ASOS was registered on 3 June 2000 as Winsupply plc and soon became AsSeenOnScreen Holdings. Nick Robertson, Andrew Regan, Quentin Griffiths and Deborah Thorpe founded it. Robertson was CEO from 2000 to 2015.
The first catalogue sold lookalikes of clothes from film and TV, including Brad Pitt's red leather jacket in Fight Club. The company listed on AIM in 2001 and was renamed ASOS in 2003.
ASOS made its first profit and launched its own women's label in 2004. In 2005 the Buncefield fuel depot explosion shut the business for six weeks. A warehouse fire in 2014 halted orders for nearly three days.
For FY2025 ASOS reported revenue of £2,464.8 million, an operating loss of £32.2 million and a net loss of £298.4 million. Frasers Group holds 29.26% and Bestseller 26%.