Who owns Amphastar Pharmaceuticals?
- Ticker: AMPH
- CUSIP Number: 03209r103
Tip: Access positions for across all investors
Analyze quarterly positions in Amphastar Pharmaceuticals with up to 7 years of data, all consolidated into one spreadsheet
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Top investors of Amphastar Pharmaceuticals stock
Who bought or sold Amphastar Pharmaceuticals this quarter?
| Fund or Company Name | Shares Held | Valued At | Change in Shares | As Of | Actions |
|---|---|---|---|---|---|
| BlackRock | 5.4M | $106M | -1% | Mar 2026 |
|
| Vanguard Group | 2.6M | $70M | -1% | Dec 2025 |
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| Dimensional Fund Advisors | 2.0M | $40M | 13% | Mar 2026 |
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| Vanguard Capital Management | 1.5M | $30M | 100% | Mar 2026 |
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| TD Asset Management | 1.5M | $30M | -21% | Mar 2026 |
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| State Street Corporation | 1.5M | $41M | 2% | Dec 2025 |
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| Hanna Zanoni | 1.4M | $37M | 3% | Dec 2025 |
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| Marshall Wace | 1.2M | $33M | 42% | Dec 2025 |
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| Epoch Investment Partners | 1.1M | $30M | -1% | Dec 2025 |
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| Geode Capital Management | 977k | $19M | 10% | Mar 2026 |
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| Btim | 945k | $19M | -13% | Mar 2026 |
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| Vanguard Portfolio Management | 788k | $15M | 100% | Mar 2026 |
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| D. E. Shaw & Co | 666k | $13M | 19% | Mar 2026 |
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| American Century Companies | 665k | $18M | 131% | Dec 2025 |
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| LSV Asset Management | 652k | $13M | 491% | Mar 2026 |
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| Invesco | 605k | $12M | 21% | Mar 2026 |
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| Arrowstreet Capital, Limited Partnership | 559k | $15M | 43% | Dec 2025 |
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| Renaissance Technologies | 545k | $15M | -7% | Dec 2025 |
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| Systematic Financial Management | 453k | $8.9M | 4% | Mar 2026 |
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| Morgan Stanley | 420k | $8.2M | -29% | Mar 2026 |
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| UBS Group | 420k | $8.2M | 64% | Mar 2026 |
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| Royce & Associates | 406k | $8.0M | 15% | Mar 2026 |
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| Northern Trust | 371k | $9.9M | -7% | Dec 2025 |
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| Millennium Management | 371k | $7.3M | 28% | Mar 2026 |
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| Charles Schwab Investment Management | 351k | $9.4M | -2% | Dec 2025 |
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| Bridge City Capital | 335k | $6.6M | 42% | Mar 2026 |
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| Goldman Sachs Group | 329k | $6.5M | -41% | Mar 2026 |
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| Bridgeway Capital Management | 324k | $8.7M | 4% | Dec 2025 |
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| Clark Capital Management Group | 318k | $8.5M | 12% | Dec 2025 |
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| Victory Capital Management | 305k | $8.2M | 44% | Dec 2025 |
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| Denali Advisors | 267k | $5.2M | 26% | Mar 2026 |
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| Bank of New York Mellon | 243k | $4.8M | -6% | Mar 2026 |
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| Vanguard Fiduciary Trust | 231k | $4.5M | 100% | Mar 2026 |
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| Principal Financial Group | 209k | $4.1M | -4% | Mar 2026 |
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| Rice Hall James & Associates | 187k | $3.7M | 55% | Mar 2026 |
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| Bank of America Corporation | 174k | $3.4M | 100% | Mar 2026 |
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| Voloridge Investment Management | 171k | $3.4M | -26% | Mar 2026 |
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| Empowered Funds | 166k | $4.4M | 11% | Dec 2025 |
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| Bnp Paribas Arbitrage, Snc | 156k | $3.1M | 29% | Mar 2026 |
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| Jane Street | 154k | $3.0M | -33% | Mar 2026 |
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| First Trust Advisors | 151k | $3.0M | 7% | Mar 2026 |
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| New York State Common Retirement Fund | 149k | $2.9M | 18% | Mar 2026 |
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| Universal- Beteiligungs- und Servicegesellschaft mbH | 139k | $2.7M | 379% | Mar 2026 |
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| Franklin Resources | 139k | $2.7M | 435% | Mar 2026 |
