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 $572.4M 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 | $572.4M |
| Q1 2026 | 215 | $634.0M |
| Q4 2025 | 236 | $937.5M |
| Q3 2025 | 243 | $880.0M |
| Q2 2025 | 245 | $759.3M |
| Q1 2025 | 241 | $964.1M |
| Q4 2024 | 264 | $1.31B |
| Q3 2024 | 279 | $1.72B |
| Q2 2024 | 269 | $1.38B |
| Q1 2024 | 271 | $1.53B |
| Q4 2023 | 277 | $2.10B |
| Q3 2023 | 256 | $1.47B |
| Q2 2023 | 246 | $1.80B |
| Q1 2023 | 218 | $1.13B |
| Q4 2022 | 213 | $816.9M |
| Q3 2022 | 208 | $846.0M |
| Q2 2022 | 223 | $1.07B |
| Q1 2022 | 203 | $1.07B |
| Q4 2021 | 168 | $680.5M |
| 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 |
|---|---|---|---|---|---|
| BlackRock, Inc. | 5,668,793 | $130.2M | 0.00% | −478,865−7.8% | Reduced |
| Vanguard Group Inc | 2,686,950 | $61.7M | 0.00% | +264,046+10.9% | Added |
| TD Asset Management Inc | 2,034,930 | $46.7M | 0.04% | −177,212−8.0% | Reduced |
| Dimensional Fund Advisors LP | 1,626,884 | $37.4M | 0.01% | +270,524+19.9% | Added |
| State Street Corp | 1,576,233 | $36.2M | 0.00% | −28,381−1.8% | Reduced |
| Fuller & Thaler Asset Management, Inc. | 1,263,772 | $29.0M | 0.11% | +1740.0% | Added |
| Epoch Investment Partners, Inc. | 1,241,369 | $28.5M | 0.15% | −19,938−1.6% | Reduced |
| Boston Trust Walden Corp | 1,176,453 | $27.0M | 0.19% | −39,171−3.2% | Reduced |
| Geode Capital Management, LLC | 973,237 | $22.3M | 0.00% | +18,161+1.9% | Added |
| Marshall Wace, LLP | 848,685 | $19.5M | 0.02% | −183,037−17.7% | Reduced |
| Morgan Stanley | 681,222 | $15.6M | 0.00% | +159,110+30.5% | Added |
| Millennium Management LLC | 618,984 | $14.2M | 0.01% | −249,567−28.7% | Reduced |
| Renaissance Technologies LLC | 576,500 | $13.2M | 0.02% | +81,500+16.5% | Added |
| Qube Research & Technologies Ltd | 469,492 | $10.8M | 0.01% | +210,511+81.3% | Added |
| Northern Trust Corp | 421,136 | $9.67M | 0.00% | −173,301−29.2% | Reduced |
| Invesco Ltd. | 386,971 | $8.88M | 0.00% | +27,828+7.7% | Added |
| Hotchkis & Wiley Capital Management LLC | 365,920 | $8.40M | 0.03% | +95,770+35.5% | Added |
| Systematic Financial Management LP | 359,307 | $8.25M | 0.22% | +32,761+10.0% | Added |
| Goldman Sachs Group Inc | 356,250 | $8.18M | 0.00% | −50,462−12.4% | Reduced |
| Charles Schwab Investment Management Inc | 346,784 | $7.96M | 0.00% | +20,558+6.3% | Added |
| Pacer Advisors, Inc. | 326,098 | $7.49M | 0.02% | −153,292−32.0% | Reduced |
| Voloridge Investment Management, LLC | 325,512 | $7.47M | 0.03% | +109,510+50.7% | Added |
| Royal Bank of Canada | 318,717 | $7.32M | 0.00% | +292,638+1,122.1% | Added |
| Bank of New York Mellon Corp | 314,803 | $7.23M | 0.00% | +48,728+18.3% | Added |
| D. E. Shaw & Co., Inc. | 293,928 | $6.75M | 0.01% | +264,740+907.0% | Added |
| Citadel Advisors LLC | 292,345 | $6.71M | 0.01% | +136,366+87.4% | Added |
