| 5001 | Carr Well Service Inc | Odessa, TX 79769 | Oil & Gas Operator | Nov 1996 |
| 5002 | Carr, Robert Alan | | Gas Operator | Dec 2021 |
| 5003 | Carraway Co. | | Oil Operator | Apr 2006 |
| 5004 | Carrell Oil Company Dba Coco | Laurel, MT 59044 | Oil Operator | Jul 2020 |
| 5005 | Carrera Energy LLC | Midland, TX 79704-5036 | Oil & Gas Operator | Jan 2025 |
| 5006 | Carrie Exploration & Development, LLC | Hays, KS 67601 | Oil & Gas Operator | Jul 2024 |
| 5007 | Carriero, John H. & Pamela A. | Angola, NY 14006 | Gas Operator | Dec 2023 |
| 5008 | Carrizo (Eagle Ford) LLC | Houston, TX 77042 | Oil & Gas Operator | Jan 2020 |
| 5009 | Carrizo (Marcellus) LLC | Houston, TX 77002-5018 | Gas Operator | Jun 2019 |
| 5010 | Carrizo (Permian) LLC | Houston, TX 77042 | Oil & Gas Operator | Jan 2020 |
| 5011 | Carrizo (Utica) LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2017 |
| 5012 | Carrizo Exploration, Inc. | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Aug 2016 |
| 5013 | Carrizo Niobrara LLC | | Oil & Gas Operator | Aug 2017 |
| 5014 | Carrizo Oil & Gas, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 5015 | Carrland Oil & Gas Inc. | Prosper, TX 75078 | Oil & Gas Operator | May 2025 |
| 5016 | Carroll Energy, LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Nov 2023 |
| 5017 | Carroll M R Dba Carroll Production Company | Sapulpa, OK 74066 | Oil & Gas Operator | Mar 2025 |
| 5018 | Carroll Oil Prod | | Oil Operator | Jan 1986 |
| 5019 | Carroll Operating, LLC | Abilene, TX 79608 | Oil & Gas Operator | Feb 2022 |
| 5020 | Carroll Resources | Loudonville, OH 44842 | Oil & Gas Operator | Dec 1998 |
| 5021 | Carroll T L Ente | | Gas Operator | Aug 1989 |
| 5022 | Carroll, Alvis J. | Wichita Falls, TX 76302 | Oil & Gas Operator | Mar 2008 |
| 5023 | Carroll, Jon M. | Great Bend, KS 67530 | Oil Operator | Dec 2001 |
| 5024 | Carrollton Resources Corp. | | Oil & Gas Operator | Sep 2000 |
| 5025 | Carruth David C Family Trust | Russellville, AR 72811-2061 | Oil Operator | Aug 2002 |
| 5026 | Carruth Oil & Gas, LLC | Andrews, TX 79714 | Oil & Gas Operator | May 2025 |
| 5027 | Carruth, Chris | Andrews, TX 79714 | Oil & Gas Operator | Nov 2017 |
| 5028 | Carson Assoc, Inc | Ashland, KY 41102 | Oil & Gas Operator | Dec 2013 |
| 5029 | Carson Buckles Exploration LLC | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 5030 | Carson Dominguez Real Est Corp | | Oil & Gas Operator | Dec 1996 |
| 5031 | Carstan Petroleu | | Oil Operator | May 1983 |
| 5032 | Cart Hill Energy, LLC | Hobbs, NM 88240 | Oil & Gas Operator | Mar 2025 |
| 5033 | Carter & Rorex | | Oil Operator | Dec 1991 |
| 5034 | Carter Cattle & Crude Company | Luling, TX 78648 | Oil & Gas Operator | May 2025 |
| 5035 | Carter County Salt Water Disposal Inc | Wilson, OK 73463 | Oil Operator | Jan 2025 |
| 5036 | Carter Donald L | Sand Springs, OK 74063-8105 | Oil Operator | May 2006 |
| 5037 | Carter E&P, LLC | Johnson City, TX 78636 | Oil & Gas Operator | Dec 2016 |
| 5038 | Carter Energy Corporation | Duncanville, TX 75138 | Oil & Gas Operator | Sep 2010 |
| 5039 | Carter Exploration Company | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Feb 2015 |
| 5040 | Carter Oil And Gas Inc | Richmond, VA 23219 | Oil & Gas Operator | Dec 2011 |
| 5041 | Carter Oil Co | | Oil & Gas Operator | Dec 2013 |
| 5042 | Carter Preston Drilling Co | Davis, OK 73030 | Gas Operator | Nov 2000 |
| 5043 | Carter Resources | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2005 |
| 5044 | Carter, Calvin Gene | Sedan, KS 67361 | Oil Operator | Nov 2018 |
| 5045 | Carter, Eugene J. | Longton, KS 67352 | Oil Operator | Jan 1998 |
| 5046 | Carter, Gertrude (Trudy) | Rockwall, TX 75032 | Oil & Gas Operator | Apr 2013 |
| 5047 | Carter, Mattye Family Trust | Fort Worth, TX 76109 | Oil & Gas Operator | Oct 2002 |
| 5048 | Carter, Mattye L., Estate Of | Gladewater, TX 75647 | Oil & Gas Operator | Feb 1995 |
| 5049 | Carter, Shirley Oil Co | Round Rock, TX 78665 | Oil & Gas Operator | Jun 2018 |
