Amphastar PharmaceuticalsAMPH
13F holders, Q4 2025 (December 31)236holders −7
22new positions
32sold out
6famous investors
$26.79avg. 13F price*
At the end of Q4 2025, 236 institutions reported holding Amphastar Pharmaceuticals Inc. (AMPH) in their 13F filings, down 7 from Q3 2025. 22 opened new positions and 32 sold out. The largest holders were BlackRock, Inc. ($146.3M), Vanguard Group Inc. ($69.8M) and TD Asset Management Inc ($52.6M). 6 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Amphastar Pharmaceuticals Inc.
- CUSIP
- 03209R103
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 22 | $15.4M |
| Exits | 32 | $10.7M |
All 13F filers, Q3 2025 → Q4 2025: 3,290,164 shares bought and 2,458,254 shares sold, net +831,910 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 236 holders
| BlackRock, Inc. | 0.00% | Reduce -0.4% | 5,462,015 | $146.3M |
| Vanguard Group Inc. | 0.00% | Reduce -0.9% | 2,608,158 | $69.8M |
| TD Asset Management Inc | 0.04% | Add +1.6% | 1,963,052 | $52.6M |
| Dimensional Fund Advisors LP | 0.01% | Add +2.5% | 1,799,685 | $48.2M |
| State Street Corp. | 0.00% | Add +2.1% | 1,531,786 | $41.0M |
| Fuller & Thaler Asset Management, Inc. | 0.13% | Add +3.0% | 1,394,463 | $37.3M |
| Marshall Wace, LLP | 0.03% | Add +41.5% | 1,237,284 | $33.1M |
| Epoch Investment Partners, Inc. | 0.17% | Reduce -0.7% | 1,126,585 | $30.2M |
| Boston Trust Walden Corp | 0.22% | Reduce -7.3% | 1,087,266 | $29.1M |
| Geode Capital Management, LLC | 0.00% | Reduce -3.9% | 886,825 | $23.8M |
| American Century Companies Inc. | 0.01% | Add +130.6% | 665,336 | $17.8M |
| Morgan Stanley | 0.00% | Add +3.0% | 591,631 | $15.8M |
| Arrowstreet Capital, Limited Partnership | 0.01% | Add +42.6% | 559,426 | $15.0M |
| D. E. Shaw & Co. | 0.01% | Add +7.7% | 557,066 | $14.9M |
| Goldman Sachs Group Inc. | 0.00% | Add +130.8% | 556,709 | $14.9M |
| Renaissance Technologies | 0.02% | Reduce -7.2% | 544,700 | $14.6M |
| Invesco Ltd. | 0.00% | Add +28.7% | 501,404 | $13.4M |
| Systematic Financial Management LP | 0.28% | Add +3.0% | 435,580 | $11.7M |
| Hotchkis & Wiley Capital Management LLC | 0.03% | Add +23.4% | 402,563 | $10.8M |
| Northern Trust Corp. | 0.00% | Reduce -7.0% | 371,391 | $9.9M |
| Royce & Associates LP | 0.10% | Reduce -3.8% | 352,297 | $9.4M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -1.6% | 350,707 | $9.4M |
| Bridgeway Capital Management, LLC | 0.18% | Add +3.6% | 323,549 | $8.7M |
| Clark Capital Management Group, Inc. | 0.05% | Add +11.9% | 317,482 | $8.5M |
| Victory Capital Management Inc. | 0.00% | Add +44.1% | 305,161 | $8.2M |
| Millennium Management | 0.01% | Reduce -58.3% | 290,673 | $7.8M |
| Bank of New York Mellon Corp | 0.00% | Reduce -3.3% | 259,061 | $6.9M |
| UBS Group AG | 0.00% | Reduce -17.8% | 256,624 | $6.9M |
| Bridge City Capital, LLC | 1.85% | Add +72.8% | 235,485 | $6.3M |
