WilmerHale

WilmerHale‘s ’premier appellate and Supreme Court practice’ is frequently sought out for its ability to handle intricate appeals and regulatory issues. The team provides strategic depth across diverse sectors including antitrust, financial regulation, IP, and constitutional law, often advising other legal teams on their most critical appellate matters. The group is particularly prominent in the Federal Circuit, where it maintains a consistent schedule of arguments in patent and administrative law disputes. Operating from Washington DC, practice co-chair Seth Waxman brings the experience of a former US Solicitor General and has appeared before the US Supreme Court more than 85 times. Fellow practice co-chair Mark Fleming is based in Boston and focuses on patent and constitutional law, recently winning three Federal Circuit cases in one week that vacated $523m in judgments. In Washington DC, practice vice chair Daniel Volchok recently secured an Eighth Circuit victory in a multimillion-dollar mineral rights dispute involving sovereign immunity and challenged the constitutionality of a 20-year FTC cease-and-desist order in the Fifth Circuit. Also in Washington DC, Thomas Saunders handles patent and government contract disputes, while Ari Holtzblatt represents tech and media companies in appeals involving consumer class actions, due process, and antitrust claims. The practice further strengthened its West Coast presence with the October 2025 arrival of former California Solicitor General Michael Mongan in San Francisco.