4
Changes in Ownership
Amphastar Pharmaceuticals, Inc. Filed Acc 0000889740-26-000007
CEO & CHIEF SCIENTIFIC OFFICER gave up 12,692 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 | 2026-03-15 | Shares withheld for taxes | −9,784 | $18.18 | $177,873 | 2,990,052 | D |
| Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | 2026-03-15 | Shares withheld for taxes | −2,908 | $18.18 | $52,867 | 1,245,125 | I |
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