Sivan and Patrick Dumont purchased Miriam Adelson's shares of the Dallas Mavericks last month, making the Dumont family the controlling owners of the franchise with a 69% share.
Adelson has had minimal involvement with the Mavericks since she bought the majority share of the franchise from Mark Cuban in December 2023 along with her daughter and son-in-law. Patrick Dumont has served as the Mavericks' governor since the families took control of the franchise.
"It's really about long-term investment in the city of Dallas," Dumont told ESPN on Tuesday. "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."
Cuban, who has expressed regret about selling the Mavericks to Adelson and the Dumonts due to being frozen out of the franchise's basketball and business operations, maintains a 27% share of the franchise. According to the terms of the 2023 sale, Dumont can purchase another 20% share from Cuban at the original $3.5 billion valuation.
"Our plan is to look at that and to do that over time," Dumont 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. 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."
Dumont, the Las Vegas Sands Co. CEO, has overseen a major overhaul of the franchise during his turbulent tenure as the Mavericks governor.
Dumont drew intense wrath from the fanbase for approving former general manager Nico Harrison's decision to trade perennial MVP candidate Luka Doncic to the Los Angeles Lakers months after the Mavericks' run to the 2024 NBA Finals. Dumont has since taken drastic measures to attempt to position the franchise for success as it pivots to build around Cooper Flagg, the reigning Rookie of the Year who Dallas drafted with the No. 1 overall pick after a historic stroke of lottery luck.
"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."
Dumont, who fired Harrison last November, hired championship-proven former Toronto Raptors executive Masai Ujiri as president in May and authorized Ujiri to make sweeping changes throughout the front office and coaching staff.
"This is Masai Ujiri's team," Dumont said. "He's got a ring. He knows what he's doing."
Ujiri parted ways with former coach Jason Kidd and replaced him with Dusty May, who had just led Michigan to a national championship. Ujiri also hired general manager Mike Schmitz, who had been the assistant general manager for the Portland Trail Blazers.
"I'm really proud of our team," Dumont said. "I think it starts on the basketball side with Masai Ujiri. He's a supreme talent. He's a great person with very high character. He works very hard. He's very focused on accountability and creating a winning team and creating a culture of success. It started with him."
Dumont has also made hires in eight of the 11 senior leadership positions in the franchise's business operations over the last two years.
Dumont recruited Naismith Hall of Fame executive Rick Welts out of retirement, hiring Welts in 2025 as CEO to help guide the franchise through a significant transformation, including planning for a new arena to open in 2031. Welts plans to retire again at the end of the calendar year and will be succeed by team president Ethan Casson, who joined the Mavericks in August 2025 after a nine-year tenure as the CEO of the Minnesota Timberwolves and Lynx.
"I've seen this movie before," said Welts, who led the Chase Center project during his decade-long tenure with the Golden State Warriors during that franchise's dynasty era. "I can't guarantee championships, but this [franchise] is destined for great success because of the leadership that Patrick has put in place on the business and basketball sides."
The Mavericks' practice facility underwent an offseason renovation with at an eight-figure cost. A highlight of the renovation was the re-design and expansion of the dining area, creating the Champions Performance Kitchen in collaboration with the 50 Eggs Hospitality Group, providing players, coaches and staff an elite restaurant-caliber culinary experience and personalized performance nutrition.
The team's business offices are currently undergoing an eight-figure renovation.
The anticipation is that the franchise will have a new business office and practice facility when the Mavericks' new arena is scheduled to open in five years. The franchise entered into an option agreement this summer to purchase a 104-acre tract at the former Valley View Mall site in north Dallas, and the process of re-zoning to allow for the construction of an arena at that site is underway.
"I'm feeling great about where we are in terms of creating the best building ever created for basketball," Welts said. "From a design perspective, we're way ahead of schedule. Patrick is very involved in that. Patrick has taken it to a different level. Patrick's interest in all things related to hospitality is unlike anything I've ever seen before. He builds the best hotels and resorts in the world. That's his day job, understanding how to build a premium hospitality experience. He's more involved in the building of this arena than any owner I can imagine."
Dumont oversaw the construction of the Venetian Arena in Macao, China, which is two years into a five-year deal to host the NBA's preseason China Games. That building is a 12,000-seat arena with elements of a luxury resort. Dumont's plan is incorporate similar luxury touches into a larger arena with Texas style elements in Dallas.
"That was something we couldn't do to the scale that we can do in Dallas," Dumont said. "I think what we bring to Dallas is going to be world class. My goal is to make the best arena in the NBA. It starts with the court and expands outwards, and I want to make sure the fans have the best experience possible, because we owe it to them."