| 6501 | County Line Stone Co., Inc. | Akron, NY 14001 | Gas Operator | Dec 2024 |
| 6502 | County Line Stripper Wells LLC | Chelsea, OK 74016 | Oil & Gas Operator | Apr 2026 |
| 6503 | County Management, Inc. | Houston, TX 77055 | Oil & Gas Operator | Apr 1993 |
| 6504 | Countyline Production Co LLC | Duncan, OK 73533 | Oil Operator | Apr 2026 |
| 6505 | Couroil, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2000 |
| 6506 | Courson Oil & Gas, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jun 2026 |
| 6507 | Courson, Harold D. | Perryton, TX 79070 | Oil & Gas Operator | Aug 1998 |
| 6508 | Courtland City Lights Assoc. | | Oil Operator | Dec 2005 |
| 6509 | Courtney Oil Co. | | Oil Operator | Dec 1998 |
| 6510 | Coushatta Oil & Gas Inc. | | Oil & Gas Operator | Jan 2007 |
| 6511 | Cousins Exploration Co | Wichita Falls, TX 76307 | Oil Operator | Jun 1991 |
| 6512 | Covalence Operating Company LLC | | Oil & Gas Operator | Mar 2026 |
| 6513 | Cove Petroleum Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2020 |
| 6514 | Covenant Oil & Gas, L.P. | Houston, TX 77057 | Oil & Gas Operator | Dec 2006 |
| 6515 | Covenant Oil Company | Houma, LA 70360 | Oil & Gas Operator | Dec 2015 |
| 6516 | Covenant Oil Corp | Broken Arrow, OK 74014 | Oil & Gas Operator | May 2013 |
| 6517 | Covenant Operating, LLC | Wichita Falls, TX 76308 | Oil Operator | Jun 2026 |
| 6518 | Covenant Production Co., L.C. | Midland, TX 79702 | Oil & Gas Operator | Nov 2002 |
| 6519 | Covert, Christopher P. | Auburn, NY 13021 | Gas Operator | Dec 2024 |
| 6520 | Covey Energy, Inc. | | Oil & Gas Operator | Jun 1998 |
| 6521 | Covey Park Gas LLC | | Oil & Gas Operator | Aug 2019 |
| 6522 | Covey Park Operating LLC | Dallas, TX 75225 | Oil & Gas Operator | Aug 2019 |
| 6523 | Covey Park Resources LLC | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 6524 | Covington Oil Company Inc | Nichols Hills, OK 73116 | Oil & Gas Operator | Apr 2026 |
| 6525 | Cow Creek Resources Inc | Ponca City, OK 74601-7815 | Oil & Gas Operator | Mar 2026 |
| 6526 | Cow Run LTD Liability Company | Davidson, NC 28036 | Oil & Gas Operator | Nov 2018 |
| 6527 | Cowan Oil Company | | Oil Operator | Sep 1990 |
| 6528 | Cowboy Clean Fuels LLC | Laramie, WY 82072 | Gas Operator | Apr 2026 |
| 6529 | Cowboy Oil & Gas | Bristow, OK 74010-0057 | Oil & Gas Operator | Jul 2018 |
| 6530 | Cowboy Operating LLC | Oklahoma City, OK 73120 | Oil Operator | Mar 2026 |
| 6531 | Cowboys Resources Corp. | New Braunfels, TX 78132 | Oil Operator | Jan 2008 |
| 6532 | Cowden SR Lester L | Oklahoma City, OK 73118-4011 | Oil & Gas Operator | Sep 1999 |
| 6533 | Cowen Michael T | | Oil & Gas Operator | Dec 2009 |
| 6534 | Cowles James C | Muskogee, OK 74401-5262 | Oil Operator | Mar 2026 |
| 6535 | Cowley Energy Associates, LLC | Plano, TX 75093 | Gas Operator | Dec 2009 |
| 6536 | Cowrie Energy LLC | Austin, TX 78703 | Oil & Gas Operator | Jun 2026 |
| 6537 | Cowry Enterprises, LTD. | Littleton, CO 80161-3310 | Oil & Gas Operator | Mar 2022 |
| 6538 | Cox & Perkins Exploration, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 2026 |
| 6539 | Cox Edwin L & Be | | Oil & Gas Operator | Nov 1989 |
| 6540 | Cox Edwin L & Berry R | | Oil & Gas Operator | Oct 1987 |
| 6541 | Cox Edwin L & R Berry | Dallas, TX 75202 | Oil & Gas Operator | Apr 2015 |
| 6542 | Cox Elmer N | Irving, TX 75181 | Oil Operator | Aug 2013 |
| 6543 | Cox Engineering, LLC | Abilene, TX 79605 | Oil Operator | Mar 2006 |
| 6544 | Cox Exploration, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1999 |
| 6545 | Cox Gas Corporation | Dallas, TX 75201-7306 | Oil & Gas Operator | Apr 2015 |
| 6546 | Cox Kendall Jay | Recluse, WY 28775 | Oil & Gas Operator | Aug 2016 |
| 6547 | Cox Linda | Bristow, OK 74010-0808 | Oil & Gas Operator | Jan 2018 |
| 6548 | Cox Oil & Gas Inc | Dallas, TX 75201 | Oil & Gas Operator | Mar 2014 |
