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 “Litigation Department of the Year, Antitrust” Award Brief — National Law Journal Legal Awards 2025
- 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
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
- FTC Rebrands Zillow–Redfin Partnership as a “Pay‑to‑Exit” Deal Blog Post — WorthWeil Antitrust Blog — By Jasmine Rosner — October 14, 2025
- FTC Walks Away from Rulemaking— But Not the Fight on Non-Competes Alert — By Kristin Sanford, John P. Barry, Celine Chan, Geneva Torsilieri Hardesty and Mia Smutny — PDF — September 17, 2025
- Protected: EU Merger Guidelines Review: Responses are in Blog Post — WorthWeil Antitrust Blog — By Niklas Maydell, Jenine Hulsmann, Chris Chapman, Nicholas Barnabo, Lucy Chambers and Alexandra Zaytseva — September 10, 2025
- Weil's 2024 SCOTUS Term in Review Publication — By Zack Tripp, Robert B. Niles-Weed, Josh Wesneski, Sebastian Laguna, Anthony Kakoyannis, Joseph Nelson, Laurel L. Zigerelli and Natalie Komrovsky Trujillo — PDF — September 04, 2025
- 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
Firm News & Announcements
- Weil Advises Convex Insurance and PSP Investments on Convex’s New Long Term Ownership Structure Led by Onex Corporation and American International Group, Inc. Deal Brief — October 30, 2025
- Weil Advised American Securities and FleetPride in Merger of FleetPride and TruckPro Deal Brief — October 28, 2025
- Weil Advised Motive Partners in its Strategic Investment in Electric Mind Deal Brief — October 28, 2025
- Weil Advised PSG on Inktavo’s Acquisition of OrderMyGear Deal Brief — October 21, 2025
- Weil Advised PSG on ThreatConnect’s Sale to Dataminr Deal Brief — October 21, 2025
- Weil Advises MGM Resorts in $546M Sale of MGM Northfield Park to Clairvest Group Deal Brief — October 16, 2025
 
         
         
         
        