Wisekey International Holding Ltd. Class B · SIX:WIHN
Wisekey International Holding Ltd. Class B — SPAC Merger (November 2025)
25 slides from Wisekey International Holding Ltd. Class B's SPAC merger presentation, Nov 18, 2025
Slide 1: WISeSat business combination with Columbus Acquisition Corp.
| WISCSat A wholly-owned subsidiary of WIS@key i (SIX: WIHN, NASDAQ: WKEY) = — > Ly ae <= A, ee = E fs November 972025~—/ == “ i i ) = — Cae | wiSeKey International Holding AG (Nasdaq: WKEY) and Columbus Acquisition Corp. (Nasdaq: COLA) Execute Definitive Business Combination Agreement to Publicly L
Slide 2: Important information about the proposed business combination
In connection withthe proposed business combination, wiSeSat Space Holdings Corp. (*Pubco") wil fle registration statement on Form F-(the “Regitraton Statement”) that wilincude'a prowy statement of Columbus Acquistion Corp. ("columbus") and a prospectus of Pubco, The Registration Statement has not b
Slide 3: Securing the Internet of Things from Space
Securing the Internet of Things from Space WISeSat.Space — the space arm of WISeKey 100-satellite constellation planned delivering ultra-secure nanosatellite loT by 2030. connectivity. Quantum-ready, end-to-end secure Strong ecosystem of European and communications from orbit. global partners. WISCS
Slide 4: Company Overview
Company Overview Subsidiary of WISeKey, Swiss-based cybersecurity leader. ¢ Enables secure loT data transmission anywhere on Earth. ¢« Combines space, loT, and cybersecurity expertise. * Operates under European digital sovereignty principles. WSS at 4
Slide 5: Transaction Overview
Transaction Overview WESGSat WiSekey International Holding AG (WISeKey) (Nasdaq: WKEY) to take public its subsidiary WISeSATSpace Corp. (WISeSat), through a SPAC business combination with Columbus Acquisition Corp. WiSeKey (market cap $108.2M)}* functions as a holding company and has had historical
Slide 6: Transaction Details
Transaction Details Pro Forma Valuation’? (Smm, except per share data) Pro Forma Share Ownership Pro Forma Shares Outstanding" 348 Existing Target Shareholders (Incl. Shares to Advisor) 25,000,000 71.8% (x) Illustrative Share Price $10.00 PAC PublicShareholders (Incl. Public Rights) 7,087,148 20.3%
Slide 7: Investment Highlights
Investment Highlights Contracting with Swiss Governmental es Financial Support from Significant Market Ofsanizauon: and Parent Grou Opportunit International Logistics P PP y Companies Perpetual Licenses for ane acne shan Seasoned Attractive Entry Point By Management With Growth Potential WlSeKey and
Slide 8: Vision, Mission & Goal
Vision, Mission & Goal Vision: Build a secure, quantum-resilient space infrastructure for loT. Mission: Deliver trust, security, and connectivity across the planet — even in remote regions. Goal: Democratize space-enabled loT for global industries. WISCSat
Slide 9: Market Opportunity
Market Opportunity Rising demand for secure, sovereign communications. 25 Billion WISeSat is positioned to provide Global loT devices expected to affordable and secure satellite loT access exceed by 2030. 60%+ Of the world lacks reliable terrestrial connectivity. WISCSat °
Slide 10: Technology Stack
Technology Stack WlSeSat Nanosatellites: Low Earth Orbit (LEO) platforms. LPWAN Protocols: LoRa & NB-IoT for scalable loT networks. iNeS Platform: Secure cloud for identity and data management. SEALSQ Quantum-Ready Semiconductors for ee post-quantum encryption. WISSSat ”
Slide 11: Security & Cryptography
Security & Cryptography Authentication Authorization Verify device identities. Control data access. * End-to-end encryption and device authentication. * Post-quantum cryptography integrated at hardware level. WISCSat [a] x) Encryption Integrity Protect transmitted information. Ensure data remains un
Slide 12: Satellite Constellation Plan
Satellite Constellation Plan Progressive deployment toward 100 satellites by 2030. Generational growth with enhanced coverage and bandwidth. Supports real-time loT operations across all geographies. WISCSat 2
