PRIMECAP MANAGEMENT CO/CA/
Registered adviserFiling Date
Global Rank
#65
/ 8,807
▲ 4
Top Industry
Semiconductors
24.8%
Period ended 4 months ago
Filed Aug 14, 2026 · 2mo
26 quarters · since Mar 2020
Regulatory profile
From Form ADV, the SEC filer profile, 13D/13G type codes and N-CEN, never from the name.
Holder type
Registered adviser
Form ADV roster, Oct 1, 2026
Regulatory AUM
$139,344,370,550
Main clients
Registered funds and BDCs
(96% of AUM)
Registered funds advised
7 series
(0 index, 0 ETFs)
$127,689,044,200 net assets· N-CEN Dec 31, 2025
LEI
254900YBJPASOJ076244
Form ADV history
Monthly rosters from Dec 2019; each row is a run with the same figures, newest first.
| Rosters | Regulatory AUM | Main clients |
|---|---|---|
| Apr 2026 to Oct 2026 | $139,344,370,550 | Registered funds and BDCs (96%) |
| Apr 2025 to Mar 2026 | $135,873,993,240 | Registered funds and BDCs (94%) |
| Apr 2024 to Mar 2025 | $134,476,880,987 | Registered funds and BDCs (93%) |
| May 2023 to Mar 2024 | $117,232,900,412 | Registered funds and BDCs (91%) |
| Apr 2023 | $117,232,900,412 | Registered funds and BDCs (91%) |
| Apr 2022 to Mar 2023 | $153,658,443,874 | Registered funds and BDCs (91%) |
3 earlier changes not shown.
Portfolio style
Measured from the filed 13F common-share book for Jun 30, 2026, never from the firm's own description.
Style
Diversified active
Top 10 weight 43.7%, 29.1 effective positions, active share 67.9% against the Russell 1000 as of 2026-06-30; it meets none of the index-like, systematic-like or concentrated tests
Turnover
Low turnover
11.5% over the last four quarters (under 30%)
Horizon
Long horizon
Value-weighted holding period 24.1 quarters (12+), a floor since 87.4% of the book was already held when coverage starts
Closest benchmark: the Russell 1000 as of 2026-06-30, active share 67.9%; sector active share 26.1% against the combined 13F book's sector weights.
Over time 26 measured quarters
How the bands are measured
Style bands measure the filed 13F common-share book each closed quarter, tested in this order. Unknown: under $10,000,000 of valued equity or 5 stocks. Index-like (100+ stocks): active share of 20% or less against the closest benchmark, which is the S&P 500, S&P MidCap 400, S&P SmallCap 600, Russell 1000, Russell 2000, Nasdaq-100 or Dow Jones Industrial Average (weighted by an index-tracking fund's reported holdings or the index's constituents nearest the quarter end, over the names resolved to companies, and only when those are 90%+ of its weight) or every 13F filer's combined book, or index series holding 80%+ of the registered fund assets it advises (N-CEN) and equal to 50%+ of its book. Systematic-like: 500+ stocks, 100%+ annual turnover and a top 10 weight of 25% or less. Concentrated: a top 10 weight of 60%+ or 12 or fewer effective positions. Diversified active: none of these. Turnover is the smaller of buys and sells over average equity value, summed over four quarters: low under 30%, high 100%+. Horizon is the value-weighted number of quarters each position has been held: short under 4, long 12+.
Clone Performance
Build a hypothetical price-return history from this filer's public 13F holdings.
