| 1501 | Flatlander Energy LLC | Blackwell, OK 74631 | Oil & Gas Operator | Jun 2026 |
| 1502 | Flatlander Petroleum LLC | | Oil & Gas Operator | May 2026 |
| 1503 | Flint Hills Production Co., Inc. | Gas City, KS 66742 | Oil Operator | Nov 2009 |
| 1504 | Flintstone Energy, LLC | El Dorado, KS 67042 | Oil Operator | Jun 2020 |
| 1505 | Florine, Inc. | Gypsum, KS 67448 | Oil Operator | Mar 2026 |
| 1506 | Flowers Prod Com | | Oil Operator | Aug 1994 |
| 1507 | Flowers Production Co., Inc. | El Dorado, KS 67042 | Oil Operator | Jul 2009 |
| 1508 | Flowers Well Ser | | Oil Operator | Feb 1991 |
| 1509 | Flynn Energy Cor | | Oil & Gas Operator | Mar 1992 |
| 1510 | Fna Oil Company, LLC | Richfield, KS 67953 | Gas Operator | May 2026 |
| 1511 | Folk Oil | | Oil Operator | Dec 2009 |
| 1512 | Forbes Harold G | | Oil Operator | Dec 1984 |
| 1513 | Forbes, Patrick T. | Eureka, KS 67045 | Oil Operator | May 2026 |
| 1514 | Foreman Enterprises Inc | Edmond, OK 73003 | Oil & Gas Operator | Oct 2025 |
| 1515 | Forestar Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2017 |
| 1516 | Formation Mechan | | Oil Operator | Dec 1986 |
| 1517 | Fossil Creek Energy, LLC | Russell, KS 67665 | Oil Operator | May 2026 |
| 1518 | Fossil Energy, LLC | Russell, KS 67665 | Oil Operator | May 2026 |
| 1519 | Fossil Resources LLC | Hays, KS 67601 | Oil Operator | May 2026 |
| 1520 | Foster Gas Corporation | Brownwood, TX 76801 | Oil & Gas Operator | Jan 2009 |
| 1521 | Foster Oil & Gas | Bartlesville, OK 74005 | Oil & Gas Operator | Mar 2014 |
| 1522 | Foster Oil LLC | | Oil Operator | May 2026 |
| 1523 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Sep 2026 |
| 1524 | Four Corners Oil, LLC | Cape Fair, MO 65624 | Oil Operator | Mar 2026 |
| 1525 | Four Star Oil & Gas Company | Houston, TX 77252 | Oil & Gas Operator | Jun 2026 |
| 1526 | Four Star Oil - | | Oil Operator | Dec 1987 |
| 1527 | Four States Petr | | Oil & Gas Operator | Nov 1990 |
| 1528 | Four-J Oil Ops | Osawatomie, KS 66064 | Oil Operator | Mar 1998 |
| 1529 | Four-Way Oper In | | Oil Operator | Aug 1994 |
| 1530 | Four-Way Operating, Inc. | Great Bend, KS 67530 | Oil Operator | Sep 2013 |
| 1531 | Fourth Quarter Program | Boulder, CO 80306 | Oil Operator | Feb 2006 |
| 1532 | Fourwinds Oil Corporation | Hays, KS 67601 | Oil Operator | May 2026 |
| 1533 | Fox, Don | Chase, KS 67524 | Oil & Gas Operator | Jul 2006 |
| 1534 | Fox, Warren F. Family Trust | Plains, KS 67869 | Oil Operator | Jun 2016 |
| 1535 | Foxfire Expl. | | Oil Operator | Jun 1997 |
| 1536 | Foxfire Explorat | | Oil Operator | Dec 1986 |
| 1537 | Fpco Oil & Gas Co. | New Orleans, LA 70160 | Oil & Gas Operator | May 2026 |
| 1538 | Franklin Calvin | | Oil Operator | Aug 1995 |
| 1539 | Free State Petroleum | Hays, KS 67601 | Oil Operator | Jul 2021 |
| 1540 | Fremont Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2004 |
| 1541 | Fremont Exploration, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Nov 2014 |
| 1542 | French & Winters | | Oil Operator | Feb 1994 |
| 1543 | French R E Oil C | | Oil Operator | Feb 1994 |
| 1544 | Fritzler Resources Inc | Fort Morgan, CO 80701 | Oil & Gas Operator | May 2026 |
| 1545 | Fritzler Trucking, Inc. | Ness City, KS 67560 | Oil Operator | Sep 2007 |
| 1546 | Froelich Oil | | Oil Operator | Apr 2010 |
| 1547 | Frontier Land Company, Inc. | Leawood, KS 66206 | Oil Operator | Sep 2008 |
| 1548 | Frontier Oil Com | | Oil & Gas Operator | May 1995 |
| 1549 | Frontier Oil Company | | Oil Operator | Oct 1999 |
| 1550 | Fuller Oil | Iola, KS 66749 | Oil Operator | Jun 2001 |
