As of November 10, 2026, 2 holders' latest Schedule 13D or 13G filings report owning 5% or more of Matternet, Inc. (f/k/a Los Altos Ventures Corp.). The largest reported stake is Andreas Raptopoulos', at 16.1%. 6 filings are on record since November 14, 2025 (Schedule 13D, June 1, 2026).
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Key facts
- · Reporting person: Ian Jacobs · Sole voting: 475,000 · Shared voting: 0 · Sole dispositive: 475,000 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-08-18
- · Holder: Ian Jacobs · Percent: 0.7% · SCHEDULE 13G/A
- · Reporting person: Andreas Raptopoulos · Sole voting: 8,062,927 · Shared voting: 0 · Sole dispositive: 8,062,927 · Shared dispositive: 0 · SCHEDULE 13D, 2026-06-01
- · Reporting person: Mark N. Tompkins · Sole voting: 4,729,166 · Shared voting: 0 · Sole dispositive: 4,729,166 · Shared dispositive: 0 · SCHEDULE 13G, 2026-06-01
- · Holder: Mark N. Tompkins · Percent: 75% · SCHEDULE 13G
Matternet, Inc. (f/k/a Los Altos Ventures Corp.) has 6 Schedule 13D or 13G filings on record since 2025-11-14. 2 holders' latest filing reports 5% or more of common stock, par value $0.0001 per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| 16.1% | 8,062,927 | SCHEDULE 13D, 2026-06-01 | 2026-05-22 | |
| 9.9% | 4,729,166 | SCHEDULE 13G, 2026-06-01 | 2026-05-22 | |
| 0.98% | 475,000 | SCHEDULE 13G/A, 2026-08-18 | 2026-06-30 |
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Keep reading
More on Matternet, Inc. (f/k/a Los Altos Ventures Corp.) and the records around it.
The people at Matternet, Inc. (f/k/a Los Altos Ventures Corp.)
- Laurence Marton is also named on 4 other Form D filings: RenovoRx, Inc. (Apr 2026), Matternet, Inc. (Mar 2026)
- Alexander Norman-Elvenich, Andreas Raptopoulos, Jason Secore and Saurabh Ranjan are also named on 2 other Form D filings: Matternet, Inc. (Mar 2026)
Matternet, Inc. (f/k/a Los Altos Ventures Corp.) elsewhere on the record
- Leadership changes Jul 2026
- Form D filing Jun 2026
- Acquisition May 2026
- Who owns it
Companies that share a holder
- Mark N. Tompkins also filed stake reports on 8 other companies: Aeluma, Inc. (May 2026), Deep Fission, Inc. (May 2026), Deep Isolation Nuclear, Inc. (May 2026)
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What the Full Report on Matternet, Inc. (f/k/a Los Altos Ventures Corp.) covers
The Short Answer
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The Money: Funding, Valuation, Runway
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Andreas Raptopoulos | 8,062,927 | 0 | 8,062,927 | 0 | SCHEDULE 13D, 2026-06-01 |
| Mark N. Tompkins | 4,729,166 | 0 | 4,729,166 | 0 | SCHEDULE 13G, 2026-06-01 |
| Ian Jacobs | 475,000 | 0 | 475,000 | 0 | SCHEDULE 13G/A, 2026-08-18 |
The latest filing identifies Matternet, Inc. (f/k/a Los Altos Ventures Corp.) by CUSIP 000000000 and gives its principal executive office as 355 Ravendale Drive, Mountain View, California (SCHEDULE 13G/A, 2026-08-18).
