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 under the
Securities Exchange Act of
1934
For the month of
June 2026
Commission File Number:
001-41709
SEALSQ CORP
(Exact Name of Registrant
as Specified in Charter)
N/A
(Translation of Registrant’s
name into English)
| British Virgin Islands |
|
Avenue Louis-Casaï 58
16 Cointrin, Switzerland |
|
Not Applicable |
(State or other jurisdiction of
incorporation or organization) |
|
(Address of principal executive office) |
|
(I.R.S. 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:
☒
Form 20-F ☐ Form 40-F
| Exhibit No. |
|
Description |
| 99.1 |
|
Press Release of SEALSQ Corp issued on June 2, 2026 |
| |
|
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| 99.2 |
|
Press Release of SEALSQ Corp issued on June 2, 2026 |
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.
| Date: June 4, 2026 |
SEALSQ CORP |
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|
| |
By: |
/s/ Carlos Moreira |
| |
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Name: |
Carlos Moreira |
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Title: |
Chief Executive Officer |
| |
By: |
/s/ John O’Hara |
| |
|
Name: |
John O’Hara |
| |
|
Title: |
Chief Financial Officer |
Exhibit 99.1

SEALSQ Announces Majority Investment in Wecan
Group and CHF 5 Million Strategic Commitment to Accelerate Post-Quantum AI Compliance Co-Pilot for Global Financial Institutions
Following an initial 28% equity stake acquired
one year ago, SEALSQ increases its ownership in Wecan Group to a majority position, strengthening its ability to deliver secure, AI-powered
compliance solutions and post-quantum financial infrastructure for the global financial industry
Geneva,
Switzerland, June 2, 2026 -- SEALSQ Corp (NASDAQ: LAES) (“SEALSQ” or “Company”), a company that focuses on developing
and selling Semiconductors, PKI, and Post-Quantum technology hardware and software products, today announced that it has acquired a majority
equity stake in Wecan Group, following an initial 28% investment made one year ago.
As part of this strategic
transaction, SEALSQ will invest CHF 5 million to accelerate Wecan Group’s development and support the deployment of next-generation
compliance Co-Pilote and post-quantum financial security solutions for the global financial industry. The investment has been made using
the Company’s Quantum Fund, SEALQUANTUM.com, an internal strategic investment initiative of SEALSQ using a dedicated allocation
of our cash with the goal of accelerating the development of a fully integrated Quantum Vertical Sovereign Stack through investments in
carefully selected quantum computing startups in the United States and Europe.
Wecan Group has established
itself as a trusted technology provider for leading private banks and financial institutions, with clients including Pictet, Lombard Odier,
Edmond de Rothschild, Syz and Barclays, among others. Wecan Group’s solutions are designed to help financial institutions streamline
client data management, compliance workflows and lifecycle processes in a secure and collaborative environment.
Through this majority
participation, SEALSQ and Wecan Group intend to accelerate the implementation of an AI-powered Compliance Copilot, built on a secure post-quantum
infrastructure. The platform will integrate advanced Post-Quantum Cryptography (PQC) technologies, quantum-resistant Hardware Security
Modules (HSMs), secure digital identity frameworks and blockchain-based trust mechanisms designed to protect sensitive financial and digital
asset ecosystems against future quantum computing threats.
The objective is to provide
financial institutions, wealth managers and fintech with a trusted platform capable of optimizing the processing of sensitive client information
across the entire client lifecycle, from onboarding to periodic reviews, transaction monitoring, anti-money laundering (AML) and know-your-customer
(KYC) compliance.
