AMPRIUS TECHNOLOGIES INC (AMPX) — large price moves

Industrials · NYSE

Single sessions where AMPX closed 10% or more away from the previous close, between 2025-10-20 and 2026-10-20. Each one lists the events filed in the 5 days ending at that session, in date order.

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Of the 20 moves listed, 6 have at least one filed event in the 5 days ending at the session, and 14 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.

Showing the 20 most recent of 21 qualifying sessions.

Moves

2026-07-30 +12.2% $8.44 to $9.47 filed events in the 5 days to 2026-07-30

No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.
2026-07-16 -10.9% $11.34 to $10.10 filed events in the 5 days to 2026-07-16

No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.
2026-07-07 -10.5% $13.09 to $11.72 filed events in the 5 days to 2026-07-07

No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.
2026-06-24 -11.3% $14.12 to $12.52 filed events in the 5 days to 2026-06-24

No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.
2026-05-28 +21.5% $17.16 to $20.85 filed events in the 5 days to 2026-05-28
- 2026-05-26 Insider trade Open-market sale reported by an insider1 transaction · 1 insider · $320,253Source: SEC Form 4
- 2026-05-27 Insider trade Open-market sale reported by an insider3 transactions · 3 insiders · $136,499Source: SEC Form 4
2026-05-26 +11.2% $16.03 to $17.83 filed events in the 5 days to 2026-05-26
- 2026-05-21 Insider trade Open-market sale reported by an insider3 transactions · 3 insiders · $2,326,363Source: SEC Form 4
- 2026-05-26 Insider trade Open-market sale reported by an insider1 transaction · 1 insider · $320,253Source: SEC Form 4
2026-05-07 -27.4% $22.19 to $16.11 filed events in the 5 days to 2026-05-07
- 2026-05-06 Earnings Quarterly results reportedquarter ended 2026-03-31 · reported EPS USD -0.04 against an estimate of USD -0.01 · surprise -166.7%Source: SEC filing calendar + Yahoo earnings history
- 2026-05-06 Material event 8-K filed (material event)accession 0001899287-26-000037Source: SEC EDGAR
- 2026-05-07 Periodic filing 10-Q filedaccession 0001899287-26-000045Source: SEC EDGAR
2026-03-31 +14.5% $14.72 to $16.86 filed events in the 5 days to 2026-03-31

No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.
2026-03-05 +18.6% $12.55 to $14.89 filed events in the 5 days to 2026-03-05
- 2026-03-04 Earnings Quarterly results reportedquarter ended 2025-12-31 · reported EPS USD -0.01 against an estimate of USD -0.04 · surprise +73.7%Source: SEC filing calendar + Yahoo earnings history
- 2026-03-04 Material event 8-K filed (material event)accession 0001899287-26-000009Source: SEC EDGAR
2026-02-06 +15.7% $10.58 to $12.24 filed events in the 5 days to 2026-02-06

No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.
2026-02-05 -14.7% $12.40 to $10.58 filed events in the 5 days to 2026-02-05

No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.
2026-02-04 -15.5% $14.68 to $12.40 filed events in the 5 days to 2026-02-04

No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.
2026-02-03 +11.6% $13.15 to $14.68 filed events in the 5 days to 2026-02-03

No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.
2026-01-29 +13.4% $11.98 to $13.58 filed events in the 5 days to 2026-01-29

No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.
2026-01-02 +10.8% $7.89 to $8.74 filed events in the 5 days to 2026-01-02

No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.
2025-12-17 -14.6% $10.28 to $8.78 filed events in the 5 days to 2025-12-17

No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.
2025-11-07 +13.1% $11.26 to $12.73 filed events in the 5 days to 2025-11-07
- 2025-11-06 Earnings Quarterly results reportedquarter ended 2025-09-30 · reported EPS USD -0.03 against an estimate of USD -0.06 · surprise +47.8%Source: SEC filing calendar + Yahoo earnings history
- 2025-11-06 Periodic filing 10-Q filedaccession 0001628280-25-050308Source: SEC EDGAR
2025-11-06 -13.7% $13.04 to $11.26 filed events in the 5 days to 2025-11-06
- 2025-11-06 Earnings Quarterly results reportedquarter ended 2025-09-30 · reported EPS USD -0.03 against an estimate of USD -0.06 · surprise +47.8%Source: SEC filing calendar + Yahoo earnings history
- 2025-11-06 Periodic filing 10-Q filedaccession 0001628280-25-050308Source: SEC EDGAR
2025-11-04 -10.8% $13.56 to $12.10 filed events in the 5 days to 2025-11-04

No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.
2025-10-31 +14.7% $12.29 to $14.09 filed events in the 5 days to 2025-10-31

No filed event was recorded for this company in the 5 days ending on this session. That is what our sources hold, not a statement about what happened.

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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See the full company profile: AMPRIUS TECHNOLOGIES INC (AMPX).

Informational only — NOT financial advice. Price moves are computed from stored daily closes; filed events come from their own sources with their own dates.