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 |
|---|---|---|---|---|---|
| Avion Wealth | 24 | $0 | 0.00% | −60−71.4% | Reduced |
| Rothschild Investment LLC | 1 | $20 | 0.00% | −24−96.0% | Reduced |
| Cedar Mountain Advisors, LLC | 1 | $20 | 0.00% | +1 | New |
| Abound Wealth Management | 4 | $79 | 0.00% | 00.0% | Unchanged |
| Gilpin Wealth Management, LLC | 5 | $98 | 0.00% | +3+150.0% | Added |
| Elequin Capital LP | 7 | $137 | 0.00% | −20−74.1% | Reduced |
| Owl Creek Wealth Partners LLC | 10 | $196 | 0.00% | +10 | New |
| Sunbelt Securities, Inc. | 14 | $274 | 0.00% | −8−36.4% | Reduced |
| Torren Management, LLC | 15 | $294 | 0.00% | −747−98.0% | Reduced |
| Trust Co | 15 | $294 | 0.00% | 00.0% | Unchanged |
| Larson Financial Group LLC | 20 | $392 | 0.00% | −748−97.4% | Reduced |
| Legacy Wealth Managment, LLC | 21 | $412 | 0.00% | −38−64.4% | Reduced |
| Sound Income Strategies, LLC | 23 | $466 | 0.00% | +23 | New |
| EverSource Wealth Advisors, LLC | 24 | $470 | 0.00% | −66−73.3% | Reduced |
| Picton Mahoney Asset Management | 24 | $470 | 0.00% | 00.0% | Unchanged |
| Farmers & Merchants Investments Inc | 25 | $490 | 0.00% | 00.0% | Unchanged |
| Brown, Lisle/Cummings, Inc. | 27 | $529 | 0.00% | +27 | New |
| Optiver Holding B.V. | 28 | $549 | 0.00% | −36−56.3% | Reduced |
| Allworth Financial LP | 43 | $843 | 0.00% | −1,443−97.1% | Reduced |
| SBI Securities Co., Ltd. | 44 | $862 | 0.00% | +1+2.3% | Added |
| Bare Financial Services, Inc | 46 | $901 | 0.00% | +46 | New |
| Covestor Ltd | 37 | $1.00K | 0.00% | −22−37.3% | Reduced |
| HighMark Wealth Management LLC | 55 | $1.08K | 0.00% | 00.0% | Unchanged |
| WealthCollab, LLC | 64 | $1.25K | 0.00% | 00.0% | Unchanged |
| IFP Advisors, Inc | 70 | $1.37K | 0.00% | −900−92.8% | Reduced |
| SRS Capital Advisors, Inc. | 60 | $1.69K | 0.00% | +27+81.8% | Added |
| Truvestments Capital LLC | 96 | $1.88K | 0.00% | −58−37.7% | Reduced |
| MCF Advisors LLC | 100 | $1.96K | 0.00% | +100 | New |
| Steward Partners Investment Advisory, LLC | 100 | $1.96K | 0.00% | +100 | New |
| CoreCap Advisors, LLC | 107 | $2.10K | 0.00% | 00.0% | Unchanged |
| Essential Partners LLC | 121 | $2.37K | 0.00% | −79−39.5% | Reduced |
| Rockefeller Capital Management L.P. | 124 | $2.43K | 0.00% | +24+24.0% | Added |
| City State Bank | 150 | $2.94K | 0.00% | 00.0% | Unchanged |
| Capital Advisors, Ltd. LLC | 170 | $3.00K | 0.00% | +159+1,445.5% | Added |
| Parkside Financial Bank & Trust | 156 | $3.06K | 0.00% | −17−9.8% | Reduced |
| Twin Peaks Wealth Advisors, LLC | 177 | $3.47K | 0.00% | +177 | New |
| Umb Bank N A | 180 | $3.53K | 0.00% | −70−28.0% | Reduced |
| Spire Wealth Management | 206 | $4.04K | 0.00% | −7−3.3% | Reduced |
| Bank of New Hampshire | 206 | $4.04K | 0.00% | +206 | New |
| Group One Trading, L.P. | 214 | $4.19K | 0.00% | −1,527−87.7% | Reduced |
| Los Angeles Capital Management LLC | 217 | $4.25K | 0.00% | −19,180−98.9% | Reduced |
| Versant Capital Management, Inc | 218 | $4.27K | 0.00% | −144−39.8% | Reduced |
| Massmutual Trust Co FSB | 224 | $4.39K | 0.00% | −543−70.8% | Reduced |
| Simplex Trading, LLC | 262 | $5.13K | 0.00% | +262 | New |
| Smartleaf Asset Management LLC | 273 | $5.25K | 0.00% | +14+5.4% | Added |
| Jones Financial Companies LLLP | 288 | $5.47K | 0.00% | −243−45.8% | Reduced |
| Pinnacle Wealth Planning Services, Inc. | 283 | $5.54K | 0.00% | −1,332−82.5% | Reduced |
| US Bancorp | 318 | $6.23K | 0.00% | −488−60.5% | Reduced |
| GAMMA Investing LLC | 339 | $6.64K | 0.00% | −1,346−79.9% | Reduced |
| Nisa Investment Advisors, LLC | 361 | $7.07K | 0.00% | −259−41.8% | Reduced |
| MAI Capital Management | 371 | $7.27K | 0.00% | +13+3.6% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 396 | $7.76K | 0.00% | −3,366−89.5% | Reduced |
