ClearSign Technologies Corp — Director's Dealing 2026

Mar 3, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ClearSign Technologies Corp (CLIR)
CIK: 0001434524
Period of Report: 2026-02-26

Reporting Person: Hinds Brent (Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-26	Common Stock	A	56645	—	Acquired	191585	Direct
2026-02-26	Common Stock	F	20761	$0.5616	Disposed	170824	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-26	Restricted Stock Unit	$	A	47009	Acquired		Common Stock (47009)	Direct

Footnotes

F1: Represents a one-time bonus grant to the reporting person for services as an executive officer for the year ended December 31, 2025, upon achievement of certain performance target metrics approved by the human capital and compensation committee of the board of directors. The number of shares awarded is based on the closing price of the Company's common stock on February 26, 2026, of $0.5616.

F2: Represents the payment of the reporting person's tax liability by withholding shares incident to the receipt of the Company's common stock issued on February 26, 2026, based on the closing price of the Company's common stock on February 26, 2026, of $0.5616.

F3: Represents a one-time bonus restricted stock units ("RSUs") grant to reporting person for services as an executive officer for the year ended December 31, 2025, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof.

F4: The RSUs granted on February 26, 2026, vest in three equal installments commencing on the first anniversary of the grant date.