Lisl J. Dunlop

Partner

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Practice Areas

Antitrust

Lisl Dunlop brings over 30 years of antitrust experience, helping her clients navigate the complex challenges around mergers, acquisitions, joint ventures, and agency investigations. She focuses on helping clients align their strategic initiatives with antitrust risk, providing practical solutions that move their businesses forward.

Lisl J. Dunlop

Partner

New York

Contact

Practice Areas

Antitrust

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Recognized as a leading antitrust practitioner by international legal rankings, such as Chambers USA, The Legal 500 United States, and Crain’s New York Business, Lisl provides a global perspective to approaching antitrust aspects of transactions, litigation strategy, and government investigations. Drawing from her experience practicing in Australia, the UK, as well as the U.S., she represents clients before U.S. federal and state antitrust agencies as well as international authorities, ensuring they stay compliant while achieving their goals.

Lisl works with clients across industries, including technology, media, and healthcare. Her healthcare practice is particularly robust, advising companies on how to manage antitrust risks in areas like hospital affiliations, joint ventures, accountable care organizations (ACOs), physician networks, and financial and clinical integration issues.

As an accomplished speaker and author, Lisl regularly shares insights on antitrust and competition law. She’s also actively involved in leadership roles within the New York State Bar Association and the American Bar Association’s Antitrust Law sections. Beyond her practice, she's committed to pro bono work, advocating for LGBTQ+ and indigent clients in immigration and asylum matters.

Experience

Representing the University of Pittsburgh Medical Center (UPMC) in its affiliation with Washington Health System.
Representing VMware, Inc., in its $69 billion acquisition by Broadcom Inc.
Represented Tufts Health Plan in its $8 billion merger with Harvard Pilgrim Health Care.
Represented Heart of Hospice in its acquisition by LHC Group Inc.
Represented Public.Resource.Org in its complaint to the Federal Trade Commission regarding public access to state laws.
Represented Tyson Foods Inc. in its $1.2 billion sale of its pet treats business to General Mills.
Represented Columbia Care in its acquisitions of The Green Solution and Green Leaf Medical.
Represented Textron Inc. in its pilot training joint venture with FlightSafety Inc.
Represented entrepreneur Peter Adderton and Boost International in connection with the Sprint/T-Mobile merger.
Represented Nashville Songwriters Association International in its amicus brief for United States v. Broadcast Music Inc., Second Circuit, 2017.

Honors

Chambers USA, New York: Antitrust (2010 – 2025)
The Legal 500 United States, Antitrust – Merger Control (2012 – 2014; 2022 – 2025)
Crain's New York Business, "Notable Women in Law" (2020)
Best Lawyers in America, Antitrust Law and Litigation: Antitrust (2020 – 2025)
Who’s Who Legal, Thought Leaders – Competition (2023 – 2024)
Who's Who Legal, Competition (2020 – 2024)
Profiles in Diversity Journal, "Women Worth Watching" (2022)
Lawdragon, “500 Leading Antitrust & Global Competition Lawyers” (2025)
Lawdragon, "500 Leading Dealmakers in America" (2024 – 2025)
Lawdragon, "500 Leading Lawyers in America" (2025)
Lawdragon, "500 Leading Litigators in America" (2023 – 2025)
Super Lawyers, New York Metro, "Top Women Attorneys" (2011 – 2022)
JD Supra, Readers' Choice Awards, "Top Author" (2017 – 2018)

Education

LLM – Cornell University Law School (1997)
LLB – University of Sydney (1991)
BSc – University of Sydney (1991)

Admissions

England and Wales
U.S. Supreme Court
U.S. Court of Appeals for the Second Circuit
U.S. District Court Eastern District of New York
U.S. District Court Southern District of New York
U.S. District Court District of Columbia

Quotes

Lisl is a trusted advisor - she is technically excellent but also commercial. She understands clients' needs and gives bespoke solutions for complex situations.

Chambers USA

Lisl's subject matter expertise and ability to learn clients' businesses quickly is very impressive. She is able to pivot and shift when faced with obstacles.

Chambers USA

Lisl is phenomenal on antitrust M&A counselling and has a very strong healthcare specialty.

Chambers USA

Lisl Dunlop is the consummate professional and that rare blend of extreme professionalism and knowledge coupled with a warm, caring demeanor and true, deep concern for the needs of her clients.

Best Law Firms

Lisl Dunlop wins commendations from peers across North America who consider her a go-to figure in the market for antitrust-related litigation and transactional matters.

Who's Who Legal

Lisl is a trusted advisor - she is technically excellent but also commercial. She understands clients' needs and gives bespoke solutions for complex situations.

Chambers USA

Lisl is a trusted advisor - she is technically excellent but also commercial. She understands clients' needs and gives bespoke solutions for complex situations.

Chambers USA

News & Insights

View all Insights

July 8, 2025

Chambers Merger Control 2025 Guide

Axinn partners Lisl Dunlop and Bradley Justus, along with associates Josh Jowdy and Sandhya Taneja, co-authored the “USA” chapter of the Chambers Merger Control 2025 Guide.

Byline Articles

Antitrust

June 27, 2025

State by State, Pre-Merger Notifications Expand

In the wake of the recent major revisions to the federal merger review form, states are also getting into the act, creating broad new...

Axinn Viewpoints

Antitrust

June 23, 2025

Wait, We Have To Tell Who? What You Need To Know About State Premerger Notifications

Axinn partner Lisl Dunlop joins hosts Alicia Downey and Rubin Waranch for an in-depth discussion on the growing wave of state-level transaction notification laws—often referred to as “mini-HSR laws.” With more state legislatures enacting or proposing legislation that requires parties to notify the state attorney general or other authorities of transactions involving material ownership changes, Lisl brings her deep antitrust experience to the table to unpack the drivers behind this trend and its impact on regulatory review.

Podcast

June 5, 2025

Axinn Earns Band 1 Recognition in Multiple Categories in 2025 Chambers USA Guide

Axinn is proud to announce that more than half of our partners have been ranked in the 2025 Chambers USA Guide – with recognition in three major markets including New York, California and District of Columbia. Several practitioners were recognized in multiple sub practice areas including Antitrust: Litigation Specialists and Antitrust: Cartel.

Awards & Recognitions

Antitrust

News & Insights

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