Miami Dolphins majority owner Stephen Ross is digging into his pockets for a new venture as he reportedly is closing in on a roughly 45% stake of the Miami Open. 

Ross, who is 85 and has a reported net worth of over $10billion, will secure the huge new venture as part of the tournament’s ownership being up for sale by Silver Lake-owned WME Group. 

The majority sale is going to a group led by Ari Emanuel, who is also the CEO of TKO, the parent company of combat-sports federations UFC and WWE.  

Hard Rock Stadium, the Dolphins home venue, is also owned by Ross and has hosted the Miami Open since 2019, giving him the inside connection to the deal, per Front Office Sports.

The Miami Open is viewed as an important stop on tennis’ calendar, as one of the elite tournaments outside of the Grand Slam quartet, due to the prize money and standings points given out from the event. 

Jakub Mensik and Aryna Sabalenka won the individual тιтles of this year’s Miami Open back in March. 

Miami Dolphins majority owner Stephen Ross is digging into his pockets for a new venture

He will gain roughly 45% of the Miami Open, one of tennis’ biggest tournaments outside of the Grand Slam quartet (Pictured is tennis star Mirra Andreeva at this year’s event)

Ross holds heavy control of the Dolphins despite selling 13% of his sports ᴀssets last year to funds overseen by Ares Management, as well as Brooklyn Nets owners Joe Tsai and Oliver Weisberg. 

Ross also is the owner of the Miami International Autodrome, which holds Formula One’s Miami Grand Prix. 

The race is slated to be held annually through 2041 and has attracted plenty of A-list attention over the last few years. 

Despite his age, Ross has not discussed any sort of succession plans for his sports portfolio publicly. 

Ross’ business moves have not slowed in 2025, with Relevent Sports, which Ross owns with CEO Danny Sillman, garnering global commercial rights for UEFA’s men’s club compeтιтions, including the Champions League, per FOS. 

That portfolio looks to now include nearly a half-stake in the Miami Open.