With expertise acting for both plaintiff and defendant, Simpson Thacher & Bartlett LLP is highly regarded in antitrust litigation, government investigations, and merger clearance matters. The team has a demonstrable capability to resolve cases involving monopolization, price-fixing, and tying claims. Peter Guryan co-chairs the antitrust and trade regulation practice from New York. Co-chair Sara Razi has secured favorable outcomes in complex mergers and high-profile antitrust litigation. Based in Washington, D.C., co-chair John Terzaken plays a pivotal role in handling antitrust, fraud, and white-collar crime matters, as well as related follow-on litigation. Abram Ellis manages a diverse portfolio encompassing complex antitrust litigation and merger clearances for domestic and international corporations. All lawyers are based in Washington DC, unless otherwise noted.
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Testimonials

Collated independently by Legal 500 research team.

  • ‘Simpson possesses very good lawyers; they are responsive and collaborative, and always good to have on the team.’
  • ‘The Simpson team is extremely knowledgeable and provides excellent client service. We are very happy to work with this team and have tremendous confidence in their ability to deliver great results in challenging cases.’
  • ‘John Terzaken is a great first-chair lawyer. He is responsive and pleasant to deal with, and he inspires a lot of confidence in our most senior executives.' 
  • ‘Josh Hazan is a rising star in Simpson's antitrust practice. He is a master of complex data and a strong analyst of difficult legal issues.’

Key clients

  • Booking Holdings
  • Covestro
  • Deutsche Bank
  • HCA Healthcare
  • JPMorgan
  • Marinette Marine Corporation
  • Mattress Firm Group
  • RPM International
  • Skai
  • The Euclid Chemical Company

Work highlights

  • Acted for Marinette Marine in dismissal of an antitrust class action.
  • Acted for Deutsche Bank in securing dismissal in antitrust class action surrounding European government bonds.
  • Advising HCA Healthcare in a class action lawsuit alleging the use of anticompetitive tactics.

Lawyers

Next generation partners

Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.

Abram Ellis

Practice head

Peter Guryan; Sara Y. Razi; John Terzaken

Other key lawyers

Abram Ellis