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 2026
Institutional positions in Amphastar Pharmaceuticals, Inc. as of Jun 30, 2026. 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
- 212
- 0 vs. Q1 2026
- Shares held
- 28.3M
- −4.00M (−12.4%) vs. Q1 2026
- Total value
- $572.4M
- −$61.3M (−9.7%) vs. Q1 2026
- New holders
- 32
- 64 more added
- Sold out
- 32
- 77 more reduced
3 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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 2026
Shares, value and share of portfolio for each institution holding Amphastar Pharmaceuticals, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 5,224,934 | $105.4M | 0.00% | −196,409−3.6% | Reduced |
| Dimensional Fund Advisors LP | 2,305,107 | $46.5M | 0.01% | +277,160+13.7% | Added |
| State Street Corp | 1,642,126 | $33.1M | 0.00% | +34,611+2.2% | Added |
| Vanguard Capital Management LLC | 1,481,952 | $29.9M | 0.00% | −61,703−4.0% | Reduced |
| American Century Companies Inc | 1,176,626 | $23.7M | 0.01% | +159,088+15.6% | Added |
| Marshall Wace, LLP | 1,066,322 | $21.5M | 0.02% | +40,682+4.0% | Added |
| Geode Capital Management, LLC | 969,840 | $19.6M | 0.00% | −6,810−0.7% | Reduced |
| Fuller & Thaler Asset Management, Inc. | 949,238 | $19.2M | 0.05% | −445,901−32.0% | Reduced |
| D. E. Shaw & Co., Inc. | 887,048 | $17.9M | 0.01% | +221,506+33.3% | Added |
| Vanguard Portfolio Management LLC | 809,568 | $16.3M | 0.00% | +21,752+2.8% | Added |
| LSV Asset Management | 642,014 | $13.0M | 0.02% | −9,700−1.5% | Reduced |
| Renaissance Technologies LLC | 525,100 | $10.6M | 0.01% | −28,800−5.2% | Reduced |
| Goldman Sachs Group Inc | 505,360 | $10.2M | 0.00% | +175,972+53.4% | Added |
| Systematic Financial Management LP | 437,384 | $8.83M | 0.18% | −15,514−3.4% | Reduced |
| Morgan Stanley | 434,840 | $8.78M | 0.00% | +14,503+3.5% | Added |
| UBS Group AG | 393,110 | $7.93M | 0.00% | −27,153−6.5% | Reduced |
| HRT Financial LP | 387,530 | $7.82M | 0.01% | +331,349+589.8% | Added |
| Denali Advisors LLC | 375,965 | $7.59M | 0.76% | +109,500+41.1% | Added |
| Northern Trust Corp | 370,991 | $7.49M | 0.00% | −1,288−0.3% | Reduced |
| Bridge City Capital, LLC | 338,708 | $6.84M | 1.56% | +3,603+1.1% | Added |
| Charles Schwab Investment Management Inc | 310,178 | $6.26M | 0.00% | −10,861−3.4% | Reduced |
| Bridgeway Capital Management, LLC | 298,954 | $6.03M | 0.11% | −31,503−9.5% | Reduced |
| Royce & Associates LP | 294,758 | $5.95M | 0.05% | −111,417−27.4% | Reduced |
| Two Sigma Investments, LP | 248,115 | $5.01M | 0.00% | +109,967+79.6% | Added |
| First Trust Advisors LP | 246,951 | $4.98M | 0.00% | +96,360+64.0% | Added |
| Pacer Advisors, Inc. | 241,181 | $4.87M | 0.01% | −20,302−7.8% | Reduced |
| Bank of New York Mellon Corp | 232,343 | $4.69M | 0.00% | −10,883−4.5% | Reduced |
| Vanguard Fiduciary Trust Co | 224,478 | $4.53M | 0.00% | −6,566−2.8% | Reduced |
