STWF SPORTS | DALLAS, Texas | NOVEMBER 4, 2026 – A new chapter in Dallas Mavericks history is officially underway as Patrick Dumont and his wife, Sivan Ochshorn Dumont, have become the franchise’s controlling owners after purchasing Miriam Adelson’s remaining ownership stake.
The transaction, completed in October and announced November 3, gives the Dumont family a 69% share of the organization, strengthening its authority over the Mavericks’ basketball operations, business strategy and long-term development.
The ownership change signals another significant transformation for a franchise navigating organizational restructuring, renewed championship expectations and plans for a new arena.
Dumont Family Strengthens Ownership Position
The Mavericks originally transitioned from longtime owner Mark Cuban in December 2023, when Adelson and the Dumont family acquired majority ownership in a transaction valued at approximately $3.5 billion.
Patrick Dumont has served as the team’s governor since that acquisition, overseeing several major organizational decisions.
Cuban retains a 27% minority ownership stake, although his involvement in basketball and business operations has diminished.
Under the original purchase agreement, Dumont also holds an option to acquire an additional 20% ownership interest from Cuban using the franchise’s 2023 valuation.
While no specific timetable has been announced, Dumont has indicated that expanding the family’s stake remains under consideration.
Mavericks Continue Major Basketball Operations Overhaul
The ownership transition comes during a period of significant changes within Dallas’ basketball leadership.
The controversial February 2025 trade of Luka Dončić to the Los Angeles Lakers created widespread frustration among Mavericks supporters and intensified scrutiny of the organization’s direction.
Dumont subsequently dismissed general manager Nico Harrison in November 2025 before bringing in championship-winning executive Masai Ujiri to oversee basketball operations.
Ujiri has since implemented substantial organizational changes, including hiring general manager Mike Schmitz and replacing former head coach Jason Kidd with Dusty May.
The franchise is now building around Cooper Flagg, the former No. 1 overall draft selection and reigning NBA Rookie of the Year.
Dumont has placed considerable confidence in Ujiri’s leadership, emphasizing accountability, player development and establishing a sustainable winning culture.
New Arena Headlines Long-Term Investment Plans
Dallas Mavericks: A Vision for the Future
One of the Dumont family’s most ambitious projects involves constructing a new home for the Mavericks.
The organization is targeting a 2031 opening for a basketball-focused arena and surrounding entertainment development.
Dallas has secured an option to purchase approximately 104 acres at the former Valley View Mall site in North Dallas, with zoning efforts underway.
The proposed facility would eventually replace American Airlines Center as the Mavericks’ home venue.
Dumont, who also serves as CEO of Las Vegas Sands, intends to incorporate premium hospitality, innovative architecture and enhanced fan amenities into the project.
The organization views the development as a long-term investment capable of expanding the Mavericks’ economic and community presence throughout Dallas.
Organizational Investment Extends Beyond Arena
Dallas is also investing heavily in its existing infrastructure.
The franchise recently completed an eight-figure renovation of its practice facility, including an upgraded dining and nutrition program designed to support player performance.
Additional renovations to the team’s business offices are underway.
Meanwhile, veteran sports executive Rick Welts is preparing to retire from his position as CEO at the end of 2026.
Team president Ethan Casson is expected to succeed Welts, continuing the organization’s transition toward a new leadership structure.
These developments reflect the ownership group’s emphasis on modernizing both basketball operations and the overall business experience.
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STWF Sports Final Takeaway
The Dumont family’s increased ownership represents a defining moment for a Mavericks organization working to rebuild confidence among its fan base.
With Ujiri directing basketball operations, Flagg emerging as the franchise’s young cornerstone and an ambitious arena project taking shape, Dallas is positioning itself for significant long-term change.
However, the ultimate measure of ownership success will extend beyond new facilities and executive appointments.
For Mavericks fans, the expectation remains unchanged: competitive basketball, organizational stability and another NBA championship.
The Dumont family’s challenge now is transforming its substantial financial commitment and ambitious vision into consistent success on the court.
STWF Sports | Dallas Mavericks Coverage | NBA 2026–27 Season
