AMPH
Amphastar Pharmaceuticals, Inc.Company with tickers: AMPH
CIK
1297184
CUSIP
03209R103
Shares Outstanding
45,370,171
Price
Holdings
Short Volume
Short Interest
Fails to Deliver
SEC Filings
Earnings Calls
Insider Trading
Congress Trades
Report Date:
Holders: 231
Total Value: $830,212,940
Total Shares: 31,001,236
Showing top 100 of 231 holders by value
| Holder | Value (USD) | Shares | Type | Discretion | Filed | Action |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | $146,272,754 | 5,462,015 | Shares | Sole | 2026-02-12 | View |
| VANGUARD GROUP INC | $61,941,175 | 2,312,964 | Shares | Sole | 2026-01-29 | View |
| TD ASSET MANAGEMENT INC | $52,570,532 | 1,963,052 | Shares | Sole | 2026-02-10 | View |
| DIMENSIONAL FUND ADVISORS LP | $48,195,561 | 1,799,685 | Shares | Sole | 2026-02-12 | View |
| STATE STREET CORP | $41,021,229 | 1,531,786 | Shares | Defined | 2026-02-13 | View |
| MARSHALL WACE, LLP | $33,134,464 | 1,237,284 | Shares | Other | 2026-02-13 | View |
| Epoch Investment Partners, Inc. | $30,169,946 | 1,126,585 | Shares | Defined | 2026-02-13 | View |
| Boston Trust Walden Corp | $29,116,982 | 1,087,266 | Shares | Defined | 2026-01-28 | View |
| GEODE CAPITAL MANAGEMENT, LLC | $23,749,172 | 886,825 | Shares | Defined | 2026-02-09 | View |
| AMERICAN CENTURY COMPANIES INC | $17,817,698 | 665,336 | Shares | Defined | 2026-02-13 | View |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $14,981,428 | 559,426 | Shares | Defined | 2026-02-13 | View |
| D. E. Shaw & Co., Inc. | $14,918,227 | 557,066 | Shares | Defined | 2026-02-17 | View |
| GOLDMAN SACHS GROUP INC | $14,908,666 | 556,709 | Shares | Defined | 2026-02-10 | View |
| RENAISSANCE TECHNOLOGIES LLC | $14,587,066 | 544,700 | Shares | Sole | 2026-02-12 | View |
| Invesco Ltd. | $13,427,596 | 501,404 | Shares | Defined | 2026-02-19 | View |
| SYSTEMATIC FINANCIAL MANAGEMENT LP | $11,664,832 | 435,580 | Shares | Other | 2026-02-09 | View |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | $10,780,637 | 402,563 | Shares | Sole | 2026-02-17 | View |
| NORTHERN TRUST CORP | $9,945,848 | 371,391 | Shares | Other | 2026-02-17 | View |
| ROYCE & ASSOCIATES LP | $9,434,513 | 352,297 | Shares | Sole | 2026-02-09 | View |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $9,391,933 | 350,707 | Shares | Sole | 2026-02-13 | View |
| BRIDGEWAY CAPITAL MANAGEMENT INC | $8,664,642 | 323,549 | Shares | Sole | 2026-02-17 | View |
| Clark Capital Management Group, Inc. | $8,502,167 | 317,482 | Shares | Sole | 2026-02-17 | View |
| VICTORY CAPITAL MANAGEMENT INC | $8,172,211 | 305,161 | Shares | Sole | 2026-02-13 | View |
| MILLENNIUM MANAGEMENT LLC | $7,784,222 | 290,673 | Shares | Sole | 2026-02-17 | View |
| Bank of New York Mellon Corp | $6,937,649 | 259,061 | Shares | Defined | 2026-02-10 | View |
| UBS Group AG | $6,872,389 | 256,624 | Shares | Defined | 2026-01-29 | View |
| Bridge City Capital, LLC | $6,306,288 | 235,485 | Shares | Sole | 2026-02-13 | View |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | $6,194,347 | 231,305 | Shares | Sole | 2026-02-17 | View |
| CITADEL ADVISORS LLC | $6,125,228 | 228,724 | Shares | Defined | 2026-02-17 | View |
