The transaction is complete. An investor group led by William Chisholm now has a majority stake in the Boston Celtics.
After the sale's closing, Stephen Pagliuca, who helped the franchise return to prominence, including twice lifting the Larry O'Brien Trophy, in his role as a part-owner of the Celtics, released a statement on the deal.
Congrats to Bill Chisholm and his team on the closing of the Celtics transaction. Below is a statement from me reflecting on this important news. pic.twitter.com/x9fDeN8pLz
— Steve Pagliuca (@pagsceltics) August 19, 2025
"Congratulations to Bill Chisholm and the many new and current investors on the closing of the Celtics transaction today," said Pagliuca in a press release he shared on social media. "It is a fantastic group of leaders, and they will be excellent stewards of the franchise going forward."
Pagliuca helped guide the NBA's original monarchy in an era defined by success and perseverance. Boston turned multiple rebuilds into championship banners that now hang in the TD Garden rafters.
After an incredible 23-year run on and off the court, including in his role as president and co-founder of the Shamrock Foundation, Pagliuca stated, "it sometimes felt like I was living in a fairy tale."
His tenure isn't over quite yet. Pagliuca and his family will retain an investment interest in the Celtics for the next three years.
The structure of the Celtics' new investor group
Chisholm's investor group features real estate moguls, private equity investors, and the CEO of a steel industry titan.
After league rules required a restructuring of the new arrangement, Chisholm will take on the role of the organization's lead governor. Wyc Grousbeck will stay on as the Celtics' CEO and alternate governor through 2028.
"The Celtics have been my life's work for the past 23 years," said Grousbeck in the team's press release on the sale. "This incredible ride is now continuing. I am fired up to be shoulder to shoulder with Bill as we pull every lever to go after another banner. There is nothing better than winning."
Aditya Mittal poured $1 billion into Chisholm's investor group. The former is the CEO of ArcelorMittal. That's the world's second-largest steel and mining company. Mittal will also be an alternate governor for the 18-time NBA champions.
Chisholm's investor group also includes Bruce Beal, Andrew Bialecki, Dom Ferrante, Rob Hale, Mario Ho, and Ian Loring. The global investment firm Sixth Street is also a major participant.
"We are committed to building on the legacy of the Celtics and raising banners," Chisholm expressed in the team's press release about the transaction's closing. "I can't wait for the team to get back out there this fall."