ClearSign Technologies Corporation
Last updated September 27, 2026
Organization details
- Legal name
- ClearSign Technologies Corporation
- Former names
- Clearsign Combustion Corp
- Ownership
- Public
- Status
- Active
- SIC code
- 3823 — Industrial Instruments For Measurement, Display, and Control
- Jurisdiction of incorporation
- Delaware
- Headquarters city
- Tulsa
- Headquarters state / province
- Oklahoma
- Headquarters country
- United States
- Fiscal year end
- December
- Ticker symbol
- CLIR
- Primary stock exchange
- Nasdaq
Identifiers
- SEC CIK
- 0001434524
Board of directors
- Since 2025
-
Colin James Deller · Director · Chief Executive OfficerSince 2023
-
David M. Maley · DirectorSince 2024
-
Gary J. DiElsi · DirectorSince 2023
-
Gil Todd Silva · DirectorSince 2024
-
Judith S. Schrecker · DirectorSince 2023
-
Lacy Catharine De · DirectorSince 2023
-
Larry Michael Saddler · DirectorSince 2026
-
Lou Basenese · DirectorSince 2025
-
Robert Thurston Hoffman Sr. · DirectorSince 2023
-
Susanne Meline · DirectorSince 2023
Chief executives
Colin James Deller
· Chief Executive Officer
Dates unknown
Director election results
Annual meeting of June 8, 2026. Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
-
80.9%
-
83.0%
-
83.4%
-
90.2%
Board connections
3 of this board's directors also sit on 5 other boards.
- via Anthony Digiandomenico and Lou Basenese
- via Anthony Digiandomenico and Susanne Meline
- via Susanne Meline
- via Anthony Digiandomenico
- via Anthony Digiandomenico
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
- Bought, last 12 months
- $1,797,690
- 5 purchases by 2 insiders
- Sold, last 12 months
- $0
- 0 sales by 0 insiders
| Date | Insider | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Jul 22, 2026 | John M. Pasquesi 10% owner | Open-market purchase | +500,000 | $3.54 | $1,770,000 |
| Apr 23, 2026 | Gil Todd Silva Director | Open-market purchase | +1,000 | $5.32 | $5,320 |
| Apr 23, 2026 | Gil Todd Silva Director | Open-market purchase | +1,000 | $5.25 | $5,250 |
| Mar 17, 2026 | Gil Todd Silva Director | Open-market purchase | +2,000 | $4.20 | $8,400 |
| Mar 16, 2026 | Gil Todd Silva Director | Open-market purchase | +2,000 | $4.36 | $8,720 |
| Feb 26, 2026 | Colin James Deller Officer (Chief Executive Officer) | Grant or award | +210,043 | — | — |
| Feb 26, 2026 | Hinds Brent Officer (Chief Financial Officer) | Grant or award | +56,645 | — | — |
| Feb 26, 2026 | Colin James Deller Officer (Chief Executive Officer) | Shares withheld for tax | −105,022 | $0.56 | $58,812 |
| Feb 26, 2026 | Hinds Brent Officer (Chief Financial Officer) | Shares withheld for tax | −20,761 | $0.56 | $11,626 |
| Feb 22, 2026 | Hinds Brent Officer (Chief Financial Officer) | Option exercise | +7,547 | — | — |
| Feb 22, 2026 | Hinds Brent Officer (Chief Financial Officer) | Shares withheld for tax | −2,765 | $0.59 | $1,631 |
| Feb 20, 2026 | Hinds Brent Officer (Chief Financial Officer) | Option exercise | +9,315 | — | — |
| Feb 20, 2026 | Hinds Brent Officer (Chief Financial Officer) | Shares withheld for tax | −3,413 | $0.59 | $2,014 |
| Feb 2, 2026 | Hinds Brent Officer (Chief Financial Officer) | Option exercise | +10,127 | — | — |
| Feb 2, 2026 | Hinds Brent Officer (Chief Financial Officer) | Shares withheld for tax | −3,711 | $0.60 | $2,227 |
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