The NBA champions are officially for sale.

The Celtics majority ownership group, led by Wyc Grousbeck, is planning to put the team on the market. The news was first reported by ESPN and made official by the team shortly after. In a statement, the Celtics said the decision to sell was made “for estate and family planning considerations.” Grousbeck and his investment group bought the team from the Gaston family in 2002 for $360 million. Gatson had previously owned the team since 1983.