As of November 9, 2026, 4 holders' latest Schedule 13D or 13G filings report owning 5% or more of Lantronix, Inc. The largest reported stake is Needham Investment Management L.L.C.'s, at 7.1%. 9 filings are on record since July 1, 2025 (Schedule 13G, July 2, 2026).
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Key facts
- · Reporting person: Portolan Capital Management, LLC · Sole voting: 2,405,785 · Shared voting: 0 · Sole dispositive: 2,405,785 · Shared dispositive: 0 · SCHEDULE 13G, 2026-10-13
- · Reporting person: Strider Capital, LLC · Sole voting: 0 · Shared voting: 0 · Sole dispositive: 2,552,359 · Shared dispositive: 0 · SCHEDULE 13G, 2026-09-28
- · Reporting person: Needham Investment Management L.L.C. · Sole voting: 0 · Shared voting: 3,150,000 · Sole dispositive: 0 · Shared dispositive: 3,150,000 · SCHEDULE 13G, 2026-07-02
- · Holder: Chain of Lakes Investment Fund, LLC · Percent: 3% · SCHEDULE 13D/A
- · Holder: TL Stiftung · Percent: 0% · SCHEDULE 13G/A
Lantronix, Inc. has 9 Schedule 13D or 13G filings on record since 2025-07-01. 4 holders' latest filing reports 5% or more of common stock, $0.0001 par value. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Needham Investment Management L.L.C. | 7.1% | 3,150,000 | SCHEDULE 13G, 2026-07-02 | 2026-06-18 |
| TL Investment GmbH | 6% | 0 | SCHEDULE 13D/A, 2025-12-08 | 2025-12-01 |
| Strider Capital, LLC | 5.5% | 2,552,359 | SCHEDULE 13G, 2026-09-28 | 2026-06-30 |
| Portolan Capital Management, LLC | 5.15% | 2,405,785 | SCHEDULE 13G, 2026-10-13 | 2026-10-06 |
| Chain of Lakes Investment Fund, LLC | 3% | 395,441 | SCHEDULE 13D/A, 2026-03-12 | 2026-03-10 |
| 0% | 0 | SCHEDULE 13G/A, 2026-02-06 | 2026-01-29 |
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More on Lantronix, Inc. and the records around it.
Lantronix, Inc. elsewhere on the record
Companies that share a holder
- STRIDER CAPITAL, LLC also filed stake reports on 1 other company: Mobilicom Ltd (Sep 2026)
- Needham Investment Management L.L.C. also filed stake reports on 13 other companies: Aspen Aerogels Inc (Aug 2026), Elmet Group Co. (Aug 2026), Precision Optics Corporation, Inc. (May 2026)
- Portolan Capital Management, LLC also filed stake reports on 13 other companies: SILICOM LTD. (Sep 2026), Quanterix Corp (Aug 2026), Real Brokerage Inc (Aug 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Needham Investment Management L.L.C. | 0 | 3,150,000 | 0 | 3,150,000 | SCHEDULE 13G, 2026-07-02 |
| Needham Asset Management, LLC | 0 | 3,150,000 | 0 | 3,150,000 | SCHEDULE 13G, 2026-07-02 |
| Needham Aggressive Growth Fund | 0 | 2,400,000 | 0 | 2,400,000 | SCHEDULE 13G, 2026-07-02 |
| George A. Needham | 0 | 3,150,000 | 0 | 3,150,000 | SCHEDULE 13G, 2026-07-02 |
| Strider Capital, LLC | 0 | 0 | 2,552,359 | 0 | SCHEDULE 13G, 2026-09-28 |
| Portolan Capital Management, LLC | 2,405,785 | 0 | 2,405,785 | 0 | SCHEDULE 13G, 2026-10-13 |
| George McCabe | 2,405,785 | 0 | 2,405,785 | 0 | SCHEDULE 13G, 2026-10-13 |
The latest filing identifies Lantronix, Inc. by CUSIP 516548203 and gives its principal executive office as 48 Discovery, Suite 250, Irvine, CA 92618 (SCHEDULE 13G, 2026-10-13).
Purpose of Transaction (Item 4)
Chain of Lakes Investment Fund, LLC
As described in the Original Schedule 13D, the Reporting Persons originally acquired the shares in the Issuer because they believed the Shares were materially undervalued and represented an attractive investment opportunity. As a result of the foregoing and as disclosed in detail in Item 4 of the Original Schedule 13D, the Reporting Persons considered taking one or more actions described in subjections (a) through (j) of Item 4 of Schedule 13D, and intended to seek to replace a majority of the current members of the Board of the Issuer with candidates that were committed to an expedited return of shareholders' capital through a sale of the Issuer by running a competing proxy statement at the Issuer's 2025 Annual Meeting of Stockholders. Subsequent to the filing of the Original Schedule 13D and as described in detail in Amendment No. 1, the Reporting Persons engaged in discussions with the Issuer, and the parties have agreed to resolve their differences with respect to this matter by entering into a Cooperation Agreement dated June 24, 2025 (the "Cooperation Agreement"). A copy of the Cooperation Agreement was filed as Exhibit 1 to Amendment No. 1. The Reporting Persons intend to review their investment in the Issuer on a continuing basis, and depending on various factors, may in the future take such actions with respect to their investment in the Issuer as they deem appropriate, subject to compliance with the terms of the Cooperation Agreement.Item 4 of the SCHEDULE 13D/A filed 2026-03-12
TL Investment GmbH
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 4 of the SCHEDULE 13D/A filed 2025-12-08
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-01 | Chain of Lakes Investment Fund, LLC | 4.3% | SCHEDULE 13D/A |
| 2025-12-08 | TL Investment GmbH | 6% | SCHEDULE 13D/A |
| 2025-12-08 | TL Stiftung | 7.6% | SCHEDULE 13G |
| 2026-01-30 | Chain of Lakes Investment Fund, LLC | 3.6% | SCHEDULE 13D/A |
| 2026-02-06 | TL Stiftung | 0% | SCHEDULE 13G/A |
| 2026-03-12 | Chain of Lakes Investment Fund, LLC | 3% | SCHEDULE 13D/A |
| 2026-07-02 | Needham Investment Management L.L.C. | 7.1% | SCHEDULE 13G |
| 2026-09-28 | Strider Capital, LLC | 5.5% | SCHEDULE 13G |
| 2026-10-13 | Portolan Capital Management, LLC | 5.15% | SCHEDULE 13G |
Questions about who owns Lantronix, Inc.
Who owns Lantronix, Inc.?
On this page, 4 holders' latest ownership filings report 5% or more of Lantronix, Inc.: Needham Investment Management L.L.C. (7.1%, Schedule 13G, filed 2026-07-02), TL Investment GmbH (6%, Schedule 13D/A, filed 2025-12-08), Strider Capital, LLC (5.5%, Schedule 13G, filed 2026-09-28) and Portolan Capital Management, LLC (5.15%, Schedule 13G, filed 2026-10-13).
Who are the largest shareholders of Lantronix, Inc.?
By the share each holder's latest filing reports, the largest holders of Lantronix, Inc. on this page are Needham Investment Management L.L.C. (7.1%), TL Investment GmbH (6%) and Strider Capital, LLC (5.5%).
When did Needham Investment Management L.L.C. buy into Lantronix, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Needham Investment Management L.L.C. on this page is the Schedule 13G, filed 2026-07-02, reporting 7.1%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 9 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.