SEALSQ Participates as a Lead Investor in Quobly’s €130 Million Series A Financing Via SEALQuantum.com Fund to Advance the European Sovereign Quantum Infrastructure

SEALSQ (NASDAQ: LAES) became a lead investor in Quobly’s €130 million Series A, alongside ST Microelectronics, Isalt and BPI France.

Rhea-AI Summary

SEALSQ (NASDAQ: LAES) became a lead investor in Quobly’s €130 million Series A, alongside ST Microelectronics, Isalt and BPI France. The investment, via the SEALSQ Quantum Fund, supports industrialization of silicon-based quantum processors and Quobly’s first commercial systems, and deepens their November 2025 technical partnership.

The Quantum Fund has grown from $20 million to $200 million since February 2025 and has deployed about $30 million (excluding this deal) into several quantum ecosystem companies. SEALSQ CEO Carlos Moreira will join Quobly’s board as part of the transaction.

Positive

• Lead participation in Quobly’s €130 million Series A financing
• SEALSQ Quantum Fund expanded from $20 million to $200 million
• Approximately $30 million already deployed across multiple quantum ecosystem companies
• Board seat at Quobly for SEALSQ CEO Carlos Moreira

Negative

• None.

Argus Jun 3 session

-6.74% close to close Open Argus

Details

News Market Reaction – LAES

On Jun 3, the day this news came out, LAES closed 6.74% below the previous close.

Data tracked by StockTitan Argus for the Jun 3 session.

Key Figures

Quobly Series A: €130 million Fund initial size: $20 million Fund current size: $200 million +1 more

Quobly Series A

€130 million

Quobly’s Series A financing round with SEALSQ as lead investor

Fund initial size

$20 million

Initial allocation of SEALSQ Quantum Fund at launch in February 2025

Fund current size

$200 million

SEALSQ Quantum Fund size as of the announcement date

Fund deployed (ex-Quobly)

approximately $30 million

Capital already deployed by SEALSQ Quantum Fund excluding Quobly round

Historical Context

5 past events · Latest: May 28

5 events

1. May 28

   Security validation milestone

   24h Move

   +6.9%

   QS7001 secure element achieved NIST SP 800-90B entropy source validation.

2. May 27

   Quantum investment

   24h Move

   -2.3%

   Additional strategic investment and lead role in upcoming EeroQ financing.

3. May 26

   New facility announcement

   24h Move

   +5.3%

   Quantix Edge Security chose Murcia for semiconductor design center project.

4. May 20

   Acquisition integration

   24h Move

   +4.1%

   Successful integration of IC’Alps to strengthen chip design capabilities.

5. May 20

   AI robotics roadmap

   24h Move

   +4.1%

   Launch of WISeRobot.ch AI robotics platform secured with post-quantum tech.

24h Move is the share-price change in the day after each event; other market factors may also have contributed.

Key Terms

post-quantum cryptography, hardware Root-of-Trust, fd-soi, microcontrollers, +2 more

6 terms

post-quantum cryptography technical

"to integrate post-quantum cryptography and hardware Root-of-Trust into silicon-based"

Post-quantum cryptography is a set of new methods for scrambling data so it stays secure even if powerful quantum computers exist; think of replacing today’s locks with designs that a future high‑speed lockpicker cannot open. For investors, it matters because companies must upgrade systems, meet regulations, and protect customer and trade data—creating costs, competitive advantages, or legal and reputational risks depending on how quickly and effectively they adopt these new security standards.

hardware Root-of-Trust technical

"integrate post-quantum cryptography and hardware Root-of-Trust into silicon-based"

A hardware root-of-trust is a small, tamper-resistant chip or built-in function that acts as the device’s foundational security anchor, like a locked safe for the device’s most sensitive keys and identity checks. It ensures a device boots only trusted software and protects encryption keys and authentication, which matters to investors because strong hardware security reduces risk of breaches, regulatory fines, recalls, and reputational damage while supporting customer trust and product adoption.

fd-soi technical

"By combining Quobly’s scalable FD-SOI quantum processors with SEALSQ’s"

FD-SOI (Fully Depleted Silicon On Insulator) is a semiconductor manufacturing technique that builds transistor switches on a very thin layer of silicon separated from the bulk wafer by an insulating layer, improving control over electricity flow. For investors, it matters because FD-SOI can deliver faster chips, lower power use and potentially lower production costs—like using a more efficient engine design—affecting a maker’s performance, market competitiveness and profit margins.

microcontrollers technical

"Co-development of quantum-resistant secure microcontrollers optimized for quantum"

Microcontrollers are small, self-contained computer chips that act like the brain of everyday electronic devices, controlling functions such as sensing, timing and communication. Investors watch them because their demand and supply influence sales, costs and innovation across industries—from cars and home appliances to medical devices and the Internet of Things—so changes in microcontroller markets can affect revenue growth, profit margins and supply-chain risk for many companies.

qubit technical

"protected from the qubit level against both current and future quantum threats"

A qubit is the basic unit of information used in quantum computers, like a coin that can be heads, tails or both at once until you look; this lets quantum machines process many possibilities simultaneously. For investors, qubits matter because their number, quality and stability determine how powerful a quantum computer can be, affecting which companies might gain an edge in fields such as cryptography, drug discovery, materials design or complex financial modeling.

quantum processors technical

"supports Quobly’s industrialization of silicon-based quantum processors and the"

Quantum processors are specialized computer chips that use the rules of quantum physics to process information with quantum bits (qubits), which can represent many possibilities at once rather than just 0 or 1. For investors, they matter because they promise drastically faster solutions for certain tasks—like searching databases, simulating materials, or optimizing complex systems—meaning companies that master or apply them could gain major technological and market advantages, but development is capital-intensive and risky.

