Item 8.01 Other Events. On May 26, 2026, ClearSign Technologies Corporation (the “Company”) notified H.C. Wainwright & Co., LLC (“Wainwright”) that it suspended the use of and terminated the prospectus supplement filed with the Securities and Exchange Commission (the “SEC”) on July 17, 2025 (the “ATM Prospectus Supplement”), which forms a part of the Company’s “shelf” registration statement on Form S-3 (File No. 333-288736) that became effective on July 28, 2025, relating to the At The Market Offering Agreement, dated July 17, 2025, by and between the Company and Wainwright (the “ATM Agreement”), covering the sale of up to $10.39 million in shares of its common stock (the “ATM Shares”). Prior to the suspension and termination of the ATM Prospectus Supplement, no ATM Shares had been sold and all $10.39 million remained available for sale pursuant to the ATM Agreement and the ATM Prospectus Supplement. The Company will not make any sales of its shares of common stock pursuant to the ATM Agreement unless and until a new prospectus supplement is filed. Other than the suspension of the sales of the Company’s shares of common stock pursuant to the ATM Agreement and the termination of the related ATM Prospectus Supplement, the ATM Agreement remains in full force and effect. A copy of the ATM Agreement was filed as Exhibit 1.1 to the Company’s Current Report on Form 8-K filed with the SEC on July 18, 2025.
CLIR Clearsign Technologies Corp - 8-K
Accession
0001104659-26-0675178.019.01
Item 8.01 - Other Events
236 words
Item 9.01 - Financial Statements and Exhibits
23 words
Item 9.01 Financial Statements and Exhibits. (d) Exhibits. Exhibit No. Description 104 Cover Page Interactive Data File (embedded within the Inline XBRL document).