The Dumont family now controls the Mavericks with a 69% share after buying Adelson's stake

The stake changes hands

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.

The move formalizes an arrangement that had been in place since the families bought the team from Mark Cuban in December 2023.

Patrick Dumont had served as the Mavericks' governor since that purchase, so the operational control was already his.

The difference now is the equity: the family owns the majority of the franchise rather than holding it through Adelson's shares.

The Mavericks have not changed their front office or basketball operations as part of the transaction.

What the Dumonts own

The Dumont family's stake is now 69%, which is the threshold that makes them the controlling owners in the league's ownership documents.

Adelson sold her shares but remains connected to the franchise through family ties: Patrick Dumont is her son-in-law.

That relationship is why the transition is being described as an internal reallocation rather than a new ownership group.

The league's board of governors will still need to approve the changed ownership structure formally.

No vote has been scheduled publicly, and the team has not commented on timing.

The family's public posture has been consistent: investment in the city and the building.

Dallas has not asked the league for anything unusual, and the approval is expected to be procedural.

Adelson's remaining role

Adelson has had minimal involvement with the Mavericks since the 2023 purchase.

She bought the majority share with her daughter and son-in-law, and the family's public comments about the team have been rare.

Her exit from the cap table does not change the Mavericks' day-to-day operations, which have been run by Dumont and the front office.

It does simplify the ownership structure at a moment when the franchise is trying to fund a new arena.

A single controlling family is easier for the league and for the city to deal with than a split structure.

Cuban's remaining share

Mark Cuban retains a 27% share of the franchise after selling the majority in 2023.

He has said publicly that he regrets the sale because he was frozen out of the team's basketball and business operations.

Cuban's role since then has been that of a minority partner with a public voice and no operational control.

The terms of the 2023 agreement included provisions about his involvement, and the current structure does not change them.

His public comments remain the most visible reminder that the Mavericks are no longer run the way they were for two decades.

Cuban has kept his 27% and his megaphone, which is an unusual combination in the NBA.

His comments are the reason the ownership change is being discussed as a story rather than a filing.

Why Dallas, why now

Dumont framed the purchase as a long-term investment in the city of Dallas rather than a short-term financial move.

He told ESPN the family is committed to building what they hope will be the best arena in the NBA.

That sentence is the clearest statement of the family's strategy since taking over: real estate and infrastructure rather than a quick basketball fix.

An arena project in Dallas would require city approvals, financing and a long timeline.

Owning 69% makes it easier to make those commitments without negotiating with a second large shareholder.

The arena question

The Mavericks play in an arena that opened at the start of the century and has been renovated since, but the team has been linked to a new building for years.

Dumont's comments are the strongest signal yet that the family wants to pursue one.

A new arena is usually the largest single decision an ownership group makes, and it shapes the franchise for decades.

It also requires a public process, which is why the ownership structure matters: the city needs one counterparty.

The Mavericks have not filed a proposal, and the team has not given a timeline.

The basketball side

The ownership change does not fix the roster, and the Mavericks' start has been uneven.

Dallas is four and three after losing at home to Sacramento, a game in which a rookie forward shot poorly.

The team's payroll and draft assets are the constraints any ownership group inherits.

A stable ownership structure is usually good for basketball operations, because it removes uncertainty about who approves spending.

The Mavericks' front office has been active in trades over the past two seasons, and that is expected to continue.

What comes next

The league's approval process is the next formal step, and it is usually routine when the buyer is already an approved owner.

The arena conversation will move slowly, and the city's involvement will be the determining factor.

On the court, the Mavericks play again this week with the same roster and the same questions.

Cuban's public commentary is the wildcard in the story, because he has been willing to say what other owners will not.

For now, the ownership question is settled, and the basketball questions are not.