| Voloridge Investment Management, LLC | 0.02% | Reduce -20.9% | 231,305 | $6.2M |
| Citadel Advisors | 0.00% | Add +0.9% | 228,724 | $6.1M |
| Principal Financial Group Inc. | 0.00% | Add +6.0% | 217,974 | $5.8M |
| Jane Street Group, LLC | 0.01% | Add +46.5% | 217,537 | $5.8M |
| Denali Advisors LLC | 0.63% | Add +56.9% | 211,765 | $5.7M |
| Pacer Advisors, Inc. | 0.01% | Add +2864.4% | 177,744 | $4.8M |
| Empowered Funds, LLC | 0.08% | Add +10.8% | 165,907 | $4.4M |
| JPMorgan Chase & Co. | 0.00% | Reduce -37.4% | 158,644 | $4.2M |
| First Trust Advisors LP | 0.00% | Reduce -6.7% | 140,310 | $3.8M |
| Ameriprise Financial Inc. | 0.00% | Add +3.0% | 133,715 | $3.6M |
| Lam Group, Inc. | 2.00% | No change | 130,800 | $3.5M |
| Nordea Investment Management AB | 0.00% | Reduce -15.8% | 129,144 | $3.5M |
| Bank of America Corp. | 0.00% | Add +0.8% | 128,174 | $3.4M |
| New York State Common Retirement Fund | 0.00% | Add +39.7% | 125,968 | $3.4M |
| Algert Global LLC | 0.05% | Reduce -68.2% | 125,130 | $3.4M |
| Public Sector Pension Investment Board | 0.01% | Reduce -12.3% | 122,505 | $3.3M |
| Rice Hall James & Associates, LLC | 0.18% | Reduce -6.3% | 121,176 | $3.2M |
| Bessemer Group Inc. | 0.01% | Add +84438.5% | 120,890 | $3.2M |
| BNP Paribas Financial Markets | 0.00% | Reduce -45.5% | 120,893 | $3.2M |
| Trexquant Investment LP | 0.03% | New | 113,673 | $3.0M |
| Qube Research & Technologies Ltd | 0.00% | Reduce -53.8% | 111,439 | $3.0M |
| LSV Asset Management | 0.01% | Add +50.5% | 110,300 | $3.0M |
| Brandywine Global Investment Management, LLC | 0.02% | New | 105,417 | $2.8M |
| Two Sigma Investments, LP | 0.00% | No change | 98,678 | $2.6M |
| SG Americas Securities, LLC | 0.00% | New | 93,515 | $2.5M |
| Quantedge Capital Pte Ltd | 1.17% | Add +103.3% | 91,700 | $2.5M |
| Legal & General Group Plc | 0.00% | Reduce -7.0% | 90,730 | $2.4M |
| O'shaughnessy Asset Management, LLC | 0.01% | Add +26.3% | 87,183 | $2.3M |
| Raymond James Financial Inc. | 0.00% | Reduce -28.5% | 84,454 | $2.3M |
| Rhumbline Advisers | 0.00% | Reduce -8.6% | 82,390 | $2.2M |
| Balyasny Asset Management L.P. | 0.00% | Reduce -45.4% | 77,467 | $2.1M |
| Nuveen, LLC | 0.00% | Reduce -2.1% | 76,101 | $2.0M |
| Barclays PLC | 0.00% | Add +13.3% | 75,319 | $2.0M |
| Swiss National Bank | 0.00% | No change | 72,600 | $1.9M |
| AQR Capital Management | 0.00% | Add +8.9% | 67,652 | $1.8M |
| Susquehanna Portfolio Strategies, LLC | 0.03% | Add +69.3% | 66,969 | $1.8M |
| CX Institutional | 0.05% | Add +1.3% | 64,123 | $1.7M |
| Intech Investment Management LLC | 0.02% | Add +23.6% | 63,232 | $1.7M |
| Cibc World Market Inc. | 0.00% | New | 62,192 | $1.7M |
| Alliancebernstein L.P. | 0.00% | Add +19.8% | 60,630 | $1.6M |
| SteelPeak Wealth, LLC | 0.05% | No change | 55,695 | $1.5M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +1.6% | 55,232 | $1.5M |
