Amprius Technologies, Inc. (AMPX)
AMPX moved a median of +0.02% 30 minutes after news, and -0.90% by the close. How AMPX actually reacts to news — the realized, point-in-time move the market made, measured across 360 labeled events over the last three years with zero look-ahead.
AMPX’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | -0.36% | 40% | 360 |
| 30-min | +0.02% | 50% | 360 |
| 60-min | -0.28% | 46% | 360 |
| to close | -0.90% | 44% | 360 |
| Middle 50% of AMPX reactions | -2.86% to +2.42% |
|---|---|
| Median reaction (30-min) | +0.02% |
| Measured reactions | 360 |
Half of all Amprius Technologies, Inc. news events land between -2.86% and +2.42% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How AMPX reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Coverage initiations | 26 | -0.73% | 35% | -1.00% |
| Rating reiterations | 42 | +0.60% | 62% | -0.20% |
Last 3 years, pulled 2026-09-21. Reaction = percent move vs. the price at the news timestamp. Counts and medians only. The same measurement runs across every name in the dataset. 4 further classes were observed with fewer than 10 measured events and are not published. See how AMPX ranks against every other measured name →
That’s how AMPX usually reacts — get an email when it moves on news →Email me when AMPX moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to AMPX's baseline. Nothing else.
Recent AMPX events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form S-3ASR Amprius Technologies, | SEC filing · Form S-3ASR | SEC EDGAR | -1.92% | -5.64% | |
| CAMINUS Signs Contract Manufacturing Agreement with Amprius Technologies for U.S. Pouch Cell Production | Press release | PR Newswire | -2.12% | -3.77% | |
| Amprius Secures $75 Million Grant for American High-Energy Density Battery Production | Press release | Business Wire | -4.73% | -13.98% | |
| Amprius Introduces SiCore®500 – High Energy Density Cells for Unmanned Aviation | Press release | Business Wire | -0.12% | -0.52% | |
| Amprius Sets September 2026 Events Schedule | Press release | Business Wire | +0.83% | -1.15% | |
| Amprius Technologies Reports Second Quarter 2026 Financial Results and Recent Business Highlights | Press release | Business Wire | -3.72% | -5.18% | |
| Amprius Technologies Sets Upcoming Conference Schedule | Press release | Business Wire | +1.14% | +5.93% | |
| Amprius Technologies Announces Date for Second Quarter 2026 Results and Business Updates | Press release | Business Wire | +2.86% | +1.25% | |
| Amprius Sets June 2026 Events Schedule | Press release | Business Wire | -0.06% | +5.68% | |
| Amprius and Matternet Partner to Advance Drone Delivery | Press release | Business Wire | -1.29% | -0.45% | |
| Amprius Technologies Announces the Pricing of its Previously Announced Exchange of Public Warrants for Common Stock | Press release | Business Wire | -1.04% | -2.71% | |
| Amprius Technologies to Simplify Capital Structure Through Exchange of Public Warrants for Common Stock | Press release | Business Wire | -2.20% | -11.24% | |
| Amprius Technologies Reports First Quarter 2026 Financial Results and Recent Business Highlights | Press release | Business Wire | -2.20% | -11.24% | |
| Defiance Launches AMPU: The First Daily 2X Long ETF for Amprius Technologies, Inc. | Press release | GlobeNewswire | -0.38% | +4.92% | |
| Amprius Sets May 2026 Events Schedule | Press release | Business Wire | -1.99% | -1.18% | |
| Amprius Technologies Announces Date for First Quarter 2026 Results and Business Updates | Press release | Business Wire | +1.35% | +6.83% | |
| Amprius Recognized by TIME as One of America’s Top GreenTech Companies for 2026 | Press release | Business Wire | +0.69% | -1.32% | |
| Amprius Secures $21 Million Purchase Order for Electric Two and Three-Wheelers | Press release | Business Wire | -0.83% | -0.94% | |
| Form 10-K Amprius Technologies, For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +1.41% | +8.51% | |
| Form S-8 Amprius Technologies, | SEC filing · Form S-8 | SEC EDGAR | +1.41% | +8.51% | |
