SEALSQ (NASDAQ: LAES) adds WeCan and Miraex to build post-quantum stack

Rhea-AI Filing Summary

SEALSQ Corp reported two strategic acquisitions aimed at strengthening its post-quantum security offerings and completing the quantum interconnect layer of its Quantum Sovereign Vertical Stack. The company acquired a majority equity stake in Swiss firm WeCan Group, which provides compliance and client data management solutions to private banks, and committed a CHF 5 million investment to accelerate WeCan’s development and next-generation post-quantum financial security infrastructure.

SEALSQ also completed the acquisition of 100% of the share capital of Miraex SA, a photonics-based quantum interconnect developer. Miraex technology is intended to provide the link between quantum computing hardware and quantum communication networks, enabling secure, space-grade quantum connectivity for SEALSQ’s Quantum Orbital Space Cloud program. The information in this report is incorporated by reference into the company’s existing Form F-3 and Form S-8 registration statements.

Insights

Tech and semiconductor M&A analyst

SEALSQ adds two niche targets to build a full post-quantum stack.

SEALSQ is using targeted M&A to assemble its Quantum Sovereign Vertical Stack. The majority stake in WeCan extends reach into bank compliance and client data, while Miraex supplies photonics-based quantum interconnects that connect quantum hardware with communication networks.

The disclosed CHF 5 million WeCan investment is modest in absolute terms but focused on developing post-quantum financial security tools. Integration risk is explicit: SEALSQ highlights challenges in combining WeCan and Miraex, market acceptance of post-quantum technologies, and competitive cybersecurity and semiconductor conditions.

The report also folds these developments into existing Form F-3 and Form S-8 registration statements, which may support future capital raising or equity compensation tied to this strategy. Actual impact will depend on successful integration and customer adoption in financial institutions and quantum connectivity markets.

Key Figures

WeCan investment: CHF 5 million Miraex ownership acquired: 100% of issued share capital Announcement date: June 2, 2026

3 metrics

WeCan investment CHF 5 million Planned investment to accelerate WeCan development and post-quantum financial security infrastructure

Miraex ownership acquired 100% of issued share capital Miraex SA acquisition to provide photonics-based quantum interconnect solutions

Announcement date June 2, 2026 Date SEALSQ announced the two strategic acquisitions

Key Terms

post-quantum security, Quantum Sovereign Vertical Stack, Quantum Orbital Space Cloud, forward-looking statements, +2 more

6 terms

post-quantum security technical

"to advance the Company’s post-quantum security capabilities and complete the quantum interconnect layer"

Post-quantum security is the set of methods and standards designed to protect digital information from powerful future computers that use quantum physics. Think of it as upgrading a lock to one that cannot be picked by a new kind of super-advanced burglar; for investors, it matters because failing to adopt these protections can lead to data breaches, regulatory fines, costly system overhauls, and loss of customer trust that can hurt a company’s value.

Quantum Sovereign Vertical Stack technical

"complete the quantum interconnect layer of its Quantum Sovereign Vertical Stack"

Quantum Orbital Space Cloud technical

"deliver secure, space-grade quantum connectivity for its Quantum Orbital Space Cloud (“QOSC”) program"

forward-looking statements regulatory

"This report contains forward-looking statements within the meaning of the Securities Act of 1933"

Forward-looking statements are predictions or plans that companies share about what they expect to happen in the future, like estimating sales or profits. They matter because they help investors understand a company's outlook, but since they are based on guesses and assumptions, they can sometimes be wrong.

registration statement on Form F-3 regulatory

"incorporated by reference into the registration statement on Form F-3 of the Company"

A registration statement on Form F-3 is a streamlined filing used by eligible foreign companies to register securities for sale in the U.S., often as a “shelf” that lets them offer shares quickly when market conditions are right. For investors it matters because it signals that the company can raise capital on short notice—potentially increasing liquidity but also the risk of share dilution if new stock is issued—similar to a company keeping a pre-approved credit line ready to use.

registration statement on Form S-8 regulatory

"and the registration statement on Form S-8 of the Company"

A registration statement on Form S-8 is the U.S. Securities and Exchange Commission filing companies use to register shares they intend to grant to employees, directors, consultants or benefit plans under stock compensation programs. It matters to investors because it signals potential issuance of new shares tied to pay and incentives, which can increase the total shares outstanding — like adding more slices to a pie — reducing each existing share’s ownership and potentially affecting earnings per share and stock value.

