Primecap Management Co reported 319 positions worth $168.37B for the quarter ended Jun 30, 2026, up 33.3% on the prior quarter. It opened 10 new positions, added to 80, trimmed 176 and exited 3. Its largest holding is Micron Technology Inc at 13.2% of the portfolio.
Reported 13F market value at each quarter end. A change mixes trading with price moves in the positions held.
Dollar value of shares bought and sold each quarter, at that quarter’s price. It counts trading only, not price changes.
How many positions were opened, added to, trimmed or closed each quarter.
Share of reported value in each sector at every quarter end.
| Holding | Change | Trade Value | Weight |
|---|---|---|---|
| BSX Boston Scientific Corp | +17.99M +55.3% | $767.86M | 1.28% |
| FDXF FedEx Freight Holding Company, Inc. | +4.05M | $611.35M | 0.363% |
| AAL American Airlines Group Inc. | +21.74M +44.4% | $392.90M | 0.759% |
| ILMN Illumina, Inc. | +1.45M +70.0% | $254.49M | 0.367% |
| SPCX Space Exploration Technologies Corp | +1.41M | $240.53M | 0.143% |
| MRSH Marsh & Mclennan Companies, Inc. | +1.43M +199.0% | $237.93M | 0.212% |
| SCHW Schwab Charles Corp | +1.68M +7.2% | $154.92M | 1.38% |
| ADBE Adobe Inc. | +496.3K +10.5% | $101.75M | 0.636% |
| UAL United Airlines Holdings, Inc. | +711.0K +4.5% | $96.69M | 1.33% |
| BAH Booz Allen Hamilton Holding Corp | +1.57M +32.5% | $95.12M | 0.231% |
| Holding | Change | Trade Value | Weight |
|---|---|---|---|
| MU Micron Technology Inc | -2.66M -12.1% | $3.07B | 13.17% |
| KLAC Kla Corp | -3.84M -15.8% | $1.16B | 3.68% |
| AMGN Amgen Inc | -2.12M -23.9% | $766.67M | 1.45% |
| TXN Texas Instruments Inc | -1.14M -11.8% | $339.73M | 1.51% |
| FLEX Flex Ltd. | -2.02M -8.0% | $328.12M | 2.25% |
| GS Goldman Sachs Group Inc | -152.5K -99.3% | $154.23M | <0.01% |
| NVS Novartis Ag | -975.2K -12.9% | $152.84M | 0.614% |
| GOOG Alphabet Inc. | -321.9K -5.6% | $113.72M | 1.13% |
| AMAT Applied Materials Inc | -131.2K -11.2% | $94.86M | 0.448% |
| QCOM Qualcomm Inc | -466.3K -66.1% | $86.17M | 0.026% |
| Holding | Shares | Trade Value | Weight |
|---|---|---|---|
| FDXF FedEx Freight Holding Company, Inc. | +4.05M | $611.35M | 0.363% |
| SPCX Space Exploration Technologies Corp | +1.41M | $240.53M | 0.143% |
| DVN Devon Energy Corp | +1.57M | $64.94M | 0.039% |
| FHN First Horizon Corp | +2.23M | $57.10M | 0.034% |
| HONA Honeywell Aerospace Inc. | +244.1K | $53.97M | 0.032% |
| MCK Mckesson Corp | +20.0K | $15.10M | <0.01% |
| FRVO Fervo Energy Co | +475.8K | $13.91M | <0.01% |
| DXCM Dexcom Inc | +192.0K | $12.93M | <0.01% |
| BMNR Bitmine Immersion Technologies, Inc. | +910.1K | $12.11M | <0.01% |
| WING Wingstop Inc. | +36.1K | $6.26M | <0.01% |
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | MU Micron Technology Inc | Technology | 19.22M | $22.18B | 13.17% | -2.66M | -12.1% | Reduced | 1.7% |
| 2 | LLY ELI LILLY & Co | Healthcare | 9.17M | $11.00B | 6.53% | -50.5K | -0.5% | Reduced | 0.97% |
| 3 | INTC Intel Corp | Technology | 75.25M | $10.51B | 6.24% | -511.0K | -0.7% | Reduced | 1.47% |
| 4 | KLAC Kla Corp | Technology | 20.54M | $6.20B | 3.68% | -3.84M | -15.8% | Reduced | 1.57% |
| 5 | GOOGL Alphabet Inc. | Technology | 14.86M | $5.31B | 3.15% | -127.7K | -0.9% | Reduced | 0.25% |
| 6 | FLEX Flex Ltd. | Technology | 23.36M | $3.79B | 2.25% | -2.02M | -8.0% | Reduced | 6.32% |
| 7 | AZN Astrazeneca Plc | Healthcare | 18.10M | $3.43B | 2.04% | -118.5K | -0.7% | Reduced | 1.17% |
| 8 | NVDA Nvidia Corp | Technology | 17.08M | $3.42B | 2.03% | -109.1K | -0.6% | Reduced | 0.07% |
| 9 | BIIB Biogen Inc. | Healthcare | 15.15M | $3.27B | 1.94% | +397.0K | +2.7% | Added | 10.26% |
| 10 | AMZN Amazon Com Inc | Consumer Discretionary | 11.96M | $2.85B | 1.69% | -144.9K | -1.2% | Reduced | 0.11% |
| 11 | MSFT Microsoft Corp | Technology | 7.14M | $2.66B | 1.58% | -123.7K | -1.7% | Reduced | 0.1% |
| 12 | TSLA Tesla, Inc. | Consumer Discretionary | 6.10M | $2.57B | 1.52% | -22.5K | -0.4% | Reduced | 0.15% |
| 13 | FDX Fedex Corp | Industrials | 8.16M | $2.55B | 1.52% | -146.2K | -1.8% | Reduced | 3.44% |
| 14 | TXN Texas Instruments Inc | Technology | 8.51M | $2.54B | 1.51% | -1.14M | -11.8% | Reduced | 0.93% |
| 15 | LUV Southwest Airlines Co | Industrials | 48.80M | $2.51B | 1.49% | +1.73M | +3.7% | Added | 9.97% |
Tip. Select a row to see that position’s full history at Primecap Management.
As of its Q2 2026 13F filing, Primecap Management Co’s five largest positions were Micron Technology Inc (MU) at 13.2%, ELI LILLY & Co (LLY) at 6.5%, Intel Corp (INTC) at 6.2%, Kla Corp (KLAC) at 3.7%, Alphabet Inc. (GOOGL) at 3.2% of the reported portfolio.
Primecap Management Co reported a 13F portfolio worth $168.37B across 319 positions for Q2 2026. That is up 33.3% from the previous quarter.
Its largest purchases by value were Boston Scientific Corp ($767.86M), FedEx Freight Holding Company, Inc. ($611.35M), American Airlines Group Inc. ($392.90M). It opened 10 new positions.
Its largest sales by value were Micron Technology Inc ($3.07B), Kla Corp ($1.16B), Amgen Inc ($766.67M). It exited 3 positions entirely.
From the Form 13F-HR reports Primecap Management Co files with the SEC each quarter, within 45 days of quarter end. A 13F lists long positions in US-listed equities and options; it excludes short positions, cash, bonds and most non-US holdings.
13F data reflects long positions in US-listed equities and options as reported to the SEC up to 45 days after quarter end. It excludes short positions, cash, bonds and most non-US securities, so it is not a complete picture of a manager’s assets.