| 1401 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 1402 | Enex Resources C | | Gas Operator | Nov 1987 |
| 1403 | Enex Resources Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2009 |
| 1404 | Engel Farms Corporation | Liberal, KS 67901 | Gas Operator | Mar 2003 |
| 1405 | Engel Investments LLC | Hays, KS 67601 | Oil Operator | Oct 2024 |
| 1406 | Enmark Gas Gathering L. P. | Dallas, TX 75252 | Oil & Gas Operator | Mar 2025 |
| 1407 | Enoch Oil | Wichita, KS 67216 | Oil Operator | Jan 2001 |
| 1408 | Enron Corporatio | | Oil & Gas Operator | Aug 1999 |
| 1409 | Ensign Oil & Gas Inc. | | Oil & Gas Operator | Jul 1993 |
| 1410 | Ensign Operating | | Oil & Gas Operator | Oct 1994 |
| 1411 | Ensminger D & J | | Oil Operator | Dec 1994 |
| 1412 | Ensminger Energy LLC | Moran, KS 66755 | Oil Operator | Mar 2025 |
| 1413 | Ensminger Oil, LLC | Moran, KS 66755 | Oil Operator | Mar 2025 |
| 1414 | Ensminger, Donald & Jack, A General Partnership | Moran, KS 66755 | Oil Operator | Jun 2005 |
| 1415 | Ensz, Jerry | Sublette, KS 67877 | Gas Operator | Mar 2025 |
| 1416 | Enterprise Inc | Hays, KS 67601 | Oil Operator | Sep 2015 |
| 1417 | Enterprise Marke | | Oil & Gas Operator | Oct 1992 |
| 1418 | Enterprise Oil Marketing Corp. | Little Rock, AR 72206 | Oil Operator | Sep 1998 |
| 1419 | Enterra Resources, LLC | Edmond, OK 73083 | Oil & Gas Operator | Mar 2025 |
| 1420 | Entransco Energy LLC | Dewey, OK 74029 | Oil & Gas Operator | Oct 2024 |
| 1421 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 1422 | Epoc, LLC | Andover, KS 67002 | Oil Operator | Mar 2025 |
| 1423 | Eps Resources Corp | Englewood, CO 80111 | Oil & Gas Operator | Dec 2009 |
| 1424 | Equinox Oil Comp | | Oil Operator | Dec 1996 |
| 1425 | Equinox Oil Company | Plainville, KS 67663 | Oil & Gas Operator | Dec 2019 |
| 1426 | Erbe, Dwayne E. (Estate) | Neodesha, KS 66757 | Oil Operator | Dec 2024 |
| 1427 | Erbert Don Oil C | | Oil Operator | May 1993 |
| 1428 | Erbert, Harold | Iola, KS 66749 | Oil Operator | Dec 1992 |
| 1429 | Ernst & Steinle | | Oil Operator | Oct 1991 |
| 1430 | Ers Operating Company LLC | Bothell, WA 98012 | Oil & Gas Operator | Jun 2016 |
| 1431 | Escher Corporation | Oklahoma City, OK 73120 | Oil & Gas Operator | May 2025 |
| 1432 | Esp Development, Inc. | Salina, KS 67401 | Oil Operator | Mar 2025 |
| 1433 | Essex Resources, LLC | Coffeyville, KS 67337 | Oil Operator | Mar 2025 |
| 1434 | Estate Of Crawford Oil & Gas, Inc. | Midland, TX 79705 | Oil & Gas Operator | Aug 2006 |
| 1435 | Eternity Exploration, LLC | Coppell, TX 75019 | Oil Operator | Feb 2025 |
| 1436 | Eufaula Enterpri | | Oil & Gas Operator | Mar 1986 |
| 1437 | Euram Petroleum | | Oil Operator | Apr 1986 |
| 1438 | Evans Douglas G | | Oil Operator | Aug 1987 |
| 1439 | Evans Energy, LLC | Mount Hope, KS 67108 | Oil & Gas Operator | Mar 2025 |
| 1440 | Evans John Roy | | Oil Operator | Nov 1992 |
| 1441 | Evans Oil D W - | | Oil Operator | Mar 1992 |
| 1442 | Evans Oil Inc. | Lebo, KS 66856 | Oil Operator | Mar 2025 |
| 1443 | Evans Well Service | | Oil Operator | Oct 2013 |
| 1444 | Evans, Glenn A. | Paola, KS 66071 | Oil Operator | Oct 1989 |
| 1445 | Evans, Jay - Oil Company | Iola, KS 66749 | Oil Operator | Apr 2001 |
| 1446 | Evenson Oil Oper | | Oil Operator | Nov 1991 |
| 1447 | Everglow Energy, LLC | Oklahoma City, OK 73162 | Oil & Gas Operator | Mar 2025 |
| 1448 | Evergreen Operating Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 1449 | Evertson Oil Company Inc | Kimball, NE 69145 | Oil & Gas Operator | Sep 2001 |
| 1450 | Evolution Oil & | | Oil & Gas Operator | Apr 1993 |
