King & Spalding litigates high-stakes appeals before various federal circuits and the US Supreme Court. While its primary hub is Washington DC, the firm maintains a significant California presence and a prominent Florida team that has won more than 30 appellate cases in the state over the past decade. Jeffrey Bucholtz co-leads the practice and is recognized for his life sciences expertise, recently representing Zyla Life Sciences in a successful Fifth Circuit reversal. He shares leadership with administrative law expert Ashley Parrish , who is steering multi-circuit challenges to federal drug pricing regulations. Key regional contacts include Kelly Perigoe in Los Angeles and Miami-based Val Leppert . Matthew McGill joined in July 2025 from Gibson, Dunn & Crutcher LLP, having recently argued Supreme Court merits cases concerning procedural finality in arbitration and foreign sovereign immunity.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- ‘Ashley Parrish provides a combination of client service and engagement with ideas that shape and drive exceptional advocacy.’
Key clients
- Novo Nordisk
- American Clinical Laboratory Association
- AbbVie
- Chamber of Commerce of the United States
- Progressive Insurance
- Boehringer Ingelheim
- Silicon Ranch Corporation
- R.J. Reynolds
- NSO Group Technologies Limited
- Terumo
Work highlights
Represented Novo Nordisk and Boehringer Ingelheim in ongoing constitutional challenges across the Second and Third Circuits against the Inflation Reduction Act’s drug price control provisions.
Represented Progressive Insurance in a series of appeals across the country, successfully defeating class certification and reversing district court orders that had certified nationwide class actions.
Represented Boehringer Ingelheim in a Delaware Supreme Court victory reversing a lower court decision that would have allowed expert testimony from nearly 75,000 plaintiffs alleging the heartburn medication Zantac caused cancer. The court's July 2025 ruling reaffirmed rigorous gatekeeping standards for expert evidence in mass tort litigation.
Practice head
Jeffrey Bucholtz; Ashley Parrish
Other key lawyers
Paul Mezzina; Matthew McGill; Kelly Perigoe; Amy Upshaw; Val Leppert