AMPH
AMPHASTAR PHARMACEUTICALS INData as of 2026 Q1 (03-31) · 13F snapshot
Summary
AMPHASTAR PHARMACEUTICALS IN (AMPH) is held by 5 tracked hedge-fund managers, a combined reported value of ~$21.20M; the largest are Renaissance Technologies, Izzy Englander, Ken Griffin. This quarter: 2 added, 1 trimmed, 1 closed. Data as of 2026 Q1, from public SEC 13F filings, delayed up to ~45 days.
Attention · MediumThis quarter · Mixed
Gurus holding5
Congress trades0
Price$18.72vs quarter-end-4.44%
Sectors0
This quarter's moves
Top holderRenaissance TechnologiesNew0
Added2
Trimmed / sold2
Value $389.8K— of portfolio19,9002026 Q1
Value $317.1K— of portfolio11,9002025 Q3
| Investor | Value | % of portfolio | Action |
|---|---|---|---|
| Ken GriffinCALL | $389.8K | — | — |
| Ken GriffinPUT | $317.1K | — | — |
Data from public SEC 13F & STOCK Act filings, delayed up to ~45 days, partial holdings only — for research, not investment advice.