6-K - LAES - Equibles

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 6-K

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16 underthe

Securities Exchange Act of 1934

For the month of April 2026

Commission File Number: 001-41709

SEALSQ CORP

(Exact Name of Registrant as Specified in Charter)

N/A

(Translation of Registrant’s name intoEnglish)

British Virgin Islands	Avenue Louis-Casaï 58 1216 Cointrin, Switzerland	Not Applicable
(State<br> or other jurisdiction of incorporation or<br><br> organization)	(Address<br> of principal executive office)	(I.R.S.<br> Employer Identification No.)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

x Form 20-F ¨ Form 40-F

This Report of Foreign Private Issuer on Form 6-K is hereby incorporated by reference into the registration statement on Form F-3ASR of the Company (File No. 333-290963) and the registration statement on Form S-8 of the Company (File No. 333-287139), and into the base prospectus and any prospectus supplement outstanding under each of the foregoing registration statements, to the extent not superseded by documents or reports subsequently filed or furnished by the Company under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934.

Exhibit
No.	Description
99.1	Press Release of SEALSQ Corp issued on April 17, 2026
99.2	Notice of 2026 Annual General Meeting of Shareholders, dated April 14, 2026
99.3	Form of Proxy Card of Annual General Meeting of Shareholders

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

SEALSQ CORP
By:	/s/ Carlos Moreira
	Name:	Carlos Moreira
	Title:	Chief Executive Officer
By:	/s/ John O’Hara
	Name:	John O’Hara
	Title:	Chief Financial Officer

Exhibit 99.1

SEALSQ AnnouncesAgenda of its 2026 Annual General Meeting of Shareholders

Geneva, Switzerland – April 17, 2026: SEALSQ Corp (“SEALSQ” or “the Company”) (NASDAQ: LAES), a company that focuses on developing and selling Semiconductors, PKI, and Post-Quantum technology hardware and software products, is pleased to announce that its 2025 Annual General Meeting (“AGM”) of Shareholders will be held on May 7, 2026, at 09:00 a.m. Eastern Standard Time. The meeting will take place in person at WeWork Office Space, Wynwood Garage, 360 NW 27th St, Miami, FL 33127.

The SEALSQ Board of Directors recommends that shareholders approve the re-election of the current seven board members (five of whom will be non-executive directors), each for a one-year term extending until the conclusion of the 2027 AGM:

1.	Ruma<br>Bose (non-executive)
2.	Cristina<br>Dolan (non-executive)
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3.	David<br>Fergusson (non-executive)
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4.	Joao<br>Carlos Creus Moreira (executive)
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5.	John<br>O’Hara (executive)
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6.	Eric<br>Pellaton (non-executive)
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7.	Peter<br>Ward (non-executive)
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The Company believes that the re-election of these board members will continue to provide strong leadership and guidance to drive the Company's future success.

At the AGM, the Board of Directors will provide shareholders with a comprehensive overview of SEALSQ’s recent financial and operational performance, including key financial metrics and strategic initiatives. Additionally, the Board of Directors will outline the outlook of the Company, discussing growth prospects, market trends, and strategic objectives to ensure sustained value creation for shareholders.

Shareholders as of April 13, 2026 (“the Record Date”) will be entitled to attend and vote either in-person at the AGM, or by giving electronic or written voting instructions to their independent voting rights representative. Further details about the AGM, including proxy materials, voting instructions and reply card, will be provided to shareholders listed in the share register as having voting rights as of the Record Date. With this card, shareholders may appoint a proxy or vote at the AGM.

AboutSEALSQ:

SEALSQ is a leading innovator in Post-Quantum Technology hardware and software solutions. Our technology seamlessly integrates Semiconductors, PKI (Public Key Infrastructure), and Provisioning Services, with a strategic emphasis on developing state-of-the-art Quantum Resistant Cryptography and Semiconductors designed to address the urgent security challenges posed by quantum computing. As quantum computers advance, traditional cryptographic methods like RSA and Elliptic Curve Cryptography (ECC) are increasingly vulnerable.

