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, Q1 2025
Institutional positions in Amphastar Pharmaceuticals, Inc. as of Mar 31, 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
- 241
- −18 vs. Q4 2024
- Shares held
- 33.2M
- −1.45M (−4.2%) vs. Q4 2024
- Total value
- $963.6M
- −$324.6M (−25.2%) vs. Q4 2024
- New holders
- 32
- 81 more added
- Sold out
- 50
- 95 more reduced
5 institutions that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2025
Shares, value and share of portfolio for each institution holding Amphastar Pharmaceuticals, Inc.; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| China Universal Asset Management Co., Ltd. | 9,644 | $279.6K | 0.03% | −551−5.4% | Reduced |
| Cim, LLC | 9,888 | $286.7K | 0.04% | −190−1.9% | Reduced |
| Envestnet Asset Management Inc | 9,938 | $288.1K | 0.00% | −22,265−69.1% | Reduced |
| Significant Wealth Partners LLC | 10,215 | $296.1K | 0.15% | +3,080+43.2% | Added |
| Pathstone Holdings, LLC | 10,328 | $299.7K | 0.00% | +634+6.5% | Added |
| Teacher Retirement System of Texas | 10,358 | $300.3K | 0.00% | −1,190−10.3% | Reduced |
| Amalgamated Bank | 10,761 | $312.0K | 0.00% | −237−2.2% | Reduced |
| Gotham Asset Management, LLC | 10,870 | $315.1K | 0.00% | −17,578−61.8% | Reduced |
| State Board of Administration of Florida Retirement System | 10,913 | $316.4K | 0.00% | 00.0% | Unchanged |
| Maryland State Retirement & Pension System | 10,936 | $317.0K | 0.01% | −1,694−13.4% | Reduced |
| Arizona State Retirement System | 11,012 | $319.2K | 0.00% | −292−2.6% | Reduced |
| ProShare Advisors LLC | 11,077 | $321.1K | 0.00% | −2,775−20.0% | Reduced |
| Yousif Capital Management, LLC | 11,115 | $322.2K | 0.00% | −231−2.0% | Reduced |
| Segall Bryant & Hamill, LLC | 11,185 | $324.3K | 0.00% | −7,696−40.8% | Reduced |
| Profund Advisors LLC | 11,256 | $326.3K | 0.01% | +3,336+42.1% | Added |
| Comerica Bank | 11,563 | $335.2K | 0.00% | −242−2.0% | Reduced |
| Quest Partners LLC | 11,593 | $336.1K | 0.04% | +6,731+138.4% | Added |
| Teachers Retirement System of the State of Kentucky | 11,691 | $338.0K | 0.00% | 00.0% | Unchanged |
| Cynosure Management, LLC | 12,401 | $359.5K | 0.05% | +4,783+62.8% | Added |
| Cambridge Investment Research Advisors, Inc. | 13,790 | $400.0K | 0.00% | +1,694+14.0% | Added |
| Advisory Research Inc | 13,889 | $402.6K | 0.07% | +36+0.3% | Added |
| Amundi | 14,925 | $406.6K | 0.00% | −4,658−23.8% | Reduced |
| LPL Financial LLC | 14,300 | $414.6K | 0.00% | −6,066−29.8% | Reduced |
| Handelsbanken Fonder AB | 14,400 | $417.0K | 0.00% | 00.0% | Unchanged |
| Allspring Global Investments Holdings, LLC | 15,326 | $433.6K | 0.00% | +1,262+9.0% | Added |
| Assenagon Asset Management S.A. | 15,216 | $441.1K | 0.00% | −146,183−90.6% | Reduced |
| Advisor Group Holdings, Inc. | 16,142 | $467.9K | 0.00% | −58−0.4% | Reduced |
