Quantum Systems, the German autonomous defense startup, has raised $1.2 billion in a Series D funding round, valuing the company at approximately $8 billion on a post-money basis. The round was co-led by Blackstone, Noteus, Airbus, and Advent, with participation from Bond, Fidelity Management and Research Company, Balderton, and HV Capital.
The company develops unmanned systems designed to operate across land, air, and sea domains. Co-CEO and co-founder Florian Seibel said the new capital will fund expanded production capacity, supply chain resilience, scaled delivery across allied markets, and continued investment in software and AI capabilities. Seibel also confirmed the company is profitable.
Quantum Systems has deployed its technology in Ukraine, where its systems executed more than 19,000 missions in 2025. The company has established a production footprint across Germany, Ukraine, the United States, Australia, Romania, the United Kingdom, and the Baltics.
The raise reflects accelerating investor interest in defense technology. According to data firm Dealroom, defense tech companies have raised a record $17.4 billion so far in 2026, well above the $11.2 billion raised across all of 2025. Major rounds this year include Anduril’s $5 billion raise in May, Shield AI’s $2 billion in March, and Saronic Technologies’ $1.75 billion in the same month.
European defense investment is also intensifying. Helsing is reportedly in the process of raising $1.2 billion at an $18 billion valuation, while Stark closed a 500 million euro round in June led by Sequoia Capital and Founders Fund.
