SEALSQ plans $200M Quobly deal for WISeKey (NASDAQ: WKEY) investors

Rhea-AI Filing Summary

WISeKey International Holding Ltd, through its semiconductor and post-quantum security subsidiary SEALSQ Corp, has entered a non-binding Memorandum of Understanding for exclusive negotiations to make an initial minority investment and potentially acquire a majority stake in French quantum computing firm Quobly SAS. If completed, the contemplated multi-stage transaction would involve a total investment of approximately $200 million by SEALSQ in exchange for a majority interest in Quobly.

The potential deal is framed as part of SEALSQ’s Quantum strategy and is supported in part by its dedicated Quantum Fund, aiming to accelerate sovereign, secure, industrial-scale quantum technologies in Europe. SEALSQ and Quobly plan to expand their existing collaboration to develop secure-by-design, silicon-based quantum computing platforms with embedded quantum-resistant security for sectors such as defense, intelligence, financial services, and pharmaceuticals. The proposed transaction remains subject to definitive agreements, due diligence, corporate and regulatory approvals, and other customary closing conditions.

Insights

Technology M&A and deep tech strategist

Non-binding $200M quantum deal could be strategically important but remains early-stage.

The content describes SEALSQ Corp, a subsidiary of WISeKey, entering into a non-binding Memorandum of Understanding for exclusive negotiations to invest in and potentially acquire a majority stake in French quantum computing firm Quobly. The contemplated multi-stage transaction would involve a total investment of about $200M by SEALSQ in exchange for a majority interest, placing this in the category of potentially sizeable strategic M&A rather than a small partnership.

The proposal aligns explicitly with SEALSQ’s stated Quantum strategy and is partly backed by its dedicated Quantum Fund, which is intended to support sovereign, secure, industrial-scale quantum technologies in Europe. Strategically, combining Quobly’s silicon-based quantum processor technology with SEALSQ’s post-quantum security and Root-of-Trust capabilities is positioned as a way to create secure-by-design quantum systems for mission-critical sectors. However, all terms remain subject to negotiation, completion of financial, legal, technical and commercial due diligence, and required corporate and regulatory approvals.

Because the Memorandum of Understanding is expressly described as non-binding and the transaction is contingent on multiple customary conditions, there is no immediate change to WISeKey’s or SEALSQ’s financial position in this disclosure. Future updates, such as the signing of definitive agreements or disclosure of financing structure and ownership details, would clarify how a completed transaction at around $200M might affect capital allocation, control of Quobly, and the combined quantum-security product roadmap.

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 January 2026

Commission File Number: 001-39115

WISEKEY INTERNATIONAL HOLDING AG

(Exact Name of Registrant as Specified in Charter)

WISEKEY INTERNATIONAL HOLDING LTD

(Translation of Registrant’s name into English)

Canton of Zug, Switzerland	General-Guisan-Strasse 6 CH-6300 Zug, 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 Wisekey International Holding Ltd issued on January 14, 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:  January 14, 2026	WISEKEY INTERNATIONAL HOLDING AG
	By:	/s/ Carlos Moreira
		Name: Carlos Moreira
		Title:   Chief Executive Officer
	By:	/s/ John O’Hara
		Name: John O’Hara
		Title:   Chief Financial Officer

 

WISeKey’s Subsidiary, SEALSQ Announces Entry into a Memorandum of Understanding Regarding a Potential Strategic Investment and Acquisition of Quantum Computing Firm Quobly

Quobly is a pioneer in quantum microelectronics, developing silicon-based quantum processors using proven semiconductor manufacturing processes

Geneva, Switzerland, January 14, 2026 – Ad hoc announcement pursuant to Art. 53 LR - WISeKey International Holding Ltd (“WISeKey”) (SIX: WIHN, NASDAQ: WKEY), a leading global cybersecurity, blockchain, and IoT company, today announces that its subsidiary, SEALSQ Corp (NASDAQ: LAES) ("SEALSQ" or "Company"), a global leader in semiconductors security and Post-Quantum Cryptography (PQC) solutions, has entered into a non-binding Memorandum of Understanding leading to exclusive negotiations with the shareholders of Quobly SAS, a leading French technology company pioneering the development of silicon-based quantum computers (“QUOBLY”), to make an initial minority investment and then potentially acquire a majority stake in QUOBLY. The proposed transaction remains subject to the negotiation and execution of definitive agreements, completion of financial, legal, technical and commercial due diligence, receipt of required corporate and regulatory approvals, and the satisfaction of other customary closing conditions.

These exclusive negotiations result from the execution of a non-binding Memorandum of Understanding that contemplates a multi-stage transaction.

This transaction is anchored within SEALSQ’s Quantum strategy and supported in part by its dedicated Quantum Fund designed to accelerate the emergence of sovereign, secure, and industrial-scale quantum technologies across Europe. If completed, the transaction would result in a total investment of approximately $200M by SEALSQ in return for a majority stake in QUOBLY.

The entering into exclusive negotiations with QUOBLY follows the ongoing strategic collaboration between SEALSQ and QUOBLY, announced on November 21, 2025. The collaboration as proposed to be expanded, plans to deliver accelerated benefits, including joint leadership in trustworthy and industrialized quantum computers and enhance EU and US market expansion.

