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 |
|---|---|---|---|---|---|---|
| 2026-11-05 | PETERS WILLIAM J CFO, EVP & TREASURER | Sale 10b5-1 | −12,631 | $28.99 | $366K | 167,076 |
| 2026-11-04 | PETERS WILLIAM J CFO, EVP & TREASURER | Sale 10b5-1 | −16,000 | $28.03 | $448K | 168,707 |
| 2026-09-21 | PETERS WILLIAM J CFO, EVP & TREASURER | Sale 10b5-1 | −4,139 | $25.00 | $103K | 168,707 |
| 2026-09-16 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Sale | −10,000 | $23.94 | $239K | 169,203 |
| 2026-09-02 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Sale | −3,187 | $23.63 | $75K | 169,203 |
| 2026-08-11 | PRINS RICHARD K Director | Sale | −7,973 | $20.30 | $162K | 29,625 |
| 2026-08-07 | PETERS WILLIAM J CFO, EVP & TREASURER | Sale 10b5-1 | −8,180 | $22.48 | $184K | 172,846 |
| 2025-12-17 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Sale | −9,787 | $26.20 | $256K | 138,043 |
| 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 | Sale | −4,179 | $27.10 | $113K | 35,183 |
| 2025-11-13 | Petersen Floyd F. Director | Sale | −16,679 | $26.49 | $442K | 75,531 |
| 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 |
| 2025-07-02 | Petersen Floyd F. Director | Sale 10b5-1 | −500 | $23.47 | $12K | 77,531 |
| 2025-06-02 | Petersen Floyd F. Director | Sale 10b5-1 | −500 | $25.67 | $13K | 72,909 |
| 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 |
Page 1 of 24 · 479 trades