| AQR Capital Management LLC | 208,651 | $4.21M | 0.00% | +129,873+164.9% | Added |
| Principal Financial Group Inc | 204,250 | $4.12M | 0.00% | −4,881−2.3% | Reduced |
| New York State Common Retirement Fund | 181,122 | $3.66M | 0.00% | +32,400+21.8% | Added |
| Jane Street Group, LLC | 178,734 | $3.61M | 0.00% | +86,259+93.3% | Added |
| Empowered Funds, LLC | 162,812 | $3.29M | 0.02% | −18,520−10.2% | Reduced |
| O'Shaughnessy Asset Management, LLC | 159,427 | $3.22M | 0.01% | +55,498+53.4% | Added |
| Invesco Ltd. | 158,064 | $3.19M | 0.00% | −446,710−73.9% | Reduced |
| Victory Capital Management Inc | 149,612 | $3.02M | 0.00% | −100,005−40.1% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 139,402 | $2.81M | 0.00% | 00.0% | Unchanged |
| Bank of America Corp | 136,824 | $2.76M | 0.00% | −37,499−21.5% | Reduced |
| Algert Global LLC | 131,400 | $2.65M | 0.03% | +69,040+110.7% | Added |
| Lam Group, Inc. | 130,800 | $2.64M | 1.31% | 00.0% | Unchanged |
| Nordea Investment Management AB | 126,931 | $2.56M | 0.00% | +3,107+2.5% | Added |
| Bessemer Group Inc | 121,345 | $2.45M | 0.00% | −701−0.6% | Reduced |
| Arrowstreet Capital, Limited Partnership | 116,653 | $2.35M | 0.00% | −208,638−64.1% | Reduced |
| Public Sector Pension Investment Board | 116,648 | $2.35M | 0.01% | −9,926−7.8% | Reduced |
| Nuveen, LLC | 88,397 | $1.78M | 0.00% | +11,802+15.4% | Added |
| Vanguard Global Advisers, LLC | 87,639 | $1.77M | 0.00% | +37,476+74.7% | Added |
| Exchange Traded Concepts, LLC | 87,054 | $1.76M | 0.01% | +4,638+5.6% | Added |
| Rhumbline Advisers | 80,454 | $1.62M | 0.00% | −3,267−3.9% | Reduced |
| Squarepoint Ops LLC | 78,795 | $1.59M | 0.00% | +50,450+178.0% | Added |
| Legal & General Group Plc | 78,281 | $1.58M | 0.00% | −2,635−3.3% | Reduced |
| Assetmark, Inc | 68,590 | $1.38M | 0.00% | +14,852+27.6% | Added |
| Ameriprise Financial Inc | 68,244 | $1.38M | 0.00% | −10,531−13.4% | Reduced |
| Robeco Institutional Asset Management B.V. | 66,407 | $1.34M | 0.00% | 00.0% | Unchanged |
| Swiss National Bank | 64,800 | $1.31M | 0.00% | −7,800−10.7% | Reduced |
| JPMorgan Chase & Co | 57,563 | $1.19M | 0.00% | −47,011−45.0% | Reduced |
| Jump Financial, LLC | 56,781 | $1.15M | 0.01% | +56,781 | New |
| Wells Fargo & Company | 55,913 | $1.13M | 0.00% | +13,894+33.1% | Added |
| Citigroup Inc | 55,779 | $1.13M | 0.00% | +19,875+55.4% | Added |
| Point72 Asset Management, L.P. | 54,964 | $1.11M | 0.00% | +54,964 | New |
| Alliancebernstein L.P. | 56,430 | $1.11M | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 54,663 | $1.10M | 0.00% | −101,414−65.0% | Reduced |
| Creative Planning | 51,444 | $1.04M | 0.00% | +35,041+213.6% | Added |
| Price T Rowe Associates Inc | 51,103 | $1.03M | 0.00% | +6,200+13.8% | Added |
| Voloridge Investment Management, LLC | 50,912 | $1.03M | 0.00% | −120,276−70.3% | Reduced |
