SEC Form 4 · accession 0001611283-26-000003
Amphastar Pharmaceuticals, Inc. · AMPH
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Diane G. Gerst
Director
Period of report
Jun 1, 2026
Accepted (ET)
Jun 3, 2026 · 8:33 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001297184
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1 | Jun 1, 2026 | A | 8,143 | $0.00 | A | 31,899 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stock Option (right to buy)F2 | $18.42 | Jun 1, 2026 | A | 17,365 | A | — | Jun 1, 2036 | Common Stock | 17,365 | 17,365 | D |
Explanation of responses
- F1The reported shares are represented by restricted stock units, or RSUs, all of which vest on June 1, 2027.
- F2All of the shares subject to the option vest on June 1, 2027.