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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 · 2025Q2
1 / 5
75 of 333
1
L
LLYLILLY ELI & CO
Healthcare·Drug Manufacturers - General
7.51%
of portfolio
Number of shares
12,154,908 sh
Holdings current value
$9.48B
Avg closing price
$777.96
+18.0%
Last action
Trimmed 11.2%
2025Q4
Current $917.65
2
M
MSFTMICROSOFT CORP
Technology·Software - Infrastructure
3.59%
of portfolio
Number of shares
9,115,265 sh
Holdings current value
$4.53B
Avg closing price
$420.96
-1.2%
Last action
Trimmed 10.8%
2025Q4
Current $415.75
3
K
KLACKLA CORP
Technology·Semiconductor Equipment & Materials
3.18%
of portfolio
Number of shares
4,480,277 sh
Holdings current value
$4.01B
Avg closing price
$698.57
+159.9%
Last action
Trimmed 12.8%
2025Q4
Current $1815
4
M
MUMICRON TECHNOLOGY INC
Technology·Semiconductors
3.07%
of portfolio
Number of shares
31,465,876 sh
Holdings current value
$3.88B
Avg closing price
$117.81
+308.9%
Last action
Trimmed 13.4%
2025Q4
Current $481.72
5
B
BSXBOSTON SCIENTIFIC CORP
Healthcare·Medical Devices
2.95%
of portfolio
Number of shares
34,662,722 sh
Holdings current value
$3.72B
Avg closing price
$68.49
-4.1%
Last action
Trimmed 5.5%
2025Q4
Current $65.69
6
N
NVDANVIDIA CORPORATION
Technology·Semiconductors
2.54%
of portfolio
Number of shares
20,322,650 sh
Holdings current value
$3.21B
Avg closing price
$206.69
-3.4%
Last action
Trimmed 7.0%
2025Q4
Current $199.64
7
A
AMGNAMGEN INC
Healthcare·Drug Manufacturers - General
2.35%
of portfolio
Number of shares
10,631,709 sh
Holdings current value
$2.97B
Avg closing price
$284.32
+22.6%
Last action
Trimmed 7.0%
2025Q4
Current $348.62
8
G
GOOGLALPHABET INC
Communication Services·Internet Content & Information
2.34%
of portfolio
Number of shares
16,748,294 sh
Holdings current value
$2.95B
Avg closing price
$151.47
+123.7%
Last action
Trimmed 3.7%
2025Q4
Current $338.89
9
A
AZNASTRAZENECA PLCADR
Healthcare·Drug Manufacturers - General
2.28%
of portfolio
Number of shares
41,200,091 sh
Holdings current value
$2.88B
Avg closing price
$67.78
+183.7%
Last action
Trimmed 6.7%
2025Q4
Current $192.30
10
T
TXNTEXAS INSTRS INC
Technology·Semiconductors
2.03%
of portfolio
Number of shares
12,334,019 sh
Holdings current value
$2.56B
Avg closing price
$174.21
+62.0%
Last action
Trimmed 8.5%
2025Q4
Current $282.23
11
O
ORCLORACLE CORP
Technology·Software - Infrastructure
1.94%
of portfolio
Number of shares
11,182,800 sh
Holdings current value
$2.44B
Avg closing price
$128.98
+36.7%
Last action
Trimmed 11.9%
2025Q4
Current $176.28
12
B
BABAALIBABA GROUP HLDG LTDADR
Consumer Cyclical·Internet Retail
1.87%
of portfolio
Number of shares
20,764,276 sh
Holdings current value
$2.35B
Avg closing price
$72.71
+81.1%
Last action
Trimmed 4.6%
2025Q4
Current $131.70
13
F
FDXFEDEX CORP
Industrials·Integrated Freight & Logistics
1.82%
of portfolio
Number of shares
10,091,340 sh
Holdings current value
$2.29B
