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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 · 2024Q2
1 / 5
75 of 332
1
L
LLYLILLY ELI & CO
Healthcare·Drug Manufacturers - General
12.86%
of portfolio
Number of shares
19,618,082 sh
Holdings current value
$17.76B
Avg closing price
$777.96
+18.0%
Last action
Trimmed 7.2%
2025Q4
Current $917.65
2
M
MUMICRON TECHNOLOGY INC
Technology·Semiconductors
3.56%
of portfolio
Number of shares
37,425,361 sh
Holdings current value
$4.92B
Avg closing price
$117.81
+308.9%
Last action
Trimmed 11.5%
2025Q4
Current $481.72
3
K
KLACKLA CORP
Technology·Semiconductor Equipment & Materials
3.29%
of portfolio
Number of shares
5,515,689 sh
Holdings current value
$4.55B
Avg closing price
$698.57
+159.9%
Last action
Trimmed 10.7%
2025Q4
Current $1815
4
A
AMGNAMGEN INC
Healthcare·Drug Manufacturers - General
3.27%
of portfolio
Number of shares
14,447,127 sh
Holdings current value
$4.51B
Avg closing price
$284.32
+22.6%
Last action
Trimmed 5.3%
2025Q4
Current $348.62
5
M
MSFTMICROSOFT CORP
Technology·Software - Infrastructure
3.25%
of portfolio
Number of shares
10,043,580 sh
Holdings current value
$4.49B
Avg closing price
$420.96
-1.2%
Last action
Trimmed 9.9%
2025Q4
Current $415.75
6
F
FDXFEDEX CORP
Industrials·Integrated Freight & Logistics
2.78%
of portfolio
Number of shares
12,789,420 sh
Holdings current value
$3.83B
Avg closing price
$289.74
+35.5%
Last action
Trimmed 6.8%
2025Q4
Current $392.69
7
B
BIIBBIOGEN INC
Healthcare·Drug Manufacturers - General
2.74%
of portfolio
Number of shares
16,338,294 sh
Holdings current value
$3.79B
Avg closing price
$215.75
-12.9%
Last action
Trimmed 1.2%
2025Q4
Current $187.88
8
G
GOOGLALPHABET INC
Communication Services·Internet Content & Information
2.49%
of portfolio
Number of shares
18,903,240 sh
Holdings current value
$3.44B
Avg closing price
$151.47
+123.7%
Last action
Trimmed 3.3%
2025Q4
Current $338.89
9
A
AZNASTRAZENECA PLCADR
Healthcare·Drug Manufacturers - General
2.41%
of portfolio
Number of shares
42,597,235 sh
Holdings current value
$3.32B
Avg closing price
$67.78
+183.7%
Last action
Trimmed 6.5%
2025Q4
Current $192.30
10
A
ADBEADOBE SYSTEMS INCORPORATED
Technology·Software - Application
2.31%
of portfolio
Number of shares
5,735,711 sh
Holdings current value
$3.19B
Avg closing price
$504.60
-52.6%
Last action
Trimmed 3.1%
2025Q4
Current $238.98
11
T
TXNTEXAS INSTRS INC
Technology·Semiconductors
2.16%
of portfolio
Number of shares
15,341,904 sh
Holdings current value
$2.98B
Avg closing price
$174.21
+62.0%
Last action
Trimmed 7.0%
2025Q4
Current $282.23
12
B
BSXBOSTON SCIENTIFIC CORP
Healthcare·Medical Devices
2.12%
of portfolio
Number of shares
37,959,061 sh
Holdings current value
$2.92B
Avg closing price
$68.49
-4.1%
Last action
Trimmed 5.0%
2025Q4
Current $65.69
13
N
NVDANVIDIA CORPORATION
Technology·Semiconductors
1.94%
of portfolio
Number of shares
21,669,980 sh
Holdings current value
$2.68B
