
White & Case LLP‘s M&A group leverages the firm’s deep strength on the bench to advise on a range of complex, high-value, cross-border M&A transactions, with particular strength in the energy, retail, technology and financial services sectors. Team co-head Michael Deyong is sought out by a number of high-profile energy and telecoms clients, while co-head Kimberly Petillo-Décossard is well-versed in advising both private and publicly-listed companies on transactions. John Reiss is a seasoned M&A lawyer with considerable expertise in advising both strategic corporate transactions as well as private equity deals. Gregory Pryor is recommended for his proficiency in handling complex matters in the retail, mining and oil and gas sectors. All team members mentioned above are located in New York.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- ‘The team has a deep understanding of the client needs and goals. They come up with creative solutions to meet those goals. They have a wide network across many global jurisdictions that is helpful with multinational deals.’
- ‘Kimberly Petillo-Décossard has deep experience across both public and private M&A and provides helpful, actionable advice.'
Lawyers
Hall of Fame
The lawyers at the very top of the profession, widely known and respected by peers and clients for their longstanding involvement in market-leading work.

Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Keith Hallam
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Jalpit Amin
Practice head
Michael Deyong; Kimberly Petillo-Décossard; Jarlath McGurran
Other key lawyers
John Reiss; Gregory Pryor; Ross Sturman; Trevor Currie; Keith Hallam
