278 institutions reported holding $1.30B of SPDR S&P (SPYX) in SEC 13F filings for 2026-06-30. Largest institutional holders: Windmill Hill Asset Management Ltd ($331.5M), Choate Investment Advisors ($139.2M), Betterment LLC ($121.1M), Bank of New York Mellon Corp ($79.2M), BANK OF AMERICA CORP /DE/ ($66.4M). Source: SEC Form 13F.
Source: SEC Form 13F filings · as of 2026-06-30