 Shares of Renewable Energy Group Inc. REGI, 1.74 soared 32.6 in premarket trade Monday, after announcing an agreement for Chevron Corp. CVX, 4.10 to acquire the company in an all-cash deal valued at 3.15 billion. Under the terms of the deal, Chevron will pay 61.50 per each Renewable Energy share owned, for a premium of about 57 over a 30-day averaged based on its closing stock price Friday. 