The NBA Board of Governors has unanimously approved the sale of controlling interests in the Boston Celtics to an investor group led by Bill Chisholm, managing director and co-founder of Symphony Technology Group. The league confirmed the development in a statement, noting that the transaction is expected to close shortly. The deal values the storied Celtics franchise at an initial valuation of $6.1 billion, the highest ever offered for a North American sports team. This significant approval marks a new chapter for the Celtics under the leadership of Chisholm and his co-investors.