AMPHASTAR PHARMACEUTICALS INC (AMPH) — large price moves
Health Care · NASDAQ
Single sessions where AMPH closed 10% or more away from the previous close, between 2025-10-21 and 2026-10-21. Each one lists the events filed in the 5 days ending at that session, in date order.
Of the 2 moves listed, 2 have at least one filed event in the 5 days ending at the session, and 0 have none. Across the catalog most large moves have nothing filed near them, so an empty list is an ordinary result and not a gap.
Moves
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2026-05-08 -20.9% $24.03 to $19.00 filed events in the 5 days to 2026-05-08
- 2026-05-07 Earnings Quarterly results reportedquarter ended 2026-03-31 · reported EPS USD 0.42 against an estimate of USD 0.71 · surprise -40.5%Source: SEC filing calendar + Yahoo earnings history
- 2026-05-07 Periodic filing 10-Q filedaccession 0001297184-26-000033Source: SEC EDGAR
- 2026-05-07 Material event 8-K filed (material event)accession 0001297184-26-000031Source: SEC EDGAR
- 2026-05-07 Filing language mdna changed in the 10-Qsection mdna · accession 0001297184-26-000033Source: SEC EDGAR (section comparison against the prior filing)
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2026-02-27 -23.6% $26.49 to $20.23 filed events in the 5 days to 2026-02-27
- 2026-02-26 Earnings Quarterly results reportedquarter ended 2025-12-31 · reported EPS USD 0.73 against an estimate of USD 0.92 · surprise -20.5%Source: SEC filing calendar + Yahoo earnings history
- 2026-02-26 Periodic filing 10-K filedaccession 0001297184-26-000009Source: SEC EDGAR
- 2026-02-26 Material event 8-K filed (material event)accession 0001297184-26-000007Source: SEC EDGAR
These are events filed near a session, listed by date. They are not ranked, and no connection between an event and a price move is stated or implied.
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Informational only — NOT financial advice. Price moves are computed from stored daily closes; filed events come from their own sources with their own dates.