| 1701 | Clinton, Orville L., Jr. | Paola, KS 66071 | Oil Operator | Apr 2005 |
| 1702 | Clipper Operating Co., Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Jan 2000 |
| 1703 | CLK Energy Partners, LLC | | Oil & Gas Operator | Aug 2018 |
| 1704 | CLM Oil Production Inc | Bartlesville, OK 74006-4417 | Oil & Gas Operator | Nov 2025 |
| 1705 | CLM Operating | Graham, TX 76450 | Oil & Gas Operator | Aug 2017 |
| 1706 | Cloer VIrgil R | Oklahoma City, OK 73121 | Oil & Gas Operator | Apr 1993 |
| 1707 | Clofas Case Oil Co. | | Oil & Gas Operator | Nov 2025 |
| 1708 | Close, Bryan H. | Shamrock, TX 79079 | Gas Operator | Feb 2026 |
| 1709 | Clothier, David W. | Eastborough, KS 67206 | Oil & Gas Operator | Dec 2019 |
| 1710 | Cloud Peak Operating LLC | Casper, WY 82601 | Oil Operator | Dec 2025 |
| 1711 | Clovelly DRLG & Dev Co Inc | | Oil & Gas Operator | Oct 1983 |
| 1712 | Clovelly Oil Co. LLC | | Oil & Gas Operator | Nov 2024 |
| 1713 | Clovelly Oil Co., Inc. | | Oil & Gas Operator | Nov 2008 |
| 1714 | Clovelly Oil Co., Inc. - Ripco | | Oil & Gas Operator | Nov 1991 |
| 1715 | Clover Energy Corp | | Oil & Gas Operator | May 1980 |
| 1716 | Clover Oil Company | | Oil Operator | Sep 2025 |
| 1717 | Clover Production Company | Sourlake, TX 77659 | Oil & Gas Operator | Feb 2026 |
| 1718 | Clowser Well Service, Inc. | | Oil & Gas Operator | Dec 2021 |
| 1719 | CLR Gauging Corp. | Tuleta, TX 78162 | Oil & Gas Operator | Feb 2026 |
| 1720 | CLR Secondary Recovery, LLC | Wichita Falls, TX 76306 | Oil & Gas Operator | Feb 2026 |
| 1721 | CLS Interests, Incorporated | Austin, TX 78734 | Oil & Gas Operator | Jan 1997 |
| 1722 | CLS Petroleum Holdings LLC | Iowa Park, TX 76367 | Oil Operator | Feb 2026 |
| 1723 | Clsog L.C. | Houston, TX 77024 | Gas Operator | Jun 2008 |
| 1724 | Clubine, Jim L. | Independence, KS 67301 | Oil Operator | Aug 2025 |
| 1725 | Clute Oil Corporation | Cherry Hills VIllage, CO 80113 | Oil & Gas Operator | Sep 2025 |
| 1726 | CLV Oil & Gas Inc | Tulsa, OK 74169-0713 | Oil & Gas Operator | Apr 2020 |
| 1727 | Clyde B. Baker Opr. | | Gas Operator | Dec 1995 |
| 1728 | Clyde G. Kissinger | | Oil Operator | Jun 1964 |
| 1729 | Clyde H & Rae M Peters | Waterford, PA 16441-8872 | Gas Operator | Dec 2007 |
| 1730 | Clyde Petroleum | | Oil & Gas Operator | Dec 1988 |
| 1731 | Clyde W. Jones | | Oil Operator | Sep 2003 |
| 1732 | Clydesdale Energy LLC | Oklahoma City, OK 73116-9111 | Oil & Gas Operator | Nov 2019 |
| 1733 | Clymar, Inc | New Lexington, OH 43764 | Oil & Gas Operator | Dec 1996 |
| 1734 | CM Exploration Company Inc. | | Oil & Gas Operator | Apr 2009 |
| 1735 | CM Oil Co. | FT Stockton, TX 79735 | Oil & Gas Operator | Feb 2026 |
| 1736 | CM Oil Co., L.L.C. | | Oil Operator | Jan 2025 |
| 1737 | CM Production, LLC | | Oil & Gas Operator | Aug 2020 |
| 1738 | CM TX Production, LLC | Lakewood, CO 80228 | Oil & Gas Operator | Feb 2023 |
| 1739 | CM5 Resources, LLC | Artesia, NM 88211 | Oil & Gas Operator | Dec 2025 |
| 1740 | CMC Oil & Gas Inc | Bartlesville, OK 74006 | Oil & Gas Operator | Jun 1994 |
| 1741 | Cmint Productions LLC | Dallas, TX 75248-2643 | Oil Operator | Oct 2021 |
| 1742 | CML Exploration, LLC | Austin, TX 78746 | Oil & Gas Operator | Feb 2026 |
| 1743 | Cmo Inc. | | Oil Operator | Dec 2025 |
| 1744 | Cmo LLC | Mannford, OK 74044 | Oil & Gas Operator | Nov 2025 |
| 1745 | CMR Energy, L.P. | Houston, TX 77077 | Oil & Gas Operator | Feb 2026 |
| 1746 | CMR Oil, LLC | McKinney, TX 75072 | Oil Operator | Feb 2026 |
| 1747 | CMR Operating LLC | Tulsa, OK 74135-2653 | Oil & Gas Operator | Jun 2018 |
| 1748 | CMS Energy Inc | Dallas, TX 75287 | Oil & Gas Operator | Nov 2025 |
| 1749 | CMS Nomeco Oil & Gas Co. | Jackson, MI 49201 | Oil & Gas Operator | Jan 2015 |
| 1750 | CMS Oil And Gas Company | Jackson, MI 49201 | Oil & Gas Operator | Oct 2002 |
| 1751 | CMT Oil & Gas Company Inc | Tulsa, OK 74133-6724 | Oil & Gas Operator | Nov 2025 |
