SEC Form 4 · accession 0001645326-26-000012
Amphastar Pharmaceuticals, Inc. · AMPH
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Rong Zhou
Officer — SENIOR EVP, PRODUCTION CENTER
Period of report
Sep 2, 2026
Accepted (ET)
Sep 3, 2026 · 7:42 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,F2 | Sep 2, 2026 | S | 3,187 | $23.6291 | D | 169,203 | D | |
| Common StockF3 | holding | — | — | — | 99,668 | I | See footnote | |
| Common StockF4 | holding | — | — | — | 5,000 | I | See footnote |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.62 to $23.69, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
- F2Includes 836 shares acquired on May 31, 2026 under the Issuer's 2014 Employee Stock Purchase Plan.
- F3The shares are held of record by the Zhou Family Trust for which the reporting person serves as a trustee.
- F4The shares are held of record by the reporting person's spouse.