976 institutions reported holding $22.18B of NISOURCE INC (NI) in SEC 13F filings for 2026-06-30. Largest institutional holders: VANGUARD GROUP INC ($3.03B), BlackRock, Inc. ($2.61B), T. Rowe Price Investment Management, Inc. ($1.42B), STATE STREET CORP ($1.31B), GEODE CAPITAL MANAGEMENT, LLC ($611.9M). Source: SEC Form 13F.
Source: SEC Form 13F filings · as of 2026-06-30