5 institutions reported holding $3.5M of NISOURCE INC (NI-PB) in SEC 13F filings for 2026-03-31. Largest institutional holders: GROUP ONE TRADING LLC ($2.4M), IMC-Chicago, LLC ($709,232), SIMPLEX TRADING, LLC ($405,942), HUNTINGTON NATIONAL BANK ($3), JPMORGAN CHASE & CO ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GROUP ONE TRADING LLC | $2.4M | 51,800 | Added |
| 2 | IMC-Chicago, LLC | $709,232 | 15,200 | New |
| 3 | SIMPLEX TRADING, LLC | $405,942 | 8,700 | Trimmed |
| 4 | HUNTINGTON NATIONAL BANK | $3 | 1 | Hold |
| 5 | JPMORGAN CHASE & CO | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31