| 1001 | Wilcox Operating Corporation | Shreveport, LA 71115 | Oil & Gas Operator | Feb 2026 |
| 1002 | Wilcox Petroleum Operating LLC. | Rule, TX 79547 | Oil & Gas Operator | Feb 2026 |
| 1003 | Wilcox Pipe & Supply Co | Oklahoma City, OK 73189 | Oil & Gas Operator | May 2006 |
| 1004 | Wilcox Ventures, LLC | | Oil & Gas Operator | Dec 2025 |
| 1005 | Wilcoxson Brothers | Terral, OK 73569 | Oil Operator | Mar 2008 |
| 1006 | Wild Cat Operating Company | Victoria, TX 77903 | Oil & Gas Operator | Mar 2008 |
| 1007 | Wild Goose Storage LLC | | Gas Operator | Dec 2025 |
| 1008 | Wild Horse Energy | Paducah, TX 79248 | Oil & Gas Operator | Feb 2026 |
| 1009 | Wild Outdoors Oil LLC | Duncan, OK 73533 | Oil & Gas Operator | Dec 2025 |
| 1010 | Wildcat Cement Co. | Shamrock, TX 79079 | Oil & Gas Operator | May 2015 |
| 1011 | Wildcat Energy Corp | | Oil & Gas Operator | Dec 2015 |
| 1012 | Wildcat Energy, Inc. | Sedan, KS 67361 | Oil Operator | Feb 2001 |
| 1013 | Wildcat Energy, LLC | Odessa, TX 79768 | Oil & Gas Operator | Jul 2021 |
| 1014 | Wildcat Equipment Co. Inc. | | Oil Operator | Dec 1987 |
| 1015 | Wildcat Exploration, LLC | Glasgow, KY 42141 | Oil Operator | Dec 2023 |
| 1016 | Wildcat Midstream Caddo LLC | | Oil Operator | May 2017 |
| 1017 | Wildcat Oil & Gas LLC | Seneca, KS 66538 | Oil & Gas Operator | Sep 2025 |
| 1018 | Wildcat Oil, LLC | Sebree, KY 42455 | Oil Operator | Dec 2021 |
| 1019 | Wildcat Resc Inc | | Oil & Gas Operator | Nov 1992 |
| 1020 | Wildcat Resources | | Oil & Gas Operator | Jun 2016 |
| 1021 | Wildcat Well Services, LTD. | | Oil Operator | Oct 1989 |
| 1022 | Wildco Resources, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Feb 2026 |
| 1023 | Wilde, Henry & Janet | Union Springs, NY 13160 | Gas Operator | Dec 2024 |
| 1024 | Wildfire Energy Operating LLC | Houston, TX 77224 | Oil & Gas Operator | Feb 2026 |
| 1025 | Wildfire Oil & Gas Inc | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2014 |
| 1026 | Wildfire Partners Inc | Ardmore, OK 73402 | Oil & Gas Operator | Dec 2009 |
| 1027 | Wildhorse Oil | Bogue, KS 67625 | Oil Operator | Oct 1994 |
| 1028 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |
| 1029 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Feb 2026 |
| 1030 | Wildhorse Resources Management Co, LLC | | Oil & Gas Operator | Feb 2018 |
| 1031 | Wildhorse Resources MNGT Co, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2019 |
| 1032 | Wildhorse Resources, LLC | Houston, TX 77279 | Oil & Gas Operator | Feb 2015 |
| 1033 | Wildrose Resources Corp | Englewood, CO 80110-6007 | Oil & Gas Operator | Mar 2004 |
| 1034 | Wildwood Operating LLC | Hennessey, OK 73742 | Oil & Gas Operator | Nov 2025 |
| 1035 | Wiley Lease Co., LTD. | Jourdanton, TX 78026 | Oil Operator | Feb 2026 |
| 1036 | Wiley R. Ash, Jr. | | Oil & Gas Operator | Jun 1983 |
| 1037 | Wilham Investments, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Jan 2020 |
| 1038 | Wilhelm, Robert V | Russellville, KY 42276 | Gas Operator | Dec 2023 |
| 1039 | Wilhite Productions | MC Dade, TX 78650 | Oil & Gas Operator | Oct 2012 |
| 1040 | Wilkerson Oil Company | | Oil Operator | Dec 1991 |
| 1041 | Wilkes Energy Inc | Akron, OH 44308 | Oil & Gas Operator | Dec 2022 |
| 1042 | Wilkins Exploration & Production | McAlester, OK 74502-1013 | Oil & Gas Operator | Apr 2020 |
| 1043 | Wilkins L L E & O Company | Shawnee, OK 74801 | Oil & Gas Operator | Aug 2018 |
| 1044 | Wilkinson Drilli | | Oil Operator | Dec 1991 |
| 1045 | Wilkinson George R | St Augustine, FL 32080-5352 | Oil & Gas Operator | Jun 2011 |
| 1046 | Wilkinson Oil & Gas LLC | Duncan, OK 73533-2048 | Oil Operator | Nov 2025 |
| 1047 | Wilkison Richard W | Oklahoma City, OK 73107 | Oil Operator | Mar 2011 |
| 1048 | Will Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Nov 2025 |
| 1049 | Will Haristy, Jr. | | Oil & Gas Operator | Nov 2024 |
| 1050 | Will McCasland Ind | Hobbs, NM 88240 | Gas Operator | Feb 2008 |
| 1051 | Will-Drill Operating, L.L.C. | Shreveport, LA 71105 | Oil & Gas Operator | Feb 2026 |
