CIK 0001297184 · Large accelerated filer
Amphastar Pharmaceuticals, Inc.
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- AMPH
- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- FY end
- Dec 31
- Entity type
- operating
- EIN
- 330702205
- Phone
- 909-980-9484
- Business address
- 11570 SIXTH STREET, RANCHO CUCAMONGA, CA, 91730
- Open-market buys, last 90 days
- $0
- in 0 filings
- Open-market sales, last 90 days
- $1,232,854
- in 4 filings, $918K under 10b5-1 plans
Net −$1,232,854. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.
Who's trading
90 days
| Date | Insider | Transaction | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-03-09 | Liawatidewi Yakob EVP CORP ADMIN CENTER | Grant or award | +35,450 | 124,795 | ||
| 2026-03-09 | Liawatidewi Yakob EVP CORP ADMIN CENTER | Grant or award · Employee Stock Option (right to buy) | +73,126 | 73,126 | ||
| 2026-03-09 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Grant or award | +39,432 | 174,994 | ||
| 2026-03-09 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Grant or award · Employee Stock Option (right to buy) | +81,341 | 81,341 | ||
| 2026-03-09 | PETERS WILLIAM J CFO, EVP & TREASURER | Grant or award | +58,693 | 180,333 | ||
| 2026-03-09 | PETERS WILLIAM J CFO, EVP & TREASURER | Grant or award · Employee Stock Option (right to buy) | +121,071 | 121,071 | ||
| 2026-03-09 | Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | Grant or award | +180,504 | 3,014,621 | ||
| 2026-03-09 | Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | Grant or award | +72,462 | 1,252,428 | ||
| 2026-03-09 | Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | Grant or award · Employee Stock Option (right to buy) | +372,338 | 372,338 | ||
| 2026-03-09 | Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | Grant or award · Employee Stock Option (right to buy) | +149,472 | 149,472 | ||
| 2026-03-06 | Liawatidewi Yakob EVP CORP ADMIN CENTER | Shares withheld for taxes | −1,144 | $19.34 | $22K | 89,345 |
| 2026-03-06 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Shares withheld for taxes | −1,357 | $19.34 | $26K | 135,562 |
| 2026-03-06 | PETERS WILLIAM J CFO, EVP & TREASURER | Shares withheld for taxes | −2,146 | $19.34 | $42K | 121,640 |
| 2026-03-06 | Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | Shares withheld for taxes | −7,773 | $19.34 | $150K | 2,834,117 |
| 2026-03-06 | Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | Shares withheld for taxes | −3,077 | $19.34 | $60K | 1,179,966 |
| 2026-03-04 | Liawatidewi Yakob EVP CORP ADMIN CENTER | Shares withheld for taxes | −965 | $19.96 | $19K | 90,489 |
| 2026-03-04 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Shares withheld for taxes | −1,124 | $19.96 | $22K | 136,919 |
| 2026-03-04 | PETERS WILLIAM J CFO, EVP & TREASURER | Shares withheld for taxes | −1,744 | $19.96 | $35K | 123,786 |
| 2026-03-04 | Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | Shares withheld for taxes | −5,769 | $19.96 | $115K | 2,841,890 |
| 2026-03-04 | Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | Shares withheld for taxes | −2,432 | $19.96 | $49K | 1,183,043 |
Page 3 of 81 · 1,602 trades