Olivier Tonneau, Founder & Partner, Quantonation
Olivier Tonneau works on one of the most consequential questions in emerging technology: which scientific breakthroughs are ready to become companies — and which can ultimately become industries.
A founder and partner at Quantonation, Olivier Tonneau invests at the point where technical ambition meets commercial risk. Before launching the firm, he spent roughly a decade in management consulting at Kearney and later served as CEO of Gravitation, the investment holding company of entrepreneur Charles Beigbeder.
That background gave him a perspective shaped by both business strategy and capital allocation.
At Quantonation, he has applied it to one of the hardest areas of venture investing: quantum and deep-physics technologies, where scientific risk is high, development cycles can be long and conventional startup metrics often arrive late.
In 2026, Quantonation closed a €220 million second fund focused on quantum and physics-based technologies, building on a first fund that backed 27 companies worldwide. Its strategy now spans quantum computing, sensing, photonics, materials and other technologies rooted in advanced physics.
The Distinction
Olivier Tonneau’s significance lies in the discipline of investing in technologies before their commercial pathways are fully established.
Quantum companies often require substantial capital long before they can demonstrate meaningful revenue. Investors must therefore evaluate not only markets and management teams, but also the credibility of the underlying science, the path to industrialization and whether a technology can eventually scale.
That requires a different kind of judgment.
Tonneau’s influence also extends beyond individual investments. He serves on the boards of multiple quantum companies across computing, security, sensing and enabling technologies, as well as on the board of the European Quantum Industry Consortium, giving him a broad view of how the sector is developing.
The Bigger Signal
Tonneau’s career reflects a broader shift in deep-tech investing.
The challenge is no longer simply to finance promising science.
Increasingly, the question is whether that science can be industrialized.
That transition is becoming visible across Quantonation’s portfolio. In June 2026, Quobly raised €115 million in Series A financing to advance the industrialization of its silicon-based quantum computing platform — an example of the kind of capital intensity required as quantum companies move from laboratory development toward manufacturing and scale.
That is why The Quantum Investor fits.
Olivier Tonneau represents the capital layer of the quantum ecosystem — the point where scientific potential is tested against the demands of industrialization, competition and commercial viability.
What to Watch: Which technologies Olivier Tonneau and other specialist investors increasingly back as quantum moves from broad experimentation toward industrial execution — and whether private capital can support the long timelines and infrastructure required to turn scientific breakthroughs into durable companies.
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