5 institutions reported holding $8.4M of HARTFORD INSURANCE GROUP INC (HIG.WS) in SEC 13F filings for 2026-03-31. Largest institutional holders: IMC-Chicago, LLC ($3.8M), GROUP ONE TRADING LLC ($2.0M), CenterStar Asset Management, LLC ($1.5M), SIMPLEX TRADING, LLC ($1.1M), SG Americas Securities, LLC ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $3.8M | 27,800 | Added |
| 2 | GROUP ONE TRADING LLC | $2.0M | 15,000 | Trimmed |
| 3 | CenterStar Asset Management, LLC | $1.5M | 11,000 | New |
| 4 | SIMPLEX TRADING, LLC | $1.1M | 8,000 | New |
| 5 | SG Americas Securities, LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31