Genelux CTO sells 10,257 shares to cover taxes

GENELUX Corp’s chief technical officer sold shares to cover taxes from RSU vesting, retaining over three hundred thousand shares afterward.

Rhea-AI Filing Summary

GENELUX Corp (GNLX) reported that Chief Technical Officer Joseph Cappello sold 10,257 shares of common stock on August 31, 2026 at a weighted average price of $2.7408 per share, with prices ranging from $2.70 to $2.78. The shares were sold to cover estimated taxes arising from the vesting of restricted stock units, and he held 318,480 shares directly afterward. No Rule 10b5-1 trading plan is reported for this transaction.

Insider Trade Summary

Net Seller: 10,257 shares

Net Sell 1 txn

Insider Cappello Joseph

Role Chief Technical Officer

Sold 10,257 shs ($28K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	10,257	$2.7408	$28K

Holdings After Transaction: Common Stock — 318,480 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 $2.7408, and the range of prices were between $2.70 and $2.78. 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: 10,257 shares Weighted average sale price: $2.7408 per share Price range: $2.70–$2.78 per share +2 more

5 metrics

Shares sold 10,257 shares Common stock sold by CTO Joseph Cappello on August 31, 2026

Weighted average sale price $2.7408 per share Sale of 10,257 GENELUX Corp common shares on August 31, 2026

Price range $2.70–$2.78 per share Range of prices for the reported sale transaction

Shares held after transaction 318,480 shares Direct ownership of GENELUX Corp common stock after the sale

Net insider share change -10,257 shares Net sell activity for this Form 4 filing

Key Terms

restricted stock units, weighted average sale price, estimated taxes

3 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 $2.7408"

estimated taxes financial

"shares sold by the Reporting Person to cover estimated taxes to be paid"

FAQ

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

What insider transaction did GENELUX Corp (GNLX) report for Joseph Cappello?

GENELUX Corp reported that Chief Technical Officer Joseph Cappello sold 10,257 shares of common stock on August 31, 2026, primarily to cover estimated taxes related to the vesting of restricted stock units.

At what price were the GNLX shares sold in this Form 4 filing?

The filing states a weighted average sale price of $2.7408 per GNLX share, with individual transaction prices ranging between $2.70 and $2.78 on August 31, 2026.

How many GNLX shares does Joseph Cappello hold after this reported sale?

After the August 31, 2026 sale, Chief Technical Officer Joseph Cappello is reported to hold 318,480 shares of GENELUX Corp common stock directly.

Why did GENELUX Corp’s CTO sell 10,257 GNLX shares?

According to the filing footnote, the 10,257 shares were sold to cover estimated taxes payable by the reporting person in connection with the vesting of restricted stock units.

Was the GNLX insider sale made under a Rule 10b5-1 trading plan?

The document-level Rule 10b5-1 checkbox is not marked as affirmative, and no footnote indicates a trading plan, so the sale is not reported as made under a Rule 10b5-1 plan.

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

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Available on EDGAR 09/02/2026 - 07:05 PM EDT Accepted by SEC EDGAR 09/02/2026 - 07:05 PM EDT 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^*

Cappello Joseph

(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 Technical Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/31/2026

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	08/31/2026		S(1)		10,257	D	$2.7408(2)	318,480	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 $2.7408, and the range of prices were between $2.70 and $2.78. 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	09/02/2026
	** 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)