| 33001 | Wilco Oil & Gas Corporation | Oklahoma City, OK 73159-6229 | Oil & Gas Operator | Dec 2023 |
| 33002 | Wilco Oil Gas & Expl. Corp. | | Oil & Gas Operator | Mar 1979 |
| 33003 | Wilco Operating | Monahans, TX 79756 | Oil & Gas Operator | Feb 2026 |
| 33004 | Wilco Properties, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jan 2004 |
| 33005 | Wilco-Placentia Oil Operator LLC | | Oil & Gas Operator | Dec 2025 |
| 33006 | Wilcobill Corporation | | Oil Operator | Dec 1986 |
| 33007 | Wilcox Energy Company | | Oil & Gas Operator | Dec 2025 |
| 33008 | Wilcox Energy Company LLC | Rule, TX 79547 | Oil & Gas Operator | Feb 2026 |
| 33009 | Wilcox Oil Company | Rule, TX 79547 | Oil & Gas Operator | Aug 2008 |
| 33010 | Wilcox Oil, LLC | Wichita, KS 67235 | Oil Operator | Dec 2019 |
| 33011 | Wilcox Operating Company | | Oil Operator | Dec 1989 |
| 33012 | Wilcox Operating Corporation | Shreveport, LA 71115 | Oil & Gas Operator | Feb 2026 |
| 33013 | Wilcox Petroleum Operating LLC. | Rule, TX 79547 | Oil & Gas Operator | Feb 2026 |
| 33014 | Wilcox Pipe & Supply Co | Oklahoma City, OK 73189 | Oil & Gas Operator | May 2006 |
| 33015 | Wilcox Ventures, LLC | | Oil & Gas Operator | Dec 2025 |
| 33016 | Wilcoxson Brothers | Terral, OK 73569 | Oil Operator | Mar 2008 |
| 33017 | Wild Cat Operating Company | Victoria, TX 77903 | Oil & Gas Operator | Mar 2008 |
| 33018 | Wild Goose Storage LLC | | Gas Operator | Dec 2025 |
| 33019 | Wild Horse Energy | Paducah, TX 79248 | Oil & Gas Operator | Feb 2026 |
| 33020 | Wild Outdoors Oil LLC | Duncan, OK 73533 | Oil & Gas Operator | Dec 2025 |
| 33021 | Wildcat Cement Co. | Shamrock, TX 79079 | Oil & Gas Operator | May 2015 |
| 33022 | Wildcat Energy Corp | | Oil & Gas Operator | Dec 2015 |
| 33023 | Wildcat Energy, Inc. | Sedan, KS 67361 | Oil Operator | Feb 2001 |
| 33024 | Wildcat Energy, LLC | Odessa, TX 79768 | Oil & Gas Operator | Jul 2021 |
| 33025 | Wildcat Equipment Co. Inc. | | Oil Operator | Dec 1987 |
| 33026 | Wildcat Exploration, LLC | Glasgow, KY 42141 | Oil Operator | Dec 2023 |
| 33027 | Wildcat Midstream Caddo LLC | | Oil Operator | May 2017 |
| 33028 | Wildcat Oil & Gas LLC | Seneca, KS 66538 | Oil & Gas Operator | Sep 2025 |
| 33029 | Wildcat Oil, LLC | Sebree, KY 42455 | Oil Operator | Dec 2021 |
| 33030 | Wildcat Resc Inc | | Oil & Gas Operator | Nov 1992 |
| 33031 | Wildcat Resources | | Oil & Gas Operator | Jun 2016 |
| 33032 | Wildcat Well Services, LTD. | | Oil Operator | Oct 1989 |
| 33033 | Wildco Resources, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Feb 2026 |
| 33034 | Wilde, Henry & Janet | Union Springs, NY 13160 | Gas Operator | Dec 2024 |
| 33035 | Wildfire Energy Operating LLC | Houston, TX 77224 | Oil & Gas Operator | Feb 2026 |
| 33036 | Wildfire Oil & Gas Inc | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2014 |
| 33037 | Wildfire Partners Inc | Ardmore, OK 73402 | Oil & Gas Operator | Dec 2009 |
| 33038 | Wildhorse Oil | Bogue, KS 67625 | Oil Operator | Oct 1994 |
| 33039 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |
| 33040 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Feb 2026 |
| 33041 | Wildhorse Resources Management Co, LLC | | Oil & Gas Operator | Feb 2018 |
| 33042 | Wildhorse Resources MNGT Co, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2019 |
| 33043 | Wildhorse Resources, LLC | Houston, TX 77279 | Oil & Gas Operator | Feb 2015 |
| 33044 | Wildrose Resources Corp | Englewood, CO 80110-6007 | Oil & Gas Operator | Mar 2004 |
| 33045 | Wildwood Operating LLC | Hennessey, OK 73742 | Oil & Gas Operator | Nov 2025 |
| 33046 | Wiley Lease Co., LTD. | Jourdanton, TX 78026 | Oil Operator | Feb 2026 |
| 33047 | Wiley R. Ash, Jr. | | Oil & Gas Operator | Jun 1983 |
| 33048 | Wilham Investments, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Jan 2020 |
| 33049 | Wilhelm, Robert V | Russellville, KY 42276 | Gas Operator | Dec 2023 |
| 33050 | Wilhite Productions | MC Dade, TX 78650 | Oil & Gas Operator | Oct 2012 |
| 33051 | Wilkerson Oil Company | | Oil Operator | Dec 1991 |
