| 1 | W & C Oil & Gas | | Oil Operator | Feb 1996 |
| 2 | W & K Oil Co. | | Oil & Gas Operator | Jun 1989 |
| 3 | W & L Oil Co. | | Oil Operator | Aug 1995 |
| 4 | W & T Offshore, L.L.C. | Houston, TX 77046 | Gas Operator | Jan 1999 |
| 5 | W & T Oil Properties, Inc. | | Oil & Gas Operator | Nov 1989 |
| 6 | W & W Oil, Inc. | Lovington, NM 88260 | Oil & Gas Operator | May 1999 |
| 7 | W & W Prod Compa | | Oil Operator | Oct 1995 |
| 8 | W & W Production Company, General Partnership | Chanute, KS 66720 | Oil & Gas Operator | Sep 2025 |
| 9 | W & W Production, LLC | Wichita Falls, TX 76308 | Oil Operator | Dec 2025 |
| 10 | W & W Properties | Westbrook, TX 79565 | Oil & Gas Operator | Aug 2018 |
| 11 | W & W Services, Inc. | Palestine, TX 75802 | Oil & Gas Operator | Mar 2008 |
| 12 | W 10 Holdings Inc | | Oil & Gas Operator | Dec 1998 |
| 13 | W A Lusk | | Oil & Gas Operator | Jul 2000 |
| 14 | W A Moncrief Jr | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 15 | W B Hamilton Estate | Wichita Falls, TX 76301 | Oil & Gas Operator | Jan 2021 |
| 16 | W B Osborn Oil And Gas Operations LTD | | Oil Operator | Nov 2025 |
| 17 | W B Powers Production Serv. | | Oil Operator | Feb 1991 |
| 18 | W B Yarborough | Hobbs, NM 88241 | Oil & Gas Operator | Nov 1995 |
| 19 | W Byrd Yeany Jr & Jane Wiant Yeany | Mayport, PA 16240-1105 | Gas Operator | Dec 2014 |
| 20 | W C Investments LTD | Salt Lake City, UT 84120 | Oil & Gas Operator | Aug 2000 |
| 21 | W C S Inc | Pottsboro, TX 75076 | Oil & Gas Operator | Oct 2019 |
| 22 | W C T Operating LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 2025 |
| 23 | W D L Enterprises, Inc | | Oil & Gas Operator | Apr 1983 |
| 24 | W E Jeffers | Artesia, NM 88210 | Oil Operator | Nov 2004 |
| 25 | W H Brininstool | Jal, NM 88252 | Oil & Gas Operator | Aug 2006 |
| 26 | W H Patten Drilling Co | Millersburg, OH 44654 | Oil & Gas Operator | Dec 2024 |
| 27 | W I Productions Inc | Sand Springs, OK 74063 | Oil & Gas Operator | Feb 2000 |
| 28 | W J Sweatt | Artesoa, NM 88211 | Oil Operator | Oct 2020 |
| 29 | W K Frost Inc | Newark, OH 43055 | Oil & Gas Operator | Dec 2020 |
| 30 | W M A Corporation | Wichita, KS 67278-1713 | Oil & Gas Operator | Jan 1998 |
| 31 | W M Energy Corp | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2015 |
| 32 | W M Gallaway | Farmington, NM 874990307 | Oil & Gas Operator | Jun 2013 |
| 33 | W M Petroleum LLC | Cedar Vale, KS 67024 | Oil Operator | Sep 2025 |
| 34 | W M Smith | | Oil Operator | Jun 1989 |
| 35 | W P Brown Enterprises Inc | Byesville, OH 43723 | Oil & Gas Operator | Dec 2024 |
| 36 | W P Oil & Gas LLC | Coweta, OK 74429-5465 | Oil & Gas Operator | Mar 2015 |
| 37 | W R Ericksen | Hobbs, NM 882411109 | Oil & Gas Operator | Jul 1994 |
| 38 | W S Crude Oil Purchasing Inc | Oklahoma City, OK 73129-7613 | Oil & Gas Operator | May 2008 |
| 39 | W T X Capital Investments, LLC | Wichita Falls, TX 76308 | Oil Operator | Dec 2025 |
| 40 | W W Energy Corp | | Oil & Gas Operator | Oct 2025 |
| 41 | W W Energy Corp And Flynn Energy | | Oil & Gas Operator | Oct 2024 |
| 42 | W W Pet Service, Inc | Dixon, KY 42409 | Oil & Gas Operator | Dec 2022 |
| 43 | W&S Energy LLC | Woodward, OK 73801 | Oil & Gas Operator | Sep 2022 |
| 44 | W&T Offshore, Inc. | Houston, TX 77057 | Oil & Gas Operator | Dec 2025 |
| 45 | W&W Oil And Gas, Inc. | Muenster, TX 76252 | Oil Operator | Dec 2025 |
| 46 | W&W Oil Co | Denver City, TX 79323 | Oil Operator | Jun 2002 |