Avg closing price
$289.74
+35.5%
Last action
Trimmed 8.4%
2025Q4
Current $392.69
14
T
TSLATESLA INC
Consumer Cyclical·Auto Manufacturers
1.74%
of portfolio
Number of shares
6,917,165 sh
Holdings current value
$2.20B
Avg closing price
$175.79
+112.6%
Last action
Trimmed 4.2%
2025Q4
Current $373.72
15
B
BIIBBIOGEN INC
Healthcare·Drug Manufacturers - General
1.57%
of portfolio
Number of shares
15,802,122 sh
Holdings current value
$1.98B
Avg closing price
$215.75
-12.9%
Last action
Trimmed 1.2%
2025Q4
Current $187.88
16
S
SONYSONY GROUP CORPORATIONADR
Technology·Consumer Electronics
1.46%
of portfolio
Number of shares
70,741,440 sh
Holdings current value
$1.84B
Avg closing price
$34.63
-40.8%
Last action
Trimmed 8.0%
2025Q4
Current $20.49
17
I
INTCINTEL CORP
Technology·Semiconductors
1.43%
of portfolio
Number of shares
80,298,180 sh
Holdings current value
$1.80B
Avg closing price
$43.00
+55.3%
Last action
Trimmed 3.9%
2025Q4
Current $66.78
18
S
SCHWSCHWAB CHARLES CORP
Financial Services·Capital Markets
1.38%
of portfolio
Number of shares
19,034,806 sh
Holdings current value
$1.74B
Avg closing price
$83.75
+6.2%
Last action
Added 12.2%
2025Q4
Current $88.92
19
Y
Y2573F102FLEX LTD
1.33%
of portfolio
Number of shares
33,603,616 sh
Holdings current value
$1.68B
Avg closing price
$28.61
Last action
Trimmed 8.0%
2025Q4
Current —
20
A
AMZNAMAZON COM INC
Consumer Cyclical·Internet Retail
1.31%
of portfolio
Number of shares
7,540,338 sh
Holdings current value
$1.65B
Avg closing price
$206.84
+23.3%
Last action
Added 25.7%
2025Q4
Current $255.08
21
A
ADBEADOBE SYSTEMS INCORPORATED
Technology·Software - Application
1.27%
of portfolio
Number of shares
4,157,536 sh
Holdings current value
$1.61B
Avg closing price
$504.60
-52.6%
Last action
Trimmed 4.2%
2025Q4
Current $238.98
22
L
LUVSOUTHWEST AIRLS CO
Industrials·Airlines
1.26%
of portfolio
Number of shares
48,844,143 sh
Holdings current value
$1.58B
Avg closing price
$29.26
+29.0%
Last action
Trimmed 1.2%
2025Q4
Current $37.75
23
R
RJFRAYMOND JAMES FINL INC
Financial Services·Asset Management
1.22%
of portfolio
Number of shares
10,013,852 sh
Holdings current value
$1.54B
Avg closing price
$129.16
+18.8%
Last action
Trimmed 2.9%
2025Q4
Current $153.41
24
V
VVISA INC
Financial Services·Credit Services
1.20%
of portfolio
Number of shares
4,247,543 sh
Holdings current value
$1.51B
Avg closing price
$285.77
+8.1%
Last action
Trimmed 1.3%
2025Q4
Current $308.88
25
G
GOOGALPHABET INC
Communication Services·Internet Content & Information
1.19%
of portfolio
Number of shares
8,476,357 sh
Holdings current value
$1.50B
Avg closing price
$152.26
+121.8%
Last action
Trimmed 4.1%
2025Q4
Current $337.75
26
U
UALUNITED AIRLS HLDGS INC
Industrials·Airlines
1.19%
of portfolio
Number of shares
18,834,710 sh
Holdings current value
$1.50B
Avg closing price
$47.88
+90.6%
Last action
Trimmed 9.7%
2025Q4
Current $91.25
27
J
JPMJPMORGAN CHASE & CO
Financial Services·Banks - Diversified
