BLAIR WILLIAM & CO/IL is an institutional investment manager that files quarterly 13F reports with the SEC. As of Q4 2025, the fund manages $37.3B in reported equity holdings across 1867 positions. The largest holdings are MSFT (4.6%), AAPL (4.3%), AMZN (3.8%), NVDA (2.8%), GOOGL (2.6%). The portfolio is concentrated in Other (88.2%), Communication Services (4.0%), Technology (2.0%). Data sourced from SEC EDGAR 13F filings (CIK 902367).