The Largest Venture Capital Firms in the UK

A venture capital firm raises committed capital from institutions and backs private companies in exchange for equity. The list below covers the largest such firms headquartered in the United Kingdom, ranked by assets under management or capital raised. Index Ventures leads: its 2024 fund closes took cumulative capital raised to roughly $15 billion, per the firm's announcement, though it runs its operations from London and San Francisco in equal measure. Eight Roads, the proprietary investment arm of Fidelity, follows with $8 billion across technology and healthcare, ahead of Balderton Capital, which closed $1.3 billion across early- and growth-stage vehicles in 2024 and counts Revolut among its defining positions. Atomico, founded by Skype's Niklas Zennström, completes the top tier after raising a $1.24 billion dual fund the same year.

The more interesting question is what counts as a British firm at all. Index splits its base between London and San Francisco; Eight Roads is Fidelity's proprietary capital; and BGF, at the bottom of the table, is a bank-backed growth investor rather than a conventional fund manager. Strip those out and the pure UK venture establishment is thinner than the headline numbers suggest: a handful of firms above $2 billion, then a long tail of specialists, with Dawn Capital in B2B software, IQ Capital in deep tech, and Phoenix Court in seed-stage investing. The direction of travel is positive, though. Notion Capital's $130 million growth fund in 2025 pushed the firm past $1 billion, per TechCrunch, part of a wave of closes aimed at Europe's follow-on funding gap. Private venture firms rarely publish audited AUM, and several figures here are estimates, so close orderings are approximate.

The market behind these firms had its strongest year since the 2021 peak. UK startups raised $23.6 billion in venture funding in 2025, up 35% year over year and the first annual increase in four years. Fund managers replenished too: UK-managed private equity and venture funds collected £58.7 billion in 2025 and invested £25.0 billion into British companies, per UK Private Capital. The wider region puts that scale in context. European venture AUM reached roughly $305 billion in 2025, a sliver of the near-$3.5 trillion managed globally, which means London's firms compete for deals against American and Asian managers with far deeper pockets. Each firm in the table links to a live Altss profile tracking its funds, partners, and activity.