%
Last action
Trimmed 8.0%
2025Q4
Current $917.65
2
A
AMGNAMGEN INC
Healthcare·Drug Manufacturers - General
3.38%
of portfolio
Number of shares
14,255,941 sh
Holdings current value
$4.59B
Avg closing price
$284.32
+22.6%
Last action
Trimmed 5.3%
2025Q4
Current $348.62
3
M
MSFTMICROSOFT CORP
Technology·Software - Infrastructure
3.12%
of portfolio
Number of shares
9,847,015 sh
Holdings current value
$4.24B
Avg closing price
$420.96
-1.2%
Last action
Trimmed 10.1%
2025Q4
Current $415.75
4
K
KLACKLA CORP
Technology·Semiconductor Equipment & Materials
3.02%
of portfolio
Number of shares
5,301,519 sh
Holdings current value
$4.11B
Avg closing price
$698.57
+159.9%
Last action
Trimmed 11.1%
2025Q4
Current $1815
5
M
MUMICRON TECHNOLOGY INC
Technology·Semiconductors
2.87%
of portfolio
Number of shares
37,631,860 sh
Holdings current value
$3.90B
Avg closing price
$117.81
+308.9%
Last action
Trimmed 11.4%
2025Q4
Current $481.72
6
F
FDXFEDEX CORP
Industrials·Integrated Freight & Logistics
2.56%
of portfolio
Number of shares
12,709,330 sh
Holdings current value
$3.48B
Avg closing price
$289.74
+35.5%
Last action
Trimmed 6.8%
2025Q4
Current $392.69
7
A
AZNASTRAZENECA PLCADR
Healthcare·Drug Manufacturers - General
2.40%
of portfolio
Number of shares
41,980,045 sh
Holdings current value
$3.27B
Avg closing price
$67.78
+183.7%
Last action
Trimmed 6.6%
2025Q4
Current $192.30
8
B
BSXBOSTON SCIENTIFIC CORP
Healthcare·Medical Devices
2.33%
of portfolio
Number of shares
37,826,500 sh
Holdings current value
$3.17B
Avg closing price
$68.49
-4.1%
Last action
Trimmed 5.0%
2025Q4
Current $65.69
9
B
BIIBBIOGEN INC
Healthcare·Drug Manufacturers - General
2.33%
of portfolio
Number of shares
16,315,079 sh
Holdings current value
$3.16B
Avg closing price
$215.75
-12.9%
Last action
Trimmed 1.2%
2025Q4
Current $187.88
10
G
GOOGLALPHABET INC
Communication Services·Internet Content & Information
2.28%
of portfolio
Number of shares
18,692,890 sh
Holdings current value
$3.10B
Avg closing price
$151.47
+123.7%
Last action
Trimmed 3.4%
2025Q4
Current $338.89
11
T
TXNTEXAS INSTRS INC
Technology·Semiconductors
2.26%
of portfolio
Number of shares
14,903,760 sh
Holdings current value
$3.08B
Avg closing price
$174.21
+62.0%
Last action
Trimmed 7.1%
2025Q4
Current $282.23
12
A
ADBEADOBE SYSTEMS INCORPORATED
Technology·Software - Application
2.16%
of portfolio
Number of shares
5,681,096 sh
Holdings current value
$2.94B
Avg closing price
$504.60
-52.6%
Last action
Trimmed 3.1%
2025Q4
Current $238.98
13
N
NVDANVIDIA CORPORATION
Technology·Semiconductors
1.92%
of portfolio
Number of shares
21,468,280 sh
Holdings current value
$2.61B
Avg closing price
$206.69
-3.4%
Last action
Trimmed 6.7%
2025Q4
Current $199.64
14
B
BABAALIBABA GROUP HLDG LTDADR
Consumer Cyclical·Internet Retail
1.71%
of portfolio
Number of shares
21,917,552 sh
Holdings current value
$2.33B
Avg closing price
$72.71
+81.1%
