UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM
CURRENT REPORT
Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934
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Securities registered pursuant to Section 12(b) of the Act:
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Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).
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If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨
| Item 7.01 | Regulation FD Disclosure. |
On December 8, 2025, ClearSign Technologies Corporation (the “Company”) posted an investor presentation on its website intended for use in upcoming meetings and conferences with investors, analysts and other interested parties. The presentation can be accessed at the “Events & Presentations” tab of the “Investors” section of the Company’s website at https://ir.clearsign.com/events-and-presentations.
The information furnished under this Item 7.01 of this Current Report on Form 8-K shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and shall not be incorporated by reference into any filings made by the Company pursuant to the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.
| Item 9.01 | Financial Statements and Exhibits. |
(d) Exhibits.
| Exhibit No. | Description | |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document). |
SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this Current Report to be signed on its behalf by the undersigned hereunto duly authorized.
Dated: December 8, 2025
| CLEARSIGN TECHNOLOGIES CORPORATION | ||
| By: | /s/ Colin James Deller | |
| Name: | Colin James Deller | |
| Title: | Chief Executive Officer | |