OpenStocks
Smart money
  • Super investors
  • Most popular stocks
  • Biggest buys
  • Biggest sells
  • New positions
  • Smart-money signals
Insiders
  • Insider trading
  • Browse insiders
  • Transactions feed
  • Insider trading RSS
Congress
  • Congress stock trades
  • All members of Congress
  • Trades by committee
  • Congress trades RSS
Markets
  • ETFs
  • Sectors
  • Industries
  • Stock screener
  • Daily market digest
  • Blog
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
  • Overview
  • Portfolio319
  • Performance8Q
  • Options
  • Activity2.2k
  • News

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 · 2024Q1
1 / 5
75 of 335
1
L
LLYLILLY ELI & CO
Healthcare·Drug Manufacturers - General
12.33%
of portfolio
Number of shares
21,254,190 sh
Holdings current value
$16.53B
Avg closing price
$777.96
+18.0%
Last action
Trimmed 6.7%
2025Q4
Current $917.65
2
M
MUMICRON TECHNOLOGY INC
Technology·Semiconductors
3.31%
of portfolio
Number of shares
37,609,462 sh
Holdings current value
$4.43B
Avg closing price
$117.81
+308.9%
Last action
Trimmed 11.4%
2025Q4
Current $481.72
3
M
MSFTMICROSOFT CORP
Technology·Software - Infrastructure
3.21%
of portfolio
Number of shares
10,237,595 sh
Holdings current value
$4.31B
Avg closing price
$420.96
-1.2%
Last action
Trimmed 9.7%
2025Q4
Current $415.75
4
A
AMGNAMGEN INC
Healthcare·Drug Manufacturers - General
3.10%
of portfolio
Number of shares
14,601,958 sh
Holdings current value
$4.15B
Avg closing price
$284.32
+22.6%
Last action
Trimmed 5.2%
2025Q4
Current $348.62
5
K
KLACKLA CORP
Technology·Semiconductor Equipment & Materials
3.01%
of portfolio
Number of shares
5,784,869 sh
Holdings current value
$4.04B
Avg closing price
$698.57
+159.9%
Last action
Trimmed 10.2%
2025Q4
Current $1815
6
F
FDXFEDEX CORP
Industrials·Integrated Freight & Logistics
2.79%
of portfolio
Number of shares
12,889,655 sh
Holdings current value
$3.73B
Avg closing price
$289.74
+35.5%
Last action
Trimmed 6.7%
2025Q4
Current $392.69
7
B
BIIBBIOGEN INC
Healthcare·Drug Manufacturers - General
2.61%
of portfolio
Number of shares
16,220,716 sh
Holdings current value
$3.50B
Avg closing price
$215.75
-12.9%
Last action
Trimmed 1.2%
2025Q4
Current $187.88
8
I
INTCINTEL CORP
Technology·Semiconductors
2.51%
of portfolio
Number of shares
76,125,037 sh
Holdings current value
$3.36B
Avg closing price
$43.00
+55.3%
Last action
Trimmed 4.1%
2025Q4
Current $66.78
9
A
ADBEADOBE SYSTEMS INCORPORATED
Technology·Software - Application
2.21%
of portfolio
Number of shares
5,859,642 sh
Holdings current value
$2.96B
Avg closing price
$504.60
-52.6%
Last action
Trimmed 3.0%
2025Q4
Current $238.98
10
A
AZNASTRAZENECA PLCADR
Healthcare·Drug Manufacturers - General
2.17%
of portfolio
Number of shares
42,945,175 sh
Holdings current value
$2.91B
Avg closing price
$67.78
+183.7%
Last action
Trimmed 6.4%
2025Q4
Current $192.30
11
G
GOOGLALPHABET INC
Communication Services·Internet Content & Information
2.16%
of portfolio
Number of shares
19,146,550 sh
