Insider Transactions Reported by 13 Insiders of ClearSign Technologies Corp

Symbol: CLIR on Nasdaq
Location: Tulsa, OK

Key facts

CLIR - ClearSign Technologies Corp has 13 insiders with reported activity on this page.
Net insider value flow over the last year: +$10,569.
Recent transaction rows are available for direct filing-level review.

Change

Buy value: $10,569; sell value: $0.
Net share flow: +2,000.

Research use

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Evidence

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

Net insider flow leans to buying over the last 12 months. Net value: +$10,569.

Buys

$10,569

Shares: 2,000

Insiders: 1

Sells

Shares: 0

Insiders: 0

Net

+$10,569

Shares: +2,000

Insiders: 1

Window (months)	Buy shares	Buy $	Sell $	Net $
0-3	2,000	$10,569	$0	+$10,569
3-6	0	$0	$0	$0
6-9	0	$0	$0	$0
9-12	0	$0	$0	$0

ClearSign Technologies Corp executives and other stock owners filed with the SEC include:

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
Robert T. Hoffman Sr.	10%+ Owner	$17,451,117			Mixed	24 Jun 2024
John M. Pasquesi	10%+ Owner	$6,742,758			Mixed	14 Feb 2025
Anthony DiGiandomenico	Director	$332,131			Mixed	31 Mar 2026
Judith S. Schrecker	Director	$308,297			Mixed	01 Jul 2025
Colin J. Deller	Chief Executive Officer, Director	$155,492			Mixed	26 Feb 2026
Catharine de Lacy	Director	$149,314			Mixed	01 Jul 2025
Gary J. DiElsi	Director	$129,912			Mixed	02 Oct 2023
Brent Hinds	Chief Financial Officer	$108,897			Mixed	26 Feb 2026
G. Todd Silva	Director	$80,264	+$10,569	+15%	Mixed	23 Apr 2026
David M. Maley	Director	$76,735			Mixed	01 Jul 2025
Susanne Meline	Director	$48,014			Mixed	03 Jan 2023
Bruce A. Pate	Director	$16,019			Mixed	01 Jul 2022
Lou Basenese	Director	$12,200			Mixed	31 Mar 2026

Top shareholders of ClearSign Technologies Corp (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
John M. Pasquesi	3/4/5 13D/G	10%+ Owner	20% from 13D/G	8,434,774	$6,742,758	—	14 Feb 2025	3/4/5 13D/G
clirSPV LLC	13D/G	HOFFMAN Robert Thurston Sr	4.3%	2,249,027	$1,371,906	$0	14 Feb 2025	13D/G
Colin J. Deller	3/4/5	Chief Executive Officer, Director	0.06%	31,466	$155,492	—	26 Feb 2026	3/4/5
Robert T. Hoffman Sr.	3/4/5	10%+ Owner	— mixed-class rows	24,795,027 mixed-class rows	$17,451,117	—	24 Jun 2024	3/4/5
VANGUARD CAPITAL MANAGEMENT LLC	13F	Company	— class O/S missing	105,429	$459,670	—	31 Mar 2026	13F
Anthony DiGiandomenico	3/4/5	Director	— mixed-class rows	547,502 mixed-class rows	$332,131	—	31 Mar 2026	3/4/5
Judith S. Schrecker	3/4/5	Director	— class O/S missing	431,957	$308,297	—	01 Jul 2025	3/4/5
SIMON QUICK ADVISORS, LLC	13F	Company	— class O/S missing	60,314	$262,969	—	31 Mar 2026	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	— class O/S missing	57,683	$251,544	—	31 Mar 2026	13F
Cambridge Investment Research Advisors, Inc.	13F	Company	— class O/S missing	44,300	$193,000	—	31 Mar 2026	13F
Catharine de Lacy	3/4/5	Director	— class O/S missing	218,957	$149,314	—	01 Jul 2025	3/4/5
Gary J. DiElsi	3/4/5	Director	— class O/S missing	115,993	$129,912	—	02 Oct 2023	3/4/5
Beacon Pointe Advisors, LLC	13F	Company	— class O/S missing	27,173	$118,475	—	31 Mar 2026	13F
Brent Hinds	3/4/5	Chief Financial Officer	— mixed-class rows	217,833 mixed-class rows	$108,897	—	26 Feb 2026	3/4/5
VANGUARD FIDUCIARY TRUST CO	13F	Company	— class O/S missing	23,460	$102,286	—	31 Mar 2026	13F
BlackRock, Inc.	13F	Company	— class O/S missing	19,503	$85,033	—	31 Mar 2026	13F
G. Todd Silva	3/4/5	Director	— mixed-class rows	132,933 mixed-class rows	$80,264	+$10,569	23 Apr 2026	3/4/5
David M. Maley	3/4/5	Director	— class O/S missing	105,443	$76,735	—	01 Jul 2025	3/4/5
HighTower Advisors, LLC	13F	Company	— class O/S missing	12,680	$55,285	—	31 Mar 2026	13F
Creative Planning	13F	Company	— class O/S missing	12,355	$53,868	—	31 Mar 2026	13F
DDD Partners, LLC	13F	Company	— class O/S missing	12,000	$52,320	—	31 Mar 2026	13F
Susanne Meline	3/4/5	Director	— mixed-class rows	133,870 mixed-class rows	$48,014	—	03 Jan 2023	3/4/5
Rockefeller Capital Management L.P.	13F	Company	— class O/S missing	8,120	$35,403	—	31 Mar 2026	13F
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO	13F	Company	— class O/S missing	7,172	$31,270	—	31 Mar 2026	13F
Bruce A. Pate	3/4/5	Director	— mixed-class rows	84,803 mixed-class rows	$16,019	—	01 Jul 2022	3/4/5
Lou Basenese	3/4/5	Director	— mixed-class rows	93,290 mixed-class rows	$12,200	—	31 Mar 2026	3/4/5
WELLS FARGO & COMPANY/MN	13F	Company	— class O/S missing	2,125	$9,265	—	31 Mar 2026	13F
Gleason Group, Inc.	13F	Company	— class O/S missing	1,802	$7,857	—	31 Mar 2026	13F
Centerpoint Advisors, LLC	13F	Company	— class O/S missing	1,560	$7,000	—	31 Mar 2026	13F
Vanguard Global Advisers, LLC	13F	Company	— class O/S missing	1,350	$5,886	—	31 Mar 2026	13F
Tower Research Capital LLC (TRC)	13F	Company	— class O/S missing	1,045	$4,556	—	31 Mar 2026	13F
DEUTSCHE BANK AG\	13F	Company	— class O/S missing	400	$1,744	—	31 Mar 2026	13F
SBI Securities Co., Ltd.	13F	Company	— class O/S missing	11	$48	—	31 Mar 2026	13F
GROUP ONE TRADING LLC	13F	Company	— class O/S missing	9	$39	—	31 Mar 2026	13F