| PRINCIPAL FINANCIAL GROUP INC | $5,837,342 | 217,974 | Shares | Defined | 2026-02-02 | View |
| JANE STREET GROUP, LLC | $5,825,640 | 217,537 | Shares | Defined | 2026-02-12 | View |
| DENALI ADVISORS LLC | $5,671,066 | 211,765 | Shares | Sole | 2026-02-03 | View |
| JPMORGAN CHASE & CO | $4,248,484 | 158,644 | Shares | Defined | 2026-02-11 | View |
| FIRST TRUST ADVISORS LP | $3,757,501 | 140,310 | Shares | Sole | 2026-02-13 | View |
| AMERIPRISE FINANCIAL INC | $3,580,887 | 133,715 | Shares | Defined | 2026-02-17 | View |
| LAM GROUP, INC. | $3,502,824 | 130,800 | Shares | Sole | 2026-01-23 | View |
| NORDEA INVESTMENT MANAGEMENT AB | $3,458,475 | 129,144 | Shares | Defined | 2026-01-08 | View |
| BANK OF AMERICA CORP /DE/ | $3,432,496 | 128,174 | Shares | Defined | 2026-02-17 | View |
| NEW YORK STATE COMMON RETIREMENT FUND | $3,373,423 | 125,968 | Shares | Sole | 2026-02-12 | View |
| ALGERT GLOBAL LLC | $3,350,981 | 125,130 | Shares | Sole | 2026-02-17 | View |
| Public Sector Pension Investment Board | $3,280,683 | 122,505 | Shares | Sole | 2026-02-13 | View |
| RICE HALL JAMES & ASSOCIATES, LLC | $3,245,093 | 121,176 | Shares | Sole | 2026-02-17 | View |
| BNP PARIBAS ARBITRAGE, SA | $3,237,514 | 120,893 | Shares | Defined | 2026-02-10 | View |
| BESSEMER GROUP INC | $3,237,433 | 120,890 | Shares | Defined | 2026-02-05 | View |
| Trexquant Investment LP | $3,044,162 | 113,673 | Shares | Sole | 2026-02-17 | View |
| Qube Research & Technologies Ltd | $2,984,336 | 111,439 | Shares | Sole | 2026-02-17 | View |
| LSV ASSET MANAGEMENT | $2,953,834 | 110,300 | Shares | Sole | 2026-02-06 | View |
| Brandywine Global Investment Management, LLC | $2,823,067 | 105,417 | Shares | Sole | 2026-02-11 | View |
| TWO SIGMA INVESTMENTS, LP | $2,642,596 | 98,678 | Shares | Sole | 2026-02-17 | View |
| SG Americas Securities, LLC | $2,504,331 | 93,515 | Shares | Sole | 2026-01-09 | View |
| Quantedge Capital Pte Ltd | $2,455,726 | 91,700 | Shares | Sole | 2026-02-17 | View |
| Legal & General Group Plc | $2,429,749 | 90,730 | Shares | Defined | 2026-02-09 | View |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC | $2,334,760 | 87,183 | Shares | Sole | 2026-02-11 | View |
| RAYMOND JAMES FINANCIAL INC | $2,261,678 | 84,454 | Shares | Defined | 2026-02-18 | View |
| RHUMBLINE ADVISERS | $2,206,404 | 82,390 | Shares | Sole | 2026-02-13 | View |
| Balyasny Asset Management LLC | $2,074,566 | 77,467 | Shares | Sole | 2026-02-17 | View |
| Nuveen, LLC | $2,037,983 | 76,101 | Shares | Defined | 2026-02-12 | View |
| BARCLAYS PLC | $2,017,041 | 75,319 | Shares | Sole | 2026-02-13 | View |
| Swiss National Bank | $1,944,228 | 72,600 | Shares | Sole | 2026-02-12 | View |
| AQR CAPITAL MANAGEMENT LLC | $1,811,718 | 67,652 | Shares | Defined | 2026-02-17 | View |
| Susquehanna Portfolio Strategies, LLC | $1,793,429 | 66,969 | Shares | Sole | 2026-02-17 | View |
| CX Institutional | $1,717,213 | 64,123 | Shares | Sole | 2026-02-02 | View |
| INTECH INVESTMENT MANAGEMENT LLC | $1,693,352 | 63,232 | Shares | Sole | 2026-02-10 | View |
| CIBC World Markets Inc. | $1,665,501 | 62,192 | Shares | Sole | 2026-02-10 | View |
| ALLIANCEBERNSTEIN L.P. | $1,623,671 | 60,630 | Shares | Defined | 2026-02-17 | View |