1.16%
of portfolio
Number of shares
5,045,127 sh
Holdings current value
$1.46B
Avg closing price
$200.57
+55.4%
Last action
Trimmed 4.4%
2025Q4
Current $311.69
28
W
WFCWELLS FARGO CO NEW
Financial Services·Banks - Diversified
1.15%
of portfolio
Number of shares
18,177,960 sh
Holdings current value
$1.46B
Avg closing price
$57.96
+38.9%
Last action
Trimmed 26.5%
2025Q4
Current $80.51
29
T
TJXTJX COS INC NEW
Consumer Cyclical·Apparel Retail
1.13%
of portfolio
Number of shares
11,536,892 sh
Holdings current value
$1.42B
Avg closing price
$101.42
+56.1%
Last action
Trimmed 6.4%
2025Q4
Current $158.35
30
R
ROSTROSS STORES INC
Consumer Cyclical·Apparel Retail
1.04%
of portfolio
Number of shares
10,268,700 sh
Holdings current value
$1.31B
Avg closing price
$146.66
+54.7%
Last action
Trimmed 6.8%
2025Q4
Current $226.92
31
N
NVSNOVARTIS AGADR
Healthcare·Drug Manufacturers - General
1.00%
of portfolio
Number of shares
10,401,434 sh
Holdings current value
$1.26B
Avg closing price
$96.77
+52.4%
Last action
Trimmed 14.5%
2025Q4
Current $147.48
32
O
ONCBEIGENE LTDADR
Healthcare·Biotechnology
0.98%
of portfolio
Number of shares
5,088,279 sh
Holdings current value
$1.23B
Avg closing price
$157.63
+90.2%
Last action
Trimmed 1.9%
2025Q4
Current $299.81
33
N
NTAPNETAPP INC
Technology·Software - Infrastructure
0.94%
of portfolio
Number of shares
11,166,845 sh
Holdings current value
$1.19B
Avg closing price
$104.97
+3.3%
Last action
Trimmed 4.8%
2025Q4
Current $108.40
34
A
ACMAECOM
Industrials·Engineering & Construction
0.86%
of portfolio
Number of shares
9,563,252 sh
Holdings current value
$1.08B
Avg closing price
$98.08
-18.0%
Last action
Trimmed 2.2%
2025Q4
Current $80.46
35
G
GSKGSK PLCADR
Healthcare·Drug Manufacturers - General
0.84%
of portfolio
Number of shares
27,726,780 sh
Holdings current value
$1.06B
Avg closing price
$38.78
+43.5%
Last action
Trimmed 2.2%
2025Q4
Current $55.63
36
B
BMYBRISTOL-MYERS SQUIBB CO
Healthcare·Drug Manufacturers - General
0.84%
of portfolio
Number of shares
22,944,650 sh
Holdings current value
$1.06B
Avg closing price
$54.14
+9.0%
Last action
Added 13.8%
2025Q4
Current $59.02
37
H
HESHESS CORP
0.84%
of portfolio
Number of shares
7,652,265 sh
Holdings current value
$1.06B
Avg closing price
$151.48
Last action
Exited
2025Q3
Current —
38
B
BIDUBAIDU INCADR
Communication Services·Internet Content & Information
0.82%
of portfolio
Number of shares
12,116,750 sh
Holdings current value
$1.04B
Avg closing price
$102.32
+18.8%
Last action
Trimmed 7.7%
2025Q4
Current $121.53
39
I
INTUINTUIT
Technology·Software - Application
0.82%
of portfolio
Number of shares
1,307,737 sh
Holdings current value
$1.03B
Avg closing price
$650.00
-41.0%
Last action
Trimmed 4.7%
2025Q4
Current $383.30
40
V
V7780T103ROYAL CARIBBEAN GROUP
0.79%
of portfolio
Number of shares
3,175,668 sh
Holdings current value
$994.43M
Avg closing price
$139.01
Last action
Trimmed 9.8%
2025Q4
Current —
41
D
