| 1301 | Horany, Ray & Ernest | Olney, TX 76374 | Oil & Gas Operator | May 2002 |
| 1302 | Horizon Barnsdall Energy Part LTD I Osage Only | | Oil Operator | Feb 2012 |
| 1303 | Horizon Energy | Vergas, MN 56587 | Oil & Gas Operator | Sep 2025 |
| 1304 | Horizon Energy Corporation | Sand Fork, WV 26430 | Oil & Gas Operator | Dec 2021 |
| 1305 | Horizon Expl. & Dev. Co., Inc. | | Oil & Gas Operator | Jun 1995 |
| 1306 | Horizon Exploration Company | Houston, TX 77019 | Oil & Gas Operator | Aug 2002 |
| 1307 | Horizon Exploration Services | El Paso, TX 79922 | Oil Operator | Apr 2026 |
| 1308 | Horizon Natural Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2024 |
| 1309 | Horizon Natural Gas, LLC | | Oil & Gas Operator | Dec 2018 |
| 1310 | Horizon Natural Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2019 |
| 1311 | Horizon Oil & Ga | | Oil & Gas Operator | Jan 1992 |
| 1312 | Horizon Oil & Gas Co. | Dallas, TX 75221 | Oil & Gas Operator | Jan 2005 |
| 1313 | Horizon Operating Co. | | Oil & Gas Operator | Dec 1995 |
| 1314 | Horizon Prod. And Operating, LLC | Houston, TX 77019 | Oil & Gas Operator | Apr 2026 |
| 1315 | Horizon Resources Inc | Fort Worth, TX 76101-1978 | Oil & Gas Operator | Jul 2006 |
| 1316 | Horizon Ridge Oil Company | Austin, TX 78738 | Oil Operator | Apr 2026 |
| 1317 | Horizon Well Services, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2026 |
| 1318 | Horizontal Development & Production Inc | Lubbock, TX 79493 | Oil & Gas Operator | Jul 2002 |
| 1319 | Horn Eddie L Dba B & E Investments | Bristow, OK 74010 | Oil & Gas Operator | Dec 2025 |
| 1320 | Horn Energy | Eastland, TX 76448 | Oil & Gas Operator | Apr 2026 |
| 1321 | Horn Oil Company | Bristow, OK 74010 | Oil & Gas Operator | Jan 2026 |
| 1322 | Horn R L & Sons Drilling | | Oil Operator | Jun 1997 |
| 1323 | Horn, Henry L | | Oil Operator | Apr 2009 |
| 1324 | Horn, W. J. | Graham, TX 76450 | Oil & Gas Operator | Oct 2004 |
| 1325 | Horne & Moore Oil Co. | Holliday, TX 76366 | Oil & Gas Operator | Feb 2001 |
| 1326 | Horner Oil And Gas Production, Inc. | Cameron, WV 26033 | Oil & Gas Operator | Dec 2021 |
| 1327 | Horning, Jeremiah | Penn Yan, NY 14527 | Gas Operator | Dec 2024 |
| 1328 | Horseshoe Oil Co | Cromwell, OK 74837 | Oil & Gas Operator | Dec 2021 |
| 1329 | Horseshoe Operating Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 2023 |
| 1330 | Horseshoe Production, LLC | Bryson, TX 76427 | Oil & Gas Operator | Apr 2026 |
| 1331 | Horst Energy LLC | Fort Worth, TX 76124 | Oil & Gas Operator | Jun 2019 |
| 1332 | Horst Oil, LLC | Pittsburg, MO 65724 | Oil Operator | Dec 2009 |
| 1333 | Hortin & Huffman Pet Geol | Worthington, OH 43085 | Oil & Gas Operator | Dec 2000 |
| 1334 | Horton & Freeman | | Oil Operator | Apr 1983 |
| 1335 | Horton Mary | Ratliff City, OK 73481 | Oil Operator | May 2020 |
| 1336 | Horton Oil Company | Independence, KS 67301 | Oil & Gas Operator | Jul 2000 |
| 1337 | Horton, Jack | Independence, KS 67301 | Oil & Gas Operator | Aug 2015 |
| 1338 | Horton, John | Sedan, KS 67361 | Oil & Gas Operator | Dec 2025 |
| 1339 | Hosco Operating Inc | Seminole, OK 74868-2447 | Oil & Gas Operator | Aug 2017 |
| 1340 | Hosford Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 1994 |
| 1341 | Hosston Oil Inc. | | Oil Operator | Dec 1993 |
| 1342 | Hot Rod Oil | Vernal, UT 84078 | Oil & Gas Operator | Mar 2026 |
| 1343 | Hot Springs Resources LTD | Casper, WY 82601 | Oil Operator | Dec 2014 |
| 1344 | Hottel Glenn D | W Salem, OH 44287 | Oil & Gas Operator | Dec 1993 |
| 1345 | Hottel Oil & Gas LLC | Wooster, OH 44691-7639 | Oil & Gas Operator | Dec 2013 |
| 1346 | Hotulke Construction LLC | Seminole, OK 74868 | Oil & Gas Operator | Jan 2026 |
| 1347 | Hou-Tex Oil And Gas | | Oil & Gas Operator | Jul 1982 |
| 1348 | Hou-Tex, Inc. | Houston, TX 77224 | Oil & Gas Operator | Jun 2001 |
| 1349 | Houchin, O. E. Inc. | Olney, IL 62450 | Oil & Gas Operator | Feb 1997 |
| 1350 | Hough Oil And Gas | Hominy, OK 74035 | Oil Operator | Jan 2026 |
| 1351 | Houghton Investments LLC | Columbus, OH 43235 | Oil & Gas Operator | Dec 2025 |
| 1352 | Houghton Oil & Gas, Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2009 |
| 1353 | Houma Operating Company, Inc. | | Oil & Gas Operator | Jun 1998 |
| 1354 | Houma Salt Water Disposal Corp | | Oil Operator | Dec 2020 |
| 1355 | Hound Resources LLC | | Oil & Gas Operator | Dec 2025 |
| 1356 | Hounds Oil & Gas LLC | Carbon Hill, OH 43111 | Oil & Gas Operator | Dec 2024 |
| 1357 | House Thomas J | | Oil Operator | Dec 2025 |
| 1358 | House, Dustin | Shawnee, KS 66218 | Oil Operator | Oct 2025 |
| 1359 | Houseco Petroleum Inc | Bristow, OK 74010-0842 | Oil & Gas Operator | Aug 2002 |
| 1360 | Householder Oil Co | Junction City, OH 43748 | Oil & Gas Operator | Dec 1988 |
| 1361 | Houseknecht Oil Producers Inc | | Oil & Gas Operator | Dec 1994 |
| 1362 | Housel John R Jr | | Oil Operator | Oct 1994 |
| 1363 | Housel, Robert E. | Cherryvale, KS 67335 | Oil & Gas Operator | Dec 2003 |
| 1364 | Houser, R. G. | | Oil Operator | Mar 1953 |
| 1365 | Houston Energy & Dev. Inc. | | Oil & Gas Operator | Apr 1994