| 13001 | Hilliard Oil & Gas, Inc. | New Orleans, LA 70112 | Oil & Gas Operator | May 2001 |
| 13002 | Hilliard Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 2009 |
| 13003 | Hilliker Oil Com | | Oil Operator | Jul 1984 |
| 13004 | Hilliker Production | Indian Wells, CA 92210 | Oil & Gas Operator | Jul 2007 |
| 13005 | Hillin Prod. Co. | Odessa, TX 79760 | Oil & Gas Operator | Apr 2002 |
| 13006 | Hillin Simon/Prime Expl., L.C. | Midland, TX 79702 | Oil & Gas Operator | Jun 2000 |
| 13007 | Hillin, T. A. | Kerrville, TX 78028 | Oil & Gas Operator | Aug 2020 |
| 13008 | Hillin-Simon Oil Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2013 |
| 13009 | Hills Dozer Service | Stroud, OK 74079 | Oil & Gas Operator | Mar 2022 |
| 13010 | Hillside Oil & Gas, LLC | Midland, TX 79708 | Oil & Gas Operator | Apr 2016 |
| 13011 | Hillside Oil Inc | Aurora, ON L4G | Oil Operator | Dec 2021 |
| 13012 | Hillside Oil Partners | | Oil & Gas Operator | Dec 1999 |
| 13013 | Hillside Resources | Bartlesville, OK 74005 | Oil & Gas Operator | Jan 2007 |
| 13014 | Hilltex Operating Company, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2026 |
| 13015 | Hilltop Development Corp | Frazeysburg, OH 43822 | Oil & Gas Operator | Dec 1984 |
| 13016 | Hilltop Disposal LLC | Elk City, OK 73644-2400 | Oil Operator | Jun 2021 |
| 13017 | Hilltop Exploration, Inc. | Sedan, KS 67361 | Oil Operator | Jan 2000 |
| 13018 | Hilltop Petroleum LLC | Weatherford, TX 76086 | Oil & Gas Operator | Sep 2026 |
| 13019 | Hilltopper Energy, LLC | Hopkinsville, KY 42240 | Oil & Gas Operator | Dec 2023 |
| 13020 | Hillwood Energy Texas, L.P. | Fort Worth, TX 76177 | Gas Operator | Jan 2010 |
| 13021 | Hillwood O & G Operating Co LP | Fort Worth, TX 76102 | Gas Operator | Sep 2026 |
| 13022 | Hilty Interests, Inc. | Kerrville, TX 78028 | Oil & Gas Operator | Jun 1989 |
| 13023 | Himco Oil & Gas Inc | Enid, OK 73702 | Oil & Gas Operator | Jun 2026 |
| 13024 | Hindman, E. C. Jr. Partnership | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2008 |
| 13025 | Hinds Petroleum, LLC | Houston, TX 77263 | Oil Operator | Sep 2026 |
| 13026 | Hinds Petroleum, LP | Houston, TX 77263 | Oil Operator | Feb 2017 |
| 13027 | Hines, Ralph, Jr. | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2002 |
| 13028 | Hinkle Engineering, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2016 |
| 13029 | Hinkle Oil And Gas Inc | Oklahoma City, OK 73112-4275 | Oil & Gas Operator | Jul 2026 |
| 13030 | Hinkle Oil Compa | | Oil & Gas Operator | Nov 1994 |
| 13031 | Hinkle Oil Company | Wichita, KS 67202 | Oil & Gas Operator | Jan 1999 |
| 13032 | Hinkle, Howard L. | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 2026 |
| 13033 | Hinks Petroleum Co., Inc. | Wichita, KS 67201 | Oil Operator | May 1999 |
| 13034 | Hinson Bobbie L | Bristow, OK 74010 | Oil & Gas Operator | Feb 2026 |
| 13035 | Hinson Jr Bobbie L | Bristow, OK 74010 | Oil & Gas Operator | Jul 2020 |
| 13036 | Hinto Energy, LLC | Edwards, CO 81632 | Oil Operator | Mar 2017 |
| 13037 | Hinton Production Company | MT Pleasant, TX 75455 | Oil & Gas Operator | Aug 1995 |
| 13038 | Hinton Well Servicing, Inc. | | Oil Operator | Feb 2008 |
| 13039 | Hinton, W. B. | MT Pleasant, TX 75455 | Oil & Gas Operator | Jul 1993 |
| 13040 | Hipp Oil And Gas Inc. | Big Spring, TX 79720 | Oil & Gas Operator | Sep 2026 |
| 13041 | Hirt Farms Incor | | Oil & Gas Operator | Apr 1994 |
| 13042 | His Energy Corporation Inc | Newcastle, OK 73065-1461 | Oil Operator | Feb 2018 |
| 13043 | Hispanic Oil & Gas Energy, LLC | Houston, TX 77056 | Oil Operator | Jun 2026 |
| 13044 | Hitchcock, VIcki L. & Jacob J. | Randolph, NY 14772 | Gas Operator | Dec 2025 |
| 13045 | Hitchita #1 LP | Edmond, OK 73013-6628 | Oil & Gas Operator | Sep 1997 |
| 13046 | Hitex Resources, LP | Houston, TX 77265 | Oil & Gas Operator | Sep 2026 |
| 13047 | Hiwa Petroleum Corp. | | Oil & Gas Operator | Jul 2026 |
| 13048 | Hixon James E | | Oil Operator | Feb 2004 |
