| 1501 | Fancher, Geo. H, Jr. | Denver, CO 80202 | Gas Operator | Mar 1996 |
| 1502 | Fanshier, Roger | Seward, KS 67576 | Oil Operator | Oct 2008 |
| 1503 | Farmer Dog Oil Co., A General Partnership | Humboldt, KS 66748 | Oil Operator | Jun 2025 |
| 1504 | Farmer John O Inc | Russell, KS 67665 | Oil & Gas Operator | Jun 2025 |
| 1505 | Farrar Oilwell S | | Oil & Gas Operator | Jul 1986 |
| 1506 | Farrar Pump & Su | | Oil & Gas Operator | Dec 1996 |
| 1507 | Farrar Pump & Supply Co., Inc. | Medicine Lodge, KS 67104 | Oil & Gas Operator | Jun 2009 |
| 1508 | Farris Oil, Inc. | Sedan, KS 67361 | Oil Operator | Apr 2025 |
| 1509 | Farris Well Service | | Oil & Gas Operator | Dec 2021 |
| 1510 | Farthing Don Oil | | Oil & Gas Operator | Jun 1994 |
| 1511 | Fastrak Energy, LLC | Cherryvale, KS 67335 | Oil & Gas Operator | Jun 2025 |
| 1512 | Faulconer, Vernon E., Inc. | Tyler, TX 75711 | Oil & Gas Operator | Sep 2025 |
| 1513 | Fe Co. | Derby, KS 67037 | Oil & Gas Operator | Dec 2009 |
| 1514 | Fell Oil & Gas C | | Oil Operator | Oct 1991 |
| 1515 | Fender, Mildred A. | Russell, KS 67665 | Oil & Gas Operator | Jun 2000 |
| 1516 | Ferguson Orval L | | Oil & Gas Operator | Oct 1983 |
| 1517 | Ferris, Wakyn W. | Denver, CO 80202 | Oil Operator | Jun 1988 |
| 1518 | Fewins, Gary D. | Moran, KS 66755 | Oil Operator | Jul 2019 |
| 1519 | Fidelity Energy, Inc. | Houston, TX 77055 | Oil & Gas Operator | Dec 2009 |
| 1520 | Fina Oil & Chemi | | Oil & Gas Operator | Oct 1995 |
| 1521 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 1522 | Finley Oil Compa | | Oil Operator | Oct 1992 |
| 1523 | Finney Drilling Company | Wann, OK 74083-2314 | Oil Operator | Jul 2018 |
| 1524 | Finney Oil Company | | Oil & Gas Operator | Jun 2025 |
| 1525 | First Energy Cor | | Oil Operator | Aug 1990 |
| 1526 | First Energy Corporation | | Oil & Gas Operator | Jun 1993 |
| 1527 | First National O | | Oil & Gas Operator | Aug 1990 |
| 1528 | First National Oil Inc | Edmond, OK 73003 | Oil & Gas Operator | Aug 2025 |
| 1529 | Five Star Energy, Inc. | Seguin, TX 78155 | Oil & Gas Operator | Jul 2025 |
| 1530 | Flatirons Resources LLC | Westminster, CO 80021 | Oil & Gas Operator | Dec 2022 |
| 1531 | Flatland Energy, LLC | Gardner, KS 66030 | Oil Operator | Jun 2025 |
| 1532 | Flatland Oil Com | | Oil Operator | Sep 1985 |
| 1533 | Flatlander Energy LLC | Blackwell, OK 74631 | Oil & Gas Operator | Aug 2025 |
| 1534 | Flatlander Petroleum LLC | | Oil & Gas Operator | Jun 2025 |
| 1535 | Flint Hills Production Co., Inc. | Gas City, KS 66742 | Oil Operator | Nov 2009 |
| 1536 | Flintstone Energy, LLC | El Dorado, KS 67042 | Oil Operator | Jun 2020 |
| 1537 | Florine, Inc. | Gypsum, KS 67448 | Oil Operator | Mar 2025 |
| 1538 | Flowers Prod Com | | Oil Operator | Aug 1994 |
| 1539 | Flowers Production Co., Inc. | El Dorado, KS 67042 | Oil Operator | Jul 2009 |
| 1540 | Flowers Well Ser | | Oil Operator | Feb 1991 |
| 1541 | Flynn Energy Cor | | Oil & Gas Operator | Mar 1992 |
| 1542 | Fna Oil Company, LLC | Richfield, KS 67953 | Gas Operator | Jun 2025 |
| 1543 | Folk Oil | | Oil Operator | Dec 2009 |
| 1544 | Forbes Harold G | | Oil Operator | Dec 1984 |
| 1545 | Forbes, Patrick T. | Eureka, KS 67045 | Oil Operator | Jun 2025 |
| 1546 | Foreman Enterprises Inc | Edmond, OK 73003 | Oil & Gas Operator | Sep 2025 |
| 1547 | Forestar Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2017 |
| 1548 | Formation Mechan | | Oil Operator | Dec 1986 |
| 1549 | Fort Scott Methane Partners, LCC | Denver, CO 80218 | Gas Operator | Dec 2014 |