SEALSQ is pioneering the development of Post-Quantum Semiconductors that provide robust, future-proof protection for sensitive data across a wide range of applications, including Multi-Factor Authentication tokens, Smart Energy, Medical and Healthcare Systems, Defense, IT Network Infrastructure, Automotive, and Industrial Automation and Control Systems. By embedding Post-Quantum Cryptography into our semiconductor solutions, SEALSQ ensures that organizations stay protected against quantum threats. Our products are engineered to safeguard critical systems, enhancing resilience and security across diverse industries.

For more information on our Post-Quantum Semiconductors and security solutions, please visit www.sealsq.com.

Forward-LookingStatements

This communication expressly or implicitly contains certain forward-looking statements concerning SEALSQ Corp and its businesses. Forward-looking statements include statements regarding our business strategy, financial performance, results of operations, market data, events or developments that we expect or anticipate will occur in the future, as well as any other statements which are not historical facts. Although we believe that the expectations reflected in such forward-looking statements are reasonable, no assurance can be given that such expectations will prove to have been correct. These statements involve known and unknown risks and are based upon a number of assumptions and estimates which are inherently subject to significant uncertainties and contingencies, many of which are beyond our control. Actual results may differ materially from those expressed or implied by such forward-looking statements. Important factors that, in our view, could cause actual results to differ materially from those discussed in the forward-looking statements include SEALSQ's ability to continue beneficial transactions with material parties, including a limited number of significant customers; market demand and semiconductor industry conditions; and the risks discussed in SEALSQ's filings with the SEC. Risks and uncertainties are further described in reports filed by SEALSQ with the SEC.

SEALSQ Corp is providing this communication as of this date and does not undertake to update any forward-looking statements contained herein as a result of new information, future events or otherwise.

SEALSQ Corp.<br><br> Carlos Moreira<br><br> Chairman & CEO<br><br> Tel: +41 22 594 3000<br><br> [email protected]	SEALSQ Investor Relations (US)<br><br> The Equity Group Inc.<br><br> Lena Cati<br><br> Tel: +1 212 836-9611<br><br> <br>[email protected]

Exhibit 99.2

SEALSQ CORP. (“Company”)

(Incorporated in the British Virgin Islands)

Avenue Louis-Casaï58

1216 Cointrin, Switzerland

(Addressof principal executive offices)

NOTICE OF THE 2026

ANNUAL GENERAL MEETING OF SHAREHOLDERS

April 14, 2026

NOTICE IS HEREBY GIVEN THAT the annual general meeting (the “Meeting”) of the shareholders of the Company will be held on May 7, 2026, at 09:00 a.m. (Eastern Standard Time), at WeWork Office Space, Wynwood Garage, 360 NW 27th St, Miami, FL 33127. We hope you will be able to attend the Meeting.

AGENDA

At our Meeting, our shareholders will be asked:

Proposal 1: to re-elect the following seven nominees to the Company’s board of directors, each to hold office until the next annual general meeting of shareholders, or until their earlier death, resignation, or removal:

1.	Ruma Bose
2.	Cristina Dolan
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3.	David Fergusson
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4.	Joao Carlos Creus Moreira
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5.	John O’Hara
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6.	Eric Pellaton
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7.	Peter Ward
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The Company’s management knows of no business that will be presented for consideration at the Meeting other than that stated in this Notice of Annual General Meeting.

Only shareholders of record in the books of the Company at the close of business on April 13, 2026, will be entitled to attend and vote at the Meeting, or any adjournment that may take place.

A shareholder entitled to attend and vote at the Meeting is entitled to appoint a proxy to attend and vote in their place. A proxy need not be a shareholder of the Company. A form of proxy is enclosed.

Shareholders are requested to complete, date, sign, and return the enclosed proxy form to reach the Company as promptly as possible but no later than four business days before the time for holding the Meeting or adjourned Meeting at which the proxy is to be used. The giving of such proxy will not affect your right to vote in person should you decide to attend the Meeting or adjourned meeting.

Shareholders or their proxies are responsible for their own expenses for attending the Meeting, including, but not limited to, transportation and accommodation expenses.