Avg closing price
$206.69
-3.4%
Last action
Trimmed 6.6%
2025Q4
Current $199.64
14
I
INTCINTEL CORP
Technology·Semiconductors
1.74%
of portfolio
Number of shares
77,822,587 sh
Holdings current value
$2.41B
Avg closing price
$43.00
+55.3%
Last action
Trimmed 4.0%
2025Q4
Current $66.78
15
G
GOOGALPHABET INC
Communication Services·Internet Content & Information
1.66%
of portfolio
Number of shares
12,527,940 sh
Holdings current value
$2.30B
Avg closing price
$152.26
+121.8%
Last action
Trimmed 2.8%
2025Q4
Current $337.75
16
W
WFCWELLS FARGO CO NEW
Financial Services·Banks - Diversified
1.60%
of portfolio
Number of shares
37,202,871 sh
Holdings current value
$2.21B
Avg closing price
$57.96
+38.9%
Last action
Trimmed 15.0%
2025Q4
Current $80.51
17
S
SONYSONY GROUP CORPORATIONADR
Technology·Consumer Electronics
1.32%
of portfolio
Number of shares
21,491,973 sh
Holdings current value
$1.83B
Avg closing price
$34.63
-40.8%
Last action
Trimmed 22.2%
2025Q4
Current $20.49
18
O
ORCLORACLE CORP
Technology·Software - Infrastructure
1.31%
of portfolio
Number of shares
12,848,720 sh
Holdings current value
$1.81B
Avg closing price
$128.98
+36.7%
Last action
Trimmed 10.5%
2025Q4
Current $176.28
19
N
NTAPNETAPP INC
Technology·Software - Infrastructure
1.29%
of portfolio
Number of shares
13,786,774 sh
Holdings current value
$1.78B
Avg closing price
$104.97
+3.3%
Last action
Trimmed 3.9%
2025Q4
Current $108.40
20
T
TSLATESLA INC
Consumer Cyclical·Auto Manufacturers
1.26%
of portfolio
Number of shares
8,823,200 sh
Holdings current value
$1.75B
Avg closing price
$175.79
+112.6%
Last action
Trimmed 3.3%
2025Q4
Current $373.72
21
B
BABAALIBABA GROUP HLDG LTDADR
Consumer Cyclical·Internet Retail
1.14%
of portfolio
Number of shares
21,870,987 sh
Holdings current value
$1.57B
Avg closing price
$72.71
+81.1%
Last action
Trimmed 4.4%
2025Q4
Current $131.70
22
R
ROSTROSS STORES INC
Consumer Cyclical·Apparel Retail
1.12%
of portfolio
Number of shares
10,650,717 sh
Holdings current value
$1.55B
Avg closing price
$146.66
+54.7%
Last action
Trimmed 6.6%
2025Q4
Current $226.92
23
B
BMRNBIOMARIN PHARMACEUTICAL INC
Healthcare·Biotechnology
1.12%
of portfolio
Number of shares
18,790,085 sh
Holdings current value
$1.55B
Avg closing price
$87.25
-38.1%
Last action
Trimmed 3.5%
2025Q4
Current $53.98
24
R
RJFRAYMOND JAMES FINL INC
Financial Services·Asset Management
1.08%
of portfolio
Number of shares
12,085,582 sh
Holdings current value
$1.49B
Avg closing price
$129.16
+18.8%
Last action
Trimmed 2.5%
2025Q4
Current $153.41
25
T
TMOTHERMO FISHER SCIENTIFIC INC
Healthcare·Diagnostics & Research
1.07%
of portfolio
Number of shares
2,666,937 sh
Holdings current value
$1.47B
Avg closing price
$574.72
-18.8%
Last action
Trimmed 8.4%
2025Q4
Current $466.70
26
L
LUVSOUTHWEST AIRLS CO
Industrials·Airlines
1.03%
of portfolio
Number of shares
49,908,845 sh
Holdings current value
$1.43B
Avg closing price
$29.26
+29.0%
Last action
Trimmed 1.2%
