<SEC-DOCUMENT>0001014108-25-000018.txt : 20250219
<SEC-HEADER>0001014108-25-000018.hdr.sgml : 20250219
<ACCEPTANCE-DATETIME>20250219170552
ACCESSION NUMBER:		0001014108-25-000018
CONFORMED SUBMISSION TYPE:	SCHEDULE 13D/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20250219
DATE AS OF CHANGE:		20250219

SUBJECT COMPANY:	

	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
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13D/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-86820
		FILM NUMBER:		25641530

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			clirSPV LLC
		CENTRAL INDEX KEY:			0001747304
		ORGANIZATION NAME:           	
		IRS NUMBER:				825195800
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13D/A

	BUSINESS ADDRESS:	
		STREET 1:		119 WARREN AVE
		STREET 2:		3RD FLOOR
		CITY:			SPRING LAKE
		STATE:			NJ
		ZIP:			07762-1217
		BUSINESS PHONE:		7322820743

	MAIL ADDRESS:	
		STREET 1:		119 WARREN AVE
		STREET 2:		3RD FLOOR
		CITY:			SPRING LAKE
		STATE:			NJ
		ZIP:			07762-1217
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13D/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
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<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/schedule13D" xmlns:com="http://www.sec.gov/edgar/common">
<headerData>
<submissionType>SCHEDULE 13D/A</submissionType>
<previousAccessionNumber>0001062993-18-003059</previousAccessionNumber>
<filerInfo>
<filer>
<filerCredentials>
<cik>0001747304</cik>
<ccc>XXXXXXXX</ccc>
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<liveTestFlag>LIVE</liveTestFlag>



