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| Keyboard |
| Amphastar Pharmaceuticals Inc | |
|---|---|
| Ticker | AMPH |
| CIK # | 0001297184 |
| CUSIP | 03209R103 |
| Sector | Life Sciences - Pharmaceutical Preparations |
| Address | 11570 Sixth Street, Rancho Cucamonga, CA 91730 |
| Source | [EDGAR] |
| CIK | Filing | 2011 - 2026 |
|---|---|---|
| [0001297184] | 10-K | |
| [0001297184] | 10-Q | |
| [0001297184] | 3 | |
| [0001297184] | 4 | |
| [0001297184] | 8-K | |
| [0001297184] | SC 13G |
| Form 13D/13G Filer | Form 13D/13G Subject | Filed | % Owned |
|---|---|---|---|
| Dimensional Fund Advisors LP | Amphastar Pharmaceuticals Inc | [2026-07-14] | 0.0 |
| Federated Hermes Inc | Amphastar Pharmaceuticals Inc | [2021-02-12] | 6.79 |
| Vanguard Group Inc | Amphastar Pharmaceuticals Inc | [2020-02-11] | 5.03 |
| BlackRock Inc | Amphastar Pharmaceuticals Inc | [2017-01-09] | 11.0 |
| Zhang Jack Y | Amphastar Pharmaceuticals Inc | [2015-02-12] | 24.91 |
| Broadfin Capital LLC | Amphastar Pharmaceuticals Inc | [2014-07-03] | 5.01 |
| Flynn James E | Amphastar Pharmaceuticals Inc | [2014-06-30] | 4.22 |
| Insider Transaction (Form 3/4/5) | Date | Action | Shares | Price | Value ($) |
|---|---|---|---|---|---|
|
Liawatidewi Yakob
Common Stock
|
2026-03-15 | Tax withheld | 1,033 | $18.18 | 18,780 |
|
Luo Mary Z +1
Common Stock
|
2026-03-15 | Tax withheld | 2,908 | $18.18 | 52,867 |
|
Luo Mary Z +1
Common Stock
|
2026-03-15 | Tax withheld | 9,784 | $18.18 | 177,873 |
|
Zhou Rong
Common Stock
|
2026-03-15 | Tax withheld | 1,225 | $18.18 | 22,270 |
|
Peters William J
Common Stock
|
2026-03-15 | Tax withheld | 1,973 | $18.18 | 35,869 |
|
Luo Mary Z +1
Common Stock
|
2026-03-10 | Tax withheld | 4,395 | $18.91 | 83,109 |
|
Peters William J
Common Stock
|
2026-03-10 | Tax withheld | 3,297 | $18.91 | 62,346 |
|
Zhou Rong
Common Stock
|
2026-03-10 | Tax withheld | 2,215 | $18.91 | 41,886 |
|
Liawatidewi Yakob
Common Stock
|
2026-03-10 | Tax withheld | 1,870 | $18.91 | 35,362 |
|
Luo Mary Z +1
Common Stock
|
2026-03-10 | Tax withheld | 14,785 | $18.91 | 279,584 |
|
Liawatidewi Yakob
Common Stock
|
2026-03-09 | Grant | 35,450 | $0.00 | |
|
Luo Mary Z +1
Employee Stock Option (right to buy) · derivative
|
2026-03-09 | Grant | 372,338 | $0.00 | |
|
Peters William J
Employee Stock Option (right to buy) · derivative
|
2026-03-09 | Grant | 121,071 | $0.00 | |
|
Luo Mary Z +1
Common Stock
|
2026-03-09 | Grant | 72,462 | $0.00 | |
|
Luo Mary Z +1
Common Stock
|
2026-03-09 | Grant | 180,504 | $0.00 | |
|
Peters William J
Common Stock
|
2026-03-09 | Grant | 58,693 | $0.00 | |
|
Luo Mary Z +1
Employee Stock Option (right to buy) · derivative
|
2026-03-09 | Grant | 149,472 | $0.00 | |
|
Zhou Rong
Common Srock
|
2026-03-09 | Grant | 39,432 | $0.00 | |
|
Liawatidewi Yakob
Employee Stock Option (right to buy) · derivative
|
2026-03-09 | Grant | 73,126 | $0.00 | |
|
Zhou Rong
Employee Stock Option (right to buy) · derivative
|
2026-03-09 | Grant | 81,341 | $0.00 | |
| showing 20 of 200 most recent transactions | |||||
| 13F Ownership Over Time | Holders | Shares Held |
|---|---|---|
| 2026-03-31 | 215 | 31,912,922 |
| 2025-12-31 | 236 | 34,685,701 |
| 2025-09-30 | 243 | 32,300,145 |
| 2025-06-30 | 245 | 32,585,804 |
| 2025-03-31 | 241 | 32,225,122 |
| 2024-12-31 | 264 | 34,166,927 |
| 2024-09-30 | 279 | 34,508,867 |
| 2024-06-30 | 268 | 33,446,348 |
| 2024-03-31 | 271 | 33,939,084 |
| 2023-12-31 | 277 | 32,417,863 |
| 2023-09-30 | 255 | 30,674,854 |
| 2023-06-30 | 246 | 30,343,856 |