Winx is a retired champion Australian Thoroughbred racehorse. She won 37 of 43 career starts, including, between May 2015 and her retirement in April 2019, her last 33 races in succession, including 25 Group 1s, at distances ranging from 1300 metres to 2200 metres. In the World's Best Racehorse Rankings, she was the second-ranked filly or mare in 2015, improving in 2016 to become both the world's top-ranked filly or mare and the world's top-ranked turf horse. She retained this ranking in 2017 and in 2018 was co-ranked as the best horse in the world. In 2017 she was inducted into the Australian Racing Hall of Fame, only the third horse to earn this honour while still in training. Over her career, she earned more than 26 million Australian dollars.

The Australian Racing Hall of Fame is part of the Australian Racing Museum which documents and honours the horseracing legends of Australia. The museum officially opened in 1981 and created the Hall of Fame in 2000.