SuperGroup chief operating officer Diane Savory is to stand down after 20 years at the business.
Savory said she was leaving for personal reasons and will depart on May 6.
The retailer said Savory had contributed greatly to the young fashion business’ success and played a crucial role in preparing for its flotation last year.
SuperGroup chief executive Julian Dunkerton said: “We fully respect and understand Diane’s decision. It has been a pleasure to work with her over the last 20 years and I know she will remain passionate about the company and its future.”