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

Rhea-AI Filing Summary

SEALSQ Corp vice president Jean-Pierre Enguent reported option-related trades in Ordinary Shares. On June 1, 2026, he exercised options to acquire 15,000 Ordinary Shares at $0.01 per share and also received a grant of 60,000 stock options with the same exercise price, expiring on April 30, 2032.

On June 3, 2026, he sold 15,000 Ordinary Shares in an open-market transaction at a weighted average price of $3.5101 per share, in multiple trades between $3.44 and $3.66. Both the sale and the option exercise were carried out under a pre-arranged Rule 10b5-1 trading plan adopted on October 13, 2025, and he reported no Ordinary Shares held directly after these transactions.

Insights

Insider trading analyst

Routine option exercise-and-sell plus new option grant under a 10b5-1 plan.

The filing shows Jean-Pierre Enguent, a vice president at SEALSQ Corp, exercising options to acquire 15,000 Ordinary Shares at $0.01 per share, then selling the same 15,000 shares at a weighted average of $3.5101. This is a classic exercise-and-sell pattern converting option value into cash.

He also received 60,000 new Employee Stock Option Plan rights at a $0.01 exercise price, expiring on April 30, 2032, which maintains his equity-linked exposure. Both the sale and exercise were executed under a Rule 10b5-1 plan adopted on October 13, 2025, indicating the timing was pre-scheduled rather than opportunistic.

Because the transactions are compensation-related and conducted under a trading plan, they typically carry limited signaling value about management’s view of SEALSQ Corp stock. Subsequent filings may provide additional context on his remaining option and share holdings.

Insider Trade Summary 10b5-1

Net Seller: 15,000 shares ($52,652)

Net Sell 4 txns

Insider Enguent Jean-Pierre

Role Vice President, R&DSS

Sold 15,000 shs ($53K)

Type	Security	Shares	Price	Value
Sale	Ordinary Shares	15,000	$3.5101	$53K
Grant/Award	Employee Stock Option Plan (right to buy)	60,000	$0.00	--
Exercise	Employee Stock Option Plan (right to buy)	15,000	$0.00	--
Exercise	Ordinary Shares	15,000	$0.01	$150.00

Holdings After Transaction: Ordinary Shares — 0 shares (Direct, null); Employee Stock Option Plan (right to buy) — 60,000 shares (Direct, null)

Footnotes (1)

1. The 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.44 to $3.66, 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. The options 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.

Key Figures

Shares sold: 15,000 shares Sale price (weighted average): $3.5101 per share Options exercised: 15,000 shares +5 more

8 metrics

Shares sold 15,000 shares Ordinary Shares sold on June 3, 2026

Sale price (weighted average) $3.5101 per share Open-market sale range $3.44–$3.66

Options exercised 15,000 shares Ordinary Shares acquired via option exercise on June 1, 2026

Option exercise price $0.01 per share Employee Stock Option Plan rights

New options granted 60,000 options Employee Stock Option Plan grant on June 1, 2026

Option expiration April 30, 2032 Expiration date for granted options

Shares held after sale 0 shares Direct Ordinary Share holdings following June 3, 2026 sale

10b5-1 plan adoption date October 13, 2025 Covers both sale and option exercise

Key Terms

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

5 terms

Rule 10b5-1 trading plan regulatory

"The sales reported in this Form 4 were 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.

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.

Employee Stock Option Plan (right to buy) financial

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

derivative security financial

"transaction_code_description: 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.

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.

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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)
06/01/2026

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	06/01/2026		M		15,000	A	$0.01	15,000	D
Ordinary Shares	06/03/2026(1)		S		15,000	D	$3.5101(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	06/01/2026		A		60,000		06/01/2026	04/30/2032	Ordinary Shares	60,000	$0	60,000	D
Employee Stock Option Plan (right to buy)	$0.01	06/01/2026(3)		M			15,000	06/01/2026	04/30/2032	Ordinary Shares	15,000	$0	45,000	D

Explanation of Responses:

1. The 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 $3.44 to $3.66, 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.

3. The options 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	06/03/2026
	** 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 Corp (LAES) report for Jean-Pierre Enguent?

SEALSQ Corp reported that vice president Jean-Pierre Enguent exercised and sold 15,000 Ordinary Shares. He exercised stock options at $0.01 per share, then sold 15,000 shares at a weighted average of $3.5101 per share in open-market trades.

At what price did SEALSQ Corp (LAES) insider shares sell in the latest Form 4?

The reported sale averaged $3.5101 per SEALSQ Corp Ordinary Share. Footnotes explain this is a weighted average, with multiple trades executed between $3.44 and $3.66 per share, all as part of the same disclosed transaction sequence.

Were SEALSQ Corp (LAES) insider trades made under a Rule 10b5-1 plan?

Yes. Both the sale and option exercise were executed under a Rule 10b5-1 trading plan. The plan was adopted on October 13, 2025, indicating these trades were pre-arranged rather than timed discretionarily around short-term market movements.

What new stock options did SEALSQ Corp (LAES) grant to Jean-Pierre Enguent?

He received 60,000 Employee Stock Option Plan rights to buy Ordinary Shares. These options have an exercise price of $0.01 per share, became exercisable on June 1, 2026, and carry an expiration date of April 30, 2032.

How many SEALSQ Corp (LAES) shares did the insider sell in the latest filing?

Jean-Pierre Enguent sold 15,000 SEALSQ Corp Ordinary Shares. The transaction was an open-market sale at a weighted average price of $3.5101 per share, with prices ranging from $3.44 to $3.66 as disclosed.

Does the SEALSQ Corp (LAES) insider still hold Ordinary Shares after these transactions?

The Form 4 reports zero Ordinary Shares held directly after the sale. Following the 15,000-share option exercise and matching 15,000-share sale, the reported direct holding balance for Ordinary Shares is shown as 0.0000 shares.