| 13301 | Hill Production | | Oil & Gas Operator | Nov 1981 |
| 13302 | Hill Production Co Inc-Wisconsin | Humble, TX 77347 | Oil & Gas Operator | Jun 1993 |
| 13303 | Hill Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2009 |
| 13304 | Hill Production Company No. 2 | Kilgore, TX 75663 | Oil & Gas Operator | May 2025 |
| 13305 | Hill Resources Inc | | Oil & Gas Operator | Nov 2022 |
| 13306 | Hill Robert H & Willa F | Morris, OK 74445 | Oil & Gas Operator | Apr 2020 |
| 13307 | Hill William F | Millersburg, OH 44654 | Oil & Gas Operator | Dec 1993 |
| 13308 | Hill William H | Broken Arrow, OK 74012-8952 | Oil & Gas Operator | Apr 2020 |
| 13309 | Hill, A G | Dallas, TX 75201 | Oil & Gas Operator | May 2008 |
| 13310 | Hill, Albert, Trust | Dallas, TX 75201 | Oil & Gas Operator | May 2008 |
| 13311 | Hill, Bill | Kilgore, TX 75663 | Oil Operator | Mar 2014 |
| 13312 | Hill, Charles Drilling, Inc. | Grand Prairie, TX 75052 | Oil & Gas Operator | May 2025 |
| 13313 | Hill, Gillman A | Englewood, CO 80112 | Oil & Gas Operator | Jun 1993 |
| 13314 | Hill, Hub, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Jan 1994 |
| 13315 | Hill, R.M. Operating Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 13316 | Hill, T. R. | Graham, TX 76450 | Oil & Gas Operator | Apr 1995 |
| 13317 | Hill-Lake Gas Storage, L.P. | Houston, TX 77057 | Oil & Gas Operator | Aug 2010 |
| 13318 | Hill-Lake Gas Storage, LLC | Tulsa, OK 74172 | Oil & Gas Operator | May 2025 |
| 13319 | Hillary Oil Comp | | Oil & Gas Operator | Apr 1991 |
| 13320 | Hillcrest Petroleum, LLC | Midland, TX 79707 | Oil & Gas Operator | Jun 2019 |
| 13321 | Hillenburg Oil C | | Oil Operator | Apr 1994 |
| 13322 | Hillenburg Oil Co., A General Partnership | Broken Arrow, OK 74011 | Oil Operator | Jan 2025 |
| 13323 | Hillenburg Oil Company | Broken Arrow, OK 74011-4021 | Oil Operator | Apr 2011 |
| 13324 | Hilliard Oil | Bronte, TX 76933 | Oil & Gas Operator | Mar 2008 |
| 13325 | Hilliard Oil & Gas Inc | New Orleans, LA 70112 | Oil & Gas Operator | May 2001 |
| 13326 | Hilliard Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 2009 |
| 13327 | Hilliker Oil Com | | Oil Operator | Jul 1984 |
| 13328 | Hilliker Production | Indian Wells, CA 92210 | Oil & Gas Operator | Jul 2007 |
| 13329 | Hillin Prod. Co. | Odessa, TX 79760 | Oil & Gas Operator | Apr 2002 |
| 13330 | Hillin Simon/Prime Expl., L.C. | Midland, TX 79702 | Oil & Gas Operator | Jun 2000 |
| 13331 | Hillin, T. A. | Kerrville, TX 78028 | Oil & Gas Operator | Aug 2020 |
| 13332 | Hillin-Simon Oil Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2013 |
| 13333 | Hills Dozer Service | Stroud, OK 74079 | Oil & Gas Operator | Mar 2022 |
| 13334 | Hillside Oil & Gas, LLC | Midland, TX 79708 | Oil & Gas Operator | Apr 2016 |
| 13335 | Hillside Oil Inc | Aurora, ON L4G | Oil Operator | Dec 2021 |
| 13336 | Hillside Oil Partners | | Oil & Gas Operator | Dec 1999 |
| 13337 | Hillside Resources | Bartlesville, OK 74005 | Oil & Gas Operator | Jan 2007 |
| 13338 | Hilltex Operating Company, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jul 2021 |
| 13339 | Hilltop Development Corp | Frazeysburg, OH 43822 | Oil & Gas Operator | Dec 1984 |
| 13340 | Hilltop Disposal LLC | Elk City, OK 73644-2400 | Oil Operator | Jun 2021 |
| 13341 | Hilltop Exploration, Inc. | Sedan, KS 67361 | Oil Operator | Jan 2000 |
| 13342 | Hilltop Petroleum LLC | Weatherford, TX 76086 | Oil & Gas Operator | May 2025 |
| 13343 | Hilltopper Energy, LLC | Hopkinsville, KY 42240 | Oil & Gas Operator | Dec 2023 |
| 13344 | Hillwood Energy Texas, L.P. | Fort Worth, TX 76177 | Gas Operator | Jan 2010 |
| 13345 | Hillwood O & G Operating Co LP | Fort Worth, TX 76102 | Gas Operator | May 2025 |
| 13346 | Hilty Interests, Inc. | Kerrville, TX 78028 | Oil & Gas Operator | Jun 1989 |
| 13347 | Himco Oil & Gas, Inc. | Enid, OK 73702 | Oil & Gas Operator | Feb 2025 |
| 13348 | Hindman, E. C. Jr. Partnership | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2008 |
| 13349 | Hinds Petroleum, LLC | Houston, TX 77263 | Oil Operator | May 2025 |