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| Two Sigma Investments | 138k | $2.7M | 40% | Mar 2026 |
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| Lam Group | 131k | $2.6M | 0% | Mar 2026 |
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| Public Sector Pension Investment Board | 127k | $2.5M | 3% | Mar 2026 |
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| Nordea Investment Management Ab | 124k | $2.4M | -4% | Mar 2026 |
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| Bessemer | 122k | $2.4M | 1% | Mar 2026 |
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| Qube Research & Technologies | 111k | $3.0M | -54% | Dec 2025 |
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| Brandywine Global Investment Management | 105k | $2.8M | 100% | Dec 2025 |
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| O'shaughnessy Asset Management | 104k | $2.0M | 19% | Mar 2026 |
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| Citadel Advisors | 85k | $1.7M | -65% | Mar 2026 |
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| Raymond James Financial | 85k | $2.3M | -29% | Dec 2025 |
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| Rhumbline Advisers | 84k | $1.6M | 2% | Mar 2026 |
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| Exchange Traded Concepts | 82k | $1.6M | 775% | Mar 2026 |
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| Legal & General Group | 81k | $1.6M | -11% | Mar 2026 |
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| AQR Capital Management | 79k | $1.5M | 16% | Mar 2026 |
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| Ameriprise Financial | 79k | $1.5M | -41% | Mar 2026 |
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| Nuveen | 77k | $1.5M | 1% | Mar 2026 |
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| Barclays | 75k | $2.0M | 13% | Dec 2025 |
|
| Swiss National Bank | 73k | $1.4M | 0% | Mar 2026 |
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| Susquehanna Portfolio Strategies | 67k | $1.8M | 69% | Dec 2025 |
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| Robeco Institutional Asset Management B V | 66k | $1.3M | 100% | Mar 2026 |
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| Hussman Econometrics Advisors | 63k | $1.2M | 100% | Mar 2026 |
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| Algert Coldiron Investors | 62k | $1.2M | -50% | Mar 2026 |
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| Alliancebernstein | 56k | $1.5M | -7% | Mar 2026 |
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| Hrt Financial | 56k | $1.1M | 100% | Mar 2026 |
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| Ubs Global Asset Management Americas | 55k | $1.1M | 0% | Mar 2026 |
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| Assetmark | 54k | $1.1M | -1% | Mar 2026 |
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| Prudential Financial | 51k | $993k | 7% | Mar 2026 |
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| Vanguard Global Advisers | 50k | $983k | 100% | Mar 2026 |
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| XTX Topco | 49k | $1.3M | 100% | Dec 2025 |
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| Steel Peak Wealth Management | 49k | $949k | -13% | Mar 2026 |
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| Trexquant Investment | 48k | $938k | -58% | Mar 2026 |
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| Polaris Capital Management | 43k | $847k | 22% | Mar 2026 |
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| Wells Fargo & Company | 42k | $823k | -7% | Mar 2026 |
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| Hsbc Holdings | 38k | $754k | 100% | Mar 2026 |
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| Man Group | 37k | $731k | 163% | Mar 2026 |
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| Citigroup | 36k | $703k | 100% | Mar 2026 |
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| Legato Capital Management | 34k | $669k | 28% | Mar 2026 |
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| Segall Bryant & Hamill | 33k | $653k | 198% | Mar 2026 |
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| Deutsche Bank Aktiengesellschaft | 33k | $649k | 12% | Mar 2026 |
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| SG Americas Securities | 33k | $643k | -65% | Mar 2026 |
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| SummerHaven Investment Management | 33k | $639k | -15% | Mar 2026 |
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| Great-West Life Assurance Company | 30k | $809k | 0% | Dec 2025 |
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| Freestone Grove Partners | 30k | $585k | 8% | Mar 2026 |
|
| Squarepoint Ops | 28k | $555k | 91% | Mar 2026 |
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| California State Teachers Retirement System | 28k | $554k | -21% | Mar 2026 |
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| Illumine Investment Management | 28k | $550k | -1% | Mar 2026 |
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| Alaska Retirement Management Board | 27k | $537k | -2% | Mar 2026 |
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| Advisor OS | 25k | $498k | 0% | Mar 2026 |
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| Intech Investment Management | 24k | $474k | -62% | Mar 2026 |
