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, Q3 2025
Institutional positions in Amphastar Pharmaceuticals, Inc. as of Sep 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
- 243
- 0 vs. Q2 2025
- Shares held
- 32.7M
- +30.4K (+0.1%) vs. Q2 2025
- Total value
- $872.8M
- +$120.8M (+16.1%) vs. Q2 2025
- New holders
- 34
- 82 more added
- Sold out
- 34
- 92 more reduced
2 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Amphastar Pharmaceuticals, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Significant Wealth Partners LLC | 20,579 | $548.4K | 0.27% | +4,401+27.2% | Added |
| Citigroup Inc | 19,815 | $528.1K | 0.00% | −22,405−53.1% | Reduced |
| Los Angeles Capital Management LLC | 18,938 | $504.7K | 0.00% | +18,938 | New |
| Martingale Asset Management L P | 18,521 | $493.6K | 0.01% | −6,021−24.5% | Reduced |
| Vident Advisory, LLC | 18,431 | $491.2K | 0.00% | +1,152+6.7% | Added |
| Cynosure Management, LLC | 17,820 | $474.9K | 0.05% | 00.0% | Unchanged |
| Manufacturers Life Insurance Company, The | 17,762 | $473.4K | 0.00% | −926−5.0% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 17,242 | $459.5K | 0.00% | −3,096−15.2% | Reduced |
| Wellington Management Group LLP | 17,199 | $458.4K | 0.00% | +1,581+10.1% | Added |
| Janus Henderson Group PLC | 16,868 | $449.4K | 0.00% | 00.0% | Unchanged |
| Louisiana State Employees Retirement System | 16,500 | $439.7K | 0.01% | −700−4.1% | Reduced |
| Alps Advisors Inc | 16,250 | $433.1K | 0.00% | +16,250 | New |
| CI Private Wealth, LLC | 15,723 | $419.0K | 0.00% | +15,723 | New |
| Advisory Research Inc | 15,468 | $412.2K | 0.05% | +570+3.8% | Added |
| Gotham Asset Management, LLC | 15,364 | $409.5K | 0.00% | +1,350+9.6% | Added |
| Assenagon Asset Management S.A. | 15,216 | $405.5K | 0.00% | −1,394−8.4% | Reduced |
| Jackson Creek Investment Advisors LLC | 14,743 | $393.0K | 0.11% | +14,743 | New |
| LPL Financial LLC | 14,645 | $390.3K | 0.00% | +14,645 | New |
| PDT Partners, LLC | 14,630 | $389.9K | 0.02% | 00.0% | Unchanged |
| Handelsbanken Fonder AB | 14,400 | $384.0K | 0.00% | 00.0% | Unchanged |
| Virginia Retirement Systems Et Al | 13,562 | $361.4K | 0.00% | +4,800+54.8% | Added |
| Brevan Howard Capital Management LP | 13,489 | $359.5K | 0.01% | −35,431−72.4% | Reduced |
| Janney Montgomery Scott LLC | 13,405 | $357.0K | 0.00% | +13,405 | New |
| Quantinno Capital Management LP | 13,260 | $353.4K | 0.00% | +1,991+17.7% | Added |
| Polaris Capital Management, LLC | 13,100 | $349.1K | 0.02% | −22,000−62.7% | Reduced |
| Susquehanna Fundamental Investments, LLC | 12,568 | $334.9K | 0.01% | −88,985−87.6% | Reduced |
| SEI Investments Co | 11,972 | $319.1K | 0.00% | −700−5.5% | Reduced |
| Hohimer Wealth Management, LLC | 11,972 | $319.1K | 0.04% | +127+1.1% | Added |
| Sterling Capital Management LLC | 11,667 | $310.9K | 0.00% | +1,450+14.2% | Added |
| Cim, LLC | 11,628 | $309.9K | 0.04% | +199+1.7% | Added |
| Segall Bryant & Hamill, LLC | 11,185 | $298.1K | 0.00% | 00.0% | Unchanged |
| Arizona State Retirement System | 11,145 | $297.0K | 0.00% | +55+0.5% | Added |
| JustInvest LLC | 11,004 | $293.3K | 0.00% | −1,620−12.8% | Reduced |
| State Board of Administration of Florida Retirement System | 10,913 | $290.8K | 0.00% | 00.0% | Unchanged |
| Teachers Retirement System of the State of Kentucky | 10,523 | $280.0K | 0.00% | −1,168−10.0% | Reduced |
| Amalgamated Bank | 10,494 | $280.0K | 0.00% | −55−0.5% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 10,263 | $273.5K | 0.00% | +1,975+23.8% | Added |
| Exchange Traded Concepts, LLC | 9,985 | $266.1K | 0.00% | +154+1.6% | Added |
| Franklin Resources Inc | 9,525 | $253.8K | 0.00% | +9,525 | New |
| Comerica Bank | 9,465 | $252.2K | 0.00% | −2,088−18.1% | Reduced |
| Vestcor Inc | 9,383 | $250.0K | 0.01% | 00.0% | Unchanged |
| Teacher Retirement System of Texas | 9,356 | $249.3K | 0.00% | −895−8.7% | Reduced |
| State of Tennessee, Treasury Department | 9,300 | $247.8K | 0.00% | 00.0% | Unchanged |
| Yousif Capital Management, LLC | 9,273 | $247.1K | 0.00% | −1,805−16.3% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 9,118 | $243.0K | 0.00% | −322−3.4% | Reduced |
