Primecap Management Co 13F holdings
Primecap Management Co reported 323 positions with a total reported value of $169.1B as of 2026-06-30, in its 13F for Q2 2026, filed 2026-08-14. Top holdings by reported value: MU MICRON TECHNOLOGY INC (13.1%), LLY ELI LILLY & CO (6.5%), INTC INTEL CORP (6.2%), GOOGL ALPHABET INC (4.3%), KLAC KLA CORP (3.7%). Against 2026-03-31 it opened 10 new positions and exited 6. Next 13F due by 2026-11-14, the legal deadline 45 days after the quarter ending 2026-09-30.
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Top holdings
25 largest of 323 positions · reported value as of 2026-06-30
| Holding | Shares | Reported value | % of portfolio |
|---|---|---|---|
| MU MICRON TECHNOLOGY INC | 19,217,236 | $22.2B | 13.1% |
| LLY ELI LILLY & CO | 9,172,904 | $11.0B | 6.5% |
| INTC INTEL CORP | 75,250,958 | $10.5B | 6.2% |
| GOOGL ALPHABET INC | 20,258,829 | $7.2B | 4.3% |
| KLAC KLA CORP | 20,536,730 | $6.2B | 3.7% |
| FLEX FLEX LTD | 23,358,875 | $3.8B | 2.2% |
| AZN ASTRAZENECA PLC | 18,095,178 | $3.4B | 2.0% |
| NVDA NVIDIA CORPORATION | 17,079,180 | $3.4B | 2.0% |
| BIIB BIOGEN INC | 15,154,606 | $3.3B | 1.9% |
| AMZN AMAZON COM INC | 11,962,188 | $2.9B | 1.7% |
| MSFT MICROSOFT CORP | 7,140,870 | $2.7B | 1.6% |
| TSLA TESLA INC | 6,103,030 | $2.6B | 1.5% |
| FDX FEDEX CORP | 8,156,799 | $2.6B | 1.5% |
| TEXAS INSTRS INC | 8,514,989 | $2.5B | 1.5% |
| SOUTHWEST AIRLS CO | 48,797,725 | $2.5B | 1.5% |
| AMGN AMGEN INC | 6,756,962 | $2.4B | 1.4% |
| SCHW SCHWAB CHARLES CORP | 25,120,895 | $2.3B | 1.4% |
| UNITED AIRLS HLDGS INC | 16,461,630 | $2.2B | 1.3% |
| BSX BOSTON SCIENTIFIC CORP | 50,520,914 | $2.2B | 1.3% |
| ROST ROSS STORES INC | 9,104,980 | $1.9B | 1.1% |
| BABA ALIBABA GROUP HLDG LTD | 18,611,306 | $1.8B | 1.1% |
| DAL DELTA AIR LINES INC | 17,521,167 | $1.6B | 1.0% |
| V VISA INC | 4,268,491 | $1.5B | 0.9% |
| BMY BRISTOL-MYERS SQUIBB CO | 24,923,900 | $1.4B | 0.8% |
| TJX COS INC NEW | 9,476,020 | $1.4B | 0.8% |
SEC FORM 13F · Q2 2026 · VALUES AS REPORTED, NOT PRICES
New positions this quarter
Held at 2026-06-30, not at 2026-03-31 · 10 in all · reported value as of 2026-06-30
| Holding | Shares | Reported value | % of portfolio |
|---|---|---|---|
| FEDEX FGHT HLDG CO INC | 4,048,660 | $611.3M | 0.4% |
| SPCX SPACE EXPLORATION TECHN CORP | 1,407,762 | $240.5M | 0.1% |
| DVN DEVON ENERGY CORP NEW | 1,571,690 | $64.9M | <0.1% |
| FHN FIRST HORIZON CORPORATION | 2,227,100 | $57.1M | <0.1% |
| HONA HONEYWELL AEROSPACE INC | 244,100 | $54.0M | <0.1% |
| MCK MCKESSON CORP | 19,990 | $15.1M | <0.1% |
| FRVO FERVO ENERGY CO | 475,800 | $13.9M | <0.1% |
| DXCM DEXCOM INC | 192,000 | $12.9M | <0.1% |
| BMNR BITMINE IMMERSION TECHS INC | 910,100 | $12.1M | <0.1% |
| WING WINGSTOP INC | 36,100 | $6.3M | <0.1% |
Sold out
Held at 2026-03-31, gone by 2026-06-30 · 6 in all · reported value as of 2026-03-31
Biggest increases and decreases
Positions held at both quarter ends, by change in shares · reported value as of 2026-06-30
Increases
| Holding | Shares 2026-03-31 | Shares 2026-06-30 | Change | Reported value |
|---|---|---|---|---|
| KLAC KLA CORP | 2,437,647 | 20,536,730 | +742.5% | $6.2B |
| BSX BOSTON SCIENTIFIC CORP | 32,529,774 | 50,520,914 | +55.3% | $2.2B |
| AAL AMERICAN AIRLINES GROUP INC | 48,989,954 | 70,732,954 | +44.4% | $1.3B |
| ILMN ILLUMINA INC | 2,067,299 | 3,514,649 | +70.0% | $618.0M |
| MRSH MARSH & MCLENNAN COS INC | 717,500 | 2,145,025 | +199.0% | $357.5M |
| SCHW SCHWAB CHARLES CORP | 23,441,915 | 25,120,895 | +7.2% | $2.3B |
| ADBE ADOBE INC | 4,730,846 | 5,227,139 | +10.5% | $1.1B |
| UNITED AIRLS HLDGS INC | 15,750,610 | 16,461,630 | +4.5% | $2.2B |
| BAH BOOZ ALLEN HAMILTON HLDG COR | 4,829,798 | 6,397,644 | +32.5% | $388.1M |
| SOUTHWEST AIRLS CO | 47,069,495 | 48,797,725 | +3.7% | $2.5B |
| FICO FAIR ISAAC CORP | 289,047 | 362,835 | +25.5% | $433.5M |
| BIIB BIOGEN INC | 14,757,607 | 15,154,606 | +2.7% | $3.3B |
Decreases
| Holding | Shares 2026-03-31 | Shares 2026-06-30 | Change | Reported value |
|---|---|---|---|---|
| MU MICRON TECHNOLOGY INC | 21,874,204 | 19,217,236 | -12.1% | $22.2B |
| AMGN AMGEN INC | 8,874,129 | 6,756,962 | -23.9% | $2.4B |
| TEXAS INSTRS INC | 9,654,766 | 8,514,989 | -11.8% | $2.5B |
| FLEX FLEX LTD | 25,383,448 | 23,358,875 | -8.0% | $3.8B |
| DD DUPONT DE NEMOURS INC | 1,997,159 | 521,493 | -73.9% | $70.7M |
| GOOGL ALPHABET INC | 20,708,369 | 20,258,829 | -2.2% | $7.2B |
| GS GOLDMAN SACHS GROUP INC | 153,630 | 1,130 | -99.3% | $1.1M |
| NVS NOVARTIS AG | 7,567,354 | 6,592,124 | -12.9% | $1.0B |
| APPLIED MATLS INC | 1,174,126 | 1,042,926 | -11.2% | $754.0M |
| QCOM QUALCOMM INC | 705,587 | 239,250 | -66.1% | $44.2M |
| WFC WELLS FARGO & CO | 7,723,102 | 6,712,022 | -13.1% | $554.7M |
| NTRS NORTHERN TR CORP | 6,549,037 | 6,100,742 | -6.8% | $1.1B |
CIK 763212 · 13F FILINGS ON EDGAR · INFORMATIONAL ONLY
More 13F data
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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