<SEC-DOCUMENT>0001104659-25-029921-index.html : 20250331 <SEC-HEADER>0001104659-25-029921.hdr.sgml : 20250331 <ACCEPTANCE-DATETIME>20250331163221 ACCESSION NUMBER: 0001104659-25-029921 CONFORMED SUBMISSION TYPE: S-8 PUBLIC DOCUMENT COUNT: 6 FILED AS OF DATE: 20250331 DATE AS OF CHANGE: 20250331 EFFECTIVENESS DATE: 20250331 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: S-8 SEC ACT: 1933 Act SEC FILE NUMBER: 333-286268 FILM NUMBER: 25793856 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>S-8 <SEQUENCE>1 <FILENAME>tm2510717d1_s8.htm <DESCRIPTION>FORM S-8 <TEXT> Document 1 - file: tm2510717d1_s8.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-5.1 <SEQUENCE>2 <FILENAME>tm2510717d1_ex5-1.htm <DESCRIPTION>EXHIBIT 5.1 <TEXT> Document 2 - file: tm2510717d1_ex5-1.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-23.1 <SEQUENCE>3 <FILENAME>tm2510717d1_ex23-1.htm <DESCRIPTION>EXHIBIT 23.1 <TEXT> Document 3 - file: tm2510717d1_ex23-1.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-FILING FEES <SEQUENCE>4 <FILENAME>tm2510717d1_exfilingfees.htm <DESCRIPTION>EX-FILING FEES <TEXT> Document 4 - file: tm2510717d1_exfilingfees.htm
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>5 <FILENAME>image_003.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 5 - file: image_003.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>6 <FILENAME>image_004.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 6 - file: image_004.jpg
</DOCUMENT> </SEC-DOCUMENT>