| 1301 | Chipper Energy LLC | Magnolia, OH 44643 | Oil & Gas Operator | Dec 2024 |
| 1302 | Chippewa Cree Tribe | | Gas Operator | May 2025 |
| 1303 | Chippewa Oil & Gas Inc | Douglas, WY 82633 | Oil & Gas Operator | Jan 1985 |
| 1304 | Chisholm Energy Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2022 |
| 1305 | Chisholm Exploration | Abilene, TX 79604 | Oil & Gas Operator | Jul 2025 |
| 1306 | Chisholm Oil & Gas, LC | Buda, TX 78610 | Oil & Gas Operator | Jul 2025 |
| 1307 | Chisholm Oil And Gas Operating LLC | Tulsa, OK 74103-3522 | Oil & Gas Operator | May 2025 |
| 1308 | Chisholm Oil Investments | Seabrook, TX 77586 | Oil & Gas Operator | Jul 2025 |
| 1309 | Chisholm Operating LLC | Oklahoma City, OK 73101-1502 | Oil & Gas Operator | Dec 2017 |
| 1310 | Chisholm Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Jul 2025 |
| 1311 | Chisholm Trail Resources, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Nov 2002 |
| 1312 | Chisler Brothers Contracting Limited Liability Company | Pentress, WV 26544-0000 | Oil & Gas Operator | Dec 2021 |
| 1313 | Chisler, F. M. | Clemmons, NC 27012 | Oil & Gas Operator | Jul 2021 |
| 1314 | Chisos Exploration Inc | Enid, OK 73703 | Oil & Gas Operator | Dec 2004 |
| 1315 | Chisos Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 1316 | Chisos, LTD | Houston, TX 77098 | Oil & Gas Operator | Jul 2025 |
| 1317 | Chisum G H | Duncan, OK 73533 | Oil & Gas Operator | Dec 2010 |
| 1318 | Chisum Oil & Gas, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Mar 2025 |
| 1319 | Chisum Resources | Shallowater, TX 79363 | Oil Operator | Jul 2025 |
| 1320 | Chital Petroleum Corp. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2000 |
| 1321 | Chittim Operating LLC | Houston, TX 77079 | Oil & Gas Operator | Jul 2025 |
| 1322 | Chizum Oil LLC | Wichita, KS 67211 | Oil & Gas Operator | Apr 2025 |
| 1323 | Chmelar, Eugene Oil & Gas | Caldwell, TX 77836 | Oil & Gas Operator | Jul 2025 |
| 1324 | Choate Kenny Dba Rebound Oil Co | Helena, OK 73741-0543 | Gas Operator | May 2025 |
| 1325 | Chockley Energy LLC | Beaver, OK 73932 | Gas Operator | Apr 2025 |
| 1326 | Choctaw Gas Company | Quinton, OK 74561 | Gas Operator | Apr 2025 |
| 1327 | Choctaw Holdings, Inc. | | Oil Operator | Dec 1974 |
| 1328 | Choctaw II Oil & Gas, LTD. | Houston, TX 77002 | Oil & Gas Operator | Jan 2002 |
| 1329 | Choctaw Resources, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Dec 2019 |
| 1330 | Choice Exploration, Inc. | Irving, TX 75063 | Oil & Gas Operator | Jul 2025 |
| 1331 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Jul 2025 |
| 1332 | Cholla Production LLC | Littleton, CO 80127 | Oil & Gas Operator | Mar 2025 |
| 1333 | Cholla Resources | | Oil Operator | Oct 1995 |
| 1334 | Cholla Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jan 1997 |
| 1335 | Chooch Incorpora | | Gas Operator | Dec 1994 |
| 1336 | CHP Oil & Gas Company, L.C. | El Campo, TX 77437 | Oil & Gas Operator | Jul 2025 |
| 1337 | Chriestenson Oil LLC | Neosho Falls, KS 66758 | Oil Operator | Mar 2025 |
| 1338 | Chris Batchman Inc. | Ellinwood, KS 67526 | Oil Operator | Mar 2025 |
| 1339 | Chris Glade Oil & Gas, LLC | | Gas Operator | Dec 2011 |
| 1340 | Chris Melander Drilling | | Oil Operator | Jun 2015 |
| 1341 | Chris Oil Co | Cambridge, OH 43725 | Oil & Gas Operator | Nov 2008 |
| 1342 | Chriscor Oil & Gas | Plana, TX 75075 | Oil & Gas Operator | Jul 1987 |
| 1343 | Chrisman Drilling Co. | Pennsboro, WV 26415 | Oil & Gas Operator | Dec 2021 |
| 1344 | Christa Oil Co | Cumberland, OH 43732 | Oil & Gas Operator | Nov 1999 |
| 1345 | Christa Oil Comp | | Oil Operator | Nov 1994 |
| 1346 | Christensen & Matthews | Houston, TX 77040 | Oil & Gas Operator | Jul 2025 |
| 1347 | Christensen C G | | Oil Operator | Sep 1990 |
| 1348 | Christensen Ranch | Newcastle, WY 82701 | Oil Operator | Aug 2021 |
| 1349 | Christeve Oil Company, Inc. | Houston, TX 77068 | Oil & Gas Operator | Dec 2022 |
| 1350 | Christian Airmen, Incorporated | Akron, NY 14001 | Gas Operator | Dec 2024 |
| 1351 | Christian Bros Op Co Inc | Ada, OK 74820 | Oil & Gas Operator | Apr 2014 |
