8 institutions reported holding $261.7M of MP MATERIALS CORP (MP.WS) in SEC 13F filings for 2026-06-30. Largest institutional holders: IMC-Chicago, LLC ($132.2M), GROUP ONE TRADING LLC ($52.5M), SIMPLEX TRADING, LLC ($36.5M), JPMORGAN CHASE & CO ($35.6M), OnyxPoint Global Management LP ($4.2M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $132.2M | 2.4M | Added |
| 2 | GROUP ONE TRADING LLC | $52.5M | 937,600 | Trimmed |
| 3 | SIMPLEX TRADING, LLC | $36.5M | 651,400 | Trimmed |
| 4 | JPMORGAN CHASE & CO | $35.6M | 650,000 | Added |
| 5 | OnyxPoint Global Management LP | $4.2M | 74,800 | Trimmed |
| 6 | HRT FINANCIAL LP | $733,000 | 13,100 | Trimmed |
| 7 | All Terrain Financial Advisors, LLC | $0 | 0 | Exited |
| 8 | Thomist Capital Management, LP | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30