| 1701 | C & C Oil & Gas | Ranger, TX 76470 | Oil & Gas Operator | Oct 2025 |
| 1702 | C & C Oil Co. | Borger, TX 79008 | Oil & Gas Operator | Jun 2025 |
| 1703 | C & C Oil Producers | Borger, TX 79008 | Oil & Gas Operator | Oct 2025 |
| 1704 | C & C Operating, LLC | Iowa Park, TX 76367 | Oil Operator | Oct 2025 |
| 1705 | C & C Petroleum Management, LLC | Abilene, TX 79601 | Oil & Gas Operator | Oct 2025 |
| 1706 | C & D Energy Company, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 1994 |
| 1707 | C & E Oil Company | Corpus Christi, TX 78418 | Oil Operator | Jan 1989 |
| 1708 | C & E Operating, Inc. | Hockley, TX 77447 | Oil & Gas Operator | Oct 2025 |
| 1709 | C & F Energy, Co. | Oil City, LA 71061 | Oil & Gas Operator | Dec 1996 |
| 1710 | C & F Petroleum, Inc. | San Angelo, TX 76902 | Oil & Gas Operator | May 2013 |
| 1711 | C & G Operating, LLC | San Antonio, TX 78209 | Oil Operator | Oct 2025 |
| 1712 | C & G Petroleum, Inc. | Imperial, TX 79743 | Oil & Gas Operator | Aug 2004 |
| 1713 | C & G Transports, Inc. | Woodson, TX 76491 | Oil & Gas Operator | Oct 2025 |
| 1714 | C & H Energy LLC | Blue Mound, KS 66010 | Oil Operator | Nov 2009 |
| 1715 | C & L Oil Company | Cross Plains, TX 76443 | Oil & Gas Operator | Oct 2025 |
| 1716 | C & L Operating, Inc. | Valera, TX 76884 | Oil & Gas Operator | Oct 2025 |
| 1717 | C & M Exploration LLC | Tulsa, OK 74159-1331 | Oil & Gas Operator | Jun 2014 |
| 1718 | C & M Operating Company | Graham, TX 76450 | Oil & Gas Operator | Jun 2025 |
| 1719 | C & M Operating, Inc. (A) | Alleyton, TX 78935 | Gas Operator | Aug 2011 |
| 1720 | C & N Oil Co | Monahans, TX 79756 | Oil Operator | Oct 2025 |
| 1721 | C & O Production | Nocona, TX 76255 | Oil & Gas Operator | Feb 2020 |
| 1722 | C & P Land Services Limited Liability Company | Los Angeles, CA 90035 | Oil Operator | Oct 2025 |
| 1723 | C & R Oil Co. | Abilene, TX 79605 | Oil & Gas Operator | Oct 2025 |
| 1724 | C & S Oil Company | Odessa, TX 79763 | Oil & Gas Operator | Nov 2019 |
| 1725 | C & S Operating | Whiteface, TX 79379 | Oil & Gas Operator | Oct 2025 |
| 1726 | C And S Oil & Gas | San Antonio, TX 78217 | Oil & Gas Operator | Feb 1998 |
| 1727 | C Bar Petroleum Company | Lubbock, TX 79413 | Oil & Gas Operator | May 2018 |
| 1728 | C E Energy LLC | Katy, TX 77449 | Oil Operator | Oct 2025 |
| 1729 | C E L Inc | Bartlesville, OK 74006 | Oil & Gas Operator | Jan 2020 |
| 1730 | C O G Company | Bangs, TX 76823 | Oil & Gas Operator | Oct 2025 |
| 1731 | C Oil Co. | New Braunfels, TX 78132 | Oil & Gas Operator | Feb 2017 |
| 1732 | C R I Inc | Midland, TX 79702 | Oil & Gas Operator | Nov 1993 |
| 1733 | C Rose Oil Co. | Midland, TX 79708 | Oil & Gas Operator | Jun 2025 |
| 1734 | C S J, Inc. | Austin, TX 78716 | Oil & Gas Operator | Oct 2025 |
| 1735 | C S Petroleum Inc | Norman, OK 73070 | Oil & Gas Operator | Dec 2024 |
| 1736 | C&C II | Pleasanton, TX 78064 | Oil & Gas Operator | Mar 1998 |
| 1737 | C&P Resources Operating Co,LLC | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 1738 | C-D Oil Company, Inc. | Cameron, TX 76520 | Oil Operator | Oct 2025 |
| 1739 | C. M. Oil Corporation | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2016 |
| 1740 | C. O. Oil And Gas, LLC | Pampa, TX 79066 | Oil & Gas Operator | Oct 2025 |
| 1741 | C. W. Resources, Inc. | Longview, TX 75604 | Oil & Gas Operator | Oct 2025 |
| 1742 | C.C.O. & G. Company Inc. | Austin, TX 78765 | Oil & Gas Operator | Sep 1995 |
| 1743 | C.F.O., Inc. | Liberty, TX 77575 | Oil Operator | Oct 2025 |
| 1744 | C.J. Oil Company | Iowa Park, TX 76367 | Oil Operator | Jan 2025 |
| 1745 | C.O.W. Operating Company | Graham, TX 76450 | Oil Operator | Oct 2025 |
| 1746 | C.W. Pickering, Inc. | Victoria, TX 77904 | Gas Operator | Sep 2022 |
| 1747 | C5 Energy LLC | Collinsville, OK 74021 | Oil & Gas Operator | Dec 2019 |
| 1748 | C6 Operating, L.L.C. | Keatchie, LA 71046 | Oil & Gas Operator | Oct 2025 |
| 1749 | Cab Resources, LLC | Odessa, TX 79762 | Oil Operator | Oct 2025 |
| 1750 | Cabal Energy Corporation | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 1751 | Cabana Oil Corp. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2006 |