| 6549 | Cox Operating Co. | Wichita Falls, TX 76310 | Oil & Gas Operator | Jun 2000 |
| 6550 | Cox Operating, L.L.C. | | Oil & Gas Operator | Jan 2024 |
| 6551 | Cox P D Inc | Bristow, OK 74010 | Oil & Gas Operator | May 1993 |
| 6552 | Cox Resources Corporation | Dallas, TX 75244 | Oil & Gas Operator | Mar 2015 |
| 6553 | Cox Robert L | Blackwell, OK 74631 | Oil & Gas Operator | Mar 2026 |
| 6554 | Cox, Gary L | | Oil Operator | Mar 2022 |
| 6555 | Cox, H. L. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jan 2011 |
| 6556 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 6557 | Cox, Lee Investments Inc. | Mineral Wells, TX 76067 | Oil & Gas Operator | Jun 2026 |
| 6558 | Cox, Martin Regan | Irving, TX 75014 | Oil & Gas Operator | Jun 2026 |
| 6559 | Cox, Robert G. & Associates,Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 1994 |
| 6560 | Cox, Wayne D. | Eureka, KS 67045 | Oil Operator | Sep 1991 |
| 6561 | Coy W. Hale | | Oil Operator | Nov 2024 |
| 6562 | Coyote Oil Company | Lufkin, TX 75915 | Oil & Gas Operator | Sep 1996 |
| 6563 | Coyote Oil Company. LTD. | | Oil & Gas Operator | Dec 1997 |
| 6564 | Coyote Oil LLC | | Oil Operator | Jan 2018 |
| 6565 | Coyote Oil, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Jun 2026 |
| 6566 | Coyote Operating, LLC | Graham, TX 76450 | Oil Operator | Jun 2026 |
| 6567 | Coyote Services, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Mar 2002 |
| 6568 | Cozart Producers | | Oil Operator | Dec 2025 |
| 6569 | CP Energy, LLC | Edmond, OK 73034 | Oil Operator | Jul 2025 |
| 6570 | CP Exploration III Operating,LLC | Lafayette, LA 70505 | Oil & Gas Operator | Sep 2023 |
| 6571 | CP Exploration TX Operating LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Apr 2017 |
| 6572 | CPBG, LLC | | Oil Operator | Oct 2019 |
| 6573 | Cpi 5, L.L.C | | Oil Operator | Dec 2023 |
| 6574 | Cpi Operating Co. | | Oil & Gas Operator | Mar 2003 |
| 6575 | Cpi Operating Company, LLC | | Oil Operator | Jan 2025 |
| 6576 | Cpmak Investments, Inc. | Cross Plains, TX 76443 | Oil Operator | Jun 2026 |
| 6577 | CPRC Inc | Tulsa, OK 74103-5037 | Oil & Gas Operator | Apr 1997 |
| 6578 | CPRP Services LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Mar 2026 |
| 6579 | CPX Energy Operating, LLC | Fort Worth, TX 76147 | Oil & Gas Operator | Jun 2026 |
| 6580 | CR Energy | | Oil & Gas Operator | Dec 1992 |
| 6581 | CR Reed Production, Inc. | Gainesville, TX 76241 | Oil Operator | Jun 2026 |
| 6582 | CR2 Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 6583 | CR3 Operating Company, L.L.C. | Houston, TX 77251 | Oil & Gas Operator | Jun 2026 |
| 6584 | Cra International, LTD | | Oil & Gas Operator | Mar 1983 |
| 6585 | Cra-Gro Crop Service, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 6586 | Crab Run Gas Company | | Oil & Gas Operator | Feb 1982 |
| 6587 | Crabtree And Brown, Inc. | Kermit, TX 79745 | Oil & Gas Operator | Feb 1995 |
| 6588 | Crabtree Barbara T | Forney, TX 75126-5818 | Oil & Gas Operator | Oct 2024 |
| 6589 | Craft & Craft Productions LLC | | Oil Operator | May 2025 |
| 6590 | Craft Operating NM LLC | Houston, TX 77057 | Oil Operator | Apr 2024 |
| 6591 | Craft Petroleum Company, Inc. Et Al | | Oil & Gas Operator | Mar 1997 |
| 6592 | Craft Resources, Inc. | Weston, TX 75097 | Oil & Gas Operator | Aug 2003 |
| 6593 | Craig Elder Oil And Gas LLC | Edmond, OK 73013 | Oil & Gas Operator | Apr 2026 |
| 6594 | Craig Oil Compan | | Oil Operator | Jul 1996 |
| 6595 | Craig Oil Company | | Oil Operator | Dec 2019 |
| 6596 | Craig Oil, Inc. | Olney, TX 76374 | Oil Operator | Jun 2026 |
| 6597 | Craig, Bob | Olney, TX 76374 | Oil & Gas Operator | Jun 2026 |
| 6598 | Craig, Carl | Olney, TX 76374 | Oil & Gas Operator | Jun 2026 |
| 6599 | Craig, J. E. G. Estate | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2026 |
| 6600 | Craig, Robert A. | Olney, TX 76374 | Oil Operator | Jun 2026 |