Holdings current value
$2.89B
Avg closing price
$151.47
+123.7%
Last action
Trimmed 3.3%
2025Q4
Current $338.89
12
T
TXNTEXAS INSTRS INC
Technology·Semiconductors
2.02%
of portfolio
Number of shares
15,518,542 sh
Holdings current value
$2.70B
Avg closing price
$174.21
+62.0%
Last action
Trimmed 6.9%
2025Q4
Current $282.23
13
B
BSXBOSTON SCIENTIFIC CORP
Healthcare·Medical Devices
1.94%
of portfolio
Number of shares
37,947,665 sh
Holdings current value
$2.60B
Avg closing price
$68.49
-4.1%
Last action
Trimmed 5.0%
2025Q4
Current $65.69
14
W
WFCWELLS FARGO CO NEW
Financial Services·Banks - Diversified
1.83%
of portfolio
Number of shares
42,419,390 sh
Holdings current value
$2.46B
Avg closing price
$57.96
+38.9%
Last action
Trimmed 13.4%
2025Q4
Current $80.51
15
N
NVDANVIDIA CORPORATION
Technology·Semiconductors
1.56%
of portfolio
Number of shares
2,309,935 sh
Holdings current value
$2.09B
Avg closing price
$206.69
-3.4%
Last action
Trimmed 40.0%
2025Q4
Current $199.64
16
G
GOOGALPHABET INC
Communication Services·Internet Content & Information
1.44%
of portfolio
Number of shares
12,675,480 sh
Holdings current value
$1.93B
Avg closing price
$152.26
+121.8%
Last action
Trimmed 2.8%
2025Q4
Current $337.75
17
S
SONYSONY GROUP CORPORATIONADR
Technology·Consumer Electronics
1.39%
of portfolio
Number of shares
21,745,283 sh
Holdings current value
$1.86B
Avg closing price
$34.63
-40.8%
Last action
Trimmed 22.0%
2025Q4
Current $20.49
18
O
ORCLORACLE CORP
Technology·Software - Infrastructure
1.23%
of portfolio
Number of shares
13,083,701 sh
Holdings current value
$1.64B
Avg closing price
$128.98
+36.7%
Last action
Trimmed 10.3%
2025Q4
Current $176.28
19
B
BMRNBIOMARIN PHARMACEUTICAL INC
Healthcare·Biotechnology
1.22%
of portfolio
Number of shares
18,713,895 sh
Holdings current value
$1.63B
Avg closing price
$87.25
-38.1%
Last action
Trimmed 3.5%
2025Q4
Current $53.98
20
T
TMOTHERMO FISHER SCIENTIFIC INC
Healthcare·Diagnostics & Research
1.20%
of portfolio
Number of shares
2,757,557 sh
Holdings current value
$1.60B
Avg closing price
$574.72
-18.8%
Last action
Trimmed 8.2%
2025Q4
Current $466.70
21
T
TSLATESLA INC
Consumer Cyclical·Auto Manufacturers
1.19%
of portfolio
Number of shares
9,039,080 sh
Holdings current value
$1.59B
Avg closing price
$175.79
+112.6%
Last action
Trimmed 3.3%
2025Q4
Current $373.72
22
R
ROSTROSS STORES INC
Consumer Cyclical·Apparel Retail
1.17%
of portfolio
Number of shares
10,712,924 sh
Holdings current value
$1.57B
Avg closing price
$146.66
+54.7%
Last action
Trimmed 6.5%
2025Q4
Current $226.92
23
R
RJFRAYMOND JAMES FINL INC
Financial Services·Asset Management
1.16%
of portfolio
Number of shares
12,090,097 sh
Holdings current value
$1.55B
Avg closing price
$129.16
+18.8%
Last action
Trimmed 2.5%
2025Q4
Current $153.41
24
N
NTAPNETAPP INC
Technology·Software - Infrastructure
1.14%
of portfolio
Number of shares
14,504,964 sh
Holdings current value
$1.52B
Avg closing price
$104.97
+3.3%
Last action
Trimmed 3.7%
2025Q4
