Primecap Management Co 13F Holdings
Primecap Management Co's holdings from its Form 13F-HR filing for the quarter ended June 30, 2026, compared with the previous quarter (March 31, 2026). 13F filings list the long U.S. equity positions held by institutional investment managers with over $100 million under management.
Quarter
Q2 2026
Reported 13F value
$169.1B
Largest holding
Micron Technology Inc
Biggest Buys (Q2 2026)
| Security | Change | Value of change | % of portfolio |
|---|---|---|---|
| BOSTON SCIENTIFIC CORP | +17.99M sh | $948.4M | 1.27% |
| FEDEX FGHT HLDG CO INC | New position | $611.3M | 0.36% |
| AMERICAN AIRLINES GROUP INC | +21.74M sh | $313.2M | 0.76% |
| MARSH & MCLENNAN COS INC | +1.43M sh | $242.8M | 0.21% |
| SPACE EXPLORATION TECHN CORP (CLASS A COM STK) | New position | $240.5M | 0.14% |
| ILLUMINA INC | +1.45M sh | $216.4M | 0.37% |
| SCHWAB CHARLES CORP | +1.68M sh | $156.4M | 1.37% |
| CARNIVAL CORP LTD (COMMON SHARES) | New position | $153.2M | 0.09% |
| ADOBE INC | +496,300 sh | $111.2M | 0.63% |
| BOOZ ALLEN HAMILTON HLDG COR (CL A) | +1.57M sh | $108.7M | 0.23% |
Biggest Sells (Q2 2026)
| Security | Change | Value of change | % of portfolio |
|---|---|---|---|
| MICRON TECHNOLOGY INC | -2.66M sh | -$2.0B | 13.12% |
| KLA CORP (COM NEW) | -3.73M sh | -$838.2M | 3.66% |
| AMGEN INC | -2.12M sh | -$755.8M | 1.45% |
| TEXAS INSTRS INC | -1.14M sh | -$280.5M | 1.50% |
| FLEX LTD | -2.02M sh | -$230.3M | 2.24% |
| NOVARTIS AG (SPONSORED ADR) | -975,300 sh | -$150.9M | 0.61% |
| GOLDMAN SACHS GROUP INC | -152,500 sh | -$141.6M | 0.00% |
| CARNIVAL CORP | Sold out | -$138.8M | 0.00% |
| HONEYWELL INTL INC | Sold out | -$110.3M | 0.00% |
| ALPHABET INC (CAP STK CL C) | -321,800 sh | -$103.0M | 1.13% |
Top 50 Holdings
| Security | Value | % of portfolio | Change in shares |
|---|---|---|---|
| MICRON TECHNOLOGY INC | $22.2B | 13.12% | -12.15% |
| ELI LILLY & CO | $11.0B | 6.51% | -0.55% |
| INTEL CORP | $10.5B | 6.21% | -0.67% |
| KLA CORP (COM NEW) | $6.2B | 3.66% | -15.37% |
| ALPHABET INC (CAP STK CL A) | $5.3B | 3.14% | -0.85% |
| FLEX LTD | $3.8B | 2.24% | -7.98% |
| ASTRAZENECA PLC | $3.4B | 2.03% | -0.65% |
| NVIDIA CORPORATION | $3.4B | 2.02% | -0.63% |
| BIOGEN INC | $3.3B | 1.94% | +2.69% |
| AMAZON COM INC | $2.9B | 1.69% | -1.20% |
| MICROSOFT CORP | $2.7B | 1.58% | -1.70% |
| TESLA INC | $2.6B | 1.52% | -0.37% |
| FEDEX CORP | $2.6B | 1.51% | -1.76% |
| TEXAS INSTRS INC | $2.5B | 1.50% | -11.81% |
| SOUTHWEST AIRLS CO | $2.5B | 1.48% | +3.67% |
| AMGEN INC | $2.4B | 1.45% | -23.86% |
| SCHWAB CHARLES CORP | $2.3B | 1.37% | +7.16% |
| UNITED AIRLS HLDGS INC | $2.2B | 1.32% | +4.51% |
| BOSTON SCIENTIFIC CORP | $2.2B | 1.27% | +55.31% |
| ROSS STORES INC | $1.9B | 1.15% | -0.71% |
| ALPHABET INC (CAP STK CL C) | $1.9B | 1.13% | -5.63% |
| ALIBABA GROUP HLDG LTD (SPONSORED ADS) | $1.8B | 1.06% | -0.59% |
| DELTA AIR LINES INC (COM NEW) | $1.6B | 0.97% | -0.16% |
| VISA INC (COM CL A) | $1.5B | 0.87% | +5.13% |
| BRISTOL-MYERS SQUIBB CO | $1.4B | 0.85% | -0.25% |
| TJX COS INC NEW | $1.4B | 0.85% | -1.18% |
| BEONE MEDICINES LTD (SPONSORED ADS) | $1.4B | 0.84% | +0.66% |
| RAYMOND JAMES FINL INC | $1.4B | 0.83% | -1.12% |
| NETAPP INC | $1.4B | 0.83% | -0.45% |
| GSK PLC (SPONSORED ADR) | $1.3B | 0.78% | -0.09% |
| AMERICAN AIRLINES GROUP INC | $1.3B | 0.76% | +44.38% |
| BAIDU INC (SPON ADR REP A) | $1.3B | 0.74% | -0.42% |
| ANALOG DEVICES INC | $1.2B | 0.73% | -0.25% |
| JABIL INC | $1.2B | 0.72% | -3.48% |
| CONOCOPHILLIPS | $1.2B | 0.71% | +0.08% |
| SONY GROUP CORP (SPONSORED ADR) | $1.2B | 0.71% | +1.83% |
| ELANCO ANIMAL HEALTH INC | $1.1B | 0.66% | -0.86% |
| JPMORGAN CHASE & CO | $1.1B | 0.65% | -0.61% |
| ADOBE INC | $1.1B | 0.63% | +10.49% |
| NORTHERN TR CORP | $1.1B | 0.63% | -6.85% |
| CORNING INC | $1.1B | 0.62% | -0.07% |
| NOVARTIS AG (SPONSORED ADR) | $1.0B | 0.61% | -12.89% |
| THERMO FISHER SCIENTIFIC INC | $993.8M | 0.59% | -0.01% |
| CATERPILLAR INC | $928.3M | 0.55% | -0.06% |
| MARVELL TECHNOLOGY INC | $821.6M | 0.49% | -7.29% |
| BIOMARIN PHARMACEUTICAL INC | $812.0M | 0.48% | -0.03% |
| NEXTPOWER INC (CLASS A COM) | $796.9M | 0.47% | -1.07% |
| ORACLE CORP | $789.4M | 0.47% | -5.07% |
| HEWLETT PACKARD ENTERPRISE C | $773.2M | 0.46% | -0.51% |
| APPLIED MATLS INC | $754.0M | 0.45% | -11.17% |
Values are as reported in the filing, adjusted for stock splits. Ranked by market value; options and other non-equity positions may be included where the filing lists them.
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