Amphastar Pharmaceuticals, Inc.
AMPH- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001297184
In the last 90 days, Amphastar Pharmaceuticals, Inc. insiders filed 0 open-market purchases and 5 sales; 212 institutions reported holding it in 13F filings for Q2 2026, worth $572.1M in total; no superinvestor holds it.
13F holders, Q4 2024
Institutional positions in Amphastar Pharmaceuticals, Inc. as of Dec 31, 2024. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 264
- −13 vs. Q3 2024
- Shares held
- 35.2M
- −142.7K (−0.4%) vs. Q3 2024
- Total value
- $1.31B
- −$405.9M (−23.7%) vs. Q3 2024
- New holders
- 37
- 84 more added
- Sold out
- 50
- 100 more reduced
2 institutions that held it in Q3 2024 haven't filed for Q4 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2024: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting AMPH on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 212 | $572.1M |
| Q1 2026 | 215 | $634.0M |
| Q4 2025 | 236 | $899.7M |
| Q3 2025 | 243 | $872.8M |
| Q2 2025 | 245 | $752.0M |
| Q1 2025 | 241 | $963.6M |
| Q4 2024 | 264 | $1.31B |
| Q3 2024 | 279 | $1.72B |
| Q2 2024 | 269 | $1.37B |
| Q1 2024 | 271 | $1.47B |
| Q4 2023 | 276 | $2.06B |
| Q3 2023 | 256 | $1.47B |
| Q2 2023 | 246 | $1.80B |
| Q1 2023 | 218 | $1.13B |
| Q4 2022 | 213 | $816.7M |
| Q3 2022 | 207 | $839.3M |
| Q2 2022 | 223 | $1.06B |
| Q1 2022 | 203 | $1.07B |
| Q4 2021 | 168 | $678.8M |
| Q3 2021 | 140 | $530.8M |
| Q2 2021 | 146 | $549.6M |
| Q1 2021 | 135 | $476.9M |
Institutions, Q4 2024
Shares, value and share of portfolio for each institution holding Amphastar Pharmaceuticals, Inc.; share changes are against Q3 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 6,117,822 | $227.2M | 0.00% | +85,100+1.4% | Added |
| Vanguard Group Inc | 2,714,628 | $100.8M | 0.00% | +3,155+0.1% | Added |
| TD Asset Management Inc | 1,840,286 | $68.3M | 0.06% | −294,752−13.8% | Reduced |
| State Street Corp | 1,596,110 | $59.3M | 0.00% | +65,646+4.3% | Added |
| Neuberger Berman Group LLC | 1,374,125 | $51.0M | 0.04% | −240,963−14.9% | Reduced |
| Pacer Advisors, Inc. | 1,350,368 | $50.1M | 0.11% | +1,347,775+51,977.4% | Added |
| Dimensional Fund Advisors LP | 1,198,590 | $44.5M | 0.01% | +105,288+9.6% | Added |
| Fuller & Thaler Asset Management, Inc. | 1,132,926 | $42.1M | 0.16% | −127,841−10.1% | Reduced |
| Epoch Investment Partners, Inc. | 1,101,273 | $40.9M | 0.20% | −89,837−7.5% | Reduced |
| Boston Trust Walden Corp | 978,920 | $36.3M | 0.26% | +439,281+81.4% | Added |
| Geode Capital Management, LLC | 916,081 | $34.0M | 0.00% | −4,282−0.5% | Reduced |
| Federated Hermes, Inc. | 823,487 | $30.6M | 0.07% | −1,123,613−57.7% | Reduced |
| Morgan Stanley | 632,074 | $23.5M | 0.00% | −45,552−6.7% | Reduced |
| Northern Trust Corp | 613,170 | $22.8M | 0.00% | +29,808+5.1% | Added |
| Marshall Wace, LLP | 608,706 | $22.6M | 0.03% | +40,212+7.1% | Added |
| Price T Rowe Associates Inc | 566,656 | $21.0M | 0.00% | −2,238−0.4% | Reduced |
| Renaissance Technologies LLC | 525,500 | $19.5M | 0.03% | +36,100+7.4% | Added |
| Bessemer Group Inc | 488,630 | $18.1M | 0.03% | +11,609+2.4% | Added |
| American Century Companies Inc | 472,017 | $17.5M | 0.01% | −167,575−26.2% | Reduced |