| 5050 | Carter, Thomas J. | Dallas, TX 75225 | Oil & Gas Operator | Nov 1995 |
| 5051 | Carter-Langham, Inc. | Dallas, TX 75205 | Oil & Gas Operator | May 2025 |
| 5052 | Carter-Waters Corp. | | Oil Operator | Dec 1988 |
| 5053 | Cartex Production | Pampa, TX 79066 | Oil & Gas Operator | May 2025 |
| 5054 | Cartex Production Corp. | Pampa, TX 79066 | Oil & Gas Operator | Nov 2000 |
| 5055 | Cartledge & Cartledge Oil Company Inc | Kiefer, OK 74041 | Oil & Gas Operator | Mar 2025 |
| 5056 | Cartledge Energy LLC | Sapulpa, OK 74066-6623 | Oil & Gas Operator | Feb 2025 |
| 5057 | Caruthers Operating Co., Inc. | | Oil & Gas Operator | Jul 2010 |
| 5058 | Caruthers Producing Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2019 |
| 5059 | Carver Harry | Oklahoma City, OK 73120 | Oil & Gas Operator | Nov 2000 |
| 5060 | Cary Oil & Gas, Inc | Decatur, TX 76234 | Oil & Gas Operator | May 2025 |
| 5061 | Casa Grande Exploration Company | Casa Grande, AZ 85194 | Oil & Gas Operator | Jan 2025 |
| 5062 | Casa Oil And Gas Company | George West, TX 78022 | Gas Operator | Sep 2005 |
| 5063 | Casa Operations | Borger, TX 79007 | Oil & Gas Operator | May 2025 |
| 5064 | Cascade Oil (Dba) | Ness City, KS 67560 | Oil Operator | Mar 1998 |
| 5065 | Cascade Oil And Gas, Inc | | Oil & Gas Operator | Jun 2005 |
| 5066 | Cascade Oil Comp | | Oil & Gas Operator | Dec 1994 |
| 5067 | Cascade Petroleum Corporation | Quitman, TX 75783 | Oil & Gas Operator | Mar 2002 |
| 5068 | Cascade Petroleum Inc | North Canton, OH 44720-4244-4244 | Oil & Gas Operator | Dec 1992 |
| 5069 | Cascade Petroleum LLC | | Oil & Gas Operator | Nov 2015 |
| 5070 | Cascade Resources LLC | Edmond, OK 73083 | Oil & Gas Operator | Mar 2025 |
| 5071 | Casco Energy, Inc. | Denison, TX 75020 | Oil & Gas Operator | May 1996 |
| 5072 | Case Brothers Inc. | Limestone, NY 14753 | Oil & Gas Operator | Dec 2023 |
| 5073 | Case Drilling Company | Philpot, KY 42366 | Oil Operator | Dec 2019 |
| 5074 | Case Oil | Burkburnett, TX 76354 | Oil & Gas Operator | May 2025 |
| 5075 | Case Oil & Gas I | | Oil & Gas Operator | Apr 1992 |
| 5076 | Case Resources, LLC | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 5077 | Case Sales Company Inc | Tonkawa, OK 74653-0040 | Oil & Gas Operator | Jan 2025 |
| 5078 | Case'S Used Equipment | | Oil & Gas Operator | Feb 2025 |
| 5079 | Case, C. W. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 5080 | Casebeer, Inc. | McPherson, KS 67460 | Oil Operator | Jan 2025 |
| 5081 | Casella Charles J | Avonmore, PA 15618-1028 | Oil & Gas Operator | Dec 2015 |
| 5082 | Casex Company | | Oil & Gas Operator | Dec 2007 |
| 5083 | Casey Musgrove Oil Company Inc | Ponca City, OK 74602 | Oil & Gas Operator | Feb 2025 |
| 5084 | Casey, Carl D | | Oil Operator | Sep 2024 |
| 5085 | Casey, W. J. | Fairfield, TX 75840 | Oil & Gas Operator | May 2025 |
| 5086 | Cash Flow Oil | | Oil Operator | Jul 2003 |
| 5087 | Cashco Energy Corporation | | Oil & Gas Operator | Feb 1982 |
| 5088 | Cashco Oil Company | Houston, TX 77024 | Oil & Gas Operator | Aug 2003 |
| 5089 | Cashco, L.L.C. | Houston, TX 77024 | Oil & Gas Operator | Jul 1999 |
| 5090 | Cashion, Lyle, Company | Brandon, MS 39047 | Oil & Gas Operator | May 2008 |
| 5091 | Casias Oil Well Service, Inc. | San Antonio, TX 78232 | Oil & Gas Operator | Jul 2020 |
| 5092 | Casillas Operating LLC | Tulsa, OK 74103-4060 | Oil & Gas Operator | Mar 2025 |
| 5093 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Mar 2025 |
| 5094 | Casino Petroleum | | Oil Operator | Dec 1996 |
| 5095 | Caskids Operating Company | Houston, TX 77027 | Oil & Gas Operator | May 2025 |
| 5096 | Cason William J | Santee, CA 92071-2765 | Oil Operator | Sep 2019 |
| 5097 | Caspen Oil, Inc. | Denver, CO 80226 | Oil & Gas Operator | Jul 1993 |
| 5098 | Caspen Operating Company | Somerset, TX 78069 | Oil & Gas Operator | Mar 2008 |
| 5099 | Casper Oil & Gas | Bandera, TX 78003 | Oil & Gas Operator | Oct 2002 |
| 5100 | Cass Donna Marie | North East, PA 16428-5530 | Gas Operator | Dec 2019 |