| Bank of Montreal | 8,968 | $239.0K | 0.00% | −2,822−23.9% | Reduced |
| ProShare Advisors LLC | 8,626 | $229.9K | 0.00% | −1,413−14.1% | Reduced |
| Quest Partners LLC | 8,575 | $228.5K | 0.01% | −20,307−70.3% | Reduced |
| MML Investors Services, LLC | 8,462 | $225.5K | 0.00% | +8,462 | New |
| Profund Advisors LLC | 8,188 | $218.2K | 0.01% | −1,450−15.0% | Reduced |
| China Universal Asset Management Co., Ltd. | 8,150 | $217.2K | 0.02% | −1,318−13.9% | Reduced |
| Oregon Public Employees Retirement Fund | 8,042 | $214.3K | 0.00% | −400−4.7% | Reduced |
| Pathstone Holdings, LLC | 7,984 | $212.8K | 0.00% | +7,984 | New |
| Round Rock Advisors, LLC | 8,580 | $212.1K | 0.03% | +8,580 | New |
| Commonwealth Equity Services, LLC | 7,860 | $209.0K | 0.00% | +7,860 | New |
| Russell Investments Group, Ltd. | 7,665 | $204.3K | 0.00% | +6,830+818.0% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 7,504 | $200.0K | 0.00% | 00.0% | Unchanged |
| KLP Kapitalforvaltning AS | 7,400 | $197.2K | 0.00% | 00.0% | Unchanged |
| FMR LLC | 6,472 | $172.5K | 0.00% | −731−10.1% | Reduced |
| Pacer Advisors, Inc. | 5,996 | $159.8K | 0.00% | −320,102−98.2% | Reduced |
| The PNC Financial Services Group, Inc. | 5,531 | $147.4K | 0.00% | −952−14.7% | Reduced |
| Public Employees Retirement Association of Colorado | 5,265 | $140.0K | 0.00% | 00.0% | Unchanged |
| Wolverine Asset Management LLC | 4,743 | $126.4K | 0.00% | +4,743 | New |
| State of Wyoming | 3,301 | $88.0K | 0.01% | +578+21.2% | Added |
| Hantz Financial Services, Inc. | 3,122 | $83.0K | 0.00% | +1,745+126.7% | Added |
| Ameritas Investment Partners, Inc. | 3,101 | $82.6K | 0.00% | −661−17.6% | Reduced |
| Quadrant Capital Group LLC | 3,076 | $82.0K | 0.00% | +3,076 | New |
| Group One Trading, L.P. | 2,071 | $55.2K | 0.00% | +2,071 | New |
| Oakworth Capital, Inc. | 1,874 | $49.9K | 0.00% | −4,126−68.8% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 1,798 | $47.9K | 0.00% | −23−1.3% | Reduced |
| Ronald Blue Trust, Inc. | 1,768 | $47.1K | 0.00% | −8−0.5% | Reduced |
| Principal Securities, Inc. | 1,604 | $42.7K | 0.00% | +1,586+8,811.1% | Added |
| IFP Advisors, Inc | 1,570 | $41.8K | 0.00% | −465−22.9% | Reduced |
| CWM, LLC | 1,508 | $40.0K | 0.00% | −2,994−66.5% | Reduced |
| Shell Asset Management Co | 1,492 | $40.0K | 0.00% | −2,681−64.2% | Reduced |
| Allworth Financial LP | 1,475 | $39.3K | 0.00% | −70−4.5% | Reduced |
| GAMMA Investing LLC | 1,223 | $32.6K | 0.00% | −939−43.4% | Reduced |
| Quarry LP | 1,183 | $31.5K | 0.01% | +1,183 | New |
| Global Retirement Partners, LLC | 1,024 | $27.3K | 0.00% | +703+219.0% | Added |
| GF Fund Management Co. Ltd. | 1,000 | $26.6K | 0.00% | −230−18.7% | Reduced |
| FNY Investment Advisers, LLC | 1,000 | $26.0K | 0.01% | +1,000 | New |
| Farther Finance Advisors, LLC | 944 | $25.2K | 0.00% | +737+356.0% | Added |
| Massmutual Trust Co FSB | 927 | $24.7K | 0.00% | −335−26.5% | Reduced |
| US Bancorp | 850 | $22.7K | 0.00% | +419+97.2% | Added |
| Tower Research Capital LLC (TRC) | 822 | $21.9K | 0.00% | −2,761−77.1% | Reduced |
| CIBC Private Wealth Group, LLC | 721 | $19.2K | 0.00% | 00.0% | Unchanged |
| 1620 Investment Advisors, Inc. | 682 | $18.2K | 0.01% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 629 | $16.8K | 0.00% | +255+68.2% | Added |
| Richardson Financial Services Inc. | 611 | $16.3K | 0.01% | +611 | New |
| Signaturefd, LLC | 522 | $13.9K | 0.00% | −750−59.0% | Reduced |
| TD Private Client Wealth LLC | 474 | $12.6K | 0.00% | −1,221−72.0% | Reduced |
| Public Employees Retirement System of Ohio | 468 | $12.5K | 0.00% | +54+13.0% | Added |
| Fifth Third Bancorp | 451 | $12.0K | 0.00% | −29−6.0% | Reduced |
| Rockefeller Capital Management L.P. | 423 | $11.3K | 0.00% | +423 | New |
| Larson Financial Group LLC | 409 | $10.9K | 0.00% | +381+1,360.7% | Added |
| Salomon & Ludwin, LLC | 377 | $10.1K | 0.00% | +377 | New |
| Jones Financial Companies LLLP | 367 | $9.85K | 0.00% | 00.0% | Unchanged |
| Versant Capital Management, Inc | 291 | $7.75K | 0.00% | −333−53.4% | Reduced |
| Huntington National Bank | 271 | $7.22K | 0.00% | +18+7.1% | Added |
| Harbour Investments, Inc. | 270 | $7.20K | 0.00% | 00.0% | Unchanged |