| 15501 | K & K Oil Co. | Corsicana, TX 75109 | Oil & Gas Operator | Feb 2026 |
| 15502 | K & K Operating Co. | Rule, TX 79547 | Oil Operator | Dec 2005 |
| 15503 | K & L Gas & Oil | Homer City, PA 15748-6033 | Gas Operator | Dec 2007 |
| 15504 | K & L Gas & Oil Inc | Homer City, PA 15748-6033 | Oil & Gas Operator | Dec 2018 |
| 15505 | K & L Oil Compan | | Oil Operator | Dec 1993 |
| 15506 | K & L Oil, LLC | Gonzales, TX 78629 | Oil Operator | Feb 2026 |
| 15507 | K & L Operating LLC | Cushing, OK 74023-6189 | Oil & Gas Operator | Oct 2025 |
| 15508 | K & L Tank Truck | | Oil Operator | Aug 1987 |
| 15509 | K & L Tank Truck Service, Inc. | Garden City, KS 67846 | Oil Operator | Apr 2023 |
| 15510 | K & M Exploration, 1973-3 LTD. | Abilene, TX 79608 | Oil & Gas Operator | Nov 1997 |
| 15511 | K & M Oil Company LLC | Hennessey, OK 73742 | Oil & Gas Operator | Nov 2025 |
| 15512 | K & N Petroleum, Inc. | Great Bend, KS 67530 | Oil Operator | Sep 2025 |
| 15513 | K & R Oil & Gas | Roswell, NM 88201 | Oil Operator | Jul 1995 |
| 15514 | K & S Oil & Gas Company, LLC | Kerrville, TX 78028 | Oil & Gas Operator | Feb 2026 |
| 15515 | K & S Rentals | | Oil & Gas Operator | May 2013 |
| 15516 | K & W Oil Company | MT Carmel, IL 62830 | Oil & Gas Operator | May 2013 |
| 15517 | K & W Vanpelt Company | Portage, OH 43451 | Oil & Gas Operator | Feb 2026 |
| 15518 | K A Brown Oil & Gas LLC | Sardis, OH 43946 | Oil & Gas Operator | Dec 2024 |
| 15519 | K A Ware Production Co., LLC | Pratt, KS 67124 | Oil Operator | Feb 2026 |
| 15520 | K And R Oil Company | Stanton, TX 79782 | Oil & Gas Operator | Aug 2003 |
| 15521 | K And R Operating | Kingsbury, TX 78638 | Oil & Gas Operator | Feb 2026 |
| 15522 | K C Crude Inc | Lenexa, KS 66215 | Oil & Gas Operator | Dec 2000 |
| 15523 | K C Crude Incorp | | Oil & Gas Operator | Mar 1994 |
| 15524 | K C Development | | Oil & Gas Operator | Dec 1996 |
| 15525 | K C Resources In | | Oil & Gas Operator | Oct 1993 |
| 15526 | K C S Michigan Resources Inc | | Oil & Gas Operator | Mar 2004 |
| 15527 | K Cubed Resources, L.L.C. | Burleson, TX 76028 | Oil & Gas Operator | Feb 2026 |
| 15528 | K D S Resources Co | Thomas, OK 73669 | Oil & Gas Operator | Oct 2025 |
| 15529 | K Energy Inc | Mannford, OK 74044-3023 | Oil & Gas Operator | May 2013 |
| 15530 | K Explorations | | Gas Operator | May 1984 |
| 15531 | K G Operating | Hennessey, OK 73742 | Oil & Gas Operator | May 1999 |
| 15532 | K L Production Services LLC | Duncan, OK 73533-3409 | Oil & Gas Operator | Nov 2019 |
| 15533 | K M X Corporation Inc. | Pampa, TX 79066 | Oil & Gas Operator | Dec 2001 |
| 15534 | K Me Company, LLC | Kilgore, TX 75663 | Oil Operator | Feb 2026 |
| 15535 | K N Energy Inc | Lakewood, CO 80228 | Oil & Gas Operator | Nov 2000 |
| 15536 | K N Processing | | Gas Operator | Mar 1999 |
| 15537 | K O G Production LLC | Freedom, OK 73842 | Oil & Gas Operator | Nov 2025 |
| 15538 | K Oil Company | Houston, TX 77005 | Oil & Gas Operator | Feb 2026 |
| 15539 | K P Kauffman Company Inc | Denver, CO 80203 | Oil & Gas Operator | Nov 2025 |
| 15540 | K Phil Fleetwood Oil Properties LLC | Marlow, OK 73055 | Oil & Gas Operator | Nov 2025 |
| 15541 | K R M Petroleum | | Oil & Gas Operator | Jan 1990 |
| 15542 | K R S Expl., Inc. | | Oil Operator | Oct 2020 |
| 15543 | K R Well Technology, LLC | Dimmitt, TX 79027 | Oil Operator | Feb 2026 |
| 15544 | K S & S Oil Company Inc | Terral, TX 73569-5056 | Oil Operator | Oct 2025 |
| 15545 | K S Oil Company Inc | Norman, OK 73072-7480 | Oil & Gas Operator | Nov 2025 |
| 15546 | K Spencer LLC | Drumright, OK 74030-5825 | Oil & Gas Operator | Sep 2019 |
| 15547 | K W Drilling, Inc. | Topeka, KS 66617 | Gas Operator | Sep 1991 |
| 15548 | K W Oil Well Service. Inc. | Chanute, KS 66720 | Oil Operator | Apr 2017 |
| 15549 | K Wilson Enterprises Inc. | | Oil Operator | Jan 2025 |
