In a surprising move, the ownership group of the Boston Celtics, known as Boston Basketball Partners, has announced their intention to sell a "majority interest" of the franchise by early 2025. This decision comes just two weeks after the Celtics claimed their historic 18th NBA championship.

Led by Wyc Grousbeck, the ownership group aims to close on a sale of "all the shares" in 2028. Grousbeck, who purchased the Celtics for $360 million in 2002, will remain as the franchise's governor until that time. The sale is said to be motivated by estate and family planning considerations, as stated in the Celtics' official statement.

Under Grousbeck's leadership, the Celtics have enjoyed success, winning two championships in 2008 and 2024, along with 16 postseason appearances in the past 17 seasons. Forbes estimates the value of the team at $4.7 billion, placing them fourth among the most valuable NBA franchises, following the Golden State Warriors, New York Knicks, and Los Angeles Lakers.

Despite the Celtics' financial success, Grousbeck revealed in an interview with the Boston Globe that the franchise was "losing money" during their championship-winning season. A high payroll of $183.7 million, the fourth-highest in the league, may have contributed to the financial strain.

Amidst new salary cap rules and stricter financial penalties, keeping the Celtics' championship team intact will become increasingly expensive. While they are set to retain their entire starting lineup and key reserves for the 2024-25 season, difficult roster decisions and potential luxury tax bills loom in the future.

The sale of the Boston Celtics is expected to command a record price, potentially surpassing the $4 billion paid for the Phoenix Suns by mortgage industry executive Mat Ishbia in 2023. The Celtics' rich history, large market, and prestigious reputation make them a highly sought-after asset in the NBA.

This move by the Celtics' ownership group follows a trend within the NBA of owners selling their stakes during successful periods. Milwaukee Bucks co-owner Marc Lasry sold his share shortly after the franchise won its first championship in 50 years, while Dallas Mavericks owner Mark Cuban sold his majority stake just before the team reached the Finals for the first time in over a decade.

Under Commissioner Adam Silver's tenure, NBA franchise values have skyrocketed, increasing from an average of $634 million in 2014 to a staggering $3.85 billion in 2023, according to Forbes.

As the Boston Celtics prepare for the upcoming season, the uncertainty of new ownership looms over the franchise. Fans and investors alike will be eager to see who will take the reins of this iconic basketball franchise and lead them into the future.