| 12001 | WGR, Inc. | Houston, TX 77046 | Gas Operator | Jul 2007 |
| 12002 | Wgsi Enterprise LLC | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Nov 2025 |
| 12003 | Wharton Oil Co. | Vernon, TX 76384 | Oil & Gas Operator | Dec 2000 |
| 12004 | Whatley, O. B. | Kilgore, TX 75662 | Oil & Gas Operator | Jun 1993 |
| 12005 | Whatley, O.B. Oil Company, Inc. | Bivins, TX 75555 | Oil & Gas Operator | Jun 2026 |
| 12006 | Wheat, Buck Resources, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Dec 2009 |
| 12007 | Wheeler Energy Co. | Tulsa, OK 74101 | Oil & Gas Operator | Feb 2026 |
| 12008 | Wheeler Energy, LLC | Tulsa, OK 74101 | Oil & Gas Operator | Jun 2026 |
| 12009 | Wheeler Oil Co. (A) | Amarillo, TX 79114 | Gas Operator | Apr 2001 |
| 12010 | Wheeler Operating Corporation | Fort Worth, TX 76109 | Oil & Gas Operator | Jun 2026 |
| 12011 | Whelan Brothers, Inc. | Oil City, LA 71061 | Oil & Gas Operator | May 2015 |
| 12012 | Whiskey River Oil & Gas LLC | Dallas, TX 75230 | Oil & Gas Operator | Apr 2024 |
| 12013 | Whitaker Properties, L. P. | Carthage, TX 75633 | Oil & Gas Operator | Sep 1997 |
| 12014 | Whitaker, Jerry | Sunset, TX 76270 | Oil & Gas Operator | May 2022 |
| 12015 | White Creek Energy | Three Rivers, TX 78071 | Oil & Gas Operator | Jun 2026 |
| 12016 | White Knight Production LLC | Lafayette, LA 70505 | Oil & Gas Operator | Feb 2024 |
| 12017 | White Marlin Operating Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 12018 | White Oak Operating Company LLC | Houston, TX 77077 | Oil & Gas Operator | Jun 2026 |
| 12019 | White Oak Production Company | Conway, AR 72034 | Oil & Gas Operator | Sep 2005 |
| 12020 | White Operating Company | Oklahoma City, OK 73159-7136 | Oil & Gas Operator | Feb 2026 |
| 12021 | White Pine Petroleum Corporation | Wichita, KS 67202 | Oil & Gas Operator | Dec 2019 |
| 12022 | White River Operating LLC | Gilmer, TX 75644 | Oil & Gas Operator | Dec 2025 |
| 12023 | White Rock Exploration, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Jul 2021 |
| 12024 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Jun 2026 |
| 12025 | White Sail Resources LLC | Austin, TX 78731 | Oil Operator | Jun 2026 |
| 12026 | White Sands TX LLC | Costa Mesa, CA 92626 | Oil Operator | Jun 2026 |
| 12027 | White Stride LLC | Piedmont, OK 73078 | Oil & Gas Operator | Jun 2026 |
| 12028 | White Wing Petroleum Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2012 |
| 12029 | White'S Industrial Engine'S | Houston, TX 77070 | Oil & Gas Operator | Jun 2026 |
| 12030 | White, Cecil | Monahans, TX 79756 | Oil & Gas Operator | Mar 2017 |
| 12031 | White, E. C. Oil Co. | Whiteface, TX 79379 | Oil & Gas Operator | Nov 2012 |
| 12032 | White, Frank | Abilene, TX 79604 | Oil & Gas Operator | Jun 2026 |
| 12033 | White, Jack Operating | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2026 |
| 12034 | White, Oscar | Tuscola, TX 79562 | Oil & Gas Operator | Jun 2026 |
| 12035 | White, Ralph H. | Midland, TX 79701 | Oil & Gas Operator | Oct 2002 |
| 12036 | Whitehall Operating Inc. | Houston, TX 77040 | Oil & Gas Operator | Nov 1994 |
| 12037 | Whitehawk Production Company | Midland, TX 79710 | Oil & Gas Operator | Jun 2026 |
| 12038 | Whitehead Prod. Co., Inc. | Humble, TX 77338 | Oil & Gas Operator | Feb 2026 |
| 12039 | Whitehead Resources, LTD. | Buna, TX 77612 | Oil & Gas Operator | Jun 2026 |
| 12040 | Whiteman Industries Inc | Oklahoma City, OK 73101 | Oil & Gas Operator | May 2025 |
| 12041 | Whitemound Oil Company | FT Stockton, TX 79735 | Oil & Gas Operator | Jan 2017 |
| 12042 | Whitesands Operating, L.L.C. | Corpus Chrsti, TX 78466 | Oil & Gas Operator | Mar 2025 |
| 12043 | Whitesands Resources, L.L.C. | Corpus Chrsti, TX 78466 | Oil Operator | Jun 2019 |
| 12044 | Whiteside, H. W. | Abilene, TX 79604 | Oil & Gas Operator | Nov 1998 |
| 12045 | Whiteside, Robert | Comanche, TX 76442 | Oil & Gas Operator | May 1998 |
| 12046 | Whitfield Energy | Midland, TX 79702 | Oil & Gas Operator | Jan 1999 |
| 12047 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 12048 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jan 2025 |
| 12049 | Whitlock, J.R. Operator | Amarillo, TX 79105 | Gas Operator | Jul 1997 |
| 12050 | Whitman-Dome Energy Corporation | San Diego, CA 92101 | Oil & Gas Operator | Nov 1996 |
