4 institutions reported holding $6.9M of NISOURCE INC (NI-PB) in SEC 13F filings for 2026-06-30. Largest institutional holders: SIMPLEX TRADING, LLC ($4.9M), IMC-Chicago, LLC ($1.4M), GROUP ONE TRADING LLC ($542,070), HUNTINGTON NATIONAL BANK ($3). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SIMPLEX TRADING, LLC | $4.9M | 104,100 | Added |
| 2 | IMC-Chicago, LLC | $1.4M | 29,200 | Added |
| 3 | GROUP ONE TRADING LLC | $542,070 | 11,400 | Trimmed |
| 4 | HUNTINGTON NATIONAL BANK | $3 | 1 | Hold |
Source: SEC Form 13F filings · as of 2026-06-30