DALDELTA AIR LINES INC DEL
Industrials·Airlines
0.79%
of portfolio
Number of shares
20,193,832 sh
Holdings current value
$993.13M
Avg closing price
$47.87
+42.8%
Last action
Trimmed 3.3%
2025Q4
Current $68.37
42
N
NTRSNORTHERN TR CORP
Financial Services·Asset Management
0.78%
of portfolio
Number of shares
7,793,757 sh
Holdings current value
$988.17M
Avg closing price
$94.95
+74.2%
Last action
Trimmed 10.7%
2025Q4
Current $165.39
43
T
TMOTHERMO FISHER SCIENTIFIC INC
Healthcare·Diagnostics & Research
0.77%
of portfolio
Number of shares
2,406,192 sh
Holdings current value
$975.61M
Avg closing price
$574.72
-18.8%
Last action
Trimmed 9.3%
2025Q4
Current $466.70
44
B
BMRNBIOMARIN PHARMACEUTICAL INC
Healthcare·Biotechnology
0.69%
of portfolio
Number of shares
15,772,173 sh
Holdings current value
$867.00M
Avg closing price
$87.25
-38.1%
Last action
Trimmed 4.1%
2025Q4
Current $53.98
45
T
TDGTRANSDIGM GROUP INC
Industrials·Aerospace & Defense
0.67%
of portfolio
Number of shares
557,923 sh
Holdings current value
$848.40M
Avg closing price
$1258
-7.3%
Last action
Trimmed 23.9%
2025Q4
Current $1166
46
A
ADIANALOG DEVICES INC
Technology·Semiconductors
0.65%
of portfolio
Number of shares
3,446,280 sh
Holdings current value
$820.28M
Avg closing price
$197.79
+104.2%
Last action
Trimmed 3.9%
2025Q4
Current $403.88
47
D
DISDISNEY WALT CO
Communication Services·Entertainment
0.62%
of portfolio
Number of shares
6,345,497 sh
Holdings current value
$786.91M
Avg closing price
$122.40
-15.3%
Last action
Trimmed 0.2%
2025Q4
Current $103.65
48
M
METAMETA PLATFORMS INC
Communication Services·Internet Content & Information
0.60%
of portfolio
Number of shares
1,017,530 sh
Holdings current value
$751.03M
Avg closing price
$530.96
+24.1%
Last action
Trimmed 17.9%
2025Q4
Current $659.15
49
J
JBLJABIL INC
Technology·Electronic Components
0.59%
of portfolio
Number of shares
3,410,410 sh
Holdings current value
$743.81M
Avg closing price
$134.15
+152.4%
Last action
Added 0.4%
2025Q4
Current $338.53
50
E
ELANELANCO ANIMAL HEALTH INC
Healthcare·Drug Manufacturers - Specialty & Generic
0.59%
of portfolio
Number of shares
51,766,814 sh
Holdings current value
$739.23M
Avg closing price
$16.22
+38.0%
Last action
Trimmed 6.7%
2025Q4
Current $22.39
51
C
COPCONOCOPHILLIPS
Energy·Oil & Gas E&P
0.56%
of portfolio
Number of shares
7,883,455 sh
Holdings current value
$707.46M
Avg closing price
$102.75
+21.0%
Last action
Added 18.4%
2025Q4
Current $124.37
52
M
MATMATTEL INC
Consumer Cyclical·Leisure
0.52%
of portfolio
Number of shares
33,218,261 sh
Holdings current value
$655.06M
Avg closing price
$19.81
-25.5%
Last action
Trimmed 4.5%
2025Q4
Current $14.76
53
J
JJACOBS SOLUTIONS INC
Industrials·Engineering & Construction
0.49%
of portfolio
Number of shares
4,749,829 sh
Holdings current value
$624.37M
Avg closing price
$153.28
-16.8%
Last action
Trimmed 1.4%
2025Q4
Current $127.58
54
A
AALAMERICAN AIRLS GROUP INC
Industrials·Airlines
