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SCHEDULE 13D/A 0001683168-21-005965 0001429778 XXXXXXXX LIVE 9 Common Stock, par value $0.0001 12/01/2025 false 0001114925 516548203 LANTRONIX INC 48 Discovery, Suite 250 Irvine CA 92618 TL Investment GmbH 07071 9755280 Biesingerstr. 27 Tuebingen 2M 72070 0001429778 N TL Investment GmbH OO N 2M 0.00 0.00 0.00 0.00 0.00 N 0 IV 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. 0001134246 N BRUSCHA BERNHARD OO N 2M 2347925.00 0.00 2347925.00 0.00 2347925.00 N 6.0 IN 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. Y Manfred Rubin-Schwarz OO N 2M 0.00 0.00 0.00 0.00 0.00 N 0 IN For Items 7 -13: Mr. Rubin-Schwarz previously served as co-managing director of TL Investment, until his retirement on December 31, 2023. Common Stock, par value $0.0001 LANTRONIX INC 48 Discovery, Suite 250 Irvine CA 92618 Item 3 is hereby amended to add the following: On December 1, 2025, the shares of Common Stock held by TL Investment were transferred to TL Investment's sole owner, Mr. Bruscha, and then 3,000,000 shares were immediately gifted by Mr. Bruscha to TL Stiftung, a charitable foundation based in Tuebingen, Germany ("TL Stiftung"). 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. The information contained on each of the cover pages of this Amendment No. 9 to the Statement is hereby incorporated by reference herein. The information contained on each of the cover pages of this Amendment No. 9 to the Statement is hereby incorporated by reference herein. 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. As of December 31, 2023, Mr. Rubin-Schwarz ceased to beneficially own more than 5% of the outstanding Common Stock of the Issuer. As of December 1, 2025, TL Investment ceased to beneficially own more than 5% of the outstanding Common Stock 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. https://www.sec.gov/Archives/edgar/data/1114925/000101968708005112/ltrx_sc13d-111008.htm TL Investment GmbH /s/ Bernhard Bruscha Bernhard Bruscha - Managing Member 12/08/2025 BRUSCHA BERNHARD /s/ Bernhard Bruscha Bernhard Bruscha 12/08/2025 Manfred Rubin-Schwarz /s/ Manfred Rubin-Schwarz Manfred Rubin-Schwarz 12/08/2025