| 1701 | CMW Oil Company | | Oil & Gas Operator | Dec 1976 |
| 1702 | CMX Inc Of Kansas | Wichita, KS 67206-2561 | Oil & Gas Operator | Jul 2025 |
| 1703 | CMX, Inc. | Wichita, KS 67206 | Oil & Gas Operator | May 2025 |
| 1704 | CN Operating Company | Drumright, OK 74030 | Oil & Gas Operator | Nov 1998 |
| 1705 | CNC Oil Co., Inc. | | Oil Operator | Aug 1991 |
| 1706 | CNG Development Co | | Oil & Gas Operator | Dec 2008 |
| 1707 | CNG Producing | New Orleans, LA 70112-6000 | Oil & Gas Operator | Jun 2000 |
| 1708 | CNG Producing Co.-Tulsa Div. | | Oil & Gas Operator | Jun 1986 |
| 1709 | CNG Producing Company | New Orleans, LA 70112 | Oil & Gas Operator | Dec 2015 |
| 1710 | CNS Energy, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2010 |
| 1711 | CNX Gas Company LLC | Canonsburg, PA 15317 | Oil & Gas Operator | Jun 2025 |
| 1712 | Co Energy | Benbrook, TX 76126 | Oil & Gas Operator | Sep 2025 |
| 1713 | Co-Co Incorporat | | Oil Operator | Oct 1989 |
| 1714 | Co-Co Oil, Inc. | Lubbock, TX 79407 | Oil & Gas Operator | Aug 2003 |
| 1715 | Co-St Oil Operating Co Inc | Enid, OK 73706 | Oil & Gas Operator | Apr 1997 |
| 1716 | Co-Wil-Co, Incorporated | | Oil Operator | Dec 1990 |
| 1717 | Coachman Energy Operating Company LLC | Englewood, CO 80111 | Oil & Gas Operator | May 2024 |
| 1718 | Coal Creek Energy, LLC | Overland Park, KS 66221 | Oil Operator | Dec 2019 |
| 1719 | Coal Creek Minerals LLC | Northglenn, CO 80234 | Gas Operator | Feb 2012 |
| 1720 | Coal Gas Recovery II LLC | Waynesburg, PA 15370 | Gas Operator | Dec 2017 |
| 1721 | Coal Gas Recovery LLC | Waynesburg, PA 15370-2330 | Gas Operator | Dec 2012 |
| 1722 | Coal Gas Recovery LP | Linthicum Heights, MD 21090-2227 | Gas Operator | Dec 2010 |
| 1723 | Coal Gas Transportation LLC | Cadiz, OH 43907 | Gas Operator | Dec 2016 |
| 1724 | Coal Oil & Gas Company | Ada, OK 74820 | Oil & Gas Operator | Jun 2025 |
| 1725 | Coal Oil Inc. | | Oil & Gas Operator | Dec 1997 |
| 1726 | Coaleum Corporation | Dallas, TX 75205 | Oil & Gas Operator | Jan 2001 |
| 1727 | Coalinga Corporation | Houston, TX 77002 | Oil & Gas Operator | May 1999 |
| 1728 | Coaltech, Inc. | | Gas Operator | Jun 1993 |
| 1729 | Coark Dev, Inc | Pikeville, KY 41502 | Oil & Gas Operator | Dec 2023 |
| 1730 | Coast David | Bartlesville, OK 74006-0407 | Oil & Gas Operator | Jun 2025 |
| 1731 | Coast Exploration Co. | | Oil & Gas Operator | Nov 1997 |
| 1732 | Coast Supply Company LTD. | | Oil & Gas Operator | Dec 1991 |
| 1733 | Coastal Bend Petroleum Corp. | Corpus Chrsti, TX 78427 | Oil & Gas Operator | Dec 2002 |
| 1734 | Coastal Chem Inc | Midvale, UT 84047 | Oil & Gas Operator | Aug 2003 |
| 1735 | Coastal Expanse Oil & Gas | Austin, TX 78704 | Oil & Gas Operator | Sep 2025 |
| 1736 | Coastal Investments Inc. | El Campo, TX 77437 | Oil & Gas Operator | Sep 2025 |
| 1737 | Coastal Management Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 1738 | Coastal Minerals, Inc. | | Oil Operator | Aug 1991 |
| 1739 | Coastal New Mexico MGMT LLC | Carlsbad, NM 88220 | Oil & Gas Operator | Sep 2025 |
| 1740 | Coastal Oil & Ga | | Oil & Gas Operator | Oct 1996 |
| 1741 | Coastal Oil & Gas | | Oil & Gas Operator | Jul 1995 |
| 1742 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 1743 | Coastal Oils Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2013 |
| 1744 | Coastal Petro Corp | Oil City, PA 16301-6327 | Oil & Gas Operator | Jul 2018 |
| 1745 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Sep 2025 |
| 1746 | Coastal Plains Exploration, LLC | Port Lavaca, TX 77979 | Oil & Gas Operator | Sep 2025 |
| 1747 | Coastal Production Company, Inc. | El Campo, TX 77437 | Oil & Gas Operator | Aug 1995 |
| 1748 | Coastal Production Inc. | | Oil & Gas Operator | Aug 2000 |
| 1749 | Coastal Shoreline Corp. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Aug 2003 |
| 1750 | Coastal States & Emerald Oil | | Oil & Gas Operator | Dec 1979 |
