FTC Strikes Again: Diamondback’s $26B Endeavor Merger Delayed / Latest / By mark Diamondback Energy, which was nearing the end of a regulatory review period of its merger with Endeavor Energy Resources, is the latest E&P to see a deal postponed by the Federal Trade Commission. Share this: Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X Related