Who Owns AMPHASTAR PHARMACEUTICALS IN (AMPH)? -- Institutional Holders (2026-06-30)
265 institutions reported holding $902.6M of AMPHASTAR PHARMACEUTICALS IN (AMPH) in SEC 13F filings for 2026-06-30. Largest institutional holders: BlackRock, Inc. ($111.6M), Context Capital Management, LLC ($85.2M), VANGUARD GROUP INC ($53.2M), DIMENSIONAL FUND ADVISORS LP ($46.5M), DeepCurrents Investment Group LLC ($41.0M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|
| 1 | BlackRock, Inc. | $111.6M | 5.2M | Added |
| 2 | Context Capital Management, LLC | $85.2M | 0 | Added |
| 3 | VANGUARD GROUP INC | $53.2M | 2.6M | Trimmed |
| 4 | DIMENSIONAL FUND ADVISORS LP | $46.5M | 2.3M | Added |
| 5 | DeepCurrents Investment Group LLC | $41.0M | 0 | New |
| 6 | OAKTREE CAPITAL MANAGEMENT LP | $37.2M | 0 | Added |
| 7 | STATE STREET CORP | $33.1M | 1.6M | Added |
| 8 | MILLENNIUM MANAGEMENT LLC | $31.6M | 31,814 | Added |
| 9 | AMERICAN CENTURY COMPANIES INC | $23.7M | 1.2M | Added |
| 10 | Empyrean Capital Partners, LP | $22.0M | 0 | Added |
| 11 | MARSHALL WACE, LLP | $21.5M | 1.1M | Added |
| 12 | Nuveen, LLC | $21.4M | 88,397 | Added |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | $19.6M | 969,840 | Trimmed |
| 14 | FULLER & THALER ASSET MANAGEMENT, INC. | $19.2M | 949,238 | Trimmed |
| 15 | D. E. Shaw & Co., Inc. | $17.9M | 887,048 | Added |
| 16 | CAMDEN ASSET MANAGEMENT L P /CA | $13.9M | 0 | Trimmed |
| 17 | LSV ASSET MANAGEMENT | $13.0M | 642,014 | Trimmed |
| 18 | Fort Baker Capital Management LP | $11.4M | 0 | New |
| 19 | RENAISSANCE TECHNOLOGIES LLC | $10.6M | 525,100 | Trimmed |
| 20 | GOLDMAN SACHS GROUP INC | $10.2M | 505,360 | Added |
| 21 | MORGAN STANLEY | $9.6M | 434,840 | Trimmed |
| 22 | CAPSTONE INVESTMENT ADVISORS, LLC | $9.2M | 0 | New |
| 23 | SYSTEMATIC FINANCIAL MANAGEMENT LP | $8.8M | 437,384 | Trimmed |
| 24 | UBS Group AG | $7.9M | 393,110 | Trimmed |
| 25 | HRT FINANCIAL LP | $7.8M | 387,530 | Added |
Source: SEC Form 13F filings · as of 2026-06-30