Stem, Inc. Class A (STEM)
STEM moved a median of 0.00% 30 minutes after news, and -1.34% by the close. How STEM actually reacts to news — the realized, point-in-time move the market made, measured across 451 labeled events over the last three years with zero look-ahead.
STEM’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | +0.05% | 51% | 451 |
| 30-min | 0.00% | 49% | 451 |
| 60-min | +0.05% | 50% | 451 |
| to close | -1.34% | 40% | 445 |
| Middle 50% of STEM reactions | -1.90% to +1.85% |
|---|---|
| Median reaction (30-min) | 0.00% |
| Measured reactions | 451 |
Half of all Stem, Inc. Class A news events land between -1.90% and +1.85% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How STEM reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst downgrades | 19 | +4.42% | 95% | +2.73% |
| Rating reiterations | 50 | +0.11% | 50% | +0.32% |
| Price-target cuts | 27 | +0.37% | 59% | +1.68% |
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. 3 further classes were observed with fewer than 10 measured events and are not published. See how STEM ranks against every other measured name →
That’s how STEM usually reacts — get an email when it moves on news →Email me when STEM moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to STEM's baseline. Nothing else.
Recent STEM events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Stem Announces Third Quarter 2026 Earnings Results Conference Call | Press release | Business Wire | -0.78% | -7.24% | |
| Form 10-Q STEM, INC. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +19.65% | +8.52% | |
| Form S-8 STEM, INC. | SEC filing · Form S-8 | SEC EDGAR | +0.88% | +1.44% | |
| Form 8-K STEM, INC. For: Aug 12 | SEC filing · Form 8-K | SEC EDGAR | +19.65% | +8.52% | |
| Stem Announces Second Quarter 2026 Results | Press release | Business Wire | +19.65% | +8.52% | |
| Stem's PowerTrack EMS Enables Hybridization of Two Operating Utility-Scale Solar Plants in Hungary | Press release | Business Wire | +19.65% | +8.52% | |
| Stem Announces Second Quarter 2026 Earnings Results Conference Call | Press release | Business Wire | -1.22% | -3.84% | |
| Stem Wins The smarter E AWARD 2026 for PowerTrack Energy Management System | Press release | Business Wire | +2.11% | +1.67% | |
| Stem Launches AIONA, a Dedicated AI Services Offering Built for Operational Impact | Press release | Business Wire | +1.34% | -1.79% | |
| Form EFFECT STEM, INC. | SEC filing · Form EFFECT | SEC EDGAR | +1.09% | +2.85% | |
| Form 8-K STEM, INC. For: Jun 03 | SEC filing · Form 8-K | SEC EDGAR | -0.28% | +2.23% | |
| Form S-3 STEM, INC. | SEC filing · Form S-3 | SEC EDGAR | -1.74% | -7.38% | |
| Form SD STEM, INC. | SEC filing · Form SD | SEC EDGAR | -1.17% | -1.28% | |
| Stem Brings PowerTrack EMS to Latin America’s Utility-Scale Hybrid Market with Granja Solar Project in Chile | Press release | Business Wire | -3.81% | -2.38% | |
| Bluesphere Ventures Selects Stem for New York VDER Storage Advisory | Press release | Business Wire | +2.13% | +0.90% | |
| Form 10-Q STEM, INC. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +2.88% | +0.46% | |
| Form 8-K STEM, INC. For: May 06 | SEC filing · Form 8-K | SEC EDGAR | +2.88% | +0.46% | |
| Stem Announces First Quarter 2026 Results | Press release | Business Wire | +2.88% | +0.46% | |
| Stem and Nuvation Energy Enter into Agreement to Deliver North American-Made BESS Control Solution | Press release | Business Wire | +0.57% | +2.49% | |
| Stem Acquires raicoon to Expand PowerTrack Capabilities | Press release | Business Wire | -1.10% | -2.92% | |
| Form DEFA14A STEM, INC. | SEC filing · Form DEFA14A | SEC EDGAR | +0.51% | -4.48% | |
| Form ARS STEM, INC. For: Apr 24 | SEC filing · Form ARS | SEC EDGAR | +0.51% | -4.48% | |
| Form DEF 14A STEM, INC. For: Apr 24 | SEC filing · Form DEF | SEC EDGAR | +0.51% | -4.48% | |
| Stem Announces First Quarter 2026 Earnings Results Conference Call | Press release | Business Wire | +3.05% | +3.50% | |
