ClearSign Technologies (CLIR) director adds 2,000 shares in open-market buys

Rhea-AI Filing Summary

ClearSign Technologies Corp director Gil Todd Silva bought additional shares of the company in the open market. On April 23, 2026, the reporting person made two separate open-market purchases of 1,000 shares each of ClearSign common stock, at prices of $5.319 and $5.25 per share, increasing their direct investment in the company.

Insider Trade Summary

Net Buyer: 2,000 shares ($10,569)

Net Buy 2 txns

Insider Silva Gil Todd

Role null

Bought 2,000 shs ($11K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	1,000	$5.319	$5K
Purchase	Common Stock	1,000	$5.25	$5K

Holdings After Transaction: Common Stock — 5,000 shares (Direct, null)

Footnotes (1)

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Key Figures

Total shares bought: 2,000 shares First purchase size: 1,000 shares First purchase price: $5.319 per share +2 more

5 metrics

Total shares bought 2,000 shares Two open-market purchases on April 23, 2026

First purchase size 1,000 shares Non-derivative common stock, open-market transaction

First purchase price $5.319 per share Open-market buy on April 23, 2026

Second purchase size 1,000 shares Non-derivative common stock, open-market transaction

Second purchase price $5.25 per share Open-market buy on April 23, 2026

Key Terms

Common Stock, open-market purchases, Form 4

3 terms

Common Stock financial

"Represents the reporting person's two separate, open-market purchases of 1,000 shares of common stock"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

open-market purchases financial

"two separate, open-market purchases of 1,000 shares of common stock"

Open-market purchases are when a company or institution buys its own shares or other securities using the public stock market rather than through a private deal. For investors this matters because such buying reduces the number of shares available, often boosting metrics like earnings per share and signaling management thinks the stock is undervalued, while also using cash that might otherwise fund growth or dividends — like a business buying back chips at the table to increase each remaining player's stake.

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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)
04/23/2026

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	04/23/2026		P(1)		1,000	A	$5.319	5,000	D
Common Stock	04/23/2026		P(1)		1,000	A	$5.25	6,000	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 two separate, open-market purchases of 1,000 shares of common stock of the issuer on April 23, 2026, at a price of $5.319 and $5.25 per share, respectively.

	/s/ G. Todd Silva	04/27/2026
	** 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 transactions did CLIR director Gil Todd Silva report?

Gil Todd Silva reported two open-market purchases of ClearSign Technologies common stock. Each transaction involved 1,000 shares, both executed on April 23, 2026, as disclosed in the Form 4 filing, reflecting additional personal investment in the company’s stock.

How many ClearSign Technologies (CLIR) shares were purchased in this Form 4?

The Form 4 reports total purchases of 2,000 ClearSign Technologies common shares. These came from two separate open-market transactions of 1,000 shares each, both executed on April 23, 2026, according to the insider transaction summary.

At what prices did Gil Todd Silva buy CLIR stock on April 23, 2026?

The reported purchases were made at prices of $5.319 and $5.25 per share. Each price applied to a 1,000-share open-market transaction in ClearSign Technologies common stock, as detailed in the Form 4 footnote and transaction entries.

What type of transactions were reported in this ClearSign Technologies Form 4?

Both transactions were classified as non-derivative, open-market purchases of common stock. The filing labels them with transaction code “P,” indicating standard purchases rather than option exercises, gifts, or tax-related dispositions by the reporting person.

Does the Form 4 for CLIR indicate any insider stock sales?

No, the Form 4 only shows insider purchases. The transaction summary lists two buy transactions totaling 2,000 shares and no sales, exercises, gifts, or tax-withholding dispositions for ClearSign Technologies common stock in this filing.