The initiative aims to
further support the development of:
| ● | Quantum-resistant
authentication and transaction signing for digital banking |
| ● | Trusted AI governance and explainable compliance algorithms for regulated financial institutions |
| ● | Hardware Root of Trust and secure element technologies for financial applications |
| ● | Confidential AI and encrypted data processing leveraging homomorphic encryption and secure semiconductors |
| ● | Quantum-resilient digital identity systems for institutional and retail financial ecosystems |
In addition, Wecan Group
and SEALSQ plan to cooperate closely with SEALSQ’s parent company, WISeKey International Holding Ltd (SIX: WIHN; NASDAQ: WKEY),
a global leader in cybersecurity, digital identity and IoT, to integrate the WISeID digital identity ecosystem into financial services
and digital asset platforms. This collaboration aims to provide financial institutions and cryptocurrency ecosystems with trusted, sovereign
and post-quantum secure digital identity solutions enabling secure customer authentication, compliant onboarding, digital signatures,
identity verification and trusted access management across banking, wealth management and blockchain applications.
The integration of WISeID
technologies is intended to strengthen compliance and security capabilities by enabling:
| ● | Post-quantum secure digital identity verification for financial clients |
| ● | Trusted electronic signatures and transaction authentication |
| ● | Secure identity wallets for banking and digital assets |
| ● | Sovereign identity frameworks aligned with global financial regulations |
| ● | Secure onboarding and KYC/AML identity validation |
| ● | Cross-border trusted digital identity interoperability for financial institutions and blockchain ecosystems |
| ● | Hardware-backed authentication leveraging SEALSQ secure semiconductors and WISeKey Root of Trust infrastructure |
By combining Wecan Group’s
compliance expertise, SEALSQ’s post-quantum semiconductor and cryptographic technologies, and WISeKey’s trusted digital identity
infrastructure, the partnership aims to create one of the first integrated quantum-resilient trust platforms for the global financial
and digital asset industries.
In private banking and
financial services, client and transaction data represent some of the most sensitive and strategically important information managed by
institutions. Combining post-quantum security with AI-driven optimization of compliance is increasingly becoming a critical requirement
in light of rising cybersecurity threats, the emergence of quantum computing risks, evolving regulatory expectations around algorithms
and data governance, and the accelerated institutional adoption of tokenized finance.
Carlos Moreira, CEO of
SEALSQ commented: “Our majority investment in Wecan Group represents a significant step in SEALSQ’s strategy to bring post-quantum
security to the most sensitive sectors of the global economy. Financial institutions and digital asset platforms are entering a new era
in which cybersecurity, compliance automation, digital identity and trusted AI must converge. At the same time, cryptocurrencies and blockchain
infrastructures must evolve toward quantum resilience to preserve long-term trust and security. By combining SEALSQ’s post-quantum
technologies, Wecan Group’s expertise in private banking compliance infrastructure and WISeKey’s trusted digital identity
ecosystem, we aim to deliver a secure and scalable trust platform for the financial industry and the digital asset economy worldwide.”
Vincent Pignon, Founder
and CEO of Wecan Group added: “Wecan Group was created to help financial institutions manage trust, compliance and sensitive
client information more efficiently. With SEALSQ as a majority shareholder and strategic technology partner, we are entering a new phase
of growth. This investment will allow us to accelerate the deployment of our Compliance Management Copilot and strengthen our infrastructure
with post-quantum security capabilities, providing banks and financial institutions with future-ready solutions for client lifecycle.”
The transaction reinforces
SEALSQ’s positioning at the intersection of post-quantum cybersecurity, digital identity, trusted AI, blockchain security and regulated
financial infrastructure, and supports its ambition to address the most demanding security, compliance and digital asset protection needs
of global financial institutions and the emerging tokenized economy.
About WISeKey
WISeKey International Holding Ltd (“WISeKey”,
SIX: WIHN; Nasdaq: WKEY) is a global leader in cybersecurity, digital identity, and IoT solutions platform. It operates as a Swiss-based
holding company through several operational subsidiaries, each dedicated to specific aspects of its technology portfolio. The subsidiaries
include (i) SEALSQ Corp (Nasdaq: LAES), which focuses on semiconductors, PKI, and post-quantum technology products, (ii) WISeKey SA, which
specializes in RoT and PKI solutions for secure authentication and identification in IoT, blockchain, and AI, (iii) WISeSat AG which focuses
on space technology for secure satellite communication, specifically for IoT applications, (iv) WISe.ART Corp which focuses on trusted
blockchain NFTs and operates the WISe.ART marketplace for secure NFT transactions, and (v) SEALCOIN AG which focuses on decentralized
physical internet with DePIN technology and houses the development of the SEALCOIN platform.
