Boston Celtics Sold to Private Equity Investor for Record $6.1 Billion

The Boston Celtics, the most decorated franchise in NBA history, have been sold to a consortium led by private equity investor William "Bill" Chisholm for a record-breaking $6.1 billion. This transaction, finalized on August 19, 2025, marks the highest valuation ever for a U.S. professional sports team.

Chisholm, a Massachusetts native and co-founder of Symphony Technology Group, now holds at least a 51% ownership stake in the Celtics. The agreement includes a provision for Chisholm to acquire full control by 2028, potentially increasing the franchise's total valuation to $7.3 billion. The NBA unanimously approved the sale on August 13, 2025.

Outgoing owner Wyc Grousbeck, who led the group that purchased the Celtics in 2002 for $360 million, will remain CEO and serve as alternate governor until 2028 or until his share drops below 15%. Under Grousbeck's leadership, the Celtics secured NBA championships in 2008 and 2024, bringing their total to 18 titles.

The new ownership group also includes Boston businessmen Rob Hale, a current Celtics shareholder, and Bruce Beal Jr., president of Related Companies. Additionally, Aditya Mittal, CEO of ArcelorMittal, has committed a $1 billion investment towards the purchase, positioning him as the second-largest stakeholder and a potential alternate governor in the future.

This sale surpasses the previous record of $6.05 billion paid for the NFL's Washington Commanders in 2023. The escalating valuations of professional sports franchises reflect the increasing profitability and global appeal of major sports leagues.

Chisholm's deep roots in Massachusetts and lifelong support for the Celtics suggest a commitment to maintaining the team's strong connection with the Boston community. He has expressed intentions to focus on community impact, aligning with the franchise's longstanding tradition of community involvement.

The Celtics are projected to have a payroll of $225 million for the 2025-26 season, with luxury tax penalties potentially bringing the total operating costs to over $500 million. The new ownership will need to address these financial challenges to maintain the team's competitive edge.

As the Celtics transition to new ownership, fans and analysts alike will be watching closely to see how Chisholm and his team navigate the challenges and opportunities that come with leading one of the most storied franchises in sports history.