| 1752 | Cabeza Oil And Gas, LLC | Austin, CO 81410 | Oil & Gas Operator | Mar 2022 |
| 1753 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jun 2025 |
| 1754 | Cabot Oil & Gas Production Corp. | Houston, TX 77060 | Oil & Gas Operator | Jun 1996 |
| 1755 | Cactus Gas & Oil, Inc. | San Antonio, TX 78259 | Oil & Gas Operator | Oct 2025 |
| 1756 | Cactus Jack Operating Company | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Aug 2003 |
| 1757 | Cactus Oil Company | Pampa, TX 79066 | Oil & Gas Operator | Aug 2000 |
| 1758 | Cactus Petroleum Corporation | Houston, TX 77077 | Oil & Gas Operator | Oct 2025 |
| 1759 | Cada Operating, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Nov 2004 |
| 1760 | Caddell Well Service, Inc. | Prairie Lea, TX 78661 | Oil & Gas Operator | Oct 2025 |
| 1761 | Caddo Corporation | Austin, TX 78731 | Oil & Gas Operator | Oct 2025 |
| 1762 | Caddo Creek Corporation | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 1994 |
| 1763 | Caddo Management, Inc | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 1764 | Caddo Operating Inc. | Marshall, TX 75671 | Oil & Gas Operator | Oct 2025 |
| 1765 | Cadence Energy Partners, LLC | Blanchard, OK 73010 | Oil & Gas Operator | Jun 2010 |
| 1766 | Cag Petroleum Corp. | Dallas, TX 75382 | Oil & Gas Operator | Oct 2025 |
| 1767 | Cago, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Oct 2025 |
| 1768 | Cain, L. L. & White, Wayne R. | Lubbock, TX 79407 | Oil & Gas Operator | Apr 2005 |
| 1769 | Caird Operating, LLC | Fort Worth, TX 76185 | Oil & Gas Operator | Oct 2025 |
| 1770 | Cal Oil Company | Missouri City, TX 77459 | Oil Operator | May 2022 |
| 1771 | Cal-Mon Oil Company | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 1772 | Cal-T Oil Company, Incorporated | Borger, TX 79008 | Oil & Gas Operator | Feb 2008 |
| 1773 | Cal-Tex Exploration & Production Company LLC | San Antonio, TX 78228 | Oil & Gas Operator | Oct 2025 |
| 1774 | Cal-Tex Fossil, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 1775 | Cal-Tex Gas Transmission Co,Inc. | Mabank, TX 75147 | Oil & Gas Operator | Nov 1999 |
| 1776 | Cal-Tex Operating Co. | Manchaca, TX 78652 | Oil & Gas Operator | May 2020 |
| 1777 | Calame, Richard | Devine, TX 78016 | Oil Operator | Oct 2025 |
| 1778 | Caldera Operating Company LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 2021 |
| 1779 | Caldwell Production Co. Inc. | Borger, TX 79008 | Oil & Gas Operator | Aug 2010 |
| 1780 | Caldwell, J. A. | San Antonio, TX 78223 | Oil & Gas Operator | Jun 2000 |
| 1781 | Calfas Cattle & Oil, LLC | San Antonio, TX 78205 | Oil Operator | Oct 2025 |
| 1782 | Calfas Oil, LLC | San Antonio, TX 78205 | Oil Operator | Oct 2025 |
| 1783 | Calhoun & Ellison Oil Co. | San Antonio, TX 78248 | Oil & Gas Operator | Dec 1997 |
| 1784 | Cali Crude LLC | Austin, TX 78738 | Oil Operator | Oct 2025 |
| 1785 | Calico Operating Co., Inc. | Dallas, TX 75205 | Oil & Gas Operator | Dec 2002 |
| 1786 | Caliente Oil LLC | Cedar Park, TX 78613 | Oil & Gas Operator | Oct 2025 |
| 1787 | Calima Energy LLC | Electra, TX 76360 | Oil Operator | Oct 2025 |
| 1788 | Calistoga Energy Reserves, LLC | Houston, TX 77063 | Oil & Gas Operator | Oct 2025 |
| 1789 | Calk Oil Company | Lytle, TX 78052 | Oil Operator | Oct 2025 |
| 1790 | Calk Operating, LLC | Lytle, TX 78052 | Oil Operator | Oct 2025 |
| 1791 | Calk, Roger D. | Lytle, TX 78052 | Oil & Gas Operator | Oct 2025 |
| 1792 | Callahan Land Company | Richardson, TX 75081 | Oil & Gas Operator | Sep 2020 |
| 1793 | Callarman, David | Cisco, TX 76437 | Oil & Gas Operator | Oct 2025 |
| 1794 | Callaway Production Co., Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 1996 |
| 1795 | Calley, Bob | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 1796 | Callon (Eagle Ford) LLC | Houston, TX 77042 | Oil & Gas Operator | Jun 2023 |
| 1797 | Callon (Permian) LLC | Houston, TX 77042 | Oil & Gas Operator | Jul 2024 |
| 1798 | Callon Offshore Production, Inc. | Natchez, MS 39121 | Oil & Gas Operator | Dec 2005 |
| 1799 | Callon Permian II, LLC | Houston, TX 77056 | Oil & Gas Operator | Jul 2024 |
| 1800 | Callon Petroleum Operating Co | Houston, TX 77042 | Oil & Gas Operator | Jul 2024 |