| 1551 | Funk Oil & Operating, LLC | Russell, KS 67665 | Oil Operator | Jul 2024 |
| 1552 | Further Developm | | Oil Operator | Apr 1986 |
| 1553 | Future Energy Li | | Oil Operator | Nov 1991 |
| 1554 | Fyler Oil, LLC | McPherson, KS 67460 | Oil Operator | Apr 2026 |
| 1555 | Fyler, M. A. | Rangley, CO 81648 | Oil Operator | Mar 1988 |
| 1556 | G & C Oil | | Oil Operator | May 2026 |
| 1557 | G & G Oil Compan | | Oil Operator | Sep 1993 |
| 1558 | G & G Resources Company Inc | Broken Arrow, OK 74013 | Oil & Gas Operator | May 2013 |
| 1559 | G & J Oil Company, Inc. | Caney, KS 67333 | Oil & Gas Operator | May 2026 |
| 1560 | G & J Petroleum, Inc. | McCracken, KS 67556 | Oil Operator | May 2026 |
| 1561 | G & L Oil Compan | | Oil Operator | Oct 1988 |
| 1562 | G & M Well Seriv | | Oil Operator | Nov 1995 |
| 1563 | G & N Well Service, A General Partnership | Thayer, KS 66776 | Gas Operator | May 2026 |
| 1564 | G & R Oil Co | St. John, KS 67576 | Oil Operator | Aug 2008 |
| 1565 | G & W Oil Prod - | | Oil Operator | Oct 1995 |
| 1566 | G And D Oil Company | Welda, KS 66091 | Oil Operator | Nov 1997 |
| 1567 | G And T Petroleum Consulting And Management | McCracken, KS 67556 | Oil Operator | Aug 2014 |
| 1568 | G L M Company | | Oil Operator | May 2026 |
| 1569 | G M Enterprises | Chanute, KS 66720 | Oil Operator | Jan 1987 |
| 1570 | G M Oil | McPherson, KS 67460 | Oil Operator | Aug 1997 |
| 1571 | G-D Oil Oper - D | | Oil Operator | Apr 1990 |
| 1572 | G-D Oil Operations | | Oil Operator | May 1997 |
| 1573 | G.A.B.S. Oil, A General Partnership | Ness City, KS 67560 | Oil Operator | Aug 2008 |
| 1574 | Gabel, Craig | Wichita, KS 67216 | Oil Operator | Jun 2025 |
| 1575 | Gable Oil Co. | Chase, KS 67524 | Oil Operator | Sep 1998 |
| 1576 | Gable Well Service, Inc. | Chase, KS 67524 | Oil Operator | Apr 1998 |
| 1577 | Gager, Sally | Hays, KS 67601 | Oil Operator | Feb 1998 |
| 1578 | Gaines, Franklin D. | Augusta, KS 67010 | Oil Operator | Sep 2001 |
| 1579 | Galemore Oil Co. | | Oil Operator | Feb 2026 |
| 1580 | Galemore Oil Com | | Oil Operator | May 1991 |
| 1581 | Galemore, John E. | Chanute, KS 66720 | Oil Operator | Sep 2001 |
| 1582 | Galloway Drillin | | Oil Operator | Dec 1996 |
| 1583 | Galloway Drilling Co., Inc. | Wichita, KS 67202 | Oil Operator | Nov 2009 |
| 1584 | Galloway Petrole | | Oil Operator | Jun 1993 |
| 1585 | Gamma Resources Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | Jan 2017 |
| 1586 | Garfield Oil Com | | Gas Operator | Jan 1984 |
| 1587 | Garo Investment Company | Tempe, AZ 85284 | Oil Operator | Aug 2020 |
| 1588 | Gary C. Splane | Chanute, KS 66720 | Oil Operator | Dec 2009 |
| 1589 | Gary-Williams Co (The) | Denver, CO 80202 | Oil Operator | Nov 2009 |
| 1590 | Gary-Williams Oi | | Oil & Gas Operator | Jun 1989 |
| 1591 | Gas Chasers Inc. | Claflin, KS 67525 | Gas Operator | Dec 2009 |
| 1592 | Gas Marketing, Inc. | Stafford, KS 67578 | Oil Operator | Mar 2007 |
| 1593 | Gas Producing En | | Oil & Gas Operator | Nov 1983 |
| 1594 | Gateway Resources USA Inc | Bartlesville, OK 74006 | Oil & Gas Operator | Jun 2026 |
| 1595 | Gateway Resources, LLC | Wichita, KS 67218 | Oil Operator | May 2026 |
| 1596 | Gator Oil Compan | | Oil Operator | May 1992 |
| 1597 | Gear Petroleum Co Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2009 |
| 1598 | Gee Oil Service LLC | Stafford, KS 67578 | Oil Operator | Feb 2013 |
| 1599 | Gee, Fred E. | Topeka, KS 66614 | Oil Operator | May 1998 |
| 1600 | Geist Oil Operations | | Oil Operator | May 2026 |