ON Semiconductor Corporation (ON)
ON moved a median of +0.04% 30 minutes after news, and -0.02% by the close. How ON actually reacts to news — the realized, point-in-time move the market made, measured across 819 labeled events over the last three years with zero look-ahead.
ON’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | +0.02% | 50% | 816 |
| 30-min | +0.04% | 52% | 816 |
| 60-min | 0.00% | 50% | 817 |
| to close | -0.02% | 49% | 817 |
| Middle 50% of ON reactions | -0.65% to +0.51% |
|---|---|
| Median reaction (30-min) | +0.04% |
| Measured reactions | 819 |
Half of all ON Semiconductor Corporation news events land between -0.65% and +0.51% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How ON reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 15 | -0.28% | 47% | +0.95% |
| Analyst downgrades | 40 | +0.45% | 65% | -0.42% |
| Coverage initiations | 27 | +0.81% | 85% | +0.88% |
| Rating reiterations | 246 | -0.04% | 48% | +0.18% |
| Price-target raises | 52 | -0.06% | 46% | -0.14% |
| Price-target cuts | 84 | +0.10% | 52% | -0.17% |
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. See how ON ranks against every other measured name →
That’s how ON usually reacts — get an email when it moves on news →Email me when ON moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to ON's baseline. Nothing else.
Recent ON events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form RW ON SEMICONDUCTOR CORP | SEC filing · Form RW | SEC EDGAR | +1.24% | +0.81% | |
| Form 8-K ON SEMICONDUCTOR CORP For: Oct 01 | SEC filing · Form 8-K | SEC EDGAR | +1.24% | +0.81% | |
| Form DEFA14A ON SEMICONDUCTOR CORP | SEC filing · Form DEFA14A | SEC EDGAR | +1.24% | +0.81% | |
| onsemi and Synaptics Announce Revised Merger Agreement | Press release | GlobeNewswire | +1.24% | +0.81% | |
| onsemi Charts Path to Power the Next Decade of Innovation | Press release | GlobeNewswire | -1.50% | -7.24% | |
| Subaru to Evaluate onsemi's Embedded Power Platform for Future EVs | Press release | GlobeNewswire | -1.57% | -7.24% | |
| Form S-4 ON SEMICONDUCTOR CORP | SEC filing · Form S-4 | SEC EDGAR | -0.39% | -1.45% | |
| Form 8-K ON SEMICONDUCTOR CORP For: Aug 12 | SEC filing · Form 8-K | SEC EDGAR | +1.30% | -1.59% | |
| Form 10-Q ON SEMICONDUCTOR CORP For: Jul 03 | SEC filing · Form 10-Q | SEC EDGAR | -1.70% | -4.06% | |
| Form 8-K ON SEMICONDUCTOR CORP For: Aug 03 | SEC filing · Form 8-K | SEC EDGAR | -1.70% | -4.06% | |
| onsemi Reports Second Quarter 2026 Results | Press release | GlobeNewswire | -1.70% | -4.06% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against ON Semiconductor Corporation (ON) and Encourages Shareholders to Learn More About the Investigation | Press release | ACCESS Newswire | -0.34% | +0.85% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages ON Semiconductor Corporation (ON) Shareholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | -0.17% | +0.12% | |
| Bronstein, Gewirtz & Grossman, LLC Is Investigating ON Semiconductor Corporation (ON) And Encourages Shareholders to Connect | Press release | ACCESS Newswire | +0.89% | +0.76% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages ON Semiconductor Corporation (ON) Stockholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | -0.60% | -2.64% | |
| ON Semiconductor Corporation (ON) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Shareholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | +0.36% | -3.94% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against ON Semiconductor Corporation (ON) and Encourages Stockholders to Learn More About the Investigation | Press release | ACCESS Newswire | -0.50% | +1.72% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages ON Semiconductor Corporation (ON) Investors to Inquire about Securities Investigation | Press release | ACCESS Newswire | +0.14% | -3.25% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against ON Semiconductor Corporation (ON) And Encourages Stockholders to Reach Out | Press release | ACCESS Newswire | +2.42% | +1.79% | |
| Form 8-K ON SEMICONDUCTOR CORP For: Jun 25 | SEC filing · Form 8-K | SEC EDGAR | -1.97% | -7.37% | |
