| 4701 | Callaway Oil & Gas LLC | Gillette, WY 82717 | Oil & Gas Operator | Sep 2025 |
| 4702 | Callaway Production Co., Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 1996 |
| 4703 | Calley, Bob | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 4704 | Callie Oil Company LLC | Perry, OK 73077 | Oil & Gas Operator | Oct 2025 |
| 4705 | Callon (Eagle Ford) LLC | Houston, TX 77042 | Oil & Gas Operator | Jun 2023 |
| 4706 | Callon (Permian) LLC | Houston, TX 77042 | Oil & Gas Operator | Jul 2024 |
| 4707 | Callon Offshore Production, Inc. | Natchez, MS 39121 | Oil & Gas Operator | Dec 2005 |
| 4708 | Callon Oil Co, Cambell | | Oil & Gas Operator | Oct 1984 |
| 4709 | Callon Permian II, LLC | Houston, TX 77056 | Oil & Gas Operator | Jul 2024 |
| 4710 | Callon Petroleum Company | Natchez, MS 39120 | Oil & Gas Operator | Jan 2000 |
| 4711 | Callon Petroleum Operating Co | Houston, TX 77042 | Oil & Gas Operator | Jul 2024 |
| 4712 | Calnrg Operating LLC | | Oil & Gas Operator | Sep 2025 |
| 4713 | Calpetco III-Teel 77 A | | Gas Operator | May 1980 |
| 4714 | Calpetco-Herbst Expl. Inc. | | Gas Operator | Jan 1990 |
| 4715 | Calpine Natural Gas Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2002 |
| 4716 | Calpine Natural Gas Company L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 4717 | Calpine Natural Gas L.P. | Houston, TX 77002 | Oil & Gas Operator | Dec 2005 |
| 4718 | Calresources LLC | | Oil & Gas Operator | Dec 1996 |
| 4719 | Caltex Energy Co. | Luling, TX 78648 | Oil & Gas Operator | Dec 2025 |
| 4720 | Caltico Oil Corp. | | Oil Operator | Sep 2025 |
| 4721 | Calto Operating Company, Inc. | Dallas, TX 75225 | Oil & Gas Operator | May 2004 |
| 4722 | Calumet Lubricants Company | | Oil Operator | Dec 1993 |
| 4723 | Calumet Oil Company | Oklahoma City, OK 73114 | Oil & Gas Operator | Feb 2019 |
| 4724 | Calumet Refining Co. | | Oil Operator | May 1991 |
| 4725 | Calvert Drilling Co. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jan 1992 |
| 4726 | Calvert Exploration Co | | Oil & Gas Operator | Apr 1993 |
| 4727 | Calvert Operating LLC | Oklahoma City, OK 73118 | Oil Operator | Sep 2025 |
| 4728 | Calvin Explorati | | Oil & Gas Operator | Oct 1991 |
| 4729 | Calvin F Tennison | Granbury, TX 76049 | Oil & Gas Operator | Apr 2007 |
| 4730 | Calvin Noah, LLC | Valley Center, KS 67147 | Oil Operator | Jun 2025 |
| 4731 | Calyx Energy III LLC | Tulsa, OK 74136-4226 | Oil & Gas Operator | Sep 2025 |
| 4732 | Calyx Energy LLC | Tulsa, OK 74146-3807 | Oil & Gas Operator | Feb 2020 |
| 4733 | Calyx Exploration & Production | | Oil & Gas Operator | Jul 1991 |
| 4734 | Cam Company | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 2004 |
| 4735 | Cam Consultants Inc | Akron, OH 44309 | Oil & Gas Operator | Dec 2023 |
| 4736 | Cam Development | | Oil & Gas Operator | Dec 1990 |
| 4737 | Camar Exploration | | Oil Operator | Jan 1989 |
| 4738 | Cambern, Rex | Montgomery, TX 77356 | Oil Operator | Jan 1996 |
| 4739 | Cambria Corporation | Great Bend, KS 67530 | Oil & Gas Operator | Dec 2019 |
| 4740 | Cambria Oil Company | Casper, WY 82601 | Oil & Gas Operator | Dec 1996 |
| 4741 | Cambrian Hunter Inc | Jefferson, OH 44047 | Oil & Gas Operator | Dec 2024 |
| 4742 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | Dec 2025 |
| 4743 | Cambrian Oil Inc | Odessa, TX 79760 | Oil & Gas Operator | Aug 1996 |
| 4744 | Cambridge Energy Corporation | | Oil & Gas Operator | Jul 2003 |
| 4745 | Cambridge Production, Inc. | Amarillo, TX 79120 | Oil & Gas Operator | Nov 2020 |
| 4746 | Cambron, Paul L. | Ness City, KS 67560 | Oil & Gas Operator | Dec 2019 |
| 4747 | Camco Resources, Inc. | | Oil Operator | Aug 1991 |
| 4748 | Camco Saltwater Transport | George West, TX 78022 | Oil Operator | Feb 2015 |
| 4749 | Camco Saltwater Transport,L.L.C. | George West, TX 78022 | Oil Operator | Dec 2025 |
| 4750 | Camco, Inc | Columbia, KY 42728 | Oil Operator | Dec 2023 |
