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February 19, 2026

Quantum Systems founder sold stake in ARX Robotics prior to launch of similar product

The incident reveals a tangled web of investors and rivals in the new defence tech ecosystem


Anne Sraders

3 min read

Florian Seibel, cofounder and co-CEO of Quantum Systems. Courtesy of Quantum Systems

The founder of German drone maker Quantum Systems has sold his stake in unmanned ground robot maker ARX Robotics a month before launching a similar product. 

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ARX Robotics' Hector drone
ARX Robotics' Hector drone. Courtesy of ARX Robotics
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Anne Sraders

Anne Sraders is a senior reporter at Sifted, based in Berlin. She covers the VC industry and deeptech startups. She also writes Sifted's weekly VC newsletter Up Round. Follow her on X and LinkedIn

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