SEALSQ CFO sells 143 shares in 10b5-1 trade

SEALSQ Corp Chief Financial Officer John Charles O'Hara sold 143 Ordinary Shares of LAES in an open-market transaction on June 5, 2026 at a weighted average price of $3.51 per share under a Rule 10b5-1 trading plan adopted on October 17, 2025.

Rhea-AI Filing Summary

SEALSQ Corp Chief Financial Officer John Charles O'Hara sold 143 Ordinary Shares of LAES in an open-market transaction on June 5, 2026 at a weighted average price of $3.51 per share under a Rule 10b5-1 trading plan adopted on October 17, 2025.

Following this sale, he directly owns 250,431 Ordinary Shares.

Insider Trade Summary 10b5-1

Net Seller: 143 shares

Net Sell 1 txn

Insider O'Hara John Charles

Role Chief Financial Officer

Sold 143 shs ($501.93)

Type	Security	Shares	Price	Value
Sale	Ordinary Shares	143	$3.51	$501.93

Holdings After Transaction: Ordinary Shares — 250,431 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 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 $3.50 to $3.54, 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: 143 Ordinary Shares Weighted average sale price: $3.51 per share Sale price range: $3.50 to $3.54 per share +1 more

4 metrics

Shares sold 143 Ordinary Shares Open-market sale on June 5, 2026

Weighted average sale price $3.51 per share Ordinary Shares sold in multiple transactions

Sale price range $3.50 to $3.54 per share Range of prices for individual sale trades

Shares owned after transaction 250,431 Ordinary Shares Direct holdings following June 5, 2026 sale

Key Terms

Rule 10b5-1 trading plan, weighted average price, open-market sale, Ordinary Shares

4 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.

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.

Ordinary Shares financial

""security_title": "Ordinary Shares""

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.

FAQ

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

What insider transaction did SEALSQ (LAES) report for CFO John Charles O'Hara?

SEALSQ reported that CFO John Charles O'Hara sold 143 Ordinary Shares of LAES in an open-market transaction. The sale occurred on June 5, 2026 at a weighted average price of $3.51 per share, as disclosed in the Form 4 filing.

How many SEALSQ (LAES) shares did the CFO sell and at what prices?

The CFO sold 143 Ordinary Shares of SEALSQ. The Form 4 states a weighted average sale price of $3.51 per share, with individual transactions executed in a price range between $3.50 and $3.54 per share, inclusive, across multiple trades.

How many SEALSQ (LAES) shares does the CFO hold after this Form 4 sale?

After the reported sale, CFO John Charles O'Hara directly holds 250,431 Ordinary Shares of SEALSQ. This post-transaction ownership figure is disclosed in the Form 4 as the total number of shares beneficially owned following the June 5, 2026 transaction.

Was the SEALSQ (LAES) CFO’s share sale 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 the reporting person on October 17, 2025. Such plans pre-schedule trades, helping separate routine portfolio management from discretionary timing decisions.

What does the weighted average price mean in the SEALSQ (LAES) Form 4 filing?

The weighted average price of $3.51 reflects multiple sale transactions blended into a single figure. According to the Form 4, the actual trades occurred in a range between $3.50 and $3.54 per share, and detailed trade breakdowns are available upon request.

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

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Accepted by SEC EDGAR 06/05/2026 - 05:20 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^*

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)
06/05/2026

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	06/05/2026(1)		S		143	D	$3.51(2)	250,431	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 $3.50 to $3.54, 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	06/05/2026
	** 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)