SEC Form 4 · Updated Daily
CLIR
— CLEARSIGN TECHNOLOGIES CORPORATION OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| Princeton Opportunity Management LLC | 10%+ Owner | 9,539,857 | 2024-06-24 | P |
| GPclirSPV LLC | 10%+ Owner | 9,539,857 | 2024-06-24 | P |
| clirSPV LLC | 10%+ Owner | 9,539,857 | 2024-06-24 | P |
| HOFFMAN Robert Thurston Sr | 10%+ Owner | 9,539,857 | 2024-06-24 | P |
| SIMMONS JAMES M | Director | 1,666,627 | 2019-01-08 | — |
| PASQUESI JOHN M | Director | 1,343,477 | 2026-07-22 | P |
| GOODSON DAVID B | Director | 1,040,000 | 2012-04-23 | — |
| BD & DBG LIVING TRUST | Reporting Owner | 622,158 | 2015-12-15 | S |
| DIGIANDOMENICO ANTHONY | Director | 544,478 | 2025-05-22 | — |
| OSLER GEOFFREY D | Officer | 425,249 | 2015-02-05 | S |
| BELL LON E | Director | 381,499 | 2018-12-31 | A |
| MARLETT CHRISTOPHER A | Reporting Owner | 380,460 | 2012-05-09 | J |
| Hinds Brent | Officer | 191,585 | 2026-02-26 | A |
| HARMON JAMES N | Officer | 186,841 | 2017-02-10 | A |
| RUTKOWSKI RICHARD F | Director · Officer | 171,250 | 2014-09-24 | P |
| Pate Bruce Alan | Director | 150,000 | 2022-06-14 | P |
| PIRNAT STEPHEN E | Director | 113,947 | 2018-02-27 | P |
| ISAACSON SCOTT P | Director | 107,935 | 2018-12-31 | A |
| Ott Jeffrey L | Officer | 72,497 | 2018-09-28 | A |
| Meline Susanne | Director | 54,249 | 2020-08-24 | P |
| Kendrick Donald W | Officer | 44,233 | 2019-03-19 | P |
| Deller Colin James | Officer | 34,967 | 2026-02-26 | A |
| Basenese Lou | Director | 20,000 | 2025-05-22 | — |
| COLANNINO JOSEPH | Officer | 16,781 | 2017-02-10 | A |
| Fike Brian Grant | Officer | 15,837 | 2021-01-10 | A |
| Silva Gil Todd | Director | 6,000 | 2026-04-23 | P |
| LEE ANDREW U | Officer | 5,800 | 2017-08-17 | P |
| Ruiz Roberto | Officer | 5,560 | 2017-08-18 | P |
| Sock Stephen Michael | Officer | 3,380 | 2018-08-23 | — |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-30 | DIGIANDOMENICO ANTHONY | Grant / award (derivative) | 3,766 | $0.00 | 3,766 |
| 2026-09-30 | Saddler Larry Michael | Grant / award (derivative) | 2,275 | $0.00 | 2,275 |
| 2026-09-30 | Silva Gil Todd | Grant / award (derivative) | 3,766 | $0.00 | 3,766 |
| 2026-09-30 | Silva Gil Todd | Grant / award (derivative) | 4,225 | $0.00 | 23,801 |
| 2026-09-30 | Basenese Lou | Grant / award (derivative) | 3,766 | $0.00 | 3,766 |
| 2026-07-22 | PASQUESI JOHN M | Open-market buy | 500,000 | $3.54 | 1,343,477 |
| 2026-06-30 | DIGIANDOMENICO ANTHONY | Grant / award (derivative) | 4,595 | $0.00 | 4,595 |
| 2026-06-30 | Silva Gil Todd | Grant / award (derivative) | 4,595 | $0.00 | 4,595 |
| 2026-06-30 | Silva Gil Todd | Grant / award (derivative) | 4,087 | $0.00 | 19,576 |
| 2026-06-30 | Basenese Lou | Grant / award (derivative) | 4,595 | $0.00 | 4,595 |
| 2026-04-23 | Silva Gil Todd | Open-market buy | 1,000 | $5.25 | 6,000 |
| 2026-04-23 | Silva Gil Todd | Open-market buy | 1,000 | $5.32 | 5,000 |
| 2026-03-31 | DIGIANDOMENICO ANTHONY | Grant / award (derivative) | 3,024 | $0.00 | 3,024 |
| 2026-03-31 | Silva Gil Todd | Grant / award (derivative) | 3,024 | $0.00 | 3,024 |
| 2026-03-31 | Silva Gil Todd | Grant / award (derivative) | 3,440 | $0.00 | 123,909 |
| 2026-03-31 | Basenese Lou | Grant / award (derivative) | 3,024 | $0.00 | 3,024 |
| 2026-03-17 | Silva Gil Todd | Open-market buy | 2,000 | $4.20 | 4,000 |
| 2026-03-16 | Silva Gil Todd | Open-market buy | 2,000 | $4.36 | 2,000 |
| 2026-02-26 | Hinds Brent | Grant / award (derivative) | 47,009 | $0.00 | 47,009 |
| 2026-02-26 | Hinds Brent | Tax withholding | 20,761 | $0.56 | 170,824 |
| 2026-02-26 | Hinds Brent | Grant / award | 56,645 | $0.00 | 191,585 |
| 2026-02-26 | Deller Colin James | Tax withholding | 105,022 | $0.56 | 276,874 |
| 2026-02-26 | Deller Colin James | Grant / award | 210,043 | $0.00 | 381,896 |
| 2026-02-26 | Deller Colin James | Tax withholding | 3,501 | $5.62 | 31,466 |
| 2026-02-26 | Deller Colin James | Grant / award | 7,001 | $5.62 | 34,967 |
| 2026-02-22 | Hinds Brent | Option exercise (derivative) | 7,547 | $0.00 | 7,547 |
| 2026-02-22 | Hinds Brent | Tax withholding | 2,765 | $0.59 | 134,940 |
| 2026-02-22 | Hinds Brent | Option exercise | 7,547 | — | 137,705 |
| 2026-02-20 | Hinds Brent | Option exercise (derivative) | 9,315 | $0.00 | 18,631 |
| 2026-02-20 | Hinds Brent | Tax withholding | 3,413 | $0.59 | 130,158 |
| 2026-02-20 | Hinds Brent | Option exercise | 9,315 | — | 133,571 |
| 2026-02-02 | Hinds Brent | Option exercise (derivative) | 10,127 | $0.00 | 10,127 |
| 2026-02-02 | Hinds Brent | Tax withholding | 3,711 | $0.60 | 124,256 |
| 2026-02-02 | Hinds Brent | Option exercise | 10,127 | — | 127,967 |
| 2025-10-01 | Silva Gil Todd | Grant / award (derivative) | 26,830 | $0.00 | 120,469 |
| 2025-10-01 | Basenese Lou | Grant / award (derivative) | 24,621 | $0.00 | 70,266 |
| 2025-07-01 | Basenese Lou | Grant / award (derivative) | 34,722 | $0.00 | 45,645 |
| 2025-07-01 | Schrecker Judith S | Grant / award (derivative) | 46,296 | $0.00 | 431,957 |
| 2025-07-01 | de Lacy Catharine | Grant / award (derivative) | 32,175 | $0.00 | 218,957 |
| 2025-07-01 | Silva Gil Todd | Grant / award (derivative) | 32,638 | $0.00 | 93,639 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.