| 1352 | Christian Energy, Inc. | Mandeville, LA 70470 | Oil & Gas Operator | Mar 2008 |
| 1353 | Christian Oil Co | | Oil & Gas Operator | Apr 2025 |
| 1354 | Christian Operating Company | Cypress, TX 77429 | Oil & Gas Operator | Dec 2014 |
| 1355 | Christian Well Service | | Oil & Gas Operator | May 1987 |
| 1356 | Christico Petroleum Company | San Antonio, TX 78216 | Oil & Gas Operator | Jul 2025 |
| 1357 | Christie Jr C B | Wichita Falls, TX 76308-4873 | Oil & Gas Operator | May 2024 |
| 1358 | Christie Oil Co., Inc | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 1996 |
| 1359 | Christie, C. B., Jr. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2014 |
| 1360 | Christine Marie Exploration LP | Indiana, PA 15701-0515 | Oil & Gas Operator | Dec 2024 |
| 1361 | Christman Rosalie | Woodsfield, OH 43793 | Oil & Gas Operator | Dec 2024 |
| 1362 | Christmann Energy Corp. | | Oil & Gas Operator | Feb 1991 |
| 1363 | Christmann John J | Lubbock, TX 79401 | Oil & Gas Operator | Dec 1994 |
| 1364 | Christopher Oil & Gas Inc | Fulshear, TX 77441 | Oil & Gas Operator | Apr 2015 |
| 1365 | Chroma Operating, Inc. | Washington, DC 20036 | Oil & Gas Operator | Jun 2016 |
| 1366 | CHS McPherson Refinery Inc | Platteville, CO 80651 | Oil & Gas Operator | Apr 1994 |
| 1367 | Chuck Henry Energy LLC | Wellsville, NY 14895 | Oil Operator | Dec 2024 |
| 1368 | Chumley, George Estate Of | Alice, TX 78333 | Oil & Gas Operator | Jul 2025 |
| 1369 | Church Ranch, LLC | Lubbock, TX 79423 | Oil Operator | Jul 2025 |
| 1370 | Church, Steve | Philpot, KY 42366 | Oil & Gas Operator | Dec 2022 |
| 1371 | Churchill Energy Inc | | Oil & Gas Operator | Sep 2020 |
| 1372 | Chute Ray C | Logan, OH 43138 | Oil & Gas Operator | Dec 2014 |
| 1373 | Chuza Oil Company | Farmington, NM 87402 | Oil Operator | Dec 2017 |
| 1374 | Chuza Operating | Midland, TX 79710 | Oil & Gas Operator | Sep 2006 |
| 1375 | Cibco Resources, LLC | | Oil & Gas Operator | Nov 2024 |
| 1376 | Cibola Energy Corporation | Albuquerque, NM 87103 | Oil & Gas Operator | Oct 2017 |
| 1377 | Cibolo Energy Operating, Inc. | Bulverde, TX 78163 | Oil & Gas Operator | Jul 2025 |
| 1378 | Cibolo Production, LLC | Boerne, TX 78006 | Oil Operator | Jan 2020 |
| 1379 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 1380 | Ciera Resources, Inc. | | Gas Operator | Nov 1998 |
| 1381 | Ciervo Resources Asset Holding, LLC | Houston, TX 77056 | Oil & Gas Operator | Jul 2025 |
| 1382 | Cig Exploration | Denver, CO 80201 | Oil & Gas Operator | Sep 1999 |
| 1383 | Cig Exploration Inc | Houston, TX 77046 | Oil & Gas Operator | Nov 1999 |
| 1384 | Cig Resources Company | Colorado Spring, CO 80944-1087 | Oil & Gas Operator | Jun 2018 |
| 1385 | Cigna Energy Resources Inc | Englewood, CO 80155-5038 | Oil Operator | Nov 1998 |
| 1386 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Jul 2025 |
| 1387 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Jul 2025 |
| 1388 | Cimarron Engineering Corp. | Kingsville, TX 78364 | Oil & Gas Operator | May 2015 |
| 1389 | Cimarron Engineering, LLC | Kingsville, TX 78364 | Oil & Gas Operator | Jul 2025 |
| 1390 | Cimarron Management Corp | | Oil & Gas Operator | Jul 2020 |
| 1391 | Cimarron Oil & Gas Inc | Perry, OK 73077-1318 | Oil & Gas Operator | Sep 2000 |
| 1392 | Cimarron Operating Company | Oklahoma City, OK 73112-3967 | Oil & Gas Operator | May 2011 |
| 1393 | Cimarron Petroleum Corporation | Houston, TX 77057-2696 | Oil & Gas Operator | Apr 2025 |
| 1394 | Cimarron Production Co Inc | Oklahoma City, OK 73142-3017 | Oil & Gas Operator | Apr 2025 |
| 1395 | Cimarron Properties, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | Nov 1997 |
| 1396 | Cimarron River Operating Co | Mannford, OK 74044 | Oil & Gas Operator | Apr 2025 |
| 1397 | Cimarron Valley Energy Inc | Stillwater, OK 74076 | Oil Operator | Apr 2015 |
| 1398 | Cimic Energy, LLC | | Oil Operator | Jan 2025 |
| 1399 | Ciminello, Angeline | Fredonia, NY 14063 | Gas Operator | Dec 2024 |
| 1400 | Cinab, Inc. | FT. Scott, KS 66701 | Oil Operator | Jan 1998 |