| 1052 | Will-Drill Production Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Feb 2026 |
| 1053 | Willa Mae Overman LLC | Ponca City, OK 74601-9451 | Oil & Gas Operator | Aug 2023 |
| 1054 | Willard M Cline | Bradford, PA 16701-1715 | Oil & Gas Operator | Dec 2022 |
| 1055 | Willard Pease Drilling Co | Grand Junction, CO 81501 | Oil & Gas Operator | Dec 1983 |
| 1056 | Willey George | Newark, OH 43058 | Oil & Gas Operator | Dec 2024 |
| 1057 | William B Renfro LLC | | Oil Operator | Dec 2020 |
| 1058 | William C Bahlburg | Dallas, TX 75240 | Oil & Gas Operator | Dec 1994 |
| 1059 | William D. Pittman | | Oil & Gas Operator | Jun 1991 |
| 1060 | William E. Daniels | | Gas Operator | Dec 2013 |
| 1061 | William F. Powell | | Oil & Gas Operator | Jun 1979 |
| 1062 | William Fleming Productions, LLC | Wichita Falls, TX 76305 | Oil Operator | Feb 2025 |
| 1063 | William G Bush | Grand Junction, CO 81506 | Oil & Gas Operator | Jun 2012 |
| 1064 | William G Smith Oil, LLC | Osawatomie, KS 66064 | Oil Operator | Apr 2014 |
| 1065 | William Herbert Hunt | | Oil & Gas Operator | Mar 1986 |
| 1066 | William Jefferson Turner | Marlow, OK 73055 | Oil & Gas Operator | Apr 2007 |
| 1067 | William K. Barker & Associates | | Oil & Gas Operator | Dec 1986 |
| 1068 | William L Horner Energy | Oliveburg, PA 15764-8411 | Gas Operator | Dec 2014 |
| 1069 | William Lagnion | | Oil & Gas Operator | Aug 1998 |
| 1070 | William M Mauersberg | Sigel, PA 15860-2402 | Oil & Gas Operator | Dec 2009 |
| 1071 | William M. Williams | | Oil Operator | May 2018 |
| 1072 | William Marvin Hobbs, SR. | | Oil Operator | Aug 2002 |
| 1073 | William McIntire Coal Oil & Gas | Shelocta, PA 15774-0171 | Oil & Gas Operator | May 2022 |
| 1074 | William S Miller Inc | Hanoverton, OH 44423 | Oil & Gas Operator | Dec 2024 |
| 1075 | William Southwell & Son Oil LLC | Warren, PA 16365 | Oil & Gas Operator | Dec 2025 |
| 1076 | Williams Brothers Engineering Company | Tulsa, OK 74134-5885 | Oil & Gas Operator | May 2013 |
| 1077 | Williams Dale | Konawa, OK 74849-9211 | Oil Operator | Nov 2025 |
| 1078 | Williams Dale And Dorothy Family Trust | Maud, OK 74854-2011 | Oil & Gas Operator | Nov 2025 |
| 1079 | Williams Deville Operating, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Feb 2026 |
| 1080 | Williams Doyle Dba BCF Gas | Tulsa, OK 74114-7099 | Oil & Gas Operator | Jul 2023 |
| 1081 | Williams Exploration Company | | Oil & Gas Operator | Dec 1986 |
| 1082 | Williams Gas Pipeline Central, Inc. | Shawnee Mission, KS 66215 | Oil Operator | Sep 2010 |
| 1083 | Williams Gerald | | Oil & Gas Operator | Apr 1989 |
| 1084 | Williams Inc | | Oil Operator | Dec 2019 |
| 1085 | Williams Inspection Service Inc | Purcell, OK 73080 | Oil & Gas Operator | Jan 1999 |
| 1086 | Williams Jack H | Oklahoma City, OK 73109 | Gas Operator | Sep 1995 |
| 1087 | Williams Jack W | Ardmore, OK 73401-4726 | Oil Operator | Feb 2017 |
| 1088 | Williams Kidd Drilling Corp | Claremore, OK 74017-0846 | Oil Operator | Jun 2013 |
| 1089 | Williams M H | Red Rock, OK 74651-0311 | Oil & Gas Operator | Jun 2023 |
| 1090 | Williams Oil Company | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 1091 | Williams Operating Company LLC | Comanche, OK 73529 | Oil Operator | Nov 2025 |
| 1092 | Williams Petroleum Company, Inc. | Burkburnett, TX 76354 | Oil & Gas Operator | Feb 2026 |
| 1093 | Williams Pressure Service Co. | | Oil Operator | Sep 1985 |
| 1094 | Williams Prod. Gulf Coast, L.P. | Benbrook, TX 76126 | Oil & Gas Operator | Jan 2012 |
| 1095 | Williams Producing Co | | Oil & Gas Operator | Nov 2025 |
| 1096 | Williams Production RMT Company | Denver, CO 80202 | Oil & Gas Operator | Oct 2010 |
| 1097 | Williams Refractories Inc | Cushing, OK 74023 | Oil & Gas Operator | Feb 2015 |
| 1098 | Williams Reid Oil Co | Dallas, TX 75234 | Oil & Gas Operator | Nov 2025 |
| 1099 | Williams Robert | | Oil & Gas Operator | Apr 1995 |
| 1100 | Williams Roger F | Tulsa, OK 74152-0951 | Oil & Gas Operator | May 2013 |