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, Q2 2025
Institutional positions in Amphastar Pharmaceuticals, Inc. as of Jun 30, 2025. 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
- 245
- +5 vs. Q1 2025
- Shares held
- 32.7M
- −518.9K (−1.6%) vs. Q1 2025
- Total value
- $752.0M
- −$211.6M (−22.0%) vs. Q1 2025
- New holders
- 45
- 91 more added
- Sold out
- 40
- 73 more reduced
1 institution that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2025: 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, Q2 2025
Shares, value and share of portfolio for each institution holding Amphastar Pharmaceuticals, Inc.; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| State Board of Administration of Florida Retirement System | 10,913 | $250.6K | 0.00% | 00.0% | Unchanged |
| Maryland State Retirement & Pension System | 10,936 | $251.1K | 0.01% | 00.0% | Unchanged |
| Yousif Capital Management, LLC | 11,078 | $254.4K | 0.00% | −37−0.3% | Reduced |
| Arizona State Retirement System | 11,090 | $254.6K | 0.00% | +78+0.7% | Added |
| Segall Bryant & Hamill, LLC | 11,185 | $256.8K | 0.00% | 00.0% | Unchanged |
| Federated Hermes, Inc. | 11,224 | $257.7K | 0.00% | −573,891−98.1% | Reduced |
| Quantinno Capital Management LP | 11,269 | $258.7K | 0.00% | +11,269 | New |
| Cim, LLC | 11,429 | $262.4K | 0.04% | +1,541+15.6% | Added |
| Comerica Bank | 11,553 | $265.3K | 0.00% | −10−0.1% | Reduced |
| Teachers Retirement System of the State of Kentucky | 11,691 | $268.0K | 0.00% | 00.0% | Unchanged |
| Bank of Montreal | 11,790 | $270.7K | 0.00% | +3,584+43.7% | Added |
| Hohimer Wealth Management, LLC | 11,845 | $272.0K | 0.05% | +3,840+48.0% | Added |
| JustInvest LLC | 12,624 | $289.8K | 0.00% | +4,855+62.5% | Added |
| SEI Investments Co | 12,672 | $291.0K | 0.00% | +3,081+32.1% | Added |
| Tudor Investment Corp Et Al | 12,916 | $296.6K | 0.00% | −8,877−40.7% | Reduced |
| Magnetar Financial LLC | 13,337 | $306.2K | 0.00% | +13,337 | New |
| Gotham Asset Management, LLC | 14,014 | $321.8K | 0.00% | +3,144+28.9% | Added |
| Handelsbanken Fonder AB | 14,400 | $331.0K | 0.00% | 00.0% | Unchanged |
| PDT Partners, LLC | 14,630 | $335.9K | 0.02% | +14,630 | New |
| Advisory Research Inc | 14,898 | $342.1K | 0.05% | +1,009+7.3% | Added |
| Advisor Group Holdings, Inc. | 15,236 | $357.0K | 0.00% | −906−5.6% | Reduced |
| Wellington Management Group LLP | 15,618 | $358.6K | 0.00% | −1,295−7.7% | Reduced |
| Occudo Quantitative Strategies LP | 15,774 | $362.2K | 0.04% | +15,774 | New |
| Significant Wealth Partners LLC | 16,178 | $371.4K | 0.18% | +5,963+58.4% | Added |
| Assenagon Asset Management S.A. | 16,610 | $381.4K | 0.00% | +1,394+9.2% | Added |
| Janus Henderson Group PLC | 16,868 | $387.4K | 0.00% | −107,534−86.4% | Reduced |
| Louisiana State Employees Retirement System | 17,200 | $394.9K | 0.01% | −500−2.8% | Reduced |
