Billions quietly exchanged in major Mavericks ownership twist

Sivan and Patrick Dumont have taken control of the Dallas Mavericks after buying Miriam Adelson’s shares in October, bringing their family’s ownership to 69%. Patrick Dumont said the change reflects a long-term commitment to Dallas, including plans for a new arena and the aim of building a championship-winning team.

Adelson bought the majority stake from Mark Cuban in 2023, and Cuban still owns 27%; under that sale’s terms, Dumont can buy a further 20% from him at the original $3.5 billion valuation. A new arena is planned for the 2031-32 season, while the team rebuilds around rookie Cooper Flagg after trading Luka Doncic and finishing last season 26-56. Dallas began this season 4-3.