View clone backtestPortfolio Concentration
324 tracked positions · as of Jun 30, 2026 · Δ vs Mar 31, 2026Top Position
13.1%
+6.4 pts
Top 5
33.8%
+10.9 pts
Top 10
43.7%
+8.9 pts
HHI
344
Diversified+143
Portfolio Trend
26 quarters · across all stocks
Sector Breakdown
As of Jun 30, 2026| Sector | % Portfolio | Value |
|---|---|---|
| Technology | 42.8% | $72,333,939,009 |
| Healthcare | 21.1% | $35,720,360,297 |
| Industrials | 11.7% | $19,822,984,062 |
| Consumer Cyclical | 8.2% | $13,803,769,678 |
| Financial Services | 6.8% | $11,440,471,278 |
| Communication Services | 6.2% | $10,456,859,913 |
| Energy | 1.3% | $2,196,972,061 |
| Consumer Defensive | 1.2% | $1,950,535,423 |
| Basic Materials | 0.7% | $1,203,099,687 |
| Real Estate | 0.1% | $110,766,689 |
| Utilities | 0.0% | $66,656,418 |
Last Quarter's Activity
Export CSVAdded To
Positions the filer increased
25 positions
| Ticker | Company | Δ Shares | Shares | Value | Open |
|---|---|---|---|---|---|
| AAL | American Airlines Group Inc. | +21,743,000 | 70,732,954 | $1,278,144,478 | |
| KLAC | Kla Corp | +18,099,083 | 20,536,730 | $6,196,136,808 | |
| BSX | Boston Scientific Corp | +17,991,140 | 50,520,914 | $2,156,232,609 | |
| ALLO | Allogene Therapeutics, Inc. | +4,743,600 | 13,123,440 | $27,296,755 | |
| ERIC | Ericsson Lm Telephone Co | +4,109,600 | 41,613,613 | $463,991,784 | |
| HPQ | Hp Inc | +3,415,700 | 24,885,325 | $545,984,030 | |
| LUV | Southwest Airlines Co | +1,728,230 | 48,797,725 | $2,509,179,019 | |
| SCHW | Schwab Charles Corp | +1,678,980 | 25,120,895 | $2,317,904,981 | |
| BAH | Booz Allen Hamilton Holding Corp | +1,567,846 | 6,397,644 | $388,145,061 | |
| ILMN | Illumina, Inc. | +1,447,350 | 3,514,649 | $617,980,733 | |
| MRSH | Marsh & Mclennan Companies, Inc. | +1,427,525 | 2,145,025 | $357,511,316 | |
| SONY | Sony Group Corp | +1,072,400 | 59,603,230 | $1,195,640,793 | |
| CVNA | Carvana Co. | +790,100 | 987,625 | $65,005,477 | |
| DIS | Walt Disney Co | +785,830 | 7,020,957 | $675,767,111 | |
| UAL | United Airlines Holdings, Inc. | +711,020 | 16,461,630 | $2,238,617,063 | |
| PSN | Parsons Corp | +691,700 | 1,712,100 | $89,696,919 | |
| INDI | indie Semiconductor, Inc. | +557,341 | 31,623,647 | $141,990,175 | |
| WVE | Wave Life Sciences, Inc. | +521,670 | 5,354,622 | $31,110,353 | |
| ADBE | Adobe Inc. | +496,293 | 5,227,139 | $1,071,668,037 | |
| BBIO | BridgeBio Pharma, Inc. | +446,800 | 1,015,980 | $75,670,190 | |
| XEL | Xcel Energy Inc | +429,300 | 496,300 | $39,852,890 | |
| BIIB | Biogen Inc. | +396,999 | 15,154,606 | $3,274,304,172 | |
| GTLB | Gitlab Inc. | +384,300 | 7,683,350 | $234,572,675 | |
| NFLX | Netflix Inc | +378,675 | 4,790,465 | $342,039,201 | |
| OLLI | Ollie's Bargain Outlet Holdings, Inc. | +359,300 | 875,890 | $67,338,423 | |
| No positions match the current search. | |||||
Trimmed
Positions the filer reduced
25 positions
| Ticker | Company | Δ Shares | Shares | Value | Open |
|---|---|---|---|---|---|
| MU | Micron Technology Inc | −2,656,968 | 19,217,236 | $22,182,263,342 | |
| AMGN | Amgen Inc | −2,117,167 | 6,756,962 | $2,446,831,079 | |
| DOW | Dow Inc. | −2,103,130 | 2,251,432 | $61,599,179 | |
| GTM | ZoomInfo Technologies Inc. | −2,041,412 | 1,183,552 | $3,467,807 | |
| FLEX | Flex Ltd. | −2,024,573 | 23,358,875 | $3,785,772,871 | |
| NWL | Newell Brands Inc. | −1,661,690 | 5,863,700 | $36,003,118 | |
| DD | DuPont de Nemours, Inc. | −1,475,666 | 521,493 | $70,735,310 | |
| TXN | Texas Instruments Inc | −1,139,777 | 8,514,989 | $2,538,062,771 | |
| WFC | Wells Fargo & Company/Mn | −1,011,080 | 6,712,022 | $554,681,498 | |
| NVS | Novartis AG | −975,230 | 6,592,124 | $1,033,117,673 | |
| INTC | Intel Corp | −511,010 | 75,250,958 | $10,507,291,265 | |