Slide 13: Direct-to-Device (D2D) Services
Direct-to-Device (D2D) Services Secure communications directly to loT sensors — no ground gateway. Ideal for defense, energy, logistics, and critical infrastructure. Enables independent, resilient data transmission. WISSSat s
Slide 14: Strategic Technology Partners
WISCSat Strategic Technology Partners Additional partners... + An Indian based launch collaboration signed in 2025. + A European-based launch partner signed in 2025. + A European LEO satellite service WISeSat collaborates with world-class innovators to deliver secure, provider to expand the European
Slide 15: Use Case: Utilities
Use Case: Utilities Pipeline Optimize resource + sant ; 25-50% of distributed distribution and water lost due to leaks i reduce losses. eke) Or poor pressure : hae control M ree: Water tank: water Cities: smart ity level monitoring metering JoT nodes monitor pressure, Reduced losses, predictive flow
Slide 16: Use Case: Oil & Gas
Use Case: Oj! & Gas Ensure safety, reduce va \, Pipelines in remote Node leakage, and r regions with high maintenance costs. r a inspection costs. Oil tank Pipelines: OT sensors measure voltage, Prevent corrosion, reduce emperature, pressure. downtime, enhance ESG compliance.
Slide 17: Use Case: Agriculture
Use Case: Objective: Increase efficiency and sustainability in agriculture. Challenges: Limited connectivity in rural areas for precision farming. W1SeSat Solution: loT sensors track soil humidity, Weather, crop conditions. Benefits: 30% resource savings, higher yields, Cclimate-smart farming.
Slide 18: Use Case: Defense & Security
Use Case: Defense & Security Enable independent, a LG p ~ High SATCOM costs, sovereign defense vulnerability to communications. ntconee mene jamming/spoofing. 1oBT sensors, SIGINT detection, 5G Strategic autonomy, secure tactical networks. real-time intelligence.
Slide 19: Blockchain & SEALCOIN from Space
Blockchain & SEALCOIN from Space First blockchain transaction from orbit achieved in 2024. Integration of WISeKey, SEALCOIN, SEALSQ, and Hedera technologies. Foundation for decentralized, space- based digital economy. WISSSat REVOLUTIONIZING 1OT, SATELLITE & BLOCKCHAIN SEALCOIN enables loT devices t
Slide 20: Key Differentiators
Key Differentiators Security Utilizes advanced encryption, including SEALSQ's post- quantum cryptography, to safeguard critical loT data against current and future threats. WISCSat iC Cost-Effective Easy Deployment Global Coverage Sovereign Offers low-cost satellite loT connectivity, reducing deploy
Slide 21: Recent Milestones (2024-2025)
Recent Milestones (2024-2025) ¢ Launch of next-gen satellites via SpaceX (January and June 2025). * Creation of WISeSat Espafia SA (Andalusia HQ). MoU with a military provider for secure communications. Multiple partnerships to expand the network of providers, launches and our LEO constellation. Lau
Slide 22: Recent Milestones (2024-2025)
Recent Milestones (2024-2025) YS 40TH SPACE-SYMPOSIUM AAT 225 a SEALS and WiSeSat to ‘Showcase Breakthrough Post- Quantum Satelite Technology at ‘the 40th Annual Space ‘Symposium In Colorado Springs WiseSat Space Creates WiSeSat Espana SA Subsicary to Lead European Space Projects trom ‘Andalusia and
Slide 23: Roadmap to 2030
Roadmap to 2030 Full 100- satellite constellation operational. * Quantum- resistant loT economy. ¢ Expansion to 50 satellites, D2D rollout. ¢ 2nd-gen satellite launch (Nov.). WISCSat *
Slide 24: Closing / Call to Action
Closing / Call to Action * Redefining secure loT from orbit. * Proven technology, strategic partnerships, and strong market demand. ¢ Seeking investment to accelerate constellation growth and adoption. WISCSat 24
Slide 25: Thank you
WISCSat Thank you WlSeKey SA The Equity Group Inc. +21502-555-0152 Lena Cati info@wisekey.com Tel: +1 212 836-9611 www.wisesat.space Icati@theequitygroup.com
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