Established on 3 June 2000 by Nick Robertson, Andrew Regan, Quentin Griffiths and Deborah Thorpe, the company listed on London's AIM in 2001 and dropped the full 'AsSeenOnScreen' name in 2003. Aimed at young adults, it now stocks over 850 brands alongside its own label and ships from fulfilment centres in the UK, US and Europe to all 196 countries, with headquarters in London's Camden Town.
In 2021 ASOS acquired the Topshop, Topman, Miss Selfridge and HIIT brands out of Arcadia's administration, then sold a 75% stake in Topshop and Topman to Denmark's Bestseller in 2024. Its largest stakeholder is Frasers Group, with Bestseller's Anders Holch Povlsen also holding a major share.