Insider Transactions Reported by 14 Insiders of Amphastar Pharmaceuticals, Inc.

Symbol
AMPH on Nasdaq
Location
Rancho Cucamonga, CA

Insiders trading volume in the past year

Amphastar Pharmaceuticals, Inc. executives and other stock owners filed with the SEC include:

Name Relationship Holdings Value Past Year Net Change Change % Report Date
Jack Y. Zhang CEO & CHIEF SCIENTIFIC OFFICER, Director, 10%+ Owner $201,720,336 13 Jun 2025
Mary Z. Luo COO,Chief Scientist & Chairman, Director, 10%+ Owner $63,239,930 10 Jan 2024
Richard Koo Director $15,350,254 07 Jun 2021
Howard Lee Director $3,952,895 02 Jun 2025
Rong Zhou Senior Evp, Production Center $3,754,610 -$256,379 -6.4% 17 Dec 2025
WILLIAM J. PETERS CFO, EVP & TREASURER, Director $3,098,378 -$116,515 -3.6% 19 May 2025
Yakob Liawatidewi EVP CORP ADMIN CENTER, Director $2,585,360 15 Mar 2025
Floyd F. Petersen Director $1,850,044 -$680,275 -27% 11 Dec 2025
David Maris Director $1,092,746 07 Jun 2021
RICHARD K. PRINS Director $953,480 -$113,253 -11% 25 Nov 2025
ZASLOFF MICHAEL A Director $900,186 02 Jun 2025
Diane G. Gerst Director $724,320 02 Jun 2025
Gayle Deflin Director $332,767 02 Jun 2025
David Russell Gaugh Director $151,989 18 Jul 2025

Recent Insider Transactions by Companies or Individuals for Amphastar Pharmaceuticals, Inc.

Insider Symbol Class Transaction % Value $ * Price $ Shares Shares Owned Date Ownership
* An asterisk sign (*) next to the price indicates that the price is likely invalid.