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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 · 2024Q4
1 / 5
75 of 329
1
L
LLYLILLY ELI & CO
Healthcare·Drug Manufacturers - General
10.02%
of portfolio
Number of shares
16,756,654 sh
Holdings current value
$12.94B
Avg closing price
$777.96
+18.0%
Last action
Trimmed 8.4%
2025Q4
Current $917.65
2
M
MSFTMICROSOFT CORP
Technology·Software - Infrastructure
3.12%
of portfolio
Number of shares
9,548,640 sh
Holdings current value
$4.02B
Avg closing price
$420.96
-1.2%
Last action
Trimmed 10.3%
2025Q4
Current $415.75
3
F
FDXFEDEX CORP
Industrials·Integrated Freight & Logistics
2.70%
of portfolio
Number of shares
12,390,945 sh
Holdings current value
$3.49B
Avg closing price
$289.74
+35.5%
Last action
Trimmed 7.0%
2025Q4
Current $392.69
4
A
AMGNAMGEN INC
Healthcare·Drug Manufacturers - General
2.62%
of portfolio
Number of shares
13,002,125 sh
Holdings current value
$3.39B
Avg closing price
$284.32
+22.6%
Last action
Trimmed 5.8%
2025Q4
Current $348.62
5
B
BSXBOSTON SCIENTIFIC CORP
Healthcare·Medical Devices
2.55%
of portfolio
Number of shares
36,929,666 sh
Holdings current value
$3.30B
Avg closing price
$68.49
-4.1%
Last action
Trimmed 5.2%
2025Q4
Current $65.69
6
K
KLACKLA CORP
Technology·Semiconductor Equipment & Materials
2.53%
of portfolio
Number of shares
5,184,569 sh
Holdings current value
$3.27B
Avg closing price
$698.57
+159.9%
Last action
Trimmed 11.3%
2025Q4
Current $1815
7
G
GOOGLALPHABET INC
Communication Services·Internet Content & Information
2.49%
of portfolio
Number of shares
17,008,935 sh
Holdings current value
$3.22B
Avg closing price
$151.47
+123.7%
Last action
Trimmed 3.7%
2025Q4
Current $338.89
8
M
MUMICRON TECHNOLOGY INC
Technology·Semiconductors
2.45%
of portfolio
Number of shares
37,596,461 sh
Holdings current value
$3.16B
Avg closing price
$117.81
+308.9%
Last action
Trimmed 11.4%
2025Q4
Current $481.72
9
T
TSLATESLA INC
Consumer Cyclical·Auto Manufacturers
2.36%
of portfolio
Number of shares
7,555,735 sh
Holdings current value
$3.05B
Avg closing price
$175.79
+112.6%
Last action
Trimmed 3.9%
2025Q4
Current $373.72
10
N
NVDANVIDIA CORPORATION
Technology·Semiconductors
2.21%
of portfolio
Number of shares
21,292,680 sh
Holdings current value
$2.86B
Avg closing price
$206.69
-3.4%
Last action
Trimmed 6.7%
2025Q4
Current $199.64
11
T
TXNTEXAS INSTRS INC
Technology·Semiconductors
2.09%
of portfolio
Number of shares
14,370,519 sh
Holdings current value
$2.69B
Avg closing price
$174.21
+62.0%
Last action
Trimmed 7.4%
2025Q4
Current $282.23
12
A
AZNASTRAZENECA PLCADR
Healthcare·Drug Manufacturers - General
2.08%
of portfolio
Number of shares
41,019,527 sh
Holdings current value
$2.69B
Avg closing price
$67.78
+183.7%
Last action
Trimmed 6.7%
2025Q4
Current $192.30
13
B
BIIBBIOGEN INC
Healthcare·Drug Manufacturers - General
1.90%
of portfolio
Number of shares
16,046,209 sh
Holdings current value
$2.45B
Avg closing price
