Republican megadonor Miriam Adelson quietly sold her majority stake in the NBA‘s Dallas Mavericks last month to her daughter and son-in-law, Sivan and Patrick Dumont, giving the couple a 69-percent share of the team.
ESPN was the first to report the sale. An NBA spokesman as well as Mavericks minority owner and former team governor Mark Cuban declined to comment when contacted by The Daily Mail.
The sale means Adelson no longer ranks atop American team owners in terms of political donations. The 81-year-old Israeli-American physician, businesswoman and philanthropist has been spending heavily on GOP campaigns this cycle, giving $67.6 million, according to Federal Election Commission filings reviewed by Front Office Sports.
She previously spent around $100 million on Donald Trump‘s successful presidential run in 2024.
Along with the Dumonts, the widow of casino magnate Sheldon Adelson bought a majority stake in the team from Cuban in 2023 at a valuation of $3.5 billion. To finance the purchase, Adelson reportedly sold $2 billion worth of Las Vegas Sands shares, leaving Cuban with a 27-percent stake in the team, which he still retains.
Although he said he doesn’t regret divesting from the team, Cuban admitted in April that he does regret selling to Adelson and the Dumonts. Now the couple has the option to purchase another 20-percent share of the team from Cuban at the $3.5 billion valuation, according to ESPN.
Miriam Adelson (left) sits with her daughter Sivan Ochshorn and son-in-law Patrick Dumont
Mavs minority owner Mark Cuban declined to comment when contacted by The Daily Mail
The transaction was approved by the NBA’s board of governors, The Daily Mail has learned.
‘It’s really about long-term investment in the city of Dallas,’ Patrick Dumont, the Las Vegas Sands Co. CEO, told ESPN.
‘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, a great experience for our fans and inspire our team to win championships. That’s really what we’re focused on. We had the opportunity, and we’re really excited about it.’
In speaking with ESPN, Dumont remained positive about his relationship with Cuban.
‘Our plan is to look at that and to do that over time,’ Patrick continued. ‘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.
‘We’re going to hopefully do him proud. That’s my goal – to make all of our Mavs fans super proud about the success of the team and win a championship.’
Cooper Flagg suddenly looks like an All-Star while averaging 25.2 points per game
Mavericks governor Patrick Dumont (left) sits court side with Mavs fan Nicholas Dickason
Patrick remains a divisive figure among Mavericks fans, many of whom are still upset about the 2025 trade of team cornerstone Luka Doncic to the Los Angeles Lakers. The Mavs have since replaced lead executive Nico Harrison with Masai Ujiri and now there is growing optimism in Dallas amid a 4-3 start under new coach Dusty May.
Best of all, current franchise cornerstone Cooper Flagg suddenly looks like an All-Star while averaging 25.2 points, 6.5 assists and 2.5 steals a game.
‘The most important thing every day is just trying to work harder to get better,’ Dumont said. ‘It’s something that really applies in life, but it’s something that really applies to here. It’s been an experience as a new owner in the league. Dallas is a great sports city.
‘I think we have the best fans in the NBA, very passionate, and it’s my job to make sure that we win and that we support our fans. I’m really focused on that. I’ve learned that there are a lot of things you can do – sometimes they work, sometimes they don’t – but you’ve got to keep pushing, got to keep going.’