| onsemi Introduces Industry-First Elite Pairing Studio to Simplify Power Design | Press release | GlobeNewswire | -1.22% | -1.36% | |
| Leverage Shares by Themes Targets Semiconductor Demand, Adding ON and NXPI to Leveraged Singe Stock ETF Lineup | Press release | GlobeNewswire | +0.49% | +2.76% | |
| Form 8-K ON SEMICONDUCTOR CORP For: May 14 | SEC filing · Form 8-K | SEC EDGAR | +1.76% | +0.33% | |
| Form SD ON SEMICONDUCTOR CORP | SEC filing · Form SD | SEC EDGAR | +1.76% | +0.33% | |
| Form 8-K ON SEMICONDUCTOR CORP For: May 06 | SEC filing · Form 8-K | SEC EDGAR | -1.36% | -0.29% | |
| Form 8-K ON SEMICONDUCTOR CORP For: May 06 | SEC filing · Form 8-K | SEC EDGAR | -0.50% | -4.18% | |
| Form 8-K ON SEMICONDUCTOR CORP For: May 06 | SEC filing · Form 8-K | SEC EDGAR | -1.16% | +2.71% | |
| Form 10-Q ON SEMICONDUCTOR CORP For: Apr 03 | SEC filing · Form 10-Q | SEC EDGAR | +0.06% | +5.08% | |
| Form 8-K ON SEMICONDUCTOR CORP For: May 04 | SEC filing · Form 8-K | SEC EDGAR | +0.06% | +5.08% | |
| onsemi Reports First Quarter 2026 Results | Press release | GlobeNewswire | +0.06% | +5.08% | |
| onsemi and NIO Expand Strategic Collaboration to Accelerate Next-Generation 900V EV Platforms | Press release | GlobeNewswire | +0.12% | -0.51% | |
| onsemi to Announce First Quarter Financial Results | Press release | GlobeNewswire | +0.09% | +3.32% | |
| Form ARS ON SEMICONDUCTOR CORP For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +0.60% | +4.14% | |
| Form DEF 14A ON SEMICONDUCTOR CORP For: May 14 | SEC filing · Form DEF | SEC EDGAR | +0.60% | +4.14% | |
| Form DEFA14A ON SEMICONDUCTOR CORP | SEC filing · Form DEFA14A | SEC EDGAR | +0.60% | +4.14% | |
| Form 8-K ON SEMICONDUCTOR CORP For: Mar 09 | SEC filing · Form 8-K | SEC EDGAR | +0.72% | -0.92% | |
| Form 10-K ON SEMICONDUCTOR CORP For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +2.37% | +3.82% | |
| Form 8-K ON SEMICONDUCTOR CORP For: Feb 09 | SEC filing · Form 8-K | SEC EDGAR | +2.37% | +3.82% | |
| onsemi Reports Fourth Quarter and Full Year 2025 Results | Press release | GlobeNewswire | +2.37% | +3.82% | |
| RF-Based VRU Safety Platforms Positioned for Institutional-Scale Growth | Press release | PR Newswire | +0.06% | +1.54% | |
| onsemi to Announce Fourth Quarter and 2025 Annual Financial Results | Press release | GlobeNewswire | -0.82% | -2.59% | |
| onsemi and FORVIA HELLA Extend Strategic Collaboration with Next-Generation Power Technology | Press release | GlobeNewswire | +0.78% | +1.76% | |
| onsemi and Innoscience Announce Plans to Collaborate to Speed Global Rollout of GaN Power Portfolio | Press release | GlobeNewswire | -0.19% | +2.93% | |
| Form 8-K ON SEMICONDUCTOR CORP For: Nov 13 | SEC filing · Form 8-K | SEC EDGAR | +0.35% | -0.04% | |
| Form 8-K ON SEMICONDUCTOR CORP For: Nov 04 | SEC filing · Form 8-K | SEC EDGAR | +0.68% | +2.52% | |
| Form 10-Q ON SEMICONDUCTOR CORP For: Oct 03 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | -2.74% | |
| Form 8-K ON SEMICONDUCTOR CORP For: Nov 03 | SEC filing · Form 8-K | SEC EDGAR | -1.59% | +1.92% | |
| onsemi Reports Third Quarter 2025 Results | Press release | GlobeNewswire | -1.59% | +1.92% | |
| Weebit Nano tapes out embedded ReRAM test chips at onsemi production fab | Press release | GlobeNewswire | -1.36% | +0.44% | |
| Form 8-K ON SEMICONDUCTOR CORP For: Sep 23 | SEC filing · Form 8-K | SEC EDGAR | -0.26% | -3.02% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the ON section they belong to.
Where else ON is measured.
ON earnings → · Analyst actions → · SEC filings →
Other Technology names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Castlight Health, Inc. Class B (CSLT) | 827 | 0.00% | 49% |
| QAD Inc. - Class B (QADB) | 820 | 0.00% | 30% |
| ROSETTA STONE (RST) | 819 | 0.00% | 47% |
| ACACIA COMMUNICATIONS (ACIA) | 811 | +0.06% | 54% |
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 ON Semiconductor Corporation's median reaction calculated?
Every labeled ON 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 819 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. 52% of ON'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 ON'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.