| 4001 | Buck Creek Associates LLC | Bartlesville, OK 74005-2091 | Oil Operator | Sep 2009 |
| 4002 | Buck Creek Freight Inc | Lusk, WY 82225 | Oil Operator | Jul 2026 |
| 4003 | Buck Enterprises LLC | Oklahoma City, OK 73150-6111 | Oil Operator | Jun 2026 |
| 4004 | Buck Exploration | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 1991 |
| 4005 | Buck Management Co. L.L.C. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Sep 2026 |
| 4006 | Buck Paul J | | Oil & Gas Operator | Feb 1995 |
| 4007 | Buck Production Co LLC | Bristow, OK 74010 | Oil & Gas Operator | Sep 2023 |
| 4008 | Buck Production Co. | Jacksboro, TX 76458 | Oil & Gas Operator | Sep 2026 |
| 4009 | Buck Wheat Resources, L.P. | Eastland, TX 76448 | Oil & Gas Operator | Sep 2026 |
| 4010 | Buck, George | Laredo, TX 78041 | Oil & Gas Operator | Aug 2003 |
| 4011 | Buck, Paul Jordan | Sedan, KS 67361 | Oil & Gas Operator | May 2026 |
| 4012 | Buckeye Corporat | | Oil Operator | Dec 1996 |
| 4013 | Buckeye Crude Expl Inc | Columbus, OH 43216-2671 | Oil & Gas Operator | Dec 1987 |
| 4014 | Buckeye Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2018 |
| 4015 | Buckeye Energy Resources | Zanesville, OH 43702-1190 | Oil & Gas Operator | Dec 1995 |
| 4016 | Buckeye Franklin Co | Zoarville, OH 44656 | Oil & Gas Operator | Dec 1996 |
| 4017 | Buckeye Oil Producing Co. | Wooster, OH 44691-129 | Oil & Gas Operator | Dec 2025 |
| 4018 | Buckeye Petroleum Company, Inc | | Oil & Gas Operator | Apr 1983 |
| 4019 | Buckeye West LLC | Wooster, OH 44691 | Oil Operator | May 2026 |
| 4020 | Buckhorn Oilfield Service Inc | Kilgore, TX 75663 | Oil Operator | Sep 2026 |
| 4021 | Buckhorn Operating LLC | MT Enterprise, TX 75681 | Oil & Gas Operator | Sep 2026 |
| 4022 | Buckhorn Petroleum | | Oil & Gas Operator | Dec 1983 |
| 4023 | Buckley, Michael T. | Sweetgrass, MT 59484 | Oil & Gas Operator | Apr 2026 |
| 4024 | Bucky LTD | | Oil Operator | Dec 2020 |
| 4025 | Bud Oil, Inc. | Duncan, OK 73534 | Oil & Gas Operator | Sep 2026 |
| 4026 | Bud'S Drilling Company, Inc. | Brookshire, TX 77423 | Oil & Gas Operator | Sep 2026 |
| 4027 | Bud'S Pumping Service Inc. | | Oil Operator | Dec 1997 |
| 4028 | Buddie Sallee | Humboldt, KS 66748 | Oil Operator | Dec 2002 |
| 4029 | Buds Oil Company | Sperry, OK 74073 | Oil & Gas Operator | Jul 2026 |
| 4030 | Buffalo Oil & Gas LLC | Oxford, KS 67119 | Oil & Gas Operator | May 2026 |
| 4031 | Buffalo Oil Corp. | Cotulla, TX 78014 | Oil & Gas Operator | Sep 2026 |
| 4032 | Buffalo Operating Corporation | Westminister, CO 80234 | Oil & Gas Operator | Dec 2001 |
| 4033 | Buffalo Properties LLC | | Oil & Gas Operator | Dec 2003 |
| 4034 | Buffalo Raider Consulting, LLC | Amarillo, TX 79119 | Oil & Gas Operator | Sep 2026 |
| 4035 | Buffalo Resources Co. | Rosenberg, TX 77471 | Oil & Gas Operator | Sep 2000 |
| 4036 | Buffalo Resources LLC | Woodward, OK 73801 | Oil & Gas Operator | Aug 2025 |
| 4037 | Buffalo Tournament Club, Inc. | Lancaster, NY 14086 | Gas Operator | Dec 2025 |
| 4038 | Buffalo Xxii Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2026 |
| 4039 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Sep 2026 |
| 4040 | Bugington Energy, LLC | Odessa, TX 79768 | Oil & Gas Operator | Apr 2018 |
| 4041 | Bulinski Richard | Wetumka, OK 74883-0056 | Oil & Gas Operator | Jan 2004 |
| 4042 | Bull Dog Oil | Bolivar, NY 14715 | Oil & Gas Operator | Dec 2025 |
| 4043 | Bull Oil Company, LLC | Livingston, TX 77351 | Oil & Gas Operator | Sep 2026 |
| 4044 | Bull Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Sep 2026 |
| 4045 | Bull Run Energy LLC | Warren, PA 16365-2215 | Oil & Gas Operator | Dec 2017 |
| 4046 | Bull Run Resources LLC | Warren, PA 16365 | Oil & Gas Operator | Dec 2025 |
| 4047 | Bullard Bros Production Co Inc | Comanche, OK 73529-0637 | Oil Operator | Mar 2015 |
| 4048 | Bullard Don W | Ardmore, OK 73401-3646 | Oil & Gas Operator | Dec 2019 |
| 4049 | Bullard Oil Company LLC | Tuttle, OK 73089-8375 | Oil Operator | May 2026 |
| 4050 | Bullards Oilfield Service Inc | Ardmore, OK 73401-3646 | Oil Operator | Sep 1999 |