| Form 8-K STEM, INC. For: Mar 12 | SEC filing · Form 8-K | SEC EDGAR | +0.94% | -0.66% | |
| Form 10-K STEM, INC. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +0.08% | +1.50% | |
| Form 8-K STEM, INC. For: Mar 04 | SEC filing · Form 8-K | SEC EDGAR | +0.08% | +1.50% | |
| Stem Announces Fourth Quarter and Full Year 2025 Results | Press release | Business Wire | +0.08% | +1.50% | |
| Stem’s PowerTrack™ EMS Selected for 100 MWh of Utility-Scale Energy Storage Projects in Germany | Press release | Business Wire | +1.01% | +0.50% | |
| Form D Fig STEM, Inc. | SEC filing · Form D | SEC EDGAR | -1.56% | -1.56% | |
| Stem Announces Fourth Quarter and Full Year 2025 Earnings Results Conference Call | Press release | Business Wire | -0.57% | -3.90% | |
| Form 8-K STEM, INC. For: Dec 17 | SEC filing · Form 8-K | SEC EDGAR | +5.34% | +0.48% | |
| Form 8-K STEM, INC. For: Dec 11 | SEC filing · Form 8-K | SEC EDGAR | +1.79% | -8.40% | |
| Form EFFECT STEM, INC. | SEC filing · Form EFFECT | SEC EDGAR | -0.60% | -12.55% | |
| Stem Partners with Clean Energy Asset Owner to Operate and Optimize Energy Storage Portfolio for Southern California Utility | Press release | Business Wire | +0.75% | +0.71% | |
| Form 8-K STEM, INC. For: Dec 01 | SEC filing · Form 8-K | SEC EDGAR | -1.51% | +0.23% | |
| Stem Board of Directors Appoints CEO Arun Narayanan to Board | Press release | Business Wire | -1.51% | +0.23% | |
| Form S-3 STEM, INC. | SEC filing · Form S-3 | SEC EDGAR | -0.71% | +2.73% | |
| Form 10-Q STEM, INC. For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.47% | -20.13% | |
| Form 8-K STEM, INC. For: Oct 29 | SEC filing · Form 8-K | SEC EDGAR | -0.47% | -20.13% | |
| Stem Announces Third Quarter 2025 Results | Press release | Business Wire | -0.47% | -20.13% | |
| Form 8-K STEM, INC. For: Oct 15 | SEC filing · Form 8-K | SEC EDGAR | +0.97% | -8.12% | |
| Stem Expands its European Operations as Demand Surges for Solar, Storage and Hybrid Energy Solutions | Press release | Business Wire | -2.48% | +19.65% | |
| Stem Announces Third Quarter 2025 Results Conference Call | Press release | Business Wire | -0.42% | +7.02% | |
| Form 8-K STEM, INC. For: Sep 09 | SEC filing · Form 8-K | SEC EDGAR | +0.18% | +1.61% | |
| Form EFFECT STEM, INC. | SEC filing · Form EFFECT | SEC EDGAR | +0.18% | +1.61% | |
| Stem, Inc. Letter to Shareholders – Reflecting on our journey of strategic realignment | Press release | Business Wire | +0.18% | +1.61% | |
| Stem Unveils PowerTrack™ Optimizer: Flagship Enterprise Platform Powering Managed Services Strategically Rebranded to Integrate into Comprehensive Product Stack | Press release | Business Wire | -1.18% | -2.10% | |
| Form S-3 STEM, INC. | SEC filing · Form S-3 | SEC EDGAR | -0.10% | +0.35% | |
| Stem Launches PowerTrack™ EMS, Expanding Global Product Suite for Standalone and Hybrid Energy Storage Control | Press release | Business Wire | +0.06% | +0.47% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the STEM section they belong to.
Where else STEM is measured.
STEM earnings → · Analyst actions → · SEC filings →
Every ticker we measure the same way24
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Exxon Mobil (XOM)
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Costco (COST)
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Mastercard (MA)
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Oracle (ORCL)
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Salesforce (CRM)
How CRM actually reacts to news, measured.
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Browse all tickers
Every name we’ve measured, in one place.
How the numbers are made.
How is Stem, Inc. Class A's median reaction calculated?
Every labeled STEM 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 451 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. 49% of STEM'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 STEM'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.