The Dumonts buy out Miriam Adelson and hold 69% of the Mavericks on their own, with an option on Cuban’s stake priced about $570 million below market

Patrick Dumont and his wife, Sivan Ochshorn, now own 69% of the Dallas Mavericks without a partner on the cap table. The couple bought the shares held by Sivan’s mother, Miriam Adelson, last month, Tim MacMahon reported on Tuesday, Nov. 3, and a team spokesman confirmed it to Dallas reporters. The price was not disclosed, and it is not clear whether the transfer is final or still needs a vote of the NBA’s Board of Governors.

Confirming ESPN report that Sivan and Patrick Dumont have purchased the shares of Sivan’s mother, Miriam Adelson, raising the Dumonts’ Mavericks ownership stake to 69%. Mark Cuban owns 27% and Mary Stanton 4%. pic.twitter.com/sHkJMi6Xdp

— Brad Townsend (@townbrad) November 3, 2026

The number did not change, the name did

The 69% is not new. When Adelson and the Dumonts bought the team from Mark Cuban in December 2023, the two families took the same majority stake together. What changed in October is who holds it: the Dumonts, who have run the team since the sale, now hold it themselves. Adelson has had minimal involvement since. Dumont has made the major calls and sits in the Board of Governors seat as the team’s governor.

Here is how the ownership breaks down, with our own math using the $6.35 billion valuation Sportico last published for the franchise. Those dollar figures are what the stakes would be worth at that estimate, not prices anyone has paid.

Owner	Stake today	Value at $6.35 billion	Stake if option is used	Value then
Patrick and Sivan Dumont	69%	About $4.38 billion	89%	About $5.65 billion
Mark Cuban	27%	About $1.71 billion	7%	About $445 million
Mary Stanton	4%	About $254 million	4%	About $254 million

The option that matters

The part of this story that affects Cuban is the clause in the 2023 deal. Under it, the Dumonts can buy another 20% of the team from him at the original valuation, reported as $3.5 billion, before the end of 2027. Some reports put the 2023 price at $3.8 billion, so the exact figure is worth watching once any paperwork surfaces. Using $3.5 billion, the 20% would cost about $700 million. At the $6.35 billion estimate, the same slice would be worth about $1.27 billion, which is roughly $570 million more than the contract price.

Dumont said in his conversation with MacMahon that the family intends to use it. “Our plan is to look at that and to do that over time,” he said. “I just have to tell you: I love Mark. He’s been a great family friend for a really long time. He’s just a super passionate Mavs fan and he’s frustrated. I respect it.” Cuban said on a podcast in March: “I don’t regret selling. I regret who I sold to.” Our reading is that the option is the one lever Dumont fully controls, and a $570 million gap is a strong reason for him to pull it, though he has until December 2027 to decide.

If the option is used in full, Cuban would be left with about 7%, the same size as the slice the contract lets him keep, and the Dumonts would hold 89%. Cuban’s recent public comments, including his call for 40-minute games, which we covered last week, show he is still a loud voice around the league even as his ownership share shrinks.

What the control is for: the arena

Dumont framed the buyout as a statement about the arena. “It’s really about long-term investment in the city of Dallas,” Dumont said. “The Dumont family is really committed to building what we hope is the best arena in the NBA, a really significant investment in the city that will help create the new 40-year home for the Dallas Mavericks.”

The project is early. The Mavericks signed option agreements on June 1 for about 104 acres at the former Valley View Mall site in North Dallas and have filed for rezoning on about 112 acres. They have said they will not buy the land until the zoning is approved. Their lease at American Airlines Center runs through the 2030-31 season, and the target is to open the new building for 2031-32. As we reported when the team announced that Rick Welts retires at the end of this year and hands the project to Ethan Casson, Dumont is deeply involved in the design. He has said the Dallas arena will carry the hospitality touches he put in place at Macao’s Venetian Arena, which we covered in our Macao playbook piece, and that it will not include a casino.

What we don’t know

The purchase price and the valuation used for it are not public, and neither is whether the transfer needs league approval. The Mavericks’ statement said the family is “very happy with our family ownership,” which does not answer either question. Next to watch are any word from the league office on the transfer, the rezoning decision at Valley View and any sign that Dumont has started the Cuban buyout before the end-of-2027 deadline.