Dumonts take full control of Mavericks, buying out Adelson's stake
What's the deal? Sivan and Patrick Dumont have bought Miriam Adelson's shares in the Dallas MavericksDealroom has a profile for this one. Try Dealroom →, lifting the family to a 69% controlling stake. The buyout, by the Dimond Family OfficeDealroom has a profile for this one. Try Dealroom →, was announced in November; terms were undisclosed.
Why now? Adelson had minimal involvement since she bought the majority stake from Mark Cuban in December 2023, while Patrick Dumont has served as the team's governor throughout. The deal consolidates control in the family already running the franchise.
What's the endgame? "It's really about long-term investment in the city of Dallas," Dumont told ESPN. The family wants to build "the best arena in the NBA" — a multibillion-dollar project at the former Valley View Mall site that is still subject to zoning and other approvals.
Mark Cuban retains a 27% stake. Under the 2023 sale terms, Dumont can buy another 20% from Cuban at the original $3.5 billion valuation. "Our plan is to look at that and to do that over time," Dumont said.
The front office: The ownership shift follows a leadership overhaul. Chief executive officer Rick Welts will retire at the end of the year, with president Ethan Casson succeeding him as CEO and alternate governor. Casson joined in 2025 after nine seasons leading the Minnesota TimberwolvesDealroom has a profile for this one. Try Dealroom → and WNBA LynxDealroom has a profile for this one. Try Dealroom →.
What could go wrong? Dumont's tenure has drawn fan anger, chiefly over approving the trade of Luka Doncic to the LakersDealroom has a profile for this one. Try Dealroom → months after the 2024 NBA Finals run. He has since fired general manager Nico Harrison and hired former Toronto Raptors executive Masai Ujiri as president to rebuild around No. 1 pick Cooper Flagg.
The signal: A cleaner ownership structure matters as NBA valuations surge — the Lakers changed hands at a reported $10 billion in 2025 and are reportedly being sold again for $12.5 billion in 2026, while the CelticsDealroom has a profile for this one. Try Dealroom → sold for $6.1 billion. For the Mavericks, the buyout is less a change in management than a clearer path to a new arena and the deals that follow.
Read more: espn.in
Image credit: Generated with Gemini
