Why 24Haymarket?
Headquartered in London and with a regional office in Edinburgh, we are distinguished by the calibre and engagement of the 24Haymarket Investor Network.
We follow a strict investment thesis with a focus on verticals in the nascent stages of high growth where we can leverage proprietary insight from our Investor Network.
We focus on investing in companies that have demonstrated initial commercial traction.
We adhere to an active investment philosophy with a right to a board seat in each investment we pursue combined with an involved post-investment model.
Key Facts
3,000+
Years of collective entrepreneurial, investment and operational experience
100+
Sophisticated, engaged private investors
£104m
Syndicate members' own capital invested
£1-£5m
Initial investment with follow-on ambition and capacity
56
Lead investments
18%
Average ownership
Our Values
Connectivity
Thousands of years of collective experience.
Alignment
Direct financial commitment to each of our investments.
Transparency
We aim to complete within 6 weeks of first conversation.
Partnership
We seek to optimise each investment we make.
Key People
Paul Tselentis Paul is a co-founder and CEO of 24Haymarket. He previously spent over ten years working in private equity at The Carlyle Group and CCMP Capital and in Investment Banking at Lehman Brothers. Paul has a BA (magna cum laude) in Economics from Harvard University.
Marek Gumienny Marek has substantial experience in private equity, during which time he has successfully invested in and exited a range of companies across many sectors, geographies and economic cycles. He is a founder member of the 24Haymarket Group and sits on many boards including Brain in Hand, Hybrid Access, Equilume, Monterosa and Cydar Medical.
Simon Leefe Simon is a co-founder of 24Haymarket and a former partner of Candover Partners Limited where he focused particularly on the media and IT Services sectors. Simon read English Literature at Exeter University.
Lindsay Stuart Lindsay is a former Managing Partner of JPMorgan Partners Europe and co-founder of 24Haymarket. He also worked at Cinven, Prudential Venture Managers, and Candover during his career.
Lucie Mazánková Lucie joined 24Haymarket in June 2024 as Head of Operations. She has over 13 years in the financial industry and family offices and has an MSc in Finance.
Jamie Dunnett Jamie is an Investment Director at 24Haymarket, having joined the firm in 2016. He previously spent five years at Deloitte in the Transaction Services team. Jamie is a graduate of Durham University.
Alexandra Brown Alex is a Senior Associate at 24Haymarket, having joined permanently in 2022. She has experience in the healthcare sector and previously spent 4 years at Accenture. Alex has an MBA from London Business School.
James Campin James joined 24Haymarket as an Investment Executive in 2021. He previously spent three years at Strategy8 (PwC) in the Deals Strategy team. James is a graduate of the London School of Economics.
The investment by 24Haymarket has been a catalyst for Wattbike, both strategically and operationally. 24Haymarket’s track record and know-how in working with businesses at our stage of development has been invaluable. The support, rigour and strategic direction are applied with the right balance and timing.
Richard Baker, CEO Wattbike
24Haymarket has supported our business over multiple years with more than just investment funds. The team at 24Haymarket are collegiate and supportive of their portfolio businesses. We greatly appreciate our relationship with 24Haymarket and believe that their approach is both rare and of high quality.
Jordan Shlosberg, CEO proSapient
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