| Wellington Management Group LLP | 16,913 | $490.3K | 0.00% | −871−4.9% | Reduced |
| Algert Global LLC | 17,300 | $501.5K | 0.01% | +17,300 | New |
| Louisiana State Employees Retirement System | 17,700 | $513.1K | 0.01% | −400−2.2% | Reduced |
| First Trust Advisors LP | 17,852 | $517.5K | 0.00% | −63,277−78.0% | Reduced |
| Voya Investment Management LLC | 18,142 | $525.9K | 0.00% | +1,357+8.1% | Added |
| XTX Topco Ltd | 18,358 | $532.2K | 0.03% | +18,358 | New |
| Corebridge Financial, Inc. | 19,756 | $572.7K | 0.00% | −693−3.4% | Reduced |
| Manufacturers Life Insurance Company, The | 19,826 | $574.8K | 0.00% | −1,431−6.7% | Reduced |
| DekaBank Deutsche Girozentrale | 20,848 | $580.0K | 0.00% | 00.0% | Unchanged |
| Creative Planning | 20,127 | $583.5K | 0.00% | +20,114+154,723.1% | Added |
| Jain Global LLC | 20,136 | $583.7K | 0.01% | +2,162+12.0% | Added |
| Franklin Resources Inc | 20,260 | $587.3K | 0.00% | −7,145−26.1% | Reduced |
| Illinois Municipal Retirement Fund | 20,355 | $590.1K | 0.01% | −604−2.9% | Reduced |
| State of Alaska, Department of Revenue | 20,781 | $602.0K | 0.01% | −544−2.6% | Reduced |
| Quantbot Technologies LP | 21,109 | $612.0K | 0.02% | −4,345−17.1% | Reduced |
| Tudor Investment Corp Et Al | 21,793 | $631.8K | 0.01% | +21,793 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 22,489 | $652.0K | 0.00% | +613+2.8% | Added |
| MetLife Investment Management | 23,093 | $669.5K | 0.00% | −359−1.5% | Reduced |
| New York State Teachers Retirement System | 23,866 | $692.0K | 0.00% | 00.0% | Unchanged |
| Martingale Asset Management L P | 24,542 | $711.5K | 0.02% | −15,663−39.0% | Reduced |
| Advisor OS, LLC | 25,405 | $736.5K | 0.08% | 00.0% | Unchanged |
| State of Wisconsin Investment Board | 25,592 | $741.9K | 0.00% | −57−0.2% | Reduced |
| Royal Bank of Canada | 26,079 | $756.0K | 0.00% | −2,553−8.9% | Reduced |
| Graham Capital Management, L.P. | 26,424 | $766.0K | 0.02% | +26,424 | New |
| Illumine Investment Management, LLC | 26,530 | $769.1K | 0.63% | +9,481+55.6% | Added |
| Thrivent Financial for Lutherans | 27,547 | $799.0K | 0.00% | −1,441−5.0% | Reduced |
| D. E. Shaw & Co., Inc. | 29,188 | $846.2K | 0.00% | −89,663−75.4% | Reduced |
| Wells Fargo & Company | 29,361 | $851.2K | 0.00% | +5,809+24.7% | Added |
| Raymond James Financial Inc | 29,672 | $860.2K | 0.00% | −63,232−68.1% | Reduced |
| Legato Capital Management LLC | 29,699 | $861.0K | 0.12% | +11,238+60.9% | Added |
| Polaris Capital Management, LLC | 30,800 | $892.9K | 0.05% | +6,300+25.7% | Added |
| Deutsche Bank AG | 30,910 | $896.1K | 0.00% | −3,172−9.3% | Reduced |
| Great West Life Assurance Co | 31,262 | $907.0K | 0.00% | −3,783−10.8% | Reduced |
| Hussman Strategic Advisors, Inc. | 31,500 | $913.2K | 0.22% | +31,500 | New |
| Connor, Clark & Lunn Investment Management Ltd. | 32,241 | $934.7K | 0.00% | −35,126−52.1% | Reduced |