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<formData>
<coverPageHeader>
<amendmentNo>5</amendmentNo>
<securitiesClassTitle>Common Stock</securitiesClassTitle>
<dateOfEvent>02/14/2025</dateOfEvent>
<previouslyFiledFlag>false</previouslyFiledFlag>
<issuerInfo>
<issuerCIK>0001434524</issuerCIK>
<issuerCUSIP>185064102</issuerCUSIP>
<issuerName>ClearSign Technologies Corporation</issuerName>
<address>
<com:street1>8023 East 63rd Place</com:street1>
<com:street2>Suite 101</com:street2>
<com:city>Tulsa</com:city>
<com:stateOrCountry>OK</com:stateOrCountry>
<com:zipCode>74133</com:zipCode>
</address>
</issuerInfo>
<authorizedPersons>
<notificationInfo>
<personName>Robert T. Hoffman Sr.</personName>
<personPhoneNum>732-282-0743</personPhoneNum>
<personAddress>
<com:street1>c/o clirSPV LLC</com:street1>
<com:street2>119 Warren Avenue, 3rd Floor</com:street2>
<com:city>Spring Lake</com:city>
<com:stateOrCountry>NJ</com:stateOrCountry>
<com:zipCode>07762</com:zipCode>
</personAddress>
</notificationInfo>
</authorizedPersons>
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<reportingPersons>
<reportingPersonInfo>
<reportingPersonCIK>0001747304</reportingPersonCIK>
<reportingPersonName>clirSPV LLC</reportingPersonName>
<memberOfGroup>a</memberOfGroup>
<citizenshipOrOrganization>DE</citizenshipOrOrganization>
<soleVotingPower>0</soleVotingPower>
<sharedVotingPower>1714544</sharedVotingPower>
<soleDispositivePower>0</soleDispositivePower>
<sharedDispositivePower>1714544</sharedDispositivePower>
<aggregateAmountOwned>1714544</aggregateAmountOwned>
<isAggregateExcludeShares>N</isAggregateExcludeShares>
<percentOfClass>3.3</percentOfClass>
<typeOfReportingPerson>OO</typeOfReportingPerson>
<commentContent>(Delaware limited libility company</commentContent>
</reportingPersonInfo>
<reportingPersonInfo>
<reportingPersonCIK>0001749087</reportingPersonCIK>
<reportingPersonName>GPclirSPV LLC</reportingPersonName>
<memberOfGroup>a</memberOfGroup>
<citizenshipOrOrganization>DE</citizenshipOrOrganization>
<soleVotingPower>0</soleVotingPower>
<sharedVotingPower>1714544</sharedVotingPower>
<soleDispositivePower>0</soleDispositivePower>
<sharedDispositivePower>1714544</sharedDispositivePower>
<aggregateAmountOwned>1714544</aggregateAmountOwned>
<isAggregateExcludeShares>N</isAggregateExcludeShares>
<percentOfClass>3.3</percentOfClass>
<typeOfReportingPerson>OO</typeOfReportingPerson>
<commentContent>(Delaware limited liability company)</commentContent>
</reportingPersonInfo>
<reportingPersonInfo>
<reportingPersonCIK>0001748409</reportingPersonCIK>
<reportingPersonName>HOFFMAN Robert Thurston Sr</reportingPersonName>
<memberOfGroup>a</memberOfGroup>
<citizenshipOrOrganization>X1</citizenshipOrOrganization>
<soleVotingPower>534483</soleVotingPower>
<sharedVotingPower>1714544</sharedVotingPower>
<soleDispositivePower>534483</soleDispositivePower>
<sharedDispositivePower>1714544</sharedDispositivePower>
<aggregateAmountOwned>2249027</aggregateAmountOwned>
<isAggregateExcludeShares>N</isAggregateExcludeShares>
<percentOfClass>4.3</percentOfClass>
<typeOfReportingPerson>IN</typeOfReportingPerson>
</reportingPersonInfo>
<reportingPersonInfo>
<reportingPersonCIK>0001749086</reportingPersonCIK>
<reportingPersonName>Princeton Opportunity Management LLC</reportingPersonName>
<memberOfGroup>a</memberOfGroup>
<citizenshipOrOrganization>DE</citizenshipOrOrganization>
<soleVotingPower>0</soleVotingPower>
<sharedVotingPower>1714544</sharedVotingPower>
<soleDispositivePower>0</soleDispositivePower>
<sharedDispositivePower>1714544</sharedDispositivePower>
<aggregateAmountOwned>1714544</aggregateAmountOwned>
<isAggregateExcludeShares>N</isAggregateExcludeShares>
<percentOfClass>3.3</percentOfClass>
<typeOfReportingPerson>OO</typeOfReportingPerson>
<commentContent>(Delaware limited liability company)</commentContent>
</reportingPersonInfo>
</reportingPersons>
<items1To7>
<item1>
<securityTitle>Common Stock</securityTitle>
<issuerName>ClearSign Technologies Corporation</issuerName>
<issuerPrincipalAddress>
<com:street1>8023 East 63rd Place</com:street1>
<com:street2>Suite 101</com:street2>
<com:city>Tulsa</com:city>
<com:stateOrCountry>OK</com:stateOrCountry>
<com:zipCode>74133</com:zipCode>
</issuerPrincipalAddress>
</item1>
<item3>
<fundsSource>The responses to Item 3 contained in the Reporting Persons initial and subsequent filings on Schedule 13D are incorporated herein by this reference.&#13;
&#13;
As previously disclosed by the Company, pursuant to a Stock Purchase Agreement, dated July 12, 2018, between the Company and clirSPV LLC, as modified from time to time, clirSPV LLC has a right to purchase unregistered shares of the Company's common stock in a number that will allow it to maintain a 19.99% percentage ownership of the outstanding common stock of the Company, par value $0.0001 per share (the "common stock"), following an offering of the Company's securities, subject to certain exceptions, on terms and conditions no different from those offered to other purchasers (the "Participation Right").&#13;
&#13;
On June 24, 2024, following clirSPV LLC's notice to exercise its Participation Right, the Company entered into a securities purchase agreement (the "Securities Purchase Agreement") with clirSPV LLC whereby the Company issued an aggregate of (i) 3,907,000 shares of common stock, (ii) pre-funded warrants (the "Pre-Funded Warrants") to purchase up to 786,000 shares of common stock, and (iii) redeemable warrants (the "Private Warrants," together with the Pre-Funded Warrants, the "Warrants") to purchase up to 7,039,508 shares of common stock. To purchase such equities, clirSPV LLC used funds provided by its members.&#13;
&#13;
Subsequently, on June 26, 2024, the Company and clirSPV LLC entered into an Amendment to the Securities Purchase Agreement (the "Amendment") to provide for a revised allocation of the clirSPV LLC's subscription between shares of common stock and Pre-Funded Warrants in lieu thereof. Pursuant to the Amendment, the clirSPV LLC purchased: (i) 3,350,000 shares of Common Stock (the "Shares"), (ii) Pre-Funded Warrants to purchase up to 1,343,000 shares of common stock (the "Pre-Funded Warrant Shares") and (iii) Private Warrants to purchase up to 7,039,508 shares of Common Stock ("Private Warrant Shares," together with the Pre-Funded Warrant Shares, the "Warrant Shares"), for aggregate gross proceeds of approximately $4.3 million, which was paid for by clirSPV LLC by contributions made by members.&#13;