0.48%
of portfolio
Number of shares
53,472,382 sh
Holdings current value
$599.96M
Avg closing price
$14.43
-18.4%
Last action
Trimmed 1.2%
2025Q4
Current $11.78
55
C
CMECME GROUP INC
Financial Services·Financial Data & Stock Exchanges
0.43%
of portfolio
Number of shares
1,988,495 sh
Holdings current value
$548.07M
Avg closing price
$220.20
+29.6%
Last action
Trimmed 3.0%
2025Q4
Current $285.47
56
Q
QCOMQUALCOMM INC
Technology·Semiconductors
0.43%
of portfolio
Number of shares
3,383,567 sh
Holdings current value
$538.87M
Avg closing price
$169.30
-20.9%
Last action
Trimmed 3.5%
2025Q4
Current $133.95
57
C
CATCATERPILLAR INC
Industrials·Farm & Heavy Construction Machinery
0.42%
of portfolio
Number of shares
1,370,898 sh
Holdings current value
$532.20M
Avg closing price
$366.43
+127.9%
Last action
Trimmed 22.2%
2025Q4
Current $835.24
58
G
G3643J108FLUTTER ENTMT PLC
0.39%
of portfolio
Number of shares
1,717,089 sh
Holdings current value
$490.68M
Avg closing price
$248.42
Last action
Added 5.4%
2025Q4
Current —
59
H
HPEHEWLETT PACKARD ENTERPRISE C
Technology·Communication Equipment
0.39%
of portfolio
Number of shares
23,804,787 sh
Holdings current value
$486.81M
Avg closing price
$17.73
+57.5%
Last action
Trimmed 6.6%
2025Q4
Current $27.93
60
P
PYPLPAYPAL HLDGS INC
Financial Services·Credit Services
0.39%
of portfolio
Number of shares
6,542,450 sh
Holdings current value
$486.23M
Avg closing price
$63.90
-22.1%
Last action
Added 29.4%
2025Q4
Current $49.75
61
X
XOMEXXON MOBIL CORP
Energy·Oil & Gas Integrated
0.37%
of portfolio
Number of shares
4,365,796 sh
Holdings current value
$470.63M
Avg closing price
$115.12
+30.8%
Last action
Trimmed 10.0%
2025Q4
Current $150.53
62
W
WHRWHIRLPOOL CORP
Consumer Cyclical·Furnishings, Fixtures & Appliances
0.37%
of portfolio
Number of shares
4,595,012 sh
Holdings current value
$466.03M
Avg closing price
$119.33
-54.6%
Last action
Trimmed 9.7%
2025Q4
Current $54.20
63
H
HPQHP INC
Technology·Computer Hardware
0.36%
of portfolio
Number of shares
18,644,020 sh
Holdings current value
$456.03M
Avg closing price
$30.50
-34.0%
Last action
Trimmed 2.5%
2025Q4
Current $20.14
64
Z
ZBHZIMMER BIOMET HOLDINGS INC
Healthcare·Medical Devices
0.34%
of portfolio
Number of shares
4,710,830 sh
Holdings current value
$429.67M
Avg closing price
$131.74
-29.8%
Last action
Trimmed 5.1%
2025Q4
Current $92.44
65
M
MRSHMARSH & MCLENNAN COS INC
Financial Services·Insurance Brokers
0.34%
of portfolio
Number of shares
1,962,826 sh
Holdings current value
$429.15M
Avg closing price
$205.98
-15.5%
Last action
Trimmed 39.9%
2025Q4
Current $174.01
66
A
AAPLAPPLE INC
Technology·Consumer Electronics
0.34%
of portfolio
Number of shares
2,089,680 sh
Holdings current value
$428.74M
Avg closing price
$178.30
+53.4%
Last action
Trimmed 13.6%
2025Q3
Current $273.43
67
B
BNTXBIONTECH SEADR
Healthcare·Biotechnology
0.34%
of portfolio
Number of shares
4,001,466 sh
Holdings current value
$426.04M