| Assetmark, Inc. | 0.00% | Reduce -3.8% | 54,359 | $1.5M |
| Creative Planning | 0.00% | Reduce -6.3% | 51,664 | $1.4M |
| XTX Topco Ltd | 0.03% | New | 48,607 | $1.3M |
| Prudential Financial Inc. | 0.00% | Reduce -0.5% | 47,203 | $1.3M |
| Wells Fargo & Company | 0.00% | Add +57.6% | 45,302 | $1.2M |
| SummerHaven Investment Management, LLC | 0.58% | No change | 38,200 | $1.0M |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -86.6% | 36,796 | $986K |
| California State Teachers Retirement System | 0.00% | Reduce -0.2% | 35,798 | $959K |
| Polaris Capital Management, LLC | 0.08% | Add +171.2% | 35,532 | $952K |
| DekaBank Deutsche Girozentrale | 0.00% | No change | 20,848 | $951K |
| Campbell & CO Investment Adviser LLC | 0.04% | Reduce -30.4% | 30,682 | $822K |
| CANADA LIFE ASSURANCE Co | 0.00% | No change | 30,216 | $809K |
| Canada Pension Plan Investment Board | 0.00% | Add +44.0% | 29,800 | $798K |
| Deutsche Bank AG | 0.00% | Add +4.1% | 29,557 | $792K |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.00% | New | 29,104 | $785K |
| Envestnet Asset Management Inc. | 0.00% | Add +31.2% | 28,823 | $772K |
| Illumine Investment Management, LLC | 0.55% | Add +2.4% | 28,328 | $759K |
| Citigroup Inc. | 0.00% | Add +42.7% | 28,280 | $757K |
| State of Alaska, Department of Revenue | 0.01% | Add +34.3% | 27,916 | $747K |
| Gotham Asset Management | 0.00% | Add +81.0% | 27,802 | $745K |
| Freestone Grove Partners LP | 0.01% | New | 27,593 | $739K |
| Legato Capital Management LLC | 0.06% | Reduce -26.3% | 26,590 | $712K |
| Arkadios Wealth Advisors | 0.01% | Reduce -26.9% | 26,303 | $704K |
| Franklin Resources Inc. | 0.00% | Add +173.4% | 26,045 | $697K |
| Advisor OS, LLC | 0.05% | No change | 25,405 | $680K |
| Thrivent Financial for Lutherans | 0.00% | Reduce -5.9% | 24,313 | $651K |
| Federated Hermes, Inc. | 0.00% | New | 23,537 | $630K |
| New York State Teachers Retirement System | 0.00% | Reduce -1.5% | 22,977 | $615K |
| MetLife Investment Management, LLC | 0.00% | Reduce -8.7% | 21,075 | $564K |
| Illinois Municipal Retirement Fund | 0.01% | Add +0.8% | 20,913 | $560K |
| Round Rock Advisors LLC | 0.08% | Add +138.7% | 20,477 | $548K |
| Brevan Howard Capital Management LP | 0.01% | Add +51.7% | 20,465 | $548K |
| Vident Advisory, LLC | 0.01% | Add +10.7% | 20,409 | $547K |
| LPL Financial LLC | 0.00% | Add +35.5% | 19,844 | $531K |
| Los Angeles Capital Management LLC | 0.00% | Add +2.4% | 19,397 | $478K |
| State of Wisconsin Investment Board | 0.00% | Reduce -17.9% | 17,506 | $469K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -2.1% | 16,879 | $452K |
| Janus Henderson Group PLC | 0.00% | No change | 16,868 | $452K |
| Sterling Capital Management LLC | 0.01% | Add +42.3% | 16,602 | $445K |