Current $108.40
25
B
BABAALIBABA GROUP HLDG LTDADR
Consumer Cyclical·Internet Retail
1.12%
of portfolio
Number of shares
20,796,812 sh
Holdings current value
$1.50B
Avg closing price
$72.71
+81.1%
Last action
Trimmed 4.6%
2025Q4
Current $131.70
26
L
LUVSOUTHWEST AIRLS CO
Industrials·Airlines
1.09%
of portfolio
Number of shares
50,253,328 sh
Holdings current value
$1.47B
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
0.98%
of portfolio
Number of shares
13,020,748 sh
Holdings current value
$1.32B
Avg closing price
$101.42
+56.1%
Last action
Trimmed 5.7%
2025Q4
Current $158.35
28
A
ACMAECOM
Industrials·Engineering & Construction
0.98%
of portfolio
Number of shares
13,426,219 sh
Holdings current value
$1.32B
Avg closing price
$98.08
-18.0%
Last action
Trimmed 1.5%
2025Q4
Current $80.46
29
Y
Y2573F102FLEX LTD
0.98%
of portfolio
Number of shares
45,765,464 sh
Holdings current value
$1.31B
Avg closing price
$28.61
Last action
Trimmed 6.0%
2025Q4
Current —
30
B
BMYBRISTOL-MYERS SQUIBB CO
Healthcare·Drug Manufacturers - General
0.94%
of portfolio
Number of shares
23,273,407 sh
Holdings current value
$1.26B
Avg closing price
$54.14
+9.0%
Last action
Added 13.6%
2025Q4
Current $59.02
31
N
NVSNOVARTIS AGADR
Healthcare·Drug Manufacturers - General
0.90%
of portfolio
Number of shares
12,417,755 sh
Holdings current value
$1.20B
Avg closing price
$96.77
+52.4%
Last action
Trimmed 12.4%
2025Q4
Current $147.48
32
H
HESHESS CORP
0.88%
of portfolio
Number of shares
7,757,522 sh
Holdings current value
$1.18B
Avg closing price
$151.48
Last action
Exited
2025Q3
Current —
33
P
PXDEURPIONEER NAT RES CO
0.85%
of portfolio
Number of shares
4,342,556 sh
Holdings current value
$1.14B
Avg closing price
$262.50
Last action
Exited
2024Q2
Current —
34
U
UALUNITED AIRLS HLDGS INC
Industrials·Airlines
0.85%
of portfolio
Number of shares
23,701,089 sh
Holdings current value
$1.13B
Avg closing price
$47.88
+90.6%
Last action
Trimmed 7.9%
2025Q4
Current $91.25
35
V
VVISA INC
Financial Services·Credit Services
0.84%
of portfolio
Number of shares
4,058,451 sh
Holdings current value
$1.13B
Avg closing price
$285.77
+8.1%
Last action
Trimmed 1.4%
2025Q4
Current $308.88
36
I
INTUINTUIT
Technology·Software - Application
0.82%
of portfolio
Number of shares
1,701,621 sh
Holdings current value
$1.11B
Avg closing price
$650.00
-41.0%
Last action
Trimmed 3.7%
2025Q4
Current $383.30
37
D
DALDELTA AIR LINES INC DEL
Industrials·Airlines
0.81%
of portfolio
Number of shares
22,567,823 sh
Holdings current value
$1.08B
Avg closing price
$47.87
+42.8%
Last action
Trimmed 3.0%
2025Q4
Current $68.37
38
B
BIDUBAIDU INCADR
Communication Services·Internet Content & Information
0.80%
of portfolio
Number of shares
10,194,129 sh
Holdings current value
$1.07B
Avg closing price
$102.32
+18.8%
Last action
Trimmed 9.0%
2025Q4
Current $121.53
39
J
JPMJPMORGAN CHASE & CO
Financial Services·Banks - Diversified
0.77%
of portfolio
Number of shares
5,150,246 sh
Holdings current value
$1.03B
Avg closing price
$200.57
