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 |
|---|---|---|---|---|---|
| Bridge City Capital, LLC | 115,855 | $3.36M | 1.01% | +45,760+65.3% | Added |
| Public Sector Pension Investment Board | 118,885 | $3.45M | 0.01% | +25,455+27.2% | Added |
| Frontier Capital Management Co LLC | 119,628 | $3.47M | 0.04% | −3,732−3.0% | Reduced |
| Janus Henderson Group PLC | 124,402 | $3.54M | 0.00% | −64,945−34.3% | Reduced |
| Lam Group, Inc. | 130,800 | $3.79M | 2.79% | 00.0% | Unchanged |
| Nordea Investment Management AB | 150,932 | $4.32M | 0.00% | −128,782−46.0% | Reduced |
| Ameriprise Financial Inc | 155,146 | $4.50M | 0.00% | +9,131+6.3% | Added |
| Citadel Advisors LLC | 155,979 | $4.52M | 0.00% | +15,566+11.1% | Added |
| Balyasny Asset Management LLC | 162,138 | $4.70M | 0.01% | +162,138 | New |
| Silvercrest Asset Management Group LLC | 165,856 | $4.81M | 0.03% | −958−0.6% | Reduced |
| Principal Financial Group Inc | 212,647 | $6.16M | 0.00% | +4,669+2.2% | Added |
| Voloridge Investment Management, LLC | 216,002 | $6.26M | 0.02% | +72,566+50.6% | Added |
| Royce & Associates LP | 247,858 | $7.19M | 0.08% | +238,956+2,684.3% | Added |
| Qube Research & Technologies Ltd | 258,981 | $7.51M | 0.01% | +143,689+124.6% | Added |
| Bank of New York Mellon Corp | 266,075 | $7.71M | 0.00% | −19,788−6.9% | Reduced |
| Hotchkis & Wiley Capital Management LLC | 270,150 | $7.83M | 0.03% | +32,630+13.7% | Added |
| American Century Companies Inc | 307,993 | $8.93M | 0.01% | −164,024−34.7% | Reduced |
| Charles Schwab Investment Management Inc | 326,226 | $9.46M | 0.00% | −21,286−6.1% | Reduced |
| Systematic Financial Management LP | 326,546 | $9.47M | 0.27% | +80,198+32.6% | Added |
| ExodusPoint Capital Management, LP | 343,292 | $9.95M | 0.13% | +343,292 | New |
| Invesco Ltd. | 359,143 | $10.4M | 0.00% | +60,279+20.2% | Added |
| Granite Investment Partners, LLC | 375,778 | $10.9M | 0.55% | −20,924−5.3% | Reduced |
| Goldman Sachs Group Inc | 406,712 | $11.8M | 0.00% | −21,123−4.9% | Reduced |
| Boston Partners | 423,070 | $11.9M | 0.01% | −3,566−0.8% | Reduced |
| Pacer Advisors, Inc. | 479,390 | $13.9M | 0.03% | −870,978−64.5% | Reduced |
| Renaissance Technologies LLC | 495,000 | $14.4M | 0.02% | −30,500−5.8% | Reduced |
| Morgan Stanley | 522,112 | $15.1M | 0.00% | −109,962−17.4% | Reduced |
| Price T Rowe Associates Inc | 541,221 | $15.7M | 0.00% | −25,435−4.5% | Reduced |
| Federated Hermes, Inc. | 585,115 | $17.0M | 0.04% | −238,372−28.9% | Reduced |
| Northern Trust Corp | 594,437 | $17.2M | 0.00% | −18,733−3.1% | Reduced |
| Millennium Management LLC | 868,551 | $25.2M | 0.02% | +611,995+238.5% | Added |
| Geode Capital Management, LLC | 955,076 | $27.7M | 0.00% | +38,995+4.3% | Added |
| Marshall Wace, LLP | 1,031,722 | $29.9M | 0.04% | +423,016+69.5% | Added |
| Boston Trust Walden Corp | 1,215,624 | $35.2M | 0.26% | +236,704+24.2% | Added |
| Epoch Investment Partners, Inc. | 1,261,307 | $36.6M | 0.19% | +160,034+14.5% | Added |
| Fuller & Thaler Asset Management, Inc. | 1,263,598 | $36.6M | 0.14% | +130,672+11.5% | Added |
| Dimensional Fund Advisors LP | 1,356,360 | $39.3M | 0.01% | +157,770+13.2% | Added |
| State Street Corp | 1,604,614 | $46.5M | 0.00% | +8,504+0.5% | Added |
| TD Asset Management Inc | 2,212,142 | $64.1M | 0.06% | +371,856+20.2% | Added |
| Vanguard Group Inc | 2,422,904 | $70.2M | 0.00% | −291,724−10.7% | Reduced |
| BlackRock, Inc. | 6,147,658 | $178.2M | 0.00% | +29,836+0.5% | Added |
| Proequities, Inc. | 0 | $0 | 0.00% | −1,063−100.0% | Sold out |
| Neuberger Berman Group LLC | 0 | $0 | 0.00% | −1,374,125−100.0% | Sold out |
| Oberweis Asset Management Inc | 0 | $0 | 0.00% | −184,595−100.0% | Sold out |
