WilmerHale is a 2025 Law360 Appellate Practice Group of the Year, in recognition of the firm’s impressive string of decisive appellate victories in some of the most complex, high‑stakes and precedent‑setting matters before the US Supreme Court, federal courts of appeals and state supreme courts.  

Law360 highlighted WilmerHale’s appellate practice for its ability to combine deep subject‑matter expertise with strategic advocacy, integrating appellate considerations early in litigation to shape legal outcomes and advance the development of the law.  

The appellate recognition follows Law360’s broader designation of WilmerHale as a 2025 Firm of the Year, reflecting the firm’s strength across multiple practice areas including Appellate, Class Action, Compliance, Intellectual Property and Trials and its record of impactful litigation victories throughout 2025. 

“Our appellate practice is built on close collaboration with trial teams and a focus on the legal issues that will ultimately determine the outcome of a case,” said Mark Fleming, co‑chair of WilmerHale’s Appellate and Supreme Court Litigation Practice. “That approach allows us to position our clients for success not just in a single appeal but across the full life of a dispute.” 

WilmerHale was recognized for advising clients in a range of significant appellate matters including: 

• PNC Bank, in defeating more than $500 million in patent infringement jury verdicts through coordinated appellate and Patent Trial and Appeal Board proceedings, with the Federal Circuit ultimately invalidating the asserted patents.
• Apple, in securing a Federal Circuit decision vacating a $300 million patent infringement verdict based on jury instructions that violated Apple’s right to a unanimous verdict.
• Richard Glossip, in a landmark pro bono US Supreme Court decision holding that prosecutors violated his due process rights in a capital case after admitting to withholding evidence and presenting false testimony.
• Biofuel producers, in a US Supreme Court victory resolving where challenges under the Clean Air Act must be heard, bringing greater clarity and consistency to the administration of federal environmental regulations.
• Marilyn Mosby, former Baltimore City State’s Attorney, in overturning a mortgage fraud conviction on appeal, with the Fourth Circuit finding that the jury had been improperly instructed on venue. 

WilmerHale’s Appellate practice draws on one of the deepest appellate benches in the market including former Supreme Court clerks and former senior government officials. It works seamlessly across the firm’s offices to handle appeals involving constitutional law, administrative law, intellectual property, antitrust, securities and complex commercial disputes. 

Read WilmerHale’s full Appellate Practice Group profile in Law360.