+55.4%
Last action
Trimmed 4.3%
2025Q4
Current $311.69
40
J
JJACOBS SOLUTIONS INC
Industrials·Engineering & Construction
0.68%
of portfolio
Number of shares
5,946,252 sh
Holdings current value
$914.12M
Avg closing price
$153.28
-16.8%
Last action
Trimmed 1.1%
2025Q4
Current $127.58
41
Q
QCOMQUALCOMM INC
Technology·Semiconductors
0.65%
of portfolio
Number of shares
5,109,007 sh
Holdings current value
$864.95M
Avg closing price
$169.30
-20.9%
Last action
Trimmed 2.4%
2025Q4
Current $133.95
42
E
ELANELANCO ANIMAL HEALTH INC
Healthcare·Drug Manufacturers - Specialty & Generic
0.64%
of portfolio
Number of shares
52,885,068 sh
Holdings current value
$860.97M
Avg closing price
$16.22
+38.0%
Last action
Trimmed 6.6%
2025Q4
Current $22.39
43
D
DISDISNEY WALT CO
Communication Services·Entertainment
0.60%
of portfolio
Number of shares
6,524,341 sh
Holdings current value
$798.32M
Avg closing price
$122.40
-15.3%
Last action
Trimmed 0.2%
2025Q4
Current $103.65
44
A
AMZNAMAZON COM INC
Consumer Cyclical·Internet Retail
0.58%
of portfolio
Number of shares
4,346,000 sh
Holdings current value
$783.93M
Avg closing price
$206.84
+23.3%
Last action
Added 55.0%
2025Q4
Current $255.08
45
M
MATMATTEL INC
Consumer Cyclical·Leisure
0.58%
of portfolio
Number of shares
39,567,394 sh
Holdings current value
$783.83M
Avg closing price
$19.81
-25.5%
Last action
Trimmed 3.8%
2025Q4
Current $14.76
46
O
ONCBEIGENE LTDADR
Healthcare·Biotechnology
0.58%
of portfolio
Number of shares
5,001,839 sh
Holdings current value
$782.24M
Avg closing price
$157.63
+90.2%
Last action
Trimmed 2.0%
2025Q4
Current $299.81
47
A
ADIANALOG DEVICES INC
Technology·Semiconductors
0.54%
of portfolio
Number of shares
3,628,170 sh
Holdings current value
$717.62M
Avg closing price
$197.79
+104.2%
Last action
Trimmed 3.7%
2025Q4
Current $403.88
48
V
V7780T103ROYAL CARIBBEAN GROUP
0.52%
of portfolio
Number of shares
5,001,265 sh
Holdings current value
$695.23M
Avg closing price
$139.01
Last action
Trimmed 6.5%
2025Q4
Current —
49
Z
ZBHZIMMER BIOMET HOLDINGS INC
Healthcare·Medical Devices
0.50%
of portfolio
Number of shares
5,062,950 sh
Holdings current value
$668.21M
Avg closing price
$131.74
-29.8%
Last action
Trimmed 4.7%
2025Q4
Current $92.44
50
A
AALAMERICAN AIRLS GROUP INC
Industrials·Airlines
0.48%
of portfolio
Number of shares
42,332,046 sh
Holdings current value
$649.80M
Avg closing price
$14.43
-18.4%
Last action
Trimmed 1.5%
2025Q4
Current $11.78
51
H
HPQHP INC
Technology·Computer Hardware
0.48%
of portfolio
Number of shares
21,131,365 sh
Holdings current value
$638.59M
Avg closing price
$30.50
-34.0%
Last action
Trimmed 2.2%
2025Q4
Current $20.14
52
C
CATCATERPILLAR INC
Industrials·Farm & Heavy Construction Machinery
0.47%
of portfolio
Number of shares
1,730,972 sh
Holdings current value
$634.28M
Avg closing price
$366.43
+127.9%
Last action
Trimmed 18.4%
2025Q4
Current $835.24
53
T
TDGTRANSDIGM GROUP INC
Industrials·Aerospace & Defense
0.47%
of portfolio
Number of shares
512,294 sh