&#13;
The Private Warrants will be exercisable at an exercise price of $1.05 per share and are currently exercisable and will expire 5 years from the date of issuance. Additionally, the Company may redeem the Private Warrants once they become exercisable upon 30 days' advance notice if the closing price of the common stock reported equals to or exceeds $2.275 for any 20 business days within a 30 consecutive business-day period, provided that they may only be redeemed if there is an effective registration statement covering the resale of the Private Warrant Shares. The Pre-Funded Warrants are each exercisable for one share of common stock at an exercise price of $0.0001 per share and will expire when exercised in full. The Company is prohibited from effecting an exercise of any Pre-Funded Warrants to the extent that such exercise would result in the number of shares of common stock beneficially owned by clirSPV LLC and its affiliates exceeding 19.99%, at election of the holder) of the total number of shares of common stock outstanding immediately after giving effect to the exercise, which percentage may be increased or decreased at the holder's election not to exceed 19.99%.&#13;
&#13;
clirSPV LLC has given transfer instructions to VStock Transfer, LLC, the transfer agent of the Company, to transfer 8,968,313 shares of Company common stock held by it to certain of its Members excluding Manager. In addition, clirSPV LLC distributed to its members, other than Manager, Private Warrants to purchase up to 7,039,508 shares of Company common stock at $1.05 per share exercise price. clirSPV LLC has exercised Pre-Funded Warrants to purchase up to 1,343,000 shares of Company common stock at an exercise price equal to par value.</fundsSource>
</item3>
<item4>
<transactionPurpose>The responses to Item 4 contained in the Reporting Persons initial filing on Schedule 13D are incorporated herein by this reference.</transactionPurpose>
</item4>
<item5>
<percentageOfClassSecurities>The ownership percentages set forth above are based on 51,628,509 shares of Common Stock outstanding, or, in the case of Robert T. Hoffman, Sr., 51,815,009 shares outstanding (which assumes the exercise of options held by him).</percentageOfClassSecurities>
<numberOfShares>clirSPV LLC is the record holder of 1,714,544 shares of Common Stock assuming completion of transfers currently being effected through VStock as referenced above.&#13;
&#13;
Robert T. Hoffman Sr. is the Managing Member of GPclirSPV LLC, which is the Manager of clirSPV LLC. Robert T. Hoffman Sr. is the Manager of Princeton Opportunity Management LLC, which has an Investment Management Agreement with clirSPV LLC and shares the power to vote the securities beneficially owned by clirSPV LLC. As such, each of GPclirSPV LLC, Robert T. Hoffman and Princeton Opportunity Management LLC may be deemed to have or share beneficial ownership of the shares of Common Stock held directly by clirSPV LLC.&#13;
&#13;
Robert T. Hoffman Sr. has (i) a self-directed retirement account that holds 110,519 shares of Common Stock of the Company, (ii) 13,153 shares of Common Stock he received for service on the Board of Directors of the Company, (iii) 224,311 shares of Common Stock that were issued pursuant to restricted stock units upon his resignation as a member of the Board of Director and (iv) options to purchase up to 186,500 shares of common stock of the Company. Robert T. Hoffman Sr. has agreed that he would not have the right to acquire any shares of Common Stock from the Company, including upon the exercise of stock options, pre-funded warrants, and redeemable purchase warrants, to the extent that such issuance, when aggregated with any other Common Stock beneficially owned by him, clirSPV LLC and their Affiliates and any other Persons (as defined in the Agreement) or entities whose beneficial ownership of Common Stock would be aggregated with clirSPV LLC's for purposes of Section 13(d) of the Exchange Act (as defined in the Agreement) (including any shares held by any "group" of which the SPV is a member), would result in a "change of control" of the Company within the meaning of Nasdaq Listing Rule 5635(b), except that such limitation will not apply in the event that the Company obtains all necessary shareholder approvals for such issuance in accordance with the Nasdaq.</numberOfShares>
<transactionDesc>Except as described in Item 3, during the past 60 days none of the Reporting Persons or Related Persons has effected any transactions in Common Stock.</transactionDesc>
<listOfShareholders>Not applicable.</listOfShareholders>
<date5PercentOwnership>Not applicable.</date5PercentOwnership>
</item5>
</items1To7>
<signatureInfo>
<signaturePerson>
<signatureReportingPerson>clirSPV LLC</signatureReportingPerson>
<signatureDetails>
<signature>Robert T. Hoffman Sr.</signature>
<title>Robert T. Hoffman Sr./Manager</title>
<date>02/19/2025</date>
</signatureDetails>
</signaturePerson>
<signaturePerson>
<signatureReportingPerson>GPclirSPV LLC</signatureReportingPerson>
<signatureDetails>
<signature>Robert T. Hoffman Sr.</signature>
<title>Robert T. Hoffman Sr./Manager</title>
<date>02/19/2025</date>
</signatureDetails>
</signaturePerson>
<signaturePerson>
<signatureReportingPerson>HOFFMAN Robert Thurston Sr</signatureReportingPerson>
<signatureDetails>
<signature>Robert T. Hoffman Sr.</signature>
<title>Robert T. Hoffman Sr.</title>
<date>02/19/2025</date>
</signatureDetails>
</signaturePerson>
<signaturePerson>
<signatureReportingPerson>Princeton Opportunity Management LLC</signatureReportingPerson>
<signatureDetails>
<signature>Robert T. Hoffman Sr.</signature>
<title>Robert T. Hoffman Sr./Manager</title>
<date>02/19/2025</date>
</signatureDetails>
</signaturePerson>
</signatureInfo>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
