<SEC-DOCUMENT>0001104659-25-067457.txt : 20250711
<SEC-HEADER>0001104659-25-067457.hdr.sgml : 20250711
<ACCEPTANCE-DATETIME>20250711172012
ACCESSION NUMBER:		0001104659-25-067457
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20250711
DATE AS OF CHANGE:		20250711

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ClearSign Technologies Corp
		CENTRAL INDEX KEY:			0001434524
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL [3823]
		ORGANIZATION NAME:           	08 Industrial Applications and Services
		EIN:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35521
		FILM NUMBER:		251119727

	BUSINESS ADDRESS:	
		STREET 1:		8023 E. 63RD PLACE, SUITE 101
		CITY:			TULSA
		STATE:			OK
		ZIP:			74133
		BUSINESS PHONE:		(918) 236-6461

	MAIL ADDRESS:	
		STREET 1:		8023 E. 63RD PLACE, SUITE 101
		CITY:			TULSA
		STATE:			OK
		ZIP:			74133

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CLEARSIGN COMBUSTION CORP
		DATE OF NAME CHANGE:	20080507
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>tm2520697d2_defa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="text-align: center; margin-top: 0pt; margin-bottom: 0pt">&nbsp;</P>

<!-- Field: Rule-Page --><DIV STYLE="width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 2pt solid; border-bottom: Black 1pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --><P STYLE="text-align: center; margin-top: 0pt; margin-bottom: 0pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SCHEDULE 14A</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(RULE&nbsp;14a-101)</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>INFORMATION REQUIRED IN PROXY STATEMENT</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SCHEDULE 14A INFORMATION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Proxy Statement Pursuant to Section&nbsp;14(a)&nbsp;of
the</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Securities Exchange Act of 1934</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(Amendment No. )</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Filed by the Registrant <FONT STYLE="font-family: Wingdings">&#120;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Filed by a Party other than the Registrant <FONT STYLE="font-family: Wingdings">&#168;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Check the appropriate box:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Check the appropriate box:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 3%"><FONT STYLE="font-family: Wingdings">&#168;</FONT></TD>
    <TD STYLE="width: 97%"><FONT STYLE="font-size: 10pt">Preliminary Proxy Statement&nbsp;</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Wingdings; font-size: 10pt">&#168;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">Confidential, For Use of the Commission Only (as permitted by Rule&nbsp;14a-6(e)(2))</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Wingdings; font-size: 10pt">&#168;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">Definitive Proxy Statement</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Wingdings">&#120;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">Definitive Additional Materials</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Wingdings">&#168;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt">Soliciting Material Pursuant to &sect;240.14a-12</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 14pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>ClearSign Technologies Corporation</B></P>

<P STYLE="color: #333333; font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Name of Registrant as Specified
In Its Charter)</P>

<P STYLE="color: #333333; font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Name of Person(s) Filing Proxy Statement, if other
than the Registrant)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Payment of Filing Fee (Check all boxes that apply):</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="width: 3%"><FONT STYLE="font-family: Wingdings">&#120;</FONT>&nbsp;</TD>
    <TD STYLE="width: 96%"><FONT STYLE="font-size: 10pt">No fee required.</FONT>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Wingdings; font-size: 10pt">&uml;</FONT></TD>
    <TD STYLE="font-size: 10pt; text-align: justify"><FONT STYLE="font-size: 10pt">Fee paid previously with preliminary materials.</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Wingdings; font-size: 10pt">&uml;</FONT></TD>
    <TD STYLE="font-size: 10pt; text-align: justify"><FONT STYLE="font-size: 10pt; color: #231F20">Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<!-- Field: Rule-Page --><DIV STYLE="width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 1pt solid; border-bottom: Black 2pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<!-- Field: Page; Sequence: 1 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px"><B>UNITED
STATES</B>&nbsp;</P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px"><B>SECURITIES
AND EXCHANGE COMMISSION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px"><B>WASHINGTON,
D.C. 20549</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px"><B>&nbsp;</B></P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px"><B>FORM&nbsp;8-K</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px"><B>CURRENT
REPORT</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px"><B>Pursuant
to Section 13 or 15(d) of the</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px"><B>Securities
Exchange Act of 1934</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px"><B>Date
of report (Date of earliest event reported):&nbsp;June 27, 2025</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px"><B>CLEARSIGN
TECHNOLOGIES CORPORATION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px"><B>(Exact
name of registrant as specified in charter)</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <TR>
    <TD STYLE="vertical-align: top; width: 34%; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Delaware</B></FONT></TD>
    <TD STYLE="vertical-align: bottom; width: 1%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; width: 32%; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>001-35521</B></FONT></TD>
    <TD STYLE="vertical-align: bottom; width: 1%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; width: 32%; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>26-2056298</B></FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>(State or other jurisdiction of<BR>
incorporation)</B></FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>(Commission File Number)</B></FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>(IRS Employer<BR>
Identification No.)</B></FONT></TD></TR>
  </TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; color: rgb(0, 0, 0); text-align: center; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px"><B>8023
E. 63rd Place, Suite 101</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px"><B>Tulsa,&nbsp;Oklahoma&nbsp;74133</B></P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px">(Address
of Principal Executive Offices) (Zip Code)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; color: rgb(0, 0, 0); text-align: center; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px"><B>(918)&nbsp;236-6461</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px"><B>(Registrant's
telephone number, including area code)</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: justify; text-indent: 0px">Check the
appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the Registrant under any of
the following provisions (see General Instruction A.2 below).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-decoration-style: initial; text-transform: none; margin-top: 0pt; margin-bottom: 0pt"><FONT STYLE="font-family: Wingdings; font-size: 10pt">&uml;</FONT><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT> <FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</FONT></P>


