Brent Michael Stringham - 01 Sep 2026 Form 4 Insider Report for LANTRONIX INC (LTRX)

Reporting relationship: Chief Financial Officer
Issuer ticker: LTRX
Reported as of: 01 Sep 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 03 Sep 2026, 16:14:11 UTC
Prior SEC filing: 28 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Brent Stringham

Key filing fact

Brent Michael Stringham filed Form 4 for LANTRONIX INC (LTRX) on 03 Sep 2026.

Key facts

This page summarizes Brent Michael Stringham's Form 4 filing for LANTRONIX INC (LTRX).
10 reported transactions and 4 derivative rows are listed below.
Accepted by SEC: 03 Sep 2026, 16:14.

Change

Previous filing in this sequence was filed on 28 Aug 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002038019 Primary reporting owner

Stringham Brent Michael

Relationship: Chief Financial Officer
Address: C/O LANTRONIX, INC, 48 DISCOVERY SUITE 250, IRVINE
Signature: /s/ Brent Stringham
Signature date: 03 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

LTRX transaction

Common Stock

Options Exercise

Transaction value
Shares: +551
Change %: +0.49%
Price: $0.000000^*
Shares after: 112,135
Date: 01 Sep 2026
Ownership: Direct
Footnotes: F1

LTRX transaction

Common Stock

Options Exercise

Transaction value
Shares: +3,224
Change %: +2.9%
Price: $0.000000^*
Shares after: 115,359
Date: 01 Sep 2026
Ownership: Direct
Footnotes: F2

LTRX transaction

Common Stock

Options Exercise

Transaction value
Shares: +8,571
Change %: +7.4%
Price: $0.000000^*
Shares after: 123,930
Date: 01 Sep 2026
Ownership: Direct
Footnotes: F3

LTRX transaction

Common Stock

Tax liability

Transaction value
Shares: -5,415
Change %: -4.4%
Price: $5.15^*
Shares after: 118,515
Date: 01 Sep 2026
Ownership: Direct
Footnotes: F4

LTRX transaction

Common Stock

Options Exercise

Transaction value
Shares: +18,463
Change %: +16%
Price: $0.000000^*
Shares after: 136,978
Date: 01 Sep 2026
Ownership: Direct
Footnotes: F5

LTRX transaction

Common Stock

Tax liability

Transaction value
Shares: -8,101
Change %: -5.9%
Price: $5.15^*
Shares after: 128,877
Date: 01 Sep 2026
Ownership: Direct
Footnotes: F6

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

LTRX transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -551
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 01 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 551
Exercise price
Footnotes: F1

LTRX transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -3,224
Change %: -20%
Price: $0.000000^*
Shares after: 12,893
Date: 01 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 3,224
Exercise price
Footnotes: F2

LTRX transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -8,571
Change %: -13%
Price: $0.000000^*
Shares after: 59,995
Date: 01 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 8,571
Exercise price
Footnotes: F3

LTRX transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -18,463
Change %: -42%
Price: $0.000000^*
Shares after: 25,852
Date: 01 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 18,463
Exercise price
Footnotes: F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 6 footnotes

Footnote F1

Represents outstanding restricted stock units ("RSUs") granted on October 3, 2023. The remaining unvested shares subject to the RSUs vest ratably in equal quarterly installments through September 1, 2026. Each RSU represents the right to receive one share of the issuer's common stock.

Footnote F2

Represents outstanding RSUs granted on October 1, 2024. The RSUs shall vest such that one-third (1/3) of the shares vest on September 1, 2025 and the remaining two-thirds (2/3) of the total number of shares vest quarterly thereafter beginning on December 1, 2025, such that one hundred percent (100%) of the RSUs will be fully vested on September 1, 2027. Each RSU represents the right to receive one share of the issuer's common stock.

Footnote F3

Represents RSUs granted on July 11, 2025. The 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.

Footnote F4

In accordance with the terms of the applicable RSU award agreements, 5,415 shares of Lantronix, Inc. common stock were withheld at vesting to cover required tax withholding.

Footnote F5

On July 11, 2025, the reporting person was granted RSUs with performance-based vesting requirements. The number of RSUs that were eligible to vest based on certain earnings per share targets and revenue targets for fiscal 2026 shall vest such that 18,463 shares vest on September 1, 2026 and the remaining 25,852 shares vest quarterly thereafter beginning December 1, 2026 such that one hundred percent (100%) of the RSUs will be fully vested on June 1, 2028.

Footnote F6

In accordance with the terms of the applicable RSUs with performance-based vesting requirements award agreements, 8,101 shares of Lantronix, Inc. common stock were withheld at vesting to cover required tax withholding.