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 |
|---|---|---|---|
| 8-K |
Current report
Listing notice, Regulation FD disclosure
|
Oct 5, 2026 | Oct 2, 2026 |
| 8-K |
Current report
Listing notice
|
Sep 30, 2026 | Sep 24, 2026 |
| DEF 14A | Proxy statement | Sep 24, 2026 | Sep 24, 2026 |
| EFFECT | Filing | Sep 16, 2026 | — |
| 424B3 | Prospectus | Sep 16, 2026 | — |
| PRE 14A | Preliminary proxy statement | Sep 15, 2026 | Sep 14, 2026 |
| S-3 | Shelf registration | Sep 8, 2026 | — |
| 8-K |
Current report
Officer or director change
|
Sep 3, 2026 | Aug 28, 2026 |
| 8-K |
Current report
Material agreement, Unregistered share sale, Other events
|
Aug 21, 2026 | Aug 20, 2026 |
| 424B5 | Prospectus supplement | Aug 21, 2026 | — |
| 10-Q | Quarterly report | Aug 11, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 11, 2026 | Aug 11, 2026 |
| 8-K |
Current report
Results of operations, Other events
|
Aug 6, 2026 | Aug 6, 2026 |
| 8-K |
Current report
Material agreement
|
Jul 17, 2026 | Jul 16, 2026 |
| 424B5 | Prospectus supplement | Jul 17, 2026 | — |
| 25-NSE | Delisting notice | Jul 2, 2026 | — |
| 8-K |
Current report
Listing notice
|
Jul 1, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure, Other events
|
Jun 23, 2026 | Jun 23, 2026 |
| 8-K |
Current report
Officer or director change
|
Jun 18, 2026 | Jun 12, 2026 |
| 8-K |
Current report
Listing notice, Regulation FD disclosure
|
Jun 15, 2026 | Jun 9, 2026 |
| SD | Specialized disclosure (conflict minerals) | Jun 1, 2026 | — |
| 8-K |
Current report
Shareholder vote results
|
May 29, 2026 | May 29, 2026 |
| 10-Q | Quarterly report | May 7, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 7, 2026 | May 7, 2026 |
| ARS | Annual report to shareholders | Apr 15, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Apr 15, 2026 | — |
| DEF 14A | Proxy statement | Apr 15, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Officer or director change
|
Apr 15, 2026 | Apr 10, 2026 |
| S-8 | Employee stock plan registration | Mar 5, 2026 | — |
| 10-K | Annual report | Mar 5, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations, Other events
|
Mar 5, 2026 | Mar 5, 2026 |
| 8-K |
Current report
Material agreement
|
Jan 30, 2026 | Jan 29, 2026 |
| 424B5 | Prospectus supplement | Jan 30, 2026 | — |
| 8-K |
Current report
Results of operations, Officer or director change
|
Jan 29, 2026 | Jan 23, 2026 |
| 8-K |
Current report
Officer or director change
|
Jan 6, 2026 | Jan 1, 2026 |
| EFFECT | Filing | Dec 11, 2025 | — |
| 424B3 | Prospectus | Dec 11, 2025 | — |
| 424B5 | Prospectus supplement | Dec 11, 2025 | — |
| CORRESP | Letter to the SEC | Dec 9, 2025 | — |
| 8-K |
Current report
Material agreement
|
Dec 5, 2025 | Dec 4, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 13, 2025 | Nov 13, 2025 |
| S-3 | Shelf registration | Nov 13, 2025 | — |
| 8-K |
Current report
Material agreement
|
Nov 13, 2025 | Nov 13, 2025 |
| 424B5 | Prospectus supplement | Nov 13, 2025 | — |
| 10-Q | Quarterly report | Nov 13, 2025 | Sep 30, 2025 |
| 424B2 | Prospectus | Oct 22, 2025 | — |
| 424B2 | Prospectus | Oct 17, 2025 | — |
| 424B2 | Prospectus | Oct 15, 2025 | — |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale
|
Oct 14, 2025 | Oct 14, 2025 |
| 424B2 | Prospectus | Oct 14, 2025 | — |
| 8-K |
