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 2024
Institutional positions in Amphastar Pharmaceuticals, Inc. as of Mar 31, 2024. 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
- 271
- −5 vs. Q4 2023
- Shares held
- 33.6M
- +264.9K (+0.8%) vs. Q4 2023
- Total value
- $1.47B
- −$585.9M (−28.5%) vs. Q4 2023
- New holders
- 48
- 89 more added
- Sold out
- 53
- 98 more reduced
Compare with Q4 2023: 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 2024
Shares, value and share of portfolio for each institution holding Amphastar Pharmaceuticals, Inc.; share changes are against Q4 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock Inc. | 6,079,042 | $266.9M | 0.01% | +41,884+0.7% | Added |
| Vanguard Group Inc | 2,734,040 | $120.1M | 0.00% | −81,556−2.9% | Reduced |
| Federated Hermes, Inc. | 2,077,101 | $91.2M | 0.21% | −1,195,660−36.5% | Reduced |
| Neuberger Berman Group LLC | 1,659,817 | $72.9M | 0.06% | −33,185−2.0% | Reduced |
| State Street Corp | 1,514,249 | $66.5M | 0.00% | +43,112+2.9% | Added |
| Fuller & Thaler Asset Management, Inc. | 1,274,178 | $55.9M | 0.24% | +1,161+0.1% | Added |
| Dimensional Fund Advisors LP | 1,183,830 | $52.0M | 0.01% | −155,312−11.6% | Reduced |
| TD Asset Management Inc | 1,010,593 | $44.4M | 0.04% | +217,034+27.3% | Added |
| Geode Capital Management, LLC | 866,032 | $38.0M | 0.00% | +19,380+2.3% | Added |
| Epoch Investment Partners, Inc. | 798,462 | $35.1M | 0.16% | +205,932+34.8% | Added |
| American Century Companies Inc | 618,644 | $27.2M | 0.02% | +280,954+83.2% | Added |
| Boone Capital Management LLC | 606,688 | $26.6M | 5.39% | +206,688+51.7% | Added |
| Renaissance Technologies LLC | 599,100 | $26.3M | 0.04% | −42,800−6.7% | Reduced |
| Price T Rowe Associates Inc | 584,544 | $25.7M | 0.00% | −2,413−0.4% | Reduced |
| Northern Trust Corp | 560,782 | $24.6M | 0.00% | −14,635−2.5% | Reduced |
| Morgan Stanley | 559,039 | $24.5M | 0.00% | −12,074−2.1% | Reduced |
| Oberweis Asset Management Inc | 417,865 | $18.3M | 1.33% | +77,600+22.8% | Added |
| Invesco Ltd. | 403,040 | $17.7M | 0.00% | +2,151+0.5% | Added |
| Millennium Management LLC | 400,095 | $17.6M | 0.01% | +195,078+95.2% | Added |
| Bessemer Group Inc | 395,941 | $17.4M | 0.03% | +69,968+21.5% | Added |
| Charles Schwab Investment Management Inc | 356,405 | $15.6M | 0.00% | −23,075−6.1% | Reduced |
| Granite Investment Partners, LLC | 352,770 | $15.5M | 0.59% | −12,570−3.4% | Reduced |
| Mesirow Institutional Investment Management, Inc. | 350,294 | $15.4M | 1.37% | +97,463+38.5% | Added |
| Nordea Investment Management AB | 333,014 | $14.8M | 0.02% | +1,209+0.4% | Added |
| Bank of New York Mellon Corp | 294,483 | $12.9M | 0.00% | −18,855−6.0% | Reduced |
| Point72 Asset Management, L.P. | 262,400 | $11.5M | 0.03% | +262,400 | New |
| LSV Asset Management | 224,768 | $9.87M | 0.02% | −92,832−29.2% | Reduced |
