Punctilous is a British Thoroughbred racehorse and broodmare. Bred in England by Björn Nielsen she showed very promising form as a juvenile in 2003, winning her first two starts before finishing third in the Fillies' Mile. In the following year she developed into a top-class middle distance performer, winning the Musidora Stakes and the Ribblesdale Stakes as well as finishing second in the Irish Oaks and the E. P. Taylor Stakes, third in The Oaks and fourth in the Yorkshire Oaks. In 2005 she made little impact in her first two starts but then won the Chalice Stakes before recording her biggest victory in the Yorkshire Oaks. She was retired from racing at the end of the year to become a broodmare.