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, Q4 2025
Institutional positions in Amphastar Pharmaceuticals, Inc. as of Dec 31, 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
- 236
- −6 vs. Q3 2025
- Shares held
- 33.6M
- +837.1K (+2.6%) vs. Q3 2025
- Total value
- $899.7M
- +$27.0M (+3.1%) vs. Q3 2025
- New holders
- 26
- 94 more added
- Sold out
- 32
- 87 more reduced
1 institution that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Amphastar Pharmaceuticals, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Illinois Municipal Retirement Fund | 20,913 | $560.0K | 0.01% | +166+0.8% | Added |
| Round Rock Advisors, LLC | 20,477 | $548.4K | 0.08% | +11,897+138.7% | Added |
| Brevan Howard Capital Management LP | 20,465 | $548.1K | 0.01% | +6,976+51.7% | Added |
| Vident Advisory, LLC | 20,409 | $546.6K | 0.01% | +1,978+10.7% | Added |
| LPL Financial LLC | 19,844 | $531.4K | 0.00% | +5,199+35.5% | Added |
| Los Angeles Capital Management LLC | 19,397 | $478.3K | 0.00% | +459+2.4% | Added |
| State of Wisconsin Investment Board | 17,506 | $468.8K | 0.00% | −3,828−17.9% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 16,879 | $452.0K | 0.00% | −363−2.1% | Reduced |
| Janus Henderson Group PLC | 16,868 | $451.8K | 0.00% | 00.0% | Unchanged |
| Sterling Capital Management LLC | 16,602 | $444.6K | 0.01% | +4,935+42.3% | Added |
| Alps Advisors Inc | 16,431 | $440.0K | 0.00% | +181+1.1% | Added |
| Manufacturers Life Insurance Company, The | 16,402 | $439.2K | 0.00% | −1,360−7.7% | Reduced |
| Vestcor Inc | 16,383 | $439.0K | 0.01% | +7,000+74.6% | Added |
| Louisiana State Employees Retirement System | 16,200 | $433.8K | 0.01% | −300−1.8% | Reduced |
| Quantinno Capital Management LP | 15,568 | $416.9K | 0.00% | +2,308+17.4% | Added |
| Assenagon Asset Management S.A. | 15,216 | $407.5K | 0.00% | 00.0% | Unchanged |
| Advisory Research Inc | 15,161 | $406.0K | 0.05% | −307−2.0% | Reduced |
| ExodusPoint Capital Management, LP | 14,929 | $399.8K | 0.00% | +14,929 | New |
| Squarepoint Ops LLC | 14,860 | $398.0K | 0.00% | −34,450−69.9% | Reduced |
| Deerfield Management Company, L.P. (Series C) | 14,852 | $397.7K | 0.01% | +14,852 | New |
| MML Investors Services, LLC | 14,661 | $392.6K | 0.00% | +6,199+73.3% | Added |
| SEI Investments Co | 14,649 | $392.3K | 0.00% | +2,677+22.4% | Added |
| Quantbot Technologies LP | 14,515 | $388.7K | 0.01% | −15,248−51.2% | Reduced |
| Janney Montgomery Scott LLC | 14,230 | $381.0K | 0.00% | +825+6.2% | Added |
| Man Group plc | 14,151 | $379.0K | 0.00% | −18,234−56.3% | Reduced |
| Advisor Group Holdings, Inc. | 12,854 | $344.2K | 0.00% | −18,760−59.3% | Reduced |
| Martingale Asset Management L P | 12,400 | $332.1K | 0.01% | −6,121−33.0% | Reduced |
| Virginia Retirement Systems Et Al | 12,362 | $331.1K | 0.00% | −1,200−8.8% | Reduced |