SEALSQ and QUOBLY aim to establish a reference platform for secure-by-design quantum computing to define how quantum-resistant security can be embedded directly into future quantum infrastructures serving defense, intelligence, financial services, pharmaceuticals, and other mission-critical sectors.

Maud Vinet, Co-Founder and Chief Executive Officer of QUOBLY, commented: “This proposed transaction by SEALSQ marks an important step in QUOBLY’s industrial journey. Joining forces with a global leader in post-quantum security and semiconductor expert accelerates our ability to bring secure, scalable silicon-based quantum processors to market, and to expand internationally while consolidating our technological roadmap.”

Carlos Moreira, Founder and Chief Executive Officer of WISeKey, stated: “The proposed acquisition of QUOBLY is fully aligned with our Quantum roadmap. As quantum computing becomes a strategic infrastructure, security must be embedded at the hardware level from day one. QUOBLY’s CMOS-compatible quantum technology, combined with SEALSQ’s post-quantum Root-of-Trust capabilities, creates a unique platform to build sovereign, trusted, and industrialized quantum systems for Europe, and their strategic partners.”

About Quobly:

Quobly is a pioneer in quantum microelectronics, developing silicon-based quantum chips using proven semiconductor manufacturing processes. Founded in 2022 in Grenoble, France, the company builds on over 15 years of collaborative research between world-class institutions CEA-Leti and CNRS, combining expertise in quantum physics and microelectronics. Co-founded by Maud Vinet, Ph.D. in quantum physics, author of 300+ papers and 70+ patents, and Tristan Meunier, a leading expert in semiconductor quantum engineering trained under Nobel laureate Serge Haroche, Quobly bridges science and industry to make quantum computing scalable and manufacturable.

Quobly has a strategic partnership with STMicroelectronics to accelerate the industrialization of its silicon quantum chips. In 2023, Quobly raised €19 million, a record European seed round for a quantum hardware startup, followed in 2025 by €21 million to advance its Q100T program, a key step toward fault-tolerant quantum computing.

Quobly media contacts

marie.cabrieres@quobly.io

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 house 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. The company’s semiconductors generate valuable Big Data that, when analyzed with AI, enable predictive equipment failure prevention. 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.

Disclaimer

 
This communication expressly or implicitly contains certain forward-looking statements concerning WISeKey International Holding Ltd and its business. Such statements involve certain known and unknown risks, uncertainties and other factors, which could cause the actual results, financial condition, performance or achievements of WISeKey International Holding Ltd to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. WISeKey International Holding Ltd 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.

This press release does not constitute an offer to sell, or a solicitation of an offer to buy, any securities, and it does not constitute an offering prospectus within the meaning of the Swiss Financial Services Act (“FinSA”), the FinSa's predecessor legislation or advertising within the meaning of the FinSA. Investors must rely on their own evaluation of WISeKey and its securities, including the merits and risks involved. Nothing contained herein is, or shall be relied on as, a promise or representation as to the future performance of WISeKey.

Press and Investor Contacts

WISeKey International Holding Ltd
Company Contact: Carlos Moreira
Chairman & CEO
Tel: +41 22 594 3000
info@wisekey.com  WISeKey Investor Relations (US) 
The Equity Group Inc. Lena Cati Tel: +1 212 836-9611 lcati@theequitygroup.com  

FAQ

What did WISeKey (WKEY) announce regarding SEALSQ and Quobly?

WISeKey announced that its subsidiary SEALSQ Corp has entered into a non-binding Memorandum of Understanding for exclusive negotiations to make an initial minority investment and potentially acquire a majority stake in French quantum computing firm Quobly SAS.

How large is the potential SEALSQ investment in Quobly mentioned by WISeKey (WKEY)?

If the contemplated multi-stage transaction is completed, SEALSQ would make a total investment of approximately $200 million in Quobly in return for a majority stake.

Is the SEALSQ–Quobly transaction announced by WISeKey (WKEY) already finalized?

No. The companies have signed a non-binding Memorandum of Understanding, and the proposed transaction remains subject to negotiation and execution of definitive agreements, completion of due diligence, corporate and regulatory approvals, and other customary closing conditions.

How does the proposed Quobly deal fit WISeKey (WKEY) and SEALSQ’s strategy?

The potential acquisition is described as anchored within SEALSQ’s Quantum strategy and supported in part by its dedicated Quantum Fund, aiming to accelerate sovereign, secure, industrial-scale quantum technologies in Europe and build secure-by-design quantum computing platforms.

What technology focus does Quobly bring to the WISeKey (WKEY) group if the deal proceeds?

Quobly is portrayed as a pioneer in quantum microelectronics, developing silicon-based quantum chips using proven semiconductor manufacturing processes, with the goal of making quantum computing scalable and manufacturable.

Which sectors are targeted by the SEALSQ and Quobly quantum security collaboration?

SEALSQ and Quobly aim to build a secure-by-design quantum computing platform serving defense, intelligence, financial services, pharmaceuticals, and other mission-critical sectors.