Symphony Technology Group managing partner Bill Chisholm has reportedly agreed to purchase the Boston Celtics from the Grousbeck family for a valuation for $6.1 billion, which is the largest sale of a North American sports franchise in history.

The sale surpasses the previous record set when a group led by billionaire Josh Harris purchased the NFL’s Washington Commanders for $6.05 billion in 2023.

The Grousbeck family made a massive profit off the sale, having initially purchased the Celtics for $360 million in 2002. The franchise is the winningest in NBA history with a league-best 3,684 regular season victories and 18 NBA championships, having entered the current 2024-25 season as defending world champions.