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 2025
Institutional positions in Amphastar Pharmaceuticals, Inc. as of Dec 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
- 236
- −6 vs. Q3 2025
- Shares held
- 33.6M
- +837.1K (+2.6%) vs. Q3 2025
- Total value
- $899.7M
- +$27.0M (+3.1%) vs. Q3 2025
- New holders
- 26
- 94 more added
- Sold out
- 32
- 87 more reduced
1 institution that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Amphastar Pharmaceuticals, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Police & Firemen's Retirement System of New Jersey | 10,263 | $274.8K | 0.00% | 00.0% | Unchanged |
| Amalgamated Bank | 10,419 | $279.0K | 0.00% | −75−0.7% | Reduced |
| Arizona State Retirement System | 10,428 | $279.3K | 0.00% | −717−6.4% | Reduced |
| JustInvest LLC | 10,462 | $280.2K | 0.00% | −542−4.9% | Reduced |
| State Board of Administration of Florida Retirement System | 10,913 | $292.3K | 0.00% | 00.0% | Unchanged |
| Profund Advisors LLC | 11,121 | $297.8K | 0.01% | +2,933+35.8% | Added |
| Segall Bryant & Hamill, LLC | 11,185 | $299.5K | 0.00% | 00.0% | Unchanged |
| Cim, LLC | 11,342 | $303.7K | 0.04% | −286−2.5% | Reduced |
| Virginia Retirement Systems Et Al | 12,362 | $331.1K | 0.00% | −1,200−8.8% | Reduced |
| Martingale Asset Management L P | 12,400 | $332.1K | 0.01% | −6,121−33.0% | Reduced |
| Advisor Group Holdings, Inc. | 12,854 | $344.2K | 0.00% | −18,760−59.3% | Reduced |
| Man Group plc | 14,151 | $379.0K | 0.00% | −18,234−56.3% | Reduced |
| Janney Montgomery Scott LLC | 14,230 | $381.0K | 0.00% | +825+6.2% | Added |
| Quantbot Technologies LP | 14,515 | $388.7K | 0.01% | −15,248−51.2% | Reduced |
| SEI Investments Co | 14,649 | $392.3K | 0.00% | +2,677+22.4% | Added |
| MML Investors Services, LLC | 14,661 | $392.6K | 0.00% | +6,199+73.3% | Added |
| Deerfield Management Company, L.P. (Series C) | 14,852 | $397.7K | 0.01% | +14,852 | New |
| Squarepoint Ops LLC | 14,860 | $398.0K | 0.00% | −34,450−69.9% | Reduced |
| ExodusPoint Capital Management, LP | 14,929 | $399.8K | 0.00% | +14,929 | New |
| Advisory Research Inc | 15,161 | $406.0K | 0.05% | −307−2.0% | Reduced |
| Assenagon Asset Management S.A. | 15,216 | $407.5K | 0.00% | 00.0% | Unchanged |
| Quantinno Capital Management LP | 15,568 | $416.9K | 0.00% | +2,308+17.4% | Added |
| Louisiana State Employees Retirement System | 16,200 | $433.8K | 0.01% | −300−1.8% | Reduced |
| Vestcor Inc | 16,383 | $439.0K | 0.01% | +7,000+74.6% | Added |
| Manufacturers Life Insurance Company, The | 16,402 | $439.2K | 0.00% | −1,360−7.7% | Reduced |
| Alps Advisors Inc | 16,431 | $440.0K | 0.00% | +181+1.1% | Added |
| Sterling Capital Management LLC | 16,602 | $444.6K | 0.01% | +4,935+42.3% | Added |
| Janus Henderson Group PLC | 16,868 | $451.8K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global ETFs Holdings Ltd. | 16,879 | $452.0K | 0.00% | −363−2.1% | Reduced |