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Form 6-K: How Foreign Companies Report to the SEC →

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 1216 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

On June 2, 2026, SEALSQ Corp (NASDAQ: LAES) (the “Company” or “SEALSQ”) announced two strategic acquisitions to advance the Company’s post-quantum security capabilities and complete the quantum interconnect layer of its Quantum Sovereign Vertical Stack.

WeCan

SEALSQ announced that it has acquired a majority equity stake in WeCan Group (“WeCan”), a Swiss technology company that provides compliance and client data management solutions to leading private banks and financial institutions. This follows an initial 28% equity stake acquired one year ago. As part of the transaction, SEALSQ will invest CHF 5 million to accelerate WeCan’s development and support the deployment of next-generation compliance solutions and post-quantum financial security infrastructure for the global financial industry.

Miraex

The Company announced the completion of its acquisition of 100% of the issued share capital of Miraex SA (“Miraex”), a developer of photonics-based quantum interconnect solutions headquartered at the EPFL Innovation Park in Ecublens, Switzerland.

The acquisition completes the quantum interconnect layer of the Company’s Quantum Sovereign Vertical Stack, providing the critical link between quantum computing hardware and quantum communication networks. As a result, the Company can deliver secure, space-grade quantum connectivity for its Quantum Orbital Space Cloud (“QOSC”) program.

This report contains forward-looking statements within the meaning of the Securities Act of 1933, as amended, and the Securities Exchange Act of 1934, as amended. Statements that are not statements of historical fact, including statements regarding the Company’s plans, objectives, expectations, intentions, and beliefs, may be identified by words such as “intend,” “accelerate,” “aim,” “designed to,” “plan,” “will,” and similar expressions. Forward-looking statements in this report include, but are not limited to, statements regarding Company’s business strategy, the expected benefits of the Miraex acquisition, the anticipated capabilities of Miraex’s technology, the Company’s Quantum Sovereign Vertical Stack and QOSC program, the anticipated benefits of SEALSQ’s majority investment in WeCan, the planned investment of CHF 5 million and the expected use of proceeds, and any other statements that are not historical facts. These statements are based on management’s current expectations and are subject to risks and uncertainties that could cause actual results to differ materially from those expressed or implied, including the Company’s ability to successfully integrate Miraex and realize anticipated synergies; the Company’s ability to successfully integrate WeCan’s operations; the ability to realize the anticipated benefits of the WeCan investment; the development and market acceptance of post-quantum security technologies; changes in regulatory requirements affecting financial institutions; competition in the cybersecurity, compliance technology, and digital identity markets; market demand and semiconductor industry conditions; the Company’s ability to continue beneficial transactions with material parties, including a limited number of significant customers; and the risks discussed in the Company’s filings with the U.S. Securities and Exchange Commission. The Company does not undertake any obligation to update any forward-looking statements contained herein as a result of new information, future events, or otherwise.

The information contained in this Report on Form 6-K is hereby incorporated by reference into the registration statement on Form F-3 of the Company (File No. 333-290963), as amended, 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, as amended.

1

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

2

FAQ

What acquisitions did SEALSQ (LAES) announce in June 2026?

SEALSQ announced a majority equity acquisition of Swiss compliance-technology firm WeCan Group and the completed purchase of 100% of Miraex SA, a photonics-based quantum interconnect developer. Both targets support SEALSQ’s Quantum Sovereign Vertical Stack and post-quantum security strategy, especially in finance and quantum communications.

How much is SEALSQ investing in WeCan Group?

SEALSQ plans to invest CHF 5 million in WeCan Group. The funding is earmarked to accelerate development of WeCan’s compliance solutions and help build post-quantum financial security infrastructure for global financial institutions, enhancing SEALSQ’s presence in banking-focused security and data management markets.

What does the Miraex acquisition provide to SEALSQ (LAES)?

Miraex brings photonics-based quantum interconnect solutions that link quantum computing hardware to quantum communication networks. SEALSQ states this completes the quantum interconnect layer of its Quantum Sovereign Vertical Stack and supports secure, space-grade quantum connectivity for its Quantum Orbital Space Cloud program.

How do these deals support SEALSQ’s post-quantum security strategy?

WeCan strengthens SEALSQ’s position in compliance and client data management for private banks, while Miraex supplies quantum interconnect technology. Together, they aim to complete SEALSQ’s Quantum Sovereign Vertical Stack and advance post-quantum security and connectivity capabilities across financial and quantum communication markets.

How are these SEALSQ acquisitions linked to existing SEC registrations?

The information in this report is incorporated by reference into SEALSQ’s Form F-3 and Form S-8 registration statements, including their base prospectuses and related supplements. This linkage allows the disclosed developments to be part of the information package underlying those previously filed registrations.