24Haymarket

24Haymarket is a prominent UK-based investment firm specializing in growth equity and venture capital. The firm focuses on accelerating the commercial success of high-growth companies that have already demonstrated initial commercial traction. They employ an active investment philosophy, typically taking a board seat in each investment and providing involved post-investment support. 24Haymarket is distinguished by its extensive Investor Network, comprising over 100 sophisticated private investors with thousands of years of collective entrepreneurial, investment, and operational experience.

Founded in 2012, 24Haymarket was co-founded by Paul Tselentis, Simon Leefe, and Lindsay Stuart, with Marek Gumienny also being a founder member of the group. The firm's approach is to align private capital with ambitious founders, offering not just funding but also strategic guidance and access to their vast network of experienced professionals. This model emphasizes partnership and transparency, aiming for a swift investment process, often completing deals within six weeks of initial conversation.

The firm has invested over £104 million in 56 lead investments, with an average ownership of 18%. Notable companies in their portfolio include Wattbike, proSapient, Brain in Hand, Hybrid Access, Equilume, Monterosa, Cydar Medical, Amicable, Angoka, Aptem (MWS Technology), AYR, Azadyne, Blackbullion, Dogtooth Technologies, and Dragonfly AI. 24Haymarket's investments span various high-growth sectors such as climate tech, consumer and leisure, cybersecurity, healthcare, professional services, supply chain, and the future of work.

The leadership team includes Paul Tselentis as CEO and Board Member, Marek Gumienny, Simon Leefe, and Lindsay Stuart as Board Members, all bringing substantial experience from private equity and investment banking. Lucie Mazánková serves as Head of Operations and Compliance, while Jamie Dunnett and Alexandra Brown are key members of the investment team. This collective expertise allows 24Haymarket to provide robust support and strategic direction to its portfolio companies, fostering their growth and market expansion.