Vaca Muerta Strategic Investment

Transaction Summary Transaction Sources and Uses Transaction Summary - In January 2018, Vista agreed to acquire a portfolio of assets in Argentina's most prolific hydrocarbon basin from two sellers ◉ 99.68% equity stake in Petrolera Entre Lomas ("PELSA") 100% equity stake in APCO O&G Int'l and APCO Argentina 100% W.I. in 25 de Mayo-Medanito and Jagüel de los Machos 3.85% W.I. in Entre Lomas, Bajada del Palo and Agua Amarga block Vista secured commitments for $100MM in additional equity and secured a commitment from certain banks to provide a backstop credit facility of up to $300M M to complete the acquisitions Implied Total Enterprise Value Shares Outstanding (MM) Sources Share Price ($/sh.) Equity Value ($MM) (+) Net Debt Total Enterprise Value ($MM) Pro Forma Capitalization Pro Forma Capitalization at Closing Current Public Equity Investors New Public Equity Investors Riverstone Vista Capital Partners (FPA) Riverstone / Management Team (1) Total Shares Outstanding (MM) (1) Includes shares held by independent directors (2) Assumes cashless exercise of warrants $MM % IPO Proceeds 650 81.3% Riverstone Vista Capital Partners (FPA) 50 6.3% Capital Raise 100 12.5% Total 800 100.0% Uses $MM % Purchase Price 675 84.4% 96.3 Transaction Expenses 25 3.1% $10.00 Estimated Balance Sheet Cash at Close 100 12.5% 963 Total 800 100.0% (100) 863 At $10/sh. At $18/sh.(2) 67.5% 65.0 67.3% 72.8 10.4% 10.0 9.2% 10.0 5.2% 5.0 5.2% 5.6 16.9% 16.3 18.3% 19.8 100% 96.3 100% 108.2 30 30

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