$215.75
-12.9%
Last action
Trimmed 1.2%
2025Q4
Current $187.88
14
A
ADBEADOBE SYSTEMS INCORPORATED
Technology·Software - Application
1.89%
of portfolio
Number of shares
5,487,401 sh
Holdings current value
$2.44B
Avg closing price
$504.60
-52.6%
Last action
Trimmed 3.2%
2025Q4
Current $238.98
15
U
UALUNITED AIRLS HLDGS INC
Industrials·Airlines
1.71%
of portfolio
Number of shares
22,679,475 sh
Holdings current value
$2.20B
Avg closing price
$47.88
+90.6%
Last action
Trimmed 8.2%
2025Q4
Current $91.25
16
G
GOOGALPHABET INC
Communication Services·Internet Content & Information
1.68%
of portfolio
Number of shares
11,379,775 sh
Holdings current value
$2.17B
Avg closing price
$152.26
+121.8%
Last action
Trimmed 3.1%
2025Q4
Current $337.75
17
S
SONYSONY GROUP CORPORATIONADR
Technology·Consumer Electronics
1.67%
of portfolio
Number of shares
101,995,855 sh
Holdings current value
$2.16B
Avg closing price
$34.63
-40.8%
Last action
Trimmed 5.7%
2025Q4
Current $20.49
18
O
ORCLORACLE CORP
Technology·Software - Infrastructure
1.57%
of portfolio
Number of shares
12,156,455 sh
Holdings current value
$2.03B
Avg closing price
$128.98
+36.7%
Last action
Trimmed 11.0%
2025Q4
Current $176.28
19
B
BABAALIBABA GROUP HLDG LTDADR
Consumer Cyclical·Internet Retail
1.44%
of portfolio
Number of shares
21,955,107 sh
Holdings current value
$1.86B
Avg closing price
$72.71
+81.1%
Last action
Trimmed 4.4%
2025Q4
Current $131.70
20
W
WFCWELLS FARGO CO NEW
Financial Services·Banks - Diversified
1.39%
of portfolio
Number of shares
25,539,184 sh
Holdings current value
$1.79B
Avg closing price
$57.96
+38.9%
Last action
Trimmed 20.5%
2025Q4
Current $80.51
21
R
RJFRAYMOND JAMES FINL INC
Financial Services·Asset Management
1.38%
of portfolio
Number of shares
11,469,156 sh
Holdings current value
$1.78B
Avg closing price
$129.16
+18.8%
Last action
Trimmed 2.6%
2025Q4
Current $153.41
22
L
LUVSOUTHWEST AIRLS CO
Industrials·Airlines
1.27%
of portfolio
Number of shares
48,900,053 sh
Holdings current value
$1.64B
Avg closing price
$29.26
+29.0%
Last action
Trimmed 1.2%
2025Q4
Current $37.75
23
R
ROSTROSS STORES INC
Consumer Cyclical·Apparel Retail
1.21%
of portfolio
Number of shares
10,364,825 sh
Holdings current value
$1.57B
Avg closing price
$146.66
+54.7%
Last action
Trimmed 6.7%
2025Q4
Current $226.92
24
I
INTCINTEL CORP
Technology·Semiconductors
1.20%
of portfolio
Number of shares
77,049,937 sh
Holdings current value
$1.54B
Avg closing price
$43.00
+55.3%
Last action
Trimmed 4.1%
2025Q4
Current $66.78
25
Y
Y2573F102FLEX LTD
1.17%
of portfolio
Number of shares
39,190,841 sh
Holdings current value
$1.50B
Avg closing price
$28.61
Last action
Trimmed 6.9%
2025Q4
Current —
26
T
TJXTJX COS INC NEW
Consumer Cyclical·Apparel Retail
1.12%
of portfolio
Number of shares
12,003,367 sh
Holdings current value
$1.45B
Avg closing price
$101.42
+56.1%
Last action
Trimmed 6.1%
2025Q4
Current $158.35
27
N
NTAPNETAPP INC
Technology·Software - Infrastructure
