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 2026
Institutional positions in Amphastar Pharmaceuticals, Inc. as of Mar 31, 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
- 215
- −16 vs. Q4 2025
- Shares held
- 32.3M
- +1.49M (+4.8%) vs. Q4 2025
- Total value
- $634.0M
- −$192.7M (−23.3%) vs. Q4 2025
- New holders
- 29
- 69 more added
- Sold out
- 45
- 95 more reduced
5 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Amphastar Pharmaceuticals, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Verition Fund Management LLC | 18,597 | $364.3K | 0.00% | +18,597 | New |
| Envestnet Asset Management Inc | 18,268 | $357.9K | 0.00% | −10,555−36.6% | Reduced |
| nVerses Capital, LLC | 17,685 | $346.4K | 0.31% | +17,685 | New |
| State of Wisconsin Investment Board | 17,388 | $340.6K | 0.00% | −118−0.7% | Reduced |
| Janus Henderson Group PLC | 16,868 | $330.7K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global ETFs Holdings Ltd. | 16,846 | $330.0K | 0.00% | −33−0.2% | Reduced |
| Creative Planning | 16,403 | $321.3K | 0.00% | −35,261−68.3% | Reduced |
| Canada Pension Plan Investment Board | 16,300 | $319.3K | 0.00% | −13,500−45.3% | Reduced |
| Manufacturers Life Insurance Company, The | 15,879 | $311.1K | 0.00% | −523−3.2% | Reduced |
| Louisiana State Employees Retirement System | 15,700 | $307.6K | 0.01% | −500−3.1% | Reduced |
| Assenagon Asset Management S.A. | 15,216 | $298.1K | 0.00% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 14,601 | $286.0K | 0.00% | +6,468+79.5% | Added |
| Federated Hermes, Inc. | 14,079 | $275.8K | 0.00% | −9,458−40.2% | Reduced |
| Janney Montgomery Scott LLC | 13,817 | $271.0K | 0.00% | −413−2.9% | Reduced |
| Quantedge Capital Pte Ltd | 13,500 | $264.5K | 0.14% | −78,200−85.3% | Reduced |
| Hohimer Wealth Management, LLC | 13,066 | $256.0K | 0.03% | +13,066 | New |
| Advisor Group Holdings, Inc. | 13,040 | $255.4K | 0.00% | +186+1.4% | Added |
| State of New Jersey Common Pension Fund D | 12,564 | $246.1K | 0.00% | +12,564 | New |
| MML Investors Services, LLC | 12,367 | $242.3K | 0.00% | −2,294−15.6% | Reduced |
| Brevan Howard Capital Management LP | 11,614 | $227.5K | 0.00% | −8,851−43.2% | Reduced |
| Natixis Advisors, L.P. | 11,510 | $225.0K | 0.00% | +11,510 | New |
| PDT Partners, LLC | 11,441 | $224.1K | 0.01% | +11,441 | New |
| Magnetar Financial LLC | 11,235 | $220.1K | 0.00% | +11,235 | New |
| Vestcor Inc | 10,949 | $214.0K | 0.01% | −5,434−33.2% | Reduced |
| State Board of Administration of Florida Retirement System | 10,913 | $213.8K | 0.00% | 00.0% | Unchanged |
| Profund Advisors LLC | 10,658 | $208.8K | 0.01% | −463−4.2% | Reduced |
| Sterling Capital Management LLC | 10,385 | $203.4K | 0.00% | −6,217−37.4% | Reduced |
| JustInvest LLC | 10,290 | $201.6K | 0.00% | −172−1.6% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 10,263 | $201.1K | 0.00% | 00.0% | Unchanged |
| Amalgamated Bank | 10,215 | $200.0K | 0.00% | −204−2.0% | Reduced |
| Arizona State Retirement System | 10,098 | $197.8K | 0.00% | −330−3.2% | Reduced |
| Teachers Retirement System of the State of Kentucky | 9,053 | $178.0K | 0.00% | 00.0% | Unchanged |
| Fifth Third Bancorp | 8,750 | $171.4K | 0.00% | +8,241+1,619.1% | Added |
| State of Tennessee, Treasury Department | 8,619 | $168.8K | 0.00% | 00.0% | Unchanged |
| Vanguard Investments Australia, Ltd. | 8,567 | $167.8K | 0.00% | +8,567 | New |
| China Universal Asset Management Co., Ltd. | 8,051 | $157.7K | 0.01% | +563+7.5% | Added |
| Oregon Public Employees Retirement Fund | 8,042 | $157.5K | 0.00% | −100−1.2% | Reduced |
| KLP Kapitalforvaltning AS | 7,900 | $154.8K | 0.00% | 00.0% | Unchanged |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 7,783 | $152.5K | 0.00% | +279+3.7% | Added |
| Corient IA LLC | 6,670 | $130.7K | 0.12% | −830−11.1% | Reduced |
| The PNC Financial Services Group, Inc. | 5,449 | $106.7K | 0.00% | −359−6.2% | Reduced |
| Public Employees Retirement Association of Colorado | 5,265 | $103.0K | 0.00% | 00.0% | Unchanged |
| Basecamp Wealth Advisors LLC | 4,356 | $85.3K | 0.02% | −32−0.7% | Reduced |
| Tower Research Capital LLC (TRC) | 3,918 | $76.8K | 0.00% | +2,131+119.3% | Added |
