Genelux (GNLX) CSO Yu Yong sells 605 shares to cover RSU tax bill

Rhea-AI Filing Summary

GENELUX Corp Chief Scientific Officer Yu Yong reported a small share sale primarily for tax purposes. On this Form 4, he sold 605 shares of common stock at a weighted average price of $2.9726 per share to cover estimated taxes related to the vesting of restricted stock units. Following this sale, he directly owns 149,706 shares of GENELUX common stock.

Insider Trade Summary

Net Seller: 605 shares ($1,798)

Net Sell 1 txn

Insider Yu Yong

Role Chief Scientific Officer

Sold 605 shs ($2K)

Type	Security	Shares	Price	Value
Sale	Common Stock	605	$2.9726	$2K

Holdings After Transaction: Common Stock — 149,706 shares (Direct, null)

Footnotes (1)

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. The weighted average sale price for the transaction reported was $2.9726, and the range of prices were between $2.95 and $3.02. 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: 605 shares Weighted average sale price: $2.9726 per share Shares held after transaction: 149,706 shares +1 more

4 metrics

Shares sold 605 shares Common stock sold on 2026-05-11

Weighted average sale price $2.9726 per share Open-market sale price range $2.95–$3.02

Shares held after transaction 149,706 shares Direct ownership following the reported sale

Price range $2.95–$3.02 Range of prices for the 605 shares sold

Key Terms

restricted stock units, weighted average sale price, open-market sale, beneficial ownership

4 terms

restricted stock units financial

"in connection with the vesting of restricted stock units"

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 $2.9726"

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

beneficial ownership financial

"full information regarding the number of shares sold at each separate price will be provided"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

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^*

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)
05/11/2026

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	05/11/2026		S(1)		605	D	$2.9726(2)	149,706	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 $2.9726, and the range of prices were between $2.95 and $3.02. 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, J.D., Attorney-in-Fact	05/12/2026
	** 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 GENELUX (GNLX) report for Yu Yong?

GENELUX reported that Chief Scientific Officer Yu Yong sold 605 shares of common stock. The sale was made primarily to cover estimated taxes due on recently vesting restricted stock units, rather than as a discretionary reduction of his investment position.

At what price did Yu Yong sell GENELUX (GNLX) shares on this Form 4?

Yu Yong sold the 605 GENELUX common shares at a weighted average price of $2.9726. The reported sale prices ranged between $2.95 and $3.02, and detailed breakdowns by exact price level are available upon request from the company or SEC staff.

Why did Yu Yong sell GENELUX (GNLX) shares according to the Form 4?

The Form 4 states that Yu Yong sold shares to cover estimated taxes owed in connection with the vesting of restricted stock units. This type of tax-related sale is typically mechanistic compensation administration rather than a discretionary trade based on market views.

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

After selling 605 shares, Yu Yong directly holds 149,706 shares of GENELUX common stock. This indicates the reported transaction represents only a small portion of his total position, with the vast majority of his holdings remaining unchanged by this filing.

Was Yu Yong’s GENELUX (GNLX) share sale an open-market transaction?

The transaction is coded as an open-market sale, with a weighted average price of $2.9726 and a range of $2.95 to $3.02. However, the footnote clarifies it was executed to cover estimated taxes tied to restricted stock unit vesting.