Diamondback Subsidiary Viper Closes $900MM Midland Royalty Deal / Latest / By mark Diamondback Energy’s Viper Energy closed the last of three acquisitions from Tumbleweed Royalty, owned by Double Eagle Energy’s founders, that together totaled about $1.1 billion. Share this: Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X Related