1,706 institutions reported holding $38.15B of ISHARES TR (MUB) in SEC 13F filings for 2026-03-31. Largest institutional holders: BANK OF AMERICA CORP /DE/ ($4.47B), FMR LLC ($2.33B), Betterment LLC ($2.08B), ENVESTNET ASSET MANAGEMENT INC ($1.77B), Creative Planning ($1.53B). Source: SEC Form 13F.
Source: SEC Form 13F filings · as of 2026-03-31