1.10%
of portfolio
Number of shares
12,220,339 sh
Holdings current value
$1.42B
Avg closing price
$104.97
+3.3%
Last action
Trimmed 4.4%
2025Q4
Current $108.40
28
D
DALDELTA AIR LINES INC DEL
Industrials·Airlines
1.03%
of portfolio
Number of shares
21,932,007 sh
Holdings current value
$1.33B
Avg closing price
$47.87
+42.8%
Last action
Trimmed 3.1%
2025Q4
Current $68.37
29
T
TMOTHERMO FISHER SCIENTIFIC INC
Healthcare·Diagnostics & Research
1.01%
of portfolio
Number of shares
2,505,151 sh
Holdings current value
$1.30B
Avg closing price
$574.72
-18.8%
Last action
Trimmed 8.9%
2025Q4
Current $466.70
30
B
BMYBRISTOL-MYERS SQUIBB CO
Healthcare·Drug Manufacturers - General
1.00%
of portfolio
Number of shares
22,773,180 sh
Holdings current value
$1.29B
Avg closing price
$54.14
+9.0%
Last action
Added 13.9%
2025Q4
Current $59.02
31
J
JPMJPMORGAN CHASE & CO
Financial Services·Banks - Diversified
0.99%
of portfolio
Number of shares
5,319,450 sh
Holdings current value
$1.28B
Avg closing price
$200.57
+55.4%
Last action
Trimmed 4.2%
2025Q4
Current $311.69
32
V
VVISA INC
Financial Services·Credit Services
0.97%
of portfolio
Number of shares
3,964,780 sh
Holdings current value
$1.25B
Avg closing price
$285.77
+8.1%
Last action
Trimmed 1.4%
2025Q4
Current $308.88
33
A
ACMAECOM
Industrials·Engineering & Construction
0.94%
of portfolio
Number of shares
11,381,582 sh
Holdings current value
$1.22B
Avg closing price
$98.08
-18.0%
Last action
Trimmed 1.8%
2025Q4
Current $80.46
34
A
AMZNAMAZON COM INC
Consumer Cyclical·Internet Retail
0.93%
of portfolio
Number of shares
5,494,750 sh
Holdings current value
$1.21B
Avg closing price
$206.84
+23.3%
Last action
Added 39.0%
2025Q4
Current $255.08
35
B
BMRNBIOMARIN PHARMACEUTICAL INC
Healthcare·Biotechnology
0.93%
of portfolio
Number of shares
18,189,171 sh
Holdings current value
$1.20B
Avg closing price
$87.25
-38.1%
Last action
Trimmed 3.6%
2025Q4
Current $53.98
36
N
NVSNOVARTIS AGADR
Healthcare·Drug Manufacturers - General
0.83%
of portfolio
Number of shares
11,025,039 sh
Holdings current value
$1.07B
Avg closing price
$96.77
+52.4%
Last action
Trimmed 13.8%
2025Q4
Current $147.48
37
A
AALAMERICAN AIRLS GROUP INC
Industrials·Airlines
0.81%
of portfolio
Number of shares
60,225,707 sh
Holdings current value
$1.05B
Avg closing price
$14.43
-18.4%
Last action
Trimmed 1.1%
2025Q4
Current $11.78
38
H
HESHESS CORP
0.80%
of portfolio
Number of shares
7,768,296 sh
Holdings current value
$1.03B
Avg closing price
$151.48
Last action
Exited
2025Q3
Current —
39
B
BIDUBAIDU INCADR
Communication Services·Internet Content & Information
0.79%
of portfolio
Number of shares
12,114,236 sh
Holdings current value
$1.02B
Avg closing price
$102.32
+18.8%
Last action
Trimmed 7.7%
2025Q4
Current $121.53
40
V
V7780T103ROYAL CARIBBEAN GROUP
0.76%
of portfolio
Number of shares
4,268,658 sh
Holdings current value
$984.74M
Avg closing price
$139.01
Last action
Trimmed 7.5%
2025Q4