Each subsidiary contributes
to WISeKey’s mission of securing the internet while focusing on their respective areas of research and expertise. Their technologies
seamlessly integrate into the comprehensive WISeKey platform. WISeKey secures digital identity ecosystems for individuals and objects
using blockchain, AI, and IoT technologies. With over 1.6 billion microchips deployed across various IoT sectors, WISeKey plays a vital
role in securing the Internet of Everything. Trusted by the OISTE/WISeKey cryptographic Root of Trust, WISeKey provides secure authentication
and identification for IoT, blockchain, and AI applications. The WISeKey Root of Trust ensures the integrity of online transactions between
objects and people. For more information on WISeKey’s strategic direction and its subsidiary companies, please visit www.wisekey.com.
About SEALSQ:
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.
About Wecan Group
Wecan Group is a Swiss technology company founded in 2015 by Dr. Vincent
Pignon, with a mission to help financial institutions securely optimize the management of their compliance processes. Its platform is
a solution for orchestrating onboarding, change-of-circumstance and periodic-review processes for the end clients of regulated institutions—whether
individuals, companies, trusts or others. Through a secure and standardized data-exchange protocol, Wecan Group has supported more than
100 financial institutions across over five countries, including some of the world’s most prestigious private banks such as Pictet,
Lombard Odier, Edmond de Rothschild, Syz and Barclays, as well as financial intermediaries and fintech. The company offers products designed
to onboard clients digitally, manage KYC and AML analysis, account openings, contract generation and periodic reviews, all while ensuring
regulatory compliance with full auditability.
For more information,
please visit www.wecangroup.ch.
Forward-Looking Statements
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 |
|
SEALSQ Investor Relations (US) |
| Carlos Moreira |
|
The Equity Group Inc. |
| Chairman & CEO |
|
Lena Cati |
| Tel: +41 22 594 3000 |
|
Tel: +1 212 836-9611 |
| info@sealsq.com |
|
Lena.cati@theequitygroup.com |
Exhibit 99.2

SEALSQ Acquires Miraex SA, Cementing Its Quantum
Sovereign Vertical Stack and Quantum Orbital Space Cloud (QOSC)
Strategic acquisition of Swiss photonics
pioneer closes the quantum interconnect layer, uniting post-quantum silicon, orbital infrastructure, and distributed quantum sensing under
one fully sovereign, end-to-end quantum architecture.
GENEVA, SWITZERLAND — June 2, 2026 —
SEALSQ Corp (NASDAQ: LAES) (“SEALSQ” or the “Company”), a subsidiary of WISeKey International Holding Ltd (NASDAQ:
WKEY; SIX: WIHN) and a global leader in post-quantum semiconductor and cybersecurity solutions, today announced the acquisition of 100%
of Miraex SA (“Miraex”), a developer of photonics-based quantum interconnect solutions headquartered at the EPFL Innovation
Park in Ecublens, Switzerland.
As part of this strategic transaction, SEALSQ
has acquired entire issued share capital of Miraex SA. The investment has been made using the Company’s Quantum Fund, SEALQUANTUM.com,
an internal strategic investment initiative of SEALSQ using a dedicated allocation of our cash with the goal of accelerating the development
of a fully integrated Quantum Vertical Sovereign Stack. The Quantum Fund has total approved capital resources of $200 million, of which
over $65 million has already been deployed in several projects (including Miraex).

This milestone marks a defining step in the evolution
of SEALSQ’s Quantum Sovereign Vertical Stack, the Company’s Root-to-Qubit architecture encompassing the full spectrum of quantum technology
from quantum-resistant semiconductors to orbital space infrastructure. It also represents a pivotal acceleration of the Quantum Orbital
Space Cloud (QOSC) program, SEALSQ’s flagship initiative to deploy quantum-secure infrastructure across Low Earth Orbit (LEO) and beyond.
