PRIMECAP MANAGEMENT CO/CA/ is an institutional investment manager that files quarterly 13F reports with the SEC. As of Q2 2026, the fund manages $169.1B in reported equity holdings across 324 positions. The largest holdings are MU (13.1%), LLY (6.5%), INTC (6.2%), KLAC (3.7%), GOOG (3.1%). The portfolio is concentrated in Other (83.6%), Technology (4.7%), Communication Services (3.5%). Data sourced from SEC EDGAR 13F filings (CIK 763212).