Recent Insider Transactions by Companies or Individuals for ClearSign Technologies Corp

Showing up to 300 most recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	Value $	* Price $	Shares	Shares Owned	Date	Ownership
G. Todd Silva	CLIR	Common Stock	Purchase	50%	$10,569	$5.28	2,000	6,000	23 Apr 2026	Direct
Lou Basenese	CLIR	Non-Statutory Stock Options	Award				3,024	3,024	31 Mar 2026	Direct
Gil Todd Silva	CLIR	Non-Statutory Stock Options	Award				3,024	3,024	31 Mar 2026	Direct
Gil Todd Silva	CLIR	Restricted Stock Units	Award	2.86%			3,440	123,909	31 Mar 2026	Direct
Anthony DiGiandomenico	CLIR	Non-Statutory Stock Options	Award				3,024	3,024	31 Mar 2026	Direct
G. Todd Silva	CLIR	Common Stock	Purchase	100%			2,000	4,000	17 Mar 2026	Direct
G. Todd Silva	CLIR	Common Stock	Purchase				2,000	2,000	16 Mar 2026	Direct
Colin J. Deller	CLIR	Common Stock	Tax liability	-10%			-3,501	31,466	26 Feb 2026	Direct
Colin J. Deller	CLIR	Common Stock	Award	25%			7,001	34,967	26 Feb 2026	Direct
Brent Hinds	CLIR	Common Stock	Tax liability	-10.8%			-20,761	170,824	26 Feb 2026	Direct
Brent Hinds	CLIR	Common Stock	Award	42%			56,645	191,585	26 Feb 2026	Direct
Brent Hinds	CLIR	Restricted Stock Unit	Award				47,009	47,009	26 Feb 2026	Direct
Brent Hinds	CLIR	Common Stock	Tax liability	-2.01%			-2,765	134,940	22 Feb 2026	Direct
Brent Hinds	CLIR	Common Stock	Options Exercise	5.8%			7,547	137,705	22 Feb 2026	Direct
Brent Hinds	CLIR	Restricted Stock Unit	Options Exercise	-50%			-7,547	7,547	22 Feb 2026	Direct
Brent Hinds	CLIR	Common Stock	Tax liability	-2.56%			-3,413	130,158	20 Feb 2026	Direct
Brent Hinds	CLIR	Common Stock	Options Exercise	7.5%			9,315	133,571	20 Feb 2026	Direct
Brent Hinds	CLIR	Restricted Stock Unit	Options Exercise	-33.3%			-9,315	18,631	20 Feb 2026	Direct
Brent Hinds	CLIR	Common Stock	Tax liability	-2.9%			-3,711	124,256	02 Feb 2026	Direct
Brent Hinds	CLIR	Common Stock	Options Exercise	8.59%			10,127	127,967	02 Feb 2026	Direct
Brent Hinds	CLIR	Restricted Stock Unit	Options Exercise	-50%			-10,127	10,127	02 Feb 2026	Direct
Lou Basenese	CLIR	Restricted Stock Units	Award	53.9%			24,621	70,266	01 Oct 2025	Direct
Gill Todd Silva	CLIR	Restricted Stock Units	Award	28.6%			26,830	120,469	01 Oct 2025	Direct
David M. Maley	CLIR	Restricted Stock Units	Award	9.85%			9,452	105,443	01 Jul 2025	Direct
Gill Todd Silva	CLIR	Restricted Stock Units	Award	53.5%			32,638	93,639	01 Jul 2025	Direct
Catharine de Lacy	CLIR	Restricted Stock Units	Award	17.2%			32,175	218,957	01 Jul 2025	Direct
Judith S. Schrecker	CLIR	Restricted Stock Units	Award	12%			46,296	431,957	01 Jul 2025	Direct
Lou Basenese	CLIR	Restricted Stock Units	Award	317.9%			34,722	45,645	01 Jul 2025	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.