| Royce & Associates LP | 283,187 | $6.50M | 0.07% | +35,329+14.3% | Added |
| Price T Rowe Associates Inc | 273,288 | $6.28M | 0.00% | −267,933−49.5% | Reduced |
| Balyasny Asset Management LLC | 266,306 | $6.11M | 0.01% | +104,168+64.2% | Added |
| CX Institutional | 263,283 | $6.04M | 0.21% | +181,136+220.5% | Added |
| American Century Companies Inc | 233,161 | $5.35M | 0.00% | −74,832−24.3% | Reduced |
| Principal Financial Group Inc | 219,042 | $5.03M | 0.00% | +6,395+3.0% | Added |
| Ameriprise Financial Inc | 169,849 | $3.90M | 0.00% | +14,703+9.5% | Added |
| Jane Street Group, LLC | 160,082 | $3.68M | 0.01% | +113,417+243.0% | Added |
| JPMorgan Chase & Co | 158,114 | $3.63M | 0.00% | +91,234+136.4% | Added |
| Trexquant Investment LP | 155,229 | $3.56M | 0.04% | +63,938+70.0% | Added |
| Nordea Investment Management AB | 152,015 | $3.49M | 0.00% | +1,083+0.7% | Added |
| Bank of America Corp | 145,125 | $3.33M | 0.00% | +38,435+36.0% | Added |
| Bridge City Capital, LLC | 138,644 | $3.18M | 0.89% | +22,789+19.7% | Added |
| Lam Group, Inc. | 130,800 | $3.00M | 2.01% | 00.0% | Unchanged |
| Public Sector Pension Investment Board | 125,363 | $2.88M | 0.01% | +6,478+5.4% | Added |
| Algert Global LLC | 124,290 | $2.85M | 0.06% | +106,990+618.4% | Added |
| Raymond James Financial Inc | 117,119 | $2.69M | 0.00% | +87,447+294.7% | Added |
| Susquehanna Fundamental Investments, LLC | 101,553 | $2.33M | 0.06% | −13,533−11.8% | Reduced |
| Legal & General Group Plc | 101,154 | $2.32M | 0.00% | −422−0.4% | Reduced |
| Rhumbline Advisers | 95,287 | $2.19M | 0.00% | +6,329+7.1% | Added |
| Two Sigma Advisers, LP | 95,200 | $2.19M | 0.00% | +10,500+12.4% | Added |
| First Trust Advisors LP | 94,305 | $2.17M | 0.00% | +76,453+428.3% | Added |
| UBS Asset Management Americas Inc | 93,652 | $2.15M | 0.00% | +14,563+18.4% | Added |
| Twinbeech Capital LP | 88,530 | $2.03M | 0.05% | +44,544+101.3% | 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 |
| Barclays PLC | 82,087 | $1.88M | 0.00% | +15,135+22.6% | Added |
| Arrowstreet Capital, Limited Partnership | 81,239 | $1.87M | 0.00% | +81,239 | New |
| Nuveen, LLC | 81,142 | $1.86M | 0.00% | −14,523−15.2% | Reduced |
| Two Sigma Investments, LP | 80,130 | $1.84M | 0.00% | +4,802+6.4% | Added |
| Victory Capital Management Inc | 76,862 | $1.76M | 0.00% | −4,225−5.2% | Reduced |
| Prudential Financial Inc | 41,951 | $1.75M | 0.00% | +4,337+11.5% | Added |
| AQR Capital Management LLC | 75,845 | $1.74M | 0.00% | +22,207+41.4% | Added |
| Swiss National Bank | 72,600 | $1.67M | 0.00% | −1,900−2.6% | Reduced |
| BNP Paribas Arbitrage, SA | 71,689 | $1.65M | 0.00% | +63,744+802.3% | Added |
| UBS Group AG | 66,834 | $1.53M | 0.00% | −22,490−25.2% | Reduced |
| Jump Financial, LLC | 63,334 | $1.45M | 0.02% | +63,334 | New |
| Quantbot Technologies LP | 60,955 | $1.40M | 0.04% | +39,846+188.8% | Added |