Current —
41
O
ONCBEIGENE LTDADR
Healthcare·Biotechnology
0.73%
of portfolio
Number of shares
5,098,904 sh
Holdings current value
$941.82M
Avg closing price
$157.63
+90.2%
Last action
Trimmed 1.9%
2025Q4
Current $299.81
42
I
INTUINTUIT
Technology·Software - Application
0.70%
of portfolio
Number of shares
1,440,875 sh
Holdings current value
$905.59M
Avg closing price
$650.00
-41.0%
Last action
Trimmed 4.3%
2025Q4
Current $383.30
43
G
GSKGSK PLCADR
Healthcare·Drug Manufacturers - General
0.66%
of portfolio
Number of shares
25,261,660 sh
Holdings current value
$854.35M
Avg closing price
$38.78
+43.5%
Last action
Trimmed 2.5%
2025Q4
Current $55.63
44
A
ADIANALOG DEVICES INC
Technology·Semiconductors
0.58%
of portfolio
Number of shares
3,523,385 sh
Holdings current value
$748.58M
Avg closing price
$197.79
+104.2%
Last action
Trimmed 3.8%
2025Q4
Current $403.88
45
H
HPQHP INC
Technology·Computer Hardware
0.55%
of portfolio
Number of shares
21,915,405 sh
Holdings current value
$715.10M
Avg closing price
$30.50
-34.0%
Last action
Trimmed 2.1%
2025Q4
Current $20.14
46
X
XOMEXXON MOBIL CORP
Energy·Oil & Gas Integrated
0.54%
of portfolio
Number of shares
6,522,990 sh
Holdings current value
$701.68M
Avg closing price
$115.12
+30.8%
Last action
Trimmed 6.9%
2025Q4
Current $150.53
47
D
DISDISNEY WALT CO
Communication Services·Entertainment
0.54%
of portfolio
Number of shares
6,296,234 sh
Holdings current value
$701.09M
Avg closing price
$122.40
-15.3%
Last action
Trimmed 0.2%
2025Q4
Current $103.65
48
N
NTRSNORTHERN TR CORP
Financial Services·Asset Management
0.53%
of portfolio
Number of shares
6,720,607 sh
Holdings current value
$688.86M
Avg closing price
$94.95
+74.2%
Last action
Trimmed 12.2%
2025Q4
Current $165.39
49
J
JJACOBS SOLUTIONS INC
Industrials·Engineering & Construction
0.53%
of portfolio
Number of shares
5,106,852 sh
Holdings current value
$682.38M
Avg closing price
$153.28
-16.8%
Last action
Trimmed 1.3%
2025Q4
Current $127.58
50
T
TDGTRANSDIGM GROUP INC
Industrials·Aerospace & Defense
0.50%
of portfolio
Number of shares
513,194 sh
Holdings current value
$650.36M
Avg closing price
$1258
-7.3%
Last action
Trimmed 25.4%
2025Q4
Current $1166
51
M
MATMATTEL INC
Consumer Cyclical·Leisure
0.50%
of portfolio
Number of shares
36,512,081 sh
Holdings current value
$647.36M
Avg closing price
$19.81
-25.5%
Last action
Trimmed 4.1%
2025Q4
Current $14.76
52
Q
QCOMQUALCOMM INC
Technology·Semiconductors
0.50%
of portfolio
Number of shares
4,167,852 sh
Holdings current value
$640.27M
Avg closing price
$169.30
-20.9%
Last action
Trimmed 2.9%
2025Q4
Current $133.95
53
E
ELANELANCO ANIMAL HEALTH INC
Healthcare·Drug Manufacturers - Specialty & Generic
0.48%
of portfolio
Number of shares
51,165,165 sh
Holdings current value
$619.61M
Avg closing price
$16.22
+38.0%
Last action
Trimmed 6.8%
2025Q4
Current $22.39
54
H
HPEHEWLETT PACKARD ENTERPRISE C
Technology·Communication Equipment
0.48%
of portfolio