| Aristeia Capital LLC | 33,835 | $980.9K | 0.03% | −9,400−21.7% | Reduced |
| Arkadios Wealth Advisors | 33,966 | $984.7K | 0.04% | +6,002+21.5% | Added |
| Numerai GP LLC | 34,006 | $985.8K | 0.19% | +34,006 | New |
| California State Teachers Retirement System | 36,369 | $1.05M | 0.00% | 00.0% | Unchanged |
| Man Group plc | 38,237 | $1.11M | 0.00% | +16,412+75.2% | Added |
| Engineers Gate Manager LP | 38,545 | $1.12M | 0.02% | +9,437+32.4% | Added |
| Assetmark, Inc | 40,537 | $1.18M | 0.00% | −1,384−3.3% | Reduced |
| LSV Asset Management | 43,200 | $1.25M | 0.00% | +6,800+18.7% | Added |
| Twinbeech Capital LP | 43,986 | $1.28M | 0.02% | −2,811−6.0% | Reduced |
| Gsa Capital Partners LLP | 45,297 | $1.31M | 0.12% | +27,863+159.8% | Added |
| Campbell & CO Investment Adviser LLC | 45,789 | $1.33M | 0.10% | −1,777−3.7% | Reduced |
| Jane Street Group, LLC | 46,665 | $1.35M | 0.00% | −52,822−53.1% | Reduced |
| Alliancebernstein L.P. | 50,630 | $1.47M | 0.00% | 00.0% | Unchanged |
| AQR Capital Management LLC | 53,638 | $1.55M | 0.00% | +24,167+82.0% | Added |
| Aurora Investment Counsel | 54,081 | $1.57M | 0.87% | −624−1.1% | Reduced |
| Steel Peak Wealth Management LLC | 55,795 | $1.62M | 0.07% | +55,795 | New |
| Prudential Financial Inc | 37,614 | $1.67M | 0.00% | −1,080−2.8% | Reduced |
| Intech Investment Management LLC | 60,289 | $1.75M | 0.02% | +18,133+43.0% | Added |
| JPMorgan Chase & Co | 66,880 | $1.94M | 0.00% | −86,691−56.5% | Reduced |
| Barclays PLC | 66,952 | $1.94M | 0.00% | −17,838−21.0% | Reduced |
| Squarepoint Ops LLC | 69,770 | $2.02M | 0.00% | +52,106+295.0% | Added |
| Susquehanna International Group, LLP | 70,709 | $2.05M | 0.00% | +39,443+126.2% | Added |
| Swiss National Bank | 74,500 | $2.16M | 0.00% | −1,900−2.5% | Reduced |
| Two Sigma Investments, LP | 75,328 | $2.18M | 0.00% | −22,856−23.3% | Reduced |
| Citigroup Inc | 77,737 | $2.25M | 0.00% | +14,566+23.1% | Added |
| UBS Asset Management Americas Inc | 79,089 | $2.29M | 0.00% | −4,142−5.0% | Reduced |
| Victory Capital Management Inc | 81,087 | $2.35M | 0.00% | +17,700+27.9% | Added |
| New York State Common Retirement Fund | 81,565 | $2.36M | 0.00% | +11,075+15.7% | Added |
| CX Institutional | 82,147 | $2.38M | 0.09% | +82,147 | New |
| Two Sigma Advisers, LP | 84,700 | $2.46M | 0.01% | −1,200−1.4% | Reduced |
| HRT Financial LP | 86,364 | $2.50M | 0.02% | +86,364 | New |
| Rhumbline Advisers | 88,958 | $2.58M | 0.00% | +1,631+1.9% | Added |
| UBS Group AG | 89,324 | $2.59M | 0.00% | −64,418−41.9% | Reduced |
| Trexquant Investment LP | 91,291 | $2.65M | 0.03% | −14,237−13.5% | Reduced |
| Nuveen, LLC | 95,665 | $2.77M | 0.00% | +95,665 | New |
| Legal & General Group Plc | 101,576 | $2.94M | 0.00% | −2,165−2.1% | Reduced |
| Bank of America Corp | 106,690 | $3.09M | 0.00% | −5,404−4.8% | Reduced |
| Susquehanna Fundamental Investments, LLC | 115,086 | $3.34M | 0.06% | +115,086 | New |