Leon Saunders Calvert

Leon Calvert

Partner & the Chief Product Officer
ESG Book

Leon Saunders Calvert is a Partner & the Chief Product Officer at ESG Book, a fintech providing sustainability data, analytics and software to financial markets and businesses. With a focus on climate analytics, regulatory solutions, and corporate disclosure utility tools, ESG Book has created differentiated IP to support the fast paced growth of a company which now has 200+ employees, 100+ clients, including some of the largest financial institutions in the world, and strong financial backing from renowned venture capital and strategic investors.

Previously, Leon worked at the London Stock Exchange Group (LSEG) as a Group Director where he held a number of roles during his 15 year tenure, arriving at LSEG through the acquisition of Refinitiv, formerly the Financial & Risk business of Thomson Reuters. These roles included running Business Management for the Investment & Wealth Solutions division, and leading a number different business lines such as Research & Portfolio Management, Sustainable Investing, Lipper, StarMine and Investment Banking. His prior experience includes running the research and data teams at Mergermarket (now Acuris, an ION company), a provider of M&A intelligence to the advisory community, and he started his career as an M&A Analyst at an advisory boutique, Regent Partners. He has a Masters Degree in International Management and a BA Hons in Philosophy and Literature.

Leon has provided pro-bono consultative advice to charities through the Pilotlight business executive program and through UnLtd's social entrepreneurs mentorship program. Leon is an Advisory Board member of AidHub, a platform for NGO’s, charities and companies to manage and measure their social impact initiatives, and Quoroom, who provide capital management software services to corporates.

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