2025Q4
Current $37.75
27
T
TJXTJX COS INC NEW
Consumer Cyclical·Apparel Retail
0.99%
of portfolio
Number of shares
12,450,867 sh
Holdings current value
$1.37B
Avg closing price
$101.42
+56.1%
Last action
Trimmed 5.9%
2025Q4
Current $158.35
28
Y
Y2573F102FLEX LTD
0.95%
of portfolio
Number of shares
44,285,974 sh
Holdings current value
$1.31B
Avg closing price
$28.61
Last action
Trimmed 6.2%
2025Q4
Current —
29
N
NVSNOVARTIS AGADR
Healthcare·Drug Manufacturers - General
0.94%
of portfolio
Number of shares
12,179,345 sh
Holdings current value
$1.30B
Avg closing price
$96.77
+52.4%
Last action
Trimmed 12.6%
2025Q4
Current $147.48
30
H
HESHESS CORP
0.86%
of portfolio
Number of shares
8,098,012 sh
Holdings current value
$1.19B
Avg closing price
$151.48
Last action
Exited
2025Q3
Current —
31
U
UALUNITED AIRLS HLDGS INC
Industrials·Airlines
0.84%
of portfolio
Number of shares
23,729,342 sh
Holdings current value
$1.15B
Avg closing price
$47.88
+90.6%
Last action
Trimmed 7.9%
2025Q4
Current $91.25
32
A
ACMAECOM
Industrials·Engineering & Construction
0.83%
of portfolio
Number of shares
13,021,913 sh
Holdings current value
$1.15B
Avg closing price
$98.08
-18.0%
Last action
Trimmed 1.6%
2025Q4
Current $80.46
33
J
JPMJPMORGAN CHASE & CO
Financial Services·Banks - Diversified
0.82%
of portfolio
Number of shares
5,582,865 sh
Holdings current value
$1.13B
Avg closing price
$200.57
+55.4%
Last action
Trimmed 4.0%
2025Q4
Current $311.69
34
I
INTUINTUIT
Technology·Software - Application
0.80%
of portfolio
Number of shares
1,672,781 sh
Holdings current value
$1.10B
Avg closing price
$650.00
-41.0%
Last action
Trimmed 3.7%
2025Q4
Current $383.30
35
D
DALDELTA AIR LINES INC DEL
Industrials·Airlines
0.77%
of portfolio
Number of shares
22,434,223 sh
Holdings current value
$1.06B
Avg closing price
$47.87
+42.8%
Last action
Trimmed 3.0%
2025Q4
Current $68.37
36
V
VVISA INC
Financial Services·Credit Services
0.77%
of portfolio
Number of shares
4,047,195 sh
Holdings current value
$1.06B
Avg closing price
$285.77
+8.1%
Last action
Trimmed 1.4%
2025Q4
Current $308.88
37
B
BIDUBAIDU INCADR
Communication Services·Internet Content & Information
0.75%
of portfolio
Number of shares
11,947,706 sh
Holdings current value
$1.03B
Avg closing price
$102.32
+18.8%
Last action
Trimmed 7.8%
2025Q4
Current $121.53
38
Q
QCOMQUALCOMM INC
Technology·Semiconductors
0.71%
of portfolio
Number of shares
4,949,643 sh
Holdings current value
$985.87M
Avg closing price
$169.30
-20.9%
Last action
Trimmed 2.4%
2025Q4
Current $133.95
39
X
XOMEXXON MOBIL CORP
Energy·Oil & Gas Integrated
0.71%
of portfolio
Number of shares
8,514,677 sh
Holdings current value
$980.21M
Avg closing price
$115.12
+30.8%
Last action
Trimmed 5.4%
2025Q4
Current $150.53
40
B
BMYBRISTOL-MYERS SQUIBB CO
Healthcare·Drug Manufacturers - General
0.71%
of portfolio
Number of shares
23,498,604 sh
Holdings current value
$975.90M
Avg closing price
$54.14
+9.0%
Last action
Added 13.4%
