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 |
|---|---|---|---|---|---|---|
| 2025-06-03 | Lee Howard Director | Shares withheld for taxes | −923 | $26.01 | $24K | 151,976 |
| 2025-06-02 | Lee Howard Director | Grant or award | +5,122 | 152,899 | ||
| 2025-06-02 | Lee Howard Director | Grant or award · Stock Option (right to buy) | +11,402 | 11,402 | ||
| 2025-06-02 | Deflin Gayle Director | Grant or award | +5,122 | 10,914 | ||
| 2025-06-02 | Deflin Gayle Director | Grant or award · Stock Option (right to buy) | +11,402 | 11,402 | ||
| 2025-06-02 | Gerst Diane G. Director | Grant or award | +5,122 | 23,756 | ||
| 2025-06-02 | Gerst Diane G. Director | Grant or award · Stock Option (right to buy) | +11,402 | 11,402 | ||
| 2025-06-02 | PRINS RICHARD K Director | Grant or award | +5,122 | 35,183 | ||
| 2025-06-02 | PRINS RICHARD K Director | Grant or award · Stock Option (right to buy) | +11,402 | 11,402 | ||
| 2025-06-02 | Petersen Floyd F. Director | Sale 10b5-1 | −500 | $25.67 | $13K | 72,909 |
| 2025-06-02 | Petersen Floyd F. Director | Grant or award 10b5-1 | +5,122 | 78,031 | ||
| 2025-06-02 | Petersen Floyd F. Director | Grant or award · Stock Option (right to buy) 10b5-1 | +11,402 | 11,402 | ||
| 2025-06-02 | ZASLOFF MICHAEL A Director | Grant or award | +5,122 | 29,524 | ||
| 2025-06-02 | ZASLOFF MICHAEL A Director | Grant or award · Stock Option (right to buy) | +11,402 | 11,402 | ||
| 2025-05-19 | PETERS WILLIAM J CFO, EVP & TREASURER | Shares withheld for taxes | −273 | $24.79 | $7K | 124,985 |
| 2025-05-01 | Petersen Floyd F. Director | Sale 10b5-1 | −500 | $24.08 | $12K | 73,409 |
| 2025-04-01 | Petersen Floyd F. Director | Sale 10b5-1 | −500 | $28.38 | $14K | 73,909 |
| 2025-03-17 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Shares withheld for taxes | −1,967 | $27.69 | $54K | 137,497 |
| 2025-03-17 | Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | Shares withheld for taxes | −16,150 | $27.69 | $447K | 2,647,659 |
| 2025-03-17 | Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | Shares withheld for taxes | −7,223 | $27.69 | $200K | 1,185,475 |
Page 5 of 81 · 1,602 trades