
Antitrust: Mainly Plaintiff
USA Guide 2026 : New York
Rankings

Ranked Individual
Ranked Individual
About
Provided by Constantine Cannon LLP
For over 30 years, Constantine Cannon has been a preeminent antitrust firm focused on litigating “change-the-industry” cases. We have achieved record-setting results for our clients and have reformed industries to promote competition and benefit the public, including three of the largest known private antitrust settlements in U.S. history. We also have substantial experience defending against antitrust claims.
We recently represented and settled the claims of more than 60 merchants and trade associations seeking reform of Visa’s and Mastercard’s anti-competitive rules and seeking substantial damages from supra-competitive prices (so-called “interchange fees”) imposed on merchants. Our clients included some of the largest corporations in the world, including Amazon, Booking Holdings, Costco, Dick’s Sporting Goods, IKEA, NIKE, Ralph Lauren Corp., Starbucks, The Gap, and Yum! Brands.
The firm also recently settled a landmark antitrust class action where it represented millions of businesses and individuals alleging that Sutter Health, one of the largest health systems in California, illegally tied together different hospitals’ services and imposed unreasonable trade restraints to charge health plans higher prices, which led to higher health-insurance premiums. In the healthcare sector, we also represent CVS in its multi-billion-dollar antitrust claims in In re Generic Pharmaceuticals Antitrust Litigation.
Industries (6)
- Biotech & Pharmaceuticals
- Digital Platforms & E-Commerce
- Electronic Payments
- FinTech & Financial Services
- Healthcare
- Government Procurement
Chambers Review
Provided by Chambers
Work Highlights
Provided by Chambers
Constantine Cannon LLP represents CVS in connection with its multi-billion dollar claim in the Generic Pharmaceuticals Antitrust Litigation.
Strengths
Provided by Chambers
Constantine Cannon are tenacious in their representation.
Antitrust: Mainly Plaintiff respondentUSAConstantine Cannon are truly fierce advocates and very good subject matter experts.
Antitrust: Mainly Plaintiff respondentUSA
Notable Practitioners
Provided by Chambers
Band 3 
Band 3 
Ankur Kapoor
Ankur Kapoor has notable experience in antitrust cases. He often handles plaintiff-side representation in class action litigation. He has a very level head and is passionate about antitrust.
Antitrust: Mainly Plaintiff respondentUSAAnkur in particular is an exceptional attorney, he is poised, calm and extremely well organized and personable.
Antitrust: Mainly Plaintiff respondentUSA
Ranked Individuals at Constantine Cannon LLP (1)
Members
Provided by Constantine Cannon LLP

Taline Sahakian
Head of Department

Owen Glist

Jean Kim

Alysia Solow

Seth D. Greenstein

Lloyd Constantine

W. Stephen Cannon

Richard Aborn

Gary J. Malone

Robert L. Begleiter

Jan Friedman Constantine

Dan Vitelli

Allison Sheedy

Ankur Kapoor

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