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 |
|---|---|---|---|---|---|---|
| 2025-12-17 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Option exercise | +9,787 | $11.33 | $111K | 147,830 |
| 2025-12-17 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Sale | −9,787 | $26.20 | $256K | 138,043 |
| 2025-12-17 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Option exercise · Employee Stock Option (right to buy) | −9,787 | 0 | ||
| 2025-12-12 | Petersen Floyd F. Director | Sale | −2,426 | $25.92 | $63K | 71,368 |
| 2025-12-11 | Petersen Floyd F. Director | Sale | −1,737 | $25.69 | $45K | 73,794 |
| 2025-11-25 | PRINS RICHARD K Director | Option exercise | +4,179 | $16.69 | $70K | 39,362 |
| 2025-11-25 | PRINS RICHARD K Director | Sale | −4,179 | $27.10 | $113K | 35,183 |
| 2025-11-25 | PRINS RICHARD K Director | Option exercise · Stock Option (right to buy) | −4,179 | 0 | ||
| 2025-11-13 | Petersen Floyd F. Director | Option exercise | +16,679 | $16.69 | $278K | 92,210 |
| 2025-11-13 | Petersen Floyd F. Director | Sale | −16,679 | $26.49 | $442K | 75,531 |
| 2025-11-13 | Petersen Floyd F. Director | Option exercise · Stock Option (right to buy) | −16,679 | 0 | ||
| 2025-11-03 | Petersen Floyd F. Director | Sale 10b5-1 | −500 | $25.27 | $13K | 75,531 |
| 2025-10-01 | Petersen Floyd F. Director | Sale 10b5-1 | −500 | $27.20 | $14K | 76,031 |
| 2025-09-02 | Petersen Floyd F. Director | Sale 10b5-1 | −500 | $30.98 | $15K | 76,531 |
| 2025-08-01 | Petersen Floyd F. Director | Sale 10b5-1 | −500 | $20.83 | $10K | 77,031 |
| 2025-07-18 | Gaugh David Russell Director | Grant or award | +6,304 | 6,304 | ||
| 2025-07-18 | Gaugh David Russell Director | Grant or award · Stock Option (right to buy) | +13,987 | 13,987 | ||
| 2025-07-02 | Petersen Floyd F. Director | Sale 10b5-1 | −500 | $23.47 | $12K | 77,531 |
| 2025-06-13 | Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | Option exercise | +200,000 | $13.03 | $2.6M | 2,847,659 |
| 2025-06-13 | Zhang Jack Y. CEO & CHIEF SCIENTIFIC OFFICER | Option exercise · Employee Stock Option (right to buy) | −200,000 | 205,003 |
Page 4 of 81 · 1,602 trades