| 15401 | K & M Oil Company LLC | Hennessey, OK 73742 | Oil & Gas Operator | Aug 2025 |
| 15402 | K & N Petroleum, Inc. | Great Bend, KS 67530 | Oil Operator | Jun 2025 |
| 15403 | K & R Oil & Gas | Roswell, NM 88201 | Oil Operator | Jul 1995 |
| 15404 | K & S Oil & Gas Company, LLC | Kerrville, TX 78028 | Oil & Gas Operator | Dec 2025 |
| 15405 | K & S Rentals | | Oil & Gas Operator | May 2013 |
| 15406 | K & W Oil Company | MT Carmel, IL 62830 | Oil & Gas Operator | May 2013 |
| 15407 | K & W Vanpelt Company | Portage, OH 43451 | Oil & Gas Operator | Dec 2025 |
| 15408 | K A Brown Oil & Gas LLC | Sardis, OH 43946 | Oil & Gas Operator | Dec 2024 |
| 15409 | K A Ware Production Co., LLC | Pratt, KS 67124 | Oil Operator | Dec 2025 |
| 15410 | K And R Oil Company | Stanton, TX 79782 | Oil & Gas Operator | Aug 2003 |
| 15411 | K And R Operating | Kingsbury, TX 78638 | Oil & Gas Operator | Dec 2025 |
| 15412 | K C Crude Inc | Lenexa, KS 66215 | Oil & Gas Operator | Dec 2000 |
| 15413 | K C Crude Incorp | | Oil & Gas Operator | Mar 1994 |
| 15414 | K C Development | | Oil & Gas Operator | Dec 1996 |
| 15415 | K C Resources In | | Oil & Gas Operator | Oct 1993 |
| 15416 | K C S Michigan Resources Inc | | Oil & Gas Operator | Mar 2004 |
| 15417 | K Cubed Resources, L.L.C. | Burleson, TX 76028 | Oil & Gas Operator | Dec 2025 |
| 15418 | K D S Resources Co | Thomas, OK 73669 | Oil & Gas Operator | Aug 2025 |
| 15419 | K Energy Inc | Mannford, OK 74044-3023 | Oil & Gas Operator | May 2013 |
| 15420 | K Explorations | | Gas Operator | May 1984 |
| 15421 | K G Operating | Hennessey, OK 73742 | Oil & Gas Operator | May 1999 |
| 15422 | K L Production Services LLC | Duncan, OK 73533-3409 | Oil & Gas Operator | Nov 2019 |
| 15423 | K M X Corporation Inc. | Pampa, TX 79066 | Oil & Gas Operator | Dec 2001 |
| 15424 | K Me Company, LLC | Kilgore, TX 75663 | Oil Operator | Dec 2025 |
| 15425 | K N Energy Inc | Lakewood, CO 80228 | Oil & Gas Operator | Nov 2000 |
| 15426 | K N Processing | | Gas Operator | Mar 1999 |
| 15427 | K O G Production LLC | Freedom, OK 73842 | Oil & Gas Operator | Sep 2025 |
| 15428 | K Oil Company | Houston, TX 77005 | Oil & Gas Operator | Dec 2025 |
| 15429 | K P Kauffman Company Inc | Denver, CO 80203 | Oil & Gas Operator | Sep 2025 |
| 15430 | K Phil Fleetwood Oil Properties LLC | Marlow, OK 73055 | Oil & Gas Operator | Sep 2025 |
| 15431 | K R M Petroleum | | Oil & Gas Operator | Jan 1990 |
| 15432 | K R S Expl., Inc. | | Oil Operator | Oct 2020 |
| 15433 | K R Well Technology, LLC | Dimmitt, TX 79027 | Oil Operator | Dec 2025 |
| 15434 | K S & S Oil Company Inc | Terral, TX 73569-5056 | Oil Operator | Aug 2025 |
| 15435 | K S Oil Company Inc | Norman, OK 73072-7480 | Oil & Gas Operator | Sep 2025 |
| 15436 | K Spencer LLC | Drumright, OK 74030-5825 | Oil & Gas Operator | Sep 2019 |
| 15437 | K W Drilling, Inc. | Topeka, KS 66617 | Gas Operator | Sep 1991 |
| 15438 | K W Oil Well Service. Inc. | Chanute, KS 66720 | Oil Operator | Apr 2017 |
| 15439 | K Wilson Enterprises Inc. | | Oil Operator | Jan 2025 |
| 15440 | K&C Pump Truck, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2018 |
| 15441 | K&M Resources LLC | Artesia, NM 88211 | Oil & Gas Operator | Sep 2025 |
| 15442 | K-3 Energy Corpo | | Oil Operator | May 1988 |
| 15443 | K-B Exploration Co. | Houston, TX 77057 | Oil & Gas Operator | Dec 2025 |
| 15444 | K-B Oil Company | Dallas, TX 75243 | Oil & Gas Operator | Dec 2020 |
| 15445 | K-B Oil Company, LLC | Dallas, TX 75243 | Oil & Gas Operator | Dec 2025 |
| 15446 | K-Bar Oil LLC | McPherson, KS 67460 | Oil Operator | Jun 2025 |
| 15447 | K-C Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Jan 2013 |
| 15448 | K-D Operations | N Richlnd HLS, TX 76182 | Oil Operator | Dec 2025 |
| 15449 | K-M Oil Company, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Dec 2025 |
| 15450 | K-Tel Petroleum | Englewood, CO 80111-4628 | Oil & Gas Operator | Sep 2007 |
