Brent Hinds - 02 Feb 2026 Form 4 Insider Report for ClearSign Technologies Corp (CLIR)

Role
Chief Financial Officer
Signature
/s/ Brent Hinds
Issuer symbol
CLIR
Transactions as of
02 Feb 2026
Net transactions value
-$2,223
Form type
4
Filing time
04 Feb 2026, 18:00:11 UTC
Previous filing
25 Feb 2025
Next filing
24 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Hinds Brent Chief Financial Officer 8023 E. 63RD PLACE, SUITE 101, TULSA /s/ Brent Hinds 04 Feb 2026 0001888082

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction CLIR Common Stock Options Exercise +10,127 +8.6% 127,967 02 Feb 2026 Direct F1
transaction CLIR Common Stock Tax liability $2,223 -3,711 -2.9% $0.5991 124,256 02 Feb 2026 Direct F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction CLIR Restricted Stock Unit Options Exercise $0 -10,127 -50% $0.000000 10,127 02 Feb 2026 Common Stock 10,127 Direct F3, F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Reflects the vesting of 10,127 restricted stock units ("RSUs") out of the 30,380 RSUs granted to the reporting person on February 2, 2023, into an equal number of shares of the Company's common stock, without the payment of any consideration, pursuant to the Company's 2021 Equity Incentive Plan.
F2 Represents the payment of the reporting person's tax liability by withholding shares in connection with the vesting of 10,127 RSUs on February 2, 2026, and calculated based on the closing price of the Company's common stock, as reported on the Nasdaq Stock Market, on February 2, 2026, of $0.5991.
F3 On February 2, 2023, the reporting person was granted 30,380 RSUs as a one-time bonus for services as an executive officer for the year ended December 31, 2022, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof.
F4 The RSUs granted on February 2, 2023, vest in three equal installments that commenced on February 2, 2024.