| Cim, LLC | 11,342 | $303.7K | 0.04% | −286−2.5% | Reduced |
| Segall Bryant & Hamill, LLC | 11,185 | $299.5K | 0.00% | 00.0% | Unchanged |
| Profund Advisors LLC | 11,121 | $297.8K | 0.01% | +2,933+35.8% | Added |
| State Board of Administration of Florida Retirement System | 10,913 | $292.3K | 0.00% | 00.0% | Unchanged |
| JustInvest LLC | 10,462 | $280.2K | 0.00% | −542−4.9% | Reduced |
| Arizona State Retirement System | 10,428 | $279.3K | 0.00% | −717−6.4% | Reduced |
| Amalgamated Bank | 10,419 | $279.0K | 0.00% | −75−0.7% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 10,263 | $274.8K | 0.00% | 00.0% | Unchanged |
| Significant Wealth Partners LLC | 9,624 | $257.7K | 0.29% | −10,955−53.2% | Reduced |
| Exchange Traded Concepts, LLC | 9,418 | $252.2K | 0.00% | −567−5.7% | Reduced |
| Acadian Asset Management LLC | 9,332 | $249.0K | 0.00% | −35,017−79.0% | Reduced |
| Royal Bank of Canada | 9,265 | $248.0K | 0.00% | −40,406−81.3% | Reduced |
| Ameritas Advisory Services, LLC | 9,186 | $246.0K | 0.01% | +9,186 | New |
| ProShare Advisors LLC | 9,083 | $243.2K | 0.00% | +457+5.3% | Added |
| Teachers Retirement System of the State of Kentucky | 9,053 | $242.0K | 0.00% | −1,470−14.0% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 8,760 | $234.6K | 0.00% | −358−3.9% | Reduced |
| Commonwealth Equity Services, LLC | 8,742 | $234.1K | 0.00% | +882+11.2% | Added |
| State of Tennessee, Treasury Department | 8,619 | $228.3K | 0.00% | −681−7.3% | Reduced |
| Comerica Bank | 8,488 | $227.3K | 0.00% | −977−10.3% | Reduced |
| Yousif Capital Management, LLC | 8,721 | $226.3K | 0.00% | −552−6.0% | Reduced |
| Oregon Public Employees Retirement Fund | 8,142 | $218.0K | 0.00% | +100+1.2% | Added |
| Susquehanna International Group, LLP | 8,133 | $217.8K | 0.00% | +8,133 | New |
| KLP Kapitalforvaltning AS | 7,900 | $211.6K | 0.00% | +500+6.8% | Added |
| CI Private Wealth, LLC | 7,839 | $209.9K | 0.00% | −7,884−50.1% | Reduced |
| Jump Financial, LLC | 7,800 | $208.9K | 0.00% | +7,800 | New |
| Quest Partners LLC | 7,720 | $206.7K | 0.01% | −855−10.0% | Reduced |
| Rafferty Asset Management, LLC | 7,682 | $205.7K | 0.00% | +7,682 | New |
| State of Wyoming | 7,561 | $202.5K | 0.02% | +4,260+129.1% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 7,504 | $201.0K | 0.00% | 00.0% | Unchanged |
| Corient IA LLC | 7,500 | $200.8K | 0.19% | +7,500 | New |
| China Universal Asset Management Co., Ltd. | 7,488 | $200.5K | 0.02% | −662−8.1% | Reduced |
| The PNC Financial Services Group, Inc. | 5,808 | $155.5K | 0.00% | +277+5.0% | Added |
| Public Employees Retirement Association of Colorado | 5,265 | $141.0K | 0.00% | 00.0% | Unchanged |
| Hantz Financial Services, Inc. | 4,484 | $120.0K | 0.00% | +1,362+43.6% | Added |
