| 5501 | Chief Oil & Gas LLC | Dallas, TX 75225 | Oil & Gas Operator | Feb 2022 |
| 5502 | Chief Operating Company | Houston, TX 77070 | Oil & Gas Operator | Feb 2004 |
| 5503 | Chief Operating LLC | Dallas, TX 75225 | Gas Operator | Mar 2009 |
| 5504 | Chief Petroleum Company | Dallas, TX 75244 | Oil & Gas Operator | Jul 1997 |
| 5505 | Chief Well Service Inc | Drumright, OK 74030 | Oil & Gas Operator | Mar 1995 |
| 5506 | Chieftain Oil Co Inc | Kiowa, KS 67070 | Oil & Gas Operator | Feb 2026 |
| 5507 | Childers, J. C. | Borger, TX 79008 | Oil & Gas Operator | Aug 2003 |
| 5508 | Chiles Jack Well Service | Atwood, OK 74827-0373 | Oil Operator | Apr 2014 |
| 5509 | Chiles Oil Field Supply | | Oil & Gas Operator | Jan 2025 |
| 5510 | Chiles Robert Morris | Allen, OK 74825 | Oil Operator | Dec 2025 |
| 5511 | Chiltipin Production Company | Corpus Chrsti, TX 78466 | Oil & Gas Operator | May 2026 |
| 5512 | Chilton Energy | Corpus Christ, TX 78401 | Oil & Gas Operator | Sep 2006 |
| 5513 | China Star Oil Co., LLC | Woodway, TX 76712 | Oil & Gas Operator | Jun 2010 |
| 5514 | Chinn Exploration Company | Longview, TX 75605 | Oil & Gas Operator | Nov 2015 |
| 5515 | Chinn, Larry A | | Oil & Gas Operator | Feb 2026 |
| 5516 | Chinn, Larry E | | Oil & Gas Operator | Feb 2026 |
| 5517 | Chinn, Velma D | | Oil Operator | Mar 2015 |
| 5518 | Chinook Energy C | | Oil Operator | Jul 1991 |
| 5519 | Chiodo Corp. | San Antonio, TX 78232 | Oil & Gas Operator | May 2026 |
| 5520 | Chipcore LLC | Casper, WY 82601 | Oil & Gas Operator | Jan 2026 |
| 5521 | Chipmunk'S Oil & Gas Lease Oper., Inc. | Copan, OK 74022 | Oil Operator | Dec 1996 |
| 5522 | Chipper Energy LLC | Magnolia, OH 44643 | Oil & Gas Operator | Dec 2025 |
| 5523 | Chippewa Cree Tribe | | Gas Operator | Feb 2026 |
| 5524 | Chippewa Oil & Gas Inc | Douglas, WY 82633 | Oil & Gas Operator | Jan 1985 |
| 5525 | Chisholm Energy Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2022 |
| 5526 | Chisholm Exploration | Abilene, TX 79604 | Oil & Gas Operator | May 2026 |
| 5527 | Chisholm Oil & Gas, LC | Buda, TX 78610 | Oil & Gas Operator | May 2026 |
| 5528 | Chisholm Oil And Gas Operating LLC | Tulsa, OK 74103-3522 | Oil & Gas Operator | Feb 2026 |
| 5529 | Chisholm Oil Investments | Seabrook, TX 77586 | Oil & Gas Operator | May 2026 |
| 5530 | Chisholm Operating LLC | Oklahoma City, OK 73101-1502 | Oil & Gas Operator | Dec 2017 |
| 5531 | Chisholm Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | May 2026 |
| 5532 | Chisler Brothers Contracting Limited Liability Company | Pentress, WV 26544-0000 | Oil & Gas Operator | Dec 2021 |
| 5533 | Chisler, F. M. | Clemmons, NC 27012 | Oil & Gas Operator | Jul 2021 |
| 5534 | Chisos Exploration Inc | Enid, OK 73703 | Oil & Gas Operator | Dec 2004 |
| 5535 | Chisos Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2026 |
| 5536 | Chisos, LTD | Houston, TX 77098 | Oil & Gas Operator | May 2026 |
| 5537 | Chisum G H | Duncan, OK 73533 | Oil & Gas Operator | Dec 2010 |
| 5538 | Chisum Oil & Gas, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Dec 2025 |
| 5539 | Chisum Resources | Shallowater, TX 79363 | Oil Operator | May 2026 |
| 5540 | Chital Petroleum Corp. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2000 |
| 5541 | Chittim Operating LLC | Houston, TX 77079 | Oil & Gas Operator | May 2026 |
| 5542 | Chizum Oil LLC | Wichita, KS 67211 | Oil & Gas Operator | Feb 2026 |
| 5543 | Chmelar, Eugene Oil & Gas | Caldwell, TX 77836 | Oil & Gas Operator | May 2026 |
| 5544 | Choate Kenny Dba Rebound Oil Co | Helena, OK 73741-0543 | Gas Operator | Feb 2026 |
| 5545 | Chockley Energy LLC | Beaver, OK 73932 | Gas Operator | Jan 2026 |
| 5546 | Choctaw Gas Company | Quinton, OK 74561 | Gas Operator | Jan 2026 |
| 5547 | Choctaw Holdings, Inc. | | Oil Operator | Dec 1974 |
| 5548 | Choctaw II Oil & Gas, LTD. | Houston, TX 77002 | Oil & Gas Operator | Jan 2002 |
| 5549 | Choctaw Resources, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Dec 2019 |
