| 1501 | Everly Company I | | Oil & Gas Operator | Sep 1981 |
| 1502 | Evertson Oil Company Inc | Kimball, NE 69145 | Oil & Gas Operator | Sep 2001 |
| 1503 | Evolution Oil & | | Oil & Gas Operator | Apr 1993 |
| 1504 | Excalibur Prod C | | Oil & Gas Operator | Jun 1995 |
| 1505 | Excalibur Production Company, Inc. | McPherson, KS 67460 | Oil & Gas Operator | Sep 2025 |
| 1506 | Excel Oil & Gas L.L.C. | Bucyrus, KS 66013 | Oil Operator | Sep 2025 |
| 1507 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Nov 2025 |
| 1508 | Executive Proper | | Gas Operator | Oct 1993 |
| 1509 | Exodus Gas & Oil LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2024 |
| 1510 | Exok Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Nov 2025 |
| 1511 | Extreme Energy Co | | Oil & Gas Operator | Sep 2025 |
| 1512 | Exxon Corporatio | | Oil & Gas Operator | Dec 1995 |
| 1513 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Feb 2026 |
| 1514 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Feb 2026 |
| 1515 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Sep 2025 |
| 1516 | F & M Oil Compan | | Oil & Gas Operator | Feb 1993 |
| 1517 | F & M Oil Company Inc | Pettus, TX 78146 | Oil & Gas Operator | Feb 2026 |
| 1518 | F & S Oil | | Oil Operator | Dec 2021 |
| 1519 | F E W Oil Compan | | Oil Operator | Jul 1993 |
| 1520 | F.D. Looman | Sedan, KS 67361 | Oil Operator | Jun 2008 |
| 1521 | F.E.W. Oil Co. | Oceanside, CA 92058 | Oil Operator | Oct 2012 |
| 1522 | F.G. Holl Co., LLC | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 1523 | Fadely, Dale Leon | Sedan, KS 67361 | Oil & Gas Operator | Dec 2009 |
| 1524 | Fair Banks Enterprises | Chanute, KS 66720 | Oil Operator | Mar 2013 |
| 1525 | Fair Oil, LTD. | Tyler, TX 75710 | Oil & Gas Operator | Feb 2026 |
| 1526 | Fair Seas Enterp | | Oil & Gas Operator | Jun 1988 |
| 1527 | Fairchild Explor | | Oil & Gas Operator | Apr 1995 |
| 1528 | Fairchild, Bob | Kingman, KS 67068 | Oil Operator | Jan 2001 |
| 1529 | Fairway Petroleu | | Oil & Gas Operator | Dec 1994 |
| 1530 | Fairway Petroleum Inc | Stafford, TX 77497 | Oil & Gas Operator | Nov 2001 |
| 1531 | Faith Partners I | | Oil Operator | Feb 1989 |
| 1532 | Faith Petroleum, Inc. | Arkansas City, KS 67005 | Oil & Gas Operator | Sep 2025 |
| 1533 | Falcon Energy Co | | Oil Operator | Apr 1992 |
| 1534 | Falcon Explorati | | Oil & Gas Operator | Apr 1995 |
| 1535 | Falcon Exploration | | Oil Operator | Dec 1994 |
| 1536 | Falcon Exploration, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |
| 1537 | Falkin, Richard T. | Hepler, KS 66746 | Oil Operator | Nov 2019 |
| 1538 | Fancher Oil Co. | | Oil & Gas Operator | Sep 1995 |
| 1539 | Fancher Oil Comp | | Oil & Gas Operator | Aug 1995 |
| 1540 | Fancher, Geo. H, Jr. | Denver, CO 80202 | Gas Operator | Mar 1996 |
| 1541 | Fanshier, Roger | Seward, KS 67576 | Oil Operator | Oct 2008 |
| 1542 | Farmer Dog Oil Co., A General Partnership | Humboldt, KS 66748 | Oil Operator | Sep 2025 |
| 1543 | Farmer John O Inc | Russell, KS 67665 | Oil & Gas Operator | Sep 2025 |
| 1544 | Farrar Oilwell S | | Oil & Gas Operator | Jul 1986 |
| 1545 | Farrar Pump & Su | | Oil & Gas Operator | Dec 1996 |
| 1546 | Farrar Pump & Supply Co., Inc. | Medicine Lodge, KS 67104 | Oil & Gas Operator | Jun 2009 |
| 1547 | Farris Oil, Inc. | Sedan, KS 67361 | Oil Operator | Aug 2025 |
| 1548 | Farris Well Service | | Oil & Gas Operator | Dec 2021 |
| 1549 | Farthing Don Oil | | Oil & Gas Operator | Jun 1994 |
| 1550 | Fastrak Energy, LLC | Cherryvale, KS 67335 | Oil & Gas Operator | Sep 2025 |
