SEALSQ VP sells 15,000 shares after option exercise

SEALSQ Corp vice president Jean-Pierre Enguent exercised and sold company stock in a pre-planned transaction.

Rhea-AI Filing Summary

SEALSQ Corp vice president Jean-Pierre Enguent exercised and sold company stock in a pre-planned transaction. On April 6, 2026, he exercised an Employee Stock Option Plan to acquire 15,000 Ordinary Shares at an exercise price of $0.01 per share. The same day, his non-derivative holdings rose to 15,000 shares. On April 8, 2026, he sold 15,000 Ordinary Shares in an open-market transaction at a weighted average price of $2.1984 per share, with individual trade prices ranging from $2.13 to $2.42. After the sale, he held no Ordinary Shares, and no remaining derivative options are shown. All transactions were executed under a Rule 10b5-1 trading plan adopted on October 13, 2025.

Insider Trade Summary 10b5-1

Exercise and sale activity reported; no spread calculated

Exercise and Sale 3 txns

Insider Enguent Jean-Pierre

Role Vice President, R&DSS

Sold 15,000 shs ($33K)

Approx. gross sale proceeds $33K

Approx. exercise cost $150.00

Type	Security	Shares	Price	Value
Sale	Ordinary Shares	15,000	$2.1984	$33K
Exercise	Employee Stock Option Plan (right to buy)	15,000	$0.00	$0.00
Exercise	Ordinary Shares	15,000	$0.01	$150.00

Holdings After Transaction: Employee Stock Option Plan (right to buy) — 15,000 contracts (Direct); Ordinary Shares — 0 shares (Direct)

Footnotes (2)

1. F1. The option exercise and subsequent sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 13, 2025.
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.13 to $2.42, inclusive. The reporting person undertakes to provide to SEALSQ Corp, any security holder of SEALSQ Corp, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (2) to this Form 4.

Key Figures

Shares sold: 15,000 shares Weighted average sale price: $2.1984 per share Sale price range: $2.13–$2.42 per share +5 more

8 metrics

Shares sold 15,000 shares Ordinary Shares sold on April 8, 2026

Weighted average sale price $2.1984 per share Open-market sale of Ordinary Shares

Sale price range $2.13–$2.42 per share Price range across multiple sale transactions

Options exercised 15,000 shares Employee Stock Option Plan exercised April 6, 2026

Option exercise price $0.01 per share Employee Stock Option Plan (right to buy)

Option expiration date April 30, 2032 Original expiration of exercised option grant

Shares held after sale 0 shares Direct Ordinary Share holdings following April 8, 2026 sale

10b5-1 plan adoption date October 13, 2025 Pre-planned trading arrangement for exercise and sale

Key Terms

Rule 10b5-1 trading plan, Employee Stock Option Plan (right to buy), derivative exercise/conversion, weighted average price, +1 more

5 terms

Rule 10b5-1 trading plan regulatory

"were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person"

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 (right to buy) financial

"security_title": "Employee Stock Option Plan (right to buy)""

derivative exercise/conversion financial

"transaction_action": "derivative exercise/conversion""

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

FAQ

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

What did SEALSQ (LAES) executive Jean-Pierre Enguent report in this Form 4?

Jean-Pierre Enguent reported exercising options for 15,000 SEALSQ Ordinary Shares at $0.01 per share, then selling all 15,000 shares in open-market transactions at a weighted average price of $2.1984 per share under a pre-established Rule 10b5-1 trading plan.

How many SEALSQ (LAES) shares did Jean-Pierre Enguent sell and at what price?

He sold 15,000 Ordinary Shares of SEALSQ at a weighted average price of $2.1984 per share. The filing notes that individual trades occurred in a price range between $2.13 and $2.42 per share, reflecting multiple executions to complete the sale.

Were Jean-Pierre Enguent’s SEALSQ (LAES) trades made under a Rule 10b5-1 plan?

Yes. The Form 4 footnotes state that the option exercise and subsequent share sales were effected pursuant to a Rule 10b5-1 trading plan adopted by Jean-Pierre Enguent on October 13, 2025, indicating the transactions were pre-planned rather than discretionary.

What options did Jean-Pierre Enguent exercise in SEALSQ (LAES) according to the filing?

He exercised an Employee Stock Option Plan covering 15,000 Ordinary Shares at an exercise price of $0.01 per share. The derivative record shows these options converted into 15,000 Ordinary Shares on April 6, 2026, with the option originally expiring on April 30, 2032.

How many SEALSQ (LAES) shares does Jean-Pierre Enguent hold after these transactions?

After selling 15,000 Ordinary Shares on April 8, 2026, the Form 4 reports that Jean-Pierre Enguent directly holds zero Ordinary Shares. The derivative summary is empty, indicating no remaining option position is shown in this particular filing after the exercise.

What is the significance of the weighted average price in Jean-Pierre Enguent’s SEALSQ (LAES) sale?

The weighted average price of $2.1984 per share summarizes multiple trades executed between $2.13 and $2.42. The footnote explains that detailed information on the number of shares sold at each price within this range is available upon request from SEALSQ, its shareholders, or regulators.

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

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Accepted by SEC EDGAR 04/09/2026 - 04:15 PM Learn about SEC filing dates

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)
04/06/2026

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	04/06/2026(1)		M		15,000	A	$0.01	15,000	D
Ordinary Shares	04/08/2026(1)		S		15,000	D	$2.1984(2)	0	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	04/06/2026(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 and subsequent sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 13, 2025.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.13 to $2.42, inclusive. The reporting person undertakes to provide to SEALSQ Corp, any security holder of SEALSQ Corp, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (2) to this Form 4.

	/s/ John O'Hara, Attorney-in-Fact	04/09/2026
	** 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)