| Royal Bank of Canada | 3,523 | $68.0K | 0.00% | −5,742−62.0% | Reduced |
| Russell Investments Group, Ltd. | 3,445 | $67.5K | 0.00% | −284−7.6% | Reduced |
| Ameritas Investment Partners, Inc. | 3,101 | $60.7K | 0.00% | 00.0% | Unchanged |
| CX Institutional | 2,973 | $58.0K | 0.00% | −61,150−95.4% | Reduced |
| TD Private Client Wealth LLC | 2,379 | $46.6K | 0.00% | −39−1.6% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 2,366 | $46.4K | 0.00% | +133+6.0% | Added |
| Hantz Financial Services, Inc. | 2,027 | $40.0K | 0.00% | −2,457−54.8% | Reduced |
| Ronald Blue Trust, Inc. | 1,607 | $31.5K | 0.00% | +367+29.6% | Added |
| FMR LLC | 1,294 | $25.4K | 0.00% | −2,229−63.3% | Reduced |
| Farther Finance Advisors, LLC | 1,136 | $23.0K | 0.00% | −245−17.7% | Reduced |
| Quadrant Capital Group LLC | 1,131 | $22.2K | 0.00% | −1,603−58.6% | Reduced |
| GF Fund Management Co. Ltd. | 1,024 | $20.1K | 0.00% | +122+13.5% | Added |
| Vanguard National Trust Co | 886 | $17.4K | 0.00% | +886 | New |
| 1620 Investment Advisors, Inc. | 718 | $14.1K | 0.01% | 00.0% | Unchanged |
| CWM, LLC | 658 | $12.9K | 0.00% | −1,025−60.9% | Reduced |
| Parallel Advisors, LLC | 657 | $12.9K | 0.00% | +589+866.2% | Added |
| Public Employees Retirement System of Ohio | 589 | $11.5K | 0.00% | +81+15.9% | Added |
| Signaturefd, LLC | 588 | $11.5K | 0.00% | +46+8.5% | Added |
| Harbor Capital Advisors, Inc. | 391 | $8.00K | 0.00% | +120+44.3% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 396 | $7.76K | 0.00% | −3,366−89.5% | Reduced |
| MAI Capital Management | 371 | $7.27K | 0.00% | +13+3.6% | Added |
| Nisa Investment Advisors, LLC | 361 | $7.07K | 0.00% | −259−41.8% | Reduced |
| GAMMA Investing LLC | 339 | $6.64K | 0.00% | −1,346−79.9% | Reduced |
| US Bancorp | 318 | $6.23K | 0.00% | −488−60.5% | Reduced |
| Pinnacle Wealth Planning Services, Inc. | 283 | $5.54K | 0.00% | −1,332−82.5% | Reduced |
| Jones Financial Companies LLLP | 288 | $5.47K | 0.00% | −243−45.8% | Reduced |
| Smartleaf Asset Management LLC | 273 | $5.25K | 0.00% | +14+5.4% | Added |
| Simplex Trading, LLC | 262 | $5.13K | 0.00% | +262 | New |
| Massmutual Trust Co FSB | 224 | $4.39K | 0.00% | −543−70.8% | Reduced |
| Versant Capital Management, Inc | 218 | $4.27K | 0.00% | −144−39.8% | Reduced |
| Los Angeles Capital Management LLC | 217 | $4.25K | 0.00% | −19,180−98.9% | Reduced |
| Group One Trading, L.P. | 214 | $4.19K | 0.00% | −1,527−87.7% | Reduced |
| Spire Wealth Management | 206 | $4.04K | 0.00% | −7−3.3% | Reduced |
| Bank of New Hampshire | 206 | $4.04K | 0.00% | +206 | New |
| Umb Bank N A | 180 | $3.53K | 0.00% | −70−28.0% | Reduced |
| Twin Peaks Wealth Advisors, LLC | 177 | $3.47K | 0.00% | +177 | New |
| Parkside Financial Bank & Trust | 156 | $3.06K | 0.00% | −17−9.8% | Reduced |
| Capital Advisors, Ltd. LLC | 170 | $3.00K | 0.00% | +159+1,445.5% | Added |
| City State Bank | 150 | $2.94K | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 124 | $2.43K | 0.00% | +24+24.0% | Added |
| Essential Partners LLC | 121 | $2.37K | 0.00% | −79−39.5% | Reduced |
| CoreCap Advisors, LLC | 107 | $2.10K | 0.00% | 00.0% | Unchanged |
| MCF Advisors LLC | 100 | $1.96K | 0.00% | +100 | New |
| Steward Partners Investment Advisory, LLC | 100 | $1.96K | 0.00% | +100 | New |
| Truvestments Capital LLC | 96 | $1.88K | 0.00% | −58−37.7% | Reduced |
| SRS Capital Advisors, Inc. | 60 | $1.69K | 0.00% | +27+81.8% | Added |
| IFP Advisors, Inc | 70 | $1.37K | 0.00% | −900−92.8% | Reduced |
| WealthCollab, LLC | 64 | $1.25K | 0.00% | 00.0% | Unchanged |
| HighMark Wealth Management LLC | 55 | $1.08K | 0.00% | 00.0% | Unchanged |
| Covestor Ltd | 37 | $1.00K | 0.00% | −22−37.3% | Reduced |
| Bare Financial Services, Inc | 46 | $901 | 0.00% | +46 | New |
| SBI Securities Co., Ltd. | 44 | $862 | 0.00% | +1+2.3% | Added |
| Allworth Financial LP | 43 | $843 | 0.00% | −1,443−97.1% | Reduced |
| Optiver Holding B.V. | 28 | $549 | 0.00% | −36−56.3% | Reduced |
| Brown, Lisle/Cummings, Inc. | 27 | $529 | 0.00% | +27 | New |
| Farmers & Merchants Investments Inc | 25 | $490 | 0.00% | 00.0% | Unchanged |