Current report
Shareholder vote results
|
Oct 14, 2025 | Oct 13, 2025 |
| 424B2 | Prospectus | Oct 10, 2025 | — |
| 424B2 | Prospectus | Oct 9, 2025 | — |
| DEFA14A | Additional proxy material | Oct 7, 2025 | — |
| 424B2 | Prospectus | Oct 7, 2025 | — |
| 424B2 | Prospectus | Sep 30, 2025 | — |
| 424B2 | Prospectus | Sep 25, 2025 | — |
| ARS | Annual report to shareholders | Sep 22, 2025 | Sep 22, 2025 |
| DEF 14A | Proxy statement | Sep 22, 2025 | Sep 22, 2025 |
| 424B2 | Prospectus | Sep 19, 2025 | — |
| 424B2 | Prospectus | Sep 16, 2025 | — |
| PRE 14A | Preliminary proxy statement | Sep 9, 2025 | Sep 9, 2025 |
| 424B2 | Prospectus | Sep 5, 2025 | — |
| 8-K |
Current report
Other events
|
Aug 29, 2025 | Aug 29, 2025 |
| 424B2 | Prospectus | Aug 28, 2025 | — |
| 424B2 | Prospectus | Aug 21, 2025 | — |
| 8-K |
Current report
Officer or director change
|
Aug 18, 2025 | Aug 12, 2025 |
| 424B2 | Prospectus | Aug 15, 2025 | — |
| 10-Q | Quarterly report | Aug 14, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 14, 2025 | Aug 14, 2025 |
| 8-K |
Current report
Officer or director change
|
Aug 7, 2025 | Aug 1, 2025 |
| 424B2 | Prospectus | Jul 28, 2025 | — |
| D | Filing | Jul 23, 2025 | — |
| 424B2 | Prospectus | Jul 22, 2025 | — |
| 424B2 | Prospectus | Jul 15, 2025 | — |
| 8-K |
Current report
Material agreement, Acquisition or sale of assets, Results of operations, New debt, Unregistered share sale, Other events
|
Jul 11, 2025 | Jul 9, 2025 |
| 424B2 | Prospectus | Jul 11, 2025 | — |
| 424B3 | Prospectus | Jul 11, 2025 | — |
| 8-K |
Current report
Other events
|
Jun 4, 2025 | Jun 3, 2025 |
| SD | Specialized disclosure (conflict minerals) | May 30, 2025 | — |
| 8-K |
Current report
Other events
|
May 28, 2025 | May 27, 2025 |
| 10-Q | Quarterly report | May 15, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 15, 2025 | May 15, 2025 |
| 8-K |
Current report
Material agreement
|
Mar 31, 2025 | Mar 31, 2025 |
| 424B5 | Prospectus supplement | Mar 31, 2025 | — |
| S-8 | Employee stock plan registration | Mar 31, 2025 | — |
| 10-K | Annual report | Mar 31, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Mar 31, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Listing notice, Regulation FD disclosure
|
Mar 28, 2025 | Mar 24, 2025 |
| 8-K |
Current report
Officer or director change
|
Feb 14, 2025 | Feb 13, 2025 |
| 10-Q | Quarterly report | Nov 14, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 13, 2024 | Nov 13, 2024 |
| 8-K |
Current report
Material agreement, New debt
|
Nov 5, 2024 | Nov 1, 2024 |
| 8-K/A |
Amended current report
Shareholder vote results
|
Aug 26, 2024 | Aug 23, 2024 |
| 8-K |
Current report
Change to shareholder rights, Bylaw or fiscal year change, Shareholder vote results, Regulation FD disclosure, Other events
|
Aug 23, 2024 | Aug 23, 2024 |
| 10-Q | Quarterly report | Aug 14, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 14, 2024 | Aug 14, 2024 |
| DEFR14A | Filing | Aug 8, 2024 | — |
| PRE 14A | Preliminary proxy statement | Jul 29, 2024 | Jul 26, 2024 |
| DEF 14A | Proxy statement | Jul 26, 2024 | Jul 26, 2024 |
| SD | Specialized disclosure (conflict minerals) | May 24, 2024 | — |
| 8-K |
Current report
Shareholder vote results
|
May 21, 2024 | May 21, 2024 |
| 10-Q | Quarterly report | May 8, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations
