Mark Cuban Demands to see Details of Mavs’ Valley View Deal

Mark Cuban, the former owner of the Dallas Mavericks, is once again butting heads with the new ownership after selling his majority stake, this time taking issues with his business partners from the basketball court to the courtroom.

Cuban filed a petition in a Dallas County court this week to get access to the contracts the NBA team possesses to pursue development opportunities in Valley View to build a new arena. Cuban alleges he was left out of those discussions. The billionaire and reality TV star is also demanding details on how the project will be financed.

Specifically, Cuban is accusing Dallas Mavericks majority owners Patrick Dumont and Miriam Adelson of leaving him out of the new arena plans, a stance based on emails and verbal agreements he claims gives him the right to have a say in the team’s basketball operations. Cuban also claims that his various businesses were “contractually entitled to participate” in the Valley View deal, according to the Dallas Morning News.

In 2023, Dumont’s family, along with the Las Vegas casino mogul Adelson family, bought 69 percent of the Mavericks. Cuban maintained a smaller, 27 percent stake, according to the outlet, and has maintained the stance that he had a handshake deal to help out at a roster level.

The petition stated that Dumont gave the reins to Nico Harrison instead, which sparked a yearslong feud. The tensions bubbled over and breached the public sphere after the infamous Luka Dončić trade from the Mavericks to the Los Angeles Lakers in 2025, which Cuban claims he was unaware of until minutes before it was finalized.

Now, Cuban is demanding details about the new arena development at the site of the former Valley View mall, which he also claims he was unaware of until he saw the SEC filing. In the petition, Cuban says he doesn’t know who to sue, as the entity used to purchase the land for the arena was formed in Delaware, which does not require ownership disclosure. Granting the petition would open up potential for a lawsuit, according to the publication, which could heavily slow the development. The Mavericks’ lease with the American Airlines Center is up in 2031.

The Mavs electing to tentatively move forward with plans to move out of their downtown arena, the American Airlines Center, which is shared with the NHL team the Dallas Stars, who are also planning an exit, dealt a blow to the area that resonated beyond Downtown Dallas boosters.

— Hunter Cooke