| Amprius Technologies Reports Fourth Quarter and Fiscal Year 2025 Financial Results and Recent Business Highlights | Press release | Business Wire | +8.76% | +10.54% | |
| Form 8-K Amprius Technologies, For: Mar 04 | SEC filing · Form 8-K | SEC EDGAR | +8.76% | +10.54% | |
| Amprius Sets March 2026 Events Schedule | Press release | Business Wire | +3.25% | +4.87% | |
| Amprius Technologies Announces Date for Fourth Quarter and Full Year 2025 Results and Business Updates | Press release | Business Wire | +0.01% | +8.60% | |
| Amprius Secures Strategic U.S.-Based Manufacturing Partner to Scale Domestic Silicon Anode Battery Production | Press release | Business Wire | +2.66% | +5.61% | |
| Form 8-K Amprius Technologies, For: Jan 30 | SEC filing · Form 8-K | SEC EDGAR | +2.66% | +5.61% | |
| Amprius Sets February 2026 Events Schedule | Press release | Business Wire | +4.16% | +6.22% | |
| Amprius Technologies Announces Completion and Termination of At-The-Market Equity Offering Program | Press release | Business Wire | +0.82% | +2.46% | |
| Form 8-K Amprius Technologies, For: Jan 12 | SEC filing · Form 8-K | SEC EDGAR | +0.82% | +2.46% | |
| CES Recognizes Amprius with an Innovation Award | Press release | Business Wire | -0.73% | +3.20% | |
| Amprius Technologies Announces CEO Transition | Press release | Business Wire | -1.36% | -1.31% | |
| Form 8-K Amprius Technologies, For: Dec 18 | SEC filing · Form 8-K | SEC EDGAR | -1.36% | -1.31% | |
| Amprius Expands Korea Battery Alliance with Three New Contract Manufacturers | Press release | Business Wire | -1.23% | -8.64% | |
| Amprius Sets December 2025 Events Schedule | Press release | Business Wire | +0.26% | +7.76% | |
| Nokia Drone Networks Integrates Amprius SiCore® Batteries to Advance High-Reliability Operations | Press release | Business Wire | +0.97% | +0.28% | |
| Amprius Strengthens Global Partnerships with Launch of the Amprius Korea Battery Alliance | Press release | Business Wire | +1.34% | -7.75% | |
| Amprius Technologies Reports Third Quarter 2025 Business and Financial Results | Press release | Business Wire | -3.56% | +7.88% | |
| Form 10-Q Amprius Technologies, For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | -3.56% | +7.88% | |
| Form 8-K Amprius Technologies, For: Nov 06 | SEC filing · Form 8-K | SEC EDGAR | -3.56% | +7.88% | |
| Amprius Technologies Announces Date for Third Quarter 2025 Results and Business Updates | Press release | Business Wire | -0.26% | +1.75% | |
| Amprius’ High-Power Silicon Batteries Selected by ESAero to Power Next-Generation UAVs | Press release | Business Wire | -3.71% | +6.86% | |
| Amprius Technologies Appoints Ricardo C. Rodriguez as Chief Financial Officer | Press release | Business Wire | -0.61% | +1.74% | |
| Form 8-K Amprius Technologies, For: Oct 06 | SEC filing · Form 8-K | SEC EDGAR | -0.61% | +1.74% | |
| Amprius Sets October 2025 Events Schedule | Press release | Business Wire | -0.76% | +14.88% | |
| Amprius Secures Repeat $35 Million Purchase Order from Leading UAS Manufacturer | Press release | Business Wire | -1.55% | -0.36% | |
| Amprius Sets September 2025 Events Schedule | Press release | Business Wire | +1.03% | +7.33% | |
| Form 8-K Amprius Technologies, For: Sep 02 | SEC filing · Form 8-K | SEC EDGAR | +0.81% | -3.93% | |
| Leading European Drone Manufacturer Nordic Wing Selects Amprius to Increase Flight Endurance | Press release | Business Wire | +0.81% | -3.93% | |
| Amprius Technologies Reports Second Quarter 2025 Business and Financial Results | Press release | Business Wire | +5.70% | -7.25% | |
| Form 10-Q Amprius Technologies, For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +5.70% | -7.25% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the AMPX section they belong to.
Where else AMPX is measured.
AMPX earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is Amprius Technologies, Inc.'s median reaction calculated?
Every labeled AMPX news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 360 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 50% of AMPX's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does AMPX's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.