<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-decoration-style: initial; text-transform: none; margin-top: 0pt; margin-bottom: 0pt"><FONT STYLE="font-family: Wingdings; font-size: 10pt">&uml;</FONT><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT> <FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR240.14a-12)</FONT></P>


<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-decoration-style: initial; text-transform: none; margin-top: 0pt; margin-bottom: 0pt"><FONT STYLE="font-family: Wingdings; font-size: 10pt">&uml;</FONT><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT> <FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)).</FONT></P>


<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-decoration-style: initial; text-transform: none; margin-top: 0pt; margin-bottom: 0pt"><FONT STYLE="font-family: Wingdings; font-size: 10pt">&uml;</FONT><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT> Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13(e)-4(c))</P>


<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">Securities registered pursuant
to Section 12(b) of the Act:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR>
    <TD STYLE="border-bottom: black 1pt solid; vertical-align: bottom; width: 34%; padding-top: 0.25pt; padding-right: 0.25pt; padding-left: 0.25pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Title of each class</B></FONT></TD>
    <TD STYLE="vertical-align: top; width: 1%; padding-top: 0.25pt; padding-right: 0.25pt; padding-left: 0.25pt">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid; vertical-align: bottom; width: 32%; padding-top: 0.25pt; padding-right: 0.25pt; padding-left: 0.25pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Trading Symbol(s)</B></FONT></TD>
    <TD STYLE="vertical-align: top; width: 1%; padding-top: 0.25pt; padding-right: 0.25pt; padding-left: 0.25pt">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid; vertical-align: top; width: 32%; padding-top: 0.25pt; padding-right: 0.25pt; padding-left: 0.25pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Name of each exchange on which<BR>
registered</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 0.25pt; padding-right: 0.25pt; padding-left: 0.25pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Common Stock</B></FONT></TD>
    <TD STYLE="padding-top: 0.25pt; padding-right: 0.25pt; padding-left: 0.25pt">&nbsp;</TD>
    <TD STYLE="padding-top: 0.25pt; padding-right: 0.25pt; padding-left: 0.25pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>CLIR</B></FONT></TD>
    <TD STYLE="padding-top: 0.25pt; padding-right: 0.25pt; padding-left: 0.25pt">&nbsp;</TD>
    <TD STYLE="padding-top: 0.25pt; padding-right: 0.25pt; padding-left: 0.25pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>The Nasdaq Stock Market LLC</B></FONT></TD></TR>
  </TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; color: rgb(0, 0, 0); text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify; margin: 0pt 0; color: rgb(0, 0, 0); text-indent: 0px">Indicate by check mark whether
the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (&sect;230.405 of this chapter) or
Rule 12b-2 of the Securities Exchange Act of 1934 (&sect;240.12b-2 of this chapter).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-align: right; text-decoration-style: initial; text-transform: none; margin-top: 0pt; margin-bottom: 0pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Emerging growth company&nbsp;</FONT><FONT STYLE="font-family: Wingdings; font-size: 10pt">&uml;</FONT></P>


<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: justify; text-indent: 0px">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.&nbsp;<FONT STYLE="font-family: Wingdings">&uml;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; color: rgb(0, 0, 0); text-indent: 0px"></P>

