John Stewart

John Stewart has a diverse work experience spanning over three decades. John currently holds the position of Co-Chief Executive Officer at Osttra since September 2021. Prior to this, they worked at IHS Markit | Technology as a Senior Vice President from November 2016 to September 2021. John has also held various roles at UBS, including Head of Transformation, UK Group COO, Program Director, and Head of Group Data Services from 2012 to 2016. John served as a Board Member at Euroclear from 2008 to 2013. Before that, John worked at UBS Investment Bank as the Global Head of Operations and Head of Equity Operations. John started their career at JPMorgan Chase & Co. and J.P. Morgan, where they held roles related to credit markets, middle office, and equity derivatives. John began their professional journey as a Chartered Accountant at Arthur Andersen & Co. in 1990.

John Stewart attended the University of Oxford from 1987 to 1990, where they earned their Master of Arts (M.A.) degree in History.