Last action
Trimmed 4.4%
2025Q4
Current $131.70
15
T
TSLATESLA INC
Consumer Cyclical·Auto Manufacturers
1.68%
of portfolio
Number of shares
8,718,685 sh
Holdings current value
$2.28B
Avg closing price
$175.79
+112.6%
Last action
Trimmed 3.4%
2025Q4
Current $373.72
16
O
ORCLORACLE CORP
Technology·Software - Infrastructure
1.58%
of portfolio
Number of shares
12,633,550 sh
Holdings current value
$2.15B
Avg closing price
$128.98
+36.7%
Last action
Trimmed 10.6%
2025Q4
Current $176.28
17
G
GOOGALPHABET INC
Communication Services·Internet Content & Information
1.52%
of portfolio
Number of shares
12,392,730 sh
Holdings current value
$2.07B
Avg closing price
$152.26
+121.8%
Last action
Trimmed 2.9%
2025Q4
Current $337.75
18
S
SONYSONY GROUP CORPORATIONADR
Technology·Consumer Electronics
1.51%
of portfolio
Number of shares
21,270,923 sh
Holdings current value
$2.05B
Avg closing price
$34.63
-40.8%
Last action
Trimmed 22.4%
2025Q4
Current $20.49
19
I
INTCINTEL CORP
Technology·Semiconductors
1.33%
of portfolio
Number of shares
77,267,112 sh
Holdings current value
$1.81B
Avg closing price
$43.00
+55.3%
Last action
Trimmed 4.1%
2025Q4
Current $66.78
20
W
WFCWELLS FARGO CO NEW
Financial Services·Banks - Diversified
1.33%
of portfolio
Number of shares
32,015,964 sh
Holdings current value
$1.81B
Avg closing price
$57.96
+38.9%
Last action
Trimmed 17.0%
2025Q4
Current $80.51
21
N
NTAPNETAPP INC
Technology·Software - Infrastructure
1.22%
of portfolio
Number of shares
13,427,406 sh
Holdings current value
$1.66B
Avg closing price
$104.97
+3.3%
Last action
Trimmed 4.0%
2025Q4
Current $108.40
22
T
TMOTHERMO FISHER SCIENTIFIC INC
Healthcare·Diagnostics & Research
1.17%
of portfolio
Number of shares
2,574,877 sh
Holdings current value
$1.59B
Avg closing price
$574.72
-18.8%
Last action
Trimmed 8.7%
2025Q4
Current $466.70
23
R
ROSTROSS STORES INC
Consumer Cyclical·Apparel Retail
1.17%
of portfolio
Number of shares
10,535,967 sh
Holdings current value
$1.59B
Avg closing price
$146.66
+54.7%
Last action
Trimmed 6.6%
2025Q4
Current $226.92
24
L
LUVSOUTHWEST AIRLS CO
Industrials·Airlines
1.08%
of portfolio
Number of shares
49,669,524 sh
Holdings current value
$1.47B
Avg closing price
$29.26
+29.0%
Last action
Trimmed 1.2%
2025Q4
Current $37.75
25
R
RJFRAYMOND JAMES FINL INC
Financial Services·Asset Management
1.08%
of portfolio
Number of shares
11,976,412 sh
Holdings current value
$1.47B
Avg closing price
$129.16
+18.8%
Last action
Trimmed 2.5%
2025Q4
Current $153.41
26
T
TJXTJX COS INC NEW
Consumer Cyclical·Apparel Retail
1.06%
of portfolio
Number of shares
12,306,667 sh
Holdings current value
$1.45B
Avg closing price
$101.42
+56.1%
Last action
Trimmed 6.0%
2025Q4
Current $158.35
27
Y
Y2573F102FLEX LTD
1.06%
of portfolio
Number of shares
43,191,034 sh
Holdings current value
$1.44B
Avg closing price
$28.61
Last action
Trimmed 6.3%
2025Q4
Current —
28
N
NVSNOVARTIS AGADR