Holdings current value
$630.94M
Avg closing price
$1258
-7.3%
Last action
Trimmed 25.5%
2025Q4
Current $1166
54
A
AMATAPPLIED MATLS INC
Technology·Semiconductor Equipment & Materials
0.46%
of portfolio
Number of shares
3,009,083 sh
Holdings current value
$620.56M
Avg closing price
$206.23
+95.9%
Last action
Trimmed 10.4%
2025Q4
Current $403.91
55
N
NTRSNORTHERN TR CORP
Financial Services·Asset Management
0.45%
of portfolio
Number of shares
6,785,472 sh
Holdings current value
$603.36M
Avg closing price
$94.95
+74.2%
Last action
Trimmed 12.1%
2025Q4
Current $165.39
56
M
MRSHMARSH & MCLENNAN COS INC
Financial Services·Insurance Brokers
0.44%
of portfolio
Number of shares
2,881,611 sh
Holdings current value
$593.55M
Avg closing price
$205.98
-15.5%
Last action
Trimmed 31.1%
2025Q4
Current $174.01
57
W
WHRWHIRLPOOL CORP
Consumer Cyclical·Furnishings, Fixtures & Appliances
0.43%
of portfolio
Number of shares
4,773,676 sh
Holdings current value
$571.07M
Avg closing price
$119.33
-54.6%
Last action
Trimmed 9.4%
2025Q4
Current $54.20
58
H
HPEHEWLETT PACKARD ENTERPRISE C
Technology·Communication Equipment
0.42%
of portfolio
Number of shares
31,993,666 sh
Holdings current value
$567.25M
Avg closing price
$17.73
+57.5%
Last action
Trimmed 5.0%
2025Q4
Current $27.93
59
A
ASMLASML HOLDING N V
Technology·Semiconductor Equipment & Materials
0.42%
of portfolio
Number of shares
576,071 sh
Holdings current value
$559.06M
Avg closing price
$970.47
+46.1%
Last action
Trimmed 5.1%
2025Q4
Current $1418
60
G
GSKGSK PLCADR
Healthcare·Drug Manufacturers - General
0.41%
of portfolio
Number of shares
12,738,370 sh
Holdings current value
$546.09M
Avg closing price
$38.78
+43.5%
Last action
Trimmed 4.8%
2025Q4
Current $55.63
61
T
TXTTEXTRON INC
Industrials·Aerospace & Defense
0.38%
of portfolio
Number of shares
5,364,670 sh
Holdings current value
$514.63M
Avg closing price
$95.93
-5.8%
Last action
Trimmed 24.9%
2025Q4
Current $90.37
62
A
ALBALBEMARLE CORP
Basic Materials·Specialty Chemicals
0.37%
of portfolio
Number of shares
3,725,084 sh
Holdings current value
$490.74M
Avg closing price
$130.71
+47.8%
Last action
Trimmed 10.8%
2025Q4
Current $193.14
63
K
KMXCARMAX INC
Consumer Cyclical·Auto & Truck Dealerships
0.36%
of portfolio
Number of shares
5,522,019 sh
Holdings current value
$481.02M
Avg closing price
$87.11
-55.7%
Last action
Trimmed 3.4%
2025Q4
Current $38.55
64
J
JBLJABIL INC
Technology·Electronic Components
0.36%
of portfolio
Number of shares
3,575,075 sh
Holdings current value
$478.88M
Avg closing price
$134.15
+152.4%
Last action
Added 0.4%
2025Q4
Current $338.53
65
N
NXTNEXTRACKER INC
Technology·Solar
0.34%
of portfolio
Number of shares
8,217,513 sh
Holdings current value
$462.40M
Avg closing price
$56.25
+121.1%
Last action
Trimmed 5.8%
2025Q4
Current $124.36
66
B
BNTXBIONTECH SEADR
Healthcare·Biotechnology
0.33%
of portfolio
Number of shares
4,807,918 sh
Holdings current value
$443.53M
Avg closing price
$92.25
+14.4%
Last action
Trimmed 1.5%
2025Q4
Current $105.56
