Osney Capital closes oversubscribed fund at £60m hard cap, as UK cyber appetite drives one of the country's largest debut seed funds

• £60m final close at hard cap, oversubscribed against £50m initial target, anchored by the British Business Bank through the Enterprise Capital Funds programme
• Investors joining the final close included Imperial College London's Endowment and Planet First Partners
• Osney Capital is the UK's first and only specialist cyber security seed fund, backing pre-seed and seed-stage UK cyber founders across all categories in the sector

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London, 29th June 2026: UK venture capital firm Osney Capital today announces the final close of its debut fund, oversubscribed at its £60m hard cap. The close makes Fund I one of the largest debut seed funds in UK history and cements its position as the UK's first and only specialist cyber security seed fund.

Cyber security is becoming an increasingly critical component for industry and governments. Growing geopolitical tensions and rising cyber threats have accelerated demand for sovereign cyber capabilities, creating a significant opportunity for UK cyber security companies, as one of the few markets with the depth of technical talent to create companies to meet these global demands.

The fund continues to be supported by a cornerstone commitment from the British Business Bank through its Enterprise Capital Funds (ECF) programme, and is accredited by the UK's National Security Strategic Investment Fund (NSSIF). Existing investors have been joined at final close by Imperial College London's Endowment and Planet First Partners, alongside further commitments from exited UK cyber entrepreneurs and senior leaders from across the cyber and national security communities.

In the year since its first close at over £50m, Osney has completed seven investments into early-stage UK cyber security companies at pre-seed and seed stage, writing cheques between £250k and £2.5m against a target portfolio of 30 companies. The investments span AI security, disinformation detection and software supply chain protection. The pace of deployment reflects the firm's conviction that the UK is producing world-class cyber businesses despite a longstanding shortage of specialist early-stage capital.

The UK is home to one of the world's deepest cyber security talent pools, supported by world-leading universities, a growing pipeline of cyber graduates — growing 20% year-on-year according to a 2025 government report — and a highly regarded national security community.

John Anderson, Chief Investment Officer at Imperial College London, said:

"Cyber security is an area of growing economic and strategic importance to the UK, with significant potential for home-grown innovations to become major commercial successes. Our investment in Osney Capital's first fund will give us exposure to this opportunity through a highly experienced specialist team, supporting our Endowment's objective of generating financial returns to support Imperial's mission of science for humanity."

Paloma McGuiness, CEO at National Security Strategic Investment Fund (NSSIF), said:

"Osney Capital brings the specialist focus required to strengthen the UK's cyber ecosystem. The quality of their early investments highlights the depth of talent and innovation in this country, and NSSIF is proud to support the Osney team as they fund and scale world-class UK cyber technologies."

Joshua Walter, founding partner at Osney Capital, said:

"Reaching final close oversubscribed at our hard cap, in this fundraising environment, is the clearest possible signal that investors see what we see: the UK's cyber sector is one of the most exciting early-stage opportunities globally, and it benefits enormously from specialist capital on the ground, supporting the formation of the next generation of global category winners from the UK."