Weil, Gotshal & Manges LLP continues to secure landmark victories across pharmaceutical antitrust litigation, environmental and consumer protection suits, copyright and greenwashing class actions, and multibillion-dollar energy and M&A disputes. The global litigation department is headed by David Lender in New York, acclaimed for his trial advocacy in commercial, antitrust, and intellectual property matters, and Drew Tulumello in Washington DC, who excels in commercial and class action litigation. As co-heads of the firm’s complex commercial litigation practice, New York’s Gregory Silbert and Silicon Valley’s David Singh further enhance the practice’s capabilities. In Miami, Pravin Patel and Nicole Comparato are leading figures in product liability, restructuring and breach of contract actions. Adding further depth, New York’s Diane Sullivan is accomplished in product liability, mass tort, and commercial disputes, while DC’s Chantale Fiebig is notable in multi-jurisdictional commercial and antitrust litigation. The practice strengthened its litigation platform in 2025 with several high-profile additions: ‘master of her craft’ Nili Moghaddam joined in May, followed by Bo Pearl and Adam Fee in September, and Adam Gershenson in October.
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Testimonials
Collated independently by Legal 500 research team.
- 'The overall team of advisors brings a client a set of resources that is unmatched in nearly every field of advice we need.'
- 'The entire team is fantastic to work with.’
- ‘Weil is particularly strong in litigation. They have talented lawyers who can fight a lawsuit until the very end, as necessary.'
- ‘Smart, business-savvy team.’
- ‘Nili Moghaddam is great. Really strong, master of her craft. But also, very practical as a former general counsel. Highly recommend.’
- ‘The critical quality at Weil are the partners. We have worked with Pravin Patel who has been an invaluable advisor and trusted voice.’
Key clients
- Regeneron Pharmaceuticals
- PepsiCo
- ExxonMobil
- Apple
- SiriusXM
- Pandora
- Warner Bros. Discovery
- Professional Tennis Players Association
- lululemon athletica
- L’Oreal, S.A.
- Paramount Skydance
- Chobani
Work highlights
Delivered a blockbuster $407m jury verdict for Regeneron Pharmaceuticals in a high-profile antitrust case involving cholesterol-lowering drugs. The win reverberated across the pharmaceutical industry for the sheer size of the award and reinforced protections for biotech innovation and access to life-saving treatments.
Won a decisive dismissal of PepsiCo in a novel lawsuit, alleging that PepsiCo, and several of the nation’s most iconic food manufacturers, intentionally designed and marketed so-called “ultra processed” foods (UPFs) to be addictive to children, causing chronic diseases. This “first-of-its-kind” case is expected to test novel legal theories that could shape future decisions and open the door to a wave of similar cases against food manufacturing companies worldwide.
Secured a landmark victory for Sirius XM Radio, securing a precedent-setting dismissal in a highly publicized litigation filed by SoundExchange over Sirius XM’s royalty calculations. This remarkable win, involving more than $150m+ in disputed royalties, is poised to reshape copyright enforcement and foster a more cooperative regime for resolving disputes.
Lawyers
Hall of Fame
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Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Practice head
David Lender; Drew Tulumello; Gregory Silbert; David Singh
Other key lawyers
Pravin Patel; Nicole Comparato; Diane Sullivan; Chantale Fiebig; Nili Moghaddam; Bo Pearl; Adam Fee; Adam Gershenson; Jennifer Crozier Brooks; Bambo Obaro; Brian Liegel