| 11901 | H & M Integrity LLC | Ratliff City, OK 73481-8052 | Oil Operator | Mar 2026 |
| 11902 | H & M Oil Producers | Littleton, CO 80160 | Oil & Gas Operator | Apr 2000 |
| 11903 | H & M Packers Serv. L.L.C. | | Oil Operator | Dec 2019 |
| 11904 | H & M Petroleum Corporation | Lincoln, NE 68516 | Oil & Gas Operator | Jun 2025 |
| 11905 | H & M Productions L.L.C. | Overland Park, KS 66210 | Oil Operator | May 1998 |
| 11906 | H & M Resources LLC | Dallas, TX 75225 | Oil & Gas Operator | Jun 2026 |
| 11907 | H & N Operating Co. Inc. | | Oil & Gas Operator | Oct 1997 |
| 11908 | H & O Oil Co. | | Oil & Gas Operator | Dec 1989 |
| 11909 | H & O Operating Co | Odessa, TX 79764 | Oil & Gas Operator | Mar 2008 |
| 11910 | H & P Exploration Co. | Alice, TX 78333 | Oil & Gas Operator | May 2019 |
| 11911 | H & P Partnership | La Vernia, TX 78121 | Oil Operator | Jun 2026 |
| 11912 | H & R Expl & Production Inc | Sidney, NE 69162 | Oil Operator | May 2007 |
| 11913 | H & R Exploratio | | Oil Operator | Feb 1992 |
| 11914 | H & R Oil Company | | Oil & Gas Operator | Dec 2000 |
| 11915 | H & R Well Services, Inc. | FT Morgan, CO 80701 | Oil & Gas Operator | Apr 2015 |
| 11916 | H & S Drilling Co Inc | Frazeysburg, OH 43822 | Oil & Gas Operator | Dec 2016 |
| 11917 | H & S Investments LLC | Fairview, PA 16415-1807 | Oil & Gas Operator | Dec 2025 |
| 11918 | H & S Oil Co., LLC | Cherryvale, KS 67335 | Oil Operator | Oct 2024 |
| 11919 | H & S Oil LLC | Roswell, NM 882022387 | Oil & Gas Operator | Jul 2013 |
| 11920 | H & S Operating Company Inc | Winesburg, OH 44690 | Oil & Gas Operator | Dec 2025 |
| 11921 | H & S Production | Farmington, NM 87401 | Oil Operator | Dec 2007 |
| 11922 | H & S Production, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Mar 2004 |
| 11923 | H & T Brock Oil Company LLC | Comanche, OK 73529-7140 | Oil & Gas Operator | Feb 2024 |
| 11924 | H & T Disposal | Abilene, TX 79608 | Oil Operator | Apr 2003 |
| 11925 | H & T Exploration, Inc. | Longview, TX 75605 | Oil & Gas Operator | Jun 2026 |
| 11926 | H & T Oil & Gas Company, Inc. | Alice, TX 78333 | Oil & Gas Operator | Mar 2008 |
| 11927 | H & W Drilling Inc | Racine, OH 45769 | Oil & Gas Operator | Dec 2023 |
| 11928 | H & W Energy | Youngstown, OH 44512 | Oil & Gas Operator | Dec 2015 |
| 11929 | H & W Oil | Electra, TX 76360 | Oil & Gas Operator | Mar 2008 |
| 11930 | H & W Oil Company, Incorporated | Palm Desert, CA 92255 | Oil Operator | Nov 2017 |
| 11931 | H & W Oil Corpor | | Oil Operator | Dec 1996 |
| 11932 | H - A Energy, Inc. | Midland, TX 79704 | Oil & Gas Operator | Jun 2026 |
| 11933 | H A L Petroleum | | Oil Operator | Oct 1987 |
| 11934 | H And H | Gonzales, TX 78629 | Oil Operator | Feb 1999 |
| 11935 | H And H Star Energy Inc Dba Petrostar Energy | | Oil & Gas Operator | Feb 2004 |
| 11936 | H And K Resources Inc | | Oil Operator | Dec 2012 |
| 11937 | H B Oil & Gas Inc | Oklahoma City, OK 73159 | Oil & Gas Operator | Jun 2000 |
| 11938 | H C M Energy LLC | Billings, MT 59102 | Oil Operator | Jul 2003 |
| 11939 | H D Oil Company | Thermopolis, WY 82443 | Oil Operator | Feb 2026 |
| 11940 | H E C H Corporation | Ada, OK 74820-9528 | Oil Operator | Sep 2019 |
| 11941 | H E C I Exploration Company | | Oil & Gas Operator | Dec 1990 |
| 11942 | H F Production Co., LTD. | Wichita Falls, TX 76309 | Oil Operator | Feb 2020 |
| 11943 | H G & G Inc | Edmond, OK 73034 | Oil & Gas Operator | Jan 2006 |
| 11944 | H G H Oil Company | | Oil Operator | Dec 1990 |
| 11945 | H H Exploration, Inc. | Incline VLLG, NV 89451 | Gas Operator | Feb 2018 |
| 11946 | H H H Oil Company | | Oil Operator | Jan 2025 |
| 11947 | H I Smith Oil & Gas Inc | Holmesville, OH 44633 | Oil & Gas Operator | Dec 2025 |
| 11948 | H K A Enterprises Inc | Kettle, KY 42717 | Oil Operator | Dec 2021 |