| Alps Advisors Inc. | 0.00% | Add +1.1% | 16,431 | $440K |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -7.7% | 16,402 | $439K |
| Vestcor Inc | 0.01% | Add +74.6% | 16,383 | $439K |
| Louisiana State Employees Retirement System | 0.01% | Reduce -1.8% | 16,200 | $434K |
| Quantinno Capital Management LP | 0.00% | Add +17.4% | 15,568 | $417K |
| Assenagon Asset Management S.A. | 0.00% | No change | 15,216 | $407K |
| Advisory Research Inc. | 0.05% | Reduce -2.0% | 15,161 | $406K |
| ExodusPoint Capital Management, LP | 0.00% | New | 14,929 | $400K |
| Squarepoint Ops LLC | 0.00% | Reduce -69.9% | 14,860 | $398K |
| Deerfield Management Company, L.P. | 0.01% | New | 14,852 | $398K |
| MML Investors Services, LLC | 0.00% | Add +73.3% | 14,661 | $393K |
| Sei Investments Co. | 0.00% | Add +22.4% | 14,649 | $392K |
| Quantbot Technologies LP | 0.01% | Reduce -51.2% | 14,515 | $389K |
| Janney Montgomery Scott LLC | 0.00% | Add +6.2% | 14,230 | $381K |
| Man Group plc | 0.00% | Reduce -56.3% | 14,151 | $379K |
| Osaic Holdings, Inc. | 0.00% | Reduce -59.3% | 12,854 | $344K |
| Martingale Asset Management L P | 0.01% | Reduce -33.0% | 12,400 | $332K |
| VIRGINIA RETIREMENT SYSTEMS ET Al | 0.00% | Reduce -8.8% | 12,362 | $331K |
| Cim, LLC | 0.04% | Reduce -2.5% | 11,342 | $304K |
| Segall Bryant & Hamill, LLC | 0.00% | No change | 11,185 | $300K |
| Profund Advisors LLC | 0.01% | Add +35.8% | 11,121 | $298K |
| State Board of Administration of Florida Retirement System | 0.00% | No change | 10,913 | $292K |
| Vanguard Personalized Indexing Management, LLC | 0.00% | Reduce -4.9% | 10,462 | $280K |
| Arizona State Retirement System | 0.00% | Reduce -6.4% | 10,428 | $279K |
| Amalgamated Bank | 0.00% | Reduce -0.7% | 10,419 | $279K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 10,263 | $275K |
| Significant Wealth Partners LLC | 0.29% | Reduce -53.2% | 9,624 | $258K |
| Exchange Traded Concepts, LLC | 0.00% | Reduce -5.7% | 9,418 | $252K |
| Acadian Asset Management LLC | 0.00% | Reduce -79.0% | 9,332 | $249K |
| Royal Bank of Canada | 0.00% | Reduce -81.3% | 9,265 | $248K |
| Ameritas Advisory Services, LLC | 0.01% | New | 9,186 | $246K |
| ProShare Advisors LLC | 0.00% | Add +5.3% | 9,083 | $243K |
| Teachers Retirement System of the State of Kentucky | 0.00% | Reduce -14.0% | 9,053 | $242K |
| Commonwealth of Pennsylvania Public School Empls Retrmt SYS | 0.00% | Reduce -3.9% | 8,760 | $235K |
| Commonwealth Equity Services, LLC | 0.00% | Add +11.2% | 8,742 | $234K |
| State of Tennessee, Department of Treasury | 0.00% | Reduce -7.3% | 8,619 | $228K |
| Comerica Bank | 0.00% | Reduce -10.3% | 8,488 | $227K |
| Yousif Capital Management, LLC | 0.00% | Reduce -6.0% | 8,721 | $226K |
| Oregon Public Employees Retirement Fund | 0.00% | Add +1.2% | 8,142 | $218K |
| Susquehanna International Group, LLP | 0.00% | New | 8,133 | $218K |
