Antitrust
Notable Representations, Key Contacts
Weil’s global Antitrust team provides clients with the international reach and extensive expertise required to handle complex and rapidly shifting antitrust and foreign investment rules around the world. Our team has a proven track record of achieving successful and innovative outcomes for clients across the full range of transactional and behavioral antitrust and foreign investment matters.
“An exceptional group of attorneys with deep experience representing clients before government agencies.”
Antitrust M&A:
With our deep experience in handling complex cross-border merger review processes and our position at the forefront of shaping antitrust policy, Weil has been trusted to provide effective global strategic counseling, agency representation, and litigation defense for many of the largest, highest-profile transactions in recent years.
Antitrust Litigation:
Weil has a strong reputation for successfully defending clients in their most high-stakes civil and criminal antitrust litigations, achieving the best outcomes at trial and on appeal in respect of the full range of cutting-edge antitrust issues, with particular success in class action litigations.
Cartels & Investigations:
With our deep expertise and global reach, Weil is regularly called upon by clients across the globe to guide them through all phases of criminal and civil cartel investigations. We have consistently obtained favorable results, earning the practice recognition among the top cartel defense firms in the world.
Global Recognition
50
Awards and Recognition, Speaking Engagements, Latest Thinking, Firm News & Announcements
Awards and Recognition
- Weil Named a "Leading" Firm for Competition/Antitrust (international & cross-border) - USA Award Brief — Chambers Global 2026
- Weil Named a "Leading" Firm for Antitrust: Cartels - USA Award Brief — Chambers Global 2026
- Weil Named a "Leading" Firm for Competition/Antitrust - USA Award Brief — Chambers Global 2026
- Weil Named a "Leading" Firm for Competition/Antitrust - Global: Multi-Jurisdictional Award Brief — Chambers Global 2026
- Weil Named “Litigation Department of the Year, Antitrust” Award Brief — National Law Journal Legal Awards 2025
Speaking Engagements
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Mergernomics: How Tariffs Redefine Product Markets
April 6, 2026 — Weil Antitrust counsel Carla Hine spoke on the ABA Antitrust Law Section podcast, Trust and Trade, with economist Dr. Craig Malam joining host Anant Raut to discuss the effect of the Trump Administration's tariff-centric trade policy on how we determine the edges of a product market and what constitutes a substitutable product.
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Hybrid Relationships: Cartel or Collaboration?
Speaker(s):
Adam C. Hemlock
March 25, 2026 — Weil Antitrust partner Adam Hemlock moderated a panel at the ABA Antitrust Spring Meeting discussing recent cases, enforcement trends, and tips for counseling clients in this complex area.
Latest Thinking
- A Merger Plot Twist: DOJ Credits Paramount/Warner Bros. With Boosting Competition Blog Post — WorthWeil Antitrust Blog — By Megan A. Granger, Mark Seidman, Caren N Andrango Espin and Melissa Bredbenner — June 15, 2026
- Tighter Borders, Higher Stakes: The EU’s Revamped FDI Regulation and the Draft Industrial Accelerator Act Blog Post — WorthWeil Antitrust Blog — By Niklas Maydell, Álvaro Salgado and Matthew Fader — June 09, 2026
- Catch me if you can (Part II) – below-threshold merger enforcement in the EU continues to evolve Blog Post — WorthWeil Antitrust Blog — By Niklas Maydell, Annagiulia Zanazzo, Chris Chapman and Bahawal Ali — May 15, 2026
- Scale on up! The European Commission publishes its revised Merger Guidelines Blog Post — WorthWeil Antitrust Blog — By Niklas Maydell, Jenine Hulsmann, Chris Chapman, Lucy Chambers, Nicholas Barnabo, Martin Wagner, Venetia Hudd, Nya Gavin and Viveka Patel — May 01, 2026
- The Next Chapter in the Non-Compete Saga: FTC Enforcement Brings the Contours into Focus Blog Post — WorthWeil Antitrust Blog — By Mark Seidman, John P. Barry, Celine Chan and Katya Dajani — April 29, 2026
Firm News & Announcements
- Weil Alongside PedersoliGattai Advises Advent International on the Sale of Irca to CVC Deal Brief — June 29, 2026
- Weil Advises Quad-C in its Investment in Armstrong Transport Group Deal Brief — June 25, 2026
- Weil Lawyers Recognized in Best Lawyers in Germany™ 2027 Edition Firm Announcement — June 22, 2026
- Weil Advises Yum! Brands in $2.7B Sale of Pizza Hut to LongRange Capital and Yum China Holdings Deal Brief — June 16, 2026
- Weil Advises Fox Corporation in its $22B Acquisition of Roku, Inc. Deal Brief — June 15, 2026
- Thirty-Five Weil Partners Named to 2026 Lawdragon 500 X – The Next Generation Firm Announcement — June 12, 2026