|
May 7, 2024 | May 7, 2024 |
| ARS | Annual report to shareholders | Apr 5, 2024 | Apr 5, 2024 |
| DEFA14A | Additional proxy material | Apr 5, 2024 | — |
| DEF 14A | Proxy statement | Apr 5, 2024 | Apr 5, 2024 |
| 10-K | Annual report | Mar 14, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Results of operations
|
Mar 13, 2024 | Mar 13, 2024 |
| 8-K |
Current report
Listing notice
|
Mar 8, 2024 | Mar 6, 2024 |
| S-8 | Employee stock plan registration | Feb 9, 2024 | — |
| 424B3 | Prospectus | Dec 15, 2023 | — |
| EFFECT | Filing | Dec 14, 2023 | — |
| CORRESP | Letter to the SEC | Dec 12, 2023 | — |
| CORRESP | Letter to the SEC | Dec 7, 2023 | — |
| S-3/A | Filing | Dec 7, 2023 | — |
| UPLOAD | Letter from the SEC | Nov 20, 2023 | — |
| S-3 | Shelf registration | Nov 14, 2023 | — |
| 10-Q | Quarterly report | Nov 14, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Results of operations
|
Nov 7, 2023 | Nov 7, 2023 |
| D | Filing | Sep 26, 2023 | — |
| 8-K |
Current report
Material agreement, Unregistered share sale, Regulation FD disclosure, Other events
|
Sep 25, 2023 | Sep 25, 2023 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Aug 29, 2023 | Aug 28, 2023 |
| 10-Q | Quarterly report | Aug 9, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 8, 2023 | Aug 8, 2023 |
| SD | Specialized disclosure (conflict minerals) | May 24, 2023 | — |
| 8-K |
Current report
Officer or director change, Bylaw or fiscal year change, Shareholder vote results
|
May 22, 2023 | May 22, 2023 |
| 10-Q | Quarterly report | May 10, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Results of operations
|
May 9, 2023 | May 9, 2023 |
| DEFA14A | Additional proxy material | May 3, 2023 | — |
| DEFA14A | Additional proxy material | May 3, 2023 | — |
| 8-K |
Current report
Auditor change
|
May 3, 2023 | May 3, 2023 |
| 8-K |
Current report
Auditor change
|
Apr 14, 2023 | Apr 10, 2023 |
| DEFA14A | Additional proxy material | Apr 7, 2023 | — |
| ARS | Annual report to shareholders | Apr 7, 2023 | Dec 31, 2022 |
| DEF 14A | Proxy statement | Apr 7, 2023 | May 19, 2023 |
| PRE 14A | Preliminary proxy statement | Mar 23, 2023 | May 19, 2023 |
| S-8 | Employee stock plan registration | Mar 2, 2023 | — |
| 10-K | Annual report | Mar 2, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Results of operations
|
Mar 1, 2023 | Mar 1, 2023 |
| 8-K |
Current report
Officer or director change
|
Nov 25, 2022 | Nov 25, 2022 |
| EFFECT | Filing | Nov 17, 2022 | — |
| EFFECT | Filing | Nov 17, 2022 | — |
| 424B3 | Prospectus | Nov 17, 2022 | — |
| CORRESP | Letter to the SEC | Nov 15, 2022 | — |
| UPLOAD | Letter from the SEC | Nov 10, 2022 | — |
| S-3 | Shelf registration | Nov 3, 2022 | — |
| POS AM | Filing | Nov 3, 2022 | — |
| 10-Q | Quarterly report | Nov 3, 2022 | Sep 30, 2022 |
| 8-K |
Current report
Results of operations, Officer or director change
|
Nov 3, 2022 | Nov 3, 2022 |
| 424B3 | Prospectus | Oct 27, 2022 | — |
| 8-K |
Current report
Bylaw or fiscal year change
|
Oct 24, 2022 | Oct 21, 2022 |
| 424B3 | Prospectus | Aug 26, 2022 | — |
| 8-K |
Current report
Officer or director change
|
Aug 26, 2022 | Aug 26, 2022 |
| 424B3 | Prospectus | Aug 12, 2022 | — |
| 10-Q | Quarterly report | Aug 12, 2022 | Jun 30, 2022 |
| 8-K |
