BOSTON —

The Boston Celtics, the only team in NBA history with 18 championship trophies, have a new ownership group.

William Chisholm's investment group took control of the storied franchise on Tuesday morning, the team announced. The NBA's Board of Governors unanimously approved the $6.1 billion deal last week.

Chisholm, managing director and co-founder of Symphony Technology Group, will serve as governor, and Wyc Grousbeck and Aditya Mittal will serve as alternate governors. Grousbeck will be a co-owner and CEO.

Grousbeck was originally expected to retain the governor role through the 2027-28 NBA season when the deal was announced in March. The CEO is more of a figurehead, while the governor generally has the final say on NBA team decisions.

Other members of the investment group inc

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