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Amphastar Pharmaceuticals shares owned by Magnetar Financial

Quarter-by-quarter ownership of Amphastar Pharmaceuticals (AMPH) shares owned by Magnetar Financial from 13F filings

Historical chart of Magnetar Financial investment in Amphastar Pharmaceuticals

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All positions including Amphastar Pharmaceuticals held by Magnetar Financial consolidated in one spreadsheet with up to 7 years of data

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Quarterly reported holdings in Amphastar Pharmaceuticals by Magnetar Financial

Quarter filed Position value Share count Share price at filing
2026-03-31 $220k 11k 19.59
2025-06-30 $306k 13k 22.96

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View all positions for Magnetar Financial

Top funds holding Amphastar Pharmaceuticals

BlackRock
Vanguard Group
Dimensional Fund Advisors
Vanguard Capital Management
TD Asset Management
State Street Corporation
Hanna Zanoni
Marshall Wace
Epoch Investment Partners
Geode Capital Management
Btim
Vanguard Portfolio Management
D. E. Shaw & Co
American Century Companies
LSV Asset Management

View all funds holding Amphastar Pharmaceuticals