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 |
|---|---|---|---|---|---|---|
| 2025-03-10 | Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | Grant or award | +48,996 | 1,148,257 | ||
| 2025-03-10 | Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | Grant or award · Employee Stock Option (right to buy) | +246,821 | 246,821 | ||
| 2025-03-10 | Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | Grant or award · Employee Stock Option (right to buy) | +104,052 | 104,052 | ||
| 2025-03-06 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Shares withheld for taxes | −1,354 | $28.32 | $38K | 115,994 |
| 2025-03-06 | PETERS WILLIAM J CFO, EVP & TREASURER | Shares withheld for taxes | −2,141 | $28.32 | $61K | 93,483 |
| 2025-03-06 | Liawatidewi Yakob EVP CORP ADMIN CENTER | Shares withheld for taxes | −1,141 | $28.32 | $32K | 72,834 |
| 2025-03-06 | Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | Shares withheld for taxes | −9,645 | $28.32 | $273K | 2,493,156 |
| 2025-03-06 | Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | Shares withheld for taxes | −3,069 | $28.32 | $87K | 1,099,261 |
| 2025-03-06 | Petersen Floyd F. Director | Sale 10b5-1 | −1,000 | $27.99 | $28K | 74,409 |
| 2025-03-04 | PETERS WILLIAM J CFO, EVP & TREASURER | Option exercise 10b5-1 | +7,490 | $13.35 | $100K | 101,594 |
| 2025-03-04 | PETERS WILLIAM J CFO, EVP & TREASURER | Sale 10b5-1 | −4,231 | $27.54 | $117K | 97,363 |
| 2025-03-04 | PETERS WILLIAM J CFO, EVP & TREASURER | Shares withheld for taxes 10b5-1 | −1,739 | $27.62 | $48K | 95,624 |
| 2025-03-04 | PETERS WILLIAM J CFO, EVP & TREASURER | Option exercise · Employee Stock Option (right to buy) 10b5-1 | −7,490 | 0 | ||
| 2025-03-04 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Shares withheld for taxes | −1,121 | $27.62 | $31K | 117,348 |
| 2025-03-04 | Liawatidewi Yakob EVP CORP ADMIN CENTER | Shares withheld for taxes | −963 | $27.62 | $27K | 73,975 |
| 2025-03-04 | Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | Shares withheld for taxes | −5,753 | $27.62 | $159K | 2,502,801 |
| 2025-03-04 | Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | Shares withheld for taxes | −2,426 | $27.62 | $67K | 1,102,330 |
| 2024-12-13 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Option exercise | +8,000 | $11.33 | $91K | 126,469 |
| 2024-12-13 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Sale | −8,000 | $45.23 | $362K | 118,469 |
| 2024-12-13 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Option exercise · Employee Stock Option (right to buy) | −8,000 | 9,787 |
Page 7 of 81 · 1,602 trades