AMPHASTAR PHARMACEUTICALS IN (AMPH) Stock Ownership
NASDAQ:AMPH • US03209R1032
Current stock price
19.53 USD
+0.12 (+0.62%)
Last:
AMPH Ownership information
| Shares Outstanding | 45.37M |
| Float | 34.12M |
| Float Short Interest Percentage | 10.72% |
| Owners (insider) | 9.5% |
| Owners (institutional) | 76.52% |
| Owners (insider) change | 4.03% |
| Owners (institutional) change | -0.32% |
| Date | Name | Type | Shares | Price | Amount |
|---|---|---|---|---|---|
| Mar 10, 2026 | Zhang Jack Y. | Option Excercise | 19180 | 18.91 | $ 362,693.80 |
| Mar 10, 2026 | Luo Mary Z. | Option Excercise | 19180 | 18.91 | $ 362,693.80 |
| Mar 10, 2026 | Liawatidewi Yakob | Option Excercise | 1870 | 18.91 | $ 35,361.70 |
| Mar 10, 2026 | Zhou Rong | Option Excercise | 2215 | 18.91 | $ 41,885.65 |
| Mar 10, 2026 | PETERS WILLIAM J | Option Excercise | 3297 | 18.91 | $ 62,346.27 |
| Mar 9, 2026 | Liawatidewi Yakob | Grant | 35450 | 0.00 | $ 0.00 |
| Mar 9, 2026 | Zhou Rong | Grant | 39432 | 0.00 | $ 0.00 |
| Mar 9, 2026 | PETERS WILLIAM J | Grant | 58693 | 0.00 | $ 0.00 |
| Mar 9, 2026 | Zhang Jack Y. | Grant | 252966 | 0.00 | $ 0.00 |
| Mar 9, 2026 | Luo Mary Z. | Grant | 252966 | 0.00 | $ 0.00 |
| Mar 6, 2026 | Liawatidewi Yakob | Option Excercise | 1144 | 19.34 | $ 22,124.96 |
| Mar 6, 2026 | Zhou Rong | Option Excercise | 1357 | 19.34 | $ 26,244.38 |
| Mar 6, 2026 | Zhang Jack Y. | Option Excercise | 10850 | 19.34 | $ 209,839.00 |
| Mar 6, 2026 | Luo Mary Z. | Option Excercise | 10850 | 19.34 | $ 209,839.00 |
| Mar 6, 2026 | PETERS WILLIAM J | Option Excercise | 2146 | 19.34 | $ 41,503.64 |
| Mar 4, 2026 | Zhou Rong | Option Excercise | 1124 | 19.96 | $ 22,435.04 |
| Mar 4, 2026 | Liawatidewi Yakob | Option Excercise | 965 | 19.96 | $ 19,261.40 |
| Mar 4, 2026 | PETERS WILLIAM J | Option Excercise | 1744 | 19.96 | $ 34,810.24 |
| Mar 4, 2026 | Zhang Jack Y. | Option Excercise | 8201 | 19.96 | $ 163,691.96 |
| Mar 4, 2026 | Luo Mary Z. | Option Excercise | 8201 | 19.96 | $ 163,691.96 |
| Dec 17, 2025 | Zhou Rong | Option Excercise | 9787 | 11.33 | $ 110,886.71 |
| Dec 17, 2025 | Zhou Rong | Open Market Sale | 9787 | 26.20 | $ 256,379.27 |
| Dec 11, 2025 | Petersen Floyd F. | Open Market Sale | 4163 | 25.82 | $ 107,508.28 |
| Nov 25, 2025 | PRINS RICHARD K | Option Excercise | 4179 | 16.69 | $ 69,747.51 |
| Nov 25, 2025 | PRINS RICHARD K | Open Market Sale | 4179 | 27.10 | $ 113,253.41 |
| Nov 13, 2025 | Petersen Floyd F. | Option Excercise | 16679 | 16.69 | $ 278,372.51 |
| Nov 13, 2025 | Petersen Floyd F. | Open Market Sale | 16679 | 26.49 | $ 441,836.72 |
| Nov 3, 2025 | Petersen Floyd F. | Open Market Sale | 500 | 25.27 | $ 12,633.10 |
| Oct 1, 2025 | Petersen Floyd F. | Open Market Sale | 500 | 27.20 | $ 13,602.40 |
| Sep 2, 2025 | Petersen Floyd F. | Open Market Sale | 500 | 30.98 | $ 15,491.65 |
| Aug 1, 2025 | Petersen Floyd F. | Open Market Sale | 500 | 20.83 | $ 10,415.75 |
| Jul 18, 2025 | Gaugh David Russell | Grant | 6304 | 0.00 | $ 0.00 |
| Jul 2, 2025 | Petersen Floyd F. | Open Market Sale | 500 | 23.47 | $ 11,733.95 |
| Jun 13, 2025 | Zhang Jack Y. | Option Excercise | 200000 | 13.03 | $ 2,606,000.00 |
| Jun 13, 2025 | Luo Mary Z. | Option Excercise | 200000 | 13.03 | $ 2,606,000.00 |
| Jun 3, 2025 | Lee Howard | Option Excercise | 923 | 26.01 | $ 24,007.23 |
| Jun 2, 2025 | Gerst Diane G. | Grant | 5122 | 0.00 | $ 0.00 |
| Jun 2, 2025 | Deflin Gayle | Grant | 5122 | 0.00 | $ 0.00 |
| Jun 2, 2025 | Lee Howard | Grant | 5122 | 0.00 | $ 0.00 |
| May 19, 2025 | PETERS WILLIAM J | Option Excercise | 273 | 24.79 | $ 6,767.67 |
| May 1, 2025 | Petersen Floyd F. | Open Market Sale | 500 | 24.08 | $ 12,041.45 |