| Goldman Sachs Group Inc | 427,835 | $15.9M | 0.00% | −21,554−4.8% | Reduced |
| Boston Partners | 426,636 | $15.8M | 0.02% | +426,636 | New |
| Granite Investment Partners, LLC | 396,702 | $14.7M | 0.64% | −9,016−2.2% | Reduced |
| Mesirow Institutional Investment Management, Inc. | 380,389 | $14.1M | 1.09% | −33,560−8.1% | Reduced |
| Charles Schwab Investment Management Inc | 347,512 | $12.9M | 0.00% | −2,544−0.7% | Reduced |
| Invesco Ltd. | 298,864 | $11.1M | 0.00% | −34,061−10.2% | Reduced |
| Bank of New York Mellon Corp | 285,863 | $10.6M | 0.00% | +32,112+12.7% | Added |
| Nordea Investment Management AB | 279,714 | $10.4M | 0.01% | +12,851+4.8% | Added |
| Millennium Management LLC | 256,556 | $9.53M | 0.01% | −3,094−1.2% | Reduced |
| Systematic Financial Management LP | 246,348 | $9.15M | 0.23% | +246,348 | New |
| Hotchkis & Wiley Capital Management LLC | 237,520 | $8.82M | 0.03% | +14,900+6.7% | Added |
| Principal Financial Group Inc | 207,978 | $7.72M | 0.00% | +5,961+3.0% | Added |
| Janus Henderson Group PLC | 189,347 | $7.03M | 0.00% | +42,302+28.8% | Added |
| Oberweis Asset Management Inc | 184,595 | $6.85M | 0.32% | +23,440+14.5% | Added |
| Silvercrest Asset Management Group LLC | 166,814 | $6.19M | 0.04% | −1,658−1.0% | Reduced |
| Assenagon Asset Management S.A. | 161,399 | $5.99M | 0.01% | −5,956−3.6% | Reduced |
| UBS Group AG | 153,742 | $5.71M | 0.00% | +52,710+52.2% | Added |
| JPMorgan Chase & Co | 153,571 | $5.70M | 0.00% | +79,651+107.8% | Added |
| Clark Capital Management Group, Inc. | 148,075 | $5.50M | 0.04% | −5,672−3.7% | Reduced |
| Ameriprise Financial Inc | 146,015 | $5.42M | 0.00% | +1,417+1.0% | Added |
| Voloridge Investment Management, LLC | 143,436 | $5.33M | 0.02% | +19,991+16.2% | Added |
| Citadel Advisors LLC | 140,413 | $5.21M | 0.00% | +5,176+3.8% | Added |
| Portolan Capital Management, LLC | 131,123 | $4.87M | 0.33% | −196,641−60.0% | Reduced |
| Lam Group, Inc. | 130,800 | $4.86M | 3.46% | 00.0% | Unchanged |
| Frontier Capital Management Co LLC | 123,360 | $4.58M | 0.04% | −259−0.2% | Reduced |
| D. E. Shaw & Co., Inc. | 118,851 | $4.41M | 0.00% | +95,192+402.4% | Added |
| Qube Research & Technologies Ltd | 115,292 | $4.28M | 0.01% | −1,386−1.2% | Reduced |
| Bank of America Corp | 112,094 | $4.16M | 0.00% | −46,037−29.1% | Reduced |
| Trexquant Investment LP | 105,528 | $3.92M | 0.05% | +16,248+18.2% | Added |
| Legal & General Group Plc | 103,741 | $3.85M | 0.00% | −582−0.6% | Reduced |
| Renaissance Group LLC | 99,572 | $3.70M | 0.15% | +29,696+42.5% | Added |
| Jane Street Group, LLC | 99,487 | $3.69M | 0.01% | +35,873+56.4% | Added |
| Two Sigma Investments, LP | 98,184 | $3.65M | 0.01% | −614−0.6% | Reduced |
| Nuveen Asset Management, LLC | 95,665 | $3.55M | 0.00% | −112,307−54.0% | Reduced |
| Public Sector Pension Investment Board | 93,430 | $3.47M | 0.01% | +12,843+15.9% | Added |
| Raymond James Financial Inc | 92,904 | $3.45M | 0.00% | +92,904 | New |
| Mutual of America Capital Management LLC | 92,251 | $3.43M | 0.04% | −106−0.1% | Reduced |
| PDT Partners, LLC | 90,484 | $3.36M | 0.30% | +9,300+11.5% | Added |
| Rhumbline Advisers | 87,327 | $3.24M | 0.00% | +1,213+1.4% | Added |
| Two Sigma Advisers, LP | 85,900 | $3.19M | 0.01% | −12,400−12.6% | Reduced |
