ClearSign Technologies Corp

None of the Company’sdirectors orofficers adopted, modified or terminated a Rule 10b-5 trading arrangement or a non-Rule 10b-5 trading arrangement during the fiscal quarter ended September 30, 2024, as such terms are defined under Item 408(a) of Regulation S-K.

**Disclosure Pursuant to Item 5.02 of Current Report on Form 8-K –**Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On November 13, 2024, the Human Capital and Compensation Committee (the “Compensation Committee”) of the Board of Directors (the “Board”) of ClearSign Technologies Corporation (the “Company”) approved (i) an increase to Colin James Deller’s, the Company’s Chief Executive Officer, annual bonus target from up to 60% to up to 80% of his annual base salary; and (ii) an increase to Brent Hinds’, the Company’s Chief Financial Officer, base salary from $200,000 to $220,000, with such increases to be effective as of January 1, 2025. The Board ratified the Compensation Committee’s approval on the same date. Except as described herein, there were no further changes to Dr. Deller’s and Mr. Hinds’ employment agreements.