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 Shortlisted for “Antitrust Firm of the Year” Award Brief — LMG Life Sciences 2025
- Weil’s Work on Novartis Pharma et al v Regeneron Pharmaceuticals Named “Litigation of the Year – Non-Cartel Prosecution” Award Brief — GCR Awards 2025
- Weil Ranked a Top Firm for Civil Litigation / Class Actions: Defense Award Brief — Legal 500 US 2025
- Weil Ranked a Tier 1 Firm for Merger Control Award Brief — Legal 500 US 2025
- Weil Named “Outstanding” Practice in Washington, DC Award Brief — Global Competition Review 2025
Speaking Engagements
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Antitrust Enforcement Under the Trump Administration – The First 100 Days: Reading Between the Headlines & What Lies Ahead
Speaker(s):
Meagan Bellshaw,
Jasmine Rosner and
Mark Seidman
May 8, 2025 — Weil Antitrust partners Meagan Bellshaw, Jasmine Rosner, and Mark Seidman hosted a webcast discussing the antitrust enforcement landscape over the first 100 days of President Trump's second administration and predictions on what to expect in the future.
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The Revival of the Robinson-Patman Act: Understanding the New Landscape
Speaker(s):
Yehudah L. Buchweitz
May 1, 2025 — New York, NY — Complex Commercial Litigation partner Yehudah L. Buchweitz led a discussion titled “The Revival of the Robinson-Patman Act: Understanding the New Landscape” at Practising Law Institute’s 2025 Developments in Antitrust Law & Regulation conference. Yehudah discussed the history of the Robinson-Patman Act, key considerations in bringing and defending against a Robinson-Patman Act claim, and understanding new enforcement actions by the Federal Trade Commission.
Latest Thinking
- The EU Foreign Subsidies Regulation: the first two years under review Blog Post — WorthWeil Antitrust Blog — By Niklas Maydell, Chris Thomas and Chris Chapman — August 21, 2025
- Minority Investments, Major Risks: European Commission fines Delivery Hero and Glovo Blog Post — WorthWeil Antitrust Blog — By Jenine Hulsmann, Mark Seidman, Luca Montani and Spencer Talbot — July 10, 2025
- Fixing the Fixes? Approach to Merger Remedies Changing Under New Political Regimes Blog Post — WorthWeil Antitrust Blog — By Mark Seidman and Annagiulia Zanazzo — June 25, 2025
- The Robinson-Patman Act: The Revival of a Controversial Law From the Dustbin of History? Publication — The National Law Journal — By Yehudah L. Buchweitz, Dan J. Nadratowski, Charles Gehnrich and Arlinda Shehu — June 13, 2025
- FTC and DOJ Signal Shift in Merger Review and Remedies Alert — Antitrust — By Mark Seidman and Martin Wagner — PDF — June 10, 2025
Firm News & Announcements
- Weil Advises Foundation Building Materials, American Securities LLC and Clayton Dubilier & Rice LLC in FBM’s $8.8 Billion Sale to Lowe’s Companies, Inc. Deal Brief — August 20, 2025
- Weil Advises Advent in its Acquisition of Coherent’s Aerospace and Defense Business Deal Brief — August 15, 2025
- Weil Advises Bain Capital on the Investment in HSO Deal Brief — August 15, 2025
- Weil Advises Quad-C in its Investment in O6 Environmental Deal Brief — August 14, 2025
- Weil Advises Iodine Software in $1.25B Sale to Waystar Deal Brief — July 24, 2025
- Weil Advises the Private Equity Business at Goldman Sachs Alternatives in Acquisition of a Majority Stake in NAVEX Deal Brief — July 21, 2025