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
Speaking Engagements, Latest Thinking, Firm News & Announcements
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
- Litigation Trends 2025 Publication — By Weil’s Litigation Department — May 22, 2025
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Protected: WorthWeil By The Numbers: Closing Your Complex Global Deal 2025
Blog Post — WorthWeil Antitrust Blog
— By
Jenine Hulsmann,
Chris Chapman,
Mehjabin Ahmed and
Jayati Handa
— May 06, 2025
There is no excerpt because this is a protected post. ...
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Can’t take my AIs off you: The CMA’s review of AI partnerships
Blog Post — WorthWeil Antitrust Blog
— By
Jenine Hulsmann,
Chris Chapman and
Lucy Chambers
— April 15, 2025
On 15 April 2025, the UK Competition and Markets Authority (“CMA”) published its long-awaited decision on the Microsoft / OpenAI partnership, marking the end of a cycle of five merger investigations launched into partnerships between AI developers and big tech companies since December 2023. The Microsoft / OpenAI case potentially marks a turning point in ...
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Don’t fake it ‘til you make it: The CMA’s enhanced consumer enforcement powers
Blog Post — WorthWeil Antitrust Blog
— By
Nafees Saeed,
Lucy Chambers and
Jayati Handa
— April 07, 2025
On 6 April 2025, significant new direct consumer protection powers for the UK’s Competition and Markets Authority (CMA) came into force. With the CMA having set out its early enforcement priorities and approach, in this post we explore what the new regime means for consumer-facing businesses in the UK and strategies to ensure compliance. New ...
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Catch me if you can: what next for EU merger policy towards below threshold transactions?
Blog Post — WorthWeil Antitrust Blog
— By
Niklas Maydell,
Annagiulia Zanazzo,
Chris Chapman and
Clémence Coppin
— March 14, 2025
On 10 January 2025, Nvidia brought an action against the European Commission (“EC”)’s decision to review Nvidia’s acquisition of Run:ai, following a referral request from the Italian competition authority under Article 22 of the EU Merger Regulation (“EUMR”). The deal failed to meet both the EUMR and the Italian merger thresholds, and was ‘called in’ ...
Firm News & Announcements
- Jenine Hulsmann and Brianne Kucerik Featured in Global Competition Review’s 2025 “Women in Antitrust” Firm Announcement — May 23, 2025
- Weil’s 2025 Litigation Trends Report Firm Announcement — May 22, 2025
- Weil Advises General Atlantic’s BeyondNetZero Fund on Investment in Wireless Logic Deal Brief — May 16, 2025
- Weil Helps Regeneron Secure Landmark $407M Antitrust Jury Trial Victory in Competitor Dispute Regarding Biotech Innovation Deal Brief — May 15, 2025
- Weil Advises Blackstone on Investment in Entrata Deal Brief — May 15, 2025
- Weil Advises KLAR Partners on the Acquisition of Ventro Group Deal Brief — May 12, 2025