2025Q4
Current $59.02
41
A
AMZNAMAZON COM INC
Consumer Cyclical·Internet Retail
0.61%
of portfolio
Number of shares
4,360,250 sh
Holdings current value
$842.62M
Avg closing price
$206.84
+23.3%
Last action
Added 54.8%
2025Q4
Current $255.08
42
A
ADIANALOG DEVICES INC
Technology·Semiconductors
0.60%
of portfolio
Number of shares
3,602,310 sh
Holdings current value
$822.26M
Avg closing price
$197.79
+104.2%
Last action
Trimmed 3.7%
2025Q4
Current $403.88
43
H
HPQHP INC
Technology·Computer Hardware
0.57%
of portfolio
Number of shares
22,451,096 sh
Holdings current value
$786.24M
Avg closing price
$30.50
-34.0%
Last action
Trimmed 2.1%
2025Q4
Current $20.14
44
J
JJACOBS SOLUTIONS INC
Industrials·Engineering & Construction
0.56%
of portfolio
Number of shares
5,582,222 sh
Holdings current value
$779.89M
Avg closing price
$153.28
-16.8%
Last action
Trimmed 1.2%
2025Q4
Current $127.58
45
V
V7780T103ROYAL CARIBBEAN GROUP
0.56%
of portfolio
Number of shares
4,874,443 sh
Holdings current value
$777.13M
Avg closing price
$139.01
Last action
Trimmed 6.6%
2025Q4
Current —
46
E
ELANELANCO ANIMAL HEALTH INC
Healthcare·Drug Manufacturers - Specialty & Generic
0.55%
of portfolio
Number of shares
52,802,763 sh
Holdings current value
$761.94M
Avg closing price
$16.22
+38.0%
Last action
Trimmed 6.6%
2025Q4
Current $22.39
47
O
ONCBEIGENE LTDADR
Healthcare·Biotechnology
0.52%
of portfolio
Number of shares
4,986,289 sh
Holdings current value
$711.39M
Avg closing price
$157.63
+90.2%
Last action
Trimmed 2.0%
2025Q4
Current $299.81
48
A
AMATAPPLIED MATLS INC
Technology·Semiconductor Equipment & Materials
0.49%
of portfolio
Number of shares
2,855,183 sh
Holdings current value
$673.79M
Avg closing price
$206.23
+95.9%
Last action
Trimmed 10.9%
2025Q4
Current $403.91
49
H
HPEHEWLETT PACKARD ENTERPRISE C
Technology·Communication Equipment
0.49%
of portfolio
Number of shares
31,775,271 sh
Holdings current value
$672.68M
Avg closing price
$17.73
+57.5%
Last action
Trimmed 5.0%
2025Q4
Current $27.93
50
T
TDGTRANSDIGM GROUP INC
Industrials·Aerospace & Defense
0.47%
of portfolio
Number of shares
512,294 sh
Holdings current value
$654.51M
Avg closing price
$1258
-7.3%
Last action
Trimmed 25.5%
2025Q4
Current $1166
51
D
DISDISNEY WALT CO
Communication Services·Entertainment
0.47%
of portfolio
Number of shares
6,497,724 sh
Holdings current value
$645.16M
Avg closing price
$122.40
-15.3%
Last action
Trimmed 0.2%
2025Q4
Current $103.65
52
A
AALAMERICAN AIRLS GROUP INC
Industrials·Airlines
0.47%
of portfolio
Number of shares
56,881,356 sh
Holdings current value
$644.47M
Avg closing price
$14.43
-18.4%
Last action
Trimmed 1.1%
2025Q4
Current $11.78
53
M
MATMATTEL INC
Consumer Cyclical·Leisure
0.45%
of portfolio
Number of shares
38,528,182 sh
Holdings current value
$626.47M
Avg closing price
$19.81
-25.5%
Last action
Trimmed 3.9%
2025Q4
Current $14.76
54
M
MRSHMARSH & MCLENNAN COS INC
Financial Services·Insurance Brokers
0.44%