| 11949 | H K Keesee And C J Keesee Trust | Aztec, NM 87410 | Gas Operator | Apr 2026 |
| 11950 | H L Altier Service Co Inc | Canton, OH 44718-3752 | Oil & Gas Operator | Dec 2013 |
| 11951 | H L Brown Jr | Midland, TX 79702 | Oil & Gas Operator | May 2001 |
| 11952 | H L Brown Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 11953 | H L L Inc | Scottsdale, AZ 85251 | Oil & Gas Operator | Jan 2007 |
| 11954 | H M Jarred & Walsh-Watts | | Oil & Gas Operator | Sep 1992 |
| 11955 | H Oil Company, Inc. | Edna, TX 77957 | Oil & Gas Operator | Mar 2005 |
| 11956 | H P S Investments | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 11957 | H R Collier Collier Oil & Gas | | Oil & Gas Operator | Apr 2026 |
| 11958 | H R E Rental Company | Premont, TX 78375 | Oil & Gas Operator | Sep 2015 |
| 11959 | H R F Antrim LP | | Gas Operator | Apr 2026 |
| 11960 | H&G Petroleum Corporation | Midland, TX 79710 | Oil & Gas Operator | Jun 2026 |
| 11961 | H&K Energy | Stockdale, TX 78160 | Oil & Gas Operator | Jul 2005 |
| 11962 | H&M Production, Inc. | New Braunfels, TX 78132 | Oil & Gas Operator | Aug 2012 |
| 11963 | H&P Oil & Gas LLC | Mertzon, TX 76941 | Oil & Gas Operator | Jun 2026 |
| 11964 | H&P Operating | Megargel, TX 76370 | Oil & Gas Operator | Jan 2015 |
| 11965 | H&S Production, LLC | | Oil Operator | Nov 2024 |
| 11966 | H-30 Incorporate | | Oil & Gas Operator | Nov 1990 |
| 11967 | H-30, Inc. | Wichita, KS 67202 | Gas Operator | Oct 2006 |
| 11968 | H-5 Service | Plainville, KS 67663 | Oil Operator | May 1989 |
| 11969 | H-D Oilfield Service, Inc. | Bazine, KS 67516 | Oil Operator | Feb 2026 |
| 11970 | H-D Operating Services L.L.C. | Pampa, TX 79065 | Oil Operator | Jun 2026 |
| 11971 | H-M Resource Management, Inc. | Houston, TX 77055 | Oil & Gas Operator | Feb 2023 |
| 11972 | H-Petro-R Inc | Edmond, OK 73013 | Oil & Gas Operator | Mar 2026 |
| 11973 | H-S Exploration | Gunnison, CO 81230 | Oil & Gas Operator | Jun 2026 |
| 11974 | H-Two-O Investments | Iowa Park, TX 76367 | Oil Operator | Sep 2019 |
| 11975 | H. & H. Development Co. | | Gas Operator | Aug 2019 |
| 11976 | H. & J. Drilling Company | River Oaks, TX 76114 | Oil & Gas Operator | Aug 2003 |
| 11977 | H. & L. Oil Company | Midland, TX 79707 | Oil & Gas Operator | Mar 2005 |
| 11978 | H. A. Harper | | Oil Operator | Dec 1982 |
| 11979 | H. B. McCullough | | Oil Operator | Oct 2004 |
| 11980 | H. Bryan Poff, LLC | Cedar Park, TX 78613 | Oil & Gas Operator | Oct 2018 |
| 11981 | H. C. Oil Co. | Weatherford, TX 76085 | Oil & Gas Operator | Jun 2026 |
| 11982 | H. D. Investments | Breckenridge, TX 76424 | Oil & Gas Operator | Mar 2025 |
| 11983 | H. D. McCormick | | Oil & Gas Operator | Jun 2016 |
| 11984 | H. E. Sutton | | Oil & Gas Operator | Jan 1990 |
| 11985 | H. G. Oil Operator | | Oil Operator | Mar 2001 |
| 11986 | H. H. Blair Oil Company, Inc. | Atlanta, KS 67008 | Oil Operator | Dec 2009 |
| 11987 | H. I. M. Producers | Graham, TX 76450 | Oil & Gas Operator | May 1999 |
| 11988 | H. I., Inc. | Liberal, KS 67901 | Oil & Gas Operator | Feb 2012 |
| 11989 | H. J. Bonner | | Oil & Gas Operator | Aug 1991 |
| 11990 | H. K. Beebe | | Oil Operator | Jan 1990 |
| 11991 | H. L. Hunt | | Oil & Gas Operator | Jun 1980 |
| 11992 | H. L. McKee & J. P. McKee Jr. | | Gas Operator | Mar 2023 |
| 11993 | H. L. Richey | | Oil & Gas Operator | Sep 1995 |
| 11994 | H. O. Strickler Operator | | Oil & Gas Operator | Dec 1993 |
| 11995 | H. Olsen & Sons Contractors, Inc. | Forestville, NY 14062 | Gas Operator | Dec 2024 |
| 11996 | H. Proler-Luffey Gas Corp. | | Gas Operator | Apr 1979 |
| 11997 | H. T. Hilliard & Co. | | Oil & Gas Operator | Dec 1999 |
| 11998 | H. W. Reynolds Jr. | | Gas Operator | Dec 1984 |
| 11999 | H.A.N. Operating Incorporated | Clyde, TX 79510 | Oil & Gas Operator | Aug 2016 |
| 12000 | H.D. Smith, Inc. | Waller, TX 77484 | Oil Operator | Jun 2026 |