Number of shares
28,902,400 sh
Holdings current value
$617.07M
Avg closing price
$17.73
+57.5%
Last action
Trimmed 5.5%
2025Q4
Current $27.93
55
M
MRSHMARSH & MCLENNAN COS INC
Financial Services·Insurance Brokers
0.45%
of portfolio
Number of shares
2,732,326 sh
Holdings current value
$580.37M
Avg closing price
$205.98
-15.5%
Last action
Trimmed 32.3%
2025Q4
Current $174.01
56
A
AAPLAPPLE INC
Technology·Consumer Electronics
0.44%
of portfolio
Number of shares
2,270,500 sh
Holdings current value
$568.58M
Avg closing price
$178.30
+53.4%
Last action
Trimmed 12.6%
2025Q3
Current $273.43
57
W
WHRWHIRLPOOL CORP
Consumer Cyclical·Furnishings, Fixtures & Appliances
0.41%
of portfolio
Number of shares
4,670,586 sh
Holdings current value
$534.69M
Avg closing price
$119.33
-54.6%
Last action
Trimmed 9.6%
2025Q4
Current $54.20
58
C
CATCATERPILLAR INC
Industrials·Farm & Heavy Construction Machinery
0.40%
of portfolio
Number of shares
1,424,446 sh
Holdings current value
$516.73M
Avg closing price
$366.43
+127.9%
Last action
Trimmed 21.5%
2025Q4
Current $835.24
59
J
JBLJABIL INC
Technology·Electronic Components
0.40%
of portfolio
Number of shares
3,572,660 sh
Holdings current value
$514.11M
Avg closing price
$134.15
+152.4%
Last action
Added 0.4%
2025Q4
Current $338.53
60
P
PYPLPAYPAL HLDGS INC
Financial Services·Credit Services
0.39%
of portfolio
Number of shares
5,944,806 sh
Holdings current value
$507.39M
Avg closing price
$63.90
-22.1%
Last action
Added 33.4%
2025Q4
Current $49.75
61
Z
ZBHZIMMER BIOMET HOLDINGS INC
Healthcare·Medical Devices
0.39%
of portfolio
Number of shares
4,797,150 sh
Holdings current value
$506.72M
Avg closing price
$131.74
-29.8%
Last action
Trimmed 5.0%
2025Q4
Current $92.44
62
B
BNTXBIONTECH SEADR
Healthcare·Biotechnology
0.38%
of portfolio
Number of shares
4,295,817 sh
Holdings current value
$489.51M
Avg closing price
$92.25
+14.4%
Last action
Trimmed 1.6%
2025Q4
Current $105.56
63
C
COPCONOCOPHILLIPS
Energy·Oil & Gas E&P
0.35%
of portfolio
Number of shares
4,603,895 sh
Holdings current value
$456.57M
Avg closing price
$102.75
+21.0%
Last action
Added 36.3%
2025Q4
Current $124.37
64
B
BACBK OF AMERICA CORP
Financial Services·Banks - Diversified
0.34%
of portfolio
Number of shares
10,027,332 sh
Holdings current value
$440.70M
Avg closing price
$38.45
+36.5%
Last action
Added 0.8%
2025Q4
Current $52.47
65
C
CMECME GROUP INC
Financial Services·Financial Data & Stock Exchanges
0.34%
of portfolio
Number of shares
1,864,920 sh
Holdings current value
$433.09M
Avg closing price
$220.20
+29.6%
Last action
Trimmed 3.2%
2025Q4
Current $285.47
66
M
METAMETA PLATFORMS INC
Communication Services·Internet Content & Information
0.33%
of portfolio
Number of shares
736,100 sh
Holdings current value
$430.99M
Avg closing price
$530.96
+24.1%
Last action
Trimmed 23.2%
2025Q4
Current $659.15
67
A
AMATAPPLIED MATLS INC
Technology·Semiconductor Equipment & Materials
0.33%
of portfolio
Number of shares
