Mark Cuban has accused Dallas Mavericks governor Patrick Dumont of freezing him out of business opportunities related to a proposed arena move, according to a Dallas Morning News report published Wednesday.

Cuban alleges Dumont engaged in "adversarial business practices" while pursuing a plan to relocate the franchise roughly 10 miles north of downtown to a former mall site. A Mavericks spokeswoman and Cuban both declined to comment to The Associated Press.

Cuban sold his majority stake in the franchise in 2023 to the families of Miriam Adelson and Dumont, who is Adelson's son-in-law. He retains 27 percent ownership, though the purchase agreement includes a clause allowing the Adelson and Dumont families to acquire an additional 20 percent of his stake.

According to the report, Cuban claims he had an agreement to continue overseeing basketball operations after the sale. Dumont instead granted full control to former general manager Nico Harrison.

Cuban also stated in the filing that he was unaware of Harrison's plan to trade Luka Doncic to the Los Angeles Lakers in February 2025 until it was too late to intervene. The trade drew significant backlash across the league, and Harrison was fired in November following a slow start to the 2025-26 season.

The filing arrives roughly a month after the Mavericks signed an option agreement to purchase approximately 104 acres in north Dallas as part of a plan for a new arena opening in 2031.

Dallas has played downtown since entering the NBA as an expansion franchise in 1980. The team's current lease at American Airlines Center expires in 2031.

Cuban said his businesses were contractually entitled to participate in the new site, which the filing describes as a unique investment opportunity.