| 15001 | K & E Petroleum | | Oil & Gas Operator | Jan 1995 |
| 15002 | K & E Petroleum, Inc. | San Antonio, TX 78230 | Oil & Gas Operator | Apr 2012 |
| 15003 | K & F Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Dec 2021 |
| 15004 | K & G Oil Incorp | | Oil Operator | Mar 1988 |
| 15005 | K & G Production | | Oil Operator | Jan 2025 |
| 15006 | K & H Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 1995 |
| 15007 | K & J Downhole, LLC | Richmond, KY 40475 | Oil Operator | Dec 2024 |
| 15008 | K & J Oil Co. Inc. | | Oil & Gas Operator | Jun 2026 |
| 15009 | K & K Oil | Chase, KS 67524 | Oil & Gas Operator | Oct 2019 |
| 15010 | K & K Oil Co. | Corsicana, TX 75109 | Oil & Gas Operator | Aug 2026 |
| 15011 | K & K Operating Co. | Rule, TX 79547 | Oil Operator | Dec 2005 |
| 15012 | K & L Gas & Oil | Homer City, PA 15748-6033 | Gas Operator | Dec 2007 |
| 15013 | K & L Gas & Oil Inc | Homer City, PA 15748-6033 | Oil & Gas Operator | Dec 2018 |
| 15014 | K & L Oil Compan | | Oil Operator | Dec 1993 |
| 15015 | K & L Oil, LLC | Gonzales, TX 78629 | Oil Operator | Aug 2026 |
| 15016 | K & L Operating LLC | Cushing, OK 74023-6189 | Oil & Gas Operator | Apr 2026 |
| 15017 | K & L Tank Truck | | Oil Operator | Aug 1987 |
| 15018 | K & L Tank Truck Service, Inc. | Garden City, KS 67846 | Oil Operator | Apr 2023 |
| 15019 | K & M Exploration, 1973-3 LTD. | Abilene, TX 79608 | Oil & Gas Operator | Nov 1997 |
| 15020 | K & M Oil Company LLC | Hennessey, OK 73742 | Oil & Gas Operator | May 2026 |
| 15021 | K & N Petroleum, Inc. | Great Bend, KS 67530 | Oil Operator | Apr 2026 |
| 15022 | K & R Oil & Gas | Roswell, NM 88201 | Oil Operator | Jul 1995 |
| 15023 | K & S Oil & Gas Company, LLC | Shiner, TX 77984 | Oil & Gas Operator | Aug 2026 |
| 15024 | K & S Rentals | | Oil & Gas Operator | May 2013 |
| 15025 | K & W Oil Company | MT Carmel, IL 62830 | Oil & Gas Operator | May 2013 |
| 15026 | K & W Vanpelt Company | Portage, OH 43451 | Oil & Gas Operator | Aug 2026 |
| 15027 | K A Brown Oil & Gas LLC | Sardis, OH 43946 | Oil & Gas Operator | Dec 2025 |
| 15028 | K A Ware Production Co., LLC | Pratt, KS 67124 | Oil Operator | Aug 2026 |
| 15029 | K And R Oil Company | Stanton, TX 79782 | Oil & Gas Operator | Aug 2003 |
| 15030 | K And R Operating | Kingsbury, TX 78638 | Oil & Gas Operator | Aug 2026 |
| 15031 | K C Crude Inc | Lenexa, KS 66215 | Oil & Gas Operator | Dec 2000 |
| 15032 | K C Crude Incorp | | Oil & Gas Operator | Mar 1994 |
| 15033 | K C Development | | Oil & Gas Operator | Dec 1996 |
| 15034 | K C Resources In | | Oil & Gas Operator | Oct 1993 |
| 15035 | K C S Michigan Resources Inc | | Oil & Gas Operator | Mar 2004 |
| 15036 | K Cubed Resources, L.L.C. | Burleson, TX 76028 | Oil & Gas Operator | Aug 2026 |
| 15037 | K D S Resources Co | Thomas, OK 73669 | Oil & Gas Operator | Apr 2026 |
| 15038 | K Energy Inc | Mannford, OK 74044-3023 | Oil & Gas Operator | May 2013 |
| 15039 | K G Operating | Hennessey, OK 73742 | Oil & Gas Operator | May 1999 |
| 15040 | K L Production Services LLC | Duncan, OK 73533-3409 | Oil & Gas Operator | Nov 2019 |
| 15041 | K M X Corporation Inc. | Pampa, TX 79066 | Oil & Gas Operator | Dec 2001 |
| 15042 | K Me Company, LLC | Kilgore, TX 75663 | Oil Operator | Aug 2026 |
| 15043 | K N Energy Inc | Lakewood, CO 80228 | Oil & Gas Operator | Nov 2000 |
| 15044 | K N Processing | | Gas Operator | Mar 1999 |
| 15045 | K O G Production LLC | Freedom, OK 73842 | Oil & Gas Operator | May 2026 |
| 15046 | K Oil Company | Houston, TX 77005 | Oil & Gas Operator | Aug 2026 |
| 15047 | K P Kauffman Company Inc | Denver, CO 80203 | Oil & Gas Operator | May 2026 |
| 15048 | K Phil Fleetwood Oil Properties LLC | Marlow, OK 73055 | Oil & Gas Operator | May 2026 |
| 15049 | K R M Petroleum | | Oil & Gas Operator | Jan 1990 |
| 15050 | K R S Expl., Inc. | | Oil Operator | Oct 2020 |
