5 institutions reported holding $192,260 of NRX PHARMACEUTICALS INC (NRXPW) in SEC 13F filings for 2026-03-31. Largest institutional holders: SIMPLEX TRADING, LLC ($177,216), GROUP ONE TRADING LLC ($14,697), WOLVERINE ASSET MANAGEMENT LLC ($347), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($0), UBS Group AG ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SIMPLEX TRADING, LLC | $177,216 | 83,200 | Trimmed |
| 2 | GROUP ONE TRADING LLC | $14,697 | 6,900 | Trimmed |
| 3 | WOLVERINE ASSET MANAGEMENT LLC | $347 | 23,593 | Added |
| 4 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $0 | 0 | Exited |
| 5 | UBS Group AG | $0 | 13 | Trimmed |
Source: SEC Form 13F filings · as of 2026-03-31