Zhou Rong 4
4 · Amphastar Pharmaceuticals, Inc. · Filed Dec 18, 2025
Insider Transaction Report
Form 4
Zhou Rong
SENIOR EVP, PRODUCTION CENTER
Transactions
- Exercise/Conversion
Common Stock
2025-12-17$11.33/sh+9,787$110,887→ 147,830 total - Sale
Common Stock
2025-12-17$26.20/sh−9,787$256,379→ 138,043 total - Exercise/Conversion
Employee Stock Option (right to buy)
2025-12-17−9,787→ 0 totalExercise: $11.33Exp: 2026-03-17→ Common Stock (9,787 underlying)
Holdings
- 99,668(indirect: See footnote)
Common Stock
- 5,000(indirect: See footnote)
Common Stock
Footnotes (5)
- [F1]Includes 545 shares acquired on May 31, 2025 and one share acquired on November 30, 2025 under the Issuer's 2014 Employee Stock Purchase Plan.
- [F2]The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.97 to $26.50, 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.
- [F3]The shares are held of record by the Zhou Family Trust for which the reporting person serves as a trustee.
- [F4]The shares are held of record by the reporting person's spouse.
- [F5]Shares subject to the option are fully vested and immediately exercisable.