| 15051 | K R Well Technology, LLC | Dimmitt, TX 79027 | Oil Operator | Aug 2026 |
| 15052 | K S & S Oil Company Inc | Terral, TX 73569-5056 | Oil Operator | May 2026 |
| 15053 | K S Oil Company Inc | Norman, OK 73072-7480 | Oil & Gas Operator | May 2026 |
| 15054 | K Spencer LLC | Drumright, OK 74030-5825 | Oil & Gas Operator | Sep 2019 |
| 15055 | K W Drilling, Inc. | Topeka, KS 66617 | Gas Operator | Sep 1991 |
| 15056 | K W Oil Well Service. Inc. | Chanute, KS 66720 | Oil Operator | Apr 2017 |
| 15057 | K Wilson Enterprises Inc. | | Oil Operator | Jan 2025 |
| 15058 | K&C Pump Truck, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2018 |
| 15059 | K&M LLC | | Oil Operator | Mar 2026 |
| 15060 | K&M Resources LLC | Artesia, NM 88211 | Oil & Gas Operator | May 2026 |
| 15061 | K-3 Energy Corpo | | Oil Operator | May 1988 |
| 15062 | K-B Exploration Co. | Houston, TX 77057 | Oil & Gas Operator | Aug 2026 |
| 15063 | K-B Oil Company | Dallas, TX 75243 | Oil & Gas Operator | Dec 2020 |
| 15064 | K-B Oil Company, LLC | Dallas, TX 75243 | Oil & Gas Operator | Aug 2026 |
| 15065 | K-Bar Oil LLC | McPherson, KS 67460 | Oil Operator | Apr 2026 |
| 15066 | K-C Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Jan 2013 |
| 15067 | K-D Operations | N Richlnd HLS, TX 76182 | Oil Operator | Aug 2026 |
| 15068 | K-M Oil Company, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Aug 2026 |
| 15069 | K-Tel Petroleum | Englewood, CO 80111-4628 | Oil & Gas Operator | Sep 2007 |
| 15070 | K-Von Enterprises Inc | Tecumseh, OK 74873 | Oil & Gas Operator | Jan 1994 |
| 15071 | K-W Oil - Evans | | Oil Operator | Jan 1994 |
| 15072 | K. D. Lankford, Jr & L&N DRLG Co | | Gas Operator | Dec 2010 |
| 15073 | K. D. Lankford, Jr., Et Al | | Gas Operator | Dec 2010 |
| 15074 | K. D. Operating LLC. | Wichita Falls, TX 76308 | Oil Operator | Aug 2026 |
| 15075 | K. F. Operating Company | Burkburnett, TX 76354 | Oil & Gas Operator | Mar 2008 |
| 15076 | K. G. H. Enterprises | | Oil Operator | Dec 2003 |
| 15077 | K. J. Enterprises LLC | | Oil Operator | Dec 2001 |
| 15078 | K. O. C. Corporation | Sherman, TX 75091 | Oil & Gas Operator | Aug 2026 |
| 15079 | K. Petroleum, Inc. | Gahanna, OH 43230 | Oil & Gas Operator | May 2026 |
| 15080 | K. Stewart Petroleum Corporation | Oklahoma City, OK 73103 | Oil & Gas Operator | Jun 2001 |
| 15081 | K.A. Barnes Oil & Gas Oper, LLC | Somerset, TX 78069 | Oil Operator | Aug 2026 |
| 15082 | K.B. Oil & Gas | | Oil & Gas Operator | Mar 2026 |
| 15083 | K.C. Development, Inc. | Marion, KS 66861 | Oil Operator | Mar 2009 |
| 15084 | K.C. Energy | Kansas City, MO 64111 | Oil Operator | Apr 1986 |
| 15085 | K.C. Operations | | Oil Operator | Apr 2026 |
| 15086 | K.E. Snyder Co., LLC | Hamilton, KS 66853 | Oil Operator | Apr 2026 |
| 15087 | K.J.S. Oil | | Oil & Gas Operator | Apr 2026 |
| 15088 | K.M.A. Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 15089 | K.W.A., Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 15090 | K.W.S. Oil Development | Chanute, KS 66720 | Oil Operator | May 2004 |
| 15091 | K.Z.I. Oil & Gas Company | Bellville, TX 77418 | Oil & Gas Operator | May 2002 |
| 15092 | K2 America Corporation | Calgary, AB T3P 3S8 | Oil & Gas Operator | Nov 2017 |
| 15093 | K2 Petroleum, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | Aug 2026 |
| 15094 | K3 Oil & Gas Operating Company | Spring, TX 77383 | Oil & Gas Operator | Apr 2026 |
| 15095 | K3 Productions LLC | Houston, TX 77269 | Oil & Gas Operator | Aug 2026 |
| 15096 | Ka Energy Op Co. LLC | Oakland, CA 94605 | Oil & Gas Operator | Oct 2021 |
| 15097 | Ka Tex Energies, Inc. | Iola, TX 77861 | Oil & Gas Operator | May 1999 |
| 15098 | Ka-Lyn Oil & Gas Inc. | | Oil & Gas Operator | Jul 1990 |
| 15099 | Kabco Oil & Gas Company | Longview, TX 75604 | Oil & Gas Operator | Jun 2018 |
| 15100 | Kabco Production | | Oil & Gas Operator | Sep 1999 |