| 15601 | K R M Petroleum | | Oil & Gas Operator | Jan 1990 |
| 15602 | K R S Expl., Inc. | | Oil Operator | Oct 2020 |
| 15603 | K R Well Technology, LLC | Dimmitt, TX 79027 | Oil Operator | Apr 2025 |
| 15604 | K S & S Oil Company Inc | Terral, TX 73569-5056 | Oil Operator | Feb 2025 |
| 15605 | K S Oil Company Inc | Norman, OK 73072-7480 | Oil & Gas Operator | Feb 2025 |
| 15606 | K W B Oil Property MGMT Inc | | Oil & Gas Operator | Jun 2000 |
| 15607 | K W Drilling, Inc. | Topeka, KS 66617 | Gas Operator | Sep 1991 |
| 15608 | K W Oil Well Service. Inc. | Chanute, KS 66720 | Oil Operator | Apr 2017 |
| 15609 | K Wilson Enterprises Inc. | | Oil Operator | Jan 2025 |
| 15610 | K&C Pump Truck, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2018 |
| 15611 | K&M Resources LLC | Artesia, NM 88211 | Oil & Gas Operator | Feb 2025 |
| 15612 | K-3 Energy Corpo | | Oil Operator | May 1988 |
| 15613 | K-B Exploration Co. | Houston, TX 77057 | Oil & Gas Operator | Apr 2025 |
| 15614 | K-B Oil Company | Dallas, TX 75243 | Oil & Gas Operator | Dec 2020 |
| 15615 | K-B Oil Company, LLC | Dallas, TX 75243 | Oil & Gas Operator | Apr 2025 |
| 15616 | K-Bar Oil LLC | McPherson, KS 67460 | Oil Operator | Dec 2024 |
| 15617 | K-C Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Jan 2013 |
| 15618 | K-D Operations | N Richlnd HLS, TX 76182 | Oil Operator | Apr 2025 |
| 15619 | K-M Oil Company, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Apr 2025 |
| 15620 | K-Tel Petroleum | Englewood, CO 80111-4628 | Oil & Gas Operator | Sep 2007 |
| 15621 | K-Von Enterprises Inc | Tecumseh, OK 74873 | Oil & Gas Operator | Jan 1994 |
| 15622 | K-W Oil - Evans | | Oil Operator | Jan 1994 |
| 15623 | K. C. Crude, Inc. | Lenexa, KS 66215 | Oil & Gas Operator | Dec 2000 |
| 15624 | K. D. Lankford, Jr & L&N DRLG Co | | Gas Operator | Dec 2010 |
| 15625 | K. D. Lankford, Jr., Et Al | | Gas Operator | Dec 2010 |
| 15626 | K. D. Operating LLC. | Wichita Falls, TX 76308 | Oil Operator | Apr 2025 |
| 15627 | K. F. Operating Company | Burkburnett, TX 76354 | Oil & Gas Operator | Mar 2008 |
| 15628 | K. G. H. Enterprises | | Oil Operator | Dec 2003 |
| 15629 | K. J. Enterprises LLC | | Oil Operator | Dec 2001 |
| 15630 | K. O. C. Corporation | Sherman, TX 75091 | Oil & Gas Operator | Apr 2025 |
| 15631 | K. Petroleum, Inc. | Gahanna, OH 43230 | Oil & Gas Operator | Feb 2025 |
| 15632 | K. Stewart Petroleum Corporation | Oklahoma City, OK 73103 | Oil & Gas Operator | Jun 2001 |
| 15633 | K.A. Barnes Oil & Gas Oper, LLC | Somerset, TX 78069 | Oil Operator | Apr 2025 |
| 15634 | K.C. Development, Inc. | Marion, KS 66861 | Oil Operator | Mar 2009 |
| 15635 | K.C. Energy | Kansas City, MO 64111 | Oil Operator | Apr 1986 |
| 15636 | K.C. Operations | | Oil Operator | Nov 2024 |
| 15637 | K.E. Snyder Co., LLC | Hamilton, KS 66853 | Oil Operator | Dec 2024 |
| 15638 | K.J.S. Oil | | Oil & Gas Operator | Dec 2024 |
| 15639 | K.M.A. Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 15640 | K.W.A., Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 15641 | K.W.S. Oil Development | Chanute, KS 66720 | Oil Operator | May 2004 |
| 15642 | K2 America Corporation | Calgary, AB T3P 3S8 | Oil & Gas Operator | Nov 2017 |
| 15643 | K2 Petroleum, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | Apr 2025 |
| 15644 | K3 Oil & Gas Operating Company | Spring, TX 77383 | Oil & Gas Operator | Jan 2025 |
| 15645 | K3 Productions LLC | Houston, TX 77269 | Oil & Gas Operator | Apr 2025 |
| 15646 | Ka Energy Op Co. LLC | Oakland, CA 94605 | Oil & Gas Operator | Oct 2021 |
| 15647 | Ka Tex Energies, Inc. | Iola, TX 77861 | Oil & Gas Operator | May 1999 |
| 15648 | Ka-Lyn Oil & Gas, Inc. | | Oil & Gas Operator | Jul 1990 |
| 15649 | Kabco Oil & Gas Company | Longview, TX 75604 | Oil & Gas Operator | Jun 2018 |
