Amphastar Pharmaceuticals, Inc. (AMPH)
Nasdaq: AMPH · Pharmaceutical Preparations · Rancho Cucamonga, CA · filing with the SEC since 2005
Grade6.5
◀ Past 7.8● Present 7.4▶ Future 4.1
Who runs Amphastar Pharmaceuticals, Inc.
Officers and directors as they report to the SEC on Forms 3, 4 and 5, named as filedChief executive, as filed
Zhang Jack Y.
CEO & CHIEF SCIENTIFIC OFFICER. First filing Jun 2014, latest Mar 17, 2026, 11 filings in all.
Officers reporting now
6
of 13 people with a filing in the last fifteen months
Directors reporting now
7
17 people on the record since 2014
Officerssales are open-market, Nov 6, 2025 to Nov 6, 2026
| Name | Title as filed | First filing | Latest filing | Sales, 12 months |
|---|---|---|---|---|
| Peters William J | CFO, EVP & TREASURER | Jun 2014 | Nov 6, 2026 | 4 · $1.1M |
| Zhou Rong | SENIOR EVP, PRODUCTION CENTER | Jun 2015 | Sep 17, 2026 | 3 · $600,000 |
| Gerst Diane G. | EVP, QA & Regulatory Affairs | Jun 2014 | Jun 3, 2026 | none |
| Zhang Jack Y. | CEO & CHIEF SCIENTIFIC OFFICER | Jun 2014 | Mar 17, 2026 | none |
| Luo Mary Z. | COO, Chief Scientist, Chairman | Jun 2014 | Mar 17, 2026 | none |
| Liawatidewi Yakob | EVP CORP ADMIN CENTER | Jun 2018 | Mar 17, 2026 | none |
Directorssales are open-market, Nov 6, 2025 to Nov 6, 2026
| Name | Role | First filing | Latest filing | Sales, 12 months |
|---|---|---|---|---|
| Prins Richard K | director | Jun 2014 | Aug 12, 2026 | 2 · $300,000 |
| Pierce Anthony T | director | Jul 2026 | Jul 13, 2026 | none |
| Deflin Gayle | director | Jun 2021 | Jun 3, 2026 | none |
| Gaugh David Russell | director | Jul 2025 | Jun 3, 2026 | none |
| Lee Howard | director | Jun 2014 | Jun 3, 2026 | none |
| Zasloff Michael A | director | Jun 2014 | Jun 3, 2026 | none |
| Petersen Floyd F. | director | Jun 2014 | Dec 15, 2025 | 3 · $500,000 |
Earlier names on the record5, newest filing first
A person is listed as reporting now after a filing in the last fifteen months. The record shows when someone last filed; it does not say why they stopped. Each name links to the filings on sec.gov.