Institutional Holdings Report
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC is an institutional investment manager based in CHICAGO, IL reporting approximately $30.3B in 13(f) securities across 413 positions as of Q1 2026. Form 13F is filed quarterly by managers exercising investment discretion over $100 million or more in covered securities; the portfolio value above reflects long positions in exchange-traded equities and related instruments, not total assets under management. This data is sourced from the manager's SEC Form 13F-HR filing on EDGAR.