| Voloridge Investment Management, LLC | 221,800 | $9.74M | 0.04% | −6,869−3.0% | Reduced |
| Principal Financial Group Inc | 218,574 | $9.60M | 0.01% | +15,621+7.7% | Added |
| Victory Capital Management Inc | 212,686 | $9.34M | 0.01% | −24,788−10.4% | Reduced |
| Goldman Sachs Group Inc | 199,636 | $8.77M | 0.00% | +88,652+79.9% | Added |
| Jacobs Levy Equity Management, Inc | 194,985 | $8.56M | 0.04% | −13,530−6.5% | Reduced |
| Nuveen Asset Management, LLC | 187,491 | $8.23M | 0.00% | −2,356−1.2% | Reduced |
| Janus Henderson Group PLC | 159,198 | $6.99M | 0.00% | −6,000−3.6% | Reduced |
| Assenagon Asset Management S.A. | 154,299 | $6.78M | 0.02% | +154,299 | New |
| JPMorgan Chase & Co | 140,454 | $6.17M | 0.00% | +66,229+89.2% | Added |
| Ameriprise Financial Inc | 134,629 | $5.91M | 0.00% | −4,626−3.3% | Reduced |
| Lam Group, Inc. | 130,800 | $5.74M | 4.68% | 00.0% | Unchanged |
| Frontier Capital Management Co LLC | 125,963 | $5.53M | 0.05% | −1,574−1.2% | Reduced |
| Two Sigma Advisers, LP | 125,900 | $5.53M | 0.01% | −1,500−1.2% | Reduced |
| Qube Research & Technologies Ltd | 125,835 | $5.53M | 0.01% | +70,431+127.1% | Added |
| Bank of America Corp | 125,379 | $5.51M | 0.00% | −90,153−41.8% | Reduced |
| Twinbeech Capital LP | 117,069 | $5.14M | 0.11% | +117,069 | New |
| Silvercrest Asset Management Group LLC | 112,428 | $4.94M | 0.03% | +29,182+35.1% | Added |
| Legal & General Group Plc | 107,327 | $4.71M | 0.00% | +241+0.2% | Added |
| Raymond James & Associates | 98,145 | $4.31M | 0.00% | +5,486+5.9% | Added |
| Mutual of America Capital Management LLC | 97,683 | $4.29M | 0.05% | +9,926+11.3% | Added |
| Two Sigma Investments, LP | 96,804 | $4.25M | 0.01% | +55,029+131.7% | Added |
| Portolan Capital Management, LLC | 91,005 | $4.00M | 0.30% | −57,411−38.7% | Reduced |
| Rhumbline Advisers | 89,193 | $3.92M | 0.00% | −4,547−4.9% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 88,552 | $3.89M | 0.02% | +47,388+115.1% | Added |
| Squarepoint Ops LLC | 82,051 | $3.60M | 0.01% | −1,393−1.7% | Reduced |
| UBS Group AG | 80,452 | $3.53M | 0.00% | +9,366+13.2% | Added |
| Voya Investment Management LLC | 79,644 | $3.50M | 0.00% | −22,309−21.9% | Reduced |
| State of Wisconsin Investment Board | 77,828 | $3.42M | 0.01% | +35,054+82.0% | Added |
| Trexquant Investment LP | 77,725 | $3.41M | 0.07% | +38,766+99.5% | Added |
| Public Sector Pension Investment Board | 76,593 | $3.36M | 0.02% | −950−1.2% | Reduced |
| Swiss National Bank | 75,600 | $3.32M | 0.00% | −1,500−1.9% | Reduced |
| Moody Aldrich Partners LLC | 75,478 | $3.31M | 0.56% | +12,364+19.6% | Added |
| Ellsworth Advisors, LLC | 81,165 | $3.22M | 0.92% | +81,165 | New |
| Barclays PLC | 70,832 | $3.11M | 0.00% | +7,590+12.0% | Added |
| Citadel Advisors LLC | 67,697 | $2.97M | 0.00% | −48,502−41.7% | Reduced |
| First Trust Advisors LP | 67,086 | $2.95M | 0.00% | +20,169+43.0% | Added |
| Allspring Global Investments Holdings, LLC | 64,564 | $2.84M | 0.00% | +24,678+61.9% | Added |