| 1752 | CMT Operating LLC | Cleveland, OK 74020-0113 | Oil & Gas Operator | Mar 2015 |
| 1753 | CMW Oil Company | | Oil & Gas Operator | Dec 1976 |
| 1754 | CMX Inc Of Kansas | Wichita, KS 67206-2561 | Oil & Gas Operator | Dec 2025 |
| 1755 | CMX, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 1756 | CNC Oil Co., Inc. | | Oil Operator | Aug 1991 |
| 1757 | CNG Development Co | | Oil & Gas Operator | Dec 2008 |
| 1758 | CNG Producing | New Orleans, LA 70112-6000 | Oil & Gas Operator | Jun 2000 |
| 1759 | CNG Producing Co.-Tulsa Div. | | Oil & Gas Operator | Jun 1986 |
| 1760 | CNG Producing Company | New Orleans, LA 70112 | Oil & Gas Operator | Dec 2015 |
| 1761 | CNR Resources Inc | Houston, TX 77002-4103 | Oil & Gas Operator | May 2005 |
| 1762 | CNS Energy, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2010 |
| 1763 | CNX Gas Company LLC | Canonsburg, PA 15317 | Oil & Gas Operator | Dec 2025 |
| 1764 | Co Energy | Benbrook, TX 76126 | Oil & Gas Operator | Feb 2026 |
| 1765 | Co-Co Incorporat | | Oil Operator | Oct 1989 |
| 1766 | Co-Co Oil, Inc. | Lubbock, TX 79407 | Oil & Gas Operator | Aug 2003 |
| 1767 | Co-Sha Investments | Fritch, TX 79036 | Oil & Gas Operator | Feb 2026 |
| 1768 | Co-St Oil Operating Co Inc | Enid, OK 73706 | Oil & Gas Operator | Apr 1997 |
| 1769 | Co-Wil-Co, Incorporated | | Oil Operator | Dec 1990 |
| 1770 | Coachman Energy Operating Co, LLC | Englewood, CO 80111 | Oil Operator | May 2024 |
| 1771 | Coal Creek Energy, LLC | Overland Park, KS 66221 | Oil Operator | Dec 2019 |
| 1772 | Coal Creek Minerals LLC | Northglenn, CO 80234 | Gas Operator | Feb 2012 |
| 1773 | Coal Gas Recovery II LLC | Waynesburg, PA 15370 | Gas Operator | Dec 2017 |
| 1774 | Coal Gas Recovery LLC | Waynesburg, PA 15370-2330 | Gas Operator | Dec 2012 |
| 1775 | Coal Gas Recovery LP | Linthicum Heights, MD 21090-2227 | Gas Operator | Dec 2010 |
| 1776 | Coal Gas Transportation LLC | Cadiz, OH 43907 | Gas Operator | Dec 2016 |
| 1777 | Coal Oil & Gas Company | Ada, OK 74820 | Oil & Gas Operator | Dec 2025 |
| 1778 | Coal Oil Inc. | | Oil & Gas Operator | Dec 1997 |
| 1779 | Coaleum Corporation | Dallas, TX 75205 | Oil & Gas Operator | Jan 2001 |
| 1780 | Coalinga Corporation | Houston, TX 77002 | Oil & Gas Operator | May 1999 |
| 1781 | Coaltech, Inc. | | Gas Operator | Jun 1993 |
| 1782 | Coark Dev, Inc | Pikeville, KY 41502 | Oil & Gas Operator | Dec 2023 |
| 1783 | Coast David | Bartlesville, OK 74006-0407 | Oil & Gas Operator | Nov 2025 |
| 1784 | Coast Exploration Co. | | Oil & Gas Operator | Nov 1997 |
| 1785 | Coast Supply Company LTD. | | Oil & Gas Operator | Dec 1991 |
| 1786 | Coastal Bend Petroleum Corp. | Corpus Chrsti, TX 78427 | Oil & Gas Operator | Dec 2002 |
| 1787 | Coastal Chem Inc | Midvale, UT 84047 | Oil & Gas Operator | Aug 2003 |
| 1788 | Coastal Expanse Oil & Gas | Austin, TX 78704 | Oil & Gas Operator | Feb 2026 |
| 1789 | Coastal Investments Inc. | El Campo, TX 77437 | Oil & Gas Operator | Feb 2026 |
| 1790 | Coastal Management Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 1791 | Coastal Minerals, Inc. | | Oil Operator | Aug 1991 |
| 1792 | Coastal New Mexico MGMT LLC | Carlsbad, NM 88220 | Oil & Gas Operator | Feb 2026 |
| 1793 | Coastal Oil & Ga | | Oil & Gas Operator | Oct 1996 |
| 1794 | Coastal Oil & Gas | | Oil & Gas Operator | Jul 1995 |
| 1795 | Coastal Oil & Gas Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 1796 | Coastal Oils Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2013 |
| 1797 | Coastal Petro Corp | Oil City, PA 16301-6327 | Oil & Gas Operator | Jul 2018 |
| 1798 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2026 |
| 1799 | Coastal Plains Exploration, LLC | Port Lavaca, TX 77979 | Oil & Gas Operator | Feb 2026 |
| 1800 | Coastal Production Company, Inc. | El Campo, TX 77437 | Oil & Gas Operator | Aug 1995 |