| 13501 | Hillin-Simon Oil Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2013 |
| 13502 | Hills Dozer Service | Stroud, OK 74079 | Oil & Gas Operator | Mar 2022 |
| 13503 | Hillshafer-Goodway Corp | | Oil & Gas Operator | Jun 1994 |
| 13504 | Hillside Oil & Gas, LLC | Midland, TX 79708 | Oil & Gas Operator | Apr 2016 |
| 13505 | Hillside Oil Inc | Aurora, ON L4G | Oil Operator | Dec 2021 |
| 13506 | Hillside Oil Partners | | Oil & Gas Operator | Dec 1999 |
| 13507 | Hillside Resources | Bartlesville, OK 74005 | Oil & Gas Operator | Jan 2007 |
| 13508 | Hilltex Operating Company, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jul 2021 |
| 13509 | Hilltop Development Corp | Frazeysburg, OH 43822 | Oil & Gas Operator | Dec 1984 |
| 13510 | Hilltop Disposal LLC | Elk City, OK 73644-2400 | Oil Operator | Jun 2021 |
| 13511 | Hilltop Exploration, Inc. | Sedan, KS 67361 | Oil Operator | Jan 2000 |
| 13512 | Hilltop Petroleum LLC | Weatherford, TX 76086 | Oil & Gas Operator | Apr 2025 |
| 13513 | Hilltopper Energy, LLC | Hopkinsville, KY 42240 | Oil & Gas Operator | Dec 2023 |
| 13514 | Hillwood Energy Texas, L.P. | Fort Worth, TX 76177 | Gas Operator | Jan 2010 |
| 13515 | Hillwood O & G Operating Co LP | Fort Worth, TX 76102 | Gas Operator | Apr 2025 |
| 13516 | Hilty Interests, Inc. | Kerrville, TX 78028 | Oil & Gas Operator | Jun 1989 |
| 13517 | Himco Oil & Gas, Inc. | Enid, OK 73702 | Oil & Gas Operator | Jan 2025 |
| 13518 | Hindman, E. C. Jr. Partnership | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2008 |
| 13519 | Hinds Petroleum, LLC | Houston, TX 77263 | Oil Operator | Apr 2025 |
| 13520 | Hinds Petroleum, LP | Houston, TX 77263 | Oil Operator | Feb 2017 |
| 13521 | Hines Oil & Gas LLC | Elk City, OK 73644-9373 | Gas Operator | Aug 2021 |
| 13522 | Hines, Ralph, Jr. | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2002 |
| 13523 | Hinkle Engineering, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2016 |
| 13524 | Hinkle Oil And Gas Inc | Oklahoma City, OK 73112-4275 | Oil & Gas Operator | Feb 2025 |
| 13525 | Hinkle Oil Compa | | Oil & Gas Operator | Nov 1994 |
| 13526 | Hinkle Oil Company | Wichita, KS 67202 | Oil & Gas Operator | Jan 1999 |
| 13527 | Hinkle, Howard L. | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2025 |
| 13528 | Hinks Petroleum Co., Inc. | Wichita, KS 67201 | Oil Operator | May 1999 |
| 13529 | Hinson Bobbie L | Bristow, OK 74010 | Oil & Gas Operator | Nov 2024 |
| 13530 | Hinson Jr Bobbie L | Bristow, OK 74010 | Oil & Gas Operator | Jul 2020 |
| 13531 | Hinterer, Dolores | New Milton, WV 26411-0000 | Gas Operator | Dec 2021 |
| 13532 | Hinto Energy, LLC | Edwards, CO 81632 | Oil Operator | Mar 2017 |
| 13533 | Hinton Production Company | MT Pleasant, TX 75455 | Oil & Gas Operator | Aug 1995 |
| 13534 | Hinton Well Servicing, Inc. | | Oil Operator | Feb 2008 |
| 13535 | Hinton, W. B. | MT Pleasant, TX 75455 | Oil & Gas Operator | Jul 1993 |
| 13536 | Hipp Oil And Gas Inc. | Big Spring, TX 79720 | Oil & Gas Operator | Apr 2025 |
| 13537 | Hirt Farms Incor | | Oil & Gas Operator | Apr 1994 |
| 13538 | His Energy Corporation Inc | Newcastle, OK 73065-1461 | Oil Operator | Feb 2018 |
| 13539 | Hispanic Oil & Gas Energy LLC | | Oil Operator | Jan 2025 |
| 13540 | Hitchcock, VIcki L. & Jacob J. | Randolph, NY 14772 | Gas Operator | Dec 2023 |
| 13541 | Hitchita #1 LP | Edmond, OK 73013-6628 | Oil & Gas Operator | Sep 1997 |
| 13542 | Hitex Resources, LP | Houston, TX 77265 | Oil & Gas Operator | Apr 2025 |
| 13543 | Hiwa Petroleum Corp. | | Oil & Gas Operator | Dec 2024 |
| 13544 | Hixon James E | | Oil Operator | Feb 2004 |
| 13545 | Hizey Service & | | Oil Operator | Apr 1994 |
| 13546 | HJ, Inc. | Garden City, KS 67846 | Oil & Gas Operator | Dec 2024 |
| 13547 | HK Energy Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2023 |
| 13548 | HKW Oil Company, Inc. | Bunker Hill, KS 67626 | Oil Operator | Dec 2009 |
