ClearSign Technologies Corp (CLIR) Insider Ownership

Historic Insider Ownership Trends

ClearSign Technologies's top three insider shareholders as of April 28, 2026 are Robert Thurston Sr Hoffman (TenPercentOwner, 9.54Mn shares), Robert Thurston Sr Hoffman (Director, 6.19Mn shares), Colin James Deller (Chief Executive Officer, 276.87K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Robert Thurston Sr Hoffman - 0 9,539,857 26 Jun, 2024
Robert Thurston Sr Hoffman - 0 6,189,857 02 Feb, 2024
Colin James Deller Chief Executive Officer 276,874 0 02 Mar, 2026
Brent Hinds Chief Financial Officer 170,824 0 02 Mar, 2026
Bruce Alan Pate - 0 150,000 16 Jun, 2022
Gil Todd Silva - 4,000 0 19 Mar, 2026

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
31 Mar, 2026 Lou Basenese Non-Statutory Stock Options A 3,024 $0.00 3,024 D A
31 Mar, 2026 Gil Todd Silva Restricted Stock Units A 3,440 $0.00 123,909 D A
31 Mar, 2026 Gil Todd Silva Non-Statutory Stock Options A 3,024 $0.00 3,024 D A
16 Mar, 2026 Gil Todd Silva Common Stock A 2,000 $4.36 2,000 D P
17 Mar, 2026 Gil Todd Silva Common Stock A 2,000 $4.20 4,000 D P
26 Feb, 2026 Brent Hinds Common Stock A 56,645 $0.00 191,585 D A
26 Feb, 2026 Colin James Deller Common Stock A 210,043 $0.00 381,896 D A
26 Feb, 2026 Colin James Deller Common Stock D 105,022 $0.56 276,874 D F
26 Feb, 2026 Brent Hinds Common Stock D 20,761 $0.56 170,824 D F
26 Feb, 2026 Brent Hinds Restricted Stock Unit A 47,009 $0.00 47,009 D A
20 Feb, 2026 Brent Hinds Common Stock A 9,315 - 133,571 D M
20 Feb, 2026 Brent Hinds Common Stock D 3,413 $0.59 130,158 D F
22 Feb, 2026 Brent Hinds Common Stock A 7,547 - 137,705 D M
22 Feb, 2026 Brent Hinds Common Stock D 2,765 $0.59 134,940 D F
20 Feb, 2026 Brent Hinds Restricted Stock Unit D 9,315 $0.00 18,631 D M
22 Feb, 2026 Brent Hinds Restricted Stock Unit D 7,547 $0.00 7,547 D M
02 Feb, 2026 Brent Hinds Common Stock A 10,127 - 127,967 D M
02 Feb, 2026 Brent Hinds Common Stock D 3,711 $0.60 124,256 D F
02 Feb, 2026 Brent Hinds Restricted Stock Unit D 10,127 $0.00 10,127 D M
01 Oct, 2025 Gil Todd Silva Restricted Stock Units A 26,830 $0.00 120,469 D A