9 institutions reported holding $96.3M of EOS ENERGY ENTERPRISES INC (EOSEW) in SEC 13F filings for 2026-03-31. Largest institutional holders: GROUP ONE TRADING LLC ($54.0M), IMC-Chicago, LLC ($22.1M), SIMPLEX TRADING, LLC ($18.4M), HRT FINANCIAL LP ($1.4M), Skaana Management L.P. ($290,546). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GROUP ONE TRADING LLC | $54.0M | 10.9M | Trimmed |
| 2 | IMC-Chicago, LLC | $22.1M | 4.5M | Trimmed |
| 3 | SIMPLEX TRADING, LLC | $18.4M | 3.7M | Trimmed |
| 4 | HRT FINANCIAL LP | $1.4M | 276,100 | New |
| 5 | Skaana Management L.P. | $290,546 | 500,000 | Trimmed |
| 6 | CIBC Bancorp USA Inc. | $148,800 | 30,000 | Trimmed |
| 7 | JPMORGAN CHASE & CO | $29,447 | 6,700 | New |
| 8 | OSAIC HOLDINGS, INC. | $1,280 | 20 | New |
| 9 | SABBY MANAGEMENT, LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31