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 |
|---|---|---|---|
| 8-K |
Current report
Regulation FD disclosure
|
Sep 14, 2026 | Sep 14, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Aug 20, 2026 | Aug 19, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Aug 11, 2026 | Aug 6, 2026 |
| 8-K |
Current report
Material agreement, Unregistered share sale, Regulation FD disclosure
|
Jul 23, 2026 | Jul 21, 2026 |
| 8-K |
Current report
Other events
|
Jul 6, 2026 | Jul 6, 2026 |
| 8-K |
Current report
Other events
|
Jun 18, 2026 | Jun 18, 2026 |
| 8-K |
Current report
Shareholder vote results
|
Jun 9, 2026 | Jun 8, 2026 |
| 8-K |
Current report
Material agreement, Other events
|
Jun 1, 2026 | May 28, 2026 |
| 8-K |
Current report
Other events
|
May 28, 2026 | May 26, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 21, 2026 | May 20, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Apr 10, 2026 | Apr 9, 2026 |
| 8-K |
Current report
Other events
|
Mar 30, 2026 | Mar 30, 2026 |
| 8-K |
Current report
Change to shareholder rights, Bylaw or fiscal year change, Regulation FD disclosure
|
Mar 10, 2026 | Mar 6, 2026 |
| 8-K |
Current report
Shareholder vote results
|
Mar 4, 2026 | Feb 26, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Feb 25, 2026 | Feb 24, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jan 7, 2026 | Jan 7, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 8, 2025 | Dec 8, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 21, 2025 | Nov 19, 2025 |
| 8-K |
Current report
Bylaw or fiscal year change, Other events
|
Nov 17, 2025 | Nov 11, 2025 |
| 8-K |
Current report
Listing notice
|
Sep 30, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Other events
|
Aug 29, 2025 | Aug 26, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Aug 15, 2025 | Aug 14, 2025 |
| 8-K |
Current report
Listing notice, Officer or director change, Other events
|
Aug 8, 2025 | Aug 4, 2025 |
| 8-K |
Current report
Shareholder vote results
|
Jul 28, 2025 | Jul 25, 2025 |
| 8-K |
Current report
Material agreement, Other events
|
Jul 18, 2025 | Jul 12, 2025 |
| 8-K |
Current report
Other events
|
Jul 11, 2025 | Jun 27, 2025 |
| 8-K |
Current report
Material agreement, Officer or director change, Regulation FD disclosure
|
May 27, 2025 | May 22, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 23, 2025 | May 21, 2025 |
| 8-K |
Current report
Results of operations, Listing notice, Regulation FD disclosure
|
Apr 4, 2025 | Apr 1, 2025 |
| 8-K |
Current report
Other events
|
Dec 9, 2024 | Dec 6, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 21, 2024 | Nov 20, 2024 |
| 8-K |
Current report
Listing notice
|
Oct 30, 2024 | Oct 30, 2024 |
| 8-K |
Current report
Exit or restructuring costs
|
Oct 1, 2024 | Oct 1, 2024 |
| 8-K/A |
Amended current report
Shareholder vote results
|
Aug 23, 2024 | Jun 24, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Aug 23, 2024 | Aug 21, 2024 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Aug 6, 2024 | Aug 1, 2024 |
| 8-K/A |
Amended current report
Shareholder vote results
|
Jun 28, 2024 | Jun 24, 2024 |
| 8-K |
Current report
Material agreement, Unregistered share sale, Bylaw or fiscal year change, Shareholder vote results
|
Jun 26, 2024 | Jun 24, 2024 |
| 8-K |
Current report
Officer or director change, Other events
|
Jun 20, 2024 | Jun 16, 2024 |
| 8-K |
Current report
Other events
|
Jun 7, 2024 | Jun 3, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 28, 2024 | May 23, 2024 |
| 8-K |
Current report
Unregistered share sale, Other events
|
May 10, 2024 | May 10, 2024 |
| 8-K |
Current report
Listing notice, Other events
|
May 3, 2024 | May 2, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure, Other events
|
Apr 25, 2024 | Apr 23, 2024 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure, Other events
|
Apr 24, 2024 | Apr 23, 2024 |
| 8-K |
Current report
Material agreement, Unregistered share sale
|
Apr 23, 2024 | Apr 22, 2024 |
| 8-K |
Current report
Material agreement, Unregistered share sale, Regulation FD disclosure
|
Apr 19, 2024 | Apr 19, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Feb 7, 2024 | Feb 7, 2024 |
| 8-K |