| 4051 | Bulldog Disposal Inc | Laverne, OK 73848 | Oil Operator | Apr 2026 |
| 4052 | Bulldog Exploration, LP | Houston, TX 77090 | Oil & Gas Operator | Apr 2011 |
| 4053 | Bulldog Operating Company | Artesia, NM 88211 | Oil & Gas Operator | Sep 2026 |
| 4054 | Bulldog Operating Company LLC | Shreveport, LA 71101-3680 | Oil & Gas Operator | Jun 2015 |
| 4055 | Bulldog Production Inc | Seminole, OK 74868 | Oil Operator | Nov 2024 |
| 4056 | Bullet Development, LLC | Abilene, TX 79601 | Oil & Gas Operator | Sep 2026 |
| 4057 | Bullin, R. E. Operating Inc. | Levelland, TX 79336 | Oil & Gas Operator | Sep 2026 |
| 4058 | Bullin, R.E. | Levelland, TX 79336 | Oil & Gas Operator | May 1994 |
| 4059 | Bullitt Energy LLC | Peaster, TX 76485-5317 | Oil & Gas Operator | Dec 2025 |
| 4060 | Bullitt Oil | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2016 |
| 4061 | Bullock A O | Casper, WY 82604 | Oil & Gas Operator | Apr 2026 |
| 4062 | Bullock Gladys C Trust | | Oil & Gas Operator | Dec 1999 |
| 4063 | Bullseye Oilfield Service | Cunningham, KS 67035 | Oil Operator | Apr 2023 |
| 4064 | Bullseye Operating LLC | Bartlesville, OK 74005 | Oil & Gas Operator | Jun 2026 |
| 4065 | Bullseye Petrole | | Oil Operator | Oct 1992 |
| 4066 | Bullseye Petroleum, Inc. | Wichita, KS 67230 | Oil Operator | May 2026 |
| 4067 | Bulwark Oil & Gas, LLC | Graham, TX 76450 | Oil & Gas Operator | Sep 2026 |
| 4068 | Bumblebee Energy LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Jun 2026 |
| 4069 | Bummer Bruce L | Casper, WY 82602 | Oil & Gas Operator | Dec 2007 |
| 4070 | Bump, Derek M. And Karrie L. | Batavia, NY 14020 | Gas Operator | Dec 2025 |
| 4071 | Bunker Oil Corp. | | Oil & Gas Operator | Dec 1994 |
| 4072 | Bunkirt J J Oil & Gas Corporation | Powell, WY 82435 | Oil & Gas Operator | Jul 2026 |
| 4073 | Buntin Ronnie | Maramec, OK 74045-4500 | Oil & Gas Operator | Sep 2019 |
| 4074 | Bunyard Jerry L | Stroud, OK 74079 | Oil & Gas Operator | Oct 2024 |
| 4075 | Buonadonna Oil LLC | Luling, TX 78648 | Oil Operator | Sep 2026 |
| 4076 | Burch Exploratio | | Oil Operator | Mar 1991 |
| 4077 | Burchett Natural Gas, Inc. | Williamson, WV 25661 | Gas Operator | Dec 2016 |
| 4078 | Burchfield Margaret S Dba Nu-Hope Oil Company | Earlsboro, OK 74840 | Oil & Gas Operator | Jun 2026 |
| 4079 | Burdett, Alfred | Sedan, KS 67361 | Oil Operator | Aug 2008 |
| 4080 | Burdette & Wilma A Sedler | Girard, PA 16417-9102 | Gas Operator | Dec 2014 |
| 4081 | Burdette Robert S | Pomeroy, OH 45769 | Oil Operator | Dec 2025 |
| 4082 | Burdette, L W Etal LLC | Parkersburg, WV 261021485 | Oil & Gas Operator | Dec 2021 |
| 4083 | Burdick, Jeffery H | Bolivar, NY 14715 | Oil & Gas Operator | Dec 2025 |
| 4084 | Burgard, Harold H. | Clymer, NY 14724 | Gas Operator | Dec 2025 |
| 4085 | Burger, F.W. Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 4086 | Burger, Ken | Pampa, TX 79065 | Oil & Gas Operator | Sep 2026 |
| 4087 | Burgess D M Jr And Hall H E And Stinson D E | | Oil Operator | May 2000 |
| 4088 | Burgess Energy, Inc. | South Bend, TX 76481 | Oil & Gas Operator | Sep 2026 |
| 4089 | Burgess Hall Stinson Inc | | Oil Operator | Dec 2009 |
| 4090 | Burgess, Sim E. | Graham, TX 76450 | Oil & Gas Operator | Sep 2026 |
| 4091 | Burgess, W. E. | Fort Worth, TX 76147 | Oil & Gas Operator | Sep 2026 |
| 4092 | Burgly Gas & Oil Co Inc | Apollo, PA 15613-0015 | Gas Operator | Dec 2025 |
| 4093 | Burgundy Oil & Gas Of N M Inc | Midland, TX 79701 | Oil & Gas Operator | Jul 2026 |
| 4094 | Burgundy Oil & Gas, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 4095 | Buried Hills Prod. Co., Inc. | Midvale, UT 84047 | Oil Operator | Dec 2006 |
| 4096 | Burk George E | Mannford, OK 74044-0593 | Oil & Gas Operator | Oct 2015 |
| 4097 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2026 |
| 4098 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 4099 | Burk-Gunn Oil Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2018 |
| 4100 | Burkan Oil Company | Tulsa, OK 74137 | Oil & Gas Operator | Dec 1995 |