Mark Holder

Mark Holder is a Senior Managing Director and Chief Technology Officer at Citadel Securities, responsible for leading the firm’s systematic trading and risk functions, technology, and a variety of market and business initiatives globally.

Prior to joining Citadel Securities in 2019, Mark served as Global Head of Trading at Citadel for three years and was responsible for all trading and trading research functions and for leading the efforts to re-architect the firm’s trading systems.

Mark was previously Global Head of Quantitative Trading and Global Co-Head of Electronic Trading at UBS.

Mark graduated from the University of Oxford with a degree in Mathematics.

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