PRIMECAP Management 13F Holdings
PRIMECAP Management Company. Pasadena-based growth fund manager. Runs Odyssey Funds.
As of the latest Q1 2026 filing, PRIMECAP Management (managing PRIMECAP Management Company) reported a public portfolio value of $127.0B with 320 positions. The top recent buy was AZN. The top recent sell was LLY.
Open interactive portfolioPRIMECAP Management 13F portfolio overview
PRIMECAP Management's Q1 2026 13F holdings show PRIMECAP Management Company reporting 320 positions with a disclosed portfolio value of $127.0B. For readers searching PRIMECAP Management 13F holdings, PRIMECAP Management portfolio, or PRIMECAP Management Company holdings, the latest top holdings include ELI LILLY &, MICRON TECHNOLOGY, Alphabet, ASTRAZENECA, and KLA.
The three largest reported positions add up to roughly 15.9%, which helps readers judge portfolio concentration rather than just headline AUM. The largest reported sector exposure is Information Technology at 26.2% of the disclosed portfolio. This makes the page useful for comparing the manager's actual disclosed exposure with market narratives around the same names.
The latest change data highlights reported buys such as ASTRAZENECA, SCHWAB CHARLES, BOSTON SCIENTIFIC, CONOCOPHILLIPS, and BRISTOL-MYERS SQUIBB and reported reductions or exits such as ELI LILLY &, MICRON TECHNOLOGY, Alphabet, KLA, and ASTRAZENECA. Those changes should be read as historical disclosure signals, not as real-time trade alerts.
The filing metadata lists report date 2026-03-31, filing date 2026-05-11, SEC accession 0000763212-26-000016. SEC 13F reports are normally published up to 45 days after quarter end, so the data is best used to understand institutional positioning after the fact rather than to infer today's exact portfolio.
Top reported holdings
| Holding | Reported value | Weight | Quarter change |
|---|---|---|---|
| LLY whale holders ELI LILLY & CO | $8.48B | 6.7% | Reduced |
| MU whale holders MICRON TECHNOLOGY INC | $7.39B | 5.8% | Reduced |
| GOOGL whale holders ALPHABET INC | $4.31B | 3.4% | Reduced |
| AZN whale holders ASTRAZENECA PLC | $3.59B | 2.8% | New |
| KLAC whale holders KLA CORP | $3.59B | 2.8% | Reduced |
| INTC whale holders INTEL CORP | $3.34B | 2.6% | Reduced |
| AMGN whale holders AMGEN INC | $3.12B | 2.5% | Reduced |
| NVDA whale holders NVIDIA CORPORATION | $3.00B | 2.4% | Reduced |
| FDX whale holders FEDEX CORP | $2.96B | 2.3% | Reduced |
| BIIB whale holders BIOGEN INC | $2.71B | 2.1% | Reduced |
Top buys
- AZN whale holders — ASTRAZENECA PLC ($3.59B)
- SCHW whale holders — SCHWAB CHARLES CORP ($2.20B)
- BSX whale holders — BOSTON SCIENTIFIC CORP ($2.04B)
- COP whale holders — CONOCOPHILLIPS ($1.53B)
- BMY whale holders — BRISTOL-MYERS SQUIBB CO ($1.52B)
- GLAXF whale holders — GSK PLC ($1.39B)
Top sells
- LLY whale holders — ELI LILLY & CO ($8.48B)
- MU whale holders — MICRON TECHNOLOGY INC ($7.39B)
- GOOGL whale holders — ALPHABET INC ($4.31B)
- KLAC whale holders — KLA CORP ($3.59B)
- AZN whale holders — ASTRAZENECA PLC ($3.39B)
- INTC whale holders — INTEL CORP ($3.34B)
Allocation
- Information Technology: 26.2%
- Health Care: 21.4%
- Industrials: 11.6%
- Consumer Discretionary: 10.4%
- Financials: 7.7%
- Communication Services: 6.8%
- Energy: 2.4%
- Other: 2.2%
Data notes
Report date: 2026-03-31
Disclosure source: SEC 13F
13F filings are delayed public disclosures and do not include every asset class, short positions, or real-time trades.
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- Seth Klarman 13F portfolio — Baupost Group
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- Brad Gerstner 13F portfolio — Altimeter Capital
- Nelson Peltz 13F portfolio — Trian Fund Management
- Horizon Kinetics 13F portfolio — Horizon Kinetics Asset Management
- Robert Robotti 13F portfolio — Robotti & Co
- George Soros 13F portfolio — Soros Fund Management
- Greenwoods 13F portfolio — Greenwoods Asset Management
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Frequently asked questions
What is PRIMECAP Management buying?
The latest tracked change data for PRIMECAP Management highlights reported buys such as ASTRAZENECA, SCHWAB CHARLES, BOSTON SCIENTIFIC, and CONOCOPHILLIPS. Because 13F data is historical, use it as a research trail rather than a live trade alert.
PRIMECAP Management 13F portfolio
The Q1 2026 SEC 13F profile for PRIMECAP Management and PRIMECAP Management Company shows 320 reported positions, $127.0B in disclosed portfolio value, and top holdings including ELI LILLY &, MICRON TECHNOLOGY, Alphabet, ASTRAZENECA, and KLA.
PRIMECAP Management Company holdings
PRIMECAP Management Company holdings are summarized from public disclosures with reported values, weights, top buys, top sells, and filing metadata where available.
How delayed is PRIMECAP Management's 13F data?
SEC Form 13F requires institutional investment managers with $100M+ in US equities to disclose their holdings quarterly. Read our comprehensive 13F guide.