NASDAQ: AMPHAmphastar Pharmaceuticals Inc Stock Ownership - Who owns Amphastar Pharmaceuticals?
Insider buying vs selling
Have Amphastar Pharmaceuticals Inc insiders been buying or selling?
Buy
Sell
| Name | Role | Date | Shares | Price | Value |
|---|---|---|---|---|---|
| Floyd F. Petersen | Director | 2025-12-12 | 2,426 | $25.92 | $62.89kSell |
| Floyd F. Petersen | Director | 2025-12-11 | 1,737 | $25.69 | $44.62kSell |
| Richard K. Prins | Director | 2025-11-25 | 4,179 | $27.10 | $113.26kSell |
| Richard K. Prins | Director | 2025-11-25 | 4,179 | $16.69 | $69.75kBuy |
| Floyd F. Petersen | Director | 2025-11-13 | 16,679 | $26.49 | $441.84kSell |
| Floyd F. Petersen | Director | 2025-11-13 | 16,679 | $16.69 | $278.37kBuy |
| Floyd F. Petersen | Director | 2025-11-03 | 500 | $25.27 | $12.63kSell |
| Floyd F. Petersen | Director | 2025-10-01 | 500 | $27.21 | $13.60kSell |
| Floyd F. Petersen | Director | 2025-09-02 | 500 | $30.98 | $15.49kSell |
| Floyd F. Petersen | Director | 2025-08-01 | 500 | $20.83 | $10.42kSell |
AMPH insiders have bought more... subscribe to Premium to read more.
Net Insider Buy/Sell (L12M) Ownership
Be the first to know when AMPH insiders and whales buy or sell their stock.
AMPH Shareholders
What type of owners hold Amphastar Pharmaceuticals Inc stock?
Institutional
Insider
Retail
| Name | Hold | Shares | Value | Type |
|---|---|---|---|---|
| Jack Y. Zhang | 38.11% | 17,511,932 | $448.48M | Insider |
| Mary Z. Luo | 19.46% | 8,941,010 | $228.98M | Insider |
| Applied Physics Chemistry Laboratories Inc | 15.95% | 7,327,679 | $187.66M | Insider |
| Blackrock Inc | 11.94% | 5,485,057 | $140.47M | Institution |
| Vanguard Group Inc | 5.73% | 2,631,040 | $67.38M | Institution |
| Td Asset Management Inc | 4.20% | 1,931,892 | $49.48M | Institution |
| Dimensional Fund Advisors LP | 3.82% | 1,755,665 | $44.96M | Institution |
| State Street Corp | 3.27% | 1,500,742 | $38.43M | Institution |
| Fuller Thaler Asset Management Inc | 2.95% | 1,353,927 | $34.67M | Institution |
| Boston Trust Walden Corp | 2.55% | 1,173,107 | $30.04M | Institution |
AMPH vs Pharmaceutical Stocks
Amphastar Pharmaceuticals Stock Ownership FAQ
Company
AboutNewsBlogStock Investing FAQPlansPrivacy PolicyTerms of ServiceCancellation & RefundsPerformanceHelp GuidesContactTwitterYouTubeNewsletterWallStreetZen does not provide financial advice and does not issue recommendations or offers to buy stock or sell any security.
Information is provided 'as-is' and solely for informational purposes and is not advice. WallStreetZen does not bear any responsibility for any losses or damage that may occur as a result of reliance on this data.
Information is provided 'as-is' and solely for informational purposes and is not advice. WallStreetZen does not bear any responsibility for any losses or damage that may occur as a result of reliance on this data.