| Gsa Capital Partners LLP | 57,057 | $1.31M | 0.09% | +11,760+26.0% | Added |
| Steel Peak Wealth Management LLC | 55,795 | $1.28M | 0.05% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 54,598 | $1.25M | 0.00% | −16,111−22.8% | Reduced |
| Engineers Gate Manager LP | 53,348 | $1.22M | 0.02% | +14,803+38.4% | Added |
| Aurora Investment Counsel | 53,253 | $1.22M | 0.64% | −828−1.5% | Reduced |
| Intech Investment Management LLC | 51,071 | $1.17M | 0.01% | −9,218−15.3% | Reduced |
| Alliancebernstein L.P. | 50,630 | $1.16M | 0.00% | 00.0% | Unchanged |
| Brevan Howard Capital Management LP | 48,920 | $1.12M | 0.01% | +40,335+469.8% | Added |
| New York State Common Retirement Fund | 48,369 | $1.11M | 0.00% | −33,196−40.7% | Reduced |
| Assetmark, Inc | 43,766 | $1.00M | 0.00% | +3,229+8.0% | Added |
| LSV Asset Management | 43,200 | $992.0K | 0.00% | 00.0% | Unchanged |
| Creative Planning | 42,620 | $978.6K | 0.00% | +22,493+111.8% | Added |
| Citigroup Inc | 42,220 | $969.4K | 0.00% | −35,517−45.7% | Reduced |
| HRT Financial LP | 42,080 | $966.0K | 0.00% | −44,284−51.3% | Reduced |
| Capital Fund Management S.A. | 40,570 | $931.5K | 0.01% | +40,570 | New |
| O'Shaughnessy Asset Management, LLC | 40,309 | $925.5K | 0.01% | +40,309 | New |
| Susquehanna Portfolio Strategies, LLC | 39,564 | $908.4K | 0.02% | +39,564 | New |
| Edgestream Partners, L.P. | 37,112 | $852.1K | 0.02% | +37,112 | New |
| Legato Capital Management LLC | 36,060 | $827.9K | 0.10% | +6,361+21.4% | Added |
| California State Teachers Retirement System | 35,877 | $823.7K | 0.00% | −492−1.4% | Reduced |
| Arkadios Wealth Advisors | 35,163 | $807.3K | 0.02% | +1,197+3.5% | Added |
| Polaris Capital Management, LLC | 35,100 | $805.9K | 0.05% | +4,300+14.0% | Added |
| Aristeia Capital LLC | 33,835 | $776.9K | 0.02% | 00.0% | Unchanged |
| Dynamic Technology Lab Private Ltd | 33,300 | $765.0K | 0.10% | +33,300 | New |
| ExodusPoint Capital Management, LP | 32,444 | $745.0K | 0.01% | −310,848−90.5% | Reduced |
| Great West Life Assurance Co | 30,216 | $694.0K | 0.00% | −1,046−3.3% | Reduced |
| Danske Bank A/S | 29,898 | $686.5K | 0.00% | +29,898 | New |
| Quest Partners LLC | 28,882 | $663.1K | 0.07% | +17,289+149.1% | Added |
| Illumine Investment Management, LLC | 27,126 | $622.8K | 0.50% | +596+2.2% | Added |
| Thrivent Financial for Lutherans | 27,036 | $621.0K | 0.00% | −511−1.9% | Reduced |
| Advisor OS, LLC | 25,405 | $583.3K | 0.06% | 00.0% | Unchanged |
| State of Wisconsin Investment Board | 25,332 | $581.6K | 0.00% | −260−1.0% | Reduced |
| Deutsche Bank AG | 25,178 | $578.1K | 0.00% | −5,732−18.5% | Reduced |
| Martingale Asset Management L P | 24,542 | $563.5K | 0.01% | 00.0% | Unchanged |
| SG Americas Securities, LLC | 24,448 | $561.0K | 0.00% | +24,448 | New |
| Wells Fargo & Company | 24,396 | $560.1K | 0.00% | −4,965−16.9% | Reduced |