SEALSQ CFO sells 15,582 shares under 10b5-1 plan

SEALSQ Corp Chief Financial Officer John Charles O'Hara reported selling a total of 15,582 Ordinary Shares of LAES in open-market transactions.

Rhea-AI Filing Summary

SEALSQ Corp Chief Financial Officer John Charles O'Hara reported selling a total of 15,582 Ordinary Shares of LAES in open-market transactions. He sold 10,000 shares on June 2, 2026 at a weighted average price of $3.6931 per share and 5,582 shares on June 3, 2026 at a weighted average price of $3.53 per share. The trades were made under a pre-arranged Rule 10b5-1 trading plan adopted on October 17, 2025, indicating they were scheduled in advance. Following these sales, O'Hara directly holds 250,574 Ordinary Shares of SEALSQ Corp.

Insider Trade Summary 10b5-1

Net Seller: 15,582 shares

Net Sell 2 txns

Insider O'Hara John Charles

Role Chief Financial Officer

Sold 15,582 shs ($57K)

Type	Security	Shares	Price	Value
Sale	Ordinary Shares	5,582	$3.53	$20K
Sale	Ordinary Shares	10,000	$3.6931	$37K

Holdings After Transaction: Ordinary Shares — 250,574 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 $3.56 to $3.78, 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 $3.50 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 (3) to this Form 4.

Key Figures

Total shares sold: 15,582 shares Shares sold on June 2, 2026: 10,000 shares at $3.6931 Shares sold on June 3, 2026: 5,582 shares at $3.53 +3 more

6 metrics

Total shares sold 15,582 shares Open-market sales reported in Form 4

Shares sold on June 2, 2026 10,000 shares at $3.6931 Weighted average price on June 2, 2026

Shares sold on June 3, 2026 5,582 shares at $3.53 Weighted average price on June 3, 2026

Post-transaction holdings 250,574 shares Directly held Ordinary Shares after reported sales

Price range June 2, 2026 $3.56–$3.78 Footnote weighted-average trade range

Price range June 3, 2026 $3.50–$3.66 Footnote weighted-average trade range

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 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.

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 did SEALSQ Corp (LAES) CFO John Charles O'Hara report in this Form 4?

He reported open-market sales of 15,582 SEALSQ Corp Ordinary Shares. The transactions occurred over two days in June 2026 and were executed under a pre-arranged Rule 10b5-1 trading plan adopted in October 2025, indicating scheduled, rather than discretionary, trading activity.

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

He sold 10,000 Ordinary Shares at a weighted average price of $3.6931 and 5,582 shares at $3.53. Both prices reflect weighted averages over multiple trades within price ranges detailed in the footnotes to the Form 4 filing for SEALSQ Corp.

Over what dates did the SEALSQ Corp (LAES) CFO sell his shares?

The reported sales occurred on June 2, 2026 and June 3, 2026. These two trading days together accounted for total open-market sales of 15,582 SEALSQ Corp Ordinary Shares as disclosed in the Form 4 insider transaction report.

How many SEALSQ Corp (LAES) shares does the CFO hold after these transactions?

After the reported open-market sales, John Charles O'Hara directly holds 250,574 SEALSQ Corp Ordinary Shares. This post-transaction holding figure is disclosed in the Form 4 and provides context for the relative size of the reported sales.

Were the SEALSQ Corp (LAES) CFO’s stock sales made under a Rule 10b5-1 plan?

Yes. The Form 4 states the sales were effected pursuant to a Rule 10b5-1 trading plan adopted on October 17, 2025. Such plans allow insiders to schedule trades in advance, reducing the significance of trade timing as a signal of personal outlook.

What do the weighted average prices mean in the SEALSQ Corp (LAES) Form 4?

The reported prices of $3.6931 and $3.53 per share are weighted average prices. Footnotes explain the shares were sold in multiple transactions within ranges of $3.56–$3.78 and $3.50–$3.66, with full trade-by-trade details available upon request.

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

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Accepted by SEC EDGAR 06/03/2026 - 05:15 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^*

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)
06/02/2026

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	06/02/2026(1)		S		10,000	D	$3.6931(2)	256,156	D
Ordinary Shares	06/03/2026(1)		S		5,582	D	$3.53(3)	250,574	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 $3.56 to $3.78, 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 $3.50 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 (3) to this Form 4.

	/s/ John O'Hara	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)