| 1551 | Faulconer, Vernon E., Inc. | Tyler, TX 75711 | Oil & Gas Operator | Dec 2025 |
| 1552 | Fe Co. | Derby, KS 67037 | Oil & Gas Operator | Dec 2009 |
| 1553 | Fell Oil & Gas C | | Oil Operator | Oct 1991 |
| 1554 | Fender, Mildred A. | Russell, KS 67665 | Oil & Gas Operator | Jun 2000 |
| 1555 | Ferguson Orval L | | Oil & Gas Operator | Oct 1983 |
| 1556 | Ferris, Wakyn W. | Denver, CO 80202 | Oil Operator | Jun 1988 |
| 1557 | Fewins, Gary D. | Moran, KS 66755 | Oil Operator | Jul 2019 |
| 1558 | Fidelity Energy, Inc. | Houston, TX 77055 | Oil & Gas Operator | Dec 2009 |
| 1559 | Fina Oil & Chemi | | Oil & Gas Operator | Oct 1995 |
| 1560 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 1561 | Finley Oil Compa | | Oil Operator | Oct 1992 |
| 1562 | Finney Drilling Company | Wann, OK 74083-2314 | Oil Operator | Jul 2018 |
| 1563 | Finney Oil Company | | Oil & Gas Operator | Sep 2025 |
| 1564 | First Energy Cor | | Oil Operator | Aug 1990 |
| 1565 | First Energy Corporation | | Oil & Gas Operator | Jun 1993 |
| 1566 | First National O | | Oil & Gas Operator | Aug 1990 |
| 1567 | First National Oil Inc | Edmond, OK 73003 | Oil & Gas Operator | Nov 2025 |
| 1568 | Five Star Energy, Inc. | Seguin, TX 78155 | Oil & Gas Operator | Nov 2025 |
| 1569 | Flatirons Resources LLC | Westminster, CO 80021 | Oil & Gas Operator | Dec 2022 |
| 1570 | Flatland Energy, LLC | Gardner, KS 66030 | Oil Operator | Sep 2025 |
| 1571 | Flatland Oil Com | | Oil Operator | Sep 1985 |
| 1572 | Flatlander Energy LLC | Blackwell, OK 74631 | Oil & Gas Operator | Nov 2025 |
| 1573 | Flatlander Petroleum LLC | | Oil & Gas Operator | Sep 2025 |
| 1574 | Flint Hills Prod | | Gas Operator | Mar 1989 |
| 1575 | Flint Hills Production Co., Inc. | Gas City, KS 66742 | Oil Operator | Nov 2009 |
| 1576 | Flintstone Energy, LLC | El Dorado, KS 67042 | Oil Operator | Jun 2020 |
| 1577 | Florine, Inc. | Gypsum, KS 67448 | Oil Operator | Sep 2025 |
| 1578 | Flowers Prod Com | | Oil Operator | Aug 1994 |
| 1579 | Flowers Production Co., Inc. | El Dorado, KS 67042 | Oil Operator | Jul 2009 |
| 1580 | Flowers Well Ser | | Oil Operator | Feb 1991 |
| 1581 | Flynn Energy Cor | | Oil & Gas Operator | Mar 1992 |
| 1582 | Fna Oil Company, LLC | Richfield, KS 67953 | Gas Operator | Sep 2025 |
| 1583 | Folk Oil | | Oil Operator | Dec 2009 |
| 1584 | Forbes Harold G | | Oil Operator | Dec 1984 |
| 1585 | Forbes, Patrick T. | Eureka, KS 67045 | Oil Operator | Sep 2025 |
| 1586 | Foreman Enterprises Inc | Edmond, OK 73003 | Oil & Gas Operator | Oct 2025 |
| 1587 | Forestar Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2017 |
| 1588 | Formation Mechan | | Oil Operator | Dec 1986 |
| 1589 | Fort Scott Methane Partners, LCC | Denver, CO 80218 | Gas Operator | Dec 2014 |
| 1590 | Fossil Creek Energy, LLC | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 1591 | Fossil Energy, LLC | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 1592 | Fossil Resources LLC | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 1593 | Foster Gas Corporation | Brownwood, TX 76801 | Oil & Gas Operator | Jan 2009 |
| 1594 | Foster Oil & Gas | Bartlesville, OK 74005 | Oil & Gas Operator | Mar 2014 |
| 1595 | Foster Oil LLC | | Oil Operator | Sep 2025 |
| 1596 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Feb 2026 |
| 1597 | Four Corners Oil, LLC | Cape Fair, MO 65624 | Oil Operator | Sep 2025 |
| 1598 | Four Star Oil & Gas Company | Houston, TX 77252 | Oil & Gas Operator | Dec 2025 |
| 1599 | Four Star Oil - | | Oil Operator | Dec 1987 |
| 1600 | Four States Petr | | Oil & Gas Operator | Nov 1990 |