Current report
Results of operations
|
Aug 11, 2022 | Aug 11, 2022 |
| 424B8 | Filing | Jun 30, 2022 | — |
| 8-K |
Current report
Shareholder vote results
|
Jun 2, 2022 | Jun 1, 2022 |
| 10-Q | Quarterly report | May 13, 2022 | Mar 31, 2022 |
| 8-K |
Current report
Results of operations
|
May 12, 2022 | May 12, 2022 |
| DEF 14A | Proxy statement | Apr 22, 2022 | Jun 1, 2022 |
| 8-K |
Current report
Other events
|
Mar 30, 2022 | Mar 30, 2022 |
| 424B3 | Prospectus | Mar 17, 2022 | — |
| EFFECT | Filing | Mar 16, 2022 | — |
| CORRESP | Letter to the SEC | Mar 14, 2022 | — |
| UPLOAD | Letter from the SEC | Mar 14, 2022 | — |
| S-1 | Registration statement | Mar 4, 2022 | — |
| S-8 | Employee stock plan registration | Mar 4, 2022 | — |
| 10-K | Annual report | Mar 4, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Results of operations
|
Feb 24, 2022 | Feb 24, 2022 |
| 8-K |
Current report
Officer or director change
|
Feb 17, 2022 | Feb 14, 2022 |
| RW | Filing | Feb 8, 2022 | — |
| S-1 | Registration statement | Dec 27, 2021 | — |
| 424B3 | Prospectus | Dec 20, 2021 | — |
| S-8 | Employee stock plan registration | Dec 15, 2021 | — |
| EFFECT | Filing | Dec 13, 2021 | — |
| POS AM | Filing | Dec 9, 2021 | — |
| 10-Q/A | Amended quarterly report | Dec 6, 2021 | Jun 30, 2021 |
| 10-Q/A | Amended quarterly report | Dec 6, 2021 | Mar 31, 2021 |
| 10-K/A | Amended annual report | Dec 3, 2021 | Dec 31, 2020 |
| 424B3 | Prospectus | Nov 23, 2021 | — |
| 424B3 | Prospectus | Nov 23, 2021 | — |
| 8-K/A | Amended current report | Nov 22, 2021 | Sep 30, 2021 |
| 8-K |
Current report
Results of operations, Auditor change, Restatement
|
Nov 22, 2021 | Nov 22, 2021 |
| 10-Q | Quarterly report | Nov 22, 2021 | Sep 30, 2021 |
| 424B3 | Prospectus | Nov 16, 2021 | — |
| NT 10-Q | Filing | Nov 16, 2021 | Sep 30, 2021 |
| 8-K |
Current report
Results of operations
|
Nov 16, 2021 | Nov 15, 2021 |
| 424B3 | Prospectus | Nov 15, 2021 | — |
| 8-K |
Current report
Other events
|
Nov 15, 2021 | Nov 9, 2021 |
| EFFECT | Filing | Nov 10, 2021 | — |
| 424B3 | Prospectus | Nov 10, 2021 | — |
| CORRESP | Letter to the SEC | Nov 8, 2021 | — |
| UPLOAD | Letter from the SEC | Nov 8, 2021 | — |
| 8-K |
Current report
Other events
|
Nov 5, 2021 | Oct 28, 2021 |
| S-1 | Registration statement | Nov 3, 2021 | — |
| 8-K |
Current report
Auditor change
|
Oct 28, 2021 | Oct 22, 2021 |
| 8-K |
Current report
Regulation FD disclosure
|
Oct 20, 2021 | Oct 20, 2021 |
| 8-K |
Current report
Material agreement, Acquisition or sale of assets, Listing notice, Unregistered share sale, Change to shareholder rights, Change in control, Officer or director change, Bylaw or fiscal year change
|
Oct 15, 2021 | Oct 8, 2021 |
Showing 200 filings, the most recent 200. 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.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
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)
Other Miscellaneous Electrical Machinery, Equipment & Supplies companies
- Cae Inc CAE
- EnerSys ENS
- Novanta Inc NOVT
- QuantumScape Corp QS
- Spectrum Brands Holdings, Inc. SPB
- Energizer Holdings, Inc. ENR
- InoBat B.V. INBT
- Amprius Technologies, Inc. AMPX
All 55 Miscellaneous Electrical Machinery, Equipment & Supplies companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.