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 |
|---|---|---|---|
| 4 | Insider transaction | Aug 24, 2026 | Aug 21, 2026 |
| 4 | Insider transaction | Aug 24, 2026 | Aug 21, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 13, 2026 | — |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 4 | Insider transaction | May 26, 2026 | May 21, 2026 |
| 4 | Insider transaction | May 26, 2026 | May 21, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 11, 2026 | — |
| 4 | Insider transaction | Feb 26, 2026 | Feb 20, 2026 |
| 4 | Insider transaction | Feb 26, 2026 | Feb 20, 2026 |
| 4 | Insider transaction | Feb 26, 2026 | Feb 13, 2026 |
| 4 | Insider transaction | Feb 26, 2026 | Feb 13, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 17, 2026 | — |
| 4 | Insider transaction | Jan 29, 2026 | Jan 28, 2026 |
| 3 | Initial insider ownership | Jan 29, 2026 | Jan 1, 2026 |
| 4 | Insider transaction | Nov 21, 2025 | Nov 20, 2025 |
| 4 | Insider transaction | Nov 21, 2025 | Nov 20, 2025 |
| 4 | Insider transaction | Oct 15, 2025 | Oct 13, 2025 |
| 4 | Insider transaction | Oct 15, 2025 | Oct 13, 2025 |
| 4 | Insider transaction | Oct 15, 2025 | Oct 13, 2025 |
| 4 | Insider transaction | Oct 15, 2025 | Oct 13, 2025 |
| 4 | Insider transaction | Oct 15, 2025 | Oct 13, 2025 |
| 4 | Insider transaction | Oct 15, 2025 | Oct 13, 2025 |
| 4 | Insider transaction | Oct 15, 2025 | Oct 13, 2025 |
| 144 | Notice of proposed sale | Sep 25, 2025 | — |
| 144 | Notice of proposed sale | Sep 17, 2025 | — |
| 144 | Notice of proposed sale | Sep 10, 2025 | — |
| 4 | Insider transaction | Sep 5, 2025 | Aug 18, 2025 |
| 144 | Notice of proposed sale | Sep 4, 2025 | — |
| 144 | Notice of proposed sale | Aug 29, 2025 | — |
| 4 | Insider transaction | Aug 29, 2025 | Aug 20, 2025 |
| 3 | Initial insider ownership | Aug 28, 2025 | Aug 1, 2025 |
| 3 | Initial insider ownership | Aug 28, 2025 | Aug 18, 2025 |
| 4 | Insider transaction | Aug 21, 2025 | Aug 20, 2025 |
| 4 | Insider transaction | May 22, 2025 | May 20, 2025 |
| 4 | Insider transaction | May 22, 2025 | May 20, 2025 |
| 4 | Insider transaction | Apr 15, 2025 | May 20, 2023 |
| 4 | Insider transaction | Apr 15, 2025 | Apr 13, 2025 |
| 4 | Insider transaction | Apr 4, 2025 | Feb 10, 2025 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Mar 3, 2025 | — |
| 3 | Initial insider ownership | Feb 14, 2025 | Feb 13, 2025 |
| 4 | Insider transaction | Nov 18, 2024 | Nov 18, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Nov 1, 2024 | — |
| 4 | Insider transaction | Sep 17, 2024 | Sep 11, 2024 |
| 4 | Insider transaction | Sep 3, 2024 | Aug 29, 2024 |
| 4 | Insider transaction | Sep 3, 2024 | Aug 30, 2024 |
| 4 | Insider transaction | May 17, 2024 | May 15, 2024 |
| 4 | Insider transaction | May 17, 2024 | May 17, 2024 |
| 4 | Insider transaction | May 17, 2024 | May 17, 2024 |
| 4 | Insider transaction | May 17, 2024 | May 17, 2024 |
| 4 | Insider transaction | May 17, 2024 | May 17, 2024 |
| 4 | Insider transaction | May 17, 2024 | May 17, 2024 |
| 4 | Insider transaction | May 17, 2024 | May 17, 2024 |
| 4 | Insider transaction | May 15, 2024 | May 14, 2024 |
| 4 | Insider transaction | May 13, 2024 | May 10, 2024 |
| 4 | Insider transaction | May 9, 2024 | May 9, 2024 |
| 4 | Insider transaction | May 8, 2024 | Mar 7, 2024 |
| 4 | Insider transaction | Mar 18, 2024 | Mar 15, 2024 |
| 4 | Insider transaction | Feb 16, 2024 | Feb 15, 2024 |
| 4/A | Form 4/a | Feb 16, 2024 | Mar 13, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 31, 2024 | — |
| 4 | Insider transaction | Nov 16, 2023 | Nov 16, 2023 |
| 4 | Insider transaction | Nov 15, 2023 | Nov 15, 2023 |
| 4 | Insider transaction | Nov 14, 2023 | Nov 14, 2023 |