| 4751 | Camden Oil & Gas, Inc. | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Dec 2005 |
| 4752 | Camden Reserves, Inc. | Houston, TX 77019 | Oil & Gas Operator | Mar 2011 |
| 4753 | Camden Resources, Inc. | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Apr 2008 |
| 4754 | Camden Resources, LLC | Blanchard, OK 73010 | Oil & Gas Operator | Dec 2015 |
| 4755 | Camelot Oil And Gas, LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2003 |
| 4756 | Cameron & Kincaid | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1986 |
| 4757 | Cameron Brothers | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1995 |
| 4758 | Cameron Development Co., Inc. | | Oil & Gas Operator | Mar 1988 |
| 4759 | Cameron Energy Co | Sheffield, PA 16347-2642 | Oil & Gas Operator | Dec 2024 |
| 4760 | Cameron Engineering, Inc | Montgomery, TX 77356 | Oil & Gas Operator | Jun 2003 |
| 4761 | Cameron Exploration, Inc. | Longview, TX 75604 | Oil & Gas Operator | Dec 2025 |
| 4762 | Cameron LNG, LLC | | Oil Operator | Jan 2025 |
| 4763 | Cameron Oil & Gas Company | | Gas Operator | Dec 2016 |
| 4764 | Cameron Oil & Gas Inc | Hobbs, NM 88240 | Oil & Gas Operator | Sep 2025 |
| 4765 | Cameron Production Co Inc | Zanesville, OH 43701 | Oil & Gas Operator | Dec 2024 |
| 4766 | Cameron Properties | Columbus, OH 43220 | Oil & Gas Operator | Dec 1996 |
| 4767 | Cameron, Paul E., Jr., Inc. | Montgomery, TX 77356 | Oil & Gas Operator | May 2015 |
| 4768 | Camex Operating Company | | Oil & Gas Operator | Dec 2024 |
| 4769 | Camex, Inc. | | Oil & Gas Operator | Jun 1992 |
| 4770 | Camexco, Inc. | Houston, TX 77058 | Oil & Gas Operator | Dec 2025 |
| 4771 | Caminar Oil & Gas, LLC | Abilene, TX 79602 | Oil & Gas Operator | Aug 2024 |
| 4772 | Camino Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 4773 | Camino Real Technologies Inc | Temple, TX 76502 | Oil Operator | Dec 2025 |
| 4774 | Camio Enterprises, LLC | Augusta, KS 67010 | Oil Operator | Jun 2025 |
| 4775 | Camio Oil Co. | | Oil Operator | Dec 2004 |
| 4776 | Camio Oil Compan | | Oil & Gas Operator | Apr 1991 |
| 4777 | Camo Oil LLC | Stillwater, OK 74074 | Oil & Gas Operator | Oct 2025 |
| 4778 | Camoil, Inc. | Columbus, TX 78934 | Oil & Gas Operator | Dec 2025 |
| 4779 | Camp Dennis | Ratliff City, OK 73081 | Oil & Gas Operator | Nov 2018 |
| 4780 | Campana Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 4781 | Campanella, George L | Great Falls, MT 59403 | Oil & Gas Operator | Sep 2025 |
| 4782 | Campbell & Assoc.-Ring | | Oil Operator | Nov 1980 |
| 4783 | Campbell & Associates | | Oil & Gas Operator | Aug 1987 |
| 4784 | Campbell & Hedrick | Midland, TX 79702 | Oil & Gas Operator | Jun 2014 |
| 4785 | Campbell B R | Ardmore, OK 73401 | Oil & Gas Operator | Oct 2002 |
| 4786 | Campbell Co. Et Al | | Oil Operator | Apr 1986 |
| 4787 | Campbell Dale H | McKeesport, PA 15135-3307 | Gas Operator | Dec 2017 |
| 4788 | Campbell Don G | Konawa, OK 74849 | Oil Operator | Feb 1997 |
| 4789 | Campbell Energy Corporation | | Oil & Gas Operator | May 1992 |
| 4790 | Campbell Energy LLC | Carmi, IL 62821 | Oil Operator | Jun 2025 |
| 4791 | Campbell Oil & Gas Inc | Indiana, PA 15701-0278 | Oil & Gas Operator | Sep 2025 |
| 4792 | Campbell Production Company | Tulsa, OK 74137-4145 | Oil & Gas Operator | Mar 2015 |
| 4793 | Campbell Robert | | Oil & Gas Operator | Aug 1990 |
| 4794 | Campbell Wells Corporation | | Oil Operator | Dec 1995 |
| 4795 | Campbell, G S | Park City, UT 84060 | Oil & Gas Operator | Apr 1991 |
| 4796 | Campbell, George M. | Lubbock, TX 79490 | Oil & Gas Operator | Apr 2003 |
| 4797 | Campbell, Robert E. | Wichita, KS 67206 | Oil & Gas Operator | May 2019 |
| 4798 | Campbell, T. K. | Fort Worth, TX 76118 | Oil & Gas Operator | Mar 2006 |
| 4799 | Campground Corporation | | Oil Operator | Nov 2023 |
| 4800 | Camphire George E. | Danville, OH 43014 | Oil & Gas Operator | Dec 2024 |