Changes in Beneficial Ownership · 4
ClearSign Technologies Corporation
CLIRNASDAQEQUITYCurrent
Changes in Beneficial Ownership
Structured filing — 4
tm2626853-1_4seq1.xml
Filing details
- Report period
- 2026-09-30
- Issuer
- ClearSign Technologies Corp
- Issuer CIK
- 0001434524
- Trading symbol
- CLIR
Reporting owner 1
- Name
- DIGIANDOMENICO ANTHONY
- Reporting owner CIK
- 0001083544
- Relationship
- Director
- Address
- 8023 E. 63RD PLACE, SUITE 101, TULSA, OK, 74133
Derivative transactions
| Security | Conversion / exercise price (USD) | Transaction date | Code | Amount | A / D | Price (USD) | Exercisable | Expires | Underlying security | Underlying shares | Owned after | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Non-Statutory Stock Options | 3.55 | 2026-09-30 | A · Form 4 | 3,766 | A | 0.00 | [F1] | 2036-09-29 | Common Stock | 3,766 | 3,766 | D |
Table key
- A · Form 4
- Acquisition by grant, award or otherwise under Rule 16b-3(d)
- A
- Acquired
- D
- Direct
Footnotes
- F1
- As compensation for services as a non-employee director during the quarter ended September 30, 2026, the reporting person was granted non-statutory stock options to purchase 3,766 shares of common stock under the ClearSign Technologies Corporation Amended and Restated 2021 Equity Incentive Plan pursuant to the issuer's non-employee director compensation policy. These non-statutory stock options were immediately vested and exercisable on the grant date.↩ 1
Signature 1
- Signed
- /s/ Anthony DiGiandomenico
- Date
- 2026-10-02
Company context
ClearSign Technologies Corporation designs and develops products and technologies for the purpose of decarbonization and improving key performance characteristics of industrial and commercial systems, including operational performance, energy efficiency, emission reduction, safety, the use of hydrogen as a fuel and overall cost-effectiveness. Our patented technologies, embedded in established OEM products as ClearSign Core ™ and ClearSign Eye ™ and other sensing configurations, enhance the performance of combustion systems and fuel safety systems in a broad range of markets, including the energy (upstream oil production and down-stream refining), commercial/industrial boiler, chemical, petrochemical, transport and power industries. For more information, please visit www.clearsign.com.
Current securities
Recent company filings
- Regulation FD DisclosureSep 14, 2026
- Results of Operations and Financial Condition · Regulation FD DisclosureAug 20, 2026
- 10-Q filingAug 14, 2026
- Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements · Regulation FD DisclosureAug 11, 2026
- D filingJul 31, 2026