| State of Wisconsin Investment Board | 17,506 | $468.8K | 0.00% | −3,828−17.9% | Reduced |
| Los Angeles Capital Management LLC | 19,397 | $478.3K | 0.00% | +459+2.4% | Added |
| LPL Financial LLC | 19,844 | $531.4K | 0.00% | +5,199+35.5% | Added |
| Vident Advisory, LLC | 20,409 | $546.6K | 0.01% | +1,978+10.7% | Added |
| Brevan Howard Capital Management LP | 20,465 | $548.1K | 0.01% | +6,976+51.7% | Added |
| Round Rock Advisors, LLC | 20,477 | $548.4K | 0.08% | +11,897+138.7% | Added |
| Illinois Municipal Retirement Fund | 20,913 | $560.0K | 0.01% | +166+0.8% | Added |
| MetLife Investment Management | 21,075 | $564.4K | 0.00% | −2,018−8.7% | Reduced |
| New York State Teachers Retirement System | 22,977 | $615.0K | 0.00% | −351−1.5% | Reduced |
| Federated Hermes, Inc. | 23,537 | $630.3K | 0.00% | +23,537 | New |
| Thrivent Financial for Lutherans | 24,313 | $651.0K | 0.00% | −1,515−5.9% | Reduced |
| Advisor OS, LLC | 25,405 | $680.3K | 0.05% | 00.0% | Unchanged |
| Franklin Resources Inc | 26,045 | $697.5K | 0.00% | +16,520+173.4% | Added |
| Arkadios Wealth Advisors | 26,303 | $704.4K | 0.01% | −9,705−27.0% | Reduced |
| Legato Capital Management LLC | 26,590 | $712.1K | 0.06% | −9,470−26.3% | Reduced |
| Freestone Grove Partners LP | 27,593 | $738.9K | 0.01% | +27,593 | New |
| Gotham Asset Management, LLC | 27,802 | $744.5K | 0.00% | +12,438+81.0% | Added |
| State of Alaska, Department of Revenue | 27,916 | $747.0K | 0.01% | +7,128+34.3% | Added |
| Citigroup Inc | 28,280 | $757.3K | 0.00% | +8,465+42.7% | Added |
| Illumine Investment Management, LLC | 28,328 | $758.6K | 0.55% | +651+2.4% | Added |
| Envestnet Asset Management Inc | 28,823 | $771.9K | 0.00% | +6,848+31.2% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 29,104 | $785.3K | 0.00% | +29,104 | New |
| Deutsche Bank AG | 29,557 | $791.5K | 0.00% | +1,161+4.1% | Added |
| Canada Pension Plan Investment Board | 29,800 | $798.0K | 0.00% | +9,100+44.0% | Added |
| Great West Life Assurance Co | 30,216 | $809.0K | 0.00% | 00.0% | Unchanged |
| Campbell & CO Investment Adviser LLC | 30,682 | $821.7K | 0.04% | −13,386−30.4% | Reduced |
| DekaBank Deutsche Girozentrale | 20,848 | $951.0K | 0.00% | 00.0% | Unchanged |
| Polaris Capital Management, LLC | 35,532 | $951.5K | 0.08% | +22,432+171.2% | Added |
| California State Teachers Retirement System | 35,798 | $958.7K | 0.00% | −81−0.2% | Reduced |
| Price T Rowe Associates Inc | 36,796 | $986.0K | 0.00% | −238,426−86.6% | Reduced |
| SummerHaven Investment Management, LLC | 38,200 | $1.02M | 0.58% | 00.0% | Unchanged |
| Wells Fargo & Company | 45,302 | $1.21M | 0.00% | +16,551+57.6% | Added |
| Prudential Financial Inc | 47,203 | $1.26M | 0.00% | −226−0.5% | Reduced |
| XTX Topco Ltd | 48,607 | $1.30M | 0.03% | +48,607 | New |
| Creative Planning | 51,664 | $1.38M | 0.00% | −3,451−6.3% | Reduced |
