Mark Cuban is taking his successor to court.
The former Dallas Mavericks majority owner Cuban is suing current Mavericks majority owner Patrick Dumont for allegedly freezing him out of business opportunities related to the team. The Dallas Morning News reports that Cuban has alleged that Dumont shut him out of the team’s plans for a new arena and other lucrative development opportunities.
Cuban’s filing reportedly claims that Dumont engaged in “adversarial business practices” in his efforts to move the Mavericks to the site of the former Valley View Mall in Dallas, Texas (some 10-15 miles north of the team’s current home of American Airlines Center in Dallas, Texas). The billionaire businessman Cuban claims that he still has a right to be involved in the team’s business opportunities and is requesting further details about the finances and corporate structure of the Mavericks’ project for a new arena.
You can read The Dallas Morning News’ full report on the situation here.
Cuban officially sold his controlling interest in the Mavericks to Dumont and his mother-in-law Miriam Adelson back in 2023. Eventually, Cuban explained why exactly he decided to sell the team.
But the relationship between Cuban and Dumont has rapidly deteriorated over the last couple of years. Cuban, who is still a minority owner of the Mavericks to this day, expected that he would still have a say over the team’s day-to-day basketball operations. However, that ultimately proved not to be the case, most notably when Cuban was not consulted by Dumont on the team’s franchise-altering trade of superstar Luka Doncic in 2025.
Earlier this year, Cuban reportedly explored the possibility of buying back his controlling interest from the Dumont-Adelson family but was ultimately rebuffed. Cuban has since expressed his regrets over whom he sold the team to, and now he is taking Dumont to court over his latest grievance about the Mavericks.