Lou Basenese - 30 Jun 2026 Form 4 Insider Report for ClearSign Technologies Corp (CLIR)

Reporting relationship: Director
Issuer ticker: CLIR
Reported as of: 30 Jun 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 02 Jul 2026, 19:01:54 UTC
Prior SEC filing: 02 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Louis J. Basenese

Key filing fact

Lou Basenese filed Form 4 for ClearSign Technologies Corp (CLIR) on 02 Jul 2026.

Key facts

This page summarizes Lou Basenese's Form 4 filing for ClearSign Technologies Corp (CLIR).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 02 Jul 2026, 19:01.

Change

Previous filing in this sequence was filed on 02 Apr 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001809482 Primary reporting owner

Basenese Lou

Relationship: Director
Address: 8023 E. 63RD PLACE, SUITE 101, TULSA
Signature: /s/ Louis J. Basenese
Signature date: 02 Jul 2026

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

CLIR transaction Derivative

Non-Statutory Stock Options

Award

Transaction value
Shares: +4,595
Change %
Price: $0.000000^*
Shares after: 4,595
Date: 30 Jun 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 4,595
Exercise price: $3.67
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

As compensation for services as a non-employee director during the quarter ended June 30, 2026, the reporting person was granted non-statutory stock options to purchase 4,595 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.