ClearSign (CLIR) director awarded new stock options and RSUs

Rhea-AI Filing Summary

Silva Gil Todd reported acquisition or exercise transactions in this Form 4 filing.

ClearSign Technologies director Gil Todd Silva received new equity awards as compensation for service as a non-employee director for the quarter ended June 30, 2026. The awards include 4,595 non-statutory stock options to buy common shares at $3.67 per share, expiring on June 29, 2036, which were fully vested and exercisable on the grant date.

Silva was also granted 4,087 restricted stock units, each representing one share of common stock or its cash equivalent. These RSUs will vest upon the first to occur of a change in control, disability, death, or separation from service. Following these grants, Silva holds 4,595 options and 19,576 RSUs directly.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Silva Gil Todd

Role null

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	4,087	$0.00	--
Grant/Award	Non-Statutory Stock Options	4,595	$0.00	--

Holdings After Transaction: Restricted Stock Units — 19,576 shares (Direct, null); Non-Statutory Stock Options — 4,595 shares (Direct, null)

Footnotes (1)

1. As compensation for services as a non-employee director during the quarter ended June 30, 2026, the reporting person was granted restricted stock units ("RSUs") under the ClearSign Technologies Corporation Amended and Restated 2021 Equity Incentive Plan (the "Plan") pursuant to the issuer's non-employee director compensation policy, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof. The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service. 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 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.

Key Figures

Options granted: 4,595 options Option exercise price: $3.67 per share Option expiration: June 29, 2036 +3 more

6 metrics

Options granted 4,595 options Non-statutory stock options granted for quarter ended June 30, 2026

Option exercise price $3.67 per share Exercise price for newly granted non-statutory stock options

Option expiration June 29, 2036 Expiration date of non-statutory stock options

RSUs granted 4,087 RSUs Restricted stock units granted as non-employee director compensation

RSU holdings after grant 19,576 RSUs Total restricted stock units reported following transaction

Option holdings after grant 4,595 options Total non-statutory stock options reported following transaction

Key Terms

Non-Statutory Stock Options, Restricted Stock Units, Amended and Restated 2021 Equity Incentive Plan, Change in Control, +1 more

5 terms

Non-Statutory Stock Options financial

"the reporting person was granted non-statutory stock options to purchase 4,595 shares of common stock under the Plan"

Non-statutory stock options are a type of reward that companies give to employees, allowing them to buy company shares at a set price within a certain period. Unlike formal or government-approved plans, these options are more flexible but may have different tax implications. For investors, they can influence a company's stock price and financial health, making them an important factor to consider.

Restricted Stock Units financial

"the reporting person was granted restricted stock units ("RSUs") under the ClearSign Technologies Corporation Amended and Restated 2021 Equity Incentive Plan"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Amended and Restated 2021 Equity Incentive Plan financial

"under the ClearSign Technologies Corporation Amended and Restated 2021 Equity Incentive Plan (the "Plan")"

Change in Control financial

"The RSUs will vest upon the first to occur of: (1) a Change in Control"

A "change in control" occurs when the ownership or management of a company shifts significantly, such as through a merger, acquisition, or sale of a large part of its assets. This change can impact how the company is run and may influence its future direction. For investors, it matters because it can affect the company's stability, strategy, and value, often signaling potential changes in investment risk or opportunity.

Disability financial

"The RSUs will vest upon the first to occur of ... (2) the reporting person's Disability"

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/02/2026 - 07:01 PM Accepted by SEC EDGAR 07/02/2026 - 07:01 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Silva Gil Todd

(Last) (First) (Middle)

8023 E. 63RD PLACE, SUITE 101

(Street)

TULSA OKLAHOMA 74133

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ClearSign Technologies Corp [ CLIR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/30/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(1)	06/30/2026		A		4,087		(2)	(2)	Common Stock	4,087	$0.00	19,576	D
Non-Statutory Stock Options	$3.67	06/30/2026		A		4,595		(3)	06/29/2036	Common Stock	4,595	$0.00	4,595	D

Explanation of Responses:

1. As compensation for services as a non-employee director during the quarter ended June 30, 2026, the reporting person was granted restricted stock units ("RSUs") under the ClearSign Technologies Corporation Amended and Restated 2021 Equity Incentive Plan (the "Plan") pursuant to the issuer's non-employee director compensation policy, and each RSU represents a right to receive one share of common stock or the cash equivalent thereof.

2. The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting person's death; or (4) the reporting person's separation from service.

3. 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 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.

	/s/ Gill Todd Silva	07/02/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What equity awards did ClearSign (CLIR) director Gil Todd Silva receive?

Gil Todd Silva received stock options and restricted stock units as director compensation. The grants consist of 4,595 non-statutory stock options and 4,087 restricted stock units, all tied to ClearSign common stock, for service during the quarter ended June 30, 2026.

What are the key terms of Gil Todd Silva’s new stock options at ClearSign (CLIR)?

Silva’s new options cover 4,595 shares of ClearSign common stock at an exercise price of $3.67 per share. These non-statutory options vested immediately on the grant date and are exercisable until their expiration on June 29, 2036, under the company’s 2021 Equity Incentive Plan.

How do Gil Todd Silva’s RSUs from ClearSign (CLIR) vest?

Silva’s 4,087 restricted stock units vest upon specific events rather than on a fixed schedule. Vesting occurs on the first to happen of a change in control, disability, death, or separation from service, as defined in the applicable RSU award agreement.

Are Gil Todd Silva’s equity awards from ClearSign (CLIR) open-market purchases?

No, the awards are grants, not market purchases. The Form 4 shows acquisitions coded as grants or awards (transaction code A), given as compensation for Silva’s service as a non-employee director under ClearSign’s Amended and Restated 2021 Equity Incentive Plan.

What are Gil Todd Silva’s derivative holdings after these ClearSign (CLIR) grants?

After the grants, Silva holds 4,595 non-statutory stock options and 19,576 restricted stock units, all reported as direct holdings. The options relate to ClearSign common stock and carry a $3.67 exercise price, while each RSU represents one share or a cash equivalent.