| TTD | Trade Desk, Inc. | −500,150 | 732,455 | $13,242,786 | |
| QCOM | Qualcomm Inc/De | −466,337 | 239,250 | $44,211,007 | |
| DSGX | Descartes Systems Group Inc | −449,665 | 728,775 | $50,460,381 | |
| NFE | New Fortress Energy Inc. | −449,200 | 91,100 | $33,069 | |
| NTRS | Northern Trust Corp | −448,295 | 6,100,742 | $1,060,552,989 | |
| AUR | Aurora Innovation, Inc. | −407,830 | 9,398,280 | $64,096,269 | |
| ELAN | Elanco Animal Health Inc | −395,944 | 45,445,012 | $1,118,401,745 | |
| ARLO | Arlo Technologies, Inc. | −376,183 | 1,942,330 | $26,182,608 | |
| GKOS | GLAUKOS Corp | −329,923 | 3,040,705 | $424,968,930 | |
| GOOG | Alphabet Inc. | −321,850 | 5,399,060 | $1,907,649,869 | |
| ORCL | Oracle Corp | −287,900 | 5,386,230 | $789,352,006 | |
| IMAX | Imax Corp | −261,902 | 273,500 | $10,901,710 | |
| PYPL | PayPal Holdings, Inc. | −251,320 | 9,775,170 | $422,091,840 | |
| RYTM | Rhythm Pharmaceuticals, Inc. | −248,656 | 3,168,853 | $351,837,748 | |
| No positions match the current search. | |||||
New Positions
Positions the filer opened this quarter
10 positions
| Ticker | Company | Shares | Value | Open |
|---|---|---|---|---|
| FDXF | FedEx Freight Holding Company, Inc. | 4,048,660 | $611,347,660 | |
| SPCX | Space Exploration Technologies Corp | 1,407,762 | $240,530,215 | |
| DVN | Devon Energy Corp/De | 1,571,690 | $64,942,230 | |
| FHN | First Horizon Corp | 2,227,100 | $57,102,844 | |
| HONA | Honeywell Aerospace Inc. | 244,100 | $53,965,628 | |
| MCK | Mckesson Corp | 19,990 | $15,104,444 | |
| FRVO | Fervo Energy Co | 475,800 | $13,907,634 | |
| DXCM | Dexcom Inc | 192,000 | $12,931,200 | |
| BMNR | Bitmine Immersion Technologies, Inc. | 910,100 | $12,113,431 | |
| WING | Wingstop Inc. | 36,100 | $6,260,101 | |
| No positions match the current search. | ||||
324 tracked positions ·
$169,106,414,515 total
· filing declares
324 positions · $169,112,441,771
· as of Jun 30, 2026
All sectors
Basic Materials
Communication Services
Consumer Cyclical
Consumer Defensive
Energy
Financial Services
Healthcare
Industrials
Real Estate
Technology
Utilities
Showing 1–50
of 324 positions by value
· page 1 of 7
| Ticker | Company | Type | Shares | Value (USD) | % of Portfolio | History |
|---|---|---|---|---|---|---|
| MU |
Micron Technology Inc
Technology
|
Reduced | 19,217,236 | $22,182,263,342 | 13.12% | |
| LLY |
ELI LILLY & Co
Healthcare
|
Reduced | 9,172,904 | $11,002,257,162 | 6.51% | |
| INTC |
Intel Corp
Technology
|
Reduced | 75,250,958 | $10,507,291,265 | 6.21% | |
| KLAC |
Kla Corp
Technology
|
Added | 20,536,730 | $6,196,136,808 | 3.66% | |
| GOOGL |
Alphabet Inc.
Communication Services
|
Reduced | 14,859,769 | $5,310,435,647 | 3.14% | |
| FLEX |
Flex Ltd.
Technology
|
Reduced | 23,358,875 | $3,785,772,871 | 2.24% | |
| AZN |
Astrazeneca PLC
Healthcare
|
Reduced | 18,095,178 | $3,431,207,652 | 2.03% | |
| NVDA |
Nvidia Corp
Technology
|
Reduced | 17,079,180 | $3,417,373,126 | 2.02% | |
| BIIB |
Biogen Inc.
Healthcare
|
Added | 15,154,606 | $3,274,304,172 | 1.94% | |
| AMZN |
Amazon Com Inc
Consumer Cyclical
|
Reduced | 11,962,188 | $2,851,067,887 | 1.69% | |
| MSFT |
Microsoft Corp
Technology
|
Reduced | 7,140,870 | $2,663,687,327 | 1.58% | |
| TSLA |
Tesla, Inc.
Consumer Cyclical
|
Reduced | 6,103,030 | $2,566,934,418 | 1.52% | |
| FDX |
Fedex Corp
Industrials
|
Reduced | 8,156,799 | $2,554,138,470 | 1.51% | |
| TXN |
Texas Instruments Inc
Technology
|
Reduced | 8,514,989 | $2,538,062,771 | 1.50% | |
| LUV |
Southwest Airlines Co
Industrials
|
Added | 48,797,725 | $2,509,179,019 | 1.48% | |
| AMGN |
Amgen Inc
Healthcare
|
Reduced | 6,756,962 | $2,446,831,079 | 1.45% | |
| SCHW |
Schwab Charles Corp
Financial Services
|
Added | 25,120,895 | $2,317,904,981 | 1.37% | |
| UAL |
United Airlines Holdings, Inc.