Avg closing price
$92.25
+14.4%
Last action
Trimmed 1.7%
2025Q4
Current $105.56
68
N
NXTNEXTRACKER INC
Technology·Solar
0.33%
of portfolio
Number of shares
7,675,821 sh
Holdings current value
$417.33M
Avg closing price
$56.25
+121.1%
Last action
Trimmed 6.2%
2025Q4
Current $124.36
69
D
DLTRDOLLAR TREE INC
Consumer Defensive·Discount Stores
0.31%
of portfolio
Number of shares
3,925,510 sh
Holdings current value
$388.78M
Avg closing price
$109.37
-6.5%
Last action
Trimmed 8.4%
2025Q4
Current $102.25
70
C
CSCOCISCO SYS INC
Technology·Communication Equipment
0.30%
of portfolio
Number of shares
5,499,360 sh
Holdings current value
$381.55M
Avg closing price
$49.91
+77.5%
Last action
Trimmed 6.9%
2025Q4
Current $88.59
71
P
PGRPROGRESSIVE CORP
Financial Services·Insurance - Property & Casualty
0.28%
of portfolio
Number of shares
1,339,480 sh
Holdings current value
$357.45M
Avg closing price
$208.11
-1.3%
Last action
Trimmed 8.0%
2025Q4
Current $205.33
72
O
OLEDUNIVERSAL DISPLAY CORP
Technology·Electronic Components
0.27%
of portfolio
Number of shares
2,215,308 sh
Holdings current value
$342.18M
Avg closing price
$165.26
-40.8%
Last action
Trimmed 2.7%
2025Q4
Current $97.78
73
A
ASMLASML HOLDING N V
Technology·Semiconductor Equipment & Materials
0.27%
of portfolio
Number of shares
422,609 sh
Holdings current value
$338.67M
Avg closing price
$970.47
+46.1%
Last action
Trimmed 6.8%
2025Q4
Current $1418
74
C
CWCURTISS WRIGHT CORP
Industrials·Aerospace & Defense
0.26%
of portfolio
Number of shares
683,840 sh
Holdings current value
$334.09M
Avg closing price
$255.94
+183.5%
Last action
Trimmed 7.5%
2025Q4
Current $725.50
75
T
TRMBTRIMBLE INC
Technology·Scientific & Technical Instruments
0.25%
of portfolio
Number of shares
4,232,541 sh
Holdings current value
$321.59M
Avg closing price
$64.36
+4.2%
Last action
Trimmed 3.6%
2025Q4
Current $67.04

Portfolio heatmap

Box size = % of portfolio · color = return since filing
LLY
7.51% · +17.7%
MSFT
3.59% · -16.4%
KLAC
3.18% · +102.7%
MU
3.07% · +290.8%
BSX
2.95% · -38.8%
NVDA
2.54% · +26.4%
AMGN
2.35% · +24.9%
GOOGL
2.34% · +92.3%
AZN
2.28% · +175.2%
TXN
2.03% · +35.9%
ORCL
1.94% · -19.4%
BABA
1.87% · +16.1%
FDX
1.82% · +72.8%
TSLA
1.74% · +17.6%
BIIB
1.57% · +49.6%
SONY
1.46% · -21.3%
INTC
1.43% · +198.1%
SCHW
1.38% · -2.5%
FLEX LTD
1.33%
AMZN
1.31% · +16.3%
ADBE
1.27% · -38.2%
LUV
1.26% · +16.4%
RJF
1.22% · +0.0%
V
1.20% · -13.0%

Sector exposure

Share of dollar value across the latest reported portfolio. Unclassified positions excluded.
  • Technology76 pos$38.00B31.5%
  • Healthcare54 pos$32.01B26.6%
  • Industrials51 pos$14.05B11.7%
  • Financial Services26 pos$12.22B10.1%
  • Consumer Cyclical34 pos$11.62B9.6%
  • Communication Services21 pos$8.20B6.8%
  • Consumer Defensive14 pos$1.76B1.5%
  • Energy9 pos$1.73B1.4%
  • Basic Materials10 pos$802.7M0.7%
  • Real Estate4 pos$82.0M0.1%
  • Utilities1 pos$8.4M0.0%
(4.5% unclassified, excluded from %)