| Steel Peak Wealth Management LLC | $1,491,512 | 55,695 | Shares | Sole | 2026-01-20 | View |
| UBS ASSET MANAGEMENT AMERICAS INC | $1,479,111 | 55,232 | Shares | Defined | 2026-02-13 | View |
| ASSETMARK, INC | $1,455,734 | 54,359 | Shares | Sole | 2026-01-23 | View |
| Creative Planning | $1,383,561 | 51,664 | Shares | Sole | 2026-02-17 | View |
| XTX Topco Ltd | $1,301,695 | 48,607 | Shares | Defined | 2026-02-17 | View |
| PRUDENTIAL FINANCIAL INC | $1,264,096 | 47,203 | Shares | Defined | 2026-02-13 | View |
| WELLS FARGO & COMPANY/MN | $1,213,187 | 45,302 | Shares | Defined | 2026-02-13 | View |
| SummerHaven Investment Management, LLC | $1,022,996 | 38,200 | Shares | Sole | 2026-02-03 | View |
| PRICE T ROWE ASSOCIATES INC /MD/ | $985,396 | 36,796 | Shares | Defined | 2026-02-17 | View |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | $958,670 | 35,798 | Shares | Sole | 2026-02-17 | View |
| Polaris Capital Management, LLC | $951,546 | 35,532 | Shares | Sole | 2026-01-29 | View |
| Campbell & CO Investment Adviser LLC | $821,663 | 30,682 | Shares | Sole | 2026-02-12 | View |
| GREAT WEST LIFE ASSURANCE CO /CAN/ | $809,184 | 30,216 | Shares | Sole | 2026-02-13 | View |
| CANADA PENSION PLAN INVESTMENT BOARD | $798,044 | 29,800 | Shares | Sole | 2026-02-17 | View |
| DEUTSCHE BANK AG\ | $791,535 | 29,557 | Shares | Defined | 2026-02-11 | View |
| Universal- Beteiligungs- und Servicegesellschaft mbH | $779,405 | 29,104 | Shares | Defined | 2026-01-28 | View |
| ENVESTNET ASSET MANAGEMENT INC | $771,879 | 28,823 | Shares | Sole | 2026-02-10 | View |
| Illumine Investment Management, LLC | $758,623 | 28,328 | Shares | Sole | 2026-02-09 | View |
| CITIGROUP INC | $757,337 | 28,280 | Shares | Defined | 2026-02-13 | View |
| State of Alaska, Department of Revenue | $747,588 | 27,916 | Shares | Sole | 2026-01-23 | View |
| Gotham Asset Management, LLC | $744,537 | 27,802 | Shares | Sole | 2026-02-17 | View |
| Freestone Grove Partners LP | $738,940 | 27,593 | Shares | Sole | 2026-02-17 | View |
| MORGAN STANLEY | $719,444 | 26,865 | Shares | Defined | 2026-02-13 | View |
| Legato Capital Management LLC | $712,080 | 26,590 | Shares | Other | 2026-02-06 | View |
| Arkadios Wealth Advisors | $704,393 | 26,303 | Shares | Sole | 2026-02-13 | View |
| FRANKLIN RESOURCES INC | $697,484 | 26,045 | Shares | Defined | 2026-02-11 | View |
| Advisor OS, LLC | $680,345 | 25,405 | Shares | Sole | 2026-02-04 | View |
| Thrivent Financial for Lutherans | $651,102 | 24,313 | Shares | Sole | 2026-02-05 | View |
| FEDERATED HERMES, INC. | $630,320 | 23,537 | Shares | Defined | 2026-02-12 | View |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM | $615,324 | 22,977 | Shares | Sole | 2026-01-30 | View |
| MetLife Investment Management, LLC | $564,388 | 21,075 | Shares | Defined | 2026-02-12 | View |
| Illinois Municipal Retirement Fund | $560,050 | 20,913 | Shares | Sole | 2026-02-11 | View |
| DekaBank Deutsche Girozentrale | $558,309 | 20,848 | Shares | Defined | 2026-01-28 | View |
| Round Rock Advisors, LLC | $548,374 | 20,477 | Shares | Sole | 2026-01-27 | View |
| Brevan Howard Capital Management LP | $548,052 | 20,465 | Shares | Defined | 2026-02-17 | View |