
Gibson, Dunn & Crutcher LLP fields a comprehensive merger control practice, advising major corporates and sports and technology organisations on complex, closely scrutinised transactions. The team works in close coordination with colleagues in Europe and beyond to steer multi-jurisdictional clearances for global deals. The practice is co-headed by Rachel Brass, Stephen Weissman and Cynthia Richman: San Francisco-based Brass boasts a strong track record in contested and cross-border matters, while in Washington DC Weissman regularly handles merger investigations before the FTC and DOJ, and Richman is a key port of call for clients in the tech sector, network industries and digital platforms space. Michael Perry, also based in DC, is frequently instructed on merger clearance in healthcare, life sciences, energy and technology.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Lawyer & team quality
Client satisfaction: Billing & efficiency
Client satisfaction: Sector knowledge
Client satisfaction: NPS ®
Key clients
- HPE
- Pioneer Natural Resources Company
- Edwards Lifesciences Corp.
- SES S.A.
- Nielsen
- Meta Platforms
- T-Mobile US, Inc.
- Hershey
- Arthur J. Gallagher Co.
Work highlights
Represented Hewlett Packard Enterprise (HPE) in connection with the DOJ’s suit to block HPE’s $14 billion acquisition of Juniper Networks.
Represented Pioneer Natural Resources, the largest producer of oil and natural gas in the Permian Basin, in seeking FTC approval for its sale to ExxonMobil.
Advised SES S.A. on its $3.1 billion acquisition of Intelsat, coordinating across the U.S., UK, and EU under Joshua Lipton’s leadership.
Lawyers
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.

Practice head
Rachel Brass; Cynthia Richman; Kristen Limarzi
Other key lawyers
Scott Hammond; Michael Perry
