Form 4 for CLIR ClearSign Technologies Corp

Accepted 2026-02-04 00:00:00 ET · period of report 2026-02-02 · accession 0001104659-26-010395 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
D	2026-02-04	2026-02-02	CLIR	Hinds Brent	CFO	M - OptEx	—	+10.1K	128.0K	+9%	—
D	2026-02-04	2026-02-02	CLIR	Hinds Brent	CFO	F - Tax	$0.6	-3,711	124.3K	-3%	-$2,227
D	2026-02-04	2026-02-02	CLIR	Hinds Brent	CFO	M - OptEx	$0.00	-10.1K	10.1K	-50%	$0

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2026-02-02	M	A	10,127	—	127,967	D	—	—	(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.
2	Common	Common Stock	2026-02-02	F	D	3,711	$0.6	124,256	D	—	—	(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.
3	Derivative	Restricted Stock Unit	2026-02-02	M	D	10,127	$0.00	10,127	D	— · — to —	10,127 Common Stock	(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.