Franck Jean Buonanno - 11 May 2026 Form 4 Insider Report for SEALSQ Corp (LAES)

Reporting relationship: Vice-President, Global Sales
Issuer ticker: LAES
Reported as of: 11 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 11 May 2026, 16:15:10 UTC
Prior SEC filing: 01 Apr 2026
Next SEC filing: 15 May 2026
Source filing: View source filing
Reporting owner signature: /s/ John O'Hara, Attorney-in-Fact

Key filing fact

Franck Jean Buonanno filed Form 4 for SEALSQ Corp (LAES) on 11 May 2026.

Key facts

This page summarizes Franck Jean Buonanno's Form 4 filing for SEALSQ Corp (LAES).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 11 May 2026, 16:15.

Change

Previous filing in this sequence was filed on 01 Apr 2026.
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 0002115431 Primary reporting owner

Buonanno Franck Jean

Relationship: Vice-President, Global Sales
Address: C/O SEALSQ CORP, AVENUE LOUIS-CASAI 58, COINTRIN, SWITZERLAND
Signature: /s/ John O'Hara, Attorney-in-Fact
Signature date: 11 May 2026

Reported non-derivative transactions

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

LAES transaction

Ordinary Shares

Options Exercise

Transaction value
Shares: +20,000
Change %: +200%
Price: $0.0100^*
Shares after: 30,000
Date: 11 May 2026
Ownership: Direct

Reported derivative securities

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

LAES transaction Derivative

Employee Stock Option Plan (right to buy)

Options Exercise

Transaction value
Shares: -20,000
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 11 May 2026
Ownership: Direct
Underlying class: Ordinary Shares
Underlying amount: 20,000
Exercise price: $0.0100
Footnotes: F1

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

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 1 footnote

Footnote F1

The option exercise reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 13, 2025.