Amphastar Pharmaceuticals, Inc. AMPH
27.12 USD +0.09 (+0.33%)
At closeNov 3, 2026, 4:01 PM EST
27.12 0.00 0.00%
After hours · Nov 3, 4:01 PM ET
26.85 Day range 27.39
16.87 52-week range 29.40
- YTD
- +1.27%
- 1 year
- +7.19%
Held by funds
148 US ETFs and mutual funds hold AMPH · largest positions
Ownership
Held by insiders 30.81%
Held by institutions 68.61%
Float held by institutions 99.17%
Institutions 308
Top institutional holders
| Holder | % held | Shares | Value | Reported |
|---|---|---|---|---|
| Blackrock Inc. | 12.28% | 5,224,934 | 141.70M | Jun 29, 2026 |
| Dimensional Fund Advisors LP | 5.42% | 2,305,107 | 62.51M | Jun 29, 2026 |
| State Street Corporation | 3.86% | 1,642,126 | 44.53M | Jun 29, 2026 |
| Vanguard Capital Management LLC | 3.48% | 1,481,952 | 40.19M | Jun 29, 2026 |
| American Century Companies Inc | 2.77% | 1,176,626 | 31.91M | Jun 29, 2026 |
| Marshall Wace LLP | 2.51% | 1,066,322 | 28.92M | Jun 29, 2026 |
Top mutual fund holders
| Holder | % held | Shares | Value | Reported |
|---|---|---|---|---|
| iShares Trust-iShares Core S&P Small-Cap ETF | 4.40% | 1,873,133 | 50.80M | Sep 29, 2026 |
| American Century ETF Trust-Avantis U.S. Small Cap Value ETF | 3.06% | 1,303,435 | 35.35M | Sep 29, 2026 |
| VANGUARD INDEX FUNDS-Vanguard Total Stock Market Index Fund | 2.48% | 1,055,676 | 28.63M | Jun 29, 2026 |
| Capitol Series Trust-FullerThaler Behavioral Small-Cap Equity Fund | 2.12% | 902,737 | 24.48M | Jun 29, 2026 |
| iShares Trust-iShares Russell 2000 ETF | 1.97% | 839,366 | 22.76M | Sep 29, 2026 |
| DFA INVESTMENT DIMENSIONS GROUP INC-U.S. Small Cap Value Portfolio | 1.40% | 596,077 | 16.17M | Jul 30, 2026 |
Insiders
| Insider | Relation | Latest transaction | Date | Shares held |
|---|---|---|---|---|
| DEFLIN GAYLE | Director | Stock Award(Grant) | May 31, 2026 | 19,057 |
| GERST DIANE G. | Director | Stock Award(Grant) | May 31, 2026 | 31,899 |
| LEE HOWARD S | Director | Stock Award(Grant) | May 31, 2026 | 159,350 |
| LIAWATIDEWI YAKOB | Officer and Director | Stock Award(Grant) | Mar 8, 2026 | 125,384 |
| PETERS WILLIAM J | Chief Financial Officer | Sale | Sep 20, 2026 | 168,707 |
| PETERSEN FLOYD F | Director | Sale | Dec 11, 2025 | 71,368 |