4 institutions reported holding $10.2M of ZEVRA THERAPEUTICS INC (KMPH) in SEC 13F filings for 2026-06-30. Largest institutional holders: SIMPLEX TRADING, LLC ($5.0M), GROUP ONE TRADING LLC ($3.2M), IMC-Chicago, LLC ($1.4M), SABBY MANAGEMENT, LLC ($612,318). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SIMPLEX TRADING, LLC | $5.0M | 346,800 | Added |
| 2 | GROUP ONE TRADING LLC | $3.2M | 222,300 | Added |
| 3 | IMC-Chicago, LLC | $1.4M | 97,600 | New |
| 4 | SABBY MANAGEMENT, LLC | $612,318 | 427 | Added |
Source: SEC Form 13F filings · as of 2026-06-30