Key Takeaways Diamondback Energy shares rose in pre-market trading Monday after announcing a $26 billion merger deal with Endeavor Energy Resources. Deal activity has increased in the energy sector over the past six months as producers seek prime acreage to ramp up production amid higher oil prices. The Diamondback Energy share price has traded within an ascending triangle since June 2022, a chart pattern that indicates a continuation of the current long-term trend. Diamondback Energy, Inc. This image depic ...