SEALSQ CFO sells 25,250 shares in planned trades

SEALSQ Corp Chief Financial Officer John Charles O'Hara reported open-market sales of a total of 25,250 Ordinary Shares of SEALSQ over three days.

Rhea-AI Filing Summary

SEALSQ Corp Chief Financial Officer John Charles O'Hara reported open-market sales of a total of 25,250 Ordinary Shares of SEALSQ over three days. He sold 10,000 shares at a weighted average price of $3.0561 on April 22, 2026, 10,000 shares at $2.8800 on April 23, 2026, and 5,250 shares at $2.9065 on April 24, 2026.

All transactions were executed under a pre-arranged Rule 10b5-1 trading plan adopted by the reporting person. After these sales, O'Hara directly holds 280,845 Ordinary Shares, indicating he retains a substantial equity position in SEALSQ.

Insider Trade Summary 10b5-1

Net Seller: 25,250 shares

Net Sell 3 txns

Insider O'Hara John Charles

Role Chief Financial Officer

Sold 25,250 shs ($75K)

Type	Security	Shares	Price	Value
Sale	Ordinary Shares	5,250	$2.9065	$15K
Sale	Ordinary Shares	10,000	$2.88	$29K
Sale	Ordinary Shares	10,000	$3.0561	$31K

Holdings After Transaction: Ordinary Shares — 280,845 shares (Direct)

Footnotes (4)

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 $2.97 to $3.16, 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 $2.7884 to $3.02, 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.
4. F4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.8234 to $2.97, 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 (4) to this Form 4.

Key Figures

Total shares sold: 25,250 shares Sale on April 22, 2026: 10,000 shares at $3.0561 Sale on April 23, 2026: 10,000 shares at $2.8800 +3 more

6 metrics

Total shares sold 25,250 shares Net insider sales across three days

Sale on April 22, 2026 10,000 shares at $3.0561 Open-market sale of Ordinary Shares

Sale on April 23, 2026 10,000 shares at $2.8800 Open-market sale of Ordinary Shares

Sale on April 24, 2026 5,250 shares at $2.9065 Open-market sale of Ordinary Shares

Shares held after transactions 280,845 shares Direct ownership following the reported sales

Net buy/sell direction Net sale of 25,250 shares transactionSummary netBuySellShares

Key Terms

Rule 10b5-1 trading plan, weighted average price, open-market sale, Ordinary Shares, +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 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. These shares were sold in multiple transactions"

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.

Form 4 regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

FAQ

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

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

He reported selling a total of 25,250 SEALSQ Ordinary Shares in open-market transactions over three consecutive days. These trades were executed under a pre-arranged Rule 10b5-1 trading plan and are disclosed as routine insider activity.

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

The CFO sold 10,000 shares at $3.0561, 10,000 shares at $2.8800, and 5,250 shares at $2.9065. Each price is a weighted average for multiple trades within disclosed ranges during the respective trading day.

Does SEALSQ (LAES) CFO John O'Hara still hold shares after these sales?

Yes. After completing the reported transactions, he directly owns 280,845 SEALSQ Ordinary Shares. This remaining stake is much larger than the number of shares sold, indicating he continues to hold a significant equity position in the company.

Were the SEALSQ (LAES) CFO's share sales part of a Rule 10b5-1 plan?

Yes. A footnote states the sales were made under a Rule 10b5-1 trading plan adopted on October 17, 2025. Such plans pre-schedule trades, helping separate routine portfolio management from discretionary market-timing decisions by insiders.

What type of transactions did the SEALSQ (LAES) Form 4 disclose?

The Form 4 shows three non-derivative transactions, all coded "S" as open-market sales of Ordinary Shares. There were no option exercises or derivative conversions, and no gifts or tax-withholding entries in this particular filing.

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

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Accepted by SEC EDGAR 04/24/2026 - 04:59 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)
04/22/2026

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	04/22/2026(1)		S		10,000	D	$3.0561(2)	296,095	D
Ordinary Shares	04/23/2026(1)		S		10,000	D	$2.88(3)	286,095	D
Ordinary Shares	04/24/2026(1)		S		5,250	D	$2.9065(4)	280,845	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 $2.97 to $3.16, 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 $2.7884 to $3.02, 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.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.8234 to $2.97, 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 (4) to this Form 4.

	/s/ John O'Hara	04/24/2026
	** 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)