§ 13F · FUND PROFILE
PRIMECAP MANAGEMENT CO/CA/.
Concentrated growth, low turnover
AUM · $126189.1T (13F)Positions · 333Turnover · 91% · Q4Filed · Feb 11, 2026
CONCENTRATION
33%
Top 10 holdings
NEW BUYS
+10
+$204.9T deployed
EXITS
0
No exits
SECTOR SHIFT
TECHNOLOGY → PHARMACEUTICALS
-2pp · +2pp
3YR HIT RATE
—
Top-5 overlap
§ 01 · TOP HOLDINGS
The book · Q4 2025
FILED FEB 11, 2026
| # | Ticker | Name | Shares | $ value | % port | Δ Q4 |
|---|---|---|---|---|---|---|
| 1 | LLY | ELI LILLY & CO | 9.27M | $9957.8T | 7.5% | −14% |
| 2 | MU | MICRON TECHNOLOGY INC | 24.79M | $7076.7T | 5.4% | −16% |
| 3 | GOOGL | ALPHABET INC | 15.13M | $4735.2T | 3.6% | −4% |
| 4 | MSFT | MICROSOFT CORP | 7.29M | $3524.4T | 2.7% | −13% |
| 5 | KLAC | KLA CORP | 2.88M | $3494.5T | 2.6% | −19% |
| 6 | AZN | ASTRAZENECA PLC | 36.92M | $3393.6T | 2.6% | −7% |
| 7 | NVDA | NVIDIA CORPORATION | 17.23M | $3212.9T | 2.4% | −8% |
| 8 | BSX | BOSTON SCIENTIFIC CORP | 31.10M | $2965.0T | 2.2% | −6% |
| 9 | AMGN | AMGEN INC | 8.90M | $2914.7T | 2.2% | −8% |
| 10 | TSLA | TESLA INC | 6.32M | $2841.1T | 2.2% | −5% |
§ 02 · SECTOR ALLOCATION
Where the money is
Other44.6% (−1pp)
Semiconductors16.7% (+1pp)
Pharmaceuticals13.7% (+2pp)
Technology9.0% (−2pp)
Retail8.3% (±0)
Media7.6% (+1pp)
§ 03 · THE PRIMECAP SIGNAL
AC read
PRIMECAP MANAGEMENT CO/CA/ is a Quality / Compounder fund managing $126189120.7 trillion in assets. The fund runs a broad portfolio of 333 positions, broad diversification across holdings, with the top 10 accounting for 33%. Trading activity is aggressive at 91% quarterly turnover, with 10 new positions and 0 exits last quarter. Top sector allocations: Other (45%), Semiconductors (17%), Pharmaceuticals (14%).
Read the full dossier →§ 04 · FILING HISTORY
Q-by-Q deltas
1 FILINGS
Q4 2025
Busy quarter
+10 buys · −0 exits · 281 changed
Q3 2025
Steady book
+0 buys · −0 exits · 0 changed
Q2 2025
Steady book
+0 buys · −0 exits · 0 changed
Q1 2025
Steady book
+0 buys · −0 exits · 0 changed