| 4 | Insider transaction | Nov 13, 2023 | Nov 13, 2023 |
| 4 | Insider transaction | Nov 13, 2023 | Nov 13, 2023 |
| SC 13G | Ownership over 5% (passive) | Sep 25, 2023 | — |
| 3 | Initial insider ownership | Sep 25, 2023 | Sep 21, 2023 |
| 4 | Insider transaction | Sep 6, 2023 | Sep 5, 2023 |
| 4 | Insider transaction | Aug 30, 2023 | Aug 28, 2023 |
| 3 | Initial insider ownership | Aug 30, 2023 | Aug 28, 2023 |
| SC 13D | Ownership over 5% (active) | Jul 13, 2023 | — |
| 4 | Insider transaction | May 24, 2023 | May 19, 2023 |
| 3 | Initial insider ownership | May 24, 2023 | May 19, 2023 |
| 4 | Insider transaction | May 22, 2023 | May 19, 2023 |
| 4 | Insider transaction | May 22, 2023 | May 19, 2023 |
| 4 | Insider transaction | May 22, 2023 | May 19, 2023 |
| 4 | Insider transaction | May 22, 2023 | May 19, 2023 |
| 4 | Insider transaction | May 22, 2023 | May 19, 2023 |
| 4 | Insider transaction | May 17, 2023 | May 16, 2023 |
| 4 | Insider transaction | May 16, 2023 | May 16, 2023 |
| 4 | Insider transaction | May 16, 2023 | May 15, 2023 |
| 4 | Insider transaction | May 15, 2023 | May 12, 2023 |
| 4 | Insider transaction | Apr 26, 2023 | Apr 26, 2023 |
| SC 13G | Ownership over 5% (passive) | Mar 29, 2023 | — |
| 4 | Insider transaction | Mar 14, 2023 | Mar 13, 2023 |
| 4 | Insider transaction | Mar 14, 2023 | Mar 13, 2023 |
| 4 | Insider transaction | Mar 7, 2023 | Mar 6, 2023 |
| 4 | Insider transaction | Mar 7, 2023 | Mar 7, 2023 |
| 4 | Insider transaction | Feb 23, 2023 | Feb 21, 2023 |
| 4 | Insider transaction | Feb 23, 2023 | Feb 21, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 6, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 30, 2023 | — |
| 4 | Insider transaction | Dec 16, 2022 | Dec 15, 2022 |
| 4 | Insider transaction | Nov 22, 2022 | Nov 21, 2022 |
| 4 | Insider transaction | Nov 22, 2022 | Nov 18, 2022 |
| 3/A | Form 3/a | Nov 10, 2022 | Nov 10, 2022 |
| 3 | Initial insider ownership | Nov 8, 2022 | Nov 4, 2022 |
| 3 | Initial insider ownership | Nov 7, 2022 | Nov 4, 2022 |
| 4 | Insider transaction | Oct 20, 2022 | Oct 19, 2022 |
| 4 | Insider transaction | Oct 19, 2022 | Oct 17, 2022 |
| 4 | Insider transaction | Oct 19, 2022 | Oct 17, 2022 |
| 4 | Insider transaction | Oct 19, 2022 | Oct 17, 2022 |
| 4 | Insider transaction | Oct 18, 2022 | Oct 17, 2022 |
| 4 | Insider transaction | Jun 3, 2022 | Jun 1, 2022 |
| 4 | Insider transaction | Jun 3, 2022 | Jun 1, 2022 |
| 4 | Insider transaction | Jun 3, 2022 | Jun 1, 2022 |
| 4 | Insider transaction | Jun 3, 2022 | Jun 1, 2022 |
| 4 | Insider transaction | Jun 3, 2022 | Jun 1, 2022 |
| 4 | Insider transaction | Jun 3, 2022 | Jun 1, 2022 |
| 4 | Insider transaction | Mar 3, 2022 | Mar 1, 2022 |
| 4 | Insider transaction | Feb 18, 2022 | Feb 17, 2022 |
| 3 | Initial insider ownership | Feb 18, 2022 | Feb 17, 2022 |
| 4 | Insider transaction | Feb 18, 2022 | Feb 16, 2022 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 11, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 11, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 11, 2022 | — |
| 4 | Insider transaction | Feb 9, 2022 | Feb 8, 2022 |
| 4 | Insider transaction | Feb 9, 2022 | Feb 8, 2022 |
| 4 | Insider transaction | Feb 9, 2022 | Feb 8, 2022 |
| SC 13G | Ownership over 5% (passive) | Feb 9, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 28, 2022 | — |
| 4 | Insider transaction | Jan 25, 2022 | Jan 24, 2022 |
| 4 | Insider transaction | Jan 25, 2022 | Jan 24, 2022 |
| 4 | Insider transaction | Jan 19, 2022 | Jan 17, 2022 |
| 4 | Insider transaction | Jan 19, 2022 | Jan 17, 2022 |
| 4 | Insider transaction | Jan 6, 2022 | Jan 4, 2022 |
| 4 | Insider transaction | Jan 6, 2022 | Jan 4, 2022 |
