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ClearSign Combustion CorporationClearSign Combustion CorporationClearSign Combustion CorporationClearSign Combustion Corporation
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Our patented technologies, embedded in established OEM products as ClearSign Core™, and ClearSign Eye™ and other sensing configurations, enhance the performance of combustion systems and fuel safety systems in a broad range of markets, including the energy (upstream oil production and down-stream refining), commercial/industrial boiler, chemical, petrochemical, transport and power industries.

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YearTrailing 12-MonthsCalendar Year 2023Calendar Year 2022Calendar Year 2021Calendar Year 2020Calendar Year 2019Calendar Year 2018Calendar Year 2017Calendar Year 2016Calendar Year 2015Calendar Year 2014Calendar Year 2013Calendar Year 2012Calendar Year 2011Calendar Year 2008
ViewAll FilingsAnnual FilingsQuarterly FilingsCurrent FilingsRegistration StatementsSection 16Proxy & Information StatementsOther
FormDescriptionDateFormat
S-8Securities offered to employees pursuant to employee benefit plansNov 9, 2012Open Securities offered to employees pursuant to employee benefit plans in HTML.Open Securities offered to employees pursuant to employee benefit plans in DOC file.Open Securities offered to employees pursuant to employee benefit plans in PDF file.Open Securities offered to employees pursuant to employee benefit plans in XLS file.
424B3Form of prospectus reflecting facts events constituting substantive change from last formNov 8, 2012Open Form of prospectus reflecting facts events constituting substantive change from last form in HTML.Open Form of prospectus reflecting facts events constituting substantive change from last form in DOC file.Open Form of prospectus reflecting facts events constituting substantive change from last form in PDF file.Open Form of prospectus reflecting facts events constituting substantive change from last form in XLS file.
424B3Form of prospectus reflecting facts events constituting substantive change from last formAug 6, 2012Open Form of prospectus reflecting facts events constituting substantive change from last form in HTML.Open Form of prospectus reflecting facts events constituting substantive change from last form in DOC file.Open Form of prospectus reflecting facts events constituting substantive change from last form in PDF file.Open Form of prospectus reflecting facts events constituting substantive change from last form in XLS file.
424B3Form of prospectus reflecting facts events constituting substantive change from last formJul 31, 2012Open Form of prospectus reflecting facts events constituting substantive change from last form in HTML.Open Form of prospectus reflecting facts events constituting substantive change from last form in DOC file.Open Form of prospectus reflecting facts events constituting substantive change from last form in PDF file.Open Form of prospectus reflecting facts events constituting substantive change from last form in XLS file.
424B3Form of prospectus reflecting facts events constituting substantive change from last formMay 15, 2012Open Form of prospectus reflecting facts events constituting substantive change from last form in HTML.Open Form of prospectus reflecting facts events constituting substantive change from last form in DOC file.Open Form of prospectus reflecting facts events constituting substantive change from last form in PDF file.Open Form of prospectus reflecting facts events constituting substantive change from last form in XLS file.
424B3Form of prospectus reflecting facts events constituting substantive change from last formMay 1, 2012Open Form of prospectus reflecting facts events constituting substantive change from last form in HTML.Open Form of prospectus reflecting facts events constituting substantive change from last form in DOC file.Open Form of prospectus reflecting facts events constituting substantive change from last form in PDF file.Open Form of prospectus reflecting facts events constituting substantive change from last form in XLS file.
POS AMPost-effective amendment to an S-Type filingApr 25, 2012Open Post-effective amendment to an S-Type filing in HTML.Open Post-effective amendment to an S-Type filing in DOC file.Open Post-effective amendment to an S-Type filing in PDF file.Open Post-effective amendment to an S-Type filing in XLS file.
424B1Form of prospectus that discloses information previously omitted from the prospectusApr 25, 2012Open Form of prospectus that discloses information previously omitted from the prospectus in HTML.Open Form of prospectus that discloses information previously omitted from the prospectus in DOC file.Open Form of prospectus that discloses information previously omitted from the prospectus in PDF file.Open Form of prospectus that discloses information previously omitted from the prospectus in XLS file.
8-A12BRegistration of certain classes of securities 12(b) of the Securities Exchange ActApr 23, 2012Open Registration of certain classes of securities 12(b) of the Securities Exchange Act in HTML.Open Registration of certain classes of securities 12(b) of the Securities Exchange Act in DOC file.Open Registration of certain classes of securities 12(b) of the Securities Exchange Act in PDF file.Open Registration of certain classes of securities 12(b) of the Securities Exchange Act in XLS file.
S-1/AAmended Registration statement for face-amount certificate companiesApr 17, 2012Open Amended Registration statement for face-amount certificate companies in HTML.Open Amended Registration statement for face-amount certificate companies in DOC file.Open Amended Registration statement for face-amount certificate companies in PDF file.Open Amended Registration statement for face-amount certificate companies in XLS file.
S-1/AAmended Registration statement for face-amount certificate companiesApr 6, 2012Open Amended Registration statement for face-amount certificate companies in HTML.Open Amended Registration statement for face-amount certificate companies in DOC file.Open Amended Registration statement for face-amount certificate companies in PDF file.Open Amended Registration statement for face-amount certificate companies in XLS file.
S-1/AAmended Registration statement for face-amount certificate companiesMar 9, 2012Open Amended Registration statement for face-amount certificate companies in HTML.Open Amended Registration statement for face-amount certificate companies in DOC file.Open Amended Registration statement for face-amount certificate companies in PDF file.Open Amended Registration statement for face-amount certificate companies in XLS file.
S-1/AAmended Registration statement for face-amount certificate companiesFeb 7, 2012Open Amended Registration statement for face-amount certificate companies in HTML.Open Amended Registration statement for face-amount certificate companies in DOC file.Open Amended Registration statement for face-amount certificate companies in PDF file.Open Amended Registration statement for face-amount certificate companies in XLS file.
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  • Investors Home
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  • Company Information
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  • SEC Filings
    • All SEC Filings
    • Section 16 Filings
  • Corporate Governance
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    • Governance Documents
ClearSign Combustion Corporation