Form 4: Amphastar Pharmaceuticals Executive Sells Shares
Insider Transaction (Form 4)
William J Peters, CFO, EVP & TREASURER and a Director of Amphastar Pharmaceuticals, Inc., sold 8,180 shares of common stock on August 7, 2026 for $22.48 per share.
Summary
- Option exercise/conversion: acquired 5,053 Common Stock at $19.79 ($99,999) on August 7, 2026; holds 181,026 after (Direct).
- Open-market sale: disposed of 8,180 Common Stock at $22.48 ($183,886) on August 7, 2026; holds 172,846 after (Direct).
- Option exercise/conversion: disposed of 5,053 Employee Stock Option (right to buy) on August 7, 2026 (Direct).
Sentiment
Score: 4
Explanation: StockSavvy.ai views this as a mildly negative but low-conviction signal: an insider sold $183,886 of stock under a pre-arranged Rule 10b5-1 plan, which is typically routine.
Insider Transactions
William J Peters — Director, Officer (CFO, EVP & TREASURER)
Transaction made under a Rule 10b5-1 trading plan.
| Date | Transaction | Security | Shares | Price | Value | Held After |
|---|---|---|---|---|---|---|
| 2026-08-07 | Option exercise/conversion | Common Stock | 5,053 | $20 | $100.0K | 181,026 |
| 2026-08-07 | Open-market sale | Common Stock | 8,180 | $22 | $183.9K | 172,846 |
| 2026-08-07 | Option exercise/conversion | Employee Stock Option (right to buy) | 5,053 | — | — | 0 |
Key Dates
| Date | Description |
|---|---|
| 2026-08-07 | Option exercise/conversion (5,053 shares) |
| 2026-08-07 | Open-market sale (8,180 shares) |
| 2026-08-07 | Option exercise/conversion (5,053 shares) |
Keywords
insider transaction, Form 4, AMPH, Amphastar Pharmaceuticals, Inc., bearish, William J Peters
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