Bill Chisholm has officially finalized the financial backing and assembled the ownership group necessary to proceed with his acquisition of the Boston Celtics, a deal valued at $6.1 billion.
When the agreement was initially reported in March, Chisholm’s offer was still pending full financing. Now, with all funding secured, the path is clear for the purchase to move forward.
However, the transaction won’t become official until it receives formal approval from the NBA’s Board of Governors, which is expected to come in either June or July.
Under the terms of the deal, Chisholm’s group will acquire a 51 percent controlling stake in the franchise this summer.
The remaining ownership shares are set to be sold in a second tranche in 2028, at which point the team’s valuation is projected to rise to approximately $7.3 billion.
Wyc Grousbeck, who currently serves as the Celtics’ governor, is expected to retain that role through the conclusion of the 2027–28 NBA season.
Notably, Grousbeck and Chisholm were seen sitting courtside together during Boston’s Game 5 victory over the New York Knicks on Wednesday, signaling a collaborative transition.
While the exact percentage of Chisholm’s ownership hasn’t been publicly disclosed, NBA rules require that a controlling owner hold at least 15 percent of the franchise.
Alongside Chisholm, private equity firm Sixth Street will also play a major role in the new ownership structure.
The firm, which already holds a substantial interest in the San Antonio Spurs, will own a significant stake in the Celtics as well.
This sale marks a major financial milestone for the Celtics and the NBA, positioning the franchise among the league’s highest-valued teams and setting the stage for a new era of leadership in Boston.
Bill Chisholm Finalizes Ownership Group, Obtains Full Financing To Complete Celtics’ Purchase https://t.co/4iGtAdZpac
— RealGM (@RealGM) May 15, 2025