67
U
UPSUNITED PARCEL SERVICE INC
Industrials·Integrated Freight & Logistics
0.32%
of portfolio
Number of shares
2,902,305 sh
Holdings current value
$431.37M
Avg closing price
$148.63
-27.5%
Last action
Trimmed 3.8%
2025Q4
Current $107.72
68
E
ENTGENTEGRIS INC
Technology·Semiconductor Equipment & Materials
0.31%
of portfolio
Number of shares
2,982,829 sh
Holdings current value
$419.21M
Avg closing price
$132.84
+12.4%
Last action
Trimmed 0.0%
2025Q4
Current $149.33
69
B
BACBK OF AMERICA CORP
Financial Services·Banks - Diversified
0.31%
of portfolio
Number of shares
10,939,006 sh
Holdings current value
$414.81M
Avg closing price
$38.45
+36.5%
Last action
Added 0.7%
2025Q4
Current $52.47
70
U
UNPUNION PAC CORP
Industrials·Railroads
0.30%
of portfolio
Number of shares
1,613,800 sh
Holdings current value
$396.88M
Avg closing price
$245.93
+10.3%
Last action
Trimmed 5.4%
2025Q4
Current $271.26
71
C
CMECME GROUP INC
Financial Services·Financial Data & Stock Exchanges
0.29%
of portfolio
Number of shares
1,801,030 sh
Holdings current value
$387.74M
Avg closing price
$220.20
+29.6%
Last action
Trimmed 3.3%
2025Q4
Current $285.47
72
E
EOGEOG RES INC
Energy·Oil & Gas E&P
0.27%
of portfolio
Number of shares
2,801,729 sh
Holdings current value
$358.17M
Avg closing price
$127.84
+4.7%
Last action
Trimmed 21.1%
2025Q4
Current $133.87
73
H
H8817H100TRANSOCEAN LTD
0.26%
of portfolio
Number of shares
55,744,039 sh
Holdings current value
$350.07M
Avg closing price
$6.27
Last action
Trimmed 9.9%
2025Q4
Current —
74
C
COPCONOCOPHILLIPS
Energy·Oil & Gas E&P
0.26%
of portfolio
Number of shares
2,746,355 sh
Holdings current value
$349.56M
Avg closing price
$102.75
+21.0%
Last action
Added 80.7%
2025Q4
Current $124.37
75
R
RYTMRHYTHM PHARMACEUTICALS INC
Healthcare·Biotechnology
0.25%
of portfolio
Number of shares
7,747,591 sh
Holdings current value
$335.70M
Avg closing price
$43.33
+96.7%
Last action
Trimmed 9.2%
2025Q4
Current $85.21

Portfolio heatmap

Box size = % of portfolio · color = return since filing
LLY
12.33% · +18.0%
MU
3.31% · +308.6%
MSFT
3.21% · -1.2%
AMGN
3.10% · +22.6%
KLAC
3.01% · +159.9%
FDX
2.79% · +35.5%
BIIB
2.61% · -12.9%
INTC
2.51% · +51.2%
ADBE
2.21% · -52.6%
AZN
2.17% · +183.8%
GOOGL
2.16% · +124.5%
TXN
2.02% · +62.0%
BSX
1.94% · -4.1%
WFC
1.83% · +38.9%
NVDA
1.56% · -77.9%
GOOG
1.44% · +121.8%
SONY
1.39% · -76.1%
ORCL
1.23% · +40.3%
BMRN
1.22% · -38.2%
TMO
1.20% · -19.7%
TSLA
1.19% · +112.6%
ROST
1.17% · +54.6%
RJF
1.16% · +19.5%
NTAP
1.14% · +3.3%

Sector exposure

Share of dollar value across the latest reported portfolio. Unclassified positions excluded.
  • Healthcare59 pos$41.24B32.3%
  • Technology71 pos$40.30B31.6%
  • Industrials54 pos$15.34B12.0%
  • Financial Services23 pos$10.04B7.9%
  • Consumer Cyclical35 pos$9.80B7.7%
  • Communication Services19 pos$7.78B6.1%
  • Energy7 pos$1.11B0.9%
  • Basic Materials8 pos$1.09B0.9%
  • Consumer Defensive10 pos$840.5M0.7%
  • Real Estate3 pos$21.0M0.0%
(4.9% unclassified, excluded from %)