of portfolio
Number of shares
2,871,716 sh
Holdings current value
$605.13M
Avg closing price
$205.98
-15.5%
Last action
Trimmed 31.2%
2025Q4
Current $174.01
55
N
NTRSNORTHERN TR CORP
Financial Services·Asset Management
0.43%
of portfolio
Number of shares
7,046,757 sh
Holdings current value
$591.79M
Avg closing price
$94.95
+74.2%
Last action
Trimmed 11.7%
2025Q4
Current $165.39
56
A
ASMLASML HOLDING N V
Technology·Semiconductor Equipment & Materials
0.42%
of portfolio
Number of shares
572,509 sh
Holdings current value
$585.52M
Avg closing price
$970.47
+46.1%
Last action
Trimmed 5.1%
2025Q4
Current $1418
57
G
GSKGSK PLCADR
Healthcare·Drug Manufacturers - General
0.40%
of portfolio
Number of shares
14,511,390 sh
Holdings current value
$558.69M
Avg closing price
$38.78
+43.5%
Last action
Trimmed 4.2%
2025Q4
Current $55.63
58
Z
ZBHZIMMER BIOMET HOLDINGS INC
Healthcare·Medical Devices
0.40%
of portfolio
Number of shares
5,054,590 sh
Holdings current value
$548.57M
Avg closing price
$131.74
-29.8%
Last action
Trimmed 4.7%
2025Q4
Current $92.44
59
C
CATCATERPILLAR INC
Industrials·Farm & Heavy Construction Machinery
0.39%
of portfolio
Number of shares
1,622,727 sh
Holdings current value
$540.53M
Avg closing price
$366.43
+127.9%
Last action
Trimmed 19.4%
2025Q4
Current $835.24
60
W
WHRWHIRLPOOL CORP
Consumer Cyclical·Furnishings, Fixtures & Appliances
0.36%
of portfolio
Number of shares
4,858,250 sh
Holdings current value
$496.51M
Avg closing price
$119.33
-54.6%
Last action
Trimmed 9.2%
2025Q4
Current $54.20
61
A
AAPLAPPLE INC
Technology·Consumer Electronics
0.34%
of portfolio
Number of shares
2,250,800 sh
Holdings current value
$474.06M
Avg closing price
$178.30
+53.4%
Last action
Trimmed 12.7%
2025Q3
Current $273.43
62
T
TXTTEXTRON INC
Industrials·Aerospace & Defense
0.33%
of portfolio
Number of shares
5,310,725 sh
Holdings current value
$455.98M
Avg closing price
$95.93
-5.8%
Last action
Trimmed 25.1%
2025Q4
Current $90.37
63
B
BACBK OF AMERICA CORP
Financial Services·Banks - Diversified
0.30%
of portfolio
Number of shares
10,344,132 sh
Holdings current value
$411.39M
Avg closing price
$38.45
+36.5%
Last action
Added 0.8%
2025Q4
Current $52.47
64
J
JBLJABIL INC
Technology·Electronic Components
0.29%
of portfolio
Number of shares
3,682,875 sh
Holdings current value
$400.66M
Avg closing price
$134.15
+152.4%
Last action
Added 0.3%
2025Q4
Current $338.53
65
E
ENTGENTEGRIS INC
Technology·Semiconductor Equipment & Materials
0.29%
of portfolio
Number of shares
2,955,532 sh
Holdings current value
$400.18M
Avg closing price
$132.84
+12.4%
Last action
Trimmed 0.0%
2025Q4
Current $149.33
66
O
OLEDUNIVERSAL DISPLAY CORP
Technology·Electronic Components
0.29%
of portfolio
Number of shares
1,895,017 sh
Holdings current value
$398.43M
Avg closing price
$165.26
-40.8%
Last action
Trimmed 3.2%
2025Q4
Current $97.78
67
K
KMXCARMAX INC
Consumer Cyclical·Auto & Truck Dealerships
0.29%
of portfolio
Number of shares