<!-- Field: Page; Sequence: 1 -->
    <DIV STYLE="border-bottom: Black 1pt solid; margin-top: 12pt; margin-bottom: 6pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; color: rgb(0, 0, 0); text-indent: 0px">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; background-color: white">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 96px; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item 8.01</B></FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Other Events.</B></FONT></TD></TR>
  </TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px; background-color: white">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; color: rgb(0, 0, 0); text-indent: 0px; background-color: white"><B><I>Changes
in Board Committee Composition</I></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: justify; text-indent: 0.5in; background-color: white">The
board of directors (the &ldquo;Board&rdquo;) of ClearSign Technologies Corporation (the &ldquo;Company&rdquo;) periodically reassesses
the membership of each Board committee based on the recommendation from the Nominating and Corporate Governance Committee of the Board
(the &ldquo;Governance Committee&rdquo;). Upon recommendation from the Governance Committee, the Board approved certain changes in committee
memberships, as described below, that became effective as of June&nbsp;27, 2025. As a result of such changes, the current composition
of the Board committees is as follows:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px; background-color: white"><U>Audit
and Risk Committee<SUP>(1)</SUP></U>:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px; background-color: white">Judith
S. Schrecker, Chairperson</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px; background-color: white">Louis
J. Basenese</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px; background-color: white">David
M. Maley</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px; background-color: white">G.
Todd Silva</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; color: rgb(0, 0, 0); text-indent: 0px; background-color: white">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; background-color: white">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 24px; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 24px; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(1)</FONT></TD>
    <TD STYLE="text-align: justify; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Ms.&nbsp;de Lacy resigned as a member of the Audit and Risk Committee of the Board (the &ldquo;Audit Committee&rdquo;) and Mr.&nbsp;Silva and Mr.&nbsp;Basenese were appointed to such committee. Mr.&nbsp;Maley will remain as a member of the Audit Committee until the end of his term, which will be immediately following the Company&rsquo;s 2025 annual meeting of stockholders.</FONT></TD></TR>
  </TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px; background-color: white"><U>Human
Capital and Compensation Committee<SUP>(2)</SUP></U>:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px; background-color: white">Louis
J. Basenese, Chairperson</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px; background-color: white">David
M. Maley</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px; background-color: white">Catharine
M. de Lacy</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px; background-color: white">Judith
Schrecker</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; background-color: white">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 24px; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 24px; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(2)</FONT></TD>
    <TD STYLE="text-align: justify; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Mr.&nbsp;Basenese was named Chairperson of the Human Capital and Compensation Committee of the Board (the &ldquo;Compensation Committee&rdquo;). Mr.&nbsp;Maley will remain as a member of the Compensation Committee until the end of his term, which will be immediately following the Company&rsquo;s 2025 annual meeting of stockholders.</FONT></TD></TR>
  </TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px; background-color: white"><U>Nominating
and Corporate Governance Committee<SUP>(3)</SUP></U>:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px; background-color: white">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px; background-color: white">Catharine
M. de Lacy, Chairperson</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px; background-color: white">David
M. Maley</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px; background-color: white">Judith
Schrecker</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px; background-color: white">G.
Todd Silva</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; background-color: white">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 24px; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 24px; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(3)</FONT></TD>
    <TD STYLE="text-align: justify; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Mr.&nbsp;Silva was appointed to the Governance Committee. Mr.&nbsp;Maley will remain as a member of the Governance Committee until the end of his term, which will be immediately following the Company&rsquo;s 2025 annual meeting of stockholders.</FONT></TD></TR>
  </TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; color: rgb(0, 0, 0); text-indent: 0px"></P>

<!-- Field: Page; Sequence: 2 -->
    <DIV STYLE="border-bottom: Black 1pt solid; margin-top: 12pt; margin-bottom: 6pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; color: rgb(0, 0, 0); text-indent: 0px">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; background-color: white">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 96px; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item 9.01</B></FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Financial Statements and Exhibits.</B></FONT></TD></TR>
  </TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px; background-color: white"><B>(d)&nbsp;Exhibits.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0 0pt 0.5in; text-align: justify; text-indent: 0px; background-color: white">(d)&nbsp;Exhibits.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; background-color: white; border-collapse: collapse">
  <TR>
    <TD STYLE="border-bottom: black 1pt solid; white-space: nowrap; vertical-align: top; width: 8%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Exhibit&nbsp;No.</B></FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: top; width: 1%">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid; white-space: nowrap; vertical-align: bottom; width: 91%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Description</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">104</FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Cover Page&nbsp;Interactive Data File (embedded within the Inline XBRL document).</FONT></TD></TR>
  </TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; color: rgb(0, 0, 0); text-indent: 0px"></P>

<!-- Field: Page; Sequence: 3 -->
    <DIV STYLE="border-bottom: Black 1pt solid; margin-top: 12pt; margin-bottom: 6pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; color: rgb(0, 0, 0); text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: center; text-indent: 0px; background-color: white"><B>SIGNATURE</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-align: justify; text-indent: 0.5in; background-color: white">Pursuant
to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Current Report to be signed on its behalf
by the undersigned hereunto duly authorized.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px; background-color: white">Dated:
July&nbsp;11, 2025</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0px">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; background-color: white; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="2"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>CLEARSIGN TECHNOLOGIES CORPORATION</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%">&nbsp;</TD>
    <TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 47%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">By:</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ Colin James Deller</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Name:</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Colin James Deller</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Title:</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Chief Executive Officer</FONT></TD></TR>
  </TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; color: rgb(0, 0, 0); margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; color: rgb(0, 0, 0); text-indent: 0.5in"></P>

<!-- Field: Page; Sequence: 4; Options: Last -->
    <DIV STYLE="border-bottom: Black 1pt solid; margin-top: 12pt; margin-bottom: 6pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; color: rgb(0, 0, 0); text-indent: 0.5in">&nbsp;</P>



<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