| 13549 | HLH Drilling Inc | Andover, OH 44003-960-960 | Oil & Gas Operator | Dec 1985 |
| 13550 | HLH Realty Co | Drumright, OK 74030 | Oil & Gas Operator | Mar 2016 |
| 13551 | HMD Oil Co Inc | Ardmore, OK 73401-2542 | Oil & Gas Operator | Feb 2025 |
| 13552 | HMH Operators, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 13553 | HMN Partnership | Argonia, KS 67004 | Oil Operator | Nov 1993 |
| 13554 | HMT Genesis Petroleum Corp. | Fort Worth, TX 76116 | Oil & Gas Operator | Nov 2008 |
| 13555 | HMT Pipeline Company, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | Apr 2025 |
| 13556 | HMX Investments Inc | Katy, TX 77494 | Oil & Gas Operator | Jan 2025 |
| 13557 | HNG Oil Company | | Oil & Gas Operator | Jun 1987 |
| 13558 | HNG Storage Company | Houston, TX 77042 | Oil & Gas Operator | Mar 2002 |
| 13559 | Hoag Memorial Hospital Presbyterian | | Gas Operator | Dec 2024 |
| 13560 | Hoard John L Family Trust | Ardmore, OK 73402-1706 | Oil & Gas Operator | Jun 2022 |
| 13561 | Hobbs Energy Corporation | San Angelo, TX 76904 | Oil & Gas Operator | Mar 2008 |
| 13562 | Hobbs Oil Co. | | Oil Operator | Dec 1999 |
| 13563 | Hobbs Production LLC | | Oil Operator | Mar 2023 |
| 13564 | Hobbs, Columbus Agent | | Oil & Gas Operator | Dec 2018 |
| 13565 | Hobbs, Donald M. | Edinboro, PA 16412 | Gas Operator | Dec 2023 |
| 13566 | Hobo Oil & Gas | Wynona, OK 74084 | Oil & Gas Operator | Aug 2013 |
| 13567 | Hobson Petroleum Corp | | Oil & Gas Operator | Sep 1991 |
| 13568 | Hoc Ca LLC | | Oil & Gas Operator | Dec 2024 |
| 13569 | Hoc Operating Co., Inc. | Houston, TX 77056 | Oil & Gas Operator | Nov 1999 |
| 13570 | Hochendel Consultants | | Oil & Gas Operator | Jul 1995 |
| 13571 | Hocking Hills Energy And Well Service LLC | Logan, OH 43138-8497 | Oil & Gas Operator | Dec 2023 |
| 13572 | Hocking Technical College | Nelsonville, OH 45764 | Oil & Gas Operator | Dec 2023 |
| 13573 | Hockran, Thomas A. | Bemus Point, NY 14712 | Gas Operator | Dec 2023 |
| 13574 | Hoco Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2025 |
| 13575 | Hodgden Operating Co., Inc. | Enid, OK 73702 | Oil & Gas Operator | Feb 2025 |
| 13576 | Hodgden, Jack D. | Enid, OK 73702 | Oil & Gas Operator | Apr 2000 |
| 13577 | Hodge T F | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2007 |
| 13578 | Hodge, T.F. & Morrow Oil & Gas Co. | | Oil & Gas Operator | Sep 1993 |
| 13579 | Hodges & Hodges Oil Venture | Gallup, NM 87301 | Oil Operator | May 1999 |
| 13580 | Hodges & Hodges Productions | Anson, TX 79501 | Oil & Gas Operator | Aug 2003 |
| 13581 | Hodges & Rister | Abilene, TX 79603 | Oil & Gas Operator | Apr 2016 |
| 13582 | Hodges Oil | | Oil Operator | Dec 2024 |
| 13583 | Hodges, Dennis D. And Peggy D. | Reading, KS 66868 | Oil Operator | Oct 2024 |
| 13584 | Hodges, James Aaron | Fort Worth, TX 76179 | Oil & Gas Operator | Apr 2025 |
| 13585 | Hodges, Thomas | Alvord, TX 76225 | Oil & Gas Operator | Oct 2002 |
| 13586 | Hodges, Tommie Ann | Alvord, TX 76225 | Oil & Gas Operator | Jun 2018 |
| 13587 | Hoefle Oil Company | | Gas Operator | Dec 2011 |
| 13588 | Hoehn French | Enid, OK 73701-5600 | Oil & Gas Operator | Oct 1996 |
| 13589 | Hoehn Oil | Wellsville, KS 66092 | Oil Operator | Oct 1998 |
| 13590 | Hoehn Oil LLC | Wellsville, KS 66092 | Oil Operator | Dec 2024 |
| 13591 | Hoell Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 13592 | Hoelscher, Weldon | San Angelo, TX 76904 | Oil & Gas Operator | Aug 2003 |
| 13593 | Hoener Ross Inco | | Oil Operator | Dec 1991 |
| 13594 | Hoener, Ross | Iuka, KS 67066 | Oil & Gas Operator | Dec 2024 |
| 13595 | Hoepker, Larry | Humboldt, KS 66748 | Oil Operator | Dec 2024 |
| 13596 | Hoermann, S. E. | Seguin, TX 78155 | Oil & Gas Operator | Apr 2025 |
| 13597 | Hofco, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2025 |
| 13598 | Hoff Elmer & Mildred | | Oil & Gas Operator | Jan 1991 |
| 13599 | Hoff Oil & Gas | | Oil Operator | May 2013 |
| 13600 | Hoffman George A | | Oil & Gas Operator | Dec 2022 |