The One-Day Cup group stages concluded with Lancashire, Nottinghamshire, Yorkshire and Durham joining already-qualified group leaders Leicestershire and Middlesex in the knockout phase. The results brought several standout individual performances and confirmed the exit of defending champions Worcestershire, setting up the quarter-finals after a day of high-scoring cricket.

Lancashire secured their spot with a record 443-6 against Somerset at Taunton, built on centuries from Keaton Jennings (156) and teenager Rocky Flintoff (123), before bowling Somerset out for 269. Nottinghamshire took the final Group A place by chasing down Surrey's 298-8 at the Oval, powered by George Munsey's 138 and support from Haseeb Hameed and Kyle Verreynne. In Group B, Middlesex topped the table thanks to Joe Cracknell's maiden white-ball century, securing their first home semi-final in List A cricket since 1990, with Yorkshire and Durham also progressing.