{"url_path":"/sec/clir/8-k/2026-06-09/cover-page","section_key":"cover-page","section_title":"Cover Page","topic":"sec","document":{"doc_type":"8-K","doc_date":"2026-06-09","source_url":"https://www.sec.gov/Archives/edgar/data/1434524/0001104659-26-071865-index.html","accession_number":"0001104659-26-071865","cik":"0001434524","ticker":"CLIR","issuer_name":"ClearSign Technologies Corp","edgar_url":"https://www.sec.gov/Archives/edgar/data/1434524/0001104659-26-071865-index.html","primary_entity_key":"0001434524","primary_entity_name":"ClearSign Technologies Corp"},"word_count":301,"has_tables":true,"body_markdown":"false\n0001434524\n\n0001434524\n\n2026-06-08\n2026-06-08\n\niso4217:USD\n\nxbrli:shares\n\niso4217:USD\n\nxbrli:shares\n\n \n\n \n\n**UNITED STATES** \n\n**SECURITIES AND EXCHANGE COMMISSION**\n\n**WASHINGTON, D.C. 20549**\n\n** **\n\n**FORM 8-K**\n\n \n\n**CURRENT REPORT**\n\n**Pursuant to Section 13 or 15(d) of the**\n\n**Securities Exchange Act of 1934**\n\n \n\n**Date of report (Date of earliest event reported):\nJune 8, 2026**\n\n \n\n**CLEARSIGN TECHNOLOGIES CORPORATION**\n\n**(Exact name of registrant as specified in charter)**\n\n \n\n**Delaware**\n \n**001-35521**\n \n**26-2056298**\n\n**(State or other jurisdiction of\n\nincorporation)**\n\n \n**(Commission File Number)**\n \n**(IRS Employer\n\nIdentification No.)**\n\n \n\n**8023 E. 63rd Place, Suite 101**\n\n**Tulsa****,\nOklahoma 74133**\n\n(Address of principal executive offices\nand zip code)\n\n \n\n**(918) 500-7312**\n\n**(Registrant's telephone number, including area code)**\n\n \n\nCheck the appropriate box below if the Form 8-K filing is intended\nto simultaneously satisfy the filing obligation of the Registrant under any of the following provisions (see General Instruction A.2 below).\n\n \n\n¨ \nWritten communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)\n\n \n\n¨ \nSoliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR240.14a-12)\n\n \n\n¨ \nPre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))\n\n \n\n¨ \n\nPre-commencement communications pursuant to Rule 13e-4(c) under the\nExchange Act (17 CFR 240.13e-4(c))\n\n \n\nSecurities registered pursuant to Section 12(b) of the Act:\n\n \n\n**Title of each class**\n \n**Trading Symbol(s)**\n \n**Name\nof each exchange on which\nregistered**\n\n**Common Stock**\n \n**CLIR**\n \n**The Nasdaq Stock Market LLC**\n\n \n\nIndicate by check mark whether the registrant is an emerging growth\ncompany as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange\nAct of 1934 (§240.12b-2 of this chapter).\n\n \n\nEmerging growth\ncompany ¨\n\n \n\nIf an emerging growth company, indicate by check mark if the registrant\nhas elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant\nto Section 13(a) of the Exchange Act. ¨"}