
The growing antitrust practice at Milbank boasts a merger control team experienced in managing international merger clearance mandates, and draws on the strength of its antitrust litigation experts. The group has notable expertise in the energy, pharmaceuticals, healthcare, and financial services industries, representing clients in merger investigations before the Department of Justice, FTC, European Commission, and member states. Fiona Schaeffer heads the practice from New York, with expertise in the full spectrum of antitrust issues and notable experience handling emerging AI and ESG related issues. In Washington DC, Adam Di Vincenzo focuses his practice on representing clients in government reviews of mergers, often representing private equity sponsors and their portfolio companies. Also in DC, Richard Parker is recommended for both advisory and trial expertise, and James Weingarten joined the team in June 2024, a former FTC Chief Trial Counsel.
Legal 500 Editorial commentary
- Profile
Key clients
- United States Steel Corporation
- SLB (f/k/a Schlumberger)
- SEACOR Holdings
- Veritas Capital
- Hartree Partners
- Molina Healthcare
Work highlights
- Representing US Steel in its high-profile $14.9 billion merger with Nippon Steel Corporation.
Lawyers
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
Fiona Schaeffer
Other key lawyers
Adam Di Vincenzo; Daniel Rosenthal; Richard Parker; Grant Bermann; Jennifer Fauver; James Weingarten