THE MISSING LINK: COMPLETING THE QUANTUM SOVEREIGN VERTICAL STACK
Miraex’s acquisition closes the quantum interconnect
layer of SEALSQ’s Quantum Sovereign Vertical Stack, the critical bridge between quantum computing hardware and quantum communication networks.
Built around a proprietary Thin Film Lithium Tantalate (TFLT) Photonic Integrated Circuit (PIC) platform, Miraex’s technology enables
the conversion of quantum information between microwave frequencies (the operating domain of superconducting and semiconductor spin based
quantum processors) and optical frequencies (the medium of choice for quantum communication), a foundational capability without which
distributed quantum architectures cannot function at scale.
Miraex’s capabilities are organized across three
quantum verticals that are expected to seamlessly extend SEALSQ’s existing platform:
| ● | Distributed Quantum Computing (DQC) — aimed at enabling interconnection of distributed quantum processors to achieve scalable,
collective quantum computational power beyond the limits of any single device. |
| ● | Quantum Sensing — designed to deliver photonic entanglement-based distributed sensing for precision navigation, geophysics,
defense, and critical infrastructure monitoring. |
| ● | Quantum Networking — building globally entangled quantum networks as the backbone of the future quantum internet, enabling end-to-end
Quantum Key Distribution (QKD) at planetary scale. |
REINFORCING THE QUANTUM ORBITAL SPACE CLOUD (QOSC)
Miraex’s photonic technology is uniquely aligned
with the demands of space-based quantum infrastructure. TFLT PICs are compact, power-efficient, and radiation-tolerant by design —
attributes critical for deployment on nanosatellites, CubeSats, and the broader QOSC constellation. With this acquisition finalized, SEALSQ
now commands every layer of the quantum stack required to deliver secure, space-grade quantum connectivity:
| ● | Space-Grade Photonic Integration: Miraex’s TFLT PICs meet the size, weight, power, and radiation-tolerance
requirements for orbital deployment, enabling quantum-secure links between QOSC satellites and terrestrial endpoints. |
| ● | Quantum Key Distribution (QKD) at Scale: Miraex’s transduction and entanglement generation capabilities
provide the physical-layer substrate for satellite-based QKD, delivering information-theoretically secure communications immune to quantum
adversaries. |
| ● | Distributed Orbital Sensing: Quantum sensing payloads enabled by Miraex’s platform will extend QOSC’s
utility to precision Earth observation, sovereign navigation, and early-warning infrastructure. |
THE SEALQuantum.com
INNOVATION LAB AND QUANTUM FUND PORTFOLIO
The Miraex acquisition is the latest transaction
in a series of strategic investments and acquisitions executed through the SEALSQ Quantum Fund and the SEALQuantum.com Innovation Lab,
an internal strategic investment initiative of SEALSQ using a dedicated allocation of our cash. Together, these assets form a uniquely
cohesive and vertically integrated Quantum Sovereign Stack spanning semiconductors, quantum hardware, orbital infrastructure, and regulatory
technology:
| Entity |
|
Type |
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Strategic Role in Quantum Sovereign Vertical Stack |
| |
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|
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| Miraex SA |
|
Full Acquisition |
|
Photonics-based quantum interconnects (TFLT PIC platform); microwave-to-optical transduction; QKD substrate; quantum sensing. Closes the quantum interconnect layer of the Sovereign Stack and anchors the QOSC. |
| |
|
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| IC’ALPS |
|
Full Acquisition |
|
France’s leading ASIC design and supply-chain specialist; 100+ engineers; custom semiconductors for medtech, automotive, space, and defense — now embedding SEALSQ’s post-quantum cryptography into high-reliability silicon. |
| |
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| EeroQ |
|
Strategic Investment |
|
U.S. quantum computing pioneer using single electrons on superfluid helium; CMOS-compatible qubits aligned with SEALSQ’s semiconductor personalization processes. Anchors the ‘Quantum Made in USA’ strategy. |
