Genelux CSO sells shares to cover vesting taxes

GENELUX Corp Chief Scientific Officer Yong Yu reported selling 653 shares of common stock on August 4, 2026, at a weighted average price of $2.9434 per share, in a sale described as open-market or private.

Accepted by SEC EDGAR 08/04/2026 - 08:20 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

GENELUX Corp Chief Scientific Officer Yong Yu reported selling 653 shares of common stock on August 4, 2026, at a weighted average price of $2.9434 per share, in a sale described as open-market or private. A footnote states the shares were sold to cover estimated taxes from the vesting of restricted stock units, and Yu held 268,371 shares afterward.

Insider Trade Summary

Net Seller: 653 shares

Net Sell 1 txn

Insider Yu Yong

Role Chief Scientific Officer

Sold 653 shs ($2K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	653	$2.9434	$2K

Holdings After Transaction: Common Stock — 268,371 shares (Direct)

Footnotes (2)

1. F1. Represents shares sold by the Reporting Person to cover estimated taxes to be paid by the Reporting Person in connection with the vesting of restricted stock units.
2. F2. The weighted average sale price for the transaction reported was $2.9434, and the range of prices were between $2.93 and $2.975. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.

Key Figures

Shares sold: 653 shares Weighted average sale price: $2.9434 per share Sale price range: $2.93 to $2.975 per share +1 more

4 metrics

Shares sold 653 shares Common stock sale reported for August 4, 2026

Weighted average sale price $2.9434 per share Weighted average price across the reported 653-share sale

Sale price range $2.93 to $2.975 per share Range of prices for shares sold in the reported transaction

Shares held after transaction 268,371 shares Direct common stock holdings of Yong Yu after the sale

Key Terms

restricted stock units, weighted average sale price, open market or private transaction

3 terms

restricted stock units financial

"vesting of restricted stock units to the Reporting Person"

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.

weighted average sale price financial

"The weighted average sale price for the transaction reported was $2.9434"

open market or private transaction financial

"transaction code description: Sale in open market or private transaction"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did GNLX report for Chief Scientific Officer Yong Yu?

Yong Yu reported a sale of 653 shares of GENELUX Corp common stock on August 4, 2026. The transaction was described as an open-market or private sale and left Yu with 268,371 shares of common stock held directly afterward.

At what price were the GNLX shares sold in Yong Yu's reported transaction?

The shares were sold at a weighted average price of $2.9434 per share. A footnote explains the sale prices ranged between $2.93 and $2.975, and detailed trade-by-trade pricing is available to regulators or security holders upon request.

Why did GENELUX Corp's CSO sell 653 GNLX shares?

A footnote explains the 653 shares were sold to cover estimated taxes owed by Yong Yu in connection with the vesting of restricted stock units. This indicates the sale was related to tax obligations arising from equity compensation vesting.

How many GNLX shares does Yong Yu hold after the reported sale?

After the transaction, Yong Yu directly held 268,371 shares of GENELUX Corp common stock. This figure reflects his direct ownership position immediately following the 653-share sale used to cover estimated tax obligations tied to restricted stock unit vesting.

Was Yong Yu's GNLX share sale made under a Rule 10b5-1 trading plan?

The report's Rule 10b5-1 checkbox is not marked, so the transaction is not reported as executed under a Rule 10b5-1 trading plan. The notes instead emphasize the sale's purpose of covering estimated taxes from restricted stock unit vesting.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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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^*

Yu Yong

(Last) (First) (Middle)

C/O GENELUX CORPORATION

2625 TOWNSGATE ROAD, SUITE 230

(Street)

WESTLAKE VILLAGE CALIFORNIA 91361

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
GENELUX Corp [ GNLX ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/04/2026

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	08/04/2026		S(1)		653	D	$2.9434(2)	268,371	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 shares sold by the Reporting Person to cover estimated taxes to be paid by the Reporting Person in connection with the vesting of restricted stock units.

2. The weighted average sale price for the transaction reported was $2.9434, and the range of prices were between $2.93 and $2.975. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.

	/s/ Thomas Zindrick, Attorney-in-Fact	08/04/2026
	** 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)