| Vident Advisory, LLC | 17,279 | $396.7K | 0.00% | +17,279 | New |
| Y-Intercept (Hong Kong) Ltd | 17,727 | $407.0K | 0.01% | +17,727 | New |
| Cynosure Management, LLC | 17,820 | $409.1K | 0.05% | +5,419+43.7% | Added |
| Voya Investment Management LLC | 18,099 | $415.6K | 0.00% | −43−0.2% | Reduced |
| Manufacturers Life Insurance Company, The | 18,688 | $429.1K | 0.00% | −1,138−5.7% | Reduced |
| Illinois Municipal Retirement Fund | 19,937 | $457.8K | 0.01% | −418−2.1% | Reduced |
| Graham Capital Management, L.P. | 20,288 | $465.8K | 0.01% | −6,136−23.2% | Reduced |
| Man Group plc | 20,300 | $466.1K | 0.00% | −17,937−46.9% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 20,338 | $467.0K | 0.00% | −2,151−9.6% | Reduced |
| DekaBank Deutsche Girozentrale | 20,848 | $475.0K | 0.00% | 00.0% | Unchanged |
| Aquatic Capital Management LLC | 21,195 | $486.6K | 0.01% | +21,195 | New |
| Fox Run Management, L.L.C. | 21,199 | $486.7K | 0.08% | +21,199 | New |
| State of Alaska, Department of Revenue | 21,892 | $502.0K | 0.01% | +1,111+5.3% | Added |
| Campbell & CO Investment Adviser LLC | 22,433 | $515.1K | 0.03% | −23,356−51.0% | Reduced |
| Squarepoint Ops LLC | 23,026 | $528.7K | 0.00% | −46,744−67.0% | Reduced |
| MetLife Investment Management | 23,093 | $530.2K | 0.00% | 00.0% | Unchanged |
| New York State Teachers Retirement System | 23,732 | $545.0K | 0.00% | −134−0.6% | Reduced |
| Centiva Capital, LP | 24,161 | $554.7K | 0.04% | +24,161 | New |
| Wells Fargo & Company | 24,396 | $560.1K | 0.00% | −4,965−16.9% | Reduced |
| SG Americas Securities, LLC | 24,448 | $561.0K | 0.00% | +24,448 | New |
| Martingale Asset Management L P | 24,542 | $563.5K | 0.01% | 00.0% | Unchanged |
| Deutsche Bank AG | 25,178 | $578.1K | 0.00% | −5,732−18.5% | Reduced |
| State of Wisconsin Investment Board | 25,332 | $581.6K | 0.00% | −260−1.0% | Reduced |
| Advisor OS, LLC | 25,405 | $583.3K | 0.06% | 00.0% | Unchanged |
| Thrivent Financial for Lutherans | 27,036 | $621.0K | 0.00% | −511−1.9% | Reduced |
| Illumine Investment Management, LLC | 27,126 | $622.8K | 0.50% | +596+2.2% | Added |
| Quest Partners LLC | 28,882 | $663.1K | 0.07% | +17,289+149.1% | Added |
| Danske Bank A/S | 29,898 | $686.5K | 0.00% | +29,898 | New |
| Great West Life Assurance Co | 30,216 | $694.0K | 0.00% | −1,046−3.3% | Reduced |
| ExodusPoint Capital Management, LP | 32,444 | $745.0K | 0.01% | −310,848−90.5% | Reduced |
| Dynamic Technology Lab Private Ltd | 33,300 | $765.0K | 0.10% | +33,300 | New |
| Aristeia Capital LLC | 33,835 | $776.9K | 0.02% | 00.0% | Unchanged |
| Polaris Capital Management, LLC | 35,100 | $805.9K | 0.05% | +4,300+14.0% | Added |
| Arkadios Wealth Advisors | 35,163 | $807.3K | 0.02% | +1,197+3.5% | Added |
| California State Teachers Retirement System | 35,877 | $823.7K | 0.00% | −492−1.4% | Reduced |
| Legato Capital Management LLC | 36,060 | $827.9K | 0.10% | +6,361+21.4% | Added |