| 13049 | Hizey Service & | | Oil Operator | Apr 1994 |
| 13050 | HJ, Inc. | Garden City, KS 67846 | Oil & Gas Operator | May 2026 |
| 13051 | HK Eagle LLC | Lakewood, CO 80228 | Oil Operator | Jun 2026 |
| 13052 | HK Energy Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2023 |
| 13053 | HKW Oil Company, Inc. | Bunker Hill, KS 67626 | Oil Operator | Dec 2009 |
| 13054 | HLH Drilling Inc | Andover, OH 44003 | Oil & Gas Operator | Dec 1985 |
| 13055 | HLH Realty Co | Drumright, OK 74030 | Oil & Gas Operator | Mar 2016 |
| 13056 | HMD Oil Co Inc | Ardmore, OK 73401-2542 | Oil & Gas Operator | Jul 2026 |
| 13057 | HMH Operators, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 13058 | HMN Partnership | Argonia, KS 67004 | Oil Operator | Nov 1993 |
| 13059 | HMT Genesis Petroleum Corp. | Fort Worth, TX 76116 | Oil & Gas Operator | Nov 2008 |
| 13060 | HMX Investments, Inc. | Katy, TX 77494 | Oil & Gas Operator | Jun 2026 |
| 13061 | HNG Oil Company | | Oil & Gas Operator | Jun 1987 |
| 13062 | HNG Storage Company | Houston, TX 77042 | Oil & Gas Operator | Mar 2002 |
| 13063 | Hoag Memorial Hospital Presbyterian | | Gas Operator | Jul 2026 |
| 13064 | Hoard John L Family Trust | Ardmore, OK 73402-1706 | Oil & Gas Operator | Jun 2022 |
| 13065 | Hobbs Energy Corporation | San Angelo, TX 76904 | Oil & Gas Operator | Mar 2008 |
| 13066 | Hobbs Oil Co. | | Oil Operator | Dec 1999 |
| 13067 | Hobbs Production LLC | | Oil Operator | Mar 2023 |
| 13068 | Hobbs, Columbus Agent | | Oil & Gas Operator | Dec 2018 |
| 13069 | Hobo Oil & Gas | | Oil & Gas Operator | Aug 2013 |
| 13070 | Hobson Petroleum Corp | | Oil & Gas Operator | Sep 1991 |
| 13071 | Hoc Ca LLC | | Oil & Gas Operator | Aug 2026 |
| 13072 | Hoc Operating Co., Inc. | Houston, TX 77056 | Oil & Gas Operator | Nov 1999 |
| 13073 | Hochendel Consultants | | Oil & Gas Operator | Jul 1995 |
| 13074 | Hocking Hills Energy And Well Service LLC | Logan, OH 43138-8497 | Oil & Gas Operator | Dec 2024 |
| 13075 | Hockran, Thomas A. | Bemus Point, NY 14712 | Gas Operator | Dec 2025 |
| 13076 | Hoco Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2026 |
| 13077 | Hodgden Operating Co., Inc. | Enid, OK 73702 | Oil & Gas Operator | Jul 2026 |
| 13078 | Hodgden, Jack D. | Enid, OK 73702 | Oil & Gas Operator | Apr 2000 |
| 13079 | Hodge T F | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2007 |
| 13080 | Hodge, T.F. & Morrow Oil & Gas Co. | | Oil & Gas Operator | Sep 1993 |
| 13081 | Hodges & Hodges Oil Venture | Gallup, NM 87301 | Oil Operator | May 1999 |
| 13082 | Hodges & Hodges Productions | Anson, TX 79501 | Oil & Gas Operator | Aug 2003 |
| 13083 | Hodges & Rister | Abilene, TX 79603 | Oil & Gas Operator | Apr 2016 |
| 13084 | Hodges Oil | | Oil Operator | May 2026 |
| 13085 | Hodges, Dennis D. And Peggy D. | Reading, KS 66868 | Oil Operator | May 2026 |
| 13086 | Hodges, James Aaron | Fort Worth, TX 76179 | Oil & Gas Operator | Sep 2026 |
| 13087 | Hodges, Thomas | Alvord, TX 76225 | Oil & Gas Operator | Oct 2002 |
| 13088 | Hoefle Oil Company | | Gas Operator | Dec 2011 |
| 13089 | Hoehn French | Enid, OK 73701-5600 | Oil & Gas Operator | Oct 1996 |
| 13090 | Hoehn Oil | Wellsville, KS 66092 | Oil Operator | Oct 1998 |
| 13091 | Hoehn Oil LLC | Wellsville, KS 66092 | Oil Operator | May 2026 |
| 13092 | Hoell Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2026 |
| 13093 | Hoelscher, Weldon | San Angelo, TX 76904 | Oil & Gas Operator | Aug 2003 |
| 13094 | Hoener Ross Inco | | Oil Operator | Dec 1991 |
| 13095 | Hoener, Ross | Iuka, KS 67066 | Oil & Gas Operator | May 2026 |
| 13096 | Hoepker, Larry | Humboldt, KS 66748 | Oil Operator | May 2026 |
| 13097 | Hoermann, S. E. | Seguin, TX 78155 | Oil & Gas Operator | Sep 2026 |
| 13098 | Hofco, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Sep 2026 |
| 13099 | Hoff Elmer & Mildred | | Oil & Gas Operator | Jan 1991 |
| 13100 | Hoff Oil & Gas | | Oil Operator | May 2013 |