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Finance

Marex Shakes Up Equities Financing, Taps Delta One Expert for Top Leadership Role

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By TruthVoice Staff

Published on September 11, 2025

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Marex Shakes Up Equities Financing, Taps Delta One Expert for Top Leadership Role

In a significant move to bolster its leadership team in the Americas, global financial services platform Marex has announced the elevation of Mack Dowdall to a pivotal new role. Dowdall has been appointed as the co-head of equities financing for the Americas, a promotion that signals the firm's confidence in his expertise and strategic vision.

Operating from the company's New York hub, Dowdall will steer the division's strategy and operations alongside his counterpart, co-head Mario Venditti. This powerful leadership duo is set to report directly to Vaughan Tredwell, the head of capital markets for the US at Marex. The appointment is seen as a strategic step to enhance Marex's capabilities and competitive edge in the highly dynamic equities financing market.

The promotion marks the latest milestone in Dowdall's impressive ascent within the company. He has been an integral part of the Marex Capital Markets team since 2021, where he previously excelled as the head delta one trader. His journey to Marex began following a successful tenure at ED&F Man, a firm that was later strategically acquired by Marex, integrating its talent and resources into the growing platform.

Dowdall's career is decorated with a series of high-impact roles at prominent financial institutions. Before his time at ED&F Man, he served as a trading strategist in equity derivatives at BMO Capital Markets, where he honed his skills in complex trading strategies. His early career also includes a formative period between 2017 and 2018 as a hedge fund analyst at SALI, providing him with a deep understanding of the buy-side perspective.

Underpinning his extensive industry experience is a strong academic foundation. Dowdall holds a degree in economics and finance from the prestigious University of Texas at Austin. It was there that he developed a specialized expertise in applied statistical modelling, a quantitative skill set that has undoubtedly contributed to his success in the data-driven world of modern finance. This appointment leverages his unique blend of trading acumen and analytical prowess to drive Marex's equities financing business forward.

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