Form 4: Amphastar Pharmaceuticals Executive Sells Shares
Insider Transaction (Form 4)
Rong Zhou, SENIOR EVP, PRODUCTION CENTER of Amphastar Pharmaceuticals, Inc., sold 10,000 shares of common stock on September 16, 2026 for $23.94 per share.
Summary
- Option exercise/conversion: acquired 10,000 Common Stock at $13.35 ($133,500) on September 16, 2026; holds 179,203 after (Direct).
- Open-market sale: disposed of 10,000 Common Stock at $23.94 ($239,404) on September 16, 2026; holds 169,203 after (Direct).
- Option exercise/conversion: disposed of 10,000 Employee Stock Option (right to buy) on September 16, 2026; holds 19,424 after (Direct).
Sentiment
Score: 4
Explanation: StockSavvy.ai views this as a mildly negative signal: an insider sold $239,404 of stock on the open market.
Insider Transactions
Rong Zhou — Officer (SENIOR EVP, PRODUCTION CENTER)
| Date | Transaction | Security | Shares | Price | Value | Held After |
|---|---|---|---|---|---|---|
| 2026-09-16 | Option exercise/conversion | Common Stock | 10,000 | $13 | $133.5K | 179,203 |
| 2026-09-16 | Open-market sale | Common Stock | 10,000 | $24 | $239.4K | 169,203 |
| 2026-09-16 | Option exercise/conversion | Employee Stock Option (right to buy) | 10,000 | — | — | 19,424 |
Key Dates
| Date | Description |
|---|---|
| 2026-09-16 | Option exercise/conversion (10,000 shares) |
| 2026-09-16 | Open-market sale (10,000 shares) |
| 2026-09-16 | Option exercise/conversion (10,000 shares) |
Keywords
insider transaction, Form 4, AMPH, Amphastar Pharmaceuticals, Inc., bearish, Rong Zhou
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