Practice Areas:
Commercial
Biography
Hallie B. Levin, a Fellow of the American College of Trial Lawyers, is a seasoned trial lawyer who serves as lead counsel on high-stakes commercial disputes in federal and state courts and arbitral tribunals.
Ms. Levin represents clients in connection with a broad range of matters, including complex contractual disputes, antitrust cases, business torts, trade secret cases, and high-stakes government investigations, including those brought by state Attorneys General. In recent years she won a resounding victory as co-lead trial counsel for clients T-Mobile and Deutsche Telekom in a landmark antitrust trial in which Attorneys General from 13 states and the District of Columbia failed in their effort to enjoin the merger of T-Mobile and Sprint. Ms. Levin examined critical witnesses at trial, including T-Mobile’s CEO and its President.
Ms. Levin was named Litigator of the Week by The American Lawyer Litigation Daily and a Winning Litigator by The National Law Journal in 2020 for her work on the trial. The favorable outcome was reported worldwide, including by The New York Times, The Wall Street Journal, The Financial Times, and Bloomberg.
In 2021, Ms. Levin was again named Litigator of the Week by The American Lawyer Litigation Daily after serving as lead trial counsel in a complete victory for T-Mobile in a breach of contract dispute against Cox Communications before the Delaware Court of Chancery. She was also featured in The American Lawyer Litigation Daily as a Litigation Leader and named among The American Lawyer’s 2021 Northeast Trailblazers.
She was honored in the 2020–2025 editions of Benchmark Litigation as one of the Top 250 Women in Litigation, a 2024–2026 Top 100 Trial Attorney, the 2024 General Commercial Litigator of the Year, a 2021–2026 Litigation Star, and a Top 10 Woman in Litigation in 2024 and 2025. Ms. Levin was also ranked in the 2022–2026 editions of Chambers USA for her general commercial litigation practice.
Her skills in the courtroom, nuanced strategic insights, and commitment to delivering efficient results have earned her the trust and loyalty of clients across industries including financial services, telecommunications, consumer products, hedge funds, and media.
Ms. Levin has demonstrated her commitment to improving the legal profession through leadership roles in several prominent organizations. She has served as Vice President of the New York City Bar Association and Chair of its Executive Committee. She is Treasurer and a member of the Executive Committee of the Federal Bar Council and previously served as its Vice President and Secretary. She has also served as Vice President of the Federal Bar Foundation and was a founding member and membership chair of the Federal Bar Council Inn of Court.
Ms. Levin represents clients in connection with a broad range of matters, including complex contractual disputes, antitrust cases, business torts, trade secret cases, and high-stakes government investigations, including those brought by state Attorneys General. In recent years she won a resounding victory as co-lead trial counsel for clients T-Mobile and Deutsche Telekom in a landmark antitrust trial in which Attorneys General from 13 states and the District of Columbia failed in their effort to enjoin the merger of T-Mobile and Sprint. Ms. Levin examined critical witnesses at trial, including T-Mobile’s CEO and its President.
Ms. Levin was named Litigator of the Week by The American Lawyer Litigation Daily and a Winning Litigator by The National Law Journal in 2020 for her work on the trial. The favorable outcome was reported worldwide, including by The New York Times, The Wall Street Journal, The Financial Times, and Bloomberg.
In 2021, Ms. Levin was again named Litigator of the Week by The American Lawyer Litigation Daily after serving as lead trial counsel in a complete victory for T-Mobile in a breach of contract dispute against Cox Communications before the Delaware Court of Chancery. She was also featured in The American Lawyer Litigation Daily as a Litigation Leader and named among The American Lawyer’s 2021 Northeast Trailblazers.
She was honored in the 2020–2025 editions of Benchmark Litigation as one of the Top 250 Women in Litigation, a 2024–2026 Top 100 Trial Attorney, the 2024 General Commercial Litigator of the Year, a 2021–2026 Litigation Star, and a Top 10 Woman in Litigation in 2024 and 2025. Ms. Levin was also ranked in the 2022–2026 editions of Chambers USA for her general commercial litigation practice.
Her skills in the courtroom, nuanced strategic insights, and commitment to delivering efficient results have earned her the trust and loyalty of clients across industries including financial services, telecommunications, consumer products, hedge funds, and media.
Ms. Levin has demonstrated her commitment to improving the legal profession through leadership roles in several prominent organizations. She has served as Vice President of the New York City Bar Association and Chair of its Executive Committee. She is Treasurer and a member of the Executive Committee of the Federal Bar Council and previously served as its Vice President and Secretary. She has also served as Vice President of the Federal Bar Foundation and was a founding member and membership chair of the Federal Bar Council Inn of Court.
Recent matter/case highlights
- Served as co-lead trial counsel for T-Mobile and Deutsche Telekom in the landmark antitrust litigation challenging the T-Mobile/Sprint merger, defeating efforts by Attorneys General from 13 states and the District of Columbia to block the transaction.
- Served as lead trial counsel for T-Mobile in a breach of contract dispute against Cox Communications, securing a complete victory before the Delaware Court of Chancery.
- Represents clients in high-stakes commercial disputes, antitrust actions, government investigations, trade secret disputes, and complex business tort litigation.
Key practice areas
- Commercial disputes
- Competition/antitrust
- Securities
- Consumer Fraud / False Advertising
- Trade secrets
Sector expertise
- Consumer goods and services
- Financial services
- Media
- Technology and telecommunications
Academic qualifications
- J.D., Harvard Law School, cum laude; Editor, Harvard Law Review
- B.A., History and Sociology of Science, University of Pennsylvania, summa cum laude; Phi Beta Kappa
Association memberships
- Fellow, American College of Trial Lawyers
- Vice President and Chair of the Executive Committee, New York City Bar Association
- Treasurer (former Vice President and Secretary), Executive Committee of the Federal Bar Council
- Vice President, Federal Bar Foundation
- Founding Member and Former Membership Chair, Federal Bar Council Inn of Court
Bar Admissions
- New York
- U.S. Court of Appeals for the Second Circuit
- U.S. Court of Appeals for the Third Circuit
- U.S. District Court for the Southern District of New York
- U.S. District Court for the Eastern District of New York
- U.S. District Court for the Eastern District of Michigan
Address:
Tel:+1 212 295 6710
Email:Contact this practitioner
Website:https://www.wilmerhale.com/en/people/hallie-levin
7 World Trade Center
250 Greenwich Street
New York, NY 10007