Healthcare·Drug Manufacturers - General
1.02%
of portfolio
Number of shares
12,008,055 sh
Holdings current value
$1.38B
Avg closing price
$96.77
+52.4%
Last action
Trimmed 12.8%
2025Q4
Current $147.48
29
U
UALUNITED AIRLS HLDGS INC
Industrials·Airlines
0.99%
of portfolio
Number of shares
23,571,002 sh
Holdings current value
$1.34B
Avg closing price
$47.88
+90.6%
Last action
Trimmed 7.9%
2025Q4
Current $91.25
30
B
BMRNBIOMARIN PHARMACEUTICAL INC
Healthcare·Biotechnology
0.98%
of portfolio
Number of shares
18,867,435 sh
Holdings current value
$1.33B
Avg closing price
$87.25
-38.1%
Last action
Trimmed 3.5%
2025Q4
Current $53.98
31
A
ACMAECOM
Industrials·Engineering & Construction
0.95%
of portfolio
Number of shares
12,511,207 sh
Holdings current value
$1.29B
Avg closing price
$98.08
-18.0%
Last action
Trimmed 1.7%
2025Q4
Current $80.46
32
B
BIDUBAIDU INCADR
Communication Services·Internet Content & Information
0.94%
of portfolio
Number of shares
12,123,856 sh
Holdings current value
$1.28B
Avg closing price
$102.32
+18.8%
Last action
Trimmed 7.7%
2025Q4
Current $121.53
33
B
BMYBRISTOL-MYERS SQUIBB CO
Healthcare·Drug Manufacturers - General
0.89%
of portfolio
Number of shares
23,369,570 sh
Holdings current value
$1.21B
Avg closing price
$54.14
+9.0%
Last action
Added 13.5%
2025Q4
Current $59.02
34
J
JPMJPMORGAN CHASE & CO
Financial Services·Banks - Diversified
0.88%
of portfolio
Number of shares
5,647,265 sh
Holdings current value
$1.19B
Avg closing price
$200.57
+55.4%
Last action
Trimmed 3.9%
2025Q4
Current $311.69
35
D
DALDELTA AIR LINES INC DEL
Industrials·Airlines
0.84%
of portfolio
Number of shares
22,404,523 sh
Holdings current value
$1.14B
Avg closing price
$47.87
+42.8%
Last action
Trimmed 3.0%
2025Q4
Current $68.37
36
O
ONCBEIGENE LTDADR
Healthcare·Biotechnology
0.82%
of portfolio
Number of shares
4,974,289 sh
Holdings current value
$1.12B
Avg closing price
$157.63
+90.2%
Last action
Trimmed 2.0%
2025Q4
Current $299.81
37
V
VVISA INC
Financial Services·Credit Services
0.81%
of portfolio
Number of shares
4,017,070 sh
Holdings current value
$1.10B
Avg closing price
$285.77
+8.1%
Last action
Trimmed 1.4%
2025Q4
Current $308.88
38
H
HESHESS CORP
0.79%
of portfolio
Number of shares
7,914,945 sh
Holdings current value
$1.07B
Avg closing price
$151.48
Last action
Exited
2025Q3
Current —
39
I
INTUINTUIT
Technology·Software - Application
0.75%
of portfolio
Number of shares
1,647,036 sh
Holdings current value
$1.02B
Avg closing price
$650.00
-41.0%
Last action
Trimmed 3.8%
2025Q4
Current $383.30
40
V
V7780T103ROYAL CARIBBEAN GROUP
0.62%
of portfolio
Number of shares
4,781,143 sh
Holdings current value
$847.98M
Avg closing price
$139.01
Last action
Trimmed 6.8%
2025Q4
Current —
41
Q
QCOMQUALCOMM INC
Technology·Semiconductors
0.61%
of portfolio
Number of shares
4,885,653 sh
Holdings current value
$830.81M
Avg closing price
$169.30
-20.9%
