Kathryn Kayali joined Williams & Connolly in 2016 after clerking for Judge Richard G. Taranto of the U.S. Court of Appeals for the Federal Circuit. 

Kathryn’s practice is focused on patent litigation, particularly in the pharmaceutical sector, and her experience includes litigation concerning both small-molecule and biologic drugs. She has experience handling pharmaceutical patent cases at every stage of litigation, from complaint through trial.

Kathryn's practice has been recognized by legal publications. Most recently, Kathryn was named a 2026 Law360 "Rising Star." In 2025 and 2026 she was named to Benchmark Litigation's list of "40 Under 40." 

Kathryn received her law degree from Harvard Law School in 2014, where she served as Submissions Co-Editor of the Harvard Journal of Law & Technology. Before law school, Kathryn graduated cum laude from Yale University with honors in the major of Molecular, Cellular, and Developmental Biology, and then earned her Master’s degree in Molecular and Cell Biology from the University of Texas at Dallas.