SEALSQ CFO sells 20,000 shares under trading plan

SEALSQ Corp Chief Financial Officer John Charles O'Hara reported selling 20,000 Ordinary Shares in two open-market transactions.

Rhea-AI Filing Summary

SEALSQ Corp Chief Financial Officer John Charles O'Hara reported selling 20,000 Ordinary Shares in two open-market transactions. He sold 10,000 shares on March 19, 2026 at a weighted average price of $3.0188 and 10,000 shares on March 20, 2026 at a weighted average price of $2.9989.

The filing states these sales were made under a pre-arranged Rule 10b5-1 trading plan adopted on October 17, 2025, which means the trades were scheduled in advance. After these transactions, O'Hara directly holds 195,183 Ordinary Shares of SEALSQ Corp.

Insider Trade Summary 10b5-1

Net Seller: 20,000 shares

Net Sell 2 txns

Insider O'Hara John Charles

Role Chief Financial Officer

Sold 20,000 shs ($60K)

Type	Security	Shares	Price	Value
Sale	Ordinary Shares	10,000	$2.9989	$30K
Sale	Ordinary Shares	10,000	$3.0188	$30K

Holdings After Transaction: Ordinary Shares — 195,183 shares (Direct)

Footnotes (3)

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 17, 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 $2.88 to $3.13, 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. F3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.92 to $3.04, 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 (3) to this Form 4.

FAQ

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

What insider transaction did SEALSQ (LAES) report in this Form 4?

SEALSQ reported that CFO John Charles O'Hara sold 20,000 Ordinary Shares in open-market transactions. The sales occurred over two days and were executed at weighted average prices around $3 per share, as detailed in the Form 4 filing.

On what dates did SEALSQ (LAES) CFO John O'Hara sell shares and at what prices?

John O'Hara sold 10,000 Ordinary Shares on March 19, 2026 at a weighted average price of $3.0188 and another 10,000 shares on March 20, 2026 at $2.9989. The filing notes these prices reflect multiple trades within narrow intraday ranges.

How many SEALSQ (LAES) shares does the CFO hold after the reported sales?

After the reported transactions, CFO John O'Hara directly holds 195,183 Ordinary Shares of SEALSQ Corp. This post-transaction balance, disclosed in the Form 4, shows he retains a substantial remaining equity stake in the company following the 20,000-share sale.

Were SEALSQ (LAES) CFO John O'Hara's share sales made under a Rule 10b5-1 plan?

Yes. The Form 4 states the sales were effected under a Rule 10b5-1 trading plan adopted by John O'Hara on October 17, 2025. Such plans pre-schedule trades, indicating these dispositions were arranged in advance rather than timed opportunistically.

What price ranges are disclosed for the SEALSQ (LAES) CFO’s share sales?

For March 19, 2026, sales occurred at prices ranging from $2.92 to $3.04, with a weighted average of $3.0188. For March 20, 2026, trades ranged from $2.88 to $3.13, with a weighted average of $2.9989, according to the Form 4 footnotes.

What type of insider is involved in this SEALSQ (LAES) Form 4 filing?

The insider is John Charles O'Hara, who serves as Chief Financial Officer and a director of SEALSQ Corp. His role as both an executive officer and board member makes his equity transactions particularly relevant for those tracking insider trading activity.

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

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Accepted by SEC EDGAR 03/23/2026 - 08:53 AM 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^*

O'Hara John Charles

(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)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/19/2026

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	03/19/2026		S(1)		10,000	D	$3.0188(2)	205,183	D
Ordinary Shares	03/20/2026		S(1)		10,000	D	$2.9989(3)	195,183	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 17, 2025.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.88 to $3.13, 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 price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.92 to $3.04, 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 (3) to this Form 4.

	/s/ John O'Hara	03/23/2026
	** 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)