C5 Capital is a London-based venture capital and private equity firm specializing in investments within the cybersecurity, cloud infrastructure, and clean energy sectors. Established in 2014, the firm focuses on supporting companies that address critical global challenges, particularly in areas of national security, data protection, and environmental sustainability. C5 Capital emphasizes technology-driven industries, with a strong focus on cybersecurity, secure data platforms, and clean energy innovations.

Beyond financial backing, the firm provides operational expertise, global networks, and strategic partnerships to help portfolio companies scale effectively. With offices in London, Washington, D.C., and Luxembourg, C5 Capital leverages its international presence to connect portfolio companies with key markets and partners.