SEALSQ (LAES) VP exercises 15,000 options under Rule 10b5-1 plan

Rhea-AI Filing Summary

SEALSQ Corp Vice President, R&DSS Jean-Pierre Enguent exercised employee stock options to acquire 15,000 Ordinary Shares. On May 4, 2026, he exercised options with a conversion price of $0.01 per share under an Employee Stock Option Plan. Following the transaction, he directly holds 15,000 Ordinary Shares. The filing notes the option exercise was carried out under a Rule 10b5-1 trading plan adopted on October 13, 2025, indicating the transaction was pre-scheduled.

Insider Trade Summary 10b5-1

15,000 shares exercised/converted

Mixed 2 txns

Insider Enguent Jean-Pierre

Role Vice President, R&DSS

Type	Security	Shares	Price	Value
Exercise	Employee Stock Option Plan (right to buy)	15,000	$0.00	--
Exercise	Ordinary Shares	15,000	$0.01	$150.00

Holdings After Transaction: Employee Stock Option Plan (right to buy) — 15,000 shares (Direct, null); Ordinary Shares — 15,000 shares (Direct, null)

Footnotes (1)

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Key Figures

Options exercised: 15,000 shares Exercise price: $0.01 per share Shares held after transaction: 15,000 Ordinary Shares +3 more

6 metrics

Options exercised 15,000 shares Employee Stock Option Plan exercised on May 4, 2026

Exercise price $0.01 per share Conversion or exercise price for 15,000 options

Shares held after transaction 15,000 Ordinary Shares Direct ownership following May 4, 2026 exercise

Underlying security 15,000 Ordinary Shares Underlying shares for exercised Employee Stock Option Plan

Option expiration date April 30, 2032 Expiration date of exercised employee stock options

10b5-1 plan adoption October 13, 2025 Date Rule 10b5-1 trading plan was adopted

Key Terms

Rule 10b5-1 trading plan, Employee Stock Option Plan, derivative security, Ordinary Shares

4 terms

Rule 10b5-1 trading plan regulatory

"The option exercise reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted..."

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

Employee Stock Option Plan financial

"Employee Stock Option Plan (right to buy) linked to 15,000 Ordinary Shares..."

derivative security financial

"transaction_action is derivative exercise/conversion and transaction_code_description is Exercise or conversion of derivative security..."

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

Ordinary Shares financial

"security_title is Ordinary Shares acquired through the option exercise..."

Ordinary shares are a type of ownership stake in a company, giving shareholders a right to participate in the company’s profits and decision-making through voting. They are similar to owning a piece of a business, and their value can rise or fall based on the company's performance. Investors buy ordinary shares to potentially earn dividends and benefit from the company's growth over time.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Enguent Jean-Pierre

(Last) (First) (Middle)

C/O SEALSQ CORP

AVENUE LOUIS-CASAI 58

(Street)

COINTRIN 1216

(City) (State) (Zip)

SWITZERLAND

(Country)

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Vice President, R&DSS

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/04/2026

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

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

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

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Ordinary Shares	05/04/2026		M		15,000	A	$0.01	15,000	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Employee Stock Option Plan (right to buy)	$0.01	05/04/2026(1)		M			15,000	02/10/2026	04/30/2032	Ordinary Shares	15,000	$0	15,000	D

Explanation of Responses:

1. 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.

	/s/ John O'Hara, Attorney-in-Fact	05/04/2026
	** 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 4 (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 4: SEC 1474 (03-26)

FAQ

What insider transaction did SEALSQ (LAES) report for Jean-Pierre Enguent?

SEALSQ Vice President, R&DSS Jean-Pierre Enguent exercised employee stock options to acquire 15,000 Ordinary Shares at $0.01 per share. The transaction occurred on May 4, 2026 and was executed under an Employee Stock Option Plan pursuant to a Rule 10b5-1 trading plan.

How many SEALSQ (LAES) shares does Jean-Pierre Enguent hold after this Form 4?

After the reported transaction, Jean-Pierre Enguent directly holds 15,000 Ordinary Shares of SEALSQ. These shares were obtained through the exercise of employee stock options at a conversion price of $0.01 per share on May 4, 2026 under a pre-established Rule 10b5-1 trading plan.

What was the exercise price of the SEALSQ (LAES) options used by Jean-Pierre Enguent?

The employee stock options exercised by Jean-Pierre Enguent had a conversion or exercise price of $0.01 per share. Exercising these options on May 4, 2026 allowed him to acquire 15,000 Ordinary Shares of SEALSQ under the company’s Employee Stock Option Plan.

What type of securities did Jean-Pierre Enguent exercise in SEALSQ (LAES)?

Jean-Pierre Enguent exercised derivative securities classified as an Employee Stock Option Plan (right to buy) linked to 15,000 Ordinary Shares. This Form 4 records the option exercise as a derivative exercise or conversion, resulting in ownership of 15,000 Ordinary Shares directly in his name.

Was the SEALSQ (LAES) option exercise by Jean-Pierre Enguent under a Rule 10b5-1 plan?

Yes. The Form 4 footnote states the option exercise was effected pursuant to a Rule 10b5-1 trading plan adopted by Jean-Pierre Enguent on October 13, 2025. Such plans pre-schedule trades, indicating the timing of this May 4, 2026 exercise was predetermined rather than discretionary.

When do the SEALSQ (LAES) employee stock options exercised by Jean-Pierre Enguent expire?

The employee stock options exercised by Jean-Pierre Enguent carry an expiration date of April 30, 2032. He exercised 15,000 options on May 4, 2026 at a conversion price of $0.01 per share, converting them into 15,000 Ordinary Shares under SEALSQ’s Employee Stock Option Plan.