ESS Tech, Inc. SEC filings GWHT
ESS Tech, Inc. has 473 filings in SEC EDGAR's recent list, going back to Jul 31, 2020. Its latest annual report, Form ARS, was filed on Apr 15, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 11, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Oct 5, 2026 (listing notice, regulation fd disclosure). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 424B3 | Prospectus | Sep 16, 2026 | — |
| S-3 | Shelf registration | Sep 8, 2026 | — |
| 424B5 | Prospectus supplement | Aug 21, 2026 | — |
| 424B5 | Prospectus supplement | Jul 17, 2026 | — |
| S-8 | Employee stock plan registration | Mar 5, 2026 | — |
| 424B5 | Prospectus supplement | Jan 30, 2026 | — |
| 424B3 | Prospectus | Dec 11, 2025 | — |
| 424B5 | Prospectus supplement | Dec 11, 2025 | — |
| S-3 | Shelf registration | Nov 13, 2025 | — |
| 424B5 | Prospectus supplement | Nov 13, 2025 | — |
| 424B2 | Prospectus | Oct 22, 2025 | — |
| 424B2 | Prospectus | Oct 17, 2025 | — |
| 424B2 | Prospectus | Oct 15, 2025 | — |
| 424B2 | Prospectus | Oct 14, 2025 | — |
| 424B2 | Prospectus | Oct 10, 2025 | — |
| 424B2 | Prospectus | Oct 9, 2025 | — |
| 424B2 | Prospectus | Oct 7, 2025 | — |
| 424B2 | Prospectus | Sep 30, 2025 | — |
| 424B2 | Prospectus | Sep 25, 2025 | — |
| 424B2 | Prospectus | Sep 19, 2025 | — |
| 424B2 | Prospectus | Sep 16, 2025 | — |
| 424B2 | Prospectus | Sep 5, 2025 | — |
| 424B2 | Prospectus | Aug 28, 2025 | — |
| 424B2 | Prospectus | Aug 21, 2025 | — |
| 424B2 | Prospectus | Aug 15, 2025 | — |
| 424B2 | Prospectus | Jul 28, 2025 | — |
| 424B2 | Prospectus | Jul 22, 2025 | — |
| 424B2 | Prospectus | Jul 15, 2025 | — |
| 424B2 | Prospectus | Jul 11, 2025 | — |
| 424B3 | Prospectus | Jul 11, 2025 | — |
| 424B5 | Prospectus supplement | Mar 31, 2025 | — |
| S-8 | Employee stock plan registration | Mar 31, 2025 | — |
| S-8 | Employee stock plan registration | Feb 9, 2024 | — |
| 424B3 | Prospectus | Dec 15, 2023 | — |
| S-3/A | Filing | Dec 7, 2023 | — |
| S-3 | Shelf registration | Nov 14, 2023 | — |
| S-8 | Employee stock plan registration | Mar 2, 2023 | — |
| 424B3 | Prospectus | Nov 17, 2022 | — |
| S-3 | Shelf registration | Nov 3, 2022 | — |
| POS AM | Filing | Nov 3, 2022 | — |
| 424B3 | Prospectus | Oct 27, 2022 | — |
| 424B3 | Prospectus | Aug 26, 2022 | — |
| 424B3 | Prospectus | Aug 12, 2022 | — |
| 424B8 | Filing | Jun 30, 2022 | — |
| 424B3 | Prospectus | Mar 17, 2022 | — |
| S-1 | Registration statement | Mar 4, 2022 | — |
| S-8 | Employee stock plan registration | Mar 4, 2022 | — |
| S-1 | Registration statement | Dec 27, 2021 | — |
| 424B3 | Prospectus | Dec 20, 2021 | — |
| S-8 | Employee stock plan registration | Dec 15, 2021 | — |
| POS AM | Filing | Dec 9, 2021 | — |
| 424B3 | Prospectus | Nov 23, 2021 | — |
| 424B3 | Prospectus | Nov 23, 2021 | — |
| 424B3 | Prospectus | Nov 16, 2021 | — |
| 424B3 | Prospectus | Nov 15, 2021 | — |
| 424B3 | Prospectus | Nov 10, 2021 | — |
| S-1 | Registration statement | Nov 3, 2021 | — |
| 424B3 | Prospectus | Sep 14, 2021 | — |
| S-4/A | Filing | Sep 9, 2021 | — |
| S-4/A | Filing | Aug 26, 2021 | — |
| S-4/A | Filing | Jul 28, 2021 | — |
| S-4 | Registration for a merger or exchange | Jun 21, 2021 | — |
| 424B4 | Prospectus | Sep 18, 2020 | — |
| S-1/A | Amended registration statement | Sep 15, 2020 | — |
| S-1/A | Amended registration statement | Sep 11, 2020 | — |
| S-1/A | Amended registration statement | Sep 9, 2020 | — |
| S-1 | Registration statement | Aug 31, 2020 | — |
Showing 67 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Miscellaneous Electrical Machinery, Equipment & Supplies (SIC 3690)
- Listed as
- GWHT (OTC)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Wilsonville, OR
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1819438
- Former names
- ACON S2 Acquisition Corp. (until Oct 8, 2021)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.