| 1301 | Choctaw II Oil & Gas, LTD. | Houston, TX 77002 | Oil & Gas Operator | Jan 2002 |
| 1302 | Choctaw Resources, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Dec 2019 |
| 1303 | Choice Exploration, Inc. | Irving, TX 75063 | Oil & Gas Operator | Apr 2026 |
| 1304 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Apr 2026 |
| 1305 | Cholla Production LLC | Littleton, CO 80127 | Oil & Gas Operator | Dec 2025 |
| 1306 | Cholla Resources | | Oil Operator | Oct 1995 |
| 1307 | Cholla Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jan 1997 |
| 1308 | Chooch Incorpora | | Gas Operator | Dec 1994 |
| 1309 | CHP Oil & Gas Company, L.C. | El Campo, TX 77437 | Oil & Gas Operator | Apr 2026 |
| 1310 | Chriestenson Oil LLC | Neosho Falls, KS 66758 | Oil Operator | Dec 2025 |
| 1311 | Chris Batchman Inc. | Ellinwood, KS 67526 | Oil Operator | Dec 2025 |
| 1312 | Chris Glade Oil & Gas, LLC | | Gas Operator | Dec 2011 |
| 1313 | Chris Melander Drilling | | Oil Operator | Jun 2015 |
| 1314 | Chris Oil Co | Cambridge, OH 43725 | Oil & Gas Operator | Nov 2008 |
| 1315 | Chriscor Oil & Gas | Plana, TX 75075 | Oil & Gas Operator | Jul 1987 |
| 1316 | Chrisman Drilling Co. | Pennsboro, WV 26415 | Oil & Gas Operator | Dec 2021 |
| 1317 | Christa Oil Co | Cumberland, OH 43732 | Oil & Gas Operator | Nov 1999 |
| 1318 | Christa Oil Comp | | Oil Operator | Nov 1994 |
| 1319 | Christensen & Matthews | Houston, TX 77040 | Oil & Gas Operator | Apr 2026 |
| 1320 | Christensen C G | | Oil Operator | Sep 1990 |
| 1321 | Christensen Ranch | Newcastle, WY 82701 | Oil Operator | Feb 2026 |
| 1322 | Christeve Oil Company, Inc. | Houston, TX 77068 | Oil & Gas Operator | Dec 2022 |
| 1323 | Christian Airmen, Incorporated | Akron, NY 14001 | Gas Operator | Dec 2024 |
| 1324 | Christian Energy, Inc. | Mandeville, LA 70470 | Oil & Gas Operator | Mar 2008 |
| 1325 | Christian Oil Co | | Oil & Gas Operator | Feb 2026 |
| 1326 | Christian Operating Company | Cypress, TX 77429 | Oil & Gas Operator | Dec 2014 |
| 1327 | Christian Well Service | | Oil & Gas Operator | May 1987 |
| 1328 | Christico Petroleum Company | San Antonio, TX 78216 | Oil & Gas Operator | Apr 2026 |
| 1329 | Christie Jr C B | Wichita Falls, TX 76308-4873 | Oil & Gas Operator | May 2024 |
| 1330 | Christie Oil Co., Inc | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 1996 |
| 1331 | Christie, C. B., Jr. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2014 |
| 1332 | Christine Marie Exploration LP | Indiana, PA 15701-0515 | Oil & Gas Operator | Dec 2025 |
| 1333 | Christman Rosalie | Woodsfield, OH 43793 | Oil & Gas Operator | Dec 2025 |
| 1334 | Christmann Energy Corp. | | Oil & Gas Operator | Feb 1991 |
| 1335 | Christmann John J | Lubbock, TX 79401 | Oil & Gas Operator | Dec 1994 |
| 1336 | Christopher Oil & Gas Inc | Fulshear, TX 77441 | Oil & Gas Operator | Apr 2015 |
| 1337 | Chroma Operating, Inc. | Washington, DC 20036 | Oil & Gas Operator | Jun 2016 |
| 1338 | CHS McPherson Refinery Inc | Platteville, CO 80651 | Oil & Gas Operator | Apr 1994 |
| 1339 | Chuck Henry Energy LLC | Wellsville, NY 14895 | Oil Operator | Dec 2024 |
| 1340 | Chumley, George Estate Of | Alice, TX 78333 | Oil & Gas Operator | Apr 2026 |
| 1341 | Church Ranch, LLC | Lubbock, TX 79423 | Oil Operator | Apr 2026 |
| 1342 | Church, Steve | Philpot, KY 42366 | Oil & Gas Operator | Dec 2022 |
| 1343 | Churchill Energy, Inc. | | Oil & Gas Operator | Aug 2020 |
| 1344 | Chute Ray C | Logan, OH 43138 | Oil & Gas Operator | Dec 2014 |
| 1345 | Chuza Oil Company | Farmington, NM 87402 | Oil Operator | Dec 2017 |
| 1346 | Chuza Operating | Midland, TX 79710 | Oil & Gas Operator | Sep 2006 |
| 1347 | Cibco Resources, LLC | | Oil & Gas Operator | Nov 2024 |
| 1348 | Cibola Energy Corp | Albuquerque, NM 87103 | Oil & Gas Operator | Oct 2017 |
| 1349 | Cibolo Energy Operating, Inc. | Bulverde, TX 78163 | Oil & Gas Operator | Apr 2026 |
| 1350 | Cibolo Production, LLC | Boerne, TX 78006 | Oil Operator | Jan 2020 |