| 13350 | Hinds Petroleum, LP | Houston, TX 77263 | Oil Operator | Feb 2017 |
| 13351 | Hines, Ralph, Jr. | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2002 |
| 13352 | Hinkle Engineering, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2016 |
| 13353 | Hinkle Oil And Gas Inc | Oklahoma City, OK 73112-4275 | Oil & Gas Operator | Mar 2025 |
| 13354 | Hinkle Oil Compa | | Oil & Gas Operator | Nov 1994 |
| 13355 | Hinkle Oil Company | Wichita, KS 67202 | Oil & Gas Operator | Jan 1999 |
| 13356 | Hinkle, Howard L. | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2025 |
| 13357 | Hinks Petroleum Co., Inc. | Wichita, KS 67201 | Oil Operator | May 1999 |
| 13358 | Hinson Bobbie L | Bristow, OK 74010 | Oil & Gas Operator | Mar 2025 |
| 13359 | Hinson Jr Bobbie L | Bristow, OK 74010 | Oil & Gas Operator | Jul 2020 |
| 13360 | Hinterer, Dolores | New Milton, WV 26411-0000 | Gas Operator | Dec 2021 |
| 13361 | Hinto Energy, LLC | Edwards, CO 81632 | Oil Operator | Mar 2017 |
| 13362 | Hinton Production Company | MT Pleasant, TX 75455 | Oil & Gas Operator | Aug 1995 |
| 13363 | Hinton Well Servicing, Inc. | | Oil Operator | Feb 2008 |
| 13364 | Hinton, W. B. | MT Pleasant, TX 75455 | Oil & Gas Operator | Jul 1993 |
| 13365 | Hipp Oil And Gas Inc. | Big Spring, TX 79720 | Oil & Gas Operator | May 2025 |
| 13366 | Hirt Farms Incor | | Oil & Gas Operator | Apr 1994 |
| 13367 | His Energy Corporation Inc | Newcastle, OK 73065-1461 | Oil Operator | Feb 2018 |
| 13368 | Hispanic Oil & Gas Energy, LLC | Houston, TX 77056 | Oil Operator | Feb 2025 |
| 13369 | Hitchcock, VIcki L. & Jacob J. | Randolph, NY 14772 | Gas Operator | Dec 2023 |
| 13370 | Hitchita #1 LP | Edmond, OK 73013-6628 | Oil & Gas Operator | Sep 1997 |
| 13371 | Hitex Resources, LP | Houston, TX 77265 | Oil & Gas Operator | May 2025 |
| 13372 | Hiwa Petroleum Corp. | | Oil & Gas Operator | Mar 2025 |
| 13373 | Hixon James E | | Oil Operator | Feb 2004 |
| 13374 | Hizey Service & | | Oil Operator | Apr 1994 |
| 13375 | HJ, Inc. | Garden City, KS 67846 | Oil & Gas Operator | Jan 2025 |
| 13376 | HK Energy Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2023 |
| 13377 | HKW Oil Company, Inc. | Bunker Hill, KS 67626 | Oil Operator | Dec 2009 |
| 13378 | HLH Drilling Inc | Andover, OH 44003-960-960 | Oil & Gas Operator | Dec 1985 |
| 13379 | HLH Realty Co | Drumright, OK 74030 | Oil & Gas Operator | Mar 2016 |
| 13380 | HMD Oil Co Inc | Ardmore, OK 73401-2542 | Oil & Gas Operator | Mar 2025 |
| 13381 | HMH Operators, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 13382 | HMN Partnership | Argonia, KS 67004 | Oil Operator | Nov 1993 |
| 13383 | HMT Genesis Petroleum Corp. | Fort Worth, TX 76116 | Oil & Gas Operator | Nov 2008 |
| 13384 | HMX Investments, Inc. | Katy, TX 77494 | Oil & Gas Operator | Feb 2025 |
| 13385 | HNG Oil Company | | Oil & Gas Operator | Jun 1987 |
| 13386 | HNG Storage Company | Houston, TX 77042 | Oil & Gas Operator | Mar 2002 |
| 13387 | Hoag Memorial Hospital Presbyterian | | Gas Operator | Mar 2025 |
| 13388 | Hoard John L Family Trust | Ardmore, OK 73402-1706 | Oil & Gas Operator | Jun 2022 |
| 13389 | Hobbs Energy Corporation | San Angelo, TX 76904 | Oil & Gas Operator | Mar 2008 |
| 13390 | Hobbs Oil Co. | | Oil Operator | Dec 1999 |
| 13391 | Hobbs Production LLC | | Oil Operator | Mar 2023 |
| 13392 | Hobbs, Columbus Agent | | Oil & Gas Operator | Dec 2018 |
| 13393 | Hobbs, Donald M. | Edinboro, PA 16412 | Gas Operator | Dec 2023 |
| 13394 | Hobo Oil & Gas | | Oil & Gas Operator | Aug 2013 |
| 13395 | Hobson Petroleum Corp | | Oil & Gas Operator | Sep 1991 |
| 13396 | Hoc Ca LLC | | Oil & Gas Operator | Apr 2025 |
| 13397 | Hoc Operating Co., Inc. | Houston, TX 77056 | Oil & Gas Operator | Nov 1999 |
| 13398 | Hochendel Consultants | | Oil & Gas Operator | Jul 1995 |
| 13399 | Hocking Hills Energy And Well Service LLC | Logan, OH 43138-8497 | Oil & Gas Operator | Dec 2023 |
| 13400 | Hocking Technical College | Nelsonville, OH 45764 | Oil & Gas Operator | Dec 2023 |