| Harbor Capital Advisors, Inc. | 391 | $8.00K | 0.00% | +120+44.3% | Added |
| Signaturefd, LLC | 588 | $11.5K | 0.00% | +46+8.5% | Added |
| Public Employees Retirement System of Ohio | 589 | $11.5K | 0.00% | +81+15.9% | Added |
| Parallel Advisors, LLC | 657 | $12.9K | 0.00% | +589+866.2% | Added |
| CWM, LLC | 658 | $12.9K | 0.00% | −1,025−60.9% | Reduced |
| 1620 Investment Advisors, Inc. | 718 | $14.1K | 0.01% | 00.0% | Unchanged |
| Vanguard National Trust Co | 886 | $17.4K | 0.00% | +886 | New |
| GF Fund Management Co. Ltd. | 1,024 | $20.1K | 0.00% | +122+13.5% | Added |
| Quadrant Capital Group LLC | 1,131 | $22.2K | 0.00% | −1,603−58.6% | Reduced |
| Farther Finance Advisors, LLC | 1,136 | $23.0K | 0.00% | −245−17.7% | Reduced |
| FMR LLC | 1,294 | $25.4K | 0.00% | −2,229−63.3% | Reduced |
| Ronald Blue Trust, Inc. | 1,607 | $31.5K | 0.00% | +367+29.6% | Added |
| Hantz Financial Services, Inc. | 2,027 | $40.0K | 0.00% | −2,457−54.8% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 2,366 | $46.4K | 0.00% | +133+6.0% | Added |
| TD Private Client Wealth LLC | 2,379 | $46.6K | 0.00% | −39−1.6% | Reduced |
| CX Institutional | 2,973 | $58.0K | 0.00% | −61,150−95.4% | Reduced |
| Ameritas Investment Partners, Inc. | 3,101 | $60.7K | 0.00% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 3,445 | $67.5K | 0.00% | −284−7.6% | Reduced |
| Royal Bank of Canada | 3,523 | $68.0K | 0.00% | −5,742−62.0% | Reduced |
| Tower Research Capital LLC (TRC) | 3,918 | $76.8K | 0.00% | +2,131+119.3% | Added |
| Basecamp Wealth Advisors LLC | 4,356 | $85.3K | 0.02% | −32−0.7% | Reduced |
| Public Employees Retirement Association of Colorado | 5,265 | $103.0K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 5,449 | $106.7K | 0.00% | −359−6.2% | Reduced |
| Corient IA LLC | 6,670 | $130.7K | 0.12% | −830−11.1% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 7,783 | $152.5K | 0.00% | +279+3.7% | Added |
| KLP Kapitalforvaltning AS | 7,900 | $154.8K | 0.00% | 00.0% | Unchanged |
| Oregon Public Employees Retirement Fund | 8,042 | $157.5K | 0.00% | −100−1.2% | Reduced |
| China Universal Asset Management Co., Ltd. | 8,051 | $157.7K | 0.01% | +563+7.5% | Added |
| Vanguard Investments Australia, Ltd. | 8,567 | $167.8K | 0.00% | +8,567 | New |
| State of Tennessee, Treasury Department | 8,619 | $168.8K | 0.00% | 00.0% | Unchanged |
| Fifth Third Bancorp | 8,750 | $171.4K | 0.00% | +8,241+1,619.1% | Added |
| Teachers Retirement System of the State of Kentucky | 9,053 | $178.0K | 0.00% | 00.0% | Unchanged |
| Arizona State Retirement System | 10,098 | $197.8K | 0.00% | −330−3.2% | Reduced |
| Amalgamated Bank | 10,215 | $200.0K | 0.00% | −204−2.0% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 10,263 | $201.1K | 0.00% | 00.0% | Unchanged |
| JustInvest LLC | 10,290 | $201.6K | 0.00% | −172−1.6% | Reduced |
| Sterling Capital Management LLC | 10,385 | $203.4K | 0.00% | −6,217−37.4% | Reduced |
| Profund Advisors LLC | 10,658 | $208.8K | 0.01% | −463−4.2% | Reduced |
| State Board of Administration of Florida Retirement System | 10,913 | $213.8K | 0.00% | 00.0% | Unchanged |
| Vestcor Inc | 10,949 | $214.0K | 0.01% | −5,434−33.2% | Reduced |
| Magnetar Financial LLC | 11,235 | $220.1K | 0.00% | +11,235 | New |
| PDT Partners, LLC | 11,441 | $224.1K | 0.01% | +11,441 | New |
| Natixis Advisors, L.P. | 11,510 | $225.0K | 0.00% | +11,510 | New |
| Brevan Howard Capital Management LP | 11,614 | $227.5K | 0.00% | −8,851−43.2% | Reduced |
| MML Investors Services, LLC | 12,367 | $242.3K | 0.00% | −2,294−15.6% | Reduced |
| State of New Jersey Common Pension Fund D | 12,564 | $246.1K | 0.00% | +12,564 | New |
| Advisor Group Holdings, Inc. | 13,040 | $255.4K | 0.00% | +186+1.4% | Added |
| Hohimer Wealth Management, LLC | 13,066 | $256.0K | 0.03% | +13,066 | New |