| 15451 | K-Von Enterprises Inc | Tecumseh, OK 74873 | Oil & Gas Operator | Jan 1994 |
| 15452 | K-W Oil - Evans | | Oil Operator | Jan 1994 |
| 15453 | K. D. Lankford, Jr & L&N DRLG Co | | Gas Operator | Dec 2010 |
| 15454 | K. D. Lankford, Jr., Et Al | | Gas Operator | Dec 2010 |
| 15455 | K. D. Operating LLC. | Wichita Falls, TX 76308 | Oil Operator | Dec 2025 |
| 15456 | K. F. Operating Company | Burkburnett, TX 76354 | Oil & Gas Operator | Mar 2008 |
| 15457 | K. G. H. Enterprises | | Oil Operator | Dec 2003 |
| 15458 | K. J. Enterprises LLC | | Oil Operator | Dec 2001 |
| 15459 | K. O. C. Corporation | Sherman, TX 75091 | Oil & Gas Operator | Dec 2025 |
| 15460 | K. Petroleum, Inc. | Gahanna, OH 43230 | Oil & Gas Operator | Sep 2025 |
| 15461 | K. Stewart Petroleum Corporation | Oklahoma City, OK 73103 | Oil & Gas Operator | Jun 2001 |
| 15462 | K.A. Barnes Oil & Gas Oper, LLC | Somerset, TX 78069 | Oil Operator | Dec 2025 |
| 15463 | K.B. Oil & Gas | | Oil & Gas Operator | Sep 2025 |
| 15464 | K.C. Development, Inc. | Marion, KS 66861 | Oil Operator | Mar 2009 |
| 15465 | K.C. Energy | Kansas City, MO 64111 | Oil Operator | Apr 1986 |
| 15466 | K.C. Operations | | Oil Operator | Jun 2025 |
| 15467 | K.E. Snyder Co., LLC | Hamilton, KS 66853 | Oil Operator | Jun 2025 |
| 15468 | K.J.S. Oil | | Oil & Gas Operator | Jun 2025 |
| 15469 | K.M.A. Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 15470 | K.W.A., Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 15471 | K.W.S. Oil Development | Chanute, KS 66720 | Oil Operator | May 2004 |
| 15472 | K2 America Corporation | Calgary, AB T3P 3S8 | Oil & Gas Operator | Nov 2017 |
| 15473 | K2 Petroleum, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | Dec 2025 |
| 15474 | K3 Oil & Gas Operating Company | Spring, TX 77383 | Oil & Gas Operator | Aug 2025 |
| 15475 | K3 Productions LLC | Houston, TX 77269 | Oil & Gas Operator | Dec 2025 |
| 15476 | Ka Energy Op Co. LLC | Oakland, CA 94605 | Oil & Gas Operator | Oct 2021 |
| 15477 | Ka Tex Energies, Inc. | Iola, TX 77861 | Oil & Gas Operator | May 1999 |
| 15478 | Ka-Lyn Oil & Gas, Inc. | | Oil & Gas Operator | Jul 1990 |
| 15479 | Kabco Oil & Gas Company | Longview, TX 75604 | Oil & Gas Operator | Jun 2018 |
| 15480 | Kabco Production | | Oil & Gas Operator | Sep 1999 |
| 15481 | Kabco-Pennington | | Oil & Gas Operator | Oct 1996 |
| 15482 | Kachina Exploration Inc | Cheyenne, WY 82003 | Oil & Gas Operator | Jul 2000 |
| 15483 | Kachina Oil & Gas Inc. | Austin, TX 78766 | Oil & Gas Operator | Jul 2002 |
| 15484 | Kachina Oil Comp | | Oil & Gas Operator | Jan 1988 |
| 15485 | Kachina Oil Company | Wichita, KS 67202 | Gas Operator | Sep 1998 |
| 15486 | Kadane & Sons | | Oil & Gas Operator | Sep 2000 |
| 15487 | Kadane Corporation | Dallas, TX 75205 | Oil & Gas Operator | Dec 2025 |
| 15488 | Kadane Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 1998 |
| 15489 | Kahan & Assoc In | | Oil Operator | Dec 1996 |
| 15490 | Kahan & Associates Inc | Tulsa, OK 74170 | Oil & Gas Operator | Sep 2025 |
| 15491 | Kahan Louis | Tulsa, OK 74101 | Oil & Gas Operator | May 1994 |
| 15492 | Kahlenberg Oil And Gas LLC | Conroe, TX 77304 | Oil Operator | Dec 2025 |
| 15493 | Kahn George Operating Co | Seminole, OK 74818 | Oil & Gas Operator | Nov 2000 |
| 15494 | Kain Petroleum Company | Pearsall, TX 78061 | Gas Operator | May 2011 |
| 15495 | Kain Petroleum, LLC | Pearsall, TX 78061 | Oil & Gas Operator | Dec 2025 |
| 15496 | Kainz, David R. | Ottawa, KS 66067 | Oil Operator | Aug 2009 |
| 15497 | Kaiser Aluminum Exploration Co | | Oil & Gas Operator | Dec 1986 |
| 15498 | Kaiser Energy Inc | Denver, CO 80202 | Oil & Gas Operator | Dec 1990 |
| 15499 | Kaiser Farms | Edmond, OK 73025-9489 | Oil & Gas Operator | Aug 2025 |
| 15500 | Kaiser Investments | Sand Springs, OK 74063 | Oil & Gas Operator | Sep 2003 |