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 |
|---|---|---|---|---|---|---|
| 2026-09-16 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Option exercise | +10,000 | $13.35 | $134K | 179,203 |
| 2026-09-16 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Sale | −10,000 | $23.94 | $239K | 169,203 |
| 2026-09-16 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Option exercise · Employee Stock Option (right to buy) | −10,000 | 19,424 | ||
| 2026-09-02 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Sale | −3,187 | $23.63 | $75K | 169,203 |
| 2026-03-15 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Shares withheld for taxes | −1,225 | $18.18 | $22K | 171,554 |
| 2026-03-10 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Shares withheld for taxes | −2,215 | $18.91 | $42K | 172,779 |
| 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 | ||
| 2026-03-06 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Shares withheld for taxes | −1,357 | $19.34 | $26K | 135,562 |
| 2026-03-04 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Shares withheld for taxes | −1,124 | $19.96 | $22K | 136,919 |
| 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 | ||
| 2025-03-17 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Shares withheld for taxes | −1,967 | $27.69 | $54K | 137,497 |
| 2025-03-15 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Shares withheld for taxes | −1,222 | $26.66 | $33K | 139,464 |
| 2025-03-10 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Grant or award | +24,692 | 140,686 | ||
| 2025-03-10 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Grant or award · Employee Stock Option (right to buy) | +52,437 | 52,437 | ||
| 2025-03-06 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Shares withheld for taxes | −1,354 | $28.32 | $38K | 115,994 |
| 2025-03-04 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Shares withheld for taxes | −1,121 | $27.62 | $31K | 117,348 |
| 2024-12-13 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Option exercise | +8,000 | $11.33 | $91K | 126,469 |
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