Feb 19 (Reuters) - Vista Oil & Gas -
* VISTA OIL & GAS TO ACQUIRE ARGENTINE OIL & GAS ASSETS
* AGREED TO ACQUIRE FULLY OPERATIONAL OIL & GAS PLATFORM FROM PAMPA ENERGÍA, PLUSPETROL
* RIVERSTONE VISTA TO ACQUIRE ADDITIONAL 5 MILLION SERIES A SHARES FOR $50 MILLION PURSUANT TO PURCHASE AGREEMENT ENTERED INTO AT TIME OF CO'S IPO
* ALSO ENTERED INTO COMMITMENT LETTER FOR CREDIT FACILITY, OF UPTO $300 MILLION, THAT MAYBE USED AS BACKSTOP FOR INCREASING CERTAINTY OF CLOSING DEAL
* CERTAIN OTHER INVESTORS, HAVE ALSO AGREED TO BUY 10,000,000 SERIES A SHARES OF VISTA, FOR AN AGGREGATE PURCHASE PRICE OF US$100 MILLION
* UPON CLOSING, VISTA'S ENTERPRISE VALUE AT $10/SHARE WOULD BE APPROXIMATELY $860 MILLION AND AN EQUITY VALUE OF US$960 MILLION
* THE AGREEMENTS, IN CONJUNCTION WITH $650 MILLION IPO PROCEEDS, BRINGS TOTAL EQUITY AVAILABLE TO FUND TRANSACTION TO $800 MILLION