| Assetmark, Inc | 54,359 | $1.46M | 0.00% | −2,128−3.8% | Reduced |
| UBS Asset Management Americas Inc | 55,232 | $1.48M | 0.00% | +897+1.7% | Added |
| Steel Peak Wealth Management LLC | 55,695 | $1.49M | 0.05% | 00.0% | Unchanged |
| Alliancebernstein L.P. | 60,630 | $1.62M | 0.00% | +10,000+19.8% | Added |
| CIBC World Markets Inc. | 62,192 | $1.67M | 0.00% | +62,192 | New |
| Intech Investment Management LLC | 63,232 | $1.69M | 0.02% | +12,072+23.6% | Added |
| CX Institutional | 64,123 | $1.72M | 0.05% | +807+1.3% | Added |
| Susquehanna Portfolio Strategies, LLC | 66,969 | $1.79M | 0.03% | +27,405+69.3% | Added |
| AQR Capital Management LLC | 67,652 | $1.81M | 0.00% | +5,507+8.9% | Added |
| Swiss National Bank | 72,600 | $1.94M | 0.00% | 00.0% | Unchanged |
| Barclays PLC | 75,319 | $2.02M | 0.00% | +8,825+13.3% | Added |
| Nuveen, LLC | 76,101 | $2.04M | 0.00% | −1,602−2.1% | Reduced |
| Balyasny Asset Management LLC | 77,467 | $2.07M | 0.00% | −64,385−45.4% | Reduced |
| Rhumbline Advisers | 82,390 | $2.21M | 0.00% | −7,739−8.6% | Reduced |
| Raymond James Financial Inc | 84,454 | $2.26M | 0.00% | −33,733−28.5% | Reduced |
| O'Shaughnessy Asset Management, LLC | 87,183 | $2.33M | 0.01% | +18,125+26.2% | Added |
| Legal & General Group Plc | 90,730 | $2.43M | 0.00% | −6,884−7.1% | Reduced |
| Quantedge Capital Pte Ltd | 91,700 | $2.46M | 1.17% | +46,600+103.3% | Added |
| SG Americas Securities, LLC | 93,515 | $2.50M | 0.00% | +93,515 | New |
| Two Sigma Investments, LP | 98,678 | $2.64M | 0.00% | 00.0% | Unchanged |
| Brandywine Global Investment Management, LLC | 105,417 | $2.82M | 0.02% | +105,417 | New |
| LSV Asset Management | 110,300 | $2.95M | 0.01% | +37,000+50.5% | Added |
| Qube Research & Technologies Ltd | 111,439 | $2.98M | 0.00% | −129,773−53.8% | Reduced |
| Trexquant Investment LP | 113,673 | $3.04M | 0.03% | +113,673 | New |
| BNP Paribas Arbitrage, SA | 120,893 | $3.24M | 0.00% | −101,126−45.5% | Reduced |
| Bessemer Group Inc | 120,890 | $3.24M | 0.00% | +120,747+84,438.5% | Added |
| Rice Hall James & Associates, LLC | 121,176 | $3.25M | 0.18% | −8,163−6.3% | Reduced |
| Public Sector Pension Investment Board | 122,505 | $3.28M | 0.01% | −17,170−12.3% | Reduced |
| Algert Global LLC | 125,130 | $3.35M | 0.05% | −267,772−68.2% | Reduced |
| New York State Common Retirement Fund | 125,968 | $3.37M | 0.00% | +35,799+39.7% | Added |
| Bank of America Corp | 128,174 | $3.43M | 0.00% | +1,077+0.8% | Added |
| Nordea Investment Management AB | 129,144 | $3.46M | 0.00% | −24,207−15.8% | Reduced |
| Lam Group, Inc. | 130,800 | $3.50M | 2.00% | 00.0% | Unchanged |
| Ameriprise Financial Inc | 133,715 | $3.58M | 0.00% | +3,874+3.0% | Added |
| First Trust Advisors LP | 140,310 | $3.76M | 0.00% | −10,112−6.7% | Reduced |
| JPMorgan Chase & Co | 158,644 | $4.25M | 0.00% | −94,588−37.4% | Reduced |