K. Mallory Brennan is a partner in the Litigation practice at Shearman & Sterling LLP.

She focuses on representing global corporations and financial institutions in mergers and acquisitions litigation and transactional disputes, securities litigation, and other complex commercial disputes, including bankruptcy and antitrust actions. She also has experience counseling multinational corporations in connection with both internal and regulatory investigations.

Mallory has been ranked by Chambers USA in 2022 and 2023 for Securities Litigation. Mallory has been recognized by The Legal 500 as a Next Generation Partner for M&A Litigation: Defense from 2017 – 2023. In 2018, 2019, and 2020 Mallory was named to the Benchmark Litigation 40 & Under Hot List. She has also been named a “Rising Star” by the New York Law Journal and the Euromoney Legal Media Group