Last action
Trimmed 2.5%
2025Q4
Current $133.95
42
X
XOMEXXON MOBIL CORP
Energy·Oil & Gas Integrated
0.61%
of portfolio
Number of shares
7,084,552 sh
Holdings current value
$830.45M
Avg closing price
$115.12
+30.8%
Last action
Trimmed 6.4%
2025Q4
Current $150.53
43
A
ADIANALOG DEVICES INC
Technology·Semiconductors
0.61%
of portfolio
Number of shares
3,578,150 sh
Holdings current value
$823.58M
Avg closing price
$197.79
+104.2%
Last action
Trimmed 3.7%
2025Q4
Current $403.88
44
A
AMZNAMAZON COM INC
Consumer Cyclical·Internet Retail
0.60%
of portfolio
Number of shares
4,405,650 sh
Holdings current value
$820.90M
Avg closing price
$206.84
+23.3%
Last action
Added 53.9%
2025Q4
Current $255.08
45
H
HPQHP INC
Technology·Computer Hardware
0.59%
of portfolio
Number of shares
22,340,440 sh
Holdings current value
$801.35M
Avg closing price
$30.50
-34.0%
Last action
Trimmed 2.1%
2025Q4
Current $20.14
46
E
ELANELANCO ANIMAL HEALTH INC
Healthcare·Drug Manufacturers - Specialty & Generic
0.57%
of portfolio
Number of shares
52,575,502 sh
Holdings current value
$772.33M
Avg closing price
$16.22
+38.0%
Last action
Trimmed 6.6%
2025Q4
Current $22.39
47
T
TDGTRANSDIGM GROUP INC
Industrials·Aerospace & Defense
0.54%
of portfolio
Number of shares
513,194 sh
Holdings current value
$732.39M
Avg closing price
$1258
-7.3%
Last action
Trimmed 25.4%
2025Q4
Current $1166
48
M
MATMATTEL INC
Consumer Cyclical·Leisure
0.53%
of portfolio
Number of shares
37,891,101 sh
Holdings current value
$721.83M
Avg closing price
$19.81
-25.5%
Last action
Trimmed 3.9%
2025Q4
Current $14.76
49
J
JJACOBS SOLUTIONS INC
Industrials·Engineering & Construction
0.51%
of portfolio
Number of shares
5,271,282 sh
Holdings current value
$690.01M
Avg closing price
$153.28
-16.8%
Last action
Trimmed 1.2%
2025Q4
Current $127.58
50
A
AALAMERICAN AIRLS GROUP INC
Industrials·Airlines
0.47%
of portfolio
Number of shares
57,339,666 sh
Holdings current value
$644.50M
Avg closing price
$14.43
-18.4%
Last action
Trimmed 1.1%
2025Q4
Current $11.78
51
H
HPEHEWLETT PACKARD ENTERPRISE C
Technology·Communication Equipment
0.47%
of portfolio
Number of shares
31,354,856 sh
Holdings current value
$641.52M
Avg closing price
$17.73
+57.5%
Last action
Trimmed 5.1%
2025Q4
Current $27.93
52
M
MRSHMARSH & MCLENNAN COS INC
Financial Services·Insurance Brokers
0.47%
of portfolio
Number of shares
2,868,741 sh
Holdings current value
$639.99M
Avg closing price
$205.98
-15.5%
Last action
Trimmed 31.2%
2025Q4
Current $174.01
53
N
NTRSNORTHERN TR CORP
Financial Services·Asset Management
0.47%
of portfolio
Number of shares
7,085,117 sh
Holdings current value
$637.87M
Avg closing price
$94.95
+74.2%
Last action
Trimmed 11.6%
2025Q4
Current $165.39
54
D
DISDISNEY WALT CO
Communication Services·Entertainment
0.46%
of portfolio
Number of shares
6,435,934 sh
Holdings current value
$619.07M
Avg closing price
$122.40
-15.3%
Last action
