Company filings profile · CIK 0001759631
Hyliion Holdings Corp. — SEC filings & insider activity.
Real, source-linked SEC EDGAR activity for Hyliion Holdings Corp. (HYLN): 28 filings in the last 90 days vs 18 in the prior 90 (filing-velocity rising ↑ · 1.56×). Latest material 8-K events, insider Form-4 transactions, and periodic reports — monitored for change.
✔ Verified against the public SEC EDGAR filing record as of Oct 2, 2026. Source-linked, daily-refreshed.
Material 8-K events — Hyliion Holdings Corp.
8-K disclosures decoded by item code (the material events: agreements, results, control/management changes, impairments, restatements).
| Filed | Event | |
|---|---|---|
| Oct 2, 2026 | Departure/Election of Directors or Officers; Financial Statements and Exhibits | ↗ |
| Aug 11, 2026 | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| Jul 24, 2026 | Other Events | ↗ |
| May 19, 2026 | Item 5.07 | ↗ |
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Insider transactions (Form 4 / 3 / 5)
Recent filings
| Filed | Form | Detail | |
|---|---|---|---|
| Oct 2, 2026 | 8-K | Departure/Election of Directors or Officers; Financial Statements and Exhibits | ↗ |
| Oct 1, 2026 | 4 | FORM 4 | ↗ |
| Oct 1, 2026 | 4 | FORM 4 | ↗ |
| Oct 1, 2026 | 4 | FORM 4 | ↗ |
| Oct 1, 2026 | 4 | FORM 4 | ↗ |
| Oct 1, 2026 | 4 | FORM 4 | ↗ |
| Oct 1, 2026 | 4 | FORM 4 | ↗ |
| Sep 22, 2026 | 4 | FORM 4 | ↗ |
| Sep 21, 2026 | CERT | NYSE TEXAS CERTIFICATION | ↗ |
| Sep 21, 2026 | 8-A12B | 8-A12B | ↗ |
| Aug 27, 2026 | 4 | FORM 4 | ↗ |
| Aug 25, 2026 | 4 | FORM 4 | ↗ |
| Aug 21, 2026 | 4 | FORM 4 | ↗ |
| Aug 21, 2026 | 4 | FORM 4 | ↗ |
| Aug 21, 2026 | 4 | FORM 4 | ↗ |
| Aug 21, 2026 | 4 | FORM 4 | ↗ |
| Aug 21, 2026 | 4 | FORM 4 | ↗ |
| Aug 21, 2026 | 144 | ↗ | |
| Aug 21, 2026 | 144 | ↗ | |
| Aug 21, 2026 | 144 | ↗ | |
| Aug 21, 2026 | 144 | ↗ | |
| Aug 21, 2026 | 144 | ↗ | |
| Aug 11, 2026 | S-8 | REGISTRATION STATEMENT | ↗ |
| Aug 11, 2026 | 424B5 | PROSPECTUS SUPPLEMENT | ↗ |
| Aug 11, 2026 | 10-Q | 10-Q | ↗ |
| Aug 11, 2026 | 8-K | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| Jul 28, 2026 | SCHEDULE 13G | ↗ | |
| Jul 24, 2026 | 8-K | Other Events | ↗ |
| Jun 30, 2026 | 4 | FORM 4 | ↗ |
| May 29, 2026 | SD | SPECIALIZED DISCLOSURE REPORT | ↗ |
| May 27, 2026 | 4 | FORM 4 | ↗ |
| May 21, 2026 | 4 | FORM 4 | ↗ |
| May 21, 2026 | 4 | FORM 4 | ↗ |
| May 21, 2026 | 4 | FORM 4 | ↗ |
| May 21, 2026 | 4 | FORM 4 | ↗ |
| May 21, 2026 | 4 | FORM 4 | ↗ |
| May 21, 2026 | 4 | FORM 4 | ↗ |
| May 19, 2026 | 144 | ↗ | |
| May 19, 2026 | 8-K | Item 5.07 | ↗ |
| May 19, 2026 | 144 | ↗ |