Comparable stake leader
John M. Pasquesi
SEC ownership of ClearSign Technologies Corp
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001434524.
Disclosed value leader
Robert T. Hoffman Sr.
Comparable rows
3/34
Latest evidence
23 Apr 2026
- Public ticker
- CLIR on Nasdaq
- Parsed ownership sources
-
3/4/5, 13D/G, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
John M. Pasquesi
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
3 of 34
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
John M. Pasquesi
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
23 Apr 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001434524
- Issuer location
- Tulsa, OK
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of ClearSign Technologies Corp (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
John M. Pasquesi
Disclosed value leader
Robert T. Hoffman Sr.
Comparable rows
3/34
Latest evidence
23 Apr 2026
3/4/5
13D/G
13F
Lead comparable stake: 20%
31 rows are not safely comparable across share classes.
13D/G row: John M. Pasquesi
Showing 1-8 of 34 holder rows.
Quick read
John M. Pasquesi leads the comparable SEC ownership view at 20%.
3 of 34 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens John M. Pasquesi's linked filing trail.
Comparable ownership
Top 3
John M. Pasquesi
20%
clirSPV LLC
4.3%
Colin J. Deller
0.06%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 34 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| John M. Pasquesi |
3/4/5
13D/G
10%+ Owner
|
20%
from 13D/G
|
$6,742,758
8,434,774 shares
|
— | 14 Feb 2025 |
| clirSPV LLC |
13D/G
HOFFMAN Robert Thurston Sr
|
4.3%
|
$1,371,906
2,249,027 shares
|
$0 | 14 Feb 2025 |
| Colin J. Deller |
3/4/5
Chief Executive Officer, Director
|
0.06%
|
$155,492
31,466 shares
|
— | 26 Feb 2026 |
| Robert T. Hoffman Sr. |
3/4/5
10%+ Owner
|
—
mixed-class rows
|
$17,451,117
24,795,027 shares
mixed-class rows
|
— | 24 Jun 2024 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
—
class O/S missing
|
$459,670
105,429 shares
|
— | 31 Mar 2026 |
| Anthony DiGiandomenico |
3/4/5
Director
|
—
mixed-class rows
|
$332,131
547,502 shares
mixed-class rows
|
— | 31 Mar 2026 |
| Judith S. Schrecker |
3/4/5
Director
|
—
class O/S missing
|
$308,297
431,957 shares
|
— | 01 Jul 2025 |
| SIMON QUICK ADVISORS, LLC |
13F
Company
|
—
class O/S missing
|
$262,969
60,314 shares
|
— | 31 Mar 2026 |
How to read this table
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.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to buying over the last 12 months. Net value: +$10,569.
Buys
$10,569
Insiders: 1
Sells
$0
Insiders: 0
Net
+$10,569
Shares: +2,000
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 2,000
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 2,000 | 0 | $10,569 | $0 | +$10,569 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-13 of 13 reporting-owner rows connected to ClearSign Technologies Corp. Open a relationship link for the CIK-to-CIK filing trail.
Rows
13
Largest Forms 3/4/5 holder
Robert T. Hoffman Sr.
Net 12M change
+$10,569
Latest report
23 Apr 2026
| 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 |
Recent insider transactions for ClearSign Technologies Corp
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported 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 |
* marks a reported price that did not pass the local price check.