SES AI Corporation Class A (SES)
SES moved a median of +0.16% 30 minutes after news, and -0.89% by the close. How SES actually reacts to news — the realized, point-in-time move the market made, measured across 930 labeled events over the last three years with zero look-ahead.
SES’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 47% | 929 |
| 30-min | +0.16% | 50% | 929 |
| 60-min | -0.05% | 47% | 929 |
| to close | -0.89% | 37% | 926 |
| Middle 50% of SES reactions | -1.99% to +2.28% |
|---|---|
| Median reaction (30-min) | +0.16% |
| Measured reactions | 930 |
Half of all SES AI Corporation Class A news events land between -1.99% and +2.28% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when SES moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to SES's baseline. Nothing else.
Recent SES events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Bronstein, Gewirtz & Grossman, LLC Encourages SES AI Corporation (SES) Stockholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | — | — | |
| Form PRE 14A SES AI Corp For: Dec 10 | SEC filing · Form PRE | SEC EDGAR | — | — | |
| SES AI Corporation (SES) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Shareholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | -0.31% | +15.17% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages SES AI Corporation (SES) Investors to Inquire about Securities Investigation | Press release | ACCESS Newswire | -2.99% | +4.32% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against SES AI Corporation (SES) And Encourages Stockholders to Reach Out | Press release | ACCESS Newswire | -0.04% | -1.29% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages SES AI Corporation (SES) Investors to Inquire about Securities Investigation | Press release | ACCESS Newswire | -0.39% | +2.69% | |
| SES AI’s Chungju Battery Facility Achieves ISO 9001:2015 Certification for Production of NDAA-Compliant Drone Cells | Press release | Business Wire | -1.24% | +0.02% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against SES AI Corporation (SES) And Encourages Stockholders to Reach Out | Press release | ACCESS Newswire | -0.09% | +4.17% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages SES AI Corporation (SES) Shareholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | +0.35% | +5.54% | |
| Bronstein, Gewirtz & Grossman, LLC Is Investigating SES AI Corporation (SES) And Encourages Shareholders to Connect | Press release | ACCESS Newswire | -0.12% | -3.42% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against SES AI Corporation (SES) And Encourages Shareholders to Reach Out | Press release | ACCESS Newswire | -0.29% | -1.17% | |
| SES AI Corporation (SES) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Shareholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | +0.62% | +4.51% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages SES AI Corporation (SES) Stockholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | -0.01% | +1.07% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against SES AI Corporation (SES) And Encourages Stockholders to Reach Out | Press release | ACCESS Newswire | +0.01% | -0.35% | |
| Bronstein, Gewirtz & Grossman, LLC Is Investigating SES AI Corporation (SES) And Encourages Stockholders to Connect | Press release | ACCESS Newswire | +0.01% | +0.81% | |
| Lifshitz Law PLLC Announces Investigations of SES AI Corporation (NYSE:SES), Globant S.A. (NYSE:GLOB), zSpace, Inc. (OTC:ZSPC), and Babcock & Wilcox Enterprises, Inc. (NYSE:BW) | Press release | ACCESS Newswire | -0.67% | +0.03% | |
| SES AI Corporation (SES) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Stockholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | -3.45% | +0.26% | |
| Form 8-K SES AI Corp For: Aug 13 | SEC filing · Form 8-K | SEC EDGAR | -1.39% | -3.85% | |
| SES AI Appoints Paul Diemer to Board of Directors | Press release | Business Wire | +3.28% | +2.98% | |
| SES AI’s UZ Energy Becomes Sol-Ark® Certified Battery Partner | Press release | Business Wire | +0.53% | +7.75% | |
| Form 10-Q SES AI Corp For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.53% | +7.75% | |
| Form 8-K SES AI Corp For: Aug 06 | SEC filing · Form 8-K | SEC EDGAR | +0.53% | +7.75% | |
| SES AI Reports Second Quarter 2026 Financial Results | Press release | Business Wire | +0.53% | +7.75% | |
| SES AI Enters into Framework Agreement with Doroni Aerospace to Design and Develop a Battery Pack for Doroni Aerospace’s H1-X Personal eVTOL | Press release | Business Wire | +1.79% | +5.41% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages SES AI Corporation (SES) Shareholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | +0.54% | +3.09% | |
