A EUR152 million Series B, confirmed and detailed
QuantWare, the Delft-based quantum-processor maker, closed a EUR152 million (about USD178 million) Series B on 5 May 2026, in a round the company and multiple outlets describe as the largest deep-tech Series B any Dutch company has raised.
New investors Intel Capital, In-Q-Tel and ETF Partners led the new money, alongside existing backers FORWARD.one, Invest-NL Deep Tech Fund, InnovationQuarter Capital, Ground State Ventures and Graduate Ventures; QuantWare said the round was oversubscribed and no valuation was disclosed.
The industrial bet: KiloFab and VIO-40K
The money is earmarked for two linked goals: finishing VIO-40K, a modular processor architecture designed to scale to 10,000 qubits and roughly 40,000 input-output lines using a three-dimensional chiplet design, and building KiloFab, which QuantWare calls the world's largest dedicated fab for open-architecture quantum devices.
KiloFab is meant to lift QuantWare's production capacity roughly 20-fold, with first customer shipments from the new facility expected in 2028; CEO and co-founder Matt Rijlaarsdam said the promise of quantum computing can only be realised once it can be manufactured and deployed at scale.
How the round compares
EUR152 million is large for a Dutch Series B, but it sits inside a bigger wave of quantum-hardware capital: Finland's IQM closed roughly EUR300 million and Quantinuum, majority-owned by Honeywell, closed roughly USD600 million, both in September 2025.
| Company | Country | Round | Amount | Date |
|---|---|---|---|---|
| QuantWare | Netherlands | Series B | EUR152 million (USD178 million) | May 2026 |
| IQM | Finland | Growth round | EUR300 million | September 2025 |
| Quantinuum | United Kingdom / United States | Growth round | USD600 million | September 2025 |
Unlike IQM and Quantinuum, which sell complete quantum computers, QuantWare sells the processors and components other builders integrate, so its round is best read as the largest bet yet on the supply chain underneath the machines, not on a finished computer itself.
What it means for enterprise and public-sector buyers
For a buyer, the detail that matters is not the size of the cheque but what it is paying for: KiloFab is a production line, not a lab upgrade, and QuantWare says it already ships to more than 50 customers in 20 countries, including national research institutes and large technology companies.
In-Q-Tel's participation, a strategic investor tied to US intelligence-community priorities, is itself a signal that government-adjacent buyers already treat quantum hardware as a procurement question; European enterprises and public bodies still filing quantum under "watch and wait" have a shrinking window before that changes for them too.
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