| Edgestream Partners, L.P. | 37,112 | $852.1K | 0.02% | +37,112 | New |
| Susquehanna Portfolio Strategies, LLC | 39,564 | $908.4K | 0.02% | +39,564 | New |
| O'Shaughnessy Asset Management, LLC | 40,309 | $925.5K | 0.01% | +40,309 | New |
| Capital Fund Management S.A. | 40,570 | $931.5K | 0.01% | +40,570 | New |
| HRT Financial LP | 42,080 | $966.0K | 0.00% | −44,284−51.3% | Reduced |
| Citigroup Inc | 42,220 | $969.4K | 0.00% | −35,517−45.7% | Reduced |
| Creative Planning | 42,620 | $978.6K | 0.00% | +22,493+111.8% | Added |
| LSV Asset Management | 43,200 | $992.0K | 0.00% | 00.0% | Unchanged |
| Assetmark, Inc | 43,766 | $1.00M | 0.00% | +3,229+8.0% | Added |
| New York State Common Retirement Fund | 48,369 | $1.11M | 0.00% | −33,196−40.7% | Reduced |
| Brevan Howard Capital Management LP | 48,920 | $1.12M | 0.01% | +40,335+469.8% | Added |
| Alliancebernstein L.P. | 50,630 | $1.16M | 0.00% | 00.0% | Unchanged |
| Intech Investment Management LLC | 51,071 | $1.17M | 0.01% | −9,218−15.3% | Reduced |
| Aurora Investment Counsel | 53,253 | $1.22M | 0.64% | −828−1.5% | Reduced |
| Engineers Gate Manager LP | 53,348 | $1.22M | 0.02% | +14,803+38.4% | Added |
| Susquehanna International Group, LLP | 54,598 | $1.25M | 0.00% | −16,111−22.8% | Reduced |
| Steel Peak Wealth Management LLC | 55,795 | $1.28M | 0.05% | 00.0% | Unchanged |
| Gsa Capital Partners LLP | 57,057 | $1.31M | 0.09% | +11,760+26.0% | Added |
| Quantbot Technologies LP | 60,955 | $1.40M | 0.04% | +39,846+188.8% | Added |
| Jump Financial, LLC | 63,334 | $1.45M | 0.02% | +63,334 | New |
| UBS Group AG | 66,834 | $1.53M | 0.00% | −22,490−25.2% | Reduced |
| BNP Paribas Arbitrage, SA | 71,689 | $1.65M | 0.00% | +63,744+802.3% | Added |
| Swiss National Bank | 72,600 | $1.67M | 0.00% | −1,900−2.6% | Reduced |
| AQR Capital Management LLC | 75,845 | $1.74M | 0.00% | +22,207+41.4% | Added |
| Prudential Financial Inc | 41,951 | $1.75M | 0.00% | +4,337+11.5% | Added |
| Victory Capital Management Inc | 76,862 | $1.76M | 0.00% | −4,225−5.2% | Reduced |
| Two Sigma Investments, LP | 80,130 | $1.84M | 0.00% | +4,802+6.4% | Added |
| Nuveen, LLC | 81,142 | $1.86M | 0.00% | −14,523−15.2% | Reduced |
| Arrowstreet Capital, Limited Partnership | 81,239 | $1.87M | 0.00% | +81,239 | New |
| Barclays PLC | 82,087 | $1.88M | 0.00% | +15,135+22.6% | Added |
| Bridgeway Capital Management, LLC | 85,112 | $1.95M | 0.05% | +85,112 | New |
| Empowered Funds, LLC | 85,112 | $1.95M | 0.02% | +85,112 | New |
| Twinbeech Capital LP | 88,530 | $2.03M | 0.05% | +44,544+101.3% | Added |
| UBS Asset Management Americas Inc | 93,652 | $2.15M | 0.00% | +14,563+18.4% | Added |
| First Trust Advisors LP | 94,305 | $2.17M | 0.00% | +76,453+428.3% | Added |
| Two Sigma Advisers, LP | 95,200 | $2.19M | 0.00% | +10,500+12.4% | Added |
| Rhumbline Advisers | 95,287 | $2.19M | 0.00% | +6,329+7.1% | Added |