ClearSign Technologies (CLIR) director buys 4,000 shares in open market

Rhea-AI Filing Summary

ClearSign Technologies director Gil Todd Silva reported open-market purchases of the company’s common stock. He bought 2,000 shares on March 16, 2026 at $4.355 per share and another 2,000 shares on March 17, 2026 at $4.20 per share, bringing his direct holdings to 4,000 shares.

Insider Trade Summary

Net Buyer: 4,000 shares ($17,110)

Net Buy 2 txns

Insider Silva Gil Todd

Role Director

Bought 4,000 shs ($17K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	2,000	$4.20	$8K
Purchase	Common Stock	2,000	$4.355	$9K

Holdings After Transaction: Common Stock — 4,000 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

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)
03/16/2026

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
Common Stock	03/16/2026		P(1)		2,000	A	$4.355	2,000	D
Common Stock	03/17/2026		P(1)		2,000	A	$4.2	4,000	D

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

Explanation of Responses:

1. Represents the reporting person's open-market purchases of 2,000 shares of common stock of the issuer on March 16, 2026, and 2,000 shares of common stock of the issuer on March 17, 2026, at a price of $4.355 and $4.20 per share, respectively.

	/s/ G. Todd Silva	03/19/2026
	** 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 insider transaction did ClearSign Technologies (CLIR) disclose?

ClearSign Technologies disclosed that director Gil Todd Silva made two open-market purchases totaling 4,000 common shares. He bought 2,000 shares on March 16, 2026 at $4.355 and 2,000 shares on March 17, 2026 at $4.20, increasing his direct ownership.

How many ClearSign Technologies (CLIR) shares did Gil Todd Silva buy?

Gil Todd Silva bought a total of 4,000 ClearSign Technologies common shares. The Form 4 shows 2,000 shares purchased on March 16, 2026 and another 2,000 shares on March 17, 2026, both as open-market transactions reported as direct ownership.

At what prices did the ClearSign Technologies (CLIR) director purchase shares?

The director purchased shares at two different prices. He bought 2,000 ClearSign Technologies common shares at $4.355 per share on March 16, 2026, and another 2,000 common shares at $4.20 per share on March 17, 2026, all in open-market trades.

What is Gil Todd Silva’s ClearSign Technologies (CLIR) ownership after these trades?

After these trades, Gil Todd Silva directly owns 4,000 ClearSign Technologies common shares. The Form 4 shows 2,000 shares held after the March 16, 2026 purchase and 4,000 shares held following the March 17, 2026 open-market purchase, all classified as direct ownership.

Were the ClearSign Technologies (CLIR) insider trades open-market purchases?

Yes, both transactions are classified as open-market purchases. The Form 4 lists transaction code P for each trade, with the description “Purchase in open market or private transaction,” covering 2,000 shares on March 16, 2026 and 2,000 shares on March 17, 2026.