By:	/s/ Joao Carlos Creus Moreira
Name:	Joao Carlos Creus Moreira
Title:	Chief Executive Officer

Exhibit 99.3

1UPX<br>A Proposals — The Board of Directors recommend a vote FOR all the nominees listed.<br>04A3QB<br>01 - Ruma Bose 02 - Cristina Dolan 03 - David Fergusson<br>1. Re-election of the following seven nominees to the Company’s board of directors, each to hold office until the next annual general meeting of shareholders, or until their earlier<br>death, resignation, or removal:<br>For Against Abstain For Against Abstain For Against Abstain<br>Please sign exactly as name(s) appears hereon. Joint owners should each sign. When signing as attorney, executor, administrator, corporate officer, trustee, guardian, or custodian, please give<br>full title.<br>Date (mm/dd/yyyy) — Please print date below. Signature 1 — Please keep signature within the box. Signature 2 — Please keep signature within the box.<br>B Authorized Signatures — This section must be completed for your vote to count. Please date and sign below.<br>04 - Joao Carlos Creus<br>Moreira 05 - John O’Hara 06 - Eric Pellaton<br>07 - Peter Ward<br>2026 Annual Meeting Proxy Card<br>Using a black ink pen, mark your votes with an X as shown in this example.<br>Please do not write outside the designated areas.<br>q IF VOTING BY MAIL, SIGN, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE.q<br>MMMMMMMMMMMM<br>MMMMMMMMM<br>1234 5678 9012 345<br>688219<br>000001MR A SAMPLE<br>DESIGNATION (IF ANY)<br>ADD 1<br>ADD 2<br>ADD 3<br>ADD 4<br>ADD 5<br>ADD 6<br>ENDORSEMENT_LINE______________ SACKPACK_____________<br>MMMMMMMMMMMMMMM C123456789<br>000000000.000000 ext<br>000000000.000000 ext<br>000000000.000000 ext<br>000000000.000000 ext<br>000000000.000000 ext<br>000000000.000000 ext<br>2024<br>MR A SAMPLE (THIS AREA IS SET UP TO ACCOMMODATE<br>140 CHARACTERS) MR A SAMPLE AND MR A SAMPLE AND<br>MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND<br>MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND<br>C 1234567890 J N T<br>MMMMMMM<br>Save paper, time and money!<br>Sign up for electronic delivery at<br>www.investorvote.com/LAES<br>Online<br>Go to www.investorvote.com/LAES or<br>scan the QR code — login details are<br>located in the shaded bar below.<br>You may vote online instead of mailing this card.<br>Your vote matters – here’s how to vote!<br>Votes submitted electronically must be<br>received by 11:59 p.m., EST, on<br>May 5, 2026.
Small steps make an impact.<br>Help the environment by consenting to receive electronic<br>delivery, sign up at www.envisionreports.com/LAES<br>Notice of 2026 Annual Meeting of Shareholders<br>Proxy Solicited by Board of Directors for Annual Meeting — May 7, 2026<br>Joao Carlos Creus Moreira, the Chair of the Annual General Meeting, or ____________________________ of _______________________________________, is hereby<br>authorized to represent and vote the shares of the undersigned, with all the powers which the undersigned would possess if personally present, at the Annual<br>Meeting of Shareholders of SEALSQ to be held on May 7, 2026 or at any postponement or adjournment thereof.<br>If any proxy other than the Chair is preferred, strike out the words “Joao Carlos Creus Moreira, the Chair of the Annual General Meeting” in the paragraph<br>above, and insert the name and address of the proxy desired in the space provided. A proxy need not be a shareholder of the Company.<br>Shares represented by this proxy will be voted by the stockholder. If no such directions are indicated, the Proxies will have authority to vote FOR the<br>election of the Board of Directors.<br>In their discretion, the Proxies are authorized to vote upon such other business as may properly come before the meeting.<br>Returning this completed form of proxy card will not preclude you from attending the Annual General Meeting and voting in person if you so wish.<br>SEALSQ CORP<br>C Non-Voting Items<br>q IF VOTING BY MAIL, SIGN, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE.q<br>Change of Address — Please print new address below. Comments — Please print your comments below.<br>2026 Annual Meeting Admission Ticket<br>2026 Annual Meeting of SEALSQ Corp Shareholders<br>May 7, 2026, 09:00 a.m. EST<br>WeWork Office Space, Wynwood Garage, 360 NW 27th St, Miami, FL 33127<br>Upon arrival, please present this admission ticket and photo identification at the registration desk.
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1UPX A Proposals — The Board of Directors recommend a vote FOR all the nominees listed. 04A3QB 01 - Ruma Bose 02 - Cristina Dolan 03 - David Fergusson 1. Re-election of the following seven nominees to the Company’s board of directors, each to hold office until the next annual general meeting of shareholders, or until their earlier death, resignation, or removal: For Against Abstain For Against Abstain For Against Abstain Please sign exactly as name(s) appears hereon. Joint owners should each sign. When signing as attorney, executor, administrator, corporate officer, trustee, guardian, or custodian, please give full title. Date (mm/dd/yyyy) — Please print date below. Signature 1 — Please keep signature within the box. Signature 2 — Please keep signature within the box. B Authorized Signatures — This section must be completed for your vote to count. Please date and sign below. 04 - Joao Carlos Creus Moreira 05 - John O’Hara 06 - Eric Pellaton 07 - Peter Ward 2026 Annual Meeting Proxy Card Using a black ink pen, mark your votes with an X as shown in this example. Please do not write outside the designated areas. q IF VOTING BY MAIL, SIGN, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE.q MMMMMMMMMMMM MMMMMMMMM 1234 5678 9012 345 688219 000001MR A SAMPLE DESIGNATION (IF ANY) ADD 1 ADD 2 ADD 3 ADD 4 ADD 5 ADD 6 ENDORSEMENT_LINE______________ SACKPACK_____________ MMMMMMMMMMMMMMM C123456789 000000000.000000 ext 000000000.000000 ext 000000000.000000 ext 000000000.000000 ext 000000000.000000 ext 000000000.000000 ext 2024 MR A SAMPLE (THIS AREA IS SET UP TO ACCOMMODATE 140 CHARACTERS) MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND C 1234567890 J N T MMMMMMM Save paper, time and money! Sign up for electronic delivery at www.investorvote.com/LAES Online Go to www.investorvote.com/LAES or scan the QR code — login details are located in the shaded bar below. You may vote online instead of mailing this card. Your vote matters – here’s how to vote! Votes submitted electronically must be received by 11:59 p.m., EST, on May 5, 2026.