| KLP Kapitalforvaltning As | 0.00% | Add +6.8% | 7,900 | $212K |
| Corient Private Wealth LP | 0.00% | Reduce -50.1% | 7,839 | $210K |
| Jump Financial, LLC | 0.00% | New | 7,800 | $209K |
| AlphaQuest LLC | 0.01% | Reduce -10.0% | 7,720 | $207K |
| Rafferty Asset Management, LLC | 0.00% | New | 7,682 | $206K |
| State of Wyoming | 0.02% | Add +129.1% | 7,561 | $202K |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0.00% | No change | 7,504 | $201K |
| Corient IA LP | 0.19% | New | 7,500 | $201K |
| China Universal Asset Management Co., Ltd. | 0.02% | Reduce -8.1% | 7,488 | $201K |
| PNC Financial Services Group, Inc. | 0.00% | Add +5.0% | 5,808 | $156K |
| Public Employees Retirement Association of Colorado | 0.00% | No change | 5,265 | $141K |
| Hantz Financial Services, Inc. | 0.00% | Add +43.6% | 4,484 | $120K |
| Basecamp Wealth Advisors LLC | 0.03% | — | 4,388 | $118K |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0.00% | Add +1990.0% | 3,762 | $101K |
| Russell Investments Group, Ltd. | 0.00% | Reduce -51.4% | 3,729 | $100K |
| FMR LLC | 0.00% | Reduce -45.6% | 3,523 | $94K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 3,101 | $83K |
| Quadrant Capital Group LLC | 0.00% | Reduce -11.1% | 2,734 | $73K |
| TD Private Client Wealth LLC | 0.00% | Add +410.1% | 2,418 | $65K |
| Mirae Asset Global Investments Co., Ltd. | 0.00% | Add +24.2% | 2,233 | $60K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +117.4% | 1,787 | $48K |
| Group One Trading LLC | 0.00% | Reduce -15.9% | 1,741 | $47K |
| GAMMA Investing LLC | 0.00% | Add +37.8% | 1,685 | $45K |
| Cwm, LLC | 0.00% | Add +11.6% | 1,683 | $45K |
| Pinnacle Wealth Planning Services, Inc. | 0.00% | New | 1,615 | $43K |
| Allworth Financial LP | 0.00% | Add +0.8% | 1,486 | $40K |
| Farther Finance Advisors, LLC | 0.00% | Add +46.3% | 1,381 | $37K |
| Blue Trust, Inc. | 0.00% | Reduce -29.9% | 1,240 | $33K |
| Global Retirement Partners, LLC | 0.00% | Add +14.7% | 1,174 | $31K |
| IFP Advisors, Inc | 0.00% | Reduce -38.2% | 970 | $26K |
| Lazard Asset Management LLC | 0.00% | New | 912 | $24K |
| GF Fund Management Co. LTD. | 0.00% | Reduce -9.8% | 902 | $24K |
| CIBC Private Wealth Group LLC | 0.00% | Add +21.8% | 878 | $24K |
| Richardson Financial Services Inc. | 0.01% | Add +34.0% | 819 | $22K |
| US Bancorp \de | 0.00% | Reduce -5.2% | 806 | $22K |
| Larson Financial Group LLC | 0.00% | Add +87.8% | 768 | $21K |
| MassMutual Private Wealth & Trust, FSB | 0.00% | Reduce -17.3% | 767 | $21K |
| Torren Management, LLC | 0.01% | — | 762 | $20K |
| 1620 Investment Advisors, Inc. | 0.01% | Add +5.3% | 718 | $19K |
| Nisa Investment Advisors, LLC | 0.00% | Reduce -1.4% | 620 | $17K |
| Signaturefd, LLC | 0.00% | Add +3.8% | 542 | $15K |
| Jones Financial Companies LLLP | 0.00% | Add +44.7% | 531 | $14K |
