Ambarella, Inc. - Ordinary Shares (AMBA)
AMBA moved a median of +0.06% 30 minutes after news, and -0.52% by the close. How AMBA actually reacts to news — the realized, point-in-time move the market made, measured across 372 labeled events over the last three years with zero look-ahead.
AMBA’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | -0.07% | 44% | 365 |
| 30-min | +0.06% | 51% | 367 |
| 60-min | -0.06% | 47% | 367 |
| to close | -0.52% | 40% | 367 |
| Middle 50% of AMBA reactions | -0.79% to +0.67% |
|---|---|
| Median reaction (30-min) | +0.06% |
| Measured reactions | 372 |
Half of all Ambarella, Inc. - Ordinary Shares news events land between -0.79% and +0.67% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How AMBA reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 15 | +0.57% | 60% | +1.44% |
| Rating reiterations | 102 | -1.12% | 29% | -1.58% |
| Price-target raises | 28 | -1.68% | 43% | -2.54% |
| Price-target cuts | 12 | -0.60% | 25% | -0.60% |
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. 1 further class was observed with fewer than 10 measured events and is not published. See how AMBA ranks against every other measured name →
That’s how AMBA usually reacts — get an email when it moves on news →Email me when AMBA moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to AMBA's baseline. Nothing else.
Recent AMBA events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Ambarella and Ultralytics Collaborate to Bring Ultralytics YOLO Models to CVflow-Powered Edge Devices | Press release | GlobeNewswire | +1.67% | -1.21% | |
| Ambarella and ZEDEDA Partner to Bring Cloud-Orchestrated AI to Billions of Devices at the Physical Edge | Press release | GlobeNewswire | +1.67% | -1.21% | |
| Ambarella Expands its Developer Zone with Remote Access to Live Silicon and Agentic AI Development on Google Cloud Platform | Press release | GlobeNewswire | +1.67% | -1.21% | |
| Ambarella Launches X7, Its First Standalone AI Accelerator, to Add Physical AI to Any Host Processor | Press release | GlobeNewswire | +1.67% | -1.21% | |
| Form 10-Q AMBARELLA INC For: Jul 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.16% | -1.25% | |
| Ambarella and Macnica Enter a Long-Term Strategic Distribution Agreement to Accelerate Edge AI Infrastructure and Physical AI Adoption | Press release | GlobeNewswire | -4.75% | -0.46% | |
| Ambarella Engages Capgemini to Help Accelerate Enterprise Adoption of Edge and Physical AI | Press release | GlobeNewswire | -4.75% | -0.46% | |
| Ambarella, Inc. Announces Second Quarter Fiscal Year 2027 Financial Results | Press release | GlobeNewswire | -4.75% | -0.46% | |
| Form 8-K AMBARELLA INC For: Sep 03 | SEC filing · Form 8-K | SEC EDGAR | -4.75% | -0.46% | |
| Ambarella Announces Second Quarter Fiscal Year 2027 Earnings Conference Call to be Held September 3, 2026 | Press release | GlobeNewswire | -0.85% | -1.39% | |
| Form S-8 AMBARELLA INC | SEC filing · Form S-8 | SEC EDGAR | +2.27% | -0.18% | |
| Form 8-K AMBARELLA INC For: Jun 26 | SEC filing · Form 8-K | SEC EDGAR | -0.11% | -11.06% | |
| Form DEFA14A AMBARELLA INC | SEC filing · Form DEFA14A | SEC EDGAR | -1.67% | -4.67% | |
| Form 10-Q AMBARELLA INC For: Apr 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.42% | +1.53% | |
| Form SD AMBARELLA INC | SEC filing · Form SD | SEC EDGAR | +4.87% | +3.81% | |
| Ambarella, Inc. Announces First Quarter Fiscal Year 2027 Financial Results | Press release | GlobeNewswire | -8.17% | -12.39% | |
| Form 8-K AMBARELLA INC For: May 28 | SEC filing · Form 8-K | SEC EDGAR | -8.17% | -12.39% | |
| Hanwha and Ambarella Enter Into Long-Term Edge AI Agreement | Press release | GlobeNewswire | -8.17% | -12.39% | |
| Ambarella Announces Inaugural Quarterly Briefing Call Targeting Non-Financial Industry Research Analysts | Press release | GlobeNewswire | +1.38% | +0.31% | |
| Form ARS AMBARELLA INC For: Jan 31 | SEC filing · Form ARS | SEC EDGAR | -1.41% | -3.76% | |
| Form DEF 14A AMBARELLA INC For: Jun 26 | SEC filing · Form DEF | SEC EDGAR | -1.41% | -3.76% | |
| Form DEFA14A AMBARELLA INC | SEC filing · Form DEFA14A | SEC EDGAR | -1.41% | -3.76% | |
| IEEE Awards Fermi Wang, with Inaugural 2026 Arun N. Netravali Video Analytics, Technology and Systems Award | Press release | GlobeNewswire | -1.78% | -0.81% | |
| Ambarella Announces First Quarter Fiscal Year 2027 Earnings Conference Call to be Held May 28, 2026 | Press release | GlobeNewswire | -1.10% | -1.49% | |
| Form 10-K AMBARELLA INC For: Jan 31 | SEC filing · Form 10-K | SEC EDGAR | — | -1.10% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against Ambarella, Inc. (AMBA) and Encourages Shareholders to Learn More About the Investigation | Press release | ACCESS Newswire | -0.08% | +0.08% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Ambarella, Inc. (AMBA) Shareholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | +0.58% | -1.30% | |
