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Lantronix (LTRX) CFO has RSUs vest, withholds shares to cover tax bill

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Lantronix Inc. Chief Financial Officer Brent Michael Stringham reported equity compensation activity on July 11, 2026. 33,770 restricted stock units converted into common stock, with 14,818 shares withheld to cover tax obligations, resulting in 126,402 common shares held directly.

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Insider Stringham Brent Michael
Role Chief Financial Officer
Type Security Shares Price Value
Exercise Restricted Stock Units 33,770 $0.00 --
Exercise Common Stock 33,770 $0.00 --
Tax Withholding Common Stock 14,818 $5.60 $83K
Holdings After Transaction: Restricted Stock Units — 68,566 shares (Direct); Common Stock — 126,402 shares (Direct)
Footnotes (1)
  1. Represents restricted stock units ("RSUs") granted on July 11, 2025. The restricted stock units ("RSUs") shall vest such that one-third (1/3) of the shares vest on July 11, 2026 and the remaining two-thirds (2/3) of the total number of shares vest quarterly thereafter beginning on September 1, 2026, such that one hundred percent (100%) of the RSUs will be fully vested on June 1, 2028. In accordance with the terms of the applicable RSU award agreements, 14,818 shares of Lantronix, Inc. common stock were withheld at vesting to cover required tax withholding.
RSUs converted to common stock 33,770 shares Restricted Stock Units converted on July 11, 2026
Shares withheld for taxes 14,818 shares Common stock withheld at vesting to cover required tax withholding
Common shares held after transactions 126,402 shares Direct Lantronix common stock holdings following July 11, 2026 events
RSUs remaining after conversion 68,566 units Restricted stock units outstanding after the reported RSU conversion
Tax-withholding transaction value indicator $5.60 per share Per-share value used for the 14,818-share F-code tax-withholding disposition
Restricted Stock Units financial
"Represents restricted stock units ("RSUs") granted on July 11, 2025."
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.
vest financial
"The restricted stock units ("RSUs") shall vest such that one-third (1/3) of the shares vest"
A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.
tax withholding financial
"shares of Lantronix, Inc. common stock were withheld at vesting to cover required tax withholding."
Tax withholding is the practice of taking a portion of a payment—such as wages, dividends, or sale proceeds—before it reaches the recipient and sending that portion to the tax authority as an advance on the recipient’s eventual tax bill. For investors it matters because withholding reduces immediate cash received and affects after‑tax returns, estimated tax payments, and whether you may owe more or receive a refund when taxes are finally calculated, like having a small automatic savings set aside for your tax bill.
derivative security financial
"transaction_code_description": "Exercise or conversion of derivative security""
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
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FAQ

What insider activity did Lantronix (LTRX) report for CFO Brent Stringham?

Lantronix reported that CFO Brent Michael Stringham had 33,770 restricted stock units convert into common stock on July 11, 2026. As part of this vesting event, some shares were withheld to satisfy tax obligations rather than sold on the open market.

How many Lantronix (LTRX) RSUs vested and converted into common stock?

On July 11, 2026, 33,770 restricted stock units held by CFO Brent Stringham converted into Lantronix common stock. These RSUs stem from an award granted on July 11, 2025, which vests over multiple years according to the stated vesting schedule.

How many Lantronix (LTRX) shares were withheld for taxes in this Form 4?

At vesting, 14,818 shares of Lantronix common stock were withheld to cover required tax withholding. This tax-withholding disposition is coded as an F transaction and does not represent an open-market sale of shares by the CFO.

What are Brent Stringham’s Lantronix (LTRX) common share holdings after the transactions?

Following the July 11, 2026 transactions, CFO Brent Stringham directly holds 126,402 shares of Lantronix common stock. This figure reflects the RSU conversion and the shares withheld for tax purposes reported in the same Form 4 filing.

What is the vesting schedule for the July 11, 2025 Lantronix (LTRX) RSU grant?

The RSUs granted on July 11, 2025 vest so that one-third vests on July 11, 2026, with the remaining two-thirds vesting quarterly beginning September 1, 2026. All units are scheduled to be fully vested by June 1, 2028 if service conditions are met.

Does the Lantronix (LTRX) Form 4 show any open-market stock purchases or sales?

No open-market purchases or sales are reported. The filing shows a derivative exercise of RSUs and an F-code tax-withholding disposition, where 14,818 shares were withheld to cover taxes rather than sold through market transactions.
SEC Form 4
FORM 4UNITED 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*
Stringham Brent Michael

(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)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Financial Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
07/11/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock07/11/2026M(1)33,770A$0126,402D
Common Stock07/11/2026F(2)14,818D$5.6111,584D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units(1)07/11/2026M33,770 (1) (1)Common Stock33,770$068,566D
Explanation of Responses:
1. Represents restricted stock units ("RSUs") granted on July 11, 2025. The restricted stock units ("RSUs") shall vest such that one-third (1/3) of the shares vest on July 11, 2026 and the remaining two-thirds (2/3) of the total number of shares vest quarterly thereafter beginning on September 1, 2026, such that one hundred percent (100%) of the RSUs will be fully vested on June 1, 2028.
2. In accordance with the terms of the applicable RSU award agreements, 14,818 shares of Lantronix, Inc. common stock were withheld at vesting to cover required tax withholding.
/s/ Brent Stringham07/14/2026
** Signature of Reporting PersonDate
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)