| Susquehanna International Group, LLP | 50,565 | $1.02M | 0.00% | +35,964+246.3% | Added |
| Intech Investment Management LLC | 49,839 | $1.01M | 0.01% | +25,632+105.9% | Added |
| Steel Peak Wealth Management LLC | 48,684 | $982.4K | 0.03% | +222+0.5% | Added |
| XTX Topco Ltd | 46,808 | $944.6K | 0.01% | −40,928−46.6% | Reduced |
| UBS Asset Management Americas Inc | 44,062 | $889.2K | 0.00% | −11,313−20.4% | Reduced |
| Polaris Capital Management, LLC | 43,232 | $872.4K | 0.08% | 00.0% | Unchanged |
| California State Teachers Retirement System | 36,151 | $729.5K | 0.00% | +7,852+27.7% | Added |
| Deutsche Bank AG | 35,307 | $712.5K | 0.00% | +2,176+6.6% | Added |
| Prudential Financial Inc | 35,133 | $709.0K | 0.00% | −15,560−30.7% | Reduced |
| Y-Intercept (Hong Kong) Ltd | 34,704 | $700.3K | 0.01% | +34,704 | New |
| Vident Advisory, LLC | 34,221 | $690.6K | 0.01% | +10,977+47.2% | Added |
| Brevan Howard Capital Management LP | 34,201 | $690.2K | 0.01% | +22,587+194.5% | Added |
| Legato Capital Management LLC | 34,135 | $688.8K | 0.06% | 00.0% | Unchanged |
| Janney Montgomery Scott LLC | 33,841 | $683.0K | 0.00% | +20,024+144.9% | Added |
| Segall Bryant & Hamill, LLC | 33,318 | $672.4K | 0.01% | 00.0% | Unchanged |
| SummerHaven Investment Management, LLC | 32,633 | $658.5K | 0.35% | 00.0% | Unchanged |
| Millennium Management LLC | 31,814 | $642.0K | 0.00% | −339,559−91.4% | Reduced |
| SG Americas Securities, LLC | 31,709 | $640.0K | 0.00% | −1,097−3.3% | Reduced |
| Assenagon Asset Management S.A. | 30,432 | $614.1K | 0.00% | +15,216+100.0% | Added |
| Engineers Gate Manager LP | 30,191 | $609.3K | 0.01% | +30,191 | New |
| Illumine Investment Management, LLC | 0 | $594.2K | 0.39% | −28,078−100.0% | Reduced |
| FMR LLC | 28,958 | $584.4K | 0.00% | +27,664+2,137.9% | Added |
| Great West Life Assurance Co | 26,787 | $541.0K | 0.00% | −3,429−11.3% | Reduced |
| State of Alaska, Department of Revenue | 26,433 | $531.0K | 0.01% | −977−3.6% | Reduced |
| Advisor OS, LLC | 25,405 | $512.7K | 0.03% | 00.0% | Unchanged |
| Advisory Research Inc | 25,337 | $511.3K | 0.05% | +20.0% | Added |
| Barclays PLC | 25,217 | $508.9K | 0.00% | +3,934+18.5% | Added |
| Franklin Resources Inc | 24,986 | $504.2K | 0.00% | −114,319−82.1% | Reduced |
| Quadrature Capital Ltd | 24,428 | $493.0K | 0.00% | −6,133−20.1% | Reduced |
| Campbell & CO Investment Adviser LLC | 23,211 | $468.4K | 0.02% | +23,211 | New |
| Vanguard Asset Management, Ltd | 23,052 | $465.2K | 0.00% | 00.0% | Unchanged |
| Thrivent Financial for Lutherans | 22,295 | $450.0K | 0.00% | −1,323−5.6% | Reduced |
| New York State Teachers Retirement System | 21,180 | $427.0K | 0.00% | −645−3.0% | Reduced |
| Quantinno Capital Management LP | 20,827 | $420.3K | 0.00% | +20,827 | New |
| MetLife Investment Management | 20,761 | $419.0K | 0.00% | 00.0% | Unchanged |
| Raymond James Financial Inc | 19,313 | $389.7K | 0.00% | +258+1.4% | Added |