Current report
Material agreement
|
Jan 5, 2024 | Dec 30, 2023 |
| 8-K |
Current report
Listing notice
|
Nov 27, 2023 | Nov 24, 2023 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 15, 2023 | Nov 14, 2023 |
| 8-K |
Current report
Other events
|
Sep 22, 2023 | Sep 20, 2023 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Sep 1, 2023 | Aug 31, 2023 |
| 8-K |
Current report
Other events
|
Aug 29, 2023 | Aug 29, 2023 |
| 8-K |
Current report
Material agreement, Change to shareholder rights, Bylaw or fiscal year change, Regulation FD disclosure
|
Jun 15, 2023 | Jun 14, 2023 |
| 8-K |
Current report
Shareholder vote results
|
Jun 8, 2023 | Jun 6, 2023 |
| 8-K |
Current report
Other events
|
May 30, 2023 | May 25, 2023 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 24, 2023 | May 18, 2023 |
| 8-K |
Current report
Listing notice
|
May 2, 2023 | May 2, 2023 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Apr 7, 2023 | Apr 6, 2023 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Feb 24, 2023 | Feb 18, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 9, 2022 | Dec 1, 2022 |
| 8-K |
Current report
Listing notice
|
Nov 4, 2022 | Nov 1, 2022 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Sep 6, 2022 | Sep 1, 2022 |
| 8-K |
Current report
Officer or director change
|
Aug 2, 2022 | Jul 28, 2022 |
| 8-K |
Current report
Results of operations, Shareholder vote results, Regulation FD disclosure
|
Jun 7, 2022 | Jun 2, 2022 |
| 8-K |
Current report
Other events
|
Jun 1, 2022 | Jun 1, 2022 |
| 8-K |
Current report
Material agreement, Other events
|
May 31, 2022 | May 26, 2022 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Apr 8, 2022 | Apr 6, 2022 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 29, 2021 | Nov 23, 2021 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Oct 18, 2021 | Oct 18, 2021 |
| 8-K |
Current report
Results of operations, Bylaw or fiscal year change, Regulation FD disclosure
|
Sep 10, 2021 | Sep 8, 2021 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Jul 30, 2021 | Jul 29, 2021 |
| 8-K |
Current report
Auditor change
|
Jul 7, 2021 | Jul 1, 2021 |
| 8-K |
Current report
Results of operations, Shareholder vote results, Regulation FD disclosure
|
Jun 21, 2021 | Jun 15, 2021 |
| 8-K |
Current report
Officer or director change
|
Apr 23, 2021 | Apr 20, 2021 |
| 8-K/A |
Amended current report
Officer or director change
|
Mar 31, 2021 | Mar 4, 2021 |
| 8-K |
Current report
Results of operations
|
Mar 25, 2021 | Mar 23, 2021 |
| 8-K |
Current report
Officer or director change
|
Mar 8, 2021 | Mar 4, 2021 |
| 8-K |
Current report
Material agreement
|
Dec 23, 2020 | Dec 18, 2020 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 23, 2020 | Nov 19, 2020 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 17, 2020 | Sep 15, 2020 |
| 8-K |
Current report
Material agreement, Other events
|
Aug 21, 2020 | Aug 19, 2020 |
| 8-K |
Current report
Other events
|
Jul 13, 2020 | Jul 10, 2020 |
| 8-K |
Current report
Other events
|
Jul 1, 2020 | Jun 30, 2020 |
| 8-K |
Current report
Listing notice, Shareholder vote results
|
Jun 22, 2020 | Jun 17, 2020 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 18, 2020 | Jun 16, 2020 |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 21, 2020 | Apr 20, 2020 |
| 8-K |
Current report
Officer or director change, Bylaw or fiscal year change, Other events
|
Apr 17, 2020 | Apr 15, 2020 |
| 8-K |
Current report
Results of operations
|
Mar 13, 2020 | Mar 12, 2020 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure, Other events
|
Feb 20, 2020 | Feb 13, 2020 |
| 8-K |
Current report
Listing notice
|
Jan 17, 2020 | Jan 15, 2020 |
| 8-K |
Current report
Officer or director change
|
Jan 15, 2020 | Jan 9, 2020 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 15, 2019 | Nov 13, 2019 |
| 8-K |
Current report
Impairment
|
Sep 27, 2019 | Sep 25, 2019 |
| 8-K |
Current report
Material agreement
|
Aug 28, 2019 | Aug 26, 2019 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 16, 2019 | Aug 14, 2019 |
| 8-K |
Current report
Regulation FD disclosure
|
Jul 10, 2019 | Jul 10, 2019 |
| 8-K |
Current report
Other events
|
