Contextual editorial image illustrating professional basketball franchise leadership. The people pictured are not identified as Mavericks owners.
Patrick Dumont and his wife, Sivan Ochshorn, have become the controlling owners of the Dallas Mavericks after purchasing Miriam Adelson's shares in the NBA franchise. The transaction, completed in October 2026 and publicly confirmed on November 3, gives the Dumont family a 69% ownership stake.
Former controlling owner Mark Cuban retains 27% of the Mavericks, while minority shareholder Mary Stanton holds the remaining 4%, according to reporting by The Dallas Morning News.
The ownership change consolidates authority within a family that has already controlled the franchise's major decisions since December 2023. It also comes as the Mavericks pursue a new arena, reshape their basketball operations and attempt to restore confidence following a turbulent period for the organization.
How the Mavericks' Ownership Is Now Divided
Dumont and Ochshorn purchased Adelson's shares in October, a Mavericks spokesperson confirmed on November 3. Ochshorn is Adelson's daughter, and Dumont is her son-in-law.
The resulting ownership structure is:
- Patrick Dumont and Sivan Ochshorn: 69%.
- Mark Cuban: 27%.
- Mary Stanton: 4%.
The price paid for Adelson's shares in the latest transaction has not been publicly established in the reporting reviewed.
The family's initial acquisition of majority control from Cuban was completed in December 2023 at a reported franchise valuation of approximately $3.5 billion. That earlier valuation should not be confused with the undisclosed price of the October 2026 transaction.
Although the latest deal formally concentrates ownership in the Dumont household, Patrick Dumont was already serving as the Mavericks' governor and representing the organization at NBA Board of Governors meetings. He has exercised substantial influence over the franchise's business and basketball decisions since the 2023 acquisition.
That distinction matters: the announcement changes who holds the controlling equity interest, but it does not mark Dumont's first assumption of leadership.
What Happens to Mark Cuban's Stake?
Cuban remains a significant minority investor despite having sold majority control nearly three years ago.
Under the terms of the 2023 agreement, Dumont has an option to purchase an additional 20 percentage points of ownership from Cuban using the original $3.5 billion franchise valuation, according to ESPN's original November 3 report.
If that entire additional interest were acquired without other changes to the ownership structure, the Dumont family's stake would rise from 69% to 89%, while Cuban's would decline from 27% to 7%.
That additional purchase has not been confirmed as completed. Dumont has indicated that he intends to pursue the option over time, but an intention to buy is not the same as a closed transaction.
Cuban has publicly expressed frustration about his reduced involvement in the Mavericks' basketball and business operations. Those disagreements form part of the ownership story, but they do not alter the confirmed share distribution or establish that either side violated the original agreement.
The practical question is how much influence Cuban can retain as a minority shareholder while Dumont continues directing the organization's strategy.
How Dumont Has Already Reshaped the Mavericks
The latest ownership transaction follows significant changes to the Mavericks' leadership structure.
The franchise faced intense criticism after the February 2025 trade that sent Luka Dončić to the Los Angeles Lakers. The move, approved under Dumont's governorship, became a defining controversy for the organization and its relationship with fans.
The Mavericks subsequently dismissed general manager Nico Harrison and reorganized their basketball leadership.
Masai Ujiri now leads the basketball operation as team president, with Mike Schmitz serving as general manager and Dusty May as head coach. The franchise is building around young talent, including Cooper Flagg, as it seeks a more stable competitive direction.
These changes illustrate why the ownership announcement is more than a financial footnote. Dumont's influence over personnel, executive appointments and long-term investment was already substantial before he and Ochshorn acquired Adelson's remaining interest.
Still, ownership control does not guarantee results on the court. The success of the new leadership structure will depend on roster development, coaching, player health and competitive performance over multiple seasons.
Why the New Dallas Arena Matters
Contextual editorial image of a redevelopment landscape. It is not an authenticated photograph of the Mavericks' proposed arena site or evidence of construction progress.
A proposed new arena is central to the Dumont family's long-term vision for the Mavericks.
The organization is pursuing a basketball-focused venue and surrounding entertainment district at the former Valley View Mall location in North Dallas. The team has discussed a target opening in 2031, potentially allowing the Mavericks to begin the 2031–32 NBA season in a new home.
The Mavericks have an option to acquire land associated with the redevelopment area, while planning and rezoning work remain important parts of the process. A target opening date is not a guarantee that the necessary approvals, financing arrangements and construction milestones will be completed on schedule.
The team currently plays at American Airlines Center, which opened in 2001. A purpose-built replacement could provide the organization with greater control over the fan experience, premium seating, commercial activities and surrounding development.
Dumont also serves as chief executive of Las Vegas Sands, giving him experience with large-scale hospitality and entertainment properties. His ambitions for the Dallas project reflect that background, although the proposed arena remains a future development rather than a completed investment.
The ownership consolidation may simplify long-term decision-making around the project. It does not, by itself, resolve zoning questions, construction costs or other requirements.
What Comes Next for the Mavericks?
Three developments will help determine the significance of the latest ownership change.
First, the remaining Cuban stake. Any exercise of Dumont's additional purchase option would further concentrate ownership and reduce Cuban's financial interest in the franchise. Until such a transaction is confirmed, the current 69%–27%–4% distribution remains the relevant ownership breakdown.
Second, the arena project. Progress on land acquisition, zoning, financing and construction will indicate whether the proposed 2031 opening remains achievable.
Third, basketball performance. The restructured front office and coaching staff must demonstrate that the franchise can build a competitive team and restore confidence after the disruption of recent seasons.
The October transaction gives Patrick Dumont and Sivan Ochshorn clearer formal control over the Mavericks. The more consequential test will be whether that consolidated ownership produces measurable progress in both the franchise's basketball operations and its long-term plans for Dallas.
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