Bill Chisholm-Led Group Finalizes $6.1 Billion Purchase of Boston Celtics, Becoming Second-Most Valuable US Sports Franchise

The Boston Celtics are set to undergo a change of ownership, with Bill Chisholm’s group securing approval from the NBA Board of Governors for the sale on Wednesday. The transaction is expected to be finalized shortly, marking a significant shift in the ownership structure of the storied franchise.

The sale values the team at an estimated $6.1 billion, making it the second most expensive US sports franchise acquisition after the Los Angeles Lakers, which fetched a valuation of $10 billion when Mark Walter purchased the team in June. Chisholm and his associates will acquire at least 51% of the Celtics initially, with plans to purchase out the remaining minority shareholders in 2028 for a valuation of $7.3 billion.

According to multiple reports, Chisholm is expected to assume the role of governor upon completion of the sale. Current owner Wyc Grousbeck is anticipated to serve as alternate governor and retain his CEO position until 2028. Upon relinquishing the necessary ownership stake of at least 15%, Grousbeck will relinquish his role.

Chisholm, co-founder and managing partner of California-based private equity firm STG Partners, hails from Massachusetts and has been a longtime supporter of the Celtics. Grousbeck and the previous ownership group, Boston Basketball Partners LLC, acquired the team for $360 million in 2002. Under their stewardship, the club clinched NBA titles in 2007-08 and most recently in the 2023-24 season, marking Boston’s league-record 18th championship win.