Investing in Quantum: Key Public Companies in the US and Europe
33 pages · PDF · 24 August 2025 · Licensed single-user copy, watermarked to the buyer
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About this report
Quantum computing has transitioned from pure research to an emerging industry, with a handful of companies now publicly traded. Many leading quantum players (e.g. Google, IBM, Microsoft) are large tech firms where quantum is a small segment, but direct exposure for investors comes from specialized pure-play quantum companies.
Below we analyze the main publicly-listed companies in the quantum computing and related quantum technologies space (focusing on US and Europe), excluding still-private startups. For each company, we provide basic facts, financial metrics, business model, technology approach, partnerships, history, risks, and an investment outlook, enabling a side-by-side comparison.
Key questions this report answers
- Which publicly listed pure-play quantum companies (IonQ, Rigetti, D-Wave, Quantum Computing Inc., Arqit) define the US and European landscape?
- How do their differing technology approaches (trapped-ion, superconducting, quantum annealing, photonic, quantum-safe encryption) compare?
- What business models, financial metrics, partnerships and risks distinguish these firms for investors?
- What comparative investment outlook and considerations emerge across the listed quantum sector?
Inside this report
- IonQ (NYSE: IONQ) – Trapped-Ion Quantum Computing Leader
- Rigetti Computing (Nasdaq: RGTI) – Superconducting Quantum Chips with In-House F
- D-Wave Quantum (NYSE: QBTS) – Quantum Annealing Pioneer Expanding to Gate Models
- Quantum Computing Inc. (Nasdaq: QUBT) – Photonic Quantum Computing and Sensing
- Arqit Quantum (Nasdaq: ARQQ) – Quantum-Safe Encryption Software Provider
- Comparative Outlook and Investment Considerations
Who it's for
Strategy, corporate-development and investment teams that need an ecosystem-level view — budgets, industrial capacity and technology landscapes — before committing capital or capacity.
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Methodology, format & delivery
DFM reports are built from primary and official sources — TED procurement notices, CORDIS and the EU Funding & Tenders Portal, EIB operations, the NATO Innovation Fund portfolio, SIPRI data, official budget documents and company disclosures — read together with the underlying legal texts. Sources are cited in the document; it reflects them as of its publication date (24 August 2025). You receive a 33-page PDF, watermarked to you on every page, delivered on the confirmation page and by e-mail immediately after checkout (personal link valid 72 hours, up to 5 downloads). Guest checkout, single-user licence — Terms of Sale.
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