| 1101 | Argent Energy (Us) Holdings Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Feb 2019 |
| 1102 | Argent Energy In | | Oil Operator | Feb 1994 |
| 1103 | Argent Energy, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Feb 2019 |
| 1104 | Argent Petroleum Corporation | Henderson, TX 75654 | Oil & Gas Operator | Jun 2019 |
| 1105 | Argentia Operating Company | | Oil Operator | Dec 1991 |
| 1106 | Argo Petroleum Corp. | | Oil & Gas Operator | Dec 1989 |
| 1107 | Argonaut Energy | | Oil & Gas Operator | Aug 1991 |
| 1108 | Argonex Company LLC | | Oil & Gas Operator | Dec 2018 |
| 1109 | Argos Properties, Inc. | | Oil & Gas Operator | Apr 1992 |
| 1110 | Argosy | | Oil & Gas Operator | Aug 2003 |
| 1111 | Argosy Oil Company | | Gas Operator | Dec 1999 |
| 1112 | Argus Drilling, LLC | | Oil & Gas Operator | Mar 2008 |
| 1113 | Argus Production Company | Dallas, TX 75382 | Oil & Gas Operator | Jun 2019 |
| 1114 | Ariel Resources, Inc. | | Gas Operator | May 1997 |
| 1115 | Aries Oil & Gas Company, Inc. | | Oil Operator | Dec 1986 |
| 1116 | Aries Operating, LLC | | Oil & Gas Operator | Feb 2009 |
| 1117 | Aries Operating, LP | Houston, TX 77042 | Oil & Gas Operator | Jun 2019 |
| 1118 | Aries Petroleum Corp. | Big Springs, WV 26137 | Oil & Gas Operator | Dec 2017 |
| 1119 | Arista Novelty, Inc. | | Oil & Gas Operator | Feb 1995 |
| 1120 | Aristata Exploration Co. | | Gas Operator | Dec 2009 |
| 1121 | Arizona Oil Comp | | Oil Operator | Oct 1984 |
| 1122 | Arjay Oil Company | | Oil Operator | Dec 1999 |
| 1123 | Ark Petroleum Inc. | | Oil & Gas Operator | Nov 1997 |
| 1124 | Ark Resources Inc | Indiana, PA 15701-0069 | Oil & Gas Operator | Dec 2014 |
| 1125 | Ark Trust, Carol W Byrd Trustee | | Oil Operator | Apr 2019 |
| 1126 | Ark, Mary P. | Silver Creek, NY 14136 | Gas Operator | Dec 2017 |
| 1127 | Ark-La-Tex Anchor, Inc. | | Oil & Gas Operator | Mar 1999 |
| 1128 | Ark-La-Tex Energy Partners, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Mar 2015 |
| 1129 | Ark-La-Tex Energy, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2019 |
| 1130 | Ark-La-Tex Production, LLC | Doddridge, AR 71834 | Oil Operator | Jun 2019 |
| 1131 | Arkana Operating Company, Inc | | Gas Operator | Jul 2008 |
| 1132 | Arkansas Production Services, LLC | Smackover, AR 71762 | Oil Operator | Apr 2019 |
| 1133 | Arkies Well Service Inc | | Oil Operator | Aug 2009 |
| 1134 | Arkla Energy Resources | | Oil & Gas Operator | Nov 2008 |
| 1135 | Arkla Expl.Co & George E Woods | | Oil & Gas Operator | Mar 2011 |
| 1136 | Arkla Exploration Co. | Shreveport, LA 71151 | Oil & Gas Operator | Sep 2006 |
| 1137 | Arkla Petroleum LLC | | Oil & Gas Operator | May 2006 |
| 1138 | Arkland Producing Co., Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2019 |
| 1139 | Arkland, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 1994 |
| 1140 | Arklatx Operating Company, Inc | Smackover, AR 71762 | Oil & Gas Operator | Apr 2019 |
| 1141 | Arkoma Gas Company | Edmond, OK 73003-5672 | Gas Operator | Dec 2009 |
| 1142 | Arkoma Operations LLC | | Gas Operator | Mar 2019 |
| 1143 | Arkoma Prod Co Of Texas, Inc. | | Oil Operator | May 2004 |
| 1144 | Arkoma Prod. Co. Of Calif. | | Oil & Gas Operator | Dec 1993 |
| 1145 | Arkoma Resources LLC | Henryetta, OK 74437-0306 | Gas Operator | Mar 2019 |
| 1146 | Arkoma, Sandra | | Oil & Gas Operator | May 1995 |
| 1147 | Arleand Resources | | Oil & Gas Operator | Jun 2019 |
| 1148 | Arledge & Young, Inc. | | Oil & Gas Operator | Feb 1999 |
| 1149 | Arledge, Terry | Rockdale, TX 76567 | Oil & Gas Operator | Jun 2019 |
| 1150 | Arlen Corporation | | Oil & Gas Operator | Mar 2008 |
| 1151 | Arlian, Inc. | Denver, CO 80202 | Oil Operator | Feb 1998 |
| 1152 | Arlis Scogin | | Oil Operator | Jul 1985 |