| 1751 | Coastal States Gas Prod. Co. | | Oil & Gas Operator | Jun 1996 |
| 1752 | Coastland Operations, LLC | Dallas, TX 75287 | Oil & Gas Operator | Sep 2025 |
| 1753 | Coastline Exploration, Inc. | Stafford, TX 77477 | Oil & Gas Operator | Sep 2025 |
| 1754 | Coastline Operating, L.L.C. | Houston, TX 77027 | Oil & Gas Operator | Dec 2006 |
| 1755 | Coates Energy Interests, LTD. | San Antonio, TX 78217 | Oil & Gas Operator | Aug 1997 |
| 1756 | Coates Energy Trust | San Antonio, TX 78209 | Oil & Gas Operator | Aug 2008 |
| 1757 | Coats Energy, Inc. | Wichita, KS 67201 | Oil & Gas Operator | May 2025 |
| 1758 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | May 2025 |
| 1759 | Cobalt Environmental Solutions LLC | Oklahoma City, OK 73101-0249 | Oil Operator | Jun 2019 |
| 1760 | Cobalt Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Feb 2025 |
| 1761 | Cobb, E M | Henderson, KY 42420 | Oil Operator | Dec 2022 |
| 1762 | Cobb, Maurice W | | Oil Operator | Dec 2023 |
| 1763 | Cobb, Maurice W Dba M W C Oil Co | Eddyville, KY 42038 | Oil Operator | Dec 2022 |
| 1764 | Cobbs Brothers Oil & Gas | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Jun 2009 |
| 1765 | Cobham Gas Industries, Inc. | | Oil & Gas Operator | Dec 2006 |
| 1766 | Cobopco Inc | Tulsa, OK 74103-4391 | Oil & Gas Operator | Feb 1997 |
| 1767 | Cobra Oil & Gas | | Oil & Gas Operator | Jul 1995 |
| 1768 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2025 |
| 1769 | Cobra Operating Company | Houston, TX 77002 | Oil & Gas Operator | Sep 2003 |
| 1770 | Cobra Petroleum Production Corp | | Oil & Gas Operator | Dec 2018 |
| 1771 | Cobra Resources LLC | N Jackson, OH 44451 | Oil & Gas Operator | Dec 2024 |
| 1772 | Cobra-Lyons-Hilliard-Watson | | Oil & Gas Operator | Jun 1992 |
| 1773 | Cochise Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 1774 | Cochon Properties, LLC | | Oil & Gas Operator | Aug 2016 |
| 1775 | Cochran Industrial Corporation | Cushing, OK 74023-1427 | Oil & Gas Operator | Apr 2001 |
| 1776 | Cochrane Resources Inc | Roosevelt, UT 84066 | Oil & Gas Operator | Jul 2025 |
| 1777 | Cockburn Oil Corporation | Lubbock, TX 79493 | Oil & Gas Operator | Jul 2005 |
| 1778 | Cockrell Oil Corporation | Houston, TX 77002-7348 | Oil & Gas Operator | Feb 2001 |
| 1779 | Cockrell Production Co., Inc. | Irving, TX 75014 | Oil & Gas Operator | Sep 2025 |
| 1780 | Cockriel Petroleum | | Oil & Gas Operator | Dec 1993 |
| 1781 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 1782 | Cody & Krysti Hunsperger | Osawatomie, KS 66064 | Oil Operator | Mar 2024 |
| 1783 | Cody C. Beasley | | Oil & Gas Operator | Apr 1987 |
| 1784 | Cody Company | Amarillo, TX 79121 | Oil & Gas Operator | Mar 2020 |
| 1785 | Cody Energy LLC | Houston, TX 77024 | Oil & Gas Operator | Jun 2020 |
| 1786 | Cody Energy, Inc. | Houston, TX 77077 | Oil & Gas Operator | Jul 2025 |
| 1787 | Cody Operating, Inc. | | Oil & Gas Operator | Jun 2025 |
| 1788 | Cody Resources, Inc. | Midland, TX 79705 | Oil & Gas Operator | Sep 2002 |
| 1789 | Cody, Ken L. | Longton, KS 67352 | Oil & Gas Operator | Mar 2025 |
| 1790 | Cody, Nancy M. | Fredonia, KS 66736 | Oil Operator | Jun 1998 |
| 1791 | Cody, Patricia H | | Oil & Gas Operator | Nov 2007 |
| 1792 | Coe Production Company | Talala, OK 74080-0264 | Oil & Gas Operator | Aug 2015 |
| 1793 | Coe Production Company LLC | Talala, OK 74080 | Oil Operator | May 2025 |
| 1794 | Coelho & Case Oil Company | | Oil & Gas Operator | Dec 1997 |
| 1795 | Coen Energy | | Oil Operator | Mar 1995 |
| 1796 | Coen Energy Corporation | Overland Park, KS 66221 | Oil Operator | May 2025 |
| 1797 | Coenergy Operating Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 1798 | Coert Holdings 1 LLC | Greenwich, CT 06830 | Oil & Gas Operator | Dec 2021 |
| 1799 | Cofer & Co LLC | Hobbs, NM 88240 | Oil & Gas Operator | Apr 2025 |
| 1800 | Cofer & Crawford | Pampa, TX 79066 | Oil & Gas Operator | Sep 2025 |