Small steps make an impact. Help the environment by consenting to receive electronic delivery, sign up at www.envisionreports.com/LAES Notice of 2026 Annual Meeting of Shareholders Proxy Solicited by Board of Directors for Annual Meeting — May 7, 2026 Joao Carlos Creus Moreira, the Chair of the Annual General Meeting, or ____________________________ of _______________________________________, is hereby authorized to represent and vote the shares of the undersigned, with all the powers which the undersigned would possess if personally present, at the Annual Meeting of Shareholders of SEALSQ to be held on May 7, 2026 or at any postponement or adjournment thereof. If any proxy other than the Chair is preferred, strike out the words “Joao Carlos Creus Moreira, the Chair of the Annual General Meeting” in the paragraph above, and insert the name and address of the proxy desired in the space provided. A proxy need not be a shareholder of the Company. Shares represented by this proxy will be voted by the stockholder. If no such directions are indicated, the Proxies will have authority to vote FOR the election of the Board of Directors. In their discretion, the Proxies are authorized to vote upon such other business as may properly come before the meeting. Returning this completed form of proxy card will not preclude you from attending the Annual General Meeting and voting in person if you so wish. SEALSQ CORP C Non-Voting Items q IF VOTING BY MAIL, SIGN, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE.q Change of Address — Please print new address below. Comments — Please print your comments below. 2026 Annual Meeting Admission Ticket 2026 Annual Meeting of SEALSQ Corp Shareholders May 7, 2026, 09:00 a.m. EST WeWork Office Space, Wynwood Garage, 360 NW 27th St, Miami, FL 33127 Upon arrival, please present this admission ticket and photo identification at the registration desk.

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