| 33052 | Wilkes Energy Inc | Akron, OH 44308 | Oil & Gas Operator | Dec 2022 |
| 33053 | Wilkins Exploration & Production | McAlester, OK 74502-1013 | Oil & Gas Operator | Apr 2020 |
| 33054 | Wilkins L L E & O Company | Shawnee, OK 74801 | Oil & Gas Operator | Aug 2018 |
| 33055 | Wilkinson Drilli | | Oil Operator | Dec 1991 |
| 33056 | Wilkinson George R | St Augustine, FL 32080-5352 | Oil & Gas Operator | Jun 2011 |
| 33057 | Wilkinson Oil & Gas LLC | Duncan, OK 73533-2048 | Oil Operator | Nov 2025 |
| 33058 | Wilkison Richard W | Oklahoma City, OK 73107 | Oil Operator | Mar 2011 |
| 33059 | Will Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Nov 2025 |
| 33060 | Will Haristy, Jr. | | Oil & Gas Operator | Nov 2024 |
| 33061 | Will McCasland Ind | Hobbs, NM 88240 | Gas Operator | Feb 2008 |
| 33062 | Will-Drill Operating, L.L.C. | Shreveport, LA 71105 | Oil & Gas Operator | Feb 2026 |
| 33063 | Will-Drill Production Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Feb 2026 |
| 33064 | Willa Mae Overman LLC | Ponca City, OK 74601-9451 | Oil & Gas Operator | Aug 2023 |
| 33065 | Willard M Cline | Bradford, PA 16701-1715 | Oil & Gas Operator | Dec 2022 |
| 33066 | Willard Pease Drilling Co | Grand Junction, CO 81501 | Oil & Gas Operator | Dec 1983 |
| 33067 | Willey George | Newark, OH 43058 | Oil & Gas Operator | Dec 2024 |
| 33068 | William B Renfro LLC | | Oil Operator | Dec 2020 |
| 33069 | William C Bahlburg | Dallas, TX 75240 | Oil & Gas Operator | Dec 1994 |
| 33070 | William D. Pittman | | Oil & Gas Operator | Jun 1991 |
| 33071 | William E. Daniels | | Gas Operator | Dec 2013 |
| 33072 | William F. Powell | | Oil & Gas Operator | Jun 1979 |
| 33073 | William Fleming Productions, LLC | Wichita Falls, TX 76305 | Oil Operator | Feb 2025 |
| 33074 | William G Bush | Grand Junction, CO 81506 | Oil & Gas Operator | Jun 2012 |
| 33075 | William G Smith Oil, LLC | Osawatomie, KS 66064 | Oil Operator | Apr 2014 |
| 33076 | William Herbert Hunt | | Oil & Gas Operator | Mar 1986 |
| 33077 | William Jefferson Turner | Marlow, OK 73055 | Oil & Gas Operator | Apr 2007 |
| 33078 | William K. Barker & Associates | | Oil & Gas Operator | Dec 1986 |
| 33079 | William L Horner Energy | Oliveburg, PA 15764-8411 | Gas Operator | Dec 2014 |
| 33080 | William Lagnion | | Oil & Gas Operator | Aug 1998 |
| 33081 | William M Mauersberg | Sigel, PA 15860-2402 | Oil & Gas Operator | Dec 2009 |
| 33082 | William M. Williams | | Oil Operator | May 2018 |
| 33083 | William Marvin Hobbs, SR. | | Oil Operator | Aug 2002 |
| 33084 | William McIntire Coal Oil & Gas | Shelocta, PA 15774-0171 | Oil & Gas Operator | May 2022 |
| 33085 | William S Miller Inc | Hanoverton, OH 44423 | Oil & Gas Operator | Dec 2024 |
| 33086 | William Southwell & Son Oil LLC | Warren, PA 16365 | Oil & Gas Operator | Dec 2025 |
| 33087 | Williams Brothers Engineering Company | Tulsa, OK 74134-5885 | Oil & Gas Operator | May 2013 |
| 33088 | Williams Dale | Konawa, OK 74849-9211 | Oil Operator | Nov 2025 |
| 33089 | Williams Dale And Dorothy Family Trust | Maud, OK 74854-2011 | Oil & Gas Operator | Nov 2025 |
| 33090 | Williams Deville Operating, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Feb 2026 |
| 33091 | Williams Doyle Dba BCF Gas | Tulsa, OK 74114-7099 | Oil & Gas Operator | Jul 2023 |
| 33092 | Williams Exploration Company | | Oil & Gas Operator | Dec 1986 |
| 33093 | Williams Gas Pipeline Central, Inc. | Shawnee Mission, KS 66215 | Oil Operator | Sep 2010 |
| 33094 | Williams Gerald | | Oil & Gas Operator | Apr 1989 |
| 33095 | Williams Inc | | Oil Operator | Dec 2019 |
| 33096 | Williams Inspection Service Inc | Purcell, OK 73080 | Oil & Gas Operator | Jan 1999 |
| 33097 | Williams Jack H | Oklahoma City, OK 73109 | Gas Operator | Sep 1995 |
| 33098 | Williams Jack W | Ardmore, OK 73401-4726 | Oil Operator | Feb 2017 |
| 33099 | Williams Kidd Drilling Corp | Claremore, OK 74017-0846 | Oil Operator | Jun 2013 |
| 33100 | Williams M H | Red Rock, OK 74651-0311 | Oil & Gas Operator | Jun 2023 |