4
Changes in Ownership
Amphastar Pharmaceuticals, Inc. Filed Acc 0001263136-26-000016
CFO, EVP & TREASURER sold 28,631 shares at an average $28.45 ($814,669)
- CFO, EVP & TREASURER acquired 27,000 shares (option exercise)
- Traded under a Rule 10b5-1 plan
From the SEC's structured data for this filing
Trades in this filing
| Insider | Date | Transaction | Shares | Price | Value | Owned after | D/I |
|---|---|---|---|---|---|---|---|
| PETERS WILLIAM J CFO, EVP & TREASURER | 2026-11-04 | Option exercise 10b5-1 | +16,000 | $13.03 | $208,480 | 184,707 | D |
| PETERS WILLIAM J CFO, EVP & TREASURER | 2026-11-04 | Sale 10b5-1 | −16,000 | $28.03 | $448,480 | 168,707 | D |
| PETERS WILLIAM J CFO, EVP & TREASURER | 2026-11-05 | Option exercise 10b5-1 | +11,000 | $17.99 | $197,890 | 179,707 | D |
| PETERS WILLIAM J CFO, EVP & TREASURER | 2026-11-05 | Sale 10b5-1 | −12,631 | $28.99 | $366,189 | 167,076 | D |
| Derivatives | |||||||
| PETERS WILLIAM J CFO, EVP & TREASURER | 2026-11-04 | Option exercise · Employee Stock Option (right to buy) 10b5-1 | −16,000 | 7,674 | D | ||
| PETERS WILLIAM J CFO, EVP & TREASURER | 2026-11-05 | Option exercise · Employee Stock Option (right to buy) 10b5-1 | −11,000 | 67,833 | D | ||
| Open-market sales · 28,631 sh · avg $28.45 · $814,669 | |||||||
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