# EDGAR Filing Document

**Accession Number:** 0001429778
**File Stem:** 0001683168-25-008964
**Filing Date:** 2025-12
**Character Count:** 12307
**Document Hash:** 8d6ede3cce11d8a5c36e63577de75212
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001683168-25-008964.hdr.sgml**: 20251208

**ACCESSION NUMBER**: 0001683168-25-008964

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251208

**DATE AS OF CHANGE**: 20251208

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** LANTRONIX INC
- **CENTRAL INDEX KEY:** 0001114925
- **STANDARD INDUSTRIAL CLASSIFICATION:** COMPUTER COMMUNICATIONS EQUIPMENT [3576]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 330362767
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0630

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-60979
- **FILM NUMBER:** 251554666

**BUSINESS ADDRESS:**
- **STREET 1:** 48 DISCOVERY, SUITE 250
- **CITY:** IRVINE
- **STATE:** CA
- **ZIP:** 92618
- **BUSINESS PHONE:** 9494533990

**MAIL ADDRESS:**
- **STREET 1:** 48 DISCOVERY, SUITE 250
- **CITY:** IRVINE
- **STATE:** CA
- **ZIP:** 92618
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** TL Investment GmbH
- **CENTRAL INDEX KEY:** 0001429778

**ORGANIZATION NAME:**
- **EIN:** 000000000

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** BIESINGERSTR. 27
- **CITY:** TUBINGEN
- **PROVINCE COUNTRY:** 2M
- **ZIP:** 72070
- **BUSINESS PHONE:** 49 7071 94930

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** BIESINGERSTR. 27
- **CITY:** TUBINGEN
- **PROVINCE COUNTRY:** 2M
- **ZIP:** 72070

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 9)**

**LANTRONIX INC**

*(Name of Issuer)*

**Common Stock, par value $0.0001**

*(Title of Class of Securities)*

**516548203**

*(CUSIP Number)*

**TL Investment GmbH**<br>Biesingerstr. 27<br>Tuebingen 2M 72070<br>07071 9755280

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**12/01/2025**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **516548203** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**TL Investment GmbH** | Name of reporting person<br>**TL Investment GmbH** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**2M** | Citizenship or place of organization<br>**2M** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**0.00** | Aggregate amount beneficially owned by each reporting person<br>**0.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0%** | Percent of class represented by amount in Row (11)<br>**0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IV** | Type of Reporting Person (See Instructions)<br>**IV** | |

---

**Comment for Reporting Person:** For Items 7 -13: Immediately prior to the transfers discussed herein, TL Investment held sole voting power and sole dispositive power over 5,166,471 shares of Common Stock, par value $0.0001 per share, which represented approximately 13.1% of the Common Stock, calculated based on 39,358,610  shares of Common Stock, par value $0.0001 per share, outstanding as of November 1, 2025, as reported in the Issuer's Form 10-Q for the quarterly period ended September 30, 2025.

| **CUSIP No.** | **516548203** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**BRUSCHA BERNHARD** | Name of reporting person<br>**BRUSCHA BERNHARD** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**2M** | Citizenship or place of organization<br>**2M** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**2347925.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**2347925.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**2347925.00** | Aggregate amount beneficially owned by each reporting person<br>**2347925.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**6.0%** | Percent of class represented by amount in Row (11)<br>**6.0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** Items 7, 9, 11 and 13:  Immediately prior to the transfers discussed herein, Mr. Bruscha held sole voting power and sole dispositive power over 5,347,925 shares of Common Stock, par value $0.0001 per share, which represented approximately 13.1% of the Issuer's Common Stock, calculated based on 39,358,610 shares of Common Stock, par value $0.0001 per share, outstanding as of November 1, 2025, as reported in the Issuer's Form 10-Q for the quarterly period ended September 30, 2025.These shares consisted of 5,166,471 shares of Common Stock held by TL Investment, for whom Mr. Bruscha served as the sole managing director, and 181,454 shares held directly.  Effective December 1, 2025, Mr. Bruscha transferred 3,000,000 shares to TL Stiftung.

| **CUSIP No.** | **516548203** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Manfred Rubin-Schwarz** | Name of reporting person<br>**Manfred Rubin-Schwarz** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**2M** | Citizenship or place of organization<br>**2M** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**0.00** | Aggregate amount beneficially owned by each reporting person<br>**0.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0%** | Percent of class represented by amount in Row (11)<br>**0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** For Items 7 -13: Mr. Rubin-Schwarz previously served as co-managing director of TL Investment, until his retirement on December 31, 2023.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock, par value $0.0001

**(b) Name of Issuer:**
LANTRONIX INC

**(c) Address of Issuer's Principal Executive Offices:**
48 Discovery, Suite 250, Irvine, CA, 92618

**Item 4. Purpose of Transaction**

Item 4 is hereby amended to add the following:

On December 1, 2025, TL Investment transferred to Mr. Bruscha all 5,166,471 shares of Common Stock of the Issuer held by TL Investment.  On that same date, Mr. Bruscha gifted 3,000,000 shares, to TL Stiftung, as a gift. Accordingly, as of December 1, 2025, TL Investment ceased to have beneficial ownership of any shares of Common Stock, and Mr. Bruscha was the beneficial owner of 2,347,925 shares of Common Stock.

Mr. Bruscha resigned from the Board of Directors of the Issuer effective November 9, 2021, and currently holds no positions with the Issuer. Manfred Rubin-Schwarz retired as one of the two managing directors of TL Investment on December 31, 2023.

**Item 5. Interest in Securities of the Issuer**

**(a)**
The information contained on each of the cover pages of this Amendment No. 9 to the Statement is hereby incorporated by reference herein.

**(b)**
The information contained on each of the cover pages of this Amendment No. 9 to the Statement is hereby incorporated by reference herein.

**(c)**
Except as set forth in Item 4 of this Amendment, which information is incorporated by reference into this Item 5(c), none of the Reporting Persons has effected any transactions in the Common Stock during the past 60 days, except that on October 7, 2025, Mr. Bruscha vested with respect to 25,000 shares of Common Stock previously granted to Mr. Bruscha pursuant to the Lantronix, Inc. Amended and Restated 2010 Stock Incentive Plan.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

Item 6 is hereby amended to add the following:

The information set forth in Item 4 of this Amendment is incorporated by reference into this Item 6.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** TL Investment GmbH

**Signature:** /s/ Bernhard Bruscha

**Name/Title:** Bernhard Bruscha - Managing Member

**Date:** 12/08/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** BRUSCHA BERNHARD

**Signature:** /s/ Bernhard Bruscha

**Name/Title:** Bernhard Bruscha

**Date:** 12/08/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Manfred Rubin-Schwarz

**Signature:** /s/ Manfred Rubin-Schwarz

**Name/Title:** Manfred Rubin-Schwarz

**Date:** 12/08/2025