Quantum Systems raises €180M Series C extension at above €3B valuation

Evidence notes

• Quantum Systems raised €180 million in a Series C extension led by Balderton Capital.
• The extension followed its €160 million Series C in May 2025, bringing total 2025 capital raised to €340 million.
• The company said the round pushed its valuation above €3 billion and marked the largest private capital raise in Europe's dual-use sector.