624 institutions reported holding $8.85B of SPDR SERIES TRUST (SPIB) in SEC 13F filings for 2026-03-31. Largest institutional holders: LPL Financial LLC ($1.74B), CHARLES SCHWAB INVESTMENT MANAGEMENT INC ($641.6M), Municipal Employees' Retirement System of Michigan ($392.6M), ENVESTNET ASSET MANAGEMENT INC ($386.8M), American Family Investments, Inc. ($341.4M). Source: SEC Form 13F.
Source: SEC Form 13F filings · as of 2026-03-31