Lantronix 10% owner exercises 11,310 stock units

Lantronix Inc. Chief Product & Strategy Officer Gurusamy Mathi reported routine equity compensation activity in the form of restricted stock unit (RSU) vesting and related tax withholding.

Rhea-AI Filing Summary

Lantronix Inc. Chief Product & Strategy Officer Gurusamy Mathi reported routine equity compensation activity in the form of restricted stock unit (RSU) vesting and related tax withholding. On June 1, 2026, he exercised RSUs into 11,310 shares of common stock and had 4,057 shares withheld to cover required tax obligations. Following these non-market transactions, he directly holds 62,822 shares of common stock and 13,338 RSUs that will continue to vest over time under prior grant schedules.

Insider Trade Summary

11,310 shares exercised/converted

Exercise 5 txns

Insider Gurusamy Mathi

Role Chief Product & Strategy Ofcr

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	3,335	$0.00	$0.00
Exercise	Restricted Stock Units	7,975	$0.00	$0.00
Exercise	Common Stock	3,335	$0.00	$0.00
Exercise	Common Stock	7,975	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	4,057	$7.58	$31K

Holdings After Transaction: Restricted Stock Units — 45,237 contracts (Direct); Common Stock — 62,822 shares (Direct)

Footnotes (3)

1. F1. Represents restricted stock units ("RSUs") granted on July 1, 2024. The restricted stock units ("RSUs") shall vest such that one-third (1/3) of the shares vest on July 1, 2025 and the remaining two-thirds (2/3) of the total number of shares vest quarterly thereafter beginning on September 1, 2025, such that one hundred percent (100%) of the RSUs will be fully vested on June 1, 2027.
2. F2. Represents restricted stock units ("RSUs") granted on June 1, 2024. The restricted stock units ("RSUs") shall vest such that one-third (1/3) of the shares vest on June 1, 2025 and the remaining two-thirds (2/3) of the total number of shares vest quarterly thereafter beginning on September 1, 2025, such that one hundred percent (100%) of the RSUs will be fully vested on June 1, 2027.
3. F3. In accordance with the terms of the RSU Agreement, 4,057 shares of Lantronix, Inc. common stock were withheld at vesting to cover required tax withholding.

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Accepted by SEC EDGAR 06/02/2026 - 04:34 PM 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^*

Gurusamy Mathi

(Last) (First) (Middle)

C/O LANTRONIX, INC.

48 DISCOVERY SUITE 250

(Street)

IRVINE CALIFORNIA 92618

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
LANTRONIX INC [ LTRX ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Product & Strategy Ofcr

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/01/2026

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	06/01/2026		M(1)		3,335	A	$0	58,904	D
Common Stock	06/01/2026		M(2)		7,975	A	$0	66,879	D
Common Stock	06/01/2026		F(3)		4,057	D	$7.58	62,822	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
Restricted Stock Units	(1)	06/01/2026		M			3,335	(1)	(1)	Common Stock	3,335	$0	13,338	D
Restricted Stock Units	(2)	06/01/2026		M			7,975	(2)	(2)	Common Stock	7,975	$0	31,899	D

Explanation of Responses:

1. Represents restricted stock units ("RSUs") granted on July 1, 2024. The restricted stock units ("RSUs") shall vest such that one-third (1/3) of the shares vest on July 1, 2025 and the remaining two-thirds (2/3) of the total number of shares vest quarterly thereafter beginning on September 1, 2025, such that one hundred percent (100%) of the RSUs will be fully vested on June 1, 2027.

2. Represents restricted stock units ("RSUs") granted on June 1, 2024. The restricted stock units ("RSUs") shall vest such that one-third (1/3) of the shares vest on June 1, 2025 and the remaining two-thirds (2/3) of the total number of shares vest quarterly thereafter beginning on September 1, 2025, such that one hundred percent (100%) of the RSUs will be fully vested on June 1, 2027.

3. In accordance with the terms of the RSU Agreement, 4,057 shares of Lantronix, Inc. common stock were withheld at vesting to cover required tax withholding.

	/s/ Brent Stringham, Attorney-in-fact for Mathi Gurusamy	06/02/2026
	** 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)