Industrials
|
Added | 16,461,630 | $2,238,617,063 | 1.32% | |
| BSX |
Boston Scientific Corp
Healthcare
|
Added | 50,520,914 | $2,156,232,609 | 1.28% | |
| ROST |
Ross Stores, Inc.
Consumer Cyclical
|
Reduced | 9,104,980 | $1,937,994,993 | 1.15% | |
| GOOG |
Alphabet Inc.
Communication Services
|
Reduced | 5,399,060 | $1,907,649,869 | 1.13% | |
| BABA |
Alibaba Group Holding Ltd
Consumer Cyclical
|
Reduced | 18,611,306 | $1,786,313,149 | 1.06% | |
| DAL |
Delta Air Lines, Inc.
Industrials
|
Reduced | 17,521,167 | $1,641,032,501 | 0.97% | |
| V |
Visa Inc.
Financial Services
|
Added | 4,268,491 | $1,464,476,577 | 0.87% | |
| BMY |
Bristol Myers Squibb Co
Healthcare
|
Reduced | 24,923,900 | $1,436,115,118 | 0.85% | |
| TJX |
Tjx Companies Inc /De/
Consumer Cyclical
|
Reduced | 9,476,020 | $1,435,617,030 | 0.85% | |
| ONC |
BeOne Medicines Ltd.
Healthcare
|
Added | 5,007,931 | $1,427,110,097 | 0.84% | |
| RJF |
Raymond James Financial Inc
Financial Services
|
Reduced | 9,242,552 | $1,405,145,180 | 0.83% | |
| NTAP |
NetApp, Inc.
Technology
|
Reduced | 9,016,690 | $1,395,422,944 | 0.83% | |
| GSK |
GSK plc
Healthcare
|
Reduced | 25,182,068 | $1,320,044,004 | 0.78% | |
| AAL |
American Airlines Group Inc.
Industrials
|
Added | 70,732,954 | $1,278,144,478 | 0.76% | |
| BIDU |
Baidu, Inc.
Communication Services
|
Reduced | 11,010,100 | $1,258,344,329 | 0.74% | |
| ADI |
Analog Devices Inc
Technology
|
Reduced | 3,128,329 | $1,242,478,428 | 0.73% | |
| JBL |
Jabil Inc
Technology
|
Reduced | 3,167,120 | $1,220,861,417 | 0.72% | |
| COP |
Conocophillips
Energy
|
Added | 11,588,365 | $1,204,726,425 | 0.71% | |
| SONY |
Sony Group Corp
Technology
|
Added | 59,603,230 | $1,195,640,793 | 0.71% | |
| ELAN |
Elanco Animal Health Inc
Healthcare
|
Reduced | 45,445,012 | $1,118,401,745 | 0.66% | |
| JPM |
Jpmorgan Chase & Co
Financial Services
|
Reduced | 3,382,627 | $1,107,235,295 | 0.65% | |
| ADBE |
Adobe Inc.
Technology
|
Added | 5,227,139 | $1,071,668,037 | 0.63% | |
| NTRS |
Northern Trust Corp
Financial Services
|
Reduced | 6,100,742 | $1,060,552,989 | 0.63% | |
| GLW |
Corning Inc /Ny
Technology
|
Reduced | 4,131,872 | $1,055,404,064 | 0.62% | |
| NVS |
Novartis AG
Healthcare
|
Reduced | 6,592,124 | $1,033,117,673 | 0.61% | |
| TMO |
Thermo Fisher Scientific Inc.
Healthcare
|
Reduced | 1,982,271 | $993,831,388 | 0.59% | |
| CAT |
Caterpillar Inc
Industrials
|
Reduced | 871,700 | $928,273,330 | 0.55% | |
| MRVL |
Marvell Technology, Inc.
Technology
|
Reduced | 2,757,995 | $821,579,130 | 0.49% | |
| BMRN |
Biomarin Pharmaceutical Inc
Healthcare
|
Reduced | 14,190,183 | $811,962,271 | 0.48% | |
| NXT |
Nextpower Inc.
Technology
|
Reduced | 6,688,767 | $796,899,700 | 0.47% | |
| ORCL |
Oracle Corp
Technology
|
Reduced | 5,386,230 | $789,352,006 | 0.47% | |
| HPE |
Hewlett Packard Enterprise Co
Technology
|
Reduced | 17,140,875 | $773,224,871 | 0.46% | |
| AMAT |
Applied Materials Inc /De
Technology
|
Reduced | 1,042,926 | $754,035,498 | 0.45% |
Showing the top 50 of 324 positions. Create a free account to see every position, past quarters, search, filters and CSV export.
Covers the securities this platform tracks: U.S.-listed common stock and the put/call positions reported on it. A 13F can also report security types outside that coverage — preferred shares, bonds, warrants, untracked share classes — so the filing's own declared total can exceed the figures above. The source filing is linked at the top of this table.