Key TakeawaysEQT will pay approximately $5.5 billion for midstream natural gas infrastructure provider Equitrans Midstream, its former unit, as it expands its reach into the natural gas sector.The acquisition gives Equitrans investors 0.3504 share of EQT stock for every share they hold.EQT said the deal creates "America's first large-scale integrated natural gas producer."EQT was the worst-performing stock in the S&P 500 on Monday, down 8.2% in early-afternoon trading. EQT Corp. (EQT) was the worst-performi ...