4
Changes in Ownership
Amphastar Pharmaceuticals, Inc. Filed Acc 0001104659-26-024842
CEO & CHIEF SCIENTIFIC OFFICER gave up 8,201 shares (to pay taxes)
From the SEC's structured data for this filing
Trades in this filing
| Insider | Date | Transaction | Shares | Price | Value | Owned after | D/I |
|---|---|---|---|---|---|---|---|
| Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | 2026-03-04 | Shares withheld for taxes | −5,769 | $19.96 | $115,149 | 2,841,890 | D |
| Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | 2026-03-04 | Shares withheld for taxes | −2,432 | $19.96 | $48,543 | 1,183,043 | I |
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