SEALSQ Corp officer sells 5,000 shares in plan

SEALSQ Corp Company Secretary Nathalie Claude Odile Verjus reported an open-market sale of 5,000 Ordinary Shares on March 18, 2026.

Rhea-AI Filing Summary

SEALSQ Corp Company Secretary Nathalie Claude Odile Verjus reported an open-market sale of 5,000 Ordinary Shares on March 18, 2026. The weighted average sale price was $3.0258 per share, with individual trades executed between $2.98 and $3.09.

The transactions were effected pursuant to a Rule 10b5-1 trading plan adopted on October 24, 2025. Following this sale, Verjus directly holds 185,000 Ordinary Shares of SEALSQ Corp.

Insider Trade Summary 10b5-1

Net Seller: 5,000 shares

Net Sell 1 txn

Insider Verjus Nathalie Claude Odile

Role Company Secretary

Sold 5,000 shs ($15K)

Type	Security	Shares	Price	Value
Sale	Ordinary Shares	5,000	$3.0258	$15K

Holdings After Transaction: Ordinary Shares — 185,000 shares (Direct)

Footnotes (2)

1. F1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 24, 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 $2.98 to $3.09, 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.

FAQ

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What insider transaction did SEALSQ Corp (LAES) report for Nathalie Verjus?

SEALSQ Corp reported that Company Secretary Nathalie Claude Odile Verjus sold 5,000 Ordinary Shares. The sale occurred on March 18, 2026 as an open-market transaction under a pre-established Rule 10b5-1 trading plan.

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

The reported weighted average sale price was $3.0258 per share. Individual trades took place in multiple transactions at prices ranging from $2.98 to $3.09 per share, as disclosed in the Form 4 footnote.

How many SEALSQ Corp (LAES) shares does Nathalie Verjus hold after the sale?

After selling 5,000 Ordinary Shares, Nathalie Claude Odile Verjus directly holds 185,000 SEALSQ Corp shares. This post-transaction ownership figure is reported in the Form 4 as total shares beneficially owned following the transaction.

Was the SEALSQ Corp (LAES) insider sale made under a Rule 10b5-1 plan?

Yes, the Form 4 states the sales were effected pursuant to a Rule 10b5-1 trading plan. The plan was adopted by the reporting person on October 24, 2025, indicating the transactions were pre-arranged rather than discretionary.

What role does the reporting person in SEALSQ Corp (LAES) Form 4 hold?

The reporting person, Nathalie Claude Odile Verjus, serves as Company Secretary at SEALSQ Corp. The Form 4 identifies her as an officer of the company and reports her direct ownership of Ordinary Shares after the sale.

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Accepted by SEC EDGAR 03/19/2026 - 04:15 PM EDT 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^*

Verjus Nathalie Claude Odile

(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)
	Company Secretary

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/18/2026

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	03/18/2026		S(1)		5,000	D	$3.0258(2)	185,000	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

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 24, 2025.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.98 to $3.09, 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	03/19/2026
	** 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)