The Boston Celtics have a new owner, and there's one thing that isn't going to change at the NBA's most-decorated franchise."Coming in second is not the objective, and it’s not acceptable," private equity mogul Bill Chisholm said Tuesday after taking control of the team from Wyc Grousbeck.

The sale of the Boston Celtics was finalized on Tuesday, with private equity mogul Bill Chisholm taking over control of the NBA’s most-decorated franchise from a group led by Wyc Grousbeck that had ow...