286 institutions reported holding $511.3M of ADVANSIX INC (ASIX) in SEC 13F filings for 2026-06-30. Largest institutional holders: BlackRock, Inc. ($48.5M), VANGUARD GROUP INC ($35.3M), CastleKnight Management LP ($31.6M), DIMENSIONAL FUND ADVISORS LP ($28.0M), AMERICAN CENTURY COMPANIES INC ($27.1M). Source: SEC Form 13F.
Source: SEC Form 13F filings · as of 2026-06-30