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

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Geneva, Switzerland, June 03, 2026 (GLOBE NEWSWIRE) --

SEALSQ Corp (NASDAQ: LAES), ("SEALSQ" or "Company"), a leader in post-quantum semiconductor technologies and hardware-anchored security solutions, today announced its participation as a lead investor in Quobly’s €130 million Series A financing. The round is led by ST Microelectronics, SEALSQ, Isalt, and the French Public Investment Bank (BPI France).

The SEALSQ investment made via the SEALSQ Quantum Fund, supports Quobly’s industrialization of silicon-based quantum processors and the deployment of its first commercial systems. It strengthens the strategic technical partnership initiated in November 2025 and represents a major milestone in the execution of SEALSQ’s Quantum Vertical Sovereign Stack strategy. As part of this investment, Carlos Moreira, CEO of SEALSQ, will join Quobly’s Board of Directors.

Launched in February 2025, the SEALSQ Quantum Fund, a strategic investment initiative dedicated to advancing the quantum technology ecosystem, has grown from $20 million initial allocation, to $200 million as of today. The fund plays a key role in SEALSQ’s Quantum Vertical Sovereign Stack strategy by enabling targeted investments that strengthen the integration of quantum processing and cybersecurity from the ground up. Its mission is to accelerate the emergence of trusted, sovereign, and secure quantum infrastructure for industrial and critical applications.

Building secure quantum systems from qubit to root of trust
SEALSQ’s participation builds directly on the collaboration announced in November 2025 with Quobly to integrate post-quantum cryptography and hardware Root-of-Trust into silicon-based quantum architectures. By combining Quobly’s scalable FD-SOI quantum processors with SEALSQ’s quantum-resistant secure chips, including its QVault TPM and PQC solutions, the two companies are jointly developing secure-by-design quantum computing systems protected from the qubit level against both current and future quantum threats. This investment is expected to be a key step in SEALSQ’s roadmap to deliver a fully integrated Quantum Vertical Sovereign Stack, spanning hardware Root-of-Trust, post-quantum semiconductors, and secure quantum processors.

The collaboration will enable:

• Co-development of quantum-resistant secure microcontrollers optimized for quantum environments,
• Enhanced device authentication and key management for quantum systems,
• Creation of trusted, sovereign quantum computing platforms for high-value applications in defense, finance, energy, and critical infrastructure.
  
  

Mr. Moreira noted, “SEALSQ’s participation as a lead investor in Quobly’s Series A financing represents a significant milestone in the execution of our Quantum Vertical Sovereign Stack strategy. This investment made via the SEALSQ Quantum Fund, builds on the SEALSQ - Quobly technical partnership established in 2025 and reflects a shared commitment to advancing the next generation of secure quantum technologies. By integrating Quobly’s pioneering silicon quantum processors with our post-quantum cryptography and hardware security technologies, we are accelerating the development of truly secure quantum computers.”

Mr. Moreira continued, “Excluding this recent Quobly financing, SEALSQ Quantum Fund has deployed approximately $30 million of its $200 million of available funds, across IC'Alps, ColibriTD, EeroQ, WISeSat, Quantix Edge Security, and the WeCan Group, each reinforcing our Quantum vertical strategy from silicon to space. This expanded collaboration with Quobly positions SEALSQ at the forefront of trusted and sovereign quantum computing in the post-quantum era.”

Maud Vinet, CEO and co-founder of Quobly, added, “This investment from SEALSQ builds on the technical collaboration initiated in 2025 and supports our transition toward industrial deployment. As we bring our first silicon-based quantum computers to market, trusted semiconductor technologies and secure computing environments will become increasingly important for real-world adoption.”

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. The company 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 has offices in France, Singapore, and Canada.

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

FAQ

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

What did SEALSQ (NASDAQ: LAES) announce on June 3, 2026 regarding Quobly’s Series A financing?

SEALSQ announced it is a lead investor in Quobly’s €130 million Series A financing. According to SEALSQ, the investment supports industrialization of silicon-based quantum processors, deployment of Quobly’s first commercial systems, and advances its Quantum Vertical Sovereign Stack strategy.

How large is Quobly’s Series A round and who are the lead investors?

Quobly’s Series A financing totals €130 million, with SEALSQ as a lead investor. According to SEALSQ, other lead participants include ST Microelectronics, Isalt and the French Public Investment Bank (BPI France), backing industrial deployment of silicon-based quantum computers.

What is the size of the SEALSQ Quantum Fund in 2026 and how has it grown?

The SEALSQ Quantum Fund now totals $200 million in available capital. According to SEALSQ, it launched in February 2025 with $20 million, meaning the fund has expanded tenfold to support investments across the quantum technology and cybersecurity ecosystem.

How does the Quobly investment support SEALSQ’s Quantum Vertical Sovereign Stack strategy (LAES)?

The Quobly investment is described as a major milestone in SEALSQ’s Quantum Vertical Sovereign Stack roadmap. According to SEALSQ, it helps build secure, integrated quantum systems spanning hardware Root-of-Trust, post-quantum semiconductors and secure quantum processors for sovereign infrastructure.

What new role will SEALSQ CEO Carlos Moreira take at Quobly after the June 2026 deal?

Carlos Moreira will join Quobly’s Board of Directors as part of the investment. According to SEALSQ, this board role strengthens their strategic technical partnership and supports co-development of secure-by-design quantum computing platforms for high-value industrial and critical applications.

How much capital has the SEALSQ Quantum Fund deployed so far and into which areas?

Excluding the new Quobly deal, the SEALSQ Quantum Fund has deployed about $30 million. According to SEALSQ, investments span companies such as IC'Alps, ColibriTD, EeroQ, WISeSat, Quantix Edge Security and WeCan Group, reinforcing its quantum vertical strategy.