| 6501 | Cottonwood Opr Corp | | Gas Operator | Dec 1989 |
| 6502 | Cottonwood Petroleum Co. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2009 |
| 6503 | Cottonwood Prod Co Inc | Buffalo, NY 14202-2212 | Gas Operator | Dec 2002 |
| 6504 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 6505 | Cottrell Gas, LLC | Meade, KS 67864 | Gas Operator | May 2026 |
| 6506 | Cotula Oil & Gas Co., Inc. | Cross Plains, TX 76443 | Oil Operator | Sep 2026 |
| 6507 | Couch Donald W | Marlow, OK 73055 | Oil & Gas Operator | Jul 2026 |
| 6508 | Couch Fred J | Broken Arrow, OK 74012 | Oil Operator | Mar 2010 |
| 6509 | Couch Oil & Gas, Inc. | Dallas, TX 75229 | Oil & Gas Operator | Sep 2026 |
| 6510 | Couch, Gilbert | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2026 |
| 6511 | Couch, Harry L. | Odessa, TX 79762 | Oil & Gas Operator | Nov 1994 |
| 6512 | Cougar Energies, Inc. | Oberlin, KS 67749 | Oil Operator | Jun 1996 |
| 6513 | Cougar Energy Inc | Oil City, PA 16301-4046 | Oil & Gas Operator | Dec 2013 |
| 6514 | Cougar Energy Investment LLC | Spring, TX 77387-7277 | Oil & Gas Operator | Sep 2014 |
| 6515 | Cougar Exploration, Inc. | | Oil & Gas Operator | Jun 1988 |
| 6516 | Cougar Oil | | Oil Operator | May 2026 |
| 6517 | Cougar Oil & Gas Co., Inc. | Houston, TX 77269 | Oil & Gas Operator | Mar 2008 |
| 6518 | Cougar Oil, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Jun 2009 |
| 6519 | Coughlin, Daniel L | | Oil Operator | Aug 2000 |
| 6520 | Coulthurst MGT & Inv Inc | Reno, NV 89504 | Oil Operator | Sep 2020 |
| 6521 | Council Oak Resources LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Jul 2026 |
| 6522 | Country Boy Oil Co Inc | | Oil Operator | Nov 2017 |
| 6523 | Country Side Sand & Gravel, Inc | Collins, NY 14034 | Gas Operator | Dec 2025 |
| 6524 | Countrymark Energy Resources L L C | MT Vernon, IN 47620 | Oil & Gas Operator | Dec 2024 |
| 6525 | County Line Resources LLC | Lancaster, TX 75146 | Oil Operator | Sep 2026 |
| 6526 | County Line Stone Co., Inc. | Akron, NY 14001 | Gas Operator | Dec 2025 |
| 6527 | County Line Stripper Wells LLC | Chelsea, OK 74016 | Oil & Gas Operator | Jun 2026 |
| 6528 | County Management, Inc. | Houston, TX 77055 | Oil & Gas Operator | Apr 1993 |
| 6529 | Countyline Production Co LLC | Duncan, OK 73533 | Oil Operator | Jul 2026 |
| 6530 | Couroil, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2000 |
| 6531 | Courson Oil & Gas, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2026 |
| 6532 | Courson, Harold D. | Perryton, TX 79070 | Oil & Gas Operator | Aug 1998 |
| 6533 | Courtland City Lights Assoc. | | Oil Operator | Dec 2005 |
| 6534 | Courtney Oil Co. | | Oil Operator | Dec 1998 |
| 6535 | Coushatta Oil & Gas Inc. | | Oil & Gas Operator | Jan 2007 |
| 6536 | Cousins Exploration Co | Wichita Falls, TX 76307 | Oil Operator | Jun 1991 |
| 6537 | Covalence Operating Company LLC | | Oil & Gas Operator | May 2026 |
| 6538 | Cove Petroleum Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2020 |
| 6539 | Covenant Oil & Gas, L.P. | Houston, TX 77057 | Oil & Gas Operator | Dec 2006 |
| 6540 | Covenant Oil Company | Houma, LA 70360 | Oil & Gas Operator | Dec 2015 |
| 6541 | Covenant Oil Corp | Broken Arrow, OK 74014 | Oil & Gas Operator | May 2013 |
| 6542 | Covenant Operating, LLC | Wichita Falls, TX 76308 | Oil Operator | Sep 2026 |
| 6543 | Covenant Production Co., L.C. | Midland, TX 79702 | Oil & Gas Operator | Nov 2002 |
| 6544 | Covert, Christopher P. | Auburn, NY 13021 | Gas Operator | Dec 2025 |
| 6545 | Covey Energy, Inc. | | Oil & Gas Operator | Jun 1998 |
| 6546 | Covey Park Gas LLC | | Oil & Gas Operator | Aug 2019 |
| 6547 | Covey Park Operating LLC | Dallas, TX 75225 | Oil & Gas Operator | Aug 2019 |
| 6548 | Covey Park Resources LLC | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 6549 | Covington Oil Company Inc | Nichols Hills, OK 73116 | Oil & Gas Operator | Jul 2026 |
