Company filings profile · CIK 0001819438
ESS Tech, Inc. — SEC filings & insider activity.
Real, source-linked SEC EDGAR activity for ESS Tech, Inc. (GWH): 18 filings in the last 90 days vs 23 in the prior 90 (filing-velocity cooling ↓ · 0.78×). 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 1, 2026. Source-linked, daily-refreshed.
Material 8-K events — ESS Tech, Inc.
8-K disclosures decoded by item code (the material events: agreements, results, control/management changes, impairments, restatements).
| Filed | Event | |
|---|---|---|
| Sep 30, 2026 | Delisting / Listing-Rule Failure | ↗ |
| Sep 3, 2026 | Departure/Election of Directors or Officers | ↗ |
| Aug 21, 2026 | Entry into a Material Agreement; Unregistered Sale of Securities; Other Events; Financial Statements and Exhibits | ↗ |
| Aug 11, 2026 | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| Aug 6, 2026 | Results of Operations (earnings); Other Events | ↗ |
| Jul 17, 2026 | Entry into a Material Agreement; Financial Statements and Exhibits | ↗ |
| Jul 1, 2026 | Delisting / Listing-Rule Failure | ↗ |
| Jun 23, 2026 | Results of Operations (earnings); Regulation FD Disclosure; Other Events; Financial Statements and Exhibits | ↗ |
| Jun 18, 2026 | Departure/Election of Directors or Officers | ↗ |
| Jun 15, 2026 | Delisting / Listing-Rule Failure; Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| May 29, 2026 | Item 5.07 | ↗ |
| May 7, 2026 | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
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Recent filings
| Filed | Form | Detail | |
|---|---|---|---|
| Sep 30, 2026 | 8-K | Delisting / Listing-Rule Failure | ↗ |
| Sep 24, 2026 | DEF 14A | DEF 14A | ↗ |
| Sep 16, 2026 | EFFECT | Item ; Item ; Item | ↗ |
| Sep 16, 2026 | 424B3 | 424B3 | ↗ |
| Sep 15, 2026 | PRE 14A | PRE 14A | ↗ |
| Sep 8, 2026 | S-3 | S-3 | ↗ |
| Sep 3, 2026 | 8-K | Departure/Election of Directors or Officers | ↗ |
| Aug 24, 2026 | 4 | ↗ | |
| Aug 24, 2026 | 4 | ↗ | |
| Aug 21, 2026 | 8-K | Entry into a Material Agreement; Unregistered Sale of Securities; Other Events; Financial Statements and Exhibits | ↗ |
| Aug 21, 2026 | 424B5 | 424B5 | ↗ |
| Aug 14, 2026 | SCHEDULE 13G/A | ↗ | |
| Aug 13, 2026 | SCHEDULE 13G/A | ↗ | |
| Aug 11, 2026 | 10-Q | 10-Q | ↗ |
| Aug 11, 2026 | 8-K | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| Aug 6, 2026 | 8-K | Results of Operations (earnings); Other Events | ↗ |
| Jul 17, 2026 | 8-K | Entry into a Material Agreement; Financial Statements and Exhibits | ↗ |
| Jul 17, 2026 | 424B5 | 424B5 | ↗ |
| Jul 2, 2026 | 25-NSE | ↗ | |
| Jul 1, 2026 | 8-K | Delisting / Listing-Rule Failure | ↗ |
| Jun 23, 2026 | 8-K | Results of Operations (earnings); Regulation FD Disclosure; Other Events; Financial Statements and Exhibits | ↗ |
| Jun 18, 2026 | 8-K | Departure/Election of Directors or Officers | ↗ |
| Jun 15, 2026 | 8-K | Delisting / Listing-Rule Failure; Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| Jun 8, 2026 | 4 | ↗ | |
| Jun 2, 2026 | 4 | ↗ | |
| Jun 2, 2026 | 4 | ↗ | |
| Jun 2, 2026 | 4 | ↗ | |
| Jun 2, 2026 | 4 | ↗ | |
| Jun 2, 2026 | 4 | ↗ | |
| Jun 1, 2026 | SD | SD | ↗ |
| May 29, 2026 | 8-K | Item 5.07 | ↗ |
| May 26, 2026 | 4 | ↗ | |
| May 26, 2026 | 4 | ↗ | |
| May 15, 2026 | SCHEDULE 13G/A | ↗ | |
| May 11, 2026 | SCHEDULE 13G | ↗ | |
| May 7, 2026 | 10-Q | 10-Q | ↗ |
| May 7, 2026 | 8-K | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| Apr 15, 2026 | ARS | ARS | ↗ |
| Apr 15, 2026 | DEFA14A | DEFA14A | ↗ |
| Apr 15, 2026 | DEF 14A | DEF 14A | ↗ |