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, Q3 2025
Institutional positions in Amphastar Pharmaceuticals, Inc. as of Sep 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
- 243
- 0 vs. Q2 2025
- Shares held
- 32.7M
- +30.4K (+0.1%) vs. Q2 2025
- Total value
- $872.8M
- +$120.8M (+16.1%) vs. Q2 2025
- New holders
- 34
- 82 more added
- Sold out
- 34
- 92 more reduced
2 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Amphastar Pharmaceuticals, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| State of Tennessee, Treasury Department | 9,300 | $247.8K | 0.00% | 00.0% | Unchanged |
| Teacher Retirement System of Texas | 9,356 | $249.3K | 0.00% | −895−8.7% | Reduced |
| Vestcor Inc | 9,383 | $250.0K | 0.01% | 00.0% | Unchanged |
| Comerica Bank | 9,465 | $252.2K | 0.00% | −2,088−18.1% | Reduced |
| Franklin Resources Inc | 9,525 | $253.8K | 0.00% | +9,525 | New |
| Exchange Traded Concepts, LLC | 9,985 | $266.1K | 0.00% | +154+1.6% | Added |
| Police & Firemen's Retirement System of New Jersey | 10,263 | $273.5K | 0.00% | +1,975+23.8% | Added |
| Teachers Retirement System of the State of Kentucky | 10,523 | $280.0K | 0.00% | −1,168−10.0% | Reduced |
| Amalgamated Bank | 10,494 | $280.0K | 0.00% | −55−0.5% | Reduced |
| State Board of Administration of Florida Retirement System | 10,913 | $290.8K | 0.00% | 00.0% | Unchanged |
| JustInvest LLC | 11,004 | $293.3K | 0.00% | −1,620−12.8% | Reduced |
| Arizona State Retirement System | 11,145 | $297.0K | 0.00% | +55+0.5% | Added |
| Segall Bryant & Hamill, LLC | 11,185 | $298.1K | 0.00% | 00.0% | Unchanged |
| Cim, LLC | 11,628 | $309.9K | 0.04% | +199+1.7% | Added |
| Sterling Capital Management LLC | 11,667 | $310.9K | 0.00% | +1,450+14.2% | Added |
| Hohimer Wealth Management, LLC | 11,972 | $319.1K | 0.04% | +127+1.1% | Added |
| SEI Investments Co | 11,972 | $319.1K | 0.00% | −700−5.5% | Reduced |
| Susquehanna Fundamental Investments, LLC | 12,568 | $334.9K | 0.01% | −88,985−87.6% | Reduced |
| Polaris Capital Management, LLC | 13,100 | $349.1K | 0.02% | −22,000−62.7% | Reduced |
| Quantinno Capital Management LP | 13,260 | $353.4K | 0.00% | +1,991+17.7% | Added |
| Janney Montgomery Scott LLC | 13,405 | $357.0K | 0.00% | +13,405 | New |
| Brevan Howard Capital Management LP | 13,489 | $359.5K | 0.01% | −35,431−72.4% | Reduced |
| Virginia Retirement Systems Et Al | 13,562 | $361.4K | 0.00% | +4,800+54.8% | Added |
| Handelsbanken Fonder AB | 14,400 | $384.0K | 0.00% | 00.0% | Unchanged |
| PDT Partners, LLC | 14,630 | $389.9K | 0.02% | 00.0% | Unchanged |
| LPL Financial LLC | 14,645 | $390.3K | 0.00% | +14,645 | New |
| Jackson Creek Investment Advisors LLC | 14,743 | $393.0K | 0.11% | +14,743 | New |
| Assenagon Asset Management S.A. | 15,216 | $405.5K | 0.00% | −1,394−8.4% | Reduced |
| Gotham Asset Management, LLC | 15,364 | $409.5K | 0.00% | +1,350+9.6% | Added |
