Luna Ngan Barrington
Biography
Luna’s trial work and strategic judgment have earned her broad industry recognition. Chambers USA ranks her among the leading commercial litigators in New York, with clients describing her as “proactive,” “efficient,” and “an excellent litigator” who “promptly turns things around.” Benchmark Litigation has named her a “Future Star” and included her on its 40 & Under List from 2023 to 2025. She is also recognized by Lawdragon 500 as one of the “Leading Litigators in America,” and has been selected by Law360 as a national Trials “Rising Star,” and shortlisted by Euromoney’s Women in Business Law Awards as a “Rising Star in Litigation.”
Luna serves as lead trial counsel in complex domestic and cross-border disputes. Her recent engagements include defending a major, UK-based publicly traded company in high-stakes litigation brought by its board of directors; representing a class of professional tennis players in an antitrust lawsuit against the Grand Slams and the men’s and women’s professional tennis tours; and representing Altria in significant post-judgment proceedings in a significant intellectual property dispute.
Her trial practice also encompasses major commercial, product liability, and securities disputes. Luna secured a decisive post-trial victory for Serta Simmons Bedding after a five-day bench trial that facilitated the company’s emergence from chapter 11. She obtained a complete arbitration victory for a major e-commerce company in a nine-figure contract dispute following a five-day evidentiary hearing. Luna also helped deliver a complete defense jury verdict for Johnson & Johnson in the talc mass tort litigation, and successfully defended Sasol Limited in a $200 million securities class action. She also regularly leads trials in antitrust matters, including securing a sweeping defense jury verdict—affirmed by the Eighth Circuit—for C&S Wholesale Grocers in an antitrust class action involving nearly $1 billion in alleged damages.
Luna maintains an active pro bono practice focused on constitutional and civil-rights litigation. She secured a landmark victory before the North Dakota Supreme Court enjoining enforcement of a statewide abortion ban, prevailed in a federal constitutional challenge to an Arizona statute under the First and Fourteenth Amendments, and obtained a complete win after a weeklong bench trial in a Hague Convention matter.
Luna is a co-leader of AsianAttorneys@Weil and is active in the Asian American Bar Association of New York. She previously served on Law360’s Trials Editorial Advisory Board. Before joining Weil, she clerked for the Honorable Richard M. Berman of the U.S. District Court for the Southern District of New York. She received her J.D. from the University of California, Hastings College of the Law, and her B.A. from the University of California, Santa Cruz.
Representative Matters
Antitrust
- Representing a class of professional tennis players in an antitrust action against the Grand Slams and the men’s and women’s professional tennis tours.
- Obtaining a sweeping defense jury verdict, subsequently affirmed by the Eighth Circuit, in an antitrust class action brought against C&S Wholesale Grocers involving nearly $1 billion in alleged damages.
- Securing dismissals of three antitrust and RICO actions against United Therapeutics Corporation concerning Medicare reimbursement programs.
- Successfully representing Visa International in a competitor antitrust lawsuit involving fee and routing practices.
- Winning an Eleventh Circuit victory for Farmers Insurance in an industry-wide antitrust multidistrict litigation.
- Representing ArcelorMittal USA as plaintiff trial counsel in a multi-district litigation asserting antitrust claims against two major Class I railroads.
- Representing The Kroger Company in merger-related antitrust litigation in federal and state courts concerning its proposed merger with Albertsons.
- Representing GrubHub in an antitrust class action alleging that defendants used dominant market positions to require restaurants to charge higher consumer prices.
Complex Commercial & International Litigation
- Defending a major, UK-based publicly traded company in litigation brought by its board of directors involving significant commercial and governance issues.
- Representing Altria in significant post-judgment proceedings relating to patent litigation.
- Securing a decisive post-trial victory for Serta Simmons Bedding following a five-day bench trial, facilitating the company’s emergence from chapter 11.
- Obtaining a complete arbitration victory for a major e-commerce company in a nine-figure dispute following a five-day evidentiary hearing.
- Winning a complete defense jury verdict for Johnson & Johnson in the talc mass tort litigation following a four-week jury trial.
- Successfully defending Sasol Limited in a $200 million securities class action alleging misstatements related to major capital projects.
- Advising Core Scientific, Inc. on litigation matters critical to the company’s emergence from chapter 11.
- Serving as trial counsel for Nexa Equity, Leap LLC, JobProgress, and Double D Construction in a federal trade secrets action.
Pro Bono
- Securing a landmark victory before the North Dakota Supreme Court enjoining enforcement of a statewide abortion ban.
- Prevailing in a federal constitutional challenge to an Arizona statute as violating the First and Fourteenth Amendments.
- Obtaining a complete victory after a weeklong bench trial in a Hague Convention international child abduction matter.
Awards and Recognition, Firm News & Announcements, Latest Thinking
Awards and Recognition
- Luna Barrington Named Among the Lawdragon 500 “Leading Litigators in America” Award Brief — Lawdragon
- Luna Barrington Recognized as a “Leading Lawyer” for Litigation: General Commercial in New York Award Brief — Chambers USA 2025
- Luna Barrington Named to “40 & Under List” Award Brief — Benchmark Litigation (2023-2025)
- Luna Barrington named to Lawdragon 500’s list of “Leading Litigators in America” in 2022 and 2023 Award Brief — Lawdragon
- Luna Barrington Named a “Rising Star” for Trials Award Brief — Law360
Firm News & Announcements
- Thirty-Nine Weil Partners Named to 2026 Lawdragon 500 Leading Litigators in America Firm Announcement — September 09, 2025
- Benchmark Litigation Names Four Weil Partners to 40 & Under List for 2025 Firm Announcement — August 13, 2025
- The PTPA and Tennis Players File Historic Legal Actions Against Governing Bodies Exposing Corrupt, Illegal, and Abusive System Press Release — March 18, 2025
- Twenty-Seven Weil Partners Named to 2025 Lawdragon Leading Litigators in America List Firm Announcement — September 25, 2024
- Benchmark Litigation Names Five Weil Partners to 40 & Under List for 2024 Firm Announcement — August 09, 2024
Latest Thinking
- Against All Odds—How to Try, and Win, High-Leverage Cases Publication — New York Law Journal — By Luna Ngan Barrington and Katheryn Maldonado — December 13, 2024
- Making the Most of Your Mock Jury Exercise Publication — Bloomberg Law — By David J. Lender, Luna Ngan Barrington and Sarah Ryu — PDF — June 14, 2024