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Mandy DeFilippo

Lecturer on Law

Spring 2024

Mandy DeFilippo
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Mandy is a Managing Director and COO of Legal & Compliance, Risk and Operations at Citadel Securities. She joined Citadel in 2022 from Morgan Stanley, where she was a Managing Director and Global Head of Business Unit Risk Management for the Fixed Income & Commodities Division.

Mandy joined Morgan Stanley in 2007, in the Global Capital Markets division, based in London. She first worked in the Equity Capital Markets team, and from 2011 until 2013, she ran the Capital Markets Structuring Team in GCM EMEA for both debt and equity products. From 2013 until the beginning of 2017, Mandy was Chief Operating Officer for Global Capital Markets in EMEA, and Chief Risk Officer for GCM International, covering EMEA, Asia-Pacific and Japan.

Mandy is an active participant in industry-wide organizations in the financial markets, including initiatives to establish industry standards. She is the Chair of the International Capital Markets Association (ICMA), a role to which she was first elected in May 2018 (she was re-elected in 2020); she is the first woman Chair in the organization’s 50+ year history.

Mandy has been active as a public speaker about risk management and related topics, as well as leadership and diversity in the financial services industry more broadly. In 2019, Mandy was named by Financial News as one of the Top 100 Most Influential Women in European Finance. She was also featured by Euromoney with an individual profile as part of their 50th anniversary series focusing on the past 50 years in the capital markets (2019).

At Harvard Law School, Mandy served as the Klinsky Professor of Leadership and Progress for the 2019-2020 academic year and has returned to campus as a Lecturer on Law in subsequent years.

Before entering the world of investment banking, Mandy was a practicing US corporate and securities lawyer at Allen & Overy LLP in London. She is currently based in New York.


  • B.A. English & Political Science Columbia University in the City of New York, 1997
  • J.D. Harvard Law School, 2000