| Advisory Research Inc | 15,468 | $412.2K | 0.05% | +570+3.8% | Added |
| CI Private Wealth, LLC | 15,723 | $419.0K | 0.00% | +15,723 | New |
| Alps Advisors Inc | 16,250 | $433.1K | 0.00% | +16,250 | New |
| Louisiana State Employees Retirement System | 16,500 | $439.7K | 0.01% | −700−4.1% | Reduced |
| Janus Henderson Group PLC | 16,868 | $449.4K | 0.00% | 00.0% | Unchanged |
| Wellington Management Group LLP | 17,199 | $458.4K | 0.00% | +1,581+10.1% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 17,242 | $459.5K | 0.00% | −3,096−15.2% | Reduced |
| Manufacturers Life Insurance Company, The | 17,762 | $473.4K | 0.00% | −926−5.0% | Reduced |
| Cynosure Management, LLC | 17,820 | $474.9K | 0.05% | 00.0% | Unchanged |
| Vident Advisory, LLC | 18,431 | $491.2K | 0.00% | +1,152+6.7% | Added |
| Martingale Asset Management L P | 18,521 | $493.6K | 0.01% | −6,021−24.5% | Reduced |
| Los Angeles Capital Management LLC | 18,938 | $504.7K | 0.00% | +18,938 | New |
| Citigroup Inc | 19,815 | $528.1K | 0.00% | −22,405−53.1% | Reduced |
| Significant Wealth Partners LLC | 20,579 | $548.4K | 0.27% | +4,401+27.2% | Added |
| DekaBank Deutsche Girozentrale | 20,848 | $550.0K | 0.00% | 00.0% | Unchanged |
| Canada Pension Plan Investment Board | 20,700 | $551.7K | 0.00% | +16,500+392.9% | Added |
| Illinois Municipal Retirement Fund | 20,747 | $552.9K | 0.01% | +810+4.1% | Added |
| State of Alaska, Department of Revenue | 20,788 | $553.0K | 0.01% | −1,104−5.0% | Reduced |
| State of Wisconsin Investment Board | 21,334 | $568.6K | 0.00% | −3,998−15.8% | Reduced |
| Lighthouse Investment Partners, LLC | 21,600 | $575.6K | 0.02% | +21,600 | New |
| Envestnet Asset Management Inc | 21,975 | $585.6K | 0.00% | +21,975 | New |
| Two Sigma Advisers, LP | 22,800 | $607.6K | 0.00% | −72,400−76.1% | Reduced |
| Danske Bank A/S | 23,043 | $614.1K | 0.00% | −6,855−22.9% | Reduced |
| MetLife Investment Management | 23,093 | $615.4K | 0.00% | 00.0% | Unchanged |
| New York State Teachers Retirement System | 23,328 | $622.0K | 0.00% | −404−1.7% | Reduced |
| Y-Intercept (Hong Kong) Ltd | 25,090 | $668.6K | 0.02% | +7,363+41.5% | Added |
| Advisor OS, LLC | 25,405 | $677.0K | 0.06% | 00.0% | Unchanged |
| Thrivent Financial for Lutherans | 25,828 | $688.0K | 0.00% | −1,208−4.5% | Reduced |
| Illumine Investment Management, LLC | 27,677 | $737.6K | 0.53% | +551+2.0% | Added |
| Deutsche Bank AG | 28,396 | $756.8K | 0.00% | +3,218+12.8% | Added |
| Wells Fargo & Company | 28,751 | $766.2K | 0.00% | +4,355+17.9% | Added |
| Quantbot Technologies LP | 29,763 | $793.2K | 0.02% | −31,192−51.2% | Reduced |
| Great West Life Assurance Co | 30,216 | $813.0K | 0.00% | 00.0% | Unchanged |
| Man Group plc | 32,385 | $863.1K | 0.00% | +12,085+59.5% | Added |
| Advisor Group Holdings, Inc. | 31,614 | $892.1K | 0.00% | +16,378+107.5% | Added |