| Barclays PLC | 84,790 | $3.15M | 0.00% | +10,334+13.9% | Added |
| UBS Asset Management Americas Inc | 83,231 | $3.09M | 0.00% | +6,786+8.9% | Added |
| First Trust Advisors LP | 81,129 | $3.01M | 0.00% | +63,100+350.0% | Added |
| Swiss National Bank | 76,400 | $2.84M | 0.00% | 00.0% | Unchanged |
| New York State Common Retirement Fund | 70,490 | $2.62M | 0.00% | 00.0% | Unchanged |
| Bridge City Capital, LLC | 70,095 | $2.60M | 0.69% | −984−1.4% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 67,367 | $2.50M | 0.01% | −16,306−19.5% | Reduced |
| Victory Capital Management Inc | 63,387 | $2.35M | 0.00% | −155,144−71.0% | Reduced |
| Citigroup Inc | 63,171 | $2.35M | 0.00% | +5,359+9.3% | Added |
| Aurora Investment Counsel | 54,705 | $2.03M | 1.11% | +70.0% | Added |
| Alliancebernstein L.P. | 50,630 | $1.88M | 0.00% | +889+1.8% | Added |
| Campbell & CO Investment Adviser LLC | 47,566 | $1.77M | 0.14% | +47,566 | New |
| Twinbeech Capital LP | 46,797 | $1.74M | 0.03% | +46,797 | New |
| Prudential Financial Inc | 38,694 | $1.73M | 0.00% | −630−1.6% | Reduced |
| Aristeia Capital LLC | 43,235 | $1.61M | 0.06% | +43,235 | New |
| Schonfeld Strategic Advisors LLC | 42,614 | $1.58M | 0.01% | +33,007+343.6% | Added |
| Intech Investment Management LLC | 42,156 | $1.57M | 0.02% | +29,167+224.6% | Added |
| Assetmark, Inc | 41,921 | $1.56M | 0.00% | −1,985−4.5% | Reduced |
| Martingale Asset Management L P | 40,205 | $1.49M | 0.04% | −60−0.1% | Reduced |
| BNP Paribas Arbitrage, SA | 36,964 | $1.37M | 0.00% | −57,502−60.9% | Reduced |
| LSV Asset Management | 36,400 | $1.35M | 0.00% | −44,000−54.7% | Reduced |
| California State Teachers Retirement System | 36,369 | $1.35M | 0.00% | −595−1.6% | Reduced |
| Great West Life Assurance Co | 35,045 | $1.30M | 0.00% | −1,902−5.1% | Reduced |
| Deutsche Bank AG | 34,082 | $1.27M | 0.00% | +10,839+46.6% | Added |
| Envestnet Asset Management Inc | 32,203 | $1.20M | 0.00% | −2,463−7.1% | Reduced |
| Susquehanna International Group, LLP | 31,266 | $1.16M | 0.00% | +16,483+111.5% | Added |
| AQR Capital Management LLC | 29,471 | $1.09M | 0.00% | −12,196−29.3% | Reduced |
| Engineers Gate Manager LP | 29,108 | $1.08M | 0.02% | +2,658+10.0% | Added |
| Thrivent Financial for Lutherans | 28,988 | $1.08M | 0.00% | −827−2.8% | Reduced |
| Royal Bank of Canada | 28,632 | $1.06M | 0.00% | +2,118+8.0% | Added |
| Gotham Asset Management, LLC | 28,448 | $1.06M | 0.01% | −7,290−20.4% | Reduced |
| SEI Investments Co | 28,125 | $1.04M | 0.00% | −13,103−31.8% | Reduced |
| Arkadios Wealth Advisors | 27,964 | $1.04M | 0.06% | +1,379+5.2% | Added |
| Franklin Resources Inc | 27,405 | $1.02M | 0.00% | −1,060−3.7% | Reduced |
| Chatham Capital Group, Inc. | 27,295 | $1.01M | 0.17% | −395−1.4% | Reduced |
| State of Wisconsin Investment Board | 25,649 | $952.3K | 0.00% | −33,582−56.7% | Reduced |
| Quantbot Technologies LP | 25,454 | $945.1K | 0.03% | +25,454 | New |
| Advisor OS, LLC | 25,405 | $943.3K | 0.11% | −628−2.4% | Reduced |
| Glenmede Trust Co NA | 24,743 | $918.7K | 0.00% | −13,141−34.7% | Reduced |
| Polaris Capital Management, LLC | 24,500 | $909.7K | 0.04% | +24,500 | New |
| New York State Teachers Retirement System | 23,866 | $886.0K | 0.00% | 00.0% | Unchanged |