| Bronstein, Gewirtz & Grossman, LLC Is Investigating Ambarella, Inc. (AMBA) And Encourages Shareholders to Connect | Press release | ACCESS Newswire | +0.10% | +0.10% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Ambarella, Inc. (AMBA) Stockholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | -0.56% | -1.28% | |
| Ambarella, Inc. (AMBA) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Shareholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | -0.11% | -1.37% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Ambarella, Inc. (AMBA) Stockholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | +0.71% | +4.64% | |
| Ambarella, Inc. (AMBA) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Stockholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | +0.36% | -2.67% | |
| NOTICE TO DISREGARD -- BRONSTEIN, GEWIRTZ & GROSSMAN, LLC | Press release | GlobeNewswire | +0.19% | -1.99% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against Ambarella, Inc. (AMBA) and Encourages Stockholders to Learn More About the Investigation | Press release | ACCESS Newswire | -0.43% | -1.97% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Ambarella, Inc. (AMBA) Investors to Inquire about Securities Investigation | Press release | ACCESS Newswire | -0.18% | -2.85% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against Ambarella, Inc. (AMBA) And Encourages Stockholders to Reach Out | Press release | ACCESS Newswire | +0.48% | +0.25% | |
| Form 8-K AMBARELLA INC For: Feb 23 | SEC filing · Form 8-K | SEC EDGAR | +3.25% | +7.07% | |
| Ambarella, Inc. Announces Fourth Quarter and Fiscal Year 2026 Financial Results | Press release | GlobeNewswire | -0.38% | +0.57% | |
| Form 8-K AMBARELLA INC For: Feb 23 | SEC filing · Form 8-K | SEC EDGAR | -0.38% | +0.57% | |
| Ambarella to Showcase “The Ambarella Edge: From Agentic to Physical AI” at Embedded World 2026 | Press release | GlobeNewswire | -1.41% | +3.57% | |
| Ambarella Announces Fourth Quarter and Fiscal Year 2026 Earnings Conference Call to be Held February 26, 2026 | Press release | GlobeNewswire | +0.37% | +4.16% | |
| Ambarella Launches a Developer Zone to Broaden its Edge AI Ecosystem | Press release | GlobeNewswire | +0.75% | +3.82% | |
| Ambarella Launches Powerful Edge AI 8K Vision SoC With Industry-Leading AI and Multi-Sensor Perception Performance | Press release | GlobeNewswire | +0.68% | +0.60% | |
| Ambarella Announces CES 2026 Product and Technology Briefing Webcast on January 6, 2026 | Press release | GlobeNewswire | +1.10% | +3.20% | |
| Ambarella Accelerates Edge AI Innovation for Next Generation of Drones; Antigravity Deploys Ambarella’s CV5 AI SoC in Antigravity A1 Drone | Press release | GlobeNewswire | -0.68% | -0.93% | |
| Form 10-Q AMBARELLA INC For: Oct 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.32% | +0.98% | |
| Ambarella, Inc. Announces Third Quarter Fiscal Year 2026 Financial Results | Press release | GlobeNewswire | -5.57% | -6.47% | |
| Form 8-K AMBARELLA INC For: Nov 24 | SEC filing · Form 8-K | SEC EDGAR | -5.57% | -6.47% | |
| Ambarella Announces Third Quarter Fiscal Year 2026 Earnings Conference Call to be Held November 25, 2025 | Press release | GlobeNewswire | +0.63% | +2.25% | |
| Form 10-Q AMBARELLA INC For: Jul 31 | SEC filing · Form 10-Q | SEC EDGAR | — | +1.04% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the AMBA section they belong to.
Where else AMBA is measured.
AMBA earnings → · Analyst actions → · SEC filings →
Other Technology names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Dolphin Entertainment, Inc. (DLPN) | 374 | 0.00% | 34% |
| Gilat Satellite Networks Ltd. - Ordinary Shares (GILT) | 374 | +0.00% | 50% |
| Intelligent Systems Corporation (INS) | 369 | 0.00% | 44% |
| ePlus inc. (PLUS) | 369 | +0.13% | 56% |
Same sector, same measurement: percent move vs. the price at the news timestamp, read at 30 minutes. Sample sizes differ, so the medians are comparable but the confidence behind them is not.
All Technology names, measured the same way →
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Every name we’ve measured, in one place.
How the numbers are made.
How is Ambarella, Inc. - Ordinary Shares's median reaction calculated?
Every labeled AMBA 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 372 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. 51% of AMBA'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 AMBA'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.