| 1550 | Fossil Creek Energy, LLC | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 1551 | Fossil Energy, LLC | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 1552 | Fossil Resources LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 1553 | Foster Gas Corporation | Brownwood, TX 76801 | Oil & Gas Operator | Jan 2009 |
| 1554 | Foster Oil & Gas | Bartlesville, OK 74005 | Oil & Gas Operator | Mar 2014 |
| 1555 | Foster Oil LLC | | Oil Operator | Jun 2025 |
| 1556 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Dec 2025 |
| 1557 | Four Corners Oil, LLC | Cape Fair, MO 65624 | Oil Operator | Mar 2025 |
| 1558 | Four Star Oil & Gas Company | Houston, TX 77252 | Oil & Gas Operator | Sep 2025 |
| 1559 | Four Star Oil - | | Oil Operator | Dec 1987 |
| 1560 | Four States Petr | | Oil & Gas Operator | Nov 1990 |
| 1561 | Four-J Oil Ops | Osawatomie, KS 66064 | Oil Operator | Mar 1998 |
| 1562 | Four-Way Oper In | | Oil Operator | Aug 1994 |
| 1563 | Four-Way Operating, Inc. | Great Bend, KS 67530 | Oil Operator | Sep 2013 |
| 1564 | Fourth Quarter Program | Boulder, CO 80306 | Oil Operator | Feb 2006 |
| 1565 | Fourwinds Oil Corporation | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 1566 | Fox, Don | Chase, KS 67524 | Oil & Gas Operator | Jul 2006 |
| 1567 | Fox, Warren F. Family Trust | Plains, KS 67869 | Oil Operator | Jun 2016 |
| 1568 | Foxfire Expl. | | Oil Operator | Jun 1997 |
| 1569 | Foxfire Explorat | | Oil Operator | Dec 1986 |
| 1570 | Fpco Oil & Gas Co. | New Orleans, LA 70160 | Oil & Gas Operator | Jun 2025 |
| 1571 | Franklin Calvin | | Oil Operator | Aug 1995 |
| 1572 | Free State Petroleum | Hays, KS 67601 | Oil Operator | Jul 2021 |
| 1573 | Fremont Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2004 |
| 1574 | Fremont Exploration, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Nov 2014 |
| 1575 | French & Winters | | Oil Operator | Feb 1994 |
| 1576 | French R E Oil C | | Oil Operator | Feb 1994 |
| 1577 | Fritzler Resources Inc | Fort Morgan, CO 80701 | Oil & Gas Operator | Jun 2025 |
| 1578 | Fritzler Trucking, Inc. | Ness City, KS 67560 | Oil Operator | Sep 2007 |
| 1579 | Froelich Oil | | Oil Operator | Apr 2010 |
| 1580 | Frontier Land Company, Inc. | Leawood, KS 66206 | Oil Operator | Sep 2008 |
| 1581 | Frontier Oil Com | | Oil & Gas Operator | May 1995 |
| 1582 | Frontier Oil Company | | Oil Operator | Oct 1999 |
| 1583 | Fuller Oil | Iola, KS 66749 | Oil Operator | Jun 2001 |
| 1584 | Funk Oil & Operating, LLC | Russell, KS 67665 | Oil Operator | Jul 2024 |
| 1585 | Further Developm | | Oil Operator | Apr 1986 |
| 1586 | Future Energy Li | | Oil Operator | Nov 1991 |
| 1587 | Fyler Oil, LLC | McPherson, KS 67460 | Oil Operator | Jun 2025 |
| 1588 | Fyler, M. A. | Rangley, CO 81648 | Oil Operator | Mar 1988 |
| 1589 | G & C Oil | | Oil Operator | Jun 2025 |
| 1590 | G & G Oil Compan | | Oil Operator | Sep 1993 |
| 1591 | G & G Resources Company Inc | Broken Arrow, OK 74013 | Oil & Gas Operator | May 2013 |
| 1592 | G & J Oil Company, Inc. | Caney, KS 67333 | Oil & Gas Operator | Jun 2025 |
| 1593 | G & J Petroleum, Inc. | McCracken, KS 67556 | Oil Operator | Jun 2025 |
| 1594 | G & L Oil Compan | | Oil Operator | Oct 1988 |
| 1595 | G & M Well Seriv | | Oil Operator | Nov 1995 |
| 1596 | G & N Well Service, A General Partnership | Thayer, KS 66776 | Gas Operator | Feb 2025 |
| 1597 | G & R Oil Co | St. John, KS 67576 | Oil Operator | Aug 2008 |
| 1598 | G & W Oil Prod - | | Oil Operator | Oct 1995 |
| 1599 | G And D Oil Company | Welda, KS 66091 | Oil Operator | Nov 1997 |
| 1600 | G And T Petroleum Consulting And Management | McCracken, KS 67556 | Oil Operator | Aug 2014 |