Hyliion Holdings Corp. Class A (HYLN)
HYLN moved a median of +0.28% 30 minutes after news, and +0.26% by the close. How HYLN actually reacts to news — the realized, point-in-time move the market made, measured across 751 labeled events over the last three years with zero look-ahead.
HYLN’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 49% | 726 |
| 30-min | +0.28% | 54% | 726 |
| 60-min | +0.13% | 52% | 726 |
| to close | +0.26% | 53% | 728 |
| Middle 50% of HYLN reactions | -1.22% to +1.55% |
|---|---|
| Median reaction (30-min) | +0.28% |
| Measured reactions | 751 |
Half of all Hyliion Holdings Corp. Class A news events land between -1.22% and +1.55% 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 HYLN moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to HYLN's baseline. Nothing else.
Recent HYLN events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Kaplan Fox Urges Investors of Hyliion Holdings Corp. (NYSE: HYLN) to Seek a Leadership Role Before October 27, 2026 | Press release | GlobeNewswire | -1.37% | -7.01% | |
| Hyliion’s KARNO Power Module Named to TIME’s Best Inventions of 2026 | Press release | Business Wire | -1.56% | +2.50% | |
| Hyliion Holdings Corp. Sued for Securities Law Violations - Contact the DJS Law Group to Discuss Your Rights - HYLN | Press release | PR Newswire | -0.85% | -4.26% | |
| Kaplan Fox Encourages Hyliion Holdings Corp. (NYSE: HYLN) Investors Seeking Recovery to Contact the Firm Before October 27, 2026 | Press release | GlobeNewswire | +0.43% | -2.60% | |
| Form 8-K Hyliion Holdings Corp. For: Sep 28 | SEC filing · Form 8-K | SEC EDGAR | +1.85% | +4.86% | |
| Kaplan Fox Reminds Hyliion Holdings Corp. (NYSE: HYLN) Investors to Seek a Leadership Role Before Deadline on October 27, 2026 | Press release | GlobeNewswire | +1.11% | -2.46% | |
| Kaplan Fox Urges Hyliion Holdings Corp. (NYSE: HYLN) Investors to Contact the Firm Before the Deadline on October 27, 2026 | Press release | GlobeNewswire | -0.45% | -7.38% | |
| Hyliion Announces Dual Listing on NYSE Texas | Press release | Business Wire | +0.15% | +0.90% | |
| Shareholders who lost money in shares of Hyliion Holdings Corp. (NYSE:HYLN) should contact Wolf Haldenstein Immediately | Press release | PR Newswire | +0.15% | +0.90% | |
| Form 8-A12B Hyliion Holdings Corp. | SEC filing · Form 8-A12B | SEC EDGAR | -0.12% | +3.55% | |
| Form CERT Hyliion Holdings Corp. | SEC filing · Form CERT | SEC EDGAR | +0.11% | +2.33% | |
| Shareholders who lost money in shares of Hyliion Holdings Corp. (NYSE:HYLN) should contact Wolf Haldenstein Immediately | Press release | GlobeNewswire | -0.12% | +3.55% | |
| Shareholders who lost money in shares of Hyliion Holdings Corp. (NYSE:HYLN) should contact Wolf Haldenstein Immediately | Press release | PR Newswire | +1.34% | +2.44% | |
| Kaplan Fox Encourages Hyliion Holdings Corp. (NYSE: HYLN) Investors to Contact the Firm Before the Deadline on October 27, 2026 for a Leadership Role | Press release | GlobeNewswire | -0.13% | +1.16% | |
| Shareholders who lost money in shares of Hyliion Holdings Corp. (NYSE:HYLN) should contact Wolf Haldenstein Immediately | Press release | GlobeNewswire | -0.51% | +0.25% | |
| Shareholders who lost money in shares of Hyliion Holdings Corp. (NYSE:HYLN) should contact Wolf Haldenstein Immediately | Press release | PR Newswire | -0.40% | +1.61% | |
| Shareholders who lost money in shares of Hyliion Holdings Corp. (NYSE:HYLN) should contact Wolf Haldenstein Immediately | Press release | GlobeNewswire | -0.40% | +1.61% | |
| Shareholders who lost money in shares of Hyliion Holdings Corp. (NYSE:HYLN) should contact Wolf Haldenstein Immediately | Press release | PR Newswire | +0.54% | +8.40% | |
| Shareholders who lost money in shares of Hyliion Holdings Corp. (NYSE:HYLN) should contact Wolf Haldenstein Immediately | Press release | GlobeNewswire | +0.54% | +8.40% | |
| Kaplan Fox Reminds Hyliion Holdings Corp. (NYSE: HYLN) Investors with Significant Losses to Seek a Leadership Role Before Deadline on October 27, 2026 | Press release | GlobeNewswire | +0.14% | -0.67% | |
| Hyliion Holdings Corp. Sued for Securities Law Violations - Contact the DJS Law Group to Discuss Your Rights – HYLN | Press release | Business Wire | +1.45% | +0.87% | |
| Form 10-Q Hyliion Holdings Corp. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -9.04% | -23.58% | |
| Form 8-K Hyliion Holdings Corp. For: Aug 11 | SEC filing · Form 8-K | SEC EDGAR | -9.04% | -23.58% | |
