| 5501 | Choice Exploration, Inc. | Irving, TX 75063 | Oil & Gas Operator | Jun 2026 |
| 5502 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Jun 2026 |
| 5503 | Cholla Production LLC | Littleton, CO 80127 | Oil & Gas Operator | Feb 2026 |
| 5504 | Cholla Resources | | Oil Operator | Oct 1995 |
| 5505 | Cholla Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jan 1997 |
| 5506 | Chooch Incorpora | | Gas Operator | Dec 1994 |
| 5507 | CHP Oil & Gas Company, L.C. | El Campo, TX 77437 | Oil & Gas Operator | Jun 2026 |
| 5508 | Chriestenson Oil LLC | Neosho Falls, KS 66758 | Oil Operator | Feb 2026 |
| 5509 | Chris Batchman Inc. | Ellinwood, KS 67526 | Oil Operator | Feb 2026 |
| 5510 | Chris Glade Oil & Gas, LLC | | Gas Operator | Dec 2011 |
| 5511 | Chris Melander Drilling | | Oil Operator | Jun 2015 |
| 5512 | Chris Oil Co | Cambridge, OH 43725 | Oil & Gas Operator | Nov 2008 |
| 5513 | Chriscor Oil & Gas | Plana, TX 75075 | Oil & Gas Operator | Jul 1987 |
| 5514 | Chrisman Drilling Co. | Pennsboro, WV 26415 | Oil & Gas Operator | Dec 2021 |
| 5515 | Christa Oil Co | Cumberland, OH 43732 | Oil & Gas Operator | Nov 1999 |
| 5516 | Christa Oil Comp | | Oil Operator | Nov 1994 |
| 5517 | Christensen & Matthews | Houston, TX 77040 | Oil & Gas Operator | Jun 2026 |
| 5518 | Christensen C G | | Oil Operator | Sep 1990 |
| 5519 | Christensen Ranch | Newcastle, WY 82701 | Oil Operator | Feb 2026 |
| 5520 | Christeve Oil Company, Inc. | Houston, TX 77068 | Oil & Gas Operator | Dec 2022 |
| 5521 | Christian Airmen, Incorporated | Akron, NY 14001 | Gas Operator | Dec 2024 |
| 5522 | Christian Energy, Inc. | Mandeville, LA 70470 | Oil & Gas Operator | Mar 2008 |
| 5523 | Christian Oil Co Inc | | Oil & Gas Operator | Apr 2026 |
| 5524 | Christian Operating Company | Cypress, TX 77429 | Oil & Gas Operator | Dec 2014 |
| 5525 | Christian Well Service | | Oil & Gas Operator | May 1987 |
| 5526 | Christico Petroleum Company | San Antonio, TX 78216 | Oil & Gas Operator | Jun 2026 |
| 5527 | Christie Jr C B | Wichita Falls, TX 76308-4873 | Oil & Gas Operator | May 2024 |
| 5528 | Christie Oil Co., Inc | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 1996 |
| 5529 | Christie, C. B., Jr. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2014 |
| 5530 | Christine Marie Exploration LP | Indiana, PA 15701-0515 | Oil & Gas Operator | Dec 2025 |
| 5531 | Christman Rosalie | Woodsfield, OH 43793 | Oil & Gas Operator | Dec 2025 |
| 5532 | Christmann Energy Corp. | | Oil & Gas Operator | Feb 1991 |
| 5533 | Christmann John J | Lubbock, TX 79401 | Oil & Gas Operator | Dec 1994 |
| 5534 | Christopher Oil & Gas Inc | Fulshear, TX 77441 | Oil & Gas Operator | Apr 2015 |
| 5535 | Chroma Operating, Inc. | Washington, DC 20036 | Oil & Gas Operator | Jun 2016 |
| 5536 | CHS McPherson Refinery Inc | Platteville, CO 80651 | Oil & Gas Operator | Apr 1994 |
| 5537 | Chuck Henry Energy LLC | Wellsville, NY 14895 | Oil Operator | Dec 2024 |
| 5538 | Chumley, George Estate Of | Alice, TX 78333 | Oil & Gas Operator | Jun 2026 |
| 5539 | Church Ranch, LLC | Lubbock, TX 79423 | Oil Operator | Jun 2026 |
| 5540 | Church, Steve | Philpot, KY 42366 | Oil & Gas Operator | Dec 2022 |
| 5541 | Churchill Energy, Inc. | | Oil & Gas Operator | Aug 2020 |
| 5542 | Chute Ray C | Logan, OH 43138 | Oil & Gas Operator | Dec 2014 |
| 5543 | Chuza Oil Company | Farmington, NM 87402 | Oil Operator | Dec 2017 |
| 5544 | Chuza Operating | Midland, TX 79710 | Oil & Gas Operator | Sep 2006 |
| 5545 | Cibco Resources, LLC | | Oil & Gas Operator | Nov 2024 |
| 5546 | Cibola Energy Corp | Albuquerque, NM 87103 | Oil & Gas Operator | Oct 2017 |
| 5547 | Cibolo Energy Operating, Inc. | Bulverde, TX 78163 | Oil & Gas Operator | Jun 2026 |
| 5548 | Cibolo Production, LLC | Boerne, TX 78006 | Oil Operator | Jan 2020 |
| 5549 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 5550 | Ciera Resources, Inc. | | Gas Operator | Nov 1998 |
| 5551 | Ciervo Resources Asset Holding, LLC | Houston, TX 77056 | Oil & Gas Operator | Jun 2026 |