Trimmed 0.2%
2025Q4
Current $103.65
55
G
GSKGSK PLCADR
Healthcare·Drug Manufacturers - General
0.45%
of portfolio
Number of shares
14,853,755 sh
Holdings current value
$607.22M
Avg closing price
$38.78
+43.5%
Last action
Trimmed 4.1%
2025Q4
Current $55.63
56
C
CATCATERPILLAR INC
Industrials·Farm & Heavy Construction Machinery
0.43%
of portfolio
Number of shares
1,485,456 sh
Holdings current value
$580.99M
Avg closing price
$366.43
+127.9%
Last action
Trimmed 20.8%
2025Q4
Current $835.24
57
A
AMATAPPLIED MATLS INC
Technology·Semiconductor Equipment & Materials
0.41%
of portfolio
Number of shares
2,742,283 sh
Holdings current value
$554.08M
Avg closing price
$206.23
+95.9%
Last action
Trimmed 11.3%
2025Q4
Current $403.91
58
Z
ZBHZIMMER BIOMET HOLDINGS INC
Healthcare·Medical Devices
0.39%
of portfolio
Number of shares
4,971,380 sh
Holdings current value
$536.66M
Avg closing price
$131.74
-29.8%
Last action
Trimmed 4.8%
2025Q4
Current $92.44
59
B
BNTXBIONTECH SEADR
Healthcare·Biotechnology
0.39%
of portfolio
Number of shares
4,516,518 sh
Holdings current value
$536.43M
Avg closing price
$92.25
+14.4%
Last action
Trimmed 1.5%
2025Q4
Current $105.56
60
A
AAPLAPPLE INC
Technology·Consumer Electronics
0.39%
of portfolio
Number of shares
2,260,500 sh
Holdings current value
$526.70M
Avg closing price
$178.30
+53.4%
Last action
Trimmed 12.7%
2025Q3
Current $273.43
61
W
WHRWHIRLPOOL CORP
Consumer Cyclical·Furnishings, Fixtures & Appliances
0.38%
of portfolio
Number of shares
4,836,290 sh
Holdings current value
$517.48M
Avg closing price
$119.33
-54.6%
Last action
Trimmed 9.3%
2025Q4
Current $54.20
62
P
PYPLPAYPAL HLDGS INC
Financial Services·Credit Services
0.35%
of portfolio
Number of shares
6,015,816 sh
Holdings current value
$469.41M
Avg closing price
$63.90
-22.1%
Last action
Added 32.9%
2025Q4
Current $49.75
63
T
TXTTEXTRON INC
Industrials·Aerospace & Defense
0.34%
of portfolio
Number of shares
5,280,355 sh
Holdings current value
$467.73M
Avg closing price
$95.93
-5.8%
Last action
Trimmed 25.2%
2025Q4
Current $90.37
64
A
ASMLASML HOLDING N V
Technology·Semiconductor Equipment & Materials
0.34%
of portfolio
Number of shares
553,209 sh
Holdings current value
$460.96M
Avg closing price
$970.47
+46.1%
Last action
Trimmed 5.3%
2025Q4
Current $1418
65
C
COPCONOCOPHILLIPS
Energy·Oil & Gas E&P
0.33%
of portfolio
Number of shares
4,320,905 sh
Holdings current value
$454.90M
Avg closing price
$102.75
+21.0%
Last action
Added 39.6%
2025Q4
Current $124.37
66
J
JBLJABIL INC
Technology·Electronic Components
0.33%
of portfolio
Number of shares
3,692,560 sh
Holdings current value
$442.48M
Avg closing price
$134.15
+152.4%
Last action
Added 0.3%
2025Q4
Current $338.53
67
M
METAMETA PLATFORMS INC
Communication Services·Internet Content & Information
0.30%
of portfolio
Number of shares
723,400 sh
Holdings current value
$414.10M
Avg closing price
$530.96
+24.1%
