ClearSign Technologies (CLIR) director Lou Basenese receives 4,595 fully vested options

Rhea-AI Filing Summary

ClearSign Technologies Corp director Lou Basenese received a grant of stock options as part of his quarterly board compensation. On the grant date, he was awarded non-statutory options to purchase 4,595 shares of common stock at an exercise price of $3.67 per share.

The options were granted under ClearSign’s Amended and Restated 2021 Equity Incentive Plan pursuant to the company’s non-employee director compensation policy and became fully vested and exercisable immediately. Following this grant, Basenese holds 4,595 non-statutory stock options directly.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Basenese Lou

Role null

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

Holdings After Transaction: Non-Statutory Stock Options — 4,595 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Options granted: 4,595 options Exercise price: $3.67 per share Underlying shares: 4,595 shares +2 more

5 metrics

Options granted 4,595 options Non-statutory stock options granted as non-employee director compensation for quarter ended June 30, 2026

Exercise price $3.67 per share Exercise price for the 4,595 non-statutory stock options

Underlying shares 4,595 shares Common stock underlying the granted non-statutory options

Expiration date June 29, 2036 Scheduled expiration of the granted stock options

Options held after grant 4,595 options Total non-statutory stock options directly owned following this transaction

Key Terms

Non-Statutory Stock Options, Equity Incentive Plan, non-employee director compensation policy, vested and exercisable

4 terms

Non-Statutory Stock Options financial

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

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.

Equity Incentive Plan financial

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

An equity incentive plan is a program that gives employees, executives or directors the right to receive company stock or options to buy stock as part of their pay. Think of it as offering slices of future company profit to motivate people to boost long‑term performance; for investors it matters because it can align employee goals with shareholder value but also increases the number of shares outstanding, which can dilute existing ownership.

non-employee director compensation policy financial

"pursuant to the issuer's non-employee director compensation policy"

vested and exercisable financial

"These non-statutory stock options were immediately vested and exercisable on the grant date"

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/02/2026 - 07:02 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^*

Basenese Lou

(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
Non-Statutory Stock Options	$3.67	06/30/2026		A		4,595		(1)	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 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.

	/s/ Louis J. Basenese	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 did ClearSign Technologies (CLIR) director Lou Basenese report in this Form 4?

Lou Basenese reported receiving a grant of non-statutory stock options as director compensation. He was awarded 4,595 options to purchase ClearSign common shares at a $3.67 exercise price, which vested and became exercisable immediately under the company’s 2021 equity incentive plan.

How many ClearSign (CLIR) stock options were granted to Lou Basenese?

Lou Basenese was granted 4,595 non-statutory stock options. Each option gives him the right to purchase one share of ClearSign common stock, providing potential future ownership if he chooses to exercise the options at the fixed $3.67 per-share price.

What is the exercise price and term of Lou Basenese’s ClearSign (CLIR) options?

The options have a $3.67 per-share exercise price and expire on June 29, 2036. This long expiration period gives Basenese extended time to decide whether to exercise and convert the 4,595 options into ClearSign common shares.

Were Lou Basenese’s ClearSign (CLIR) options immediately vested?

Yes, the 4,595 non-statutory stock options vested and became exercisable immediately on the grant date. This means Basenese can choose to exercise the options at any time before their June 29, 2036 expiration, subject to the plan’s standard terms and conditions.

Why did ClearSign (CLIR) grant stock options to Lou Basenese?

The options were granted as compensation for Basenese’s services as a non-employee director for the quarter ended June 30, 2026. They were issued under ClearSign’s Amended and Restated 2021 Equity Incentive Plan in line with the non-employee director compensation policy.

How many ClearSign (CLIR) options does Lou Basenese hold after this grant?

After this transaction, Lou Basenese holds 4,595 non-statutory stock options directly. These options are all tied to ClearSign common shares, are fully vested, and remain outstanding until their scheduled expiration date on June 29, 2036, unless exercised earlier.