Source of funds (Item 3)
All of the shares of Common Stock to which this Schedule 13D relates were acquired by the Reporting Person in connection with the consummation of the closing on May 22, 2026 (the "Closing Date") of the transactions contemplated by the Agreement and Plan of Merger and Reorganization dated as of May 22, 2026, by and among Los Altos Ventures Corp. ("LAVC"), Matternet Acquisition Co., a wholly-owned subsidiary of LAVC ("Acquisition Sub") and Matternet Operations, Inc. (fka Matternet, Inc.) ("Legacy Matternet") (the "Merger Agreement").Andreas Raptopoulos, SCHEDULE 13D, 2026-06-01
Purpose of Transaction (Item 4)
Andreas Raptopoulos
The Reporting Person acquired the Common Stock in connection with the Merger. The information contained in Item 3 of this Schedule 13D is incorporated herein by reference. The Reporting Person serves as a member of the Board of Directors and President and Chief Executive Officer of the Issuer. Accordingly, the Reporting Person may have influence over the corporate activities of the Issuer, including activities that may relate to items described in clauses (a) through (j) of Item 4 of this Schedule 13D. Subject to the Registration Rights Agreement described in Item 6 of this Schedule 13D, the Reporting Person may, from time to time, purchase or sell securities of the Issuer as appropriate for his personal circumstances. Except as described in this Schedule 13D, the Reporting Person does not have any present plans or proposals that relate to or would result in any of the actions described in clauses (a) through (j) of Item 4 of this Schedule 13D. The Reporting Person reserves the right to formulate plans and/or proposals and to take such actions with respect to his investment in the Issuer, including any or all of the actions set forth in clauses (a) through (j) of Item 4 of this Schedule 13D.Item 4 of the SCHEDULE 13D filed 2026-06-01
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-11-14 | Mark N. Tompkins | 75% | SCHEDULE 13G |
| 2025-11-14 | Ian Jacobs | 25% | SCHEDULE 13G |
| 2026-06-01 | Mark N. Tompkins | 9.9% | SCHEDULE 13G |
| 2026-06-01 | Andreas Raptopoulos | 16.1% | SCHEDULE 13D |
| 2026-08-17 | Ian Jacobs | 0.7% | SCHEDULE 13G/A |
| 2026-08-18 | Ian Jacobs | 0.98% | SCHEDULE 13G/A |
Questions about who owns Matternet, Inc. (f/k/a Los Altos Ventures Corp.)
Who owns Matternet, Inc. (f/k/a Los Altos Ventures Corp.)?
On this page, 2 holders' latest ownership filings report 5% or more of Matternet, Inc. (f/k/a Los Altos Ventures Corp.): Andreas Raptopoulos (16.1%, Schedule 13D, filed 2026-06-01) and Mark N. Tompkins (9.9%, Schedule 13G, filed 2026-06-01).
Who are the largest shareholders of Matternet, Inc. (f/k/a Los Altos Ventures Corp.)?
By the share each holder's latest filing reports, the largest holders of Matternet, Inc. (f/k/a Los Altos Ventures Corp.) on this page are Andreas Raptopoulos (16.1%) and Mark N. Tompkins (9.9%).
When did Andreas Raptopoulos buy into Matternet, Inc. (f/k/a Los Altos Ventures Corp.)?
The filings give report dates, not purchase dates. The earliest filing from Andreas Raptopoulos on this page is the Schedule 13D, filed 2026-06-01, reporting 16.1%.
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%); 6 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.
Also on the record for Matternet, Inc. (f/k/a Los Altos Ventures Corp.)
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| October 7, 2026 | Leadership change filing (Form 8-K, Item 5.02) | — | Leadership changes | Source |
| September 28, 2026 | Leadership change: Andreas Raptopoulos appointed, Chief Executive Officer | — | Leadership changes | Source |
| July 30, 2026 | Leadership change: Sanjay Shah appointed, Director | — | Leadership changes | Source |
| June 15, 2026 | Leadership change filing (Form 8-K, Item 5.02) | — | Leadership changes | Source |
| June 8, 2026 | Form D, private offering | $29.64M sold | Form D page | Source |
| June 8, 2026 | Form D, private offering | — | Form D page | Source |
| May 29, 2026 | Acquired Legacy Matternet | $27.60M | Acquisition | Source |
| May 29, 2026 | Leadership change filing (Form 8-K, Item 5.02) | — | Leadership changes | Source |
Matternet, Inc. (f/k/a Los Altos Ventures Corp.): every filing and event
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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.