| 47 | W-N Energy Corp | Tulsa, OK 74121-1468 | Oil & Gas Operator | Nov 1994 |
| 48 | W-R Oil Company | | Oil Operator | Jul 1990 |
| 49 | W. A. Boser Oil | Allegany, NY 14706 | Oil Operator | Dec 2024 |
| 50 | W. A. Moncrief | | Oil & Gas Operator | Jun 2010 |
| 51 | W. A. Parker | | Oil & Gas Operator | Jan 1981 |
| 52 | W. A. Stanberry | | Oil & Gas Operator | Nov 1988 |
| 53 | W. B. D. Oil & Gas Company | Pampa, TX 79066 | Oil & Gas Operator | Dec 1995 |
| 54 | W. B. Inabnet | | Gas Operator | Oct 1985 |
| 55 | W. B. Jayred | | Oil & Gas Operator | Aug 1982 |
| 56 | W. B. McCarter, Jr., Inc. | | Oil & Gas Operator | Dec 1995 |
| 57 | W. C. Allen | | Oil & Gas Operator | Dec 2024 |
| 58 | W. C. Emmons | | Oil Operator | Jan 2025 |
| 59 | W. D. Henry & Sons, Inc. | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 60 | W. D. Roberson | | Gas Operator | Mar 2021 |
| 61 | W. D. Short Oil Co. | | Oil Operator | Apr 2004 |
| 62 | W. D. Tarver | | Oil Operator | Aug 2005 |
| 63 | W. E. B. Well Tending Service, Inc. | Vienna, WV 26105 | Oil & Gas Operator | Nov 2011 |
| 64 | W. E. O'Malley Inc. | | Oil & Gas Operator | Jun 1991 |
| 65 | W. E. Orr | | Oil & Gas Operator | Dec 2024 |
| 66 | W. G. Darsey, III | | Oil & Gas Operator | Nov 1981 |
| 67 | W. H. Beene | | Oil & Gas Operator | Jan 2025 |
| 68 | W. H. Hunt | | Oil & Gas Operator | Jan 1984 |
| 69 | W. H. Hunt Trust Estate | | Oil & Gas Operator | Mar 1997 |
| 70 | W. H. Hunt, Et Al | | Oil & Gas Operator | Jul 1990 |
| 71 | W. Harlan Beene | | Oil Operator | Jan 2025 |
| 72 | W. Harlan Beene Et Al | | Oil Operator | Dec 2002 |
| 73 | W. J. Hamilton Operator | | Oil Operator | Aug 1978 |
| 74 | W. J. Wegman, Jr. | | Gas Operator | Dec 1991 |
| 75 | W. L. Estis | | Oil & Gas Operator | Dec 1999 |
| 76 | W. L. Puls & T. D. Rush | | Oil & Gas Operator | Dec 1980 |
| 77 | W. L. Rambo | | Oil Operator | Apr 1981 |
| 78 | W. L. Rambo, Inc. | | Oil & Gas Operator | Aug 1985 |
| 79 | W. M. Elliott Jr. | | Oil & Gas Operator | Dec 2009 |
| 80 | W. M. Inabnet Agent | | Gas Operator | Oct 1985 |
| 81 | W. M. Morgan | | Oil Operator | Jan 1985 |
| 82 | W. R. Dudley | | Oil & Gas Operator | Oct 2025 |
| 83 | W. R. G. Oil & Gas, Inc. | Arlington, TX 76013 | Oil & Gas Operator | Dec 1993 |
| 84 | W. R. Jennings, Jr. | | Oil Operator | Aug 2003 |
| 85 | W. R. Williams, Inc. | Amarillo, TX 79105 | Gas Operator | Dec 2019 |
| 86 | W. S. Hale Petroleum | | Oil & Gas Operator | Jul 2015 |
| 87 | W. S. Hale Petroleum, L.L.C. | | Oil & Gas Operator | Jan 2025 |
| 88 | W. T. Boyle & Co. | Graham, TX 76450 | Oil Operator | Mar 2008 |
| 89 | W. T. Waggoner Estate | | Oil & Gas Operator | Dec 1995 |
| 90 | W. Trich & Hallwell, Inc. | | Oil & Gas Operator | Oct 1988 |
| 91 | W. W. F. Oil Corporation | | Oil & Gas Operator | Dec 1999 |
| 92 | W. W. Melton | | Oil Operator | Sep 1983 |
| 93 | W.A. Oil Co. | Andrews, TX 79714 | Oil & Gas Operator | Aug 1997 |
| 94 | W.B.D. Oil And Gas Inc. | Pampa, TX 79066 | Oil & Gas Operator | Oct 2019 |
| 95 | W.D. Oil Company | Pampa, TX 79066 | Oil & Gas Operator | Oct 2001 |
| 96 | W.D. Short Oil Co., LLC | Oxford, KS 67119 | Oil & Gas Operator | Sep 2025 |
| 97 | W.E.S. Operating Company, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2011 |
| 98 | W.H.D., Inc. | Euless, TX 76039 | Oil & Gas Operator | Aug 1998 |
| 99 | W.I. Royalty, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Nov 2009 |
| 100 | W.I.F.T. Operating, LLC | | Oil & Gas Operator | Oct 2025 |