472 institutions reported holding $6.45B of SPDR SERIES TRUST (SPTS) in SEC 13F filings for 2026-03-31. Largest institutional holders: Municipal Employees' Retirement System of Michigan ($819.5M), STATE STREET CORP ($372.0M), IMC-Chicago, LLC ($343.7M), GLOBALT Investments LLC / GA ($295.8M), COMPASS ROSE ASSET MANAGEMENT, LP ($290.9M). Source: SEC Form 13F.
Source: SEC Form 13F filings · as of 2026-03-31