4 institutions reported holding $4.2M of ZEVRA THERAPEUTICS INC (KMPH) in SEC 13F filings for 2026-03-31. Largest institutional holders: GROUP ONE TRADING LLC ($2.0M), SIMPLEX TRADING, LLC ($1.9M), SABBY MANAGEMENT, LLC ($316,880), AIGH Capital Management LLC ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GROUP ONE TRADING LLC | $2.0M | 209,700 | Added |
| 2 | SIMPLEX TRADING, LLC | $1.9M | 207,300 | Added |
| 3 | SABBY MANAGEMENT, LLC | $316,880 | 340 | Added |
| 4 | AIGH Capital Management LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31