| Hussman Strategic Advisors, Inc. | 63,000 | $2.77M | 0.64% | +63,000 | New |
| BNP Paribas Arbitrage, SA | 61,233 | $2.69M | 0.00% | −36,573−37.4% | Reduced |
| Renaissance Group LLC | 59,402 | $2.61M | 0.10% | +10,983+22.7% | Added |
| Wells Fargo & Company | 57,241 | $2.51M | 0.00% | +20,579+56.1% | Added |
| AQR Capital Management LLC | 57,054 | $2.51M | 0.00% | +44,310+347.7% | Added |
| Cubist Systematic Strategies, LLC | 55,172 | $2.42M | 0.03% | +8,985+19.5% | Added |
| ExodusPoint Capital Management, LP | 54,531 | $2.39M | 0.03% | +42,235+343.5% | Added |
| New York State Common Retirement Fund | 53,989 | $2.37M | 0.00% | +301+0.6% | Added |
| Credit Suisse AG | 51,312 | $2.25M | 0.00% | 00.0% | Unchanged |
| State of New Jersey Common Pension Fund D | 50,610 | $2.22M | 0.01% | +4,650+10.1% | Added |
| Shaker Investments LLC | 49,190 | $2.16M | 0.91% | +112+0.2% | Added |
| Alliancebernstein L.P. | 47,240 | $2.07M | 0.00% | −29,650−38.6% | Reduced |
| Advisor Group Holdings, Inc. | 44,602 | $1.96M | 0.00% | +32,232+260.6% | Added |
| UBS Asset Management Americas Inc | 43,836 | $1.92M | 0.00% | −1,456−3.2% | Reduced |
| Prudential Financial Inc | 41,984 | $1.84M | 0.00% | −1,025−2.4% | Reduced |
| Clark Capital Management Group, Inc. | 40,064 | $1.76M | 0.01% | −22,178−35.6% | Reduced |
| Great West Life Assurance Co | 39,930 | $1.75M | 0.00% | +9,037+29.3% | Added |
| Hillsdale Investment Management Inc. | 39,279 | $1.72M | 0.14% | −57,074−59.2% | Reduced |
| Martingale Asset Management L P | 39,273 | $1.72M | 0.03% | 00.0% | Unchanged |
| Jane Street Group, LLC | 38,860 | $1.71M | 0.00% | −13,119−25.2% | Reduced |
| Buck Wealth Strategies, LLC | 38,318 | $1.68M | 0.58% | +38,318 | New |
| California State Teachers Retirement System | 38,269 | $1.68M | 0.00% | −2,886−7.0% | Reduced |
| Assetmark, Inc | 35,777 | $1.57M | 0.01% | −100.0% | Reduced |
| Citigroup Inc | 34,948 | $1.53M | 0.00% | +4,008+13.0% | Added |
| Bridge City Capital, LLC | 34,773 | $1.53M | 0.56% | +275+0.8% | Added |
| Navellier & Associates Inc | 34,591 | $1.52M | 0.19% | +26,864+347.7% | Added |
| Redwood Investments, LLC | 35,056 | $1.52M | 0.44% | +35,056 | New |
| Russell Investments Group, Ltd. | 34,321 | $1.51M | 0.00% | −29,346−46.1% | Reduced |
| Texas Permanent School Fund | 32,704 | $1.44M | 0.01% | +424+1.3% | Added |
| Thrivent Financial for Lutherans | 32,417 | $1.42M | 0.00% | −880−2.6% | Reduced |
| New York State Teachers Retirement System | 30,855 | $1.35M | 0.00% | +3,514+12.9% | Added |
| SEI Investments Co | 30,630 | $1.34M | 0.00% | −6,653−17.8% | Reduced |
| AXA S.A. | 29,678 | $1.30M | 0.00% | −2,500−7.8% | Reduced |
| Gotham Asset Management, LLC | 28,881 | $1.27M | 0.02% | +17,551+154.9% | Added |
| Advisor OS, LLC | 26,939 | $1.18M | 0.14% | +26,939 | New |
| Franklin Resources Inc | 25,670 | $1.13M | 0.00% | −894−3.4% | Reduced |