2,596,280 sh
Holdings current value
$422.23M
Avg closing price
$206.23
+95.9%
Last action
Trimmed 11.9%
2025Q4
Current $403.91
68
K
KMXCARMAX INC
Consumer Cyclical·Auto & Truck Dealerships
0.32%
of portfolio
Number of shares
5,080,456 sh
Holdings current value
$415.38M
Avg closing price
$87.11
-55.7%
Last action
Trimmed 3.7%
2025Q4
Current $38.55
69
G
GLWCORNING INC
Technology·Electronic Components
0.31%
of portfolio
Number of shares
8,325,672 sh
Holdings current value
$395.64M
Avg closing price
$32.96
+414.3%
Last action
Trimmed 5.3%
2025Q4
Current $169.50
70
A
ASMLASML HOLDING N V
Technology·Semiconductor Equipment & Materials
0.29%
of portfolio
Number of shares
546,309 sh
Holdings current value
$378.64M
Avg closing price
$970.47
+46.1%
Last action
Trimmed 5.3%
2025Q4
Current $1418
71
E
ERICERICSSONADR
Technology·Communication Equipment
0.29%
of portfolio
Number of shares
46,270,799 sh
Holdings current value
$372.94M
Avg closing price
$5.78
+95.9%
Last action
Added 3.9%
2025Q4
Current $11.32
72
T
TXTTEXTRON INC
Industrials·Aerospace & Defense
0.29%
of portfolio
Number of shares
4,874,615 sh
Holdings current value
$372.86M
Avg closing price
$95.93
-5.8%
Last action
Trimmed 26.7%
2025Q4
Current $90.37
73
R
RYTMRHYTHM PHARMACEUTICALS INC
Healthcare·Biotechnology
0.28%
of portfolio
Number of shares
6,571,190 sh
Holdings current value
$367.86M
Avg closing price
$43.33
+96.7%
Last action
Trimmed 10.7%
2025Q4
Current $85.21
74
U
UPSUNITED PARCEL SERVICE INC
Industrials·Integrated Freight & Logistics
0.27%
of portfolio
Number of shares
2,788,761 sh
Holdings current value
$351.66M
Avg closing price
$148.63
-27.5%
Last action
Trimmed 4.0%
2025Q4
Current $107.72
75
U
UNPUNION PAC CORP
Industrials·Railroads
0.26%
of portfolio
Number of shares
1,497,280 sh
Holdings current value
$341.44M
Avg closing price
$245.93
+10.3%
Last action
Trimmed 5.8%
2025Q4
Current $271.26

Portfolio heatmap

Box size = % of portfolio · color = return since filing
LLY
10.02% · +18.9%
MSFT
3.12% · -1.4%
FDX
2.70% · +39.6%
AMGN
2.62% · +33.8%
BSX
2.55% · -26.5%
KLAC
2.53% · +188.1%
GOOGL
2.49% · +79.0%
MU
2.45% · +472.4%
TSLA
2.36% · -7.5%
NVDA
2.21% · +48.7%
TXN
2.09% · +50.5%
AZN
2.08% · +193.5%
BIIB
1.90% · +22.9%
ADBE
1.89% · -46.3%
UAL
1.71% · -6.0%
GOOG
1.68% · +77.4%
SONY
1.67% · -3.2%
ORCL
1.57% · +5.8%
BABA
1.44% · +55.3%
WFC
1.39% · +14.6%
RJF
1.38% · -1.2%
LUV
1.27% · +12.3%
ROST
1.21% · +50.0%
INTC
1.20% · +233.1%

Sector exposure

Share of dollar value across the latest reported portfolio. Unclassified positions excluded.
  • Technology71 pos$36.77B29.6%
  • Healthcare55 pos$35.67B28.7%
  • Industrials55 pos$16.52B13.3%
  • Consumer Cyclical33 pos$11.90B9.6%
  • Financial Services23 pos$10.78B8.7%
  • Communication Services22 pos$8.53B6.9%
  • Energy9 pos$1.88B1.5%
  • Consumer Defensive14 pos$1.26B1.0%
  • Basic Materials9 pos$786.0M0.6%
  • Real Estate2 pos$16.3M0.0%
(3.9% unclassified, excluded from %)