ClearSign Technologies Corp SEC filings CLIR
ClearSign Technologies Corp has 794 filings in SEC EDGAR's recent list, going back to May 5, 2008. Its latest annual report, Form ARS, was filed on Apr 28, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 14, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Sep 14, 2026 (regulation fd disclosure). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| DEFA14A | Additional proxy material | Apr 28, 2026 | — |
| DEF 14A | Proxy statement | Apr 28, 2026 | Jun 8, 2026 |
| DEF 14A | Proxy statement | Feb 2, 2026 | Feb 26, 2026 |
| PRE 14A | Preliminary proxy statement | Jan 23, 2026 | Feb 26, 2026 |
| DEFA14A | Additional proxy material | Jul 11, 2025 | — |
| DEFA14A | Additional proxy material | Jun 13, 2025 | — |
| DEF 14A | Proxy statement | Jun 13, 2025 | Jul 25, 2025 |
| DEFA14A | Additional proxy material | Jun 20, 2024 | — |
| DEFA14A | Additional proxy material | Jun 10, 2024 | — |
| DEFA14A | Additional proxy material | May 10, 2024 | — |
| DEF 14A | Proxy statement | May 10, 2024 | Jun 25, 2024 |
| PRE 14A | Preliminary proxy statement | Apr 30, 2024 | Jun 25, 2024 |
| DEFA14A | Additional proxy material | Apr 25, 2023 | — |
| DEF 14A | Proxy statement | Apr 25, 2023 | Jun 6, 2023 |
| PRE 14A | Preliminary proxy statement | Apr 14, 2023 | Jun 6, 2023 |
| DEFA14A | Additional proxy material | Apr 22, 2022 | — |
| DEF 14A | Proxy statement | Apr 22, 2022 | Jun 6, 2022 |
| DEF 14A | Proxy statement | May 7, 2021 | Jun 17, 2021 |
| DEF 14A | Proxy statement | Apr 27, 2020 | Jun 17, 2020 |
| DEF 14A | Proxy statement | Apr 4, 2019 | May 8, 2019 |
| PRE 14A | Preliminary proxy statement | Mar 21, 2019 | Mar 21, 2019 |
| DEFA14A | Additional proxy material | Nov 13, 2018 | — |
| DEF 14A | Proxy statement | Apr 18, 2018 | May 3, 2018 |
| DEF 14A | Proxy statement | Mar 17, 2017 | May 4, 2017 |
| DEF 14A | Proxy statement | Mar 30, 2016 | May 5, 2016 |
| DEF 14A | Proxy statement | Mar 31, 2015 | May 7, 2015 |
| DEF 14A | Proxy statement | Mar 18, 2014 | May 6, 2014 |
| DEF 14A | Proxy statement | Mar 27, 2013 | May 2, 2013 |
Showing 28 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
- Industrial Instruments For Measurement, Display, and Control (SIC 3823)
- Listed as
- CLIR (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Tulsa, OK
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1434524
- Former names
- CLEARSIGN COMBUSTION CORP (until Oct 31, 2019)
Other Industrial Instruments For Measurement, Display, and Control companies
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All 18 Industrial Instruments For Measurement, Display, and Control companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.