Jul 10, 2019 | Jul 9, 2019 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Jun 12, 2019 | Jun 11, 2019 |
| 8-K/A |
Amended current report
Shareholder vote results
|
Jun 5, 2019 | May 8, 2019 |
| 8-K |
Current report
Results of operations, Officer or director change, Shareholder vote results, Regulation FD disclosure
|
May 13, 2019 | May 8, 2019 |
| 8-K |
Current report
Results of operations
|
May 8, 2019 | May 8, 2019 |
| 8-K |
Current report
Listing notice
|
Apr 18, 2019 | Apr 17, 2019 |
| 8-K |
Current report
Officer or director change
|
Apr 2, 2019 | Apr 1, 2019 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Mar 19, 2019 | Mar 19, 2019 |
| 8-K |
Current report
Results of operations
|
Feb 20, 2019 | Feb 20, 2019 |
| 8-K |
Current report
Officer or director change, Other events
|
Feb 12, 2019 | Feb 6, 2019 |
| 8-K |
Current report
Material agreement, Officer or director change, Regulation FD disclosure
|
Jan 30, 2019 | Jan 24, 2019 |
| 8-K |
Current report
Material agreement, Officer or director change, Regulation FD disclosure
|
Jan 10, 2019 | Jan 8, 2019 |
| 8-K |
Current report
Material agreement, Officer or director change
|
Jan 10, 2019 | Jan 4, 2019 |
| 8-K |
Current report
Material agreement, Officer or director change
|
Jan 7, 2019 | Dec 31, 2018 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 8, 2018 | Nov 8, 2018 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Oct 9, 2018 | Oct 2, 2018 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure, Other events
|
Oct 1, 2018 | Oct 1, 2018 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 29, 2018 | Aug 29, 2018 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 13, 2018 | Aug 13, 2018 |
| 8-K |
Current report
Unregistered share sale, Officer or director change, Bylaw or fiscal year change, Regulation FD disclosure
|
Jul 20, 2018 | Jul 20, 2018 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Jul 17, 2018 | Jul 12, 2018 |
| 8-K |
Current report
Regulation FD disclosure
|
May 11, 2018 | May 11, 2018 |
| 8-K |
Current report
Shareholder vote results
|
May 4, 2018 | May 3, 2018 |
| 8-K |
Current report
Officer or director change
|
Apr 18, 2018 | Apr 12, 2018 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 27, 2018 | Mar 27, 2018 |
| 8-K |
Current report
Material agreement, Other events
|
Feb 26, 2018 | Feb 23, 2018 |
| 8-K |
Current report
Officer or director change
|
Feb 16, 2018 | Feb 16, 2018 |
| 8-K |
Current report
Officer or director change, Bylaw or fiscal year change
|
Feb 13, 2018 | Feb 8, 2018 |
| 8-K |
Current report
Officer or director change, Other events
|
Jan 22, 2018 | Jan 16, 2018 |
| 8-K |
Current report
Results of operations
|
Nov 17, 2017 | Nov 9, 2017 |
| 8-K |
Current report
Officer or director change
|
Nov 2, 2017 | Oct 30, 2017 |
| 8-K |
Current report
Material agreement, Officer or director change
|
Sep 8, 2017 | Sep 7, 2017 |
| 8-K |
Current report
Results of operations
|
Aug 15, 2017 | Aug 14, 2017 |
| 8-K |
Current report
Officer or director change
|
Jun 27, 2017 | Jun 23, 2017 |
| 8-K |
Current report
Material agreement, Officer or director change, Regulation FD disclosure
|
May 11, 2017 | May 11, 2017 |
| 8-K |
Current report
Shareholder vote results
|
May 5, 2017 | May 4, 2017 |
| 8-K |
Current report
Officer or director change
|
Apr 21, 2017 | Apr 19, 2017 |
| 8-K |
Current report
Officer or director change
|
Apr 13, 2017 | Feb 7, 2017 |
| 8-K |
Current report
Officer or director change, Other events
|
Mar 15, 2017 | Mar 15, 2017 |
| 8-K |
Current report
Material agreement, Officer or director change, Regulation FD disclosure
|
Feb 14, 2017 | Feb 10, 2017 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Jan 26, 2017 | Jan 25, 2017 |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 24, 2017 | Jan 24, 2017 |
| 8-K/A | Amended current report | Jan 24, 2017 | Dec 7, 2016 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure, Other events
|
Dec 7, 2016 | Dec 7, 2016 |
| 8-K |
Current report
Results of operations
|
Nov 15, 2016 | Nov 14, 2016 |
| 8-K |
Current report
Officer or director change
|
Aug 23, 2016 | Aug 23, 2016 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 11, 2016 | Aug 11, 2016 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 28, 2016 | Jun 28, 2016 |