| 5552 | Cig Exploration | Denver, CO 80201 | Oil & Gas Operator | Sep 1999 |
| 5553 | Cig Exploration Inc | Houston, TX 77046 | Oil & Gas Operator | Nov 1999 |
| 5554 | Cig Resources Company | Colorado Spring, CO 80944-1087 | Oil & Gas Operator | Jun 2018 |
| 5555 | Cigna Energy Resources Inc | Englewood, CO 80155-5038 | Oil Operator | Nov 1998 |
| 5556 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Jun 2026 |
| 5557 | Cimarex Energy Co Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Mar 2026 |
| 5558 | Cimaron Oil & Gas Company Of Oklahoma | Davis, OK 73030-9762 | Oil Operator | Mar 2026 |
| 5559 | Cimarron Engineering Corp. | Kingsville, TX 78364 | Oil & Gas Operator | May 2015 |
| 5560 | Cimarron Engineering, LLC | Kingsville, TX 78364 | Oil & Gas Operator | Jun 2026 |
| 5561 | Cimarron Management Corp | | Oil & Gas Operator | Jul 2020 |
| 5562 | Cimarron Oil & Gas Inc | Perry, OK 73077-1318 | Oil & Gas Operator | Sep 2000 |
| 5563 | Cimarron Operating Company | Oklahoma City, OK 73112-3967 | Oil & Gas Operator | May 2011 |
| 5564 | Cimarron Petroleum Corporation | Houston, TX 77057-2696 | Oil & Gas Operator | Mar 2026 |
| 5565 | Cimarron Production Co Inc | Oklahoma City, OK 73142-3017 | Oil & Gas Operator | Mar 2026 |
| 5566 | Cimarron Properties, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | Nov 1997 |
| 5567 | Cimarron River Operating Co | Mannford, OK 74044 | Oil & Gas Operator | Apr 2026 |
| 5568 | Cimarron Valley Energy Inc | Stillwater, OK 74076 | Oil Operator | Apr 2015 |
| 5569 | Cimic Energy, LLC | | Oil Operator | Jan 2025 |
| 5570 | Ciminello, Angeline | Fredonia, NY 14063 | Gas Operator | Dec 2024 |
| 5571 | Cinab, Inc. | FT. Scott, KS 66701 | Oil Operator | Jan 1998 |
| 5572 | Cinco Exploratio | | Oil & Gas Operator | Jan 1988 |
| 5573 | Cinco General Partnership | Albuquerque, NM 87103 | Oil & Gas Operator | Oct 1999 |
| 5574 | Cinco Natural Resources Corp | La Grange, TX 78945 | Oil & Gas Operator | Jun 2026 |
| 5575 | Cinco Oil & Gas, LLC | Irving, TX 75039 | Oil & Gas Operator | Jan 2026 |
| 5576 | Cincris Energy C | | Oil & Gas Operator | Jun 1991 |
| 5577 | Cinder Production Company | | Oil & Gas Operator | Apr 2014 |
| 5578 | Cinnabar Energy, LTD. | Fort Worth, TX 76107 | Oil & Gas Operator | May 2018 |
| 5579 | Cinnabar Operating, LLC | Fort Worth, TX 76121 | Oil & Gas Operator | Jun 2026 |
| 5580 | Cinnamon Creek Oil & Gas Inc | | Oil Operator | Apr 2026 |
| 5581 | Cinron Energy, LLC | Arp, TX 75750 | Oil & Gas Operator | Jun 2026 |
| 5582 | Circle "M" Energy Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Aug 2003 |
| 5583 | Circle 9 Resources LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Mar 2026 |
| 5584 | Circle B Oil & Gas | Bowie, TX 76230 | Oil & Gas Operator | Dec 2021 |
| 5585 | Circle C Oilfield Supply Inc | Wetumka, OK 74883-0068 | Oil & Gas Operator | Apr 2017 |
| 5586 | Circle C Operations | Winnsboro, TX 75494 | Oil Operator | Jun 2026 |
| 5587 | Circle D Oil & Gas, Inc. | Brownwood, TX 76801 | Oil & Gas Operator | Jun 2026 |
| 5588 | Circle E Oil - E | | Oil Operator | May 1990 |
| 5589 | Circle H Oil Company | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2020 |
| 5590 | Circle K Enterprises | | Oil & Gas Operator | Aug 2023 |
| 5591 | Circle K Oil & Gas Inc | Sand Springs, OK 74063 | Oil & Gas Operator | Apr 2026 |
| 5592 | Circle Ridge Production, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 5593 | Circle T Oil | | Oil Operator | Nov 2024 |
| 5594 | Circle W Oil & Gas Company | Pampa, TX 79066 | Oil & Gas Operator | Jun 2026 |
| 5595 | Circle-S Energy, LLC | McKinney, TX 75071 | Oil & Gas Operator | Jun 2026 |
| 5596 | Circleville Gas Co | Westerville, OH 43081 | Oil & Gas Operator | Dec 2004 |
| 5597 | Ciri Production Company | | Gas Operator | Mar 1994 |
| 5598 | Ciris Energy Inc | Centennial, CO 80112 | Gas Operator | Dec 2016 |
| 5599 | Cirque Resources LP | Denver, CO 80202 | Oil & Gas Operator | Aug 2016 |
| 5600 | Cirrus Exploration Company | Prosper, TX 75078 | Oil & Gas Operator | Jun 2026 |