Dumonts Take Full Control of Dallas Mavericks After Buying Out Adelson

Patrick Dumont has secured full operational control of the Dallas Mavericks by purchasing the remaining shares held by Miriam Adelson. The transaction closed last month, as first reported by ESPN and confirmed by a spokesman to The Dallas Morning News on Tuesday. This move ends a three-year period of shared ownership between the two families and solidifies Dumont’s authority over the franchise.

The Dumont family, which includes Sivan Ochshorn, now holds a 69% stake in the team. Mark Cuban retains a 27% share, while Mary Stanton, the widow of an original shareholder, owns the remaining 4%. In a prepared statement, the Dumonts said they are committed to building a championship team and growing the organization’s impact in Dallas. They expressed happiness with their family ownership and excitement about the franchise’s future.

Dumont, 52, has led the team’s strategic direction since Adelson, Ochshorn, and Dumont bought the Mavericks from Cuban in December 2023. Adelson has had minimal day-to-day involvement since the purchase. Dumont has served as the primary representative at NBA Board of Governors meetings and has made final calls on major decisions. He is currently the CEO of Las Vegas Sands Corp. and chairman of Sands China Ltd.

Under Dumont’s leadership, the Mavericks have undergone a complete overhaul of their roster and front office. After Cynt Marshall retired in 2024, Dumont hired Rick Welts as CEO. In February 2025, the team traded Luka Doncic, a move that led to a public dispute and the dismissal of then-CEO Nico Harrison. Since that time, Dumont has appointed Ethan Casson as the new president, with Casson set to succeed Welts as CEO at the start of the new calendar year.

The front office shakeout also included the hiring of Masai Ujiri as team president and alternate governor. Ujiri will oversee the construction of a new roster centered on Cooper Flagg, the former No. 1 overall pick. Eight of the franchise’s top 11 business-side senior managers have been replaced under Dumont’s tenure. The team recently traveled to Macao for the NBA China Games, a venture driven in part by Dumont’s connections through his gaming business.

With full ownership secured, Dumont will proceed with plans for a new home for the Mavericks. The franchise is targeting a 2031 opening for a basketball-only venue and entertainment district. The site will be the former Valley View Mall location, where the team will move when its lease at American Airlines Center expires. Cuban has stated he regrets selling the team to the Adelson-Dumont group, though terms from the original $3.5 billion sale allow Dumont to buy another 20% from Cuban at that valuation.