| Bronstein, Gewirtz & Grossman, LLC Is Investigating SES AI Corporation (SES) And Encourages Shareholders to Connect | Press release | ACCESS Newswire | -0.06% | +3.50% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against SES AI Corporation (SES) And Encourages Shareholders to Reach Out | Press release | ACCESS Newswire | +3.88% | +8.90% | |
| SES AI Corporation (SES) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Shareholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | +0.47% | +0.33% | |
| Form 8-K SES AI Corp For: Jul 17 | SEC filing · Form 8-K | SEC EDGAR | +2.26% | -8.34% | |
| SES AI Announces Date of Conference Call for Second Quarter 2026 Results | Press release | Business Wire | +2.42% | +6.64% | |
| SES AI Receives Continued Listing Standard Notice from NYSE | Press release | Business Wire | +2.26% | -8.34% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages SES AI Corporation (SES) Stockholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | -0.27% | -3.81% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against SES AI Corporation (SES) and Encourages Stockholders to Learn More About the Investigation | Press release | ACCESS Newswire | -1.70% | -7.78% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages SES AI Corporation (SES) Investors to Inquire about Securities Investigation | Press release | ACCESS Newswire | -0.06% | -1.83% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against SES AI Corporation (SES) And Encourages Stockholders to Reach Out | Press release | ACCESS Newswire | -0.06% | +0.02% | |
| Bronstein, Gewirtz & Grossman, LLC Is Investigating SES AI Corporation (SES) And Encourages Stockholders to Connect | Press release | ACCESS Newswire | -1.59% | -4.16% | |
| SES AI Announces Inclusion in Russell 3000®Index | Press release | Business Wire | +1.41% | +3.87% | |
| SES AI Corporation Sued for Securities Law Violations - Contact the DJS Law Group to Discuss Your Rights - SES | Press release | PR Newswire | +1.41% | +3.87% | |
| SES AI Corporation Sued for Securities Law Violations - Contact the DJS Law Group to Discuss Your Rights - SES | Press release | PR Newswire | -5.06% | -8.30% | |
| SES AI Corporation Sued for Securities Law Violations - Contact the DJS Law Group to Discuss Your Rights - SES | Press release | PR Newswire | -1.35% | -5.41% | |
| SES AI Corporation Sued for Securities Law Violations - Contact the DJS Law Group to Discuss Your Rights - SES | Press release | PR Newswire | +1.81% | -0.89% | |
| SES AI Corporation Sued for Securities Law Violations - Contact the DJS Law Group to Discuss Your Rights - SES | Press release | PR Newswire | +0.94% | +0.00% | |
| SES AI Corporation Sued for Securities Law Violations - Contact the DJS Law Group to Discuss Your Rights - SES | Press release | PR Newswire | -2.12% | -5.08% | |
| SES AI Corporation Sued for Securities Law Violations - Contact the DJS Law Group to Discuss Your Rights - SES | Press release | PR Newswire | -3.46% | -9.23% | |
| SES AI Corporation Sued for Securities Law Violations - Contact the DJS Law Group to Discuss Your Rights - SES | Press release | PR Newswire | +3.87% | +3.91% | |
| SES AI Corporation Sued for Securities Law Violations - Contact the DJS Law Group to Discuss Your Rights - SES | Press release | PR Newswire | +8.55% | +7.81% | |
| Shareholders who lost money in SES AI Corporation (NYSE: SES) Should Contact Wolf Haldenstein Immediately | Press release | PR Newswire | -0.01% | +0.00% | |
| Shareholders who lost money in SES AI Corporation (NYSE: SES) Should Contact Wolf Haldenstein Immediately | Press release | GlobeNewswire | -1.36% | +0.99% | |
| SES AI Corporation Sued for Securities Law Violations - Contact the DJS Law Group to Discuss Your Rights - SES | Press release | PR Newswire | -1.36% | -0.89% | |
| Shareholders who lost money in SES AI Corporation (NYSE: SES) Should Contact Wolf Haldenstein Immediately | Press release | PR Newswire | -2.65% | -7.96% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the SES section they belong to.
Where else SES is measured.
SES earnings → · Analyst actions → · SEC filings →
Other Basic Materials names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| USG (USG) | 971 | 0.00% | 49% |
| ANGLO AMERICAN S/ADR (NGLOY) | 940 | 0.00% | 43% |
| Turquoise Hill Resources Ltd. Ordinary Shares (TRQ) | 916 | -0.23% | 40% |
| Dundee Precious Metals Inc (DPM_TSE) | 913 | -0.10% | 39% |
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 Basic Materials names, measured the same way →
Every ticker we measure the same way24
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Every name we’ve measured, in one place.
How the numbers are made.
How is SES AI Corporation Class A's median reaction calculated?
Every labeled SES 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 930 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 SES'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 SES'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.