Kathleen S. McArthur

Kathleen S. McArthur

Partner, Sullivan & Cromwell LLP
[email protected]

Kathleen S McArthur is a partner in Sullivan & Cromwell’s litigation group, where she serves as co-head of the commodities, futures and derivatives group as well as the firm’s securities and commodities investigations and enforcement practice. She has advised some of the world’s biggest companies on major matters involving complex financial products and physical commodities, including enforcement inquiries, internal investigations and commercial litigation. Katy has a keen understanding of trading and markets that enables her to advocate effectively for clients facing even the most complex allegations of fraud or market manipulation, including proceedings brought by the CFTC, SEC, FERC and DOJ. Among other accolades, she has been recognised by Chambers USA for derivatives and derivatives enforcement (2021) and selected as one of Global Investigations Review’s top 100 ‘Women in Investigations’ worldwide (2021). She also has been identified by Who’s Who Legal as one of North America’s ‘Future Leaders in Investigations’ (2020, 2021). Katy is a fellow of the Leadership Council on Legal Diversity and a native speaker of Spanish; she also is fluent in Portuguese.

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