| 12051 | Whitmar Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2026 |
| 12052 | Whitson, James A., Jr. | Houston, TX 77063 | Oil & Gas Operator | Nov 2011 |
| 12053 | Whitt Investments, Inc. | Graham, TX 76450 | Oil Operator | Dec 2019 |
| 12054 | Whitt Oil & Gas, Inc. | Albany, TX 76430 | Oil & Gas Operator | Jun 2026 |
| 12055 | Whitt, W. J. | Albany, TX 76430 | Oil & Gas Operator | Nov 1996 |
| 12056 | Whitten Energy Corp. | Houston, TX 77090 | Oil & Gas Operator | Jun 2026 |
| 12057 | Whittier Operating Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2007 |
| 12058 | Whittington Energy Co. | Melbourne, FL 32901 | Oil & Gas Operator | Jun 2026 |
| 12059 | Whittington Operating Company | Houston, TX 77069 | Oil & Gas Operator | Jun 2026 |
| 12060 | Whittington, G. R. | Amarillo, TX 79109 | Oil & Gas Operator | Jan 1994 |
| 12061 | Whittington, G. R. Estate | Amarillo, TX 79109 | Oil & Gas Operator | Mar 2008 |
| 12062 | WHL Oil Corp. | Houston, TX 77227 | Oil & Gas Operator | Sep 1998 |
| 12063 | Wichita Falls Oil Expl. Co. | Holliday, TX 76366 | Oil & Gas Operator | Jun 2026 |
| 12064 | Wichita Operating Company, Inc. | Spring, TX 77393 | Oil & Gas Operator | May 2009 |
| 12065 | Wigington, James Robert | Ackerly, TX 79713 | Oil & Gas Operator | Aug 2003 |
| 12066 | Wilbanks Energy Corporation | Houston, TX 77036 | Oil & Gas Operator | Dec 2001 |
| 12067 | Wilbanks Exploration Inc | Denver, CO 80202 | Oil & Gas Operator | May 2002 |
| 12068 | Wilbanks Reserve Corporation | Denver, CO 80203 | Oil & Gas Operator | Jun 2026 |
| 12069 | Wilbanks, Bruce & G.L. | Midland, TX 79702 | Oil & Gas Operator | Aug 1996 |
| 12070 | Wilbanks, Bruce A. | Midland, TX 79701 | Oil & Gas Operator | Aug 1996 |
| 12071 | Wilbanks, Bruce A. Company | Midland, TX 79702 | Oil & Gas Operator | Jun 2026 |
| 12072 | Wilbrook Exploration, Inc. | Lingleville, TX 76461 | Oil & Gas Operator | Aug 2003 |
| 12073 | Wilchar, DR. R. B. | Fort Worth, TX 76185 | Oil & Gas Operator | Jan 2007 |
| 12074 | Wilco Operating | Monahans, TX 79756 | Oil & Gas Operator | Jun 2026 |
| 12075 | Wilco Properties, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jan 2004 |
| 12076 | Wilcox Energy Company LLC | Rule, TX 79547 | Oil & Gas Operator | Jun 2026 |
| 12077 | Wilcox Oil Company | Rule, TX 79547 | Oil & Gas Operator | Aug 2008 |
| 12078 | Wilcox Operating Corporation | Shreveport, LA 71115 | Oil & Gas Operator | Jun 2026 |
| 12079 | Wilcox Petroleum Operating LLC. | Rule, TX 79547 | Oil & Gas Operator | Jun 2026 |
| 12080 | Wild Cat Operating Company | Victoria, TX 77903 | Oil & Gas Operator | Mar 2008 |
| 12081 | Wild Horse Energy | Paducah, TX 79248 | Oil & Gas Operator | Jun 2026 |
| 12082 | Wild Oil, LLC | Wichita Falls, TX 76308 | Oil Operator | Jun 2026 |
| 12083 | Wildcat Cement Co. | Shamrock, TX 79079 | Oil & Gas Operator | May 2015 |
| 12084 | Wildcat Energy, LLC | Odessa, TX 79768 | Oil & Gas Operator | Jul 2021 |
| 12085 | Wildco Resources, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Jun 2026 |
| 12086 | Wildfire Energy Operating LLC | Houston, TX 77224 | Oil & Gas Operator | Jun 2026 |
| 12087 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |
| 12088 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Jun 2026 |
| 12089 | Wildhorse Resources MNGT Co, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2019 |
| 12090 | Wildhorse Resources, LLC | Houston, TX 77279 | Oil & Gas Operator | Feb 2015 |
| 12091 | Wiley Lease Co., LTD. | Jourdanton, TX 78026 | Oil Operator | Jun 2026 |
| 12092 | Wilham Investments, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Jan 2020 |
| 12093 | Wilhite Productions | MC Dade, TX 78650 | Oil & Gas Operator | Oct 2012 |
| 12094 | Will Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |
| 12095 | Will-Drill Operating, L.L.C. | Shreveport, LA 71105 | Oil & Gas Operator | Jun 2026 |
| 12096 | Will-Drill Production Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Jun 2026 |
| 12097 | William Fleming Productions, LLC | Wichita Falls, TX 76305 | Oil Operator | Feb 2025 |
| 12098 | Williams Deville Operating, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Jun 2026 |
| 12099 | Williams Oil Company | Midland, TX 79710 | Oil & Gas Operator | Jun 2026 |
| 12100 | Williams Petroleum Company, Inc. | Burkburnett, TX 76354 | Oil & Gas Operator | Jun 2026 |