Type	Name	Date
Credit agreement	Fifth Amendment to the Credit Agreement, by and among Energen Corporation, as borrower, Wells Fargo Bank, National Association, as administrative agent, Energen Resources Corporation, as guarantor, and the institutions named therein as lenders	10/26/2016
Credit agreement	Fourth Amendment to the Credit Agreement, by and among Energen Corporation, as borrower, Wells Fargo Bank, National Association, as administrative agent, Energen Resources Corporation, as guarantor, and the institutions named therein as lenders	04/14/2016
Credit agreement	Second Amendment to the Credit Agreement, by and among Energen Corporation, as borrower, Wells Fargo Bank, National Association, as administrative agent, Energen Resources Corporation, as guarantor, and the institutions named therein as lenders	04/20/2015
Credit agreement	First Amendment to the Credit Agreement, by and among Energen Corporation, as borrower, Wells Fargo Bank, National Association, as administrative agent, Energen Resources Corporation, as guarantor, and the institutions named therein as lenders	10/23/2014

Type	Name	Date
Merger agreement	Agreement and Plan of Merger, by and among Diamondback Energy, Inc., Sidewinder Merger Sub Inc. and Energen Corporation.†	08/15/2018