| 6550 | Cow Creek Resources Inc | Ponca City, OK 74601-7815 | Oil & Gas Operator | May 2026 |
| 6551 | Cow Run LTD Liability Company | | Oil & Gas Operator | Nov 2018 |
| 6552 | Cowan Oil Company | | Oil Operator | Sep 1990 |
| 6553 | Cowboy Clean Fuels LLC | Laramie, WY 82072 | Gas Operator | Jun 2026 |
| 6554 | Cowboy Oil & Gas | Bristow, OK 74010-0057 | Oil & Gas Operator | Jul 2018 |
| 6555 | Cowboy Operating LLC | Tecumseh, OK 74873 | Oil Operator | Mar 2026 |
| 6556 | Cowboys Resources Corp. | New Braunfels, TX 78132 | Oil Operator | Jan 2008 |
| 6557 | Cowden SR Lester L | Oklahoma City, OK 73118-4011 | Oil & Gas Operator | Sep 1999 |
| 6558 | Cowen Michael T | | Oil & Gas Operator | Dec 2009 |
| 6559 | Cowles James C | Muskogee, OK 74401-5262 | Oil Operator | Mar 2026 |
| 6560 | Cowley Energy Associates, LLC | Plano, TX 75093 | Gas Operator | Dec 2009 |
| 6561 | Cowrie Energy LLC | Austin, TX 78703 | Oil & Gas Operator | Sep 2026 |
| 6562 | Cowry Enterprises, LTD. | Littleton, CO 80161-3310 | Oil & Gas Operator | Mar 2022 |
| 6563 | Cox & Perkins Exploration, Inc. | Houston, TX 77057 | Oil & Gas Operator | Sep 2026 |
| 6564 | Cox Edwin L & Be | | Oil & Gas Operator | Nov 1989 |
| 6565 | Cox Edwin L & Berry R | | Oil & Gas Operator | Oct 1987 |
| 6566 | Cox Edwin L & R Berry | Dallas, TX 75202 | Oil & Gas Operator | Apr 2015 |
| 6567 | Cox Elmer N | Irving, TX 75181 | Oil Operator | Aug 2013 |
| 6568 | Cox Engineering, LLC | Abilene, TX 79605 | Oil Operator | Mar 2006 |
| 6569 | Cox Exploration, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1999 |
| 6570 | Cox Gas Corporation | Dallas, TX 75201-7306 | Oil & Gas Operator | Apr 2015 |
| 6571 | Cox Kendall Jay | Recluse, WY 28775 | Oil & Gas Operator | Aug 2016 |
| 6572 | Cox Linda | Bristow, OK 74010-0808 | Oil & Gas Operator | Jan 2018 |
| 6573 | Cox Oil & Gas Inc | Dallas, TX 75201 | Oil & Gas Operator | Mar 2014 |
| 6574 | Cox Operating Co. | Wichita Falls, TX 76310 | Oil & Gas Operator | Jun 2000 |
| 6575 | Cox Operating, L.L.C. | | Oil & Gas Operator | Jan 2024 |
| 6576 | Cox P D Inc | Bristow, OK 74010 | Oil & Gas Operator | May 1993 |
| 6577 | Cox Resources Corporation | Dallas, TX 75244 | Oil & Gas Operator | Mar 2015 |
| 6578 | Cox Robert L | Blackwell, OK 74631 | Oil & Gas Operator | Jun 2026 |
| 6579 | Cox, Gary L | | Oil Operator | Mar 2022 |
| 6580 | Cox, H. L. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jan 2011 |
| 6581 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 6582 | Cox, Lee Investments Inc. | Mineral Wells, TX 76067 | Oil & Gas Operator | Feb 2026 |
| 6583 | Cox, Martin Regan | Irving, TX 75014 | Oil & Gas Operator | Sep 2026 |
| 6584 | Cox, Robert G. & Associates,Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 1994 |
| 6585 | Cox, Wayne D. | Eureka, KS 67045 | Oil Operator | Sep 1991 |
| 6586 | Coy W. Hale | | Oil Operator | Nov 2024 |
| 6587 | Coyote Oil Company | Lufkin, TX 75915 | Oil & Gas Operator | Sep 1996 |
| 6588 | Coyote Oil Company. LTD. | | Oil & Gas Operator | Dec 1997 |
| 6589 | Coyote Oil LLC | | Oil Operator | Jan 2018 |
| 6590 | Coyote Oil, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Sep 2026 |
| 6591 | Coyote Operating, LLC | Graham, TX 76450 | Oil Operator | Sep 2026 |
| 6592 | Coyote Services, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Mar 2002 |
| 6593 | Cozart Producers | | Oil Operator | Dec 2025 |
| 6594 | CP Energy, LLC | Edmond, OK 73034 | Oil Operator | Jul 2025 |
| 6595 | CP Exploration III Operating,LLC | Lafayette, LA 70505 | Oil & Gas Operator | Sep 2023 |
| 6596 | CP Exploration TX Operating LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Apr 2017 |
| 6597 | CPBG, LLC | | Oil Operator | Oct 2019 |
| 6598 | Cpi 5, L.L.C | | Oil Operator | Dec 2023 |
| 6599 | Cpi Operating Co. | | Oil & Gas Operator | Mar 2003 |
| 6600 | Cpi Operating Company, LLC | | Oil Operator | Jan 2025 |