| 15550 | K&C Pump Truck, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2018 |
| 15551 | K&M LLC | | Oil Operator | Aug 2025 |
| 15552 | K&M Resources LLC | Artesia, NM 88211 | Oil & Gas Operator | Nov 2025 |
| 15553 | K-3 Energy Corpo | | Oil Operator | May 1988 |
| 15554 | K-B Exploration Co. | Houston, TX 77057 | Oil & Gas Operator | Feb 2026 |
| 15555 | K-B Oil Company | Dallas, TX 75243 | Oil & Gas Operator | Dec 2020 |
| 15556 | K-B Oil Company, LLC | Dallas, TX 75243 | Oil & Gas Operator | Feb 2026 |
| 15557 | K-Bar Oil LLC | McPherson, KS 67460 | Oil Operator | Sep 2025 |
| 15558 | K-C Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Jan 2013 |
| 15559 | K-D Operations | N Richlnd HLS, TX 76182 | Oil Operator | Feb 2026 |
| 15560 | K-M Oil Company, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Feb 2026 |
| 15561 | K-Tel Petroleum | Englewood, CO 80111-4628 | Oil & Gas Operator | Sep 2007 |
| 15562 | K-Von Enterprises Inc | Tecumseh, OK 74873 | Oil & Gas Operator | Jan 1994 |
| 15563 | K-W Oil - Evans | | Oil Operator | Jan 1994 |
| 15564 | K. D. Lankford, Jr & L&N DRLG Co | | Gas Operator | Dec 2010 |
| 15565 | K. D. Lankford, Jr., Et Al | | Gas Operator | Dec 2010 |
| 15566 | K. D. Operating LLC. | Wichita Falls, TX 76308 | Oil Operator | Feb 2026 |
| 15567 | K. F. Operating Company | Burkburnett, TX 76354 | Oil & Gas Operator | Mar 2008 |
| 15568 | K. G. H. Enterprises | | Oil Operator | Dec 2003 |
| 15569 | K. J. Enterprises LLC | | Oil Operator | Dec 2001 |
| 15570 | K. O. C. Corporation | Sherman, TX 75091 | Oil & Gas Operator | Feb 2026 |
| 15571 | K. Petroleum, Inc. | Gahanna, OH 43230 | Oil & Gas Operator | Nov 2025 |
| 15572 | K. Stewart Petroleum Corporation | Oklahoma City, OK 73103 | Oil & Gas Operator | Jun 2001 |
| 15573 | K.A. Barnes Oil & Gas Oper, LLC | Somerset, TX 78069 | Oil Operator | Feb 2026 |
| 15574 | K.B. Oil & Gas | | Oil & Gas Operator | Oct 2025 |
| 15575 | K.C. Development, Inc. | Marion, KS 66861 | Oil Operator | Mar 2009 |
| 15576 | K.C. Energy | Kansas City, MO 64111 | Oil Operator | Apr 1986 |
| 15577 | K.C. Operations | | Oil Operator | Aug 2025 |
| 15578 | K.E. Snyder Co., LLC | Hamilton, KS 66853 | Oil Operator | Sep 2025 |
| 15579 | K.J.S. Oil | | Oil & Gas Operator | Sep 2025 |
| 15580 | K.M.A. Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 15581 | K.W.A., Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 15582 | K.W.S. Oil Development | Chanute, KS 66720 | Oil Operator | May 2004 |
| 15583 | K2 America Corporation | Calgary, AB T3P 3S8 | Oil & Gas Operator | Nov 2017 |
| 15584 | K2 Petroleum, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | Feb 2026 |
| 15585 | K3 Oil & Gas Operating Company | Spring, TX 77383 | Oil & Gas Operator | Oct 2025 |
| 15586 | K3 Productions LLC | Houston, TX 77269 | Oil & Gas Operator | Feb 2026 |
| 15587 | Ka Energy Op Co. LLC | Oakland, CA 94605 | Oil & Gas Operator | Oct 2021 |
| 15588 | Ka Tex Energies, Inc. | Iola, TX 77861 | Oil & Gas Operator | May 1999 |
| 15589 | Ka-Lyn Oil & Gas, Inc. | | Oil & Gas Operator | Jul 1990 |
| 15590 | Kabco Oil & Gas Company | Longview, TX 75604 | Oil & Gas Operator | Jun 2018 |
| 15591 | Kabco Production | | Oil & Gas Operator | Sep 1999 |
| 15592 | Kabco-Pennington | | Oil & Gas Operator | Oct 1996 |
| 15593 | Kachina Exploration Inc | Cheyenne, WY 82003 | Oil & Gas Operator | Jul 2000 |
| 15594 | Kachina Oil & Gas Inc. | Austin, TX 78766 | Oil & Gas Operator | Jul 2002 |
| 15595 | Kachina Oil Comp | | Oil & Gas Operator | Jan 1988 |
| 15596 | Kachina Oil Company | Wichita, KS 67202 | Gas Operator | Sep 1998 |
| 15597 | Kadane & Sons | | Oil & Gas Operator | Sep 2000 |
| 15598 | Kadane Corporation | Dallas, TX 75205 | Oil & Gas Operator | Feb 2026 |
| 15599 | Kadane Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 1998 |
| 15600 | Kahan & Assoc In | | Oil Operator | Dec 1996 |