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| ColibriTD |
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Strategic Investment |
|
Quantum computing solver platform connecting to EeroQ hardware; co-developing quantum optimization to raise sub-7nm wafer yields from ~50% to ~80%, targeting $30M in semiconductor manufacturing savings. |
| |
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| WISeSat.Space |
|
Strategic Investment |
|
LEO satellite constellation for global IoT connectivity; embedding SEALSQ post-quantum secure elements for space-hardened QKD and quantum-resilient satellite communications. SpaceX-launched satellites operational. |
| |
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| Quantix Edge Security |
|
Joint Venture |
|
Spain’s first post-quantum semiconductor design, personalization, and test center (Murcia); €40M budget including €19.6M from the Spanish Government (SETT). Targets €25M revenue; bolsters EU semiconductor sovereignty. |
| |
|
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| WeCan Group SA |
|
Majority Acquisition |
|
Swiss blockchain infrastructure for KYC/KYB regulatory compliance; 100+ financial institution clients. Extends SEALSQ’s post-quantum digital identity into regulated financial services and Web3. |
Taken together, these assets constitute an unparalleled
end-to-end quantum value chain — from chip-level post-quantum cryptography and ASIC design, through quantum processor hardware,
quantum interconnects, satellite infrastructure, industrial optimization, and sovereign regulatory compliance — all unified under
a single strategic architecture accessible through SEALQuantum.com.
Carlos Moreira, Chairman & CEO, SEALSQ Corp
noted, “Today’s closing of the Miraex acquisition marks a watershed moment for SEALSQ and for the broader quantum ecosystem. We have
spent years assembling the assets required to deliver a truly sovereign, end-to-end quantum architecture, one that begins at the silicon
level with our post-quantum chips and ASICs, extends through quantum processor hardware, passes through Miraex’s photonic interconnect
layer, and ultimately reaches orbit through our Quantum Orbital Space Cloud. With Miraex now fully integrated, the Quantum Sovereign Vertical
Stack is complete. The quantum internet is no longer a theoretical construct, for SEALSQ, it is a buildable, deployable roadmap that we
can now begin to execute with customers, partners, and governments. We are grateful to the Miraex team for their vision and their extraordinary
technical contributions, and we are proud to welcome them into the SEALSQ family as we focus on converting this unique strategic position
into long-term value for our shareholders.”
Daniel Brau, CEO & Co-Founder, Miraex SA added,
“Joining SEALSQ is the natural next step for Miraex. We built our TFLT PIC platform to be the connective tissue of the quantum ecosystem
— linking quantum processors, sensors, and networks into one coherent infrastructure. SEALSQ brings the global semiconductor reach,
the satellite infrastructure, and the post-quantum cryptography expertise to take that vision to planetary scale. We are proud that our
technology will now form the quantum interconnect backbone of the QOSC constellation and of SEALSQ’s Quantum Sovereign Vertical Stack.
The era of distributed, space-secured quantum computing begins today.”
About Miraex SA
Miraex is a deep-tech photonics company based
at the EPFL Innovation Park in Ecublens, Switzerland, specializing in Thin Film Lithium Tantalate (TFLT) Photonic Integrated Circuits
(PICs). Miraex’s technology enables quantum interconnectivity and entanglement across distributed quantum computing, quantum sensing,
and global quantum networking applications. The company holds a proprietary patent portfolio covering electro-optical transduction and
traveling wave transducer designs, and is an award-winning member of the Swiss National Startup Team. For more information, visit www.miraex.com.
About SEALSQ:
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-Looking Statements
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
Carlos Moreira
Chairman & CEO
Tel: +41 22 594 3000
info@sealsq.com |
|
SEALSQ Investor Relations (US)
The Equity Group Inc.
Lena Cati
Tel: +1 212 836-9611
Lena.cati@theequitygroup.com |