| Form S-8 Hyliion Holdings Corp. | SEC filing · Form S-8 | SEC EDGAR | -9.04% | -23.58% | |
| Hyliion Holdings Reports Second-Quarter 2026 Financial Results | Press release | Business Wire | -9.04% | -23.58% | |
| Hyliion Awarded $41.7 Million U.S. Navy Contract to Scale Multi-Megawatt KARNO Power Modules | Press release | Business Wire | -1.92% | -3.89% | |
| Hyliion Successfully Demonstrates Multiple KARNO Power Modules Operating as a Single Scalable Power Plant | Press release | Business Wire | -0.28% | +6.80% | |
| Hyliion Holdings Schedules Q2 2026 Financial Results Conference Call and Webcast for August 12, 2026 | Press release | Business Wire | -0.57% | -7.43% | |
| Form 8-K Hyliion Holdings Corp. For: Jul 21 | SEC filing · Form 8-K | SEC EDGAR | -4.05% | -8.60% | |
| Hyliion Awarded $41.7 Million U.S. Navy Contract for Megawatt-Scale KARNO Power Generation Systems | Press release | Business Wire | +3.73% | -3.96% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against Hyliion Holdings Corp. (HYLN) and Encourages Shareholders to Learn More About the Investigation | Press release | ACCESS Newswire | -0.12% | -0.97% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Hyliion Holdings Corp. (HYLN) Shareholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | -4.35% | -9.41% | |
| Bronstein, Gewirtz & Grossman, LLC Is Investigating Hyliion Holdings Corp. (HYLN) And Encourages Shareholders to Connect | Press release | ACCESS Newswire | +0.24% | -1.55% | |
| Hyliion to Showcase KARNO Technology at 2026 Pennsylvania Defense and Innovation Summit | Press release | Business Wire | -0.23% | -4.18% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Hyliion Holdings Corp. (HYLN) Stockholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | -0.60% | -3.23% | |
| Hyliion Appoints Defense Innovation Leader Abdul Subhani as Strategic Advisor | Press release | Business Wire | -3.62% | -5.37% | |
| Hyliion Holdings Corp. (HYLN) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Shareholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | -0.22% | -6.33% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against Hyliion Holdings Corp. (HYLN) and Encourages Stockholders to Learn More About the Investigation | Press release | ACCESS Newswire | +2.64% | -1.61% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Hyliion Holdings Corp. (HYLN) Investors to Inquire about Securities Investigation | Press release | ACCESS Newswire | -2.25% | -7.50% | |
| Lowey Dannenberg, P.C. is Investigating Hyliion Holdings Corp (AMEX: HYLN) for Potential Violations of the Federal Securities Laws | Press release | GlobeNewswire | +0.23% | +0.58% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against Hyliion Holdings Corp. (HYLN) And Encourages Stockholders to Reach Out | Press release | ACCESS Newswire | -0.20% | +2.56% | |
| Hyliion's KARNO™ Power Module Named 2026 Most Valuable Product by Consulting-Specifying Engineer | Press release | PR Newswire | -2.77% | -8.76% | |
| Hyliion’s KARNO™ Power Module Named 2026 Most Valuable Product by Consulting-Specifying Engineer | Press release | Business Wire | -2.77% | -8.76% | |
| Form SD Hyliion Holdings Corp. | SEC filing · Form SD | SEC EDGAR | -2.77% | -8.76% | |
| Form 8-K Hyliion Holdings Corp. For: May 19 | SEC filing · Form 8-K | SEC EDGAR | -3.39% | -0.97% | |
| Hyliion Announces USX-1 Defiant USV as the Launch Platform for KARNO™ Core Sea Trials | Press release | Business Wire | +1.35% | +0.49% | |
| Form 10-Q Hyliion Holdings Corp. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +16.49% | +25.96% | |
| Form 8-K Hyliion Holdings Corp. For: May 12 | SEC filing · Form 8-K | SEC EDGAR | +16.49% | +25.96% | |
| Hyliion Holdings Reports First-Quarter 2026 Financial Results | Press release | Business Wire | +16.49% | +25.96% | |
| Hyliion Achieves True Fuel-Agnostic Performance with the Next-Generation Reactor Design | Press release | Business Wire | +0.41% | +11.74% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the HYLN section they belong to.
Where else HYLN is measured.
HYLN earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is Hyliion Holdings Corp. Class A's median reaction calculated?
Every labeled HYLN 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 751 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. 54% of HYLN'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 HYLN'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.