Andreas Raptopoulos - 22 May 2026 Form 4 Insider Report for Matternet, Inc.

Reporting relationship: Chief Executive Officer, Director
Issuer ticker: N/A
Reported as of: 22 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 27 May 2026, 19:36:02 UTC
Source filing: View source filing
Reporting owner signature: /s/ Jason Benjamin Secore, Attorney-in-Fact

Key filing fact

Andreas Raptopoulos filed Form 4 for Matternet, Inc. on 27 May 2026.

Key facts

This page summarizes Andreas Raptopoulos's Form 4 filing for Matternet, Inc..
4 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 27 May 2026, 19:36.

Change

No earlier filing in this sequence is available for direct comparison.
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 0002132957 Primary reporting owner

Raptopoulos Andreas

Relationship: Chief Executive Officer, Director
Address: C/O MATTERNET, INC., 355 RAVENDALE DRIVE, MOUNTAIN VIEW
Signature: /s/ Jason Benjamin Secore, Attorney-in-Fact
Signature date: 27 May 2026

Reported non-derivative transactions

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

No ticker transaction

Common Stock

Award

Transaction value
Shares: +5,928,335
Change %
Price
Shares after: 5,928,335
Date: 22 May 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

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

No ticker transaction Derivative

Employee Stock Option (right to buy)

Award

Transaction value
Shares: +1,200,227
Change %
Price: $0.000000^*
Shares after: 1,200,227
Date: 22 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,200,227
Exercise price
Footnotes: F2, F3

No ticker transaction Derivative

Employee Stock Option (right to buy)

Award

Transaction value
Shares: +645,316
Change %
Price: $0.000000^*
Shares after: 645,316
Date: 22 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 645,316
Exercise price
Footnotes: F2, F4

No ticker transaction Derivative

Employee Stock Option (right to buy)

Award

Transaction value
Shares: +603,234
Change %
Price: $0.000000^*
Shares after: 603,234
Date: 22 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 603,234
Exercise price
Footnotes: F2, F5

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

Received in connection with the Issuer's merger (the "Merger") with Matternet, Inc. ("Legacy Matternet") in accordance with the terms of the Agreement and Plan of Merger and Reorganization dated as of May 22, 2026, by and among the Issuer (f/k/a Los Altos Ventures Corp.), Matternet Acquisition Co. and Legacy Matternet (the "Merger Agreement"), in exchange for shares of Legacy Matternet common stock. Pursuant to the terms of the Merger Agreement, at the effective time of the Merger, each issued and outstanding share of Legacy Matternet common stock was converted into the right to receive 2.0801 shares of the Issuer's common stock, rounded to the nearest whole share.

Footnote F2

Each vested and unvested option to purchase shares of common stock of Legacy Matternet outstanding immediately prior to the effective time of the Merger was assumed by the Issuer and converted into an option to purchase shares of common stock equal to the product of (a) the number of shares of common stock subject to such option immediately prior to the effective time of the Merger and (b) the Conversion Ratio, at an exercise price per share equal to (i) the exercise price per share of such option immediately prior to the effective time of the Merger divided by (ii) the Conversion Ratio.

Footnote F3

The shares subject to the option shall become vested and exercisable according to the following schedule: 25% of the shares subject to the option shall vest on the first anniversary of the vesting commencement date, and the remaining shares shall vest in equal monthly installments over the next 36 months.

Footnote F4

The shares subject to the option shall become vested and exercisable in 24 equal monthly installments from the vesting commencement date.

Footnote F5

The shares subject to the option shall become vested and exercisable in 48 equal monthly installments from the vesting commencement date.