5,411,784 sh
Holdings current value
$396.90M
Avg closing price
$87.11
-55.7%
Last action
Trimmed 3.4%
2025Q4
Current $38.55
68
U
UPSUNITED PARCEL SERVICE INC
Industrials·Integrated Freight & Logistics
0.29%
of portfolio
Number of shares
2,893,315 sh
Holdings current value
$395.95M
Avg closing price
$148.63
-27.5%
Last action
Trimmed 3.8%
2025Q4
Current $107.72
69
B
BNTXBIONTECH SEADR
Healthcare·Biotechnology
0.28%
of portfolio
Number of shares
4,789,518 sh
Holdings current value
$384.89M
Avg closing price
$92.25
+14.4%
Last action
Trimmed 1.5%
2025Q4
Current $105.56
70
N
NXTNEXTRACKER INC
Technology·Solar
0.27%
of portfolio
Number of shares
7,990,923 sh
Holdings current value
$374.61M
Avg closing price
$56.25
+121.1%
Last action
Trimmed 6.0%
2025Q4
Current $124.36
71
A
ALBALBEMARLE CORP
Basic Materials·Specialty Chemicals
0.26%
of portfolio
Number of shares
3,813,054 sh
Holdings current value
$364.22M
Avg closing price
$130.71
+47.8%
Last action
Trimmed 10.6%
2025Q4
Current $193.14
72
U
UNPUNION PAC CORP
Industrials·Railroads
0.26%
of portfolio
Number of shares
1,604,170 sh
Holdings current value
$362.96M
Avg closing price
$245.93
+10.3%
Last action
Trimmed 5.4%
2025Q4
Current $271.26
73
M
METAMETA PLATFORMS INC
Communication Services·Internet Content & Information
0.26%
of portfolio
Number of shares
706,450 sh
Holdings current value
$356.21M
Avg closing price
$530.96
+24.1%
Last action
Trimmed 23.9%
2025Q4
Current $659.15
74
C
CMECME GROUP INC
Financial Services·Financial Data & Stock Exchanges
0.26%
of portfolio
Number of shares
1,803,043 sh
Holdings current value
$354.48M
Avg closing price
$220.20
+29.6%
Last action
Trimmed 3.3%
2025Q4
Current $285.47
75
E
EOGEOG RES INC
Energy·Oil & Gas E&P
0.25%
of portfolio
Number of shares
2,757,629 sh
Holdings current value
$347.10M
Avg closing price
$127.84
+4.7%
Last action
Trimmed 21.4%
2025Q4
Current $133.87

Portfolio heatmap

Box size = % of portfolio · color = return since filing
LLY
12.86% · +1.4%
MU
3.56% · +266.2%
KLAC
3.29% · +120.2%
AMGN
3.27% · +11.6%
MSFT
3.25% · -7.0%
FDX
2.78% · +31.0%
BIIB
2.74% · -19.0%
GOOGL
2.49% · +86.0%
AZN
2.41% · +146.6%
ADBE
2.31% · -57.0%
TXN
2.16% · +45.1%
BSX
2.12% · -14.7%
NVDA
1.94% · +61.6%
INTC
1.74% · +115.6%
GOOG
1.66% · +84.1%
WFC
1.60% · +35.6%
SONY
1.32% · -75.9%
ORCL
1.31% · +24.8%
NTAP
1.29% · -15.8%
TSLA
1.26% · +88.9%
BABA
1.14% · +82.9%
ROST
1.12% · +56.2%
BMRN
1.12% · -34.4%
RJF
1.08% · +24.1%

Sector exposure

Share of dollar value across the latest reported portfolio. Unclassified positions excluded.
  • Healthcare59 pos$43.17B32.5%
  • Technology71 pos$42.88B32.2%
  • Industrials55 pos$14.69B11.0%
  • Financial Services23 pos$9.92B7.5%
  • Consumer Cyclical35 pos$9.71B7.3%
  • Communication Services19 pos$8.55B6.4%
  • Energy8 pos$2.07B1.6%
  • Consumer Defensive11 pos$1.04B0.8%
  • Basic Materials8 pos$946.9M0.7%
  • Real Estate2 pos$17.9M0.0%
(3.7% unclassified, excluded from %)