X0306 4 2016-06-17 0 0001423902 Western Gas Equity Partners, LP WGP 0000773910 ANADARKO PETROLEUM CORP 1201 LAKE ROBBINS DRIVE THE WOODLANDS TX 77380 0 0 1 0 0000856716 WESTERN GAS RESOURCES INC 1201 LAKE ROBBINS DR. THE WOODLANDS TX 77380 0 0 1 0 Common Units representing limited partner interests 2016-06-17 4 S 0 12500000 38.09 D 178587365 I See footnote Western Gas Resources, Inc. ("WGR") directly or indirectly owns 178,587,365 common units, representing an 81.6% limited partner interest in the Issuer, and 100% of the equity interests of Western Gas Equity Holdings, LLC, which holds a 0% noneconomic general partner interest in the Issuer. Anadarko Petroleum Corporation ("Anadarko") owns all of the issued and outstanding shares of common stock of WGR. Accordingly, Anadarko may be deemed to be an indirect beneficial owner of any securities held by WGR. /s/ Anadarko Petroleum Corporation, by Philip H. Peacock as attorney-in-fact 2016-06-17 /s/ Western Gas Resources, Inc., by Philip H. Peacock as attorney-in-fact 2016-06-17