C5 Capital is a global venture capital and private equity firm headquartered in London, specializing in investments within cybersecurity, cloud infrastructure, and clean energy sectors. The firm focuses on companies addressing critical challenges related to data security, national security, and environmental sustainability. It invests across stages and provides capital alongside strategic support, including access to government and industry networks. C5 Capital operates internationally, with a presence in Europe and the United States, and emphasizes long-term value creation through technology-driven investments. Its strategy centers on the secure data ecosystem and infrastructure supporting digital and energy systems.