| 15650 | Kabco Production | | Oil & Gas Operator | Sep 1999 |
| 15651 | Kabco-Pennington | | Oil & Gas Operator | Oct 1996 |
| 15652 | Kachina Exploration Inc | Cheyenne, WY 82003 | Oil & Gas Operator | Jul 2000 |
| 15653 | Kachina Oil & Gas Inc. | Austin, TX 78766 | Oil & Gas Operator | Jul 2002 |
| 15654 | Kachina Oil Comp | | Oil & Gas Operator | Jan 1988 |
| 15655 | Kachina Oil Company | Wichita, KS 67202 | Gas Operator | Sep 1998 |
| 15656 | Kadane & Sons | | Oil & Gas Operator | Sep 2000 |
| 15657 | Kadane Corporation | Dallas, TX 75205 | Oil & Gas Operator | Apr 2025 |
| 15658 | Kadane Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 1998 |
| 15659 | Kahan & Assoc In | | Oil Operator | Dec 1996 |
| 15660 | Kahan And Associates, Inc | Tulsa, OK 74170 | Oil & Gas Operator | Jan 2025 |
| 15661 | Kahan Louis | Tulsa, OK 74101 | Oil & Gas Operator | May 1994 |
| 15662 | Kahlenberg Oil And Gas LLC | Conroe, TX 77304 | Oil Operator | Apr 2025 |
| 15663 | Kahn George Operating Co | Seminole, OK 74818 | Oil & Gas Operator | Nov 2000 |
| 15664 | Kaico Petroleum, L.L.C. | Argyle, TX 76226 | Oil Operator | Oct 2018 |
| 15665 | Kain Petroleum Company | Pearsall, TX 78061 | Gas Operator | May 2011 |
| 15666 | Kain Petroleum, LLC | Pearsall, TX 78061 | Oil & Gas Operator | Apr 2025 |
| 15667 | Kainz, David R. | Ottawa, KS 66067 | Oil Operator | Aug 2009 |
| 15668 | Kaiser Aluminum Exploration Co | | Oil & Gas Operator | Dec 1986 |
| 15669 | Kaiser Energy Inc | Denver, CO 80202 | Oil & Gas Operator | Dec 1990 |
| 15670 | Kaiser Farms | Edmond, OK 73025-9489 | Oil & Gas Operator | Jan 2025 |
| 15671 | Kaiser Investments | Sand Springs, OK 74063 | Oil & Gas Operator | Sep 2003 |
| 15672 | Kaiser Oil (U.S.) LTD. | | Oil & Gas Operator | Apr 1983 |
| 15673 | Kaiser Operating, LLC | | Oil & Gas Operator | Jan 2025 |
| 15674 | Kaiser-Francis O | | Oil & Gas Operator | Oct 1995 |
| 15675 | Kaiser-Francis Oil | | Oil Operator | Nov 1995 |
| 15676 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Apr 2025 |
| 15677 | Kal Energy Inc | Oklahoma City, OK 73116-3606 | Oil Operator | Nov 2014 |
| 15678 | Kal Oil Operations | | Oil Operator | Dec 2024 |
| 15679 | Kala Oil Company | Sundown, TX 79372 | Oil & Gas Operator | Apr 2025 |
| 15680 | Kalda Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 1994 |
| 15681 | Kaler Energy Corp. | Boerne, TX 78006 | Oil & Gas Operator | Apr 2025 |
| 15682 | Kaler Oil Company | Gainesville, TX 76240 | Oil & Gas Operator | Dec 2023 |
| 15683 | Kalkaska Oilfield Services Inc | | Oil Operator | Aug 2006 |
| 15684 | Kalkman Oil Corporation | Duncan, OK 73533 | Oil & Gas Operator | Jan 2025 |
| 15685 | Kallina, Carlton J. | Houston, TX 77269 | Gas Operator | Apr 2025 |
| 15686 | Kalos Corporation | Tyler, TX 75701 | Oil & Gas Operator | Apr 2025 |
| 15687 | Kalstra Energy LTD | Denver, CO 80222-5938 | Gas Operator | Jun 2018 |
| 15688 | Kamc Oil & Gas LLC | Queen Creek, AZ 85142 | Oil Operator | Jan 2011 |
| 15689 | Kamco Hot Oil Service Inc | Cement, OK 73017 | Oil & Gas Operator | Feb 2025 |
| 15690 | Kamco Limited | Salt Lake City, UT 84105 | Oil Operator | Sep 2016 |
| 15691 | Kamlok Oil & Gas, Inc. | Houston, TX 77240 | Oil & Gas Operator | Jun 1996 |
| 15692 | Kamlok, Inc. | | Oil Operator | Nov 1991 |
| 15693 | Kammer, Walter A. | Holland, NY 14080 | Gas Operator | Dec 2023 |
| 15694 | Kampresco Energy, LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 15695 | Kan-Cal Enterpri | | Oil Operator | Dec 1988 |
| 15696 | Kan-Tex Drilling Corp. | | Oil Operator | Dec 1981 |
| 15697 | Kan-Texco Incorp | | Oil & Gas Operator | Dec 1994 |
| 15698 | Kana Resources, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Aug 2003 |
| 15699 | Kanaco Oil Company | | Oil Operator | Dec 2019 |
| 15700 | Kanalta Resources, LTD. | Yates Center, KS 66783 | Oil Operator | Jan 1998 |