Amphastar Pharmaceuticals, Inc. (NASDAQ:AMPH) showed up in the 13F filings of 229 institutional investors as of December 2025.
| Owner Name | Date | Shares Held | Change (QoQ) | Change (%) | Value (USD) |
|---|---|---|---|---|---|
| BlackRock, Inc. | 31 Mar, 2026 | 5,421,343 | -40,672 | -0.74% | $106,204,108.00 |
| DIMENSIONAL FUND ADVISORS LP | 31 Mar, 2026 | 2,027,947 | 228,262 | 12.68% | $39,726,234.00 |
| State Street Corp | 31 Mar, 2026 | 1,607,515 | 75,729 | 4.94% | $31,491,219.00 |
| VANGUARD CAPITAL MANAGEMENT LLC | 31 Mar, 2026 | 1,543,655 | 1,543,655 | 0.00% | $30,240,201.00 |
| TD ASSET MANAGEMENT INC | 31 Mar, 2026 | 1,541,044 | -422,008 | -21.50% | $30,189,052.00 |
| FULLER & THALER ASSET MANAGEMENT, INC. | 31 Mar, 2026 | 1,395,139 | -1,393,787 | -49.98% | $27,330,780.00 |
| MARSHALL WACE, LLP | 31 Mar, 2026 | 1,025,640 | -211,644 | -17.11% | $20,092,287.00 |
| AMERICAN CENTURY COMPANIES INC | 31 Mar, 2026 | 1,017,538 | 352,202 | 52.94% | $19,933,570.00 |
| GEODE CAPITAL MANAGEMENT, LLC | 31 Mar, 2026 | 976,650 | 89,825 | 10.13% | $19,135,848.00 |
| Boston Trust Walden Corp | 31 Mar, 2026 | 944,789 | -142,477 | -13.10% | $18,508,417.00 |
| Epoch Investment Partners, Inc. | 31 Mar, 2026 | 898,895 | -227,690 | -20.21% | $17,609,353.00 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 31 Mar, 2026 | 787,816 | 787,816 | 0.00% | $15,433,315.00 |
| D. E. Shaw & Co., Inc. | 31 Mar, 2026 | 665,542 | 108,476 | 19.47% | $13,037,968.00 |
| LSV ASSET MANAGEMENT | 31 Mar, 2026 | 651,714 | 541,414 | 490.86% | $12,767.00 |
| Invesco Ltd. | 31 Mar, 2026 | 604,774 | 103,370 | 20.62% | $11,847,522.00 |
| RENAISSANCE TECHNOLOGIES LLC | 31 Mar, 2026 | 553,900 | 9,200 | 1.69% | $10,850,901.00 |
| SYSTEMATIC FINANCIAL MANAGEMENT LP | 31 Mar, 2026 | 452,898 | 17,318 | 3.98% | $8,872,287.00 |
| Morgan Stanley | 31 Mar, 2026 | 420,337 | -171,294 | -28.95% | $8,234,414.00 |
| UBS Group AG | 31 Mar, 2026 | 420,263 | 163,639 | 63.77% | $8,232,952.00 |
| ROYCE & ASSOCIATES LP | 31 Mar, 2026 | 406,175 | 53,878 | 15.29% | $7,956,968.00 |