Last action
Trimmed 23.5%
2025Q4
Current $659.15
68
C
CMECME GROUP INC
Financial Services·Financial Data & Stock Exchanges
0.30%
of portfolio
Number of shares
1,861,690 sh
Holdings current value
$410.78M
Avg closing price
$220.20
+29.6%
Last action
Trimmed 3.2%
2025Q4
Current $285.47
69
K
KMXCARMAX INC
Consumer Cyclical·Auto & Truck Dealerships
0.30%
of portfolio
Number of shares
5,283,834 sh
Holdings current value
$408.86M
Avg closing price
$87.11
-55.7%
Last action
Trimmed 3.5%
2025Q4
Current $38.55
70
B
BACBK OF AMERICA CORP
Financial Services·Banks - Diversified
0.30%
of portfolio
Number of shares
10,228,232 sh
Holdings current value
$405.86M
Avg closing price
$38.45
+36.5%
Last action
Added 0.8%
2025Q4
Current $52.47
71
U
UNPUNION PAC CORP
Industrials·Railroads
0.29%
of portfolio
Number of shares
1,605,010 sh
Holdings current value
$395.60M
Avg closing price
$245.93
+10.3%
Last action
Trimmed 5.4%
2025Q4
Current $271.26
72
U
UPSUNITED PARCEL SERVICE INC
Industrials·Integrated Freight & Logistics
0.29%
of portfolio
Number of shares
2,857,715 sh
Holdings current value
$389.62M
Avg closing price
$148.63
-27.5%
Last action
Trimmed 3.9%
2025Q4
Current $107.72
73
O
OLEDUNIVERSAL DISPLAY CORP
Technology·Electronic Components
0.29%
of portfolio
Number of shares
1,849,382 sh
Holdings current value
$388.19M
Avg closing price
$165.26
-40.8%
Last action
Trimmed 3.2%
2025Q4
Current $97.78
74
G
GLWCORNING INC
Technology·Electronic Components
0.28%
of portfolio
Number of shares
8,558,519 sh
Holdings current value
$386.42M
Avg closing price
$32.96
+414.3%
Last action
Trimmed 5.1%
2025Q4
Current $169.50
75
R
RYTMRHYTHM PHARMACEUTICALS INC
Healthcare·Biotechnology
0.28%
of portfolio
Number of shares
7,216,911 sh
Holdings current value
$378.09M
Avg closing price
$43.33
+96.7%
Last action
Trimmed 9.8%
2025Q4
Current $85.21

Portfolio heatmap

Box size = % of portfolio · color = return since filing
LLY
11.52% · +3.6%
AMGN
3.38% · +8.2%
MSFT
3.12% · -3.4%
KLAC
3.02% · +134.4%
MU
2.87% · +364.5%
FDX
2.56% · +43.5%
AZN
2.40% · +146.8%
BSX
2.33% · -21.6%
BIIB
2.33% · -3.1%
GOOGL
2.28% · +104.3%
TXN
2.26% · +36.6%
ADBE
2.16% · -53.8%
NVDA
1.92% · +64.4%
BABA
1.71% · +24.1%
TSLA
1.68% · +42.8%
ORCL
1.58% · +3.5%
GOOG
1.52% · +102.0%
SONY
1.51% · -78.8%
INTC
1.33% · +184.7%
WFC
1.33% · +42.5%
NTAP
1.22% · -12.2%
TMO
1.17% · -24.6%
ROST
1.17% · +50.8%
LUV
1.08% · +27.4%

Sector exposure

Share of dollar value across the latest reported portfolio. Unclassified positions excluded.
  • Healthcare58 pos$41.81B32.0%
  • Technology71 pos$40.31B30.8%
  • Industrials56 pos$15.19B11.6%
  • Consumer Cyclical35 pos$11.22B8.6%
  • Financial Services23 pos$9.97B7.6%
  • Communication Services19 pos$8.24B6.3%
  • Energy8 pos$1.93B1.5%
  • Consumer Defensive13 pos$1.14B0.9%
  • Basic Materials8 pos$986.8M0.8%
  • Real Estate2 pos$18.1M0.0%
(3.8% unclassified, excluded from %)