| California State Teachers Retirement System | 35,879 | $956.2K | 0.00% | +20.0% | Added |
| Arkadios Wealth Advisors | 36,008 | $959.6K | 0.02% | +845+2.4% | Added |
| Legato Capital Management LLC | 36,060 | $961.0K | 0.10% | 00.0% | Unchanged |
| SummerHaven Investment Management, LLC | 38,200 | $1.02M | 0.59% | +38,200 | New |
| Susquehanna Portfolio Strategies, LLC | 39,564 | $1.05M | 0.02% | 00.0% | Unchanged |
| Campbell & CO Investment Adviser LLC | 44,068 | $1.17M | 0.09% | +21,635+96.4% | Added |
| Acadian Asset Management LLC | 44,349 | $1.18M | 0.00% | +44,349 | New |
| Quantedge Capital Pte Ltd | 45,100 | $1.20M | 0.66% | +45,100 | New |
| Prudential Financial Inc | 47,429 | $1.26M | 0.00% | +5,478+13.1% | Added |
| Squarepoint Ops LLC | 49,310 | $1.31M | 0.00% | +26,284+114.1% | Added |
| Royal Bank of Canada | 49,671 | $1.32M | 0.00% | −269,046−84.4% | Reduced |
| Alliancebernstein L.P. | 50,630 | $1.35M | 0.00% | 00.0% | Unchanged |
| Intech Investment Management LLC | 51,160 | $1.36M | 0.01% | +89+0.2% | Added |
| UBS Asset Management Americas Inc | 54,335 | $1.45M | 0.00% | −39,317−42.0% | Reduced |
| Creative Planning | 55,115 | $1.47M | 0.00% | +12,495+29.3% | Added |
| Steel Peak Wealth Management LLC | 55,695 | $1.48M | 0.05% | −100−0.2% | Reduced |
| Assetmark, Inc | 56,487 | $1.51M | 0.00% | +12,721+29.1% | Added |
| AQR Capital Management LLC | 62,145 | $1.66M | 0.00% | −13,700−18.1% | Reduced |
| CX Institutional | 63,316 | $1.69M | 0.05% | −199,967−76.0% | Reduced |
| Barclays PLC | 66,494 | $1.77M | 0.00% | −15,593−19.0% | Reduced |
| O'Shaughnessy Asset Management, LLC | 69,058 | $1.84M | 0.01% | +28,749+71.3% | Added |
| Swiss National Bank | 72,600 | $1.93M | 0.00% | 00.0% | Unchanged |
| LSV Asset Management | 73,300 | $1.95M | 0.00% | +30,100+69.7% | Added |
| Nuveen, LLC | 77,703 | $2.07M | 0.00% | −3,439−4.2% | Reduced |
| HRT Financial LP | 77,746 | $2.07M | 0.01% | +35,666+84.8% | Added |
| Jefferies Financial Group Inc. | 89,233 | $2.38M | 0.02% | +89,233 | New |
| Rhumbline Advisers | 90,129 | $2.40M | 0.00% | −5,158−5.4% | Reduced |
| New York State Common Retirement Fund | 90,169 | $2.40M | 0.00% | +41,800+86.4% | Added |
| Legal & General Group Plc | 97,614 | $2.60M | 0.00% | −3,540−3.5% | Reduced |
| Two Sigma Investments, LP | 98,678 | $2.63M | 0.00% | +18,548+23.1% | Added |
| Raymond James Financial Inc | 118,187 | $3.15M | 0.00% | +1,068+0.9% | Added |
| Bank of America Corp | 127,097 | $3.39M | 0.00% | −18,028−12.4% | Reduced |
| Rice Hall James & Associates, LLC | 129,339 | $3.45M | 0.19% | +129,339 | New |
| Ameriprise Financial Inc | 129,841 | $3.46M | 0.00% | −40,008−23.6% | Reduced |
| Lam Group, Inc. | 130,800 | $3.49M | 2.16% | 00.0% | Unchanged |
| Denali Advisors LLC | 135,000 | $3.60M | 0.41% | +135,000 | New |