| 1451 | Excalibur Prod C | | Oil & Gas Operator | Jun 1995 |
| 1452 | Excalibur Production Company, Inc. | McPherson, KS 67460 | Oil & Gas Operator | Mar 2025 |
| 1453 | Excel Oil & Gas L.L.C. | Bucyrus, KS 66013 | Oil Operator | Mar 2025 |
| 1454 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Apr 2025 |
| 1455 | Exodus Gas & Oil LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2024 |
| 1456 | Exok, Inc. | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2025 |
| 1457 | Extreme Energy Co | | Oil & Gas Operator | Mar 2025 |
| 1458 | Exxon Corporatio | | Oil & Gas Operator | Dec 1995 |
| 1459 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 1460 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Jul 2025 |
| 1461 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | May 2025 |
| 1462 | F & M Oil Compan | | Oil & Gas Operator | Feb 1993 |
| 1463 | F & M Oil Company Inc | Pettus, TX 78146 | Oil & Gas Operator | Jul 2025 |
| 1464 | F & S Oil | | Oil Operator | Dec 2021 |
| 1465 | F E W Oil Compan | | Oil Operator | Jul 1993 |
| 1466 | F.D. Looman | Sedan, KS 67361 | Oil Operator | Jun 2008 |
| 1467 | F.E.W. Oil Co. | Oceanside, CA 92058 | Oil Operator | Oct 2012 |
| 1468 | F.G. Holl Co., LLC | Wichita, KS 67206 | Oil & Gas Operator | Mar 2025 |
| 1469 | Fadely, Dale Leon | Sedan, KS 67361 | Oil & Gas Operator | Dec 2009 |
| 1470 | Fair Banks Enterprises | Chanute, KS 66720 | Oil Operator | Mar 2013 |
| 1471 | Fair Oil, LTD. | Tyler, TX 75710 | Oil & Gas Operator | Jul 2025 |
| 1472 | Fair Seas Enterp | | Oil & Gas Operator | Jun 1988 |
| 1473 | Fairchild Explor | | Oil & Gas Operator | Apr 1995 |
| 1474 | Fairchild, Bob | Kingman, KS 67068 | Oil Operator | Jan 2001 |
| 1475 | Fairway Petroleu | | Oil & Gas Operator | Dec 1994 |
| 1476 | Fairway Petroleum, Inc. | Stafford, TX 77497 | Oil & Gas Operator | Nov 2001 |
| 1477 | Faith Partners I | | Oil Operator | Feb 1989 |
| 1478 | Faith Petroleum, Inc. | Arkansas City, KS 67005 | Oil & Gas Operator | Mar 2025 |
| 1479 | Falcon Energy Co | | Oil Operator | Apr 1992 |
| 1480 | Falcon Explorati | | Oil & Gas Operator | Apr 1995 |
| 1481 | Falcon Exploration | | Oil Operator | Dec 1994 |
| 1482 | Falcon Exploration, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Mar 2025 |
| 1483 | Falkin, Richard T. | Hepler, KS 66746 | Oil Operator | Nov 2019 |
| 1484 | Fancher Oil Co. | | Oil & Gas Operator | Sep 1995 |
| 1485 | Fancher Oil Comp | | Oil & Gas Operator | Aug 1995 |
| 1486 | Fancher, Geo. H, Jr. | Denver, CO 80202 | Gas Operator | Mar 1996 |
| 1487 | Fanshier, Roger | Seward, KS 67576 | Oil Operator | Oct 2008 |
| 1488 | Farmer Dog Oil Co., A General Partnership | Humboldt, KS 66748 | Oil Operator | Mar 2025 |
| 1489 | Farmer, John O., Inc. | Russell, KS 67665 | Oil & Gas Operator | Mar 2025 |
| 1490 | Farrar Oilwell S | | Oil & Gas Operator | Jul 1986 |
| 1491 | Farrar Pump & Su | | Oil & Gas Operator | Dec 1996 |
| 1492 | Farrar Pump & Supply Co., Inc. | Medicine Lodge, KS 67104 | Oil & Gas Operator | Jun 2009 |
| 1493 | Farris Oil, Inc. | Sedan, KS 67361 | Oil Operator | Dec 2024 |
| 1494 | Farris Well Service | | Oil & Gas Operator | Dec 2021 |
| 1495 | Farthing Don Oil | | Oil & Gas Operator | Jun 1994 |
| 1496 | Fastrak Energy, LLC | Cherryvale, KS 67335 | Oil & Gas Operator | Mar 2025 |
| 1497 | Faulconer Vernon E Inc | Tyler, TX 75711 | Oil & Gas Operator | May 2025 |
| 1498 | Fe Co. | Derby, KS 67037 | Oil & Gas Operator | Dec 2009 |
| 1499 | Fell Oil & Gas C | | Oil Operator | Oct 1991 |
| 1500 | Fender, Mildred A. | Russell, KS 67665 | Oil & Gas Operator | Jun 2000 |