| 1153 | Arlis Scogin Et Al | | Oil & Gas Operator | Jan 1990 |
| 1154 | Armac Resources | Washington, PA 15301-0558 | Oil & Gas Operator | Dec 2011 |
| 1155 | Armac Resources LLC | Washington, PA 15301-8160 | Oil & Gas Operator | Dec 2018 |
| 1156 | Armada Operating, LLC | Dallas, TX 75254 | Oil Operator | Aug 2015 |
| 1157 | Armada Resources Corporation | Manor, TX 78653 | Oil & Gas Operator | Jun 2019 |
| 1158 | Armadilla Oil & Gas, LLC | Madison, KS 66860 | Oil Operator | Oct 2018 |
| 1159 | Armadillo Services Inc Of Alabama | Raymond, MS 39154 | Oil & Gas Operator | Mar 2012 |
| 1160 | Armidillo Oil Company | Luling, TX 78648-2169 | Oil & Gas Operator | Jun 2019 |
| 1161 | Armor Energy LLC | | Oil & Gas Operator | May 2018 |
| 1162 | Armor Lonestar, LLC | Tulsa, OK 74146 | Oil & Gas Operator | Jun 2019 |
| 1163 | Armor Petroleum, Inc. | Wichita Falls, TX 76308-625 | Oil & Gas Operator | Jun 2019 |
| 1164 | Armor Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Jun 2019 |
| 1165 | Armor SWD Inc | | Oil Operator | Jun 2018 |
| 1166 | Armour Resource Holdings, LTD. | | Oil & Gas Operator | Nov 1994 |
| 1167 | Armour, Widd | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 2019 |
| 1168 | Armstrong & Jack | | Gas Operator | Jun 1997 |
| 1169 | Armstrong Energy Corp | Roswell, NM 88202 | Oil & Gas Operator | Jan 2019 |
| 1170 | Armstrong Gas Co LLC | Kittanning, PA 16201 | Oil & Gas Operator | Dec 2018 |
| 1171 | Armstrong Oil, Inc. | Newport Beach, CA 92663 | Oil & Gas Operator | Dec 2017 |
| 1172 | Armstrong Operating, Inc. | Dickinson, ND 58602 | Oil & Gas Operator | Apr 2019 |
| 1173 | Armstrong Petroleum Corporation | Newport Beach, CA 92659-0547 | Oil & Gas Operator | Feb 2018 |
| 1174 | Armstrong Robert D | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2017 |
| 1175 | Arnaudville Company Inc. | | Oil & Gas Operator | Oct 1986 |
| 1176 | Arnell Oil Company | | Oil Operator | Dec 2019 |
| 1177 | Arnett Saltwater Disposal LLC | | Oil Operator | Oct 2015 |
| 1178 | Arnold & Assoc-D&D-Coquina | | Oil Operator | Oct 1985 |
| 1179 | Arnold Dan C | Pomeroy, OH 45769 | Oil & Gas Operator | Dec 2018 |
| 1180 | Arnold Oil Properties, Inc. | Oklahoma City, OK 73116 | Oil & Gas Operator | Dec 2006 |
| 1181 | Arnold Oil Properties, L.L.C. | Oklahoma City, OK 73116-9039 | Oil & Gas Operator | Jun 2019 |
| 1182 | Arnold Prodn. | | Oil & Gas Operator | Jan 2006 |
| 1183 | Arnold Ridge LLC | | Oil Operator | Dec 2014 |
| 1184 | Arnold, Wayne | Smackover, AR 71762 | Oil Operator | Mar 2019 |
| 1185 | Arnot Oil Company, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2019 |
| 1186 | Arnot, W. G., Jr. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2017 |
| 1187 | Aroc (Texas) Inc. | Houston, TX 77090 | Oil & Gas Operator | May 2008 |
| 1188 | Arp Barnett, LLC | Fort Worth, TX 76102 | Gas Operator | Nov 2018 |
| 1189 | Arp Mountaineer Production, LLC | | Gas Operator | Dec 2017 |
| 1190 | Arp Oklahoma LLC | | Oil & Gas Operator | Mar 2019 |
| 1191 | Arp Production Company, LLC | Fort Worth, TX 76102 | Gas Operator | Mar 2019 |
| 1192 | Arpel, Inc. | | Oil & Gas Operator | Aug 2003 |
| 1193 | Arps Petroleum C | | Oil Operator | Jul 1987 |
| 1194 | Array Operating, LLC | Vidalia, LA 71373 | Oil & Gas Operator | Mar 2017 |
| 1195 | Arrco Operating, LLC - | Carrizo SPGS, TX 78834 | Oil Operator | Jun 2019 |
| 1196 | Arrington CJM, Inc. | Canadian, TX 79014 | Oil & Gas Operator | Jun 2019 |
| 1197 | Arrington Oil&Gas Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Jun 2019 |
| 1198 | Arrington Production Company | Pampa, TX 79066-31 | Oil & Gas Operator | Jun 2019 |
| 1199 | Arrington,David H. Oil & Gas,Inc | Midland, TX 79702 | Oil & Gas Operator | Jun 2019 |
| 1200 | Arriola Operating & Consltg Inc. | Dallas, TX 75248 | Oil Operator | Jun 2019 |