SEC Form 4 · accession 0001263136-26-000012
Amphastar Pharmaceuticals, Inc. · AMPH
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
William J Peters
Officer — CFO, EVP & TREASURER · Director
Period of report
Aug 7, 2026
Accepted (ET)
Aug 11, 2026 · 4:57 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0001297184
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1 | Aug 7, 2026 | M | 5,053 | $19.79 | A | 181,026 | D | |
| Common Stock | Aug 7, 2026 | S | 8,180 | $22.48 | D | 172,846 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Employee Stock Option (right to buy)F3 | $19.79 | Aug 7, 2026 | M | 5,053 | D | — | Mar 15, 2028 | Common Stock | 5,053 | 0 | D |
Explanation of responses
- F1Includes 910 shares acquired on May 31, 2026 under the Issuer's 2014 Employee Stock Purchase Plan.
- F2The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 10, 2026.
- F3Shares subject to the option are fully vested and immediately exercisable.