| Basecamp Wealth Advisors LLC | 4,388 | $117.5K | 0.03% | +4,388 | New |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 3,762 | $101.0K | 0.00% | +3,582+1,990.0% | Added |
| Russell Investments Group, Ltd. | 3,729 | $99.9K | 0.00% | −3,936−51.4% | Reduced |
| FMR LLC | 3,523 | $94.3K | 0.00% | −2,949−45.6% | Reduced |
| Ameritas Investment Partners, Inc. | 3,101 | $83.0K | 0.00% | 00.0% | Unchanged |
| Quadrant Capital Group LLC | 2,734 | $73.2K | 0.00% | −342−11.1% | Reduced |
| TD Private Client Wealth LLC | 2,418 | $64.8K | 0.00% | +1,944+410.1% | Added |
| Mirae Asset Global Investments Co., Ltd. | 2,233 | $59.8K | 0.00% | +435+24.2% | Added |
| Tower Research Capital LLC (TRC) | 1,787 | $47.9K | 0.00% | +965+117.4% | Added |
| Group One Trading, L.P. | 1,741 | $46.6K | 0.00% | −330−15.9% | Reduced |
| GAMMA Investing LLC | 1,685 | $45.1K | 0.00% | +462+37.8% | Added |
| CWM, LLC | 1,683 | $45.0K | 0.00% | +175+11.6% | Added |
| Pinnacle Wealth Planning Services, Inc. | 1,615 | $43.3K | 0.00% | +1,615 | New |
| Allworth Financial LP | 1,486 | $39.8K | 0.00% | +11+0.7% | Added |
| Farther Finance Advisors, LLC | 1,381 | $37.0K | 0.00% | +437+46.3% | Added |
| Ronald Blue Trust, Inc. | 1,240 | $33.2K | 0.00% | −528−29.9% | Reduced |
| Global Retirement Partners, LLC | 1,174 | $31.4K | 0.00% | +150+14.6% | Added |
| IFP Advisors, Inc | 970 | $26.0K | 0.00% | −600−38.2% | Reduced |
| Lazard Asset Management LLC | 912 | $24.4K | 0.00% | +912 | New |
| GF Fund Management Co. Ltd. | 902 | $24.2K | 0.00% | −98−9.8% | Reduced |
| CIBC Private Wealth Group, LLC | 878 | $23.5K | 0.00% | +157+21.8% | Added |
| Richardson Financial Services Inc. | 819 | $21.9K | 0.01% | +208+34.0% | Added |
| US Bancorp | 806 | $21.6K | 0.00% | −44−5.2% | Reduced |
| Larson Financial Group LLC | 768 | $20.6K | 0.00% | +359+87.8% | Added |
| Massmutual Trust Co FSB | 767 | $20.5K | 0.00% | −160−17.3% | Reduced |
| Torren Management, LLC | 762 | $20.4K | 0.01% | +762 | New |
| 1620 Investment Advisors, Inc. | 718 | $19.2K | 0.01% | +36+5.3% | Added |
| Nisa Investment Advisors, LLC | 620 | $16.6K | 0.00% | −9−1.4% | Reduced |
| Signaturefd, LLC | 542 | $14.5K | 0.00% | +20+3.8% | Added |
| Jones Financial Companies LLLP | 531 | $14.2K | 0.00% | +164+44.7% | Added |
| Fifth Third Bancorp | 509 | $13.6K | 0.00% | +58+12.9% | Added |
| Public Employees Retirement System of Ohio | 508 | $13.6K | 0.00% | +40+8.5% | Added |
| Versant Capital Management, Inc | 362 | $9.69K | 0.00% | +71+24.4% | Added |
| MAI Capital Management | 358 | $9.59K | 0.00% | +300+517.2% | Added |
| Harbor Capital Advisors, Inc. | 271 | $7.00K | 0.00% | −5−1.8% | Reduced |
| Smartleaf Asset Management LLC | 259 | $6.99K | 0.00% | +52+25.1% | Added |
| Umb Bank N A | 250 | $6.70K | 0.00% | +3+1.2% | Added |
| Salomon & Ludwin, LLC | 229 | $6.12K | 0.00% | −148−39.3% | Reduced |