| Fifth Third Bancorp | 0.00% | Add +12.9% | 509 | $14K |
| Public Employees Retirement System of Ohio | 0.00% | Add +8.6% | 508 | $14K |
| Versant Capital Management, Inc | 0.00% | Add +24.4% | 362 | $10K |
| MAI Capital Management | 0.00% | Add +517.2% | 358 | $10K |
| Harbor Capital Advisors, Inc. | 0.00% | Reduce -1.8% | 271 | $7K |
| Smartleaf Asset Management LLC | 0.00% | Add +25.1% | 259 | $7K |
| UMB Bank, n.a. | 0.00% | Add +1.2% | 250 | $7K |
| Salomon & Ludwin, LLC | 0.00% | Reduce -39.3% | 229 | $6K |
| Spire Wealth Management | 0.00% | Reduce -1.8% | 213 | $6K |
| Aster Capital Management (DIFC) Ltd | 0.00% | New | 200 | $5K |
| Essential Partners LLC | 0.00% | Reduce -20.0% | 200 | $5K |
| Huntington National Bank | 0.00% | Reduce -29.5% | 191 | $5K |
| Parkside Financial Bank & Trust | 0.00% | No change | 173 | $5K |
| Truvestments Capital LLC | 0.00% | No change | 154 | $4K |
| City State Bank | 0.00% | No change | 150 | $4K |
| Daiwa Securities Group Inc. | 0.00% | No change | 135 | $4K |
| CoreCap Advisors, LLC | 0.00% | No change | 107 | $3K |
| Rockefeller Capital Management L.P. | 0.00% | Reduce -76.4% | 100 | $3K |
| EverSource Wealth Advisors, LLC | 0.00% | Reduce -10.0% | 90 | $2K |
| Covestor Ltd | 0.00% | Add +5.4% | 59 | $2K |
| Avion Wealth | 0.00% | Reduce -32.3% | 84 | $2K |
| Parallel Advisors, LLC | 0.00% | Reduce -20.9% | 68 | $2K |
| WealthCollab, LLC | 0.00% | Reduce -69.1% | 64 | $2K |
| Optiver Holding B.V. | 0.00% | Reduce -56.2% | 64 | $2K |
| Legacy Wealth Managment, LLC | 0.00% | Add +490.0% | 59 | $2K |
| HighMark Wealth Management LLC | 0.00% | No change | 55 | $1K |
| SBI Securities Co., Ltd. | 0.00% | Add +2.4% | 43 | $1K |
| Physician Wealth Advisors, Inc. | 0.00% | No change | 41 | $1K |
| Arax Advisory Partners | 0.00% | Reduce -86.1% | 33 | $884 |
| Elequin Capital, LP | 0.00% | New | 27 | $723 |
| Private Wealth Management Group, LLC | 0.00% | Reduce -3.7% | 26 | $697 |
| Rothschild Investment LLC | 0.00% | Add +66.7% | 25 | $670 |
| Farmers & Merchants Investments Inc. | 0.00% | No change | 25 | $670 |
| Flagship Harbor Advisors, LLC | 0.00% | New | 25 | $670 |
| Hughes Financial Services, LLC | 0.00% | No change | 24 | $643 |
| Picton Mahoney Asset Management | 0.00% | No change | 24 | $643 |
| Sunbelt Securities, Inc. | 0.00% | No change | 22 | $589 |
| Optima Capital LLC | 0.00% | New | 20 | $536 |
| Ankerstar Wealth, LLC | 0.00% | — | 15 | $402 |
| Kayne Anderson Rudnick Investment Management LLC | 0.00% | No change | 15 | $402 |
| Trust Co | 0.00% | New | 15 | $402 |
| Abound Wealth Management | 0.00% | No change | 4 | $108 |
| Gilpin Wealth Management, LLC | 0.00% | — | 2 | $54 |
| Capital Advisors, Ltd. LLC | 0.00% | Add +37.5% | 11 | $0 |
"% of holder's portfolio" is AMPH's weight in each manager's 13F, not the share of Amphastar Pharmaceuticals Inc. the manager owns.