| 8-K |
Current report
Regulation FD disclosure
|
May 12, 2016 | May 12, 2016 |
| 8-K |
Current report
Shareholder vote results
|
May 10, 2016 | May 5, 2016 |
| 8-K |
Current report
Officer or director change
|
Mar 22, 2016 | Mar 21, 2016 |
| 8-K |
Current report
Results of operations
|
Mar 3, 2016 | Mar 3, 2016 |
| 8-K |
Current report
Officer or director change, Other events
|
Feb 12, 2016 | Feb 9, 2016 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 12, 2015 | Nov 12, 2015 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 13, 2015 | Aug 13, 2015 |
| 8-K |
Current report
Officer or director change
|
Aug 5, 2015 | Jul 30, 2015 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 3, 2015 | Jun 3, 2015 |
| 8-K |
Current report
Regulation FD disclosure
|
May 14, 2015 | May 14, 2015 |
| 8-K |
Current report
Shareholder vote results
|
May 11, 2015 | May 7, 2015 |
| 8-K |
Current report
Regulation FD disclosure
|
Feb 26, 2015 | Feb 26, 2015 |
| 8-K |
Current report
Regulation FD disclosure
|
Feb 13, 2015 | Feb 12, 2015 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Feb 12, 2015 | Feb 6, 2015 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure, Other events
|
Feb 5, 2015 | Feb 4, 2015 |
| 8-K |
Current report
Officer or director change
|
Feb 5, 2015 | Feb 3, 2015 |
| 8-K |
Current report
Material agreement, Officer or director change, Regulation FD disclosure
|
Dec 12, 2014 | Dec 10, 2014 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 13, 2014 | Nov 13, 2014 |
| 8-K |
Current report
Results of operations
|
Aug 12, 2014 | Aug 12, 2014 |
| 8-K |
Current report
Regulation FD disclosure
|
May 9, 2014 | May 8, 2014 |
| 8-K |
Current report
Shareholder vote results, Other events
|
May 8, 2014 | May 6, 2014 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 11, 2014 | Mar 11, 2014 |
| 8-K |
Current report
Material agreement, Other events
|
Feb 28, 2014 | Feb 27, 2014 |
| 8-K |
Current report
Results of operations
|
Nov 12, 2013 | Nov 11, 2013 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 15, 2013 | Aug 14, 2013 |
| 8-K |
Current report
Regulation FD disclosure
|
May 6, 2013 | May 6, 2013 |
| 8-K |
Current report
Regulation FD disclosure
|
May 6, 2013 | May 6, 2013 |
| 8-K |
Current report
Regulation FD disclosure
|
Feb 22, 2013 | Feb 22, 2013 |
| 8-K |
Current report
Officer or director change
|
Jan 22, 2013 | Jan 17, 2013 |
| 8-K |
Current report
Officer or director change
|
Jan 18, 2013 | Dec 28, 2012 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 8, 2012 | Nov 8, 2012 |
| 8-K |
Current report
Regulation FD disclosure
|
Oct 11, 2012 | Oct 11, 2012 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 27, 2012 | Sep 27, 2012 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 27, 2012 | Aug 27, 2012 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 24, 2012 | Aug 23, 2012 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 21, 2012 | Aug 21, 2012 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 16, 2012 | Aug 16, 2012 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 6, 2012 | Aug 6, 2012 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 2, 2012 | Aug 2, 2012 |
| 8-K |
Current report
Regulation FD disclosure
|
Jul 30, 2012 | Jul 30, 2012 |
| 8-K |
Current report
Other events
|
Jun 28, 2012 | Jun 28, 2012 |
| 8-K |
Current report
Other events
|
Jun 19, 2012 | Jun 19, 2012 |
| 8-K |
Current report
Results of operations
|
Jun 11, 2012 | Jun 11, 2012 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 5, 2012 | Jun 4, 2012 |
| 8-K |
Current report
Other events
|
May 15, 2012 | May 15, 2012 |
| 8-K |
Current report
Other events
|
Apr 30, 2012 | Apr 30, 2012 |
| 8-K |
Current report
Other events
|
Apr 25, 2012 | Apr 24, 2012 |
Showing 193 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
- Danaher Corp /DE/ DHR
- Ametek INC/ AME
- Keysight Technologies, Inc. KEYS
- Roper Technologies Inc ROP
- Fortive Corp FTV
- MKS Inc MKSI
- Cognex Corp CGNX
- Ralliant Corp RAL
All 18 Industrial Instruments For Measurement, Display, and Control companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.