PRIMECAP MANAGEMENT CO CA
Q1 2026 Form 13-F
PASADENA, CALIFORNIA
CIK 0000763212
· CRD 105516
· SEC-registered investment adviser
$127.0B Reported Value Total
PRIMECAP MANAGEMENT CO reports 18 total accounts under management (AUM). There are 18 discretionary accounts valued at $139,344,370,550, and 0 non-discretionary accounts.
Source: Form ADV filed * Note that certain holdings are exempt from Form 13-F reporting, so the AUM totals may be greater than the Form 13-F total.
Source: Form ADV filed 2026-07-29
Reported value
$127.0B
Quarter over quarter
-2.8%
Holdings
320
Top-10 concentration
33.5%
Key People
Form ADV owners & control persons
Joel Paul Fried
CHAIRMAN
Mohammed Mohsin Ansari
VICE CHAIRMAN
Theofanis A Kolokotrones
CHAIRMAN EMERITUS
Filing Navigation
Coverage begins with the second quarter of 2013. Earlier quarters are not shown while their accuracy is being verified.
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Q1 2026 13F record
Q1 2026 13F filing summary
| Period of report | March 31, 2026 |
|---|---|
| Filed | May 11, 2026 |
| Form | 13F-HR |
| Reported value | $127.0B |
| Positions | 320 |
| Change in reported value | -3.9% |
| New positions | 9 |
| Exited positions | 8 |
| Position turnover | 5.2% |
| Top-10 concentration | 33.5% |
13F filings by quarter
| Quarter | Positions | Value |
|---|---|---|
|
Q2 2026 13F
Filed Aug 14, 2026
|
324 | $169.1B |
|
Q1 2026 13F
Filed May 11, 2026
|
320 | $127.0B |
|
Q4 2025 13F
Filed Feb 11, 2026
|
319 | $132.1B |
|
Q3 2025 13F
Filed Nov 12, 2025
|
327 | $130.6B |
|
Q2 2025 13F
Filed Aug 11, 2025
|
333 | $126.2B |
|
Q1 2025 13F
Filed May 9, 2025
|
335 | $121.0B |
|
Q4 2024 13F
Filed Feb 10, 2025
|
329 | $129.1B |
|
Q3 2024 13F
Filed Nov 8, 2024
|
336 | $136.0B |
|
Q2 2024 13F
Filed Aug 9, 2024
|
332 | $138.1B |
|
Q1 2024 13F
Filed May 14, 2024
|
335 | $134.1B |
|
Q4 2023 13F
Filed Feb 9, 2024
|
334 | $126.3B |
|
Q3 2023 13F
Filed Nov 13, 2023
|
331 | $118.5B |
|
Q2 2023 13F
Filed Aug 11, 2023
|
328 | $119.7B |
|
Q1 2023 13F
Filed May 15, 2023
|
331 | $114.7B |
|
Q4 2022 13F
Filed Feb 13, 2023
|
334 | $109.2B |
|
Q3 2022 13F
Filed Nov 14, 2022
|
335 | $103.3B |
|
Q2 2022 13F
Filed Aug 11, 2022
|
341 | $111.9B |
|
Q1 2022 13F
Filed May 11, 2022
|
339 | $132.6B |
|
Q4 2021 13F
Filed Feb 11, 2022
|
342 | $144.5B |
|
Q3 2021 13F
Filed Nov 12, 2021
|
337 | $141.7B |
33 earlier quarters on file — choose one from the quarter menu above.
Top 20 holdings · Q1 2026
| # | Holding | Reported value | % of portfolio |
|---|---|---|---|
| 1 | LLY ELI LILLY & CO | $8.5B | 6.68% |
| 2 | MU MICRON TECHNOLOGY INC | $7.4B | 5.82% |
| 3 | GOOGL ALPHABET INC | $4.3B | 3.39% |
| 4 | AZN ASTRAZENECA PLC | $3.6B | 2.83% |
| 5 | KLAC KLA CORP | $3.6B | 2.83% |
| 6 | INTC INTEL CORP | $3.3B | 2.63% |
| 7 | AMGN AMGEN INC | $3.1B | 2.46% |
| 8 | NVDA NVIDIA CORPORATION | $3.0B | 2.36% |
| 9 | FDX FEDEX CORP | $3.0B | 2.33% |
| 10 | BIIB BIOGEN INC | $2.7B | 2.13% |
| 11 | MSFT MICROSOFT CORP | $2.7B | 2.12% |
| 12 | AMZN AMAZON COM INC | $2.5B | 1.99% |
| 13 | BABA ALIBABA GROUP HLDG LTD | $2.3B | 1.85% |
| 14 | TSLA TESLA INC | $2.3B | 1.79% |
| 15 | SCHW SCHWAB CHARLES CORP | $2.2B | 1.73% |
| 16 | BSX BOSTON SCIENTIFIC CORP | $2.0B | 1.61% |
| 17 | ROST ROSS STORES INC | $2.0B | 1.56% |
| 18 | TXN TEXAS INSTRS INC | $1.9B | 1.48% |
| 19 | LUV SOUTHWEST AIRLS CO | $1.8B | 1.39% |
| 20 | FLEX FLEXTRONICS INTL LTD | $1.7B | 1.31% |
Values as reported on the Q1 2026 Form 13F. Every position is in the holdings table below.