| 5550 | Choice Exploration, Inc. | Irving, TX 75063 | Oil & Gas Operator | May 2026 |
| 5551 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | May 2026 |
| 5552 | Cholla Production LLC | Littleton, CO 80127 | Oil & Gas Operator | Dec 2025 |
| 5553 | Cholla Resources | | Oil Operator | Oct 1995 |
| 5554 | Cholla Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jan 1997 |
| 5555 | Chooch Incorpora | | Gas Operator | Dec 1994 |
| 5556 | CHP Oil & Gas Company, L.C. | El Campo, TX 77437 | Oil & Gas Operator | May 2026 |
| 5557 | Chriestenson Oil LLC | Neosho Falls, KS 66758 | Oil Operator | Dec 2025 |
| 5558 | Chris Batchman Inc. | Ellinwood, KS 67526 | Oil Operator | Dec 2025 |
| 5559 | Chris Glade Oil & Gas, LLC | | Gas Operator | Dec 2011 |
| 5560 | Chris Melander Drilling | | Oil Operator | Jun 2015 |
| 5561 | Chris Oil Co | Cambridge, OH 43725 | Oil & Gas Operator | Nov 2008 |
| 5562 | Chriscor Oil & Gas | Plana, TX 75075 | Oil & Gas Operator | Jul 1987 |
| 5563 | Chrisman Drilling Co. | Pennsboro, WV 26415 | Oil & Gas Operator | Dec 2021 |
| 5564 | Christa Oil Co | Cumberland, OH 43732 | Oil & Gas Operator | Nov 1999 |
| 5565 | Christa Oil Comp | | Oil Operator | Nov 1994 |
| 5566 | Christensen & Matthews | Houston, TX 77040 | Oil & Gas Operator | May 2026 |
| 5567 | Christensen C G | | Oil Operator | Sep 1990 |
| 5568 | Christensen Ranch | Newcastle, WY 82701 | Oil Operator | Feb 2026 |
| 5569 | Christeve Oil Company, Inc. | Houston, TX 77068 | Oil & Gas Operator | Dec 2022 |
| 5570 | Christian Airmen, Incorporated | Akron, NY 14001 | Gas Operator | Dec 2024 |
| 5571 | Christian Energy, Inc. | Mandeville, LA 70470 | Oil & Gas Operator | Mar 2008 |
| 5572 | Christian Oil Co | | Oil & Gas Operator | Feb 2026 |
| 5573 | Christian Operating Company | Cypress, TX 77429 | Oil & Gas Operator | Dec 2014 |
| 5574 | Christian Well Service | | Oil & Gas Operator | May 1987 |
| 5575 | Christico Petroleum Company | San Antonio, TX 78216 | Oil & Gas Operator | May 2026 |
| 5576 | Christie Jr C B | Wichita Falls, TX 76308-4873 | Oil & Gas Operator | May 2024 |
| 5577 | Christie Oil Co., Inc | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 1996 |
| 5578 | Christie, C. B., Jr. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2014 |
| 5579 | Christine Marie Exploration LP | Indiana, PA 15701-0515 | Oil & Gas Operator | Dec 2025 |
| 5580 | Christman Rosalie | Woodsfield, OH 43793 | Oil & Gas Operator | Dec 2025 |
| 5581 | Christmann Energy Corp. | | Oil & Gas Operator | Feb 1991 |
| 5582 | Christmann John J | Lubbock, TX 79401 | Oil & Gas Operator | Dec 1994 |
| 5583 | Christopher Oil & Gas Inc | Fulshear, TX 77441 | Oil & Gas Operator | Apr 2015 |
| 5584 | Chroma Operating, Inc. | Washington, DC 20036 | Oil & Gas Operator | Jun 2016 |
| 5585 | CHS McPherson Refinery Inc | Platteville, CO 80651 | Oil & Gas Operator | Apr 1994 |
| 5586 | Chuck Henry Energy LLC | Wellsville, NY 14895 | Oil Operator | Dec 2024 |
| 5587 | Chumley, George Estate Of | Alice, TX 78333 | Oil & Gas Operator | May 2026 |
| 5588 | Church Ranch, LLC | Lubbock, TX 79423 | Oil Operator | May 2026 |
| 5589 | Church, Steve | Philpot, KY 42366 | Oil & Gas Operator | Dec 2022 |
| 5590 | Churchill Energy, Inc. | | Oil & Gas Operator | Aug 2020 |
| 5591 | Chute Ray C | Logan, OH 43138 | Oil & Gas Operator | Dec 2014 |
| 5592 | Chuza Oil Company | Farmington, NM 87402 | Oil Operator | Dec 2017 |
| 5593 | Chuza Operating | Midland, TX 79710 | Oil & Gas Operator | Sep 2006 |
| 5594 | Cibco Resources, LLC | | Oil & Gas Operator | Nov 2024 |
| 5595 | Cibola Energy Corp | Albuquerque, NM 87103 | Oil & Gas Operator | Oct 2017 |
| 5596 | Cibolo Energy Operating, Inc. | Bulverde, TX 78163 | Oil & Gas Operator | May 2026 |
| 5597 | Cibolo Production, LLC | Boerne, TX 78006 | Oil Operator | Jan 2020 |
| 5598 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 5599 | Ciera Resources, Inc. | | Gas Operator | Nov 1998 |
| 5600 | Ciervo Resources Asset Holding, LLC | Houston, TX 77056 | Oil & Gas Operator | May 2026 |