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| Thrivent Financial for Lutherans | 24k | $463k | -3% | Mar 2026 |
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| Vanguard Asset Management | 23k | $452k | 100% | Mar 2026 |
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| New York State Teachers Retirement System | 22k | $428k | -5% | Mar 2026 |
|
| MetLife Investment Advisors | 21k | $564k | -9% | Dec 2025 |
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| Round Rock Advisors | 21k | $402k | 0% | Mar 2026 |
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| Vident Advisory | 20k | $547k | 11% | Dec 2025 |
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| Illinois Municipal Retirement Fund | 20k | $383k | -7% | Mar 2026 |
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| Envestnet Asset Management | 18k | $358k | -37% | Mar 2026 |
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| nVerses Capital | 18k | $346k | 100% | Mar 2026 |
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| State of Wisconsin Investment Board | 18k | $469k | -18% | Dec 2025 |
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| Henderson Group | 17k | $331k | 0% | Mar 2026 |
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| Mirae Asset Global Etfs Holdings | 17k | $330k | 0% | Mar 2026 |
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| Creative Planning | 16k | $321k | -68% | Mar 2026 |
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| Canada Pension Plan Investment Board | 16k | $319k | -45% | Mar 2026 |
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| Manufacturers Life Insurance Company | 16k | $311k | -3% | Mar 2026 |
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| Louisiana State Employees Retirement System | 16k | $308k | -3% | Mar 2026 |
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| Assenagon Asset Management | 15k | $298k | 0% | Mar 2026 |
|
| Advisory Research | 15k | $406k | -2% | Dec 2025 |
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| Federated Investors | 14k | $276k | -40% | Mar 2026 |
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| Janney Montgomery Scott | 14k | $271k | -3% | Mar 2026 |
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| Quantedge Capital Pte | 14k | $265k | -85% | Mar 2026 |
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| Hohimer Wealth Management | 13k | $256k | 100% | Mar 2026 |
|
| Advisor Group Holdings | 13k | $344k | -59% | Dec 2025 |
|
| State of New Jersey Common Pension Fund D | 13k | $246k | 100% | Mar 2026 |
|
| Mml Investors Services | 12k | $242k | -16% | Mar 2026 |
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| Virginia Retirement System | 12k | $331k | -9% | Dec 2025 |
|
| Brevan Howard Capital Management | 12k | $228k | -43% | Mar 2026 |
|
| Natixis Asset Management Advisors | 12k | $225k | 100% | Mar 2026 |
|
| PDT Partners | 11k | $224k | 100% | Mar 2026 |
|
| Magnetar Financial | 11k | $220k | 100% | Mar 2026 |
|
| Vestcor Investment Management Corp | 11k | $214k | -33% | Mar 2026 |
|
| Florida State Board of Administration | 11k | $214k | 0% | Mar 2026 |
|
| ProFund Advisors | 11k | $209k | -4% | Mar 2026 |
|
| Sterling Capital Management | 10k | $203k | -37% | Mar 2026 |
|
| JustInvest | 10k | $202k | -2% | Mar 2026 |
|
| Police & Firemen's Retirement System of New Jersey | 10k | $201k | 0% | Mar 2026 |
|
| Amalgamated Bank | 10k | $200k | -2% | Mar 2026 |
|
| Arizona State Retirement System | 10k | $198k | -3% | Mar 2026 |
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| Teachers Retirement System Of The State Of Kentucky | 9.1k | $178k | 0% | Mar 2026 |
|
| Fifth Third Bancorp | 8.8k | $171k | 1619% | Mar 2026 |
|
| State of Tennessee, Treasury Department | 8.6k | $169k | 0% | Mar 2026 |
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| Vanguard Investments Australia | 8.6k | $168k | 100% | Mar 2026 |
|
| Brian McDonald | 8.5k | $227k | -10% | Dec 2025 |
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| Susquehanna International | 8.1k | $218k | 100% | Dec 2025 |
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| China Universal Asset Management | 8.1k | $158k | 8% | Mar 2026 |
|
| Oregon Public Employees Retirement Fund | 8.0k | $158k | -1% | Mar 2026 |
|
| Klp Kapitalforvaltning As | 7.9k | $155k | 0% | Mar 2026 |
|
| Jump Financial | 7.8k | $209k | 100% | Dec 2025 |
|
| Zurcher Kantonalbank | 7.8k | $153k | 4% | Mar 2026 |
|
| Rafferty Asset Management | 7.7k | $206k | 100% | Dec 2025 |
|
| Corient IA | 7.5k | $201k | 100% | Dec 2025 |
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| Pnc Financial Services | 5.4k | $107k | -6% | Mar 2026 |
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| Public Employees' Retirement Association of Colorado | 5.3k | $103k | 0% | Mar 2026 |
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| Bnp Paribas Investment Partners | 3.8k | $103k | 1990% | Dec 2025 |
|
| Royal Bank of Canada | 3.5k | $71k | -93% | Mar 2026 |
|
| FMR | 3.5k | $94k | -46% | Dec 2025 |
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| Russell Investments | 3.4k | $68k | -8% | Mar 2026 |
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| CX Institutional | 3.0k | $58k | -95% | Mar 2026 |
|
| Hantz Financial Services | 2.0k | $40k | -55% | Mar 2026 |
|
| Thomas Stevens, CFA" | 217.00 | $4.3k | -99% | Mar 2026 |
|