{"url_path":"/sec/clir/10-q/2026/item-6","section_key":"item-6","section_title":"Item 6 **","topic":"sec","document":{"doc_type":"10-Q","doc_date":"2026-05-15","source_url":"https://www.sec.gov/Archives/edgar/data/1434524/0001104659-26-061940-index.html","accession_number":"0001104659-26-061940","cik":"0001434524","ticker":"CLIR","issuer_name":"ClearSign Technologies Corp","edgar_url":"https://www.sec.gov/Archives/edgar/data/1434524/0001104659-26-061940-index.html","primary_entity_key":"0001434524","primary_entity_name":"ClearSign Technologies Corp"},"word_count":537,"has_tables":true,"body_markdown":"**Item 6.**\n\n​\n\n**Exhibit**\n\nEXHIBITS\n\n​\n\n​\n\n**Number**\n\n**Document**\n\n​\n\n​\n\n3.1\n\n[Certificate of Incorporation of ClearSign Technologies Corporation, a Delaware corporation (incorporated by reference to Exhibit 3.3 of the Company’s Form 8-K filed with the Securities and Exchange Commission on June 15, 2023).](https://www.sec.gov/Archives/edgar/data/1434524/000110465923071426/tm2318661d1_ex3-3.htm)\n\n​\n\n​\n\n3.2\n\n[Certificate of Amendment, as filed with the Secretary of the State of Delaware on June 25, 2024 (incorporated by reference to Exhibit 3.1 of the Company’s Form 8-K filed with the Securities and Exchange Commission on June 26, 2024).](https://www.sec.gov/Archives/edgar/data/1434524/000110465924075194/tm2418248d1_ex3-1.htm)\n\n​\n\n​\n\n3.3\n\n[Certificate of Amendment to Certificate of Incorporation, as amended, of ClearSign Technologies Corporation, filed with the Secretary of State of the State of Delaware on March 6, 2026 (incorporated by reference to Exhibit 3.1 of the Company’s Form 8-K filed with the Securities and Exchange Commission on March 10, 2026).](https://www.sec.gov/Archives/edgar/data/1434524/000110465926025867/tm268062d1_ex3-1.htm)\n\n​\n\n​\n\n3.4\n\n[Amended and Restated Bylaws of ClearSign Technologies Corporation, a Delaware corporation (incorporated by reference to Exhibit 3.1 of the Company’s Form 8-K filed with the Securities and Exchange Commission on November 17, 2025).](https://www.sec.gov/Archives/edgar/data/1434524/000110465925113241/tm2531444d1_ex3-1.htm)\n\n​\n\n​\n\n4.1\n\n[Form of Common Warrant (incorporated by reference to Exhibit 4.1 of the Company’s Form 8-K filed with the Securities and Exchange Commission on April 19, 2024)](https://www.sec.gov/Archives/edgar/data/1434524/000110465924049160/tm2412212d1_ex4-1.htm).\n\n​\n\n​\n\n4.2\n\n[Form of Underwriter’s Warrant (incorporated by reference to Exhibit 4.2 of the Company’s Form 8-K filed with the Securities and Exchange Commission on April 19, 2024).](https://www.sec.gov/Archives/edgar/data/1434524/000110465924049160/tm2412212d1_ex4-2.htm)\n\n​\n\n​\n\n4.3\n\n[Form of Private Warrant (incorporated by reference to Exhibit 4.3 of the Company’s Form 8-K filed with the Securities and Exchange Commission on April 19, 2024).](https://www.sec.gov/Archives/edgar/data/1434524/000110465924049160/tm2412212d1_ex4-3.htm)\n\n​\n\n​\n\n4.4\n\n[Form of Pre-Funded Warrant (incorporated by reference to Exhibit 4.1 of the Company’s Form 8-K filed with the Securities and Exchange Commission on April 23, 2024).](https://www.sec.gov/Archives/edgar/data/1434524/000110465924050306/tm2412465d1_ex4-1.htm)\n\n​\n\n​\n\n4.5\n\n[Form of Placement Agent Warrant (incorporated by reference to Exhibit 4.4 of the Company’s Form 8-K filed with the Securities and Exchange Commission on April 19, 2024).](https://www.sec.gov/Archives/edgar/data/1434524/000110465924049160/tm2412212d1_ex4-4.htm)\n\n​\n\n​\n\n31.1*\n\n[Rule 13a-14(a)/15d-14(a) Certification of Principal Executive Officer](clir-20260331xex31d1.htm).\n\n​\n\n​\n\n31.2*\n\n[Rule 13a-14(a)/15d-14(a) Certification of Principal Financial Officer](clir-20260331xex31d2.htm).\n\n​\n\n​\n\n32.1**\n\n[Section 1350 Certification of Principal Executive Officer and Principal Financial Officer](clir-20260331xex32d1.htm).\n\n25\n\n[Table of Contents](#TOC)\n\n101.INS*\n\nInline XBRL Instance Document.\n\n101.SCH*\n\nInline XBRL Taxonomy Extension Schema Document.\n\n101.CAL*\n\nInline XBRL Taxonomy Extension Calculation Linkbase Document.\n\n101.DEF*\n\nInline XBRL Taxonomy Extension Definition Linkbase Document.\n\n101.LAB*\n\nInline XBRL Taxonomy Extension Label Linkbase Document.\n\n101.PRE*\n\nInline XBRL Taxonomy Extension Presentation Linkbase Document.\n\n104*\n\nCover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101).\n\n​\n\n*Filed herewith.\n\n**Furnished herewith.\n\n​\n\n26\n\n[Table of Contents](#TOC)\n\n​\n\n​\n\nSIGNATURES\n\n​\n\nPursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.\n\n​\n\n​\n\n​\n\n**CLEARSIGN TECHNOLOGIES CORPORATION**\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\nDate: May 15, 2026\n\nBy:\n\n/s/ Colin James Deller\n\n​\n\n​\n\nColin James Deller\n\n​\n\n​\n\nChief Executive Officer\n\n​\n\n​\n\n(Principal Executive Officer)\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\nDate: May 15, 2026\n\nBy:\n\n/s/ Brent Hinds\n\n​\n\n​\n\nBrent Hinds\n\n​\n\n​\n\nChief Financial Officer\n\n(Principal Financial and Accounting Officer)\n\n​\n\n​\n\n​\n\n27"}