ClearSign Technologies Corp

For the period ended Jun 30, 2025. Filed Aug 14, 2025.

About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Jun 30, 2025 · Filed Aug 14, 2025

CLIR$2.39+1.4%Stored close · as of Nov 9, 2026

Extracted filing text, with the paragraph anchors used by the comparison.

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Contents

Item 6. Exhibits

Item 6.Exhibit	EXHIBITS
Number		Document

3.1		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).

3.2		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).

3.3		Bylaws of ClearSign Technologies Corporation, a Delaware corporation (incorporated by reference to Exhibit 3.4 of the Company’s Form 8-K filed with the Securities and Exchange Commission on June 15, 2023).
4.1		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).

4.2		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).

4.3		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).

4.4		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).

4.5		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).

10.1		Cooperation Agreement, dated May 22, 2025, by and between ClearSign Technologies Corporation and Richard D. Clarkson (incorporated by reference to Exhibit 10.1 of the Company’s Form 8-K filed with the Securities and Exchange Commission on May 27, 2025).

10.2		Cooperation Agreement, dated May 22, 2025, by and between ClearSign Technologies Corporation and Anthony DiGiandomenico (incorporated by reference to Exhibit 10.2 of the Company’s Form 8-K filed with the Securities and Exchange Commission on May 27, 2025).

10.3+		Louis J. Basenese’s Offer Letter, effective as of May 22, 2025 (incorporated by reference to Exhibit 10.3 of the Company’s Form 8-K filed with the Securities and Exchange Commission on May 27, 2025).

10.4+		Anthony DiGiandomenico’s Offer Letter, effective as of May 22, 2025 (incorporated by reference to Exhibit 10.4 of the Company’s Form 8-K filed with the Securities and Exchange Commission on May 27, 2025).

31.1*		Rule 13a-14(a)/15d-14(a) Certification of Principal Executive Officer.

31.2*		Rule 13a-14(a)/15d-14(a) Certification of Principal Financial Officer.


32.1**		Section 1350 Certification of Principal Executive Officer and Principal Financial Officer.
101.INS*		Inline XBRL Instance Document.
101.SCH*		Inline XBRL Taxonomy Extension Schema Document.
101.CAL*		Inline XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF*		Inline XBRL Taxonomy Extension Definition Linkbase Document.
101.LAB*		Inline XBRL Taxonomy Extension Label Linkbase Document.
101.PRE*		Inline XBRL Taxonomy Extension Presentation Linkbase Document.
104*		Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101).

*Filed herewith.

**Furnished herewith.

Agreement with management or compensatory plan or arrangement.

ContentsView on SEC.gov

The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.