Marion Leslie

Marion Leslie joined SIX Group in January 2020 as Head Financial Information and a member of the SIX Executive Board. Marion is the representative on the Executive Board for Sustainability and is also a member of the BME Board of Directors and the SIX Digital Exchange Board of Directors. As Head Financial Information, Marion leads the SIX global data business, serving financial institutions worldwide with critical data and insights to support their clients.

Leading global businesses and operations at scale, with a strong emphasis on data and technology, are the hallmarks of her career in financial services. Prior to joining SIX, Marion was Managing Director, Enterprise at Refinitiv (London Stock Exchange) with responsibility for delivering market data, platforms and services to the global financial markets.

Marion was named one of the 100 Most Influential Women in European Finance by Financial News in 2020, 2021, 2022 and 2023, was listed as one of Swiss Finance’s Women to Watch in 2022 and was included in the World Federation of Exchanges Women Leaders List 2021. In 2017, she was nominated in the Cranfield University Female FTSE 100 Women to Watch Board Report and in 2014 was the winner of the Award for Achievement at the Women in Banking and Finance Awards.

Marion is on the board of Advance, the leading business association for gender equality in Switzerland. She is Chair of the UK Hydrographic Office, a UK government trading fund, part of the Ministry of Defence.