| 4 | Insider transaction | Jan 6, 2022 | Jan 4, 2022 |
| 4 | Insider transaction | Jan 6, 2022 | Jan 4, 2022 |
| 4 | Insider transaction | Dec 21, 2021 | Dec 17, 2021 |
| 4 | Insider transaction | Dec 21, 2021 | Dec 17, 2021 |
| 4 | Insider transaction | Dec 21, 2021 | Dec 17, 2021 |
| SC 13D/A | Amended ownership over 5% (active) | Nov 22, 2021 | — |
| SC 13D/A | Amended ownership over 5% (active) | Nov 22, 2021 | — |
| 4 | Insider transaction | Nov 17, 2021 | Nov 15, 2021 |
| 4 | Insider transaction | Nov 17, 2021 | Nov 15, 2021 |
| 4 | Insider transaction | Nov 17, 2021 | Nov 9, 2021 |
| 4 | Insider transaction | Nov 17, 2021 | Nov 15, 2021 |
| 4 | Insider transaction | Nov 17, 2021 | Nov 15, 2021 |
| 4 | Insider transaction | Nov 17, 2021 | Nov 15, 2021 |
| 4 | Insider transaction | Nov 17, 2021 | Nov 15, 2021 |
| 4/A | Form 4/a submission | Nov 17, 2021 | Nov 9, 2021 |
| SC 13D/A | Amended ownership over 5% (active) | Nov 17, 2021 | — |
| 4 | Insider transaction | Nov 12, 2021 | Nov 9, 2021 |
| 4 | Insider transaction | Nov 12, 2021 | Nov 9, 2021 |
| 4 | Insider transaction | Nov 12, 2021 | Nov 9, 2021 |
| 4 | Insider transaction | Nov 12, 2021 | Nov 9, 2021 |
| 4 | Insider transaction | Nov 12, 2021 | Nov 9, 2021 |
| SC 13D | Ownership over 5% (active) | Oct 25, 2021 | — |
| SC 13G | Ownership over 5% (passive) | Oct 21, 2021 | — |
| SC 13G | Ownership over 5% (passive) | Oct 20, 2021 | — |
| 3 | Initial insider ownership | Oct 18, 2021 | Oct 8, 2021 |
| 3 | Initial insider ownership | Oct 18, 2021 | Oct 8, 2021 |
| 3 | Initial insider ownership | Oct 18, 2021 | Oct 8, 2021 |
| 3 | Initial insider ownership | Oct 18, 2021 | Oct 8, 2021 |
| 3 | Initial insider ownership | Oct 18, 2021 | Oct 8, 2021 |
| 3 | Initial insider ownership | Oct 18, 2021 | Oct 8, 2021 |
| 3 | Initial insider ownership | Oct 18, 2021 | Oct 8, 2021 |
| 3 | Initial insider ownership | Oct 18, 2021 | Oct 8, 2021 |
| 3 | Initial insider ownership | Oct 18, 2021 | Oct 8, 2021 |
| 3 | Initial insider ownership | Oct 18, 2021 | Oct 8, 2021 |
| 3 | Initial insider ownership | Oct 18, 2021 | Oct 8, 2021 |
| 3 | Initial insider ownership | Oct 18, 2021 | Oct 8, 2021 |
| 3 | Initial insider ownership | Oct 18, 2021 | Oct 8, 2021 |
| SC 13D | Ownership over 5% (active) | Oct 18, 2021 | — |
| SC 13D | Ownership over 5% (active) | Oct 18, 2021 | — |
| 4 | Insider transaction | Oct 13, 2021 | Oct 8, 2021 |
| 4 | Insider transaction | Oct 13, 2021 | Oct 8, 2021 |
| 4 | Insider transaction | Oct 13, 2021 | Oct 8, 2021 |
| 4 | Insider transaction | Oct 13, 2021 | Oct 8, 2021 |
| 4 | Insider transaction | Oct 13, 2021 | Oct 8, 2021 |
| 4 | Insider transaction | Oct 13, 2021 | Oct 8, 2021 |
| 4 | Insider transaction | Oct 13, 2021 | Oct 8, 2021 |
| 4 | Insider transaction | Oct 13, 2021 | Oct 8, 2021 |
| SC 13G | Ownership over 5% (passive) | Mar 30, 2021 | — |
| SC 13G | Ownership over 5% (passive) | Feb 16, 2021 | — |
| SC 13G | Ownership over 5% (passive) | Feb 12, 2021 | — |
| 4 | Insider transaction | Nov 17, 2020 | Nov 16, 2020 |
| SC 13G | Ownership over 5% (passive) | Sep 25, 2020 | — |
| 3 | Initial insider ownership | Sep 17, 2020 | Sep 16, 2020 |
| 3 | Initial insider ownership | Sep 16, 2020 | Sep 16, 2020 |
| 3 | Initial insider ownership | Sep 16, 2020 | Sep 16, 2020 |
| 3 | Initial insider ownership | Sep 16, 2020 | Sep 16, 2020 |
| 3 | Initial insider ownership | Sep 16, 2020 | Sep 16, 2020 |
| 3 | Initial insider ownership | Sep 16, 2020 | Sep 16, 2020 |
| 3 | Initial insider ownership | Sep 16, 2020 | Sep 16, 2020 |
| 3 | Initial insider ownership | Sep 16, 2020 | Sep 16, 2020 |
Showing 199 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.