| 1351 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 1352 | Ciera Resources, Inc. | | Gas Operator | Nov 1998 |
| 1353 | Ciervo Resources Asset Holding, LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2026 |
| 1354 | Cig Exploration | Denver, CO 80201 | Oil & Gas Operator | Sep 1999 |
| 1355 | Cig Exploration Inc | Houston, TX 77046 | Oil & Gas Operator | Nov 1999 |
| 1356 | Cig Resources Company | Colorado Spring, CO 80944-1087 | Oil & Gas Operator | Jun 2018 |
| 1357 | Cigna Energy Resources Inc | Englewood, CO 80155-5038 | Oil Operator | Nov 1998 |
| 1358 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 1359 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 1360 | Cimarron Engineering Corp. | Kingsville, TX 78364 | Oil & Gas Operator | May 2015 |
| 1361 | Cimarron Engineering, LLC | Kingsville, TX 78364 | Oil & Gas Operator | Apr 2026 |
| 1362 | Cimarron Management Corp | | Oil & Gas Operator | Jul 2020 |
| 1363 | Cimarron Oil & Gas Inc | Perry, OK 73077-1318 | Oil & Gas Operator | Sep 2000 |
| 1364 | Cimarron Operating Company | Oklahoma City, OK 73112-3967 | Oil & Gas Operator | May 2011 |
| 1365 | Cimarron Petroleum Corporation | Houston, TX 77057-2696 | Oil & Gas Operator | Jan 2026 |
| 1366 | Cimarron Production Co Inc | Oklahoma City, OK 73142-3017 | Oil & Gas Operator | Jan 2026 |
| 1367 | Cimarron Properties, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | Nov 1997 |
| 1368 | Cimarron River Operating Co | Mannford, OK 74044 | Oil & Gas Operator | Feb 2026 |
| 1369 | Cimarron Valley Energy Inc | Stillwater, OK 74076 | Oil Operator | Apr 2015 |
| 1370 | Cimic Energy, LLC | | Oil Operator | Jan 2025 |
| 1371 | Ciminello, Angeline | Fredonia, NY 14063 | Gas Operator | Dec 2024 |
| 1372 | Cinab, Inc. | FT. Scott, KS 66701 | Oil Operator | Jan 1998 |
| 1373 | Cinco Exploratio | | Oil & Gas Operator | Jan 1988 |
| 1374 | Cinco General Partnership | Albuquerque, NM 87103 | Oil & Gas Operator | Oct 1999 |
| 1375 | Cinco Natural Resources Corp | La Grange, TX 78945 | Oil & Gas Operator | Apr 2026 |
| 1376 | Cinco Oil & Gas, LLC | Irving, TX 75039 | Oil & Gas Operator | Apr 2026 |
| 1377 | Cincris Energy C | | Oil & Gas Operator | Jun 1991 |
| 1378 | Cinder Production Company | | Oil & Gas Operator | Apr 2014 |
| 1379 | Cinnabar Energy, LTD. | Fort Worth, TX 76107 | Oil & Gas Operator | May 2018 |
| 1380 | Cinnabar Operating, LLC | Fort Worth, TX 76121 | Oil & Gas Operator | Apr 2026 |
| 1381 | Cinnamon Creek Oil & Gas Inc | | Oil Operator | Jan 2026 |
| 1382 | Cinron Energy, LLC | Arp, TX 75750 | Oil & Gas Operator | Apr 2026 |
| 1383 | Cippele Resources Co. | Longview, TX 75608 | Oil & Gas Operator | May 1994 |
| 1384 | Circle "M" Energy Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Aug 2003 |
| 1385 | Circle 9 Resources LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Jan 2026 |
| 1386 | Circle B Oil & Gas | Bowie, TX 76230 | Oil & Gas Operator | Dec 2021 |
| 1387 | Circle C Oilfield Supply Inc | Wetumka, OK 74883-0068 | Oil & Gas Operator | Apr 2017 |
| 1388 | Circle C Operations | Winnsboro, TX 75494 | Oil Operator | Apr 2026 |
| 1389 | Circle D Oil & Gas, Inc. | Brownwood, TX 76801 | Oil & Gas Operator | Apr 2026 |
| 1390 | Circle E Oil - E | | Oil Operator | May 1990 |
| 1391 | Circle H Oil Company | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2020 |
| 1392 | Circle K Enterprises | | Oil & Gas Operator | Aug 2023 |
| 1393 | Circle K Oil & Gas Inc | Sand Springs, OK 74063 | Oil & Gas Operator | Feb 2026 |
| 1394 | Circle Ridge Production, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 1395 | Circle T Oil | | Oil Operator | Nov 2024 |
| 1396 | Circle W Oil & Gas Company | Pampa, TX 79066 | Oil & Gas Operator | Apr 2026 |
| 1397 | Circle-S Energy, LLC | McKinney, TX 75071 | Oil & Gas Operator | Apr 2026 |
| 1398 | Circleville Gas Co | Westerville, OH 43081 | Oil & Gas Operator | Dec 2004 |
| 1399 | Ciri Production Company | | Gas Operator | Mar 1994 |
| 1400 | Ciris Energy Inc | Centennial, CO 80112 | Gas Operator | Dec 2016 |