| Clark Capital Management Group, Inc. | 0 | $0 | 0.00% | −148,075−100.0% | Sold out |
| Portolan Capital Management, LLC | 0 | $0 | 0.00% | −131,123−100.0% | Sold out |
| Renaissance Group LLC | 0 | $0 | 0.00% | −99,572−100.0% | Sold out |
| Mutual of America Capital Management LLC | 0 | $0 | 0.00% | −92,251−100.0% | Sold out |
| PDT Partners, LLC | 0 | $0 | 0.00% | −90,484−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −42,614−100.0% | Sold out |
| Chatham Capital Group, Inc. | 0 | $0 | 0.00% | −27,295−100.0% | Sold out |
| Glenmede Trust Co NA | 0 | $0 | 0.00% | −24,743−100.0% | Sold out |
| Redwood Investments, LLC | 0 | $0 | 0.00% | −21,459−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −19,150−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −18,526−100.0% | Sold out |
| Invst, LLC | 0 | $0 | 0.00% | −11,346−100.0% | Sold out |
| D.A. Davidson & Co. | 0 | $0 | 0.00% | −11,244−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −9,803−100.0% | Sold out |
| Sanctuary Advisors, LLC | 0 | $0 | 0.00% | −9,983−100.0% | Sold out |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −9,200−100.0% | Sold out |
| HSBC Holdings PLC | 0 | $0 | 0.00% | −8,991−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −8,666−100.0% | Sold out |
| BCJ Capital Management, LLC | 0 | $0 | 0.00% | −7,638−100.0% | Sold out |
| Alps Advisors Inc | 0 | $0 | 0.00% | −7,395−100.0% | Sold out |
| Aquatic Capital Management LLC | 0 | $0 | 0.00% | −7,036−100.0% | Sold out |
| Allianz Asset Management GmbH | 0 | $0 | 0.00% | −6,700−100.0% | Sold out |
| Axq Capital, LP | 0 | $0 | 0.00% | −6,621−100.0% | Sold out |
| Yorktown Management & Research Co Inc | 0 | $0 | 0.00% | −6,600−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −6,338−100.0% | Sold out |
| Virtus Investment Advisers, Inc. | 0 | $0 | 0.00% | −6,109−100.0% | Sold out |
| Truist Financial Corp | 0 | $0 | 0.00% | −5,661−100.0% | Sold out |
| Dakota Wealth Management | 0 | $0 | 0.00% | −5,486−100.0% | Sold out |
| Cornercap Investment Counsel Inc | 0 | $0 | 0.00% | −5,421−100.0% | Sold out |
| Alan B. Lancz & Associates, Inc. | 0 | $0 | 0.00% | −5,400−100.0% | Sold out |
| Mendota Financial Group, LLC | 0 | $0 | 0.00% | −3,426−100.0% | Sold out |
| Aster Capital Management (DIFC) Ltd | 0 | $0 | 0.00% | −2,869−100.0% | Sold out |
| Lazard Asset Management LLC | 0 | $0 | 0.00% | −1,630−100.0% | Sold out |
| Asset Management One Co.,Ltd. | 0 | $0 | 0.00% | −1,297−100.0% | Sold out |
| NVWM, LLC | 0 | $0 | 0.00% | −627−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −548−100.0% | Sold out |
| Advisors Asset Management, Inc. | 0 | $0 | 0.00% | −399−100.0% | Sold out |
| Richardson Financial Services Inc. | 0 | $0 | 0.00% | −246−100.0% | Sold out |
| Silicon Valley Capital Partners | 0 | $0 | 0.00% | −229−100.0% | Sold out |
| Clearstead Advisors, LLC | 0 | $0 | 0.00% | −108−100.0% | Sold out |
| LGT Financial Advisors LLC | 0 | $0 | 0.00% | −83−100.0% | Sold out |
| Eagle Bay Advisors LLC | 0 | $0 | 0.00% | −82−100.0% | Sold out |
| Park Square Financial Group, LLC | 0 | $0 | 0.00% | −64−100.0% | Sold out |
| Private Trust Co NA | 0 | $0 | 0.00% | −48−100.0% | Sold out |
| Cornerstone Planning Group LLC | 0 | $0 | 0.00% | −13−100.0% | Sold out |
| JFS Wealth Advisors, LLC | 0 | $0 | 0.00% | −3−100.0% | Sold out |
| SJS Investment Consulting Inc. | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Mesirow Institutional Investment Management, Inc. | – | – | – | – | Not filed |
| Nuveen Asset Management, LLC | – | – | – | – | Not filed |
| Virtus Fund Advisers, LLC | – | – | – | – | Not filed |
| Global Retirement Partners, LLC | – | – | – | – | Not filed |
| Legacy Investment Solutions, LLC | – | – | – | – | Not filed |