Stocktoria
Amphastar Pharmaceuticals, Inc. AMPH
Nasdaq · XNAS · stock · Pharmaceutical Preparations · website · IPO 2014-06-25
Amphastar Pharmaceuticals, Inc. insider transactions (Form 4)
| Insider | Role | Date | Action | Shares | Price |
|---|---|---|---|---|---|
| Lee Howard | director | 2026-06-02 | Tax withheld | 769 | $18.45 |
| PRINS RICHARD K | director | 2026-06-01 | Grant | 8,143 | — |
| Lee Howard | director | 2026-06-01 | Grant | 8,143 | — |
| Deflin Gayle | director | 2026-06-01 | Grant | 8,143 | — |
| ZASLOFF MICHAEL A | director | 2026-06-01 | Grant | 8,143 | — |
| Gerst Diane G. | director | 2026-06-01 | Grant | 8,143 | — |
| Gaugh David Russell | director | 2026-06-01 | Grant | 8,143 | — |
| Zhang Jack Y. | CEO & CHIEF SCIENTIFIC OFFICER | 2026-03-15 | Tax withheld | 2,908 | $18.18 |
Source: SEC EDGAR filings · CIK 0001297184 · as of 2025-12-31. Facts from filings plus Stocktoria's own computed scores — not investment advice.