SEALSQ VP reports initial share and option holdings

SEALSQ Corp vice president Franck Jean Buonanno has reported his initial equity position in the company.

Rhea-AI Filing Summary

SEALSQ Corp vice president Franck Jean Buonanno has reported his initial equity position in the company. He directly holds 5,000 ordinary shares. In addition, he holds employee stock options over 35,000 ordinary shares, exercisable at $0.01 per share and expiring on April 30, 2032.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Buonanno Franck Jean

Role Vice-President, Global Sales

Type	Security	Shares	Price	Value
holding	Employee Stock Option Plan (right to buy)	--	--	--
holding	Ordinary Shares	--	--	--

Holdings After Transaction: Employee Stock Option Plan (right to buy) — 35,000 contracts (Direct); Ordinary Shares — 5,000 shares (Direct)

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does SEALSQ (LAES) executive Franck Jean Buonanno report on this Form 3?

Franck Jean Buonanno reports his initial ownership in SEALSQ. He discloses direct holdings of 5,000 ordinary shares and employee stock options over 35,000 ordinary shares, giving investors a clear view of his current equity-based stake as an executive.

How many SEALSQ (LAES) ordinary shares does Franck Jean Buonanno hold directly?

He holds 5,000 ordinary shares directly. This position represents his current direct share ownership, separate from any options, and establishes a baseline for tracking future changes in his direct equity exposure to SEALSQ over time.

What stock options does SEALSQ (LAES) executive Franck Jean Buonanno hold?

He holds employee stock options over 35,000 ordinary shares. These options are exercisable at an exercise price of $0.01 per share and are scheduled to expire on April 30, 2032, aligning his incentives with SEALSQ’s long-term performance.

Is there any buy or sell transaction reported for SEALSQ (LAES) in this Form 3?

No buy or sell transactions are reported. The Form 3 functions as an initial statement of beneficial ownership, listing existing ordinary share and stock option positions rather than documenting new market purchases or sales of SEALSQ securities.

What role does Franck Jean Buonanno hold at SEALSQ (LAES)?

He serves as Vice-President, Global Sales at SEALSQ. This senior commercial role means his reported share and option holdings reflect the equity-based incentives of a key operating executive responsible for driving global sales performance at the company.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 03/18/2026 - 09:14 AM EDT Learn about SEC filing dates

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Buonanno Franck Jean

(Last) (First) (Middle)

C/O SEALSQ CORP

AVENUE LOUIS-CASAI 58

(Street)

COINTRIN 1216

(City) (State) (Zip)

SWITZERLAND

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

3. Issuer Name and Ticker or Trading Symbol
SEALSQ Corp [ LAES ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Vice-President, Global Sales

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Ordinary Shares	5,000	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Employee Stock Option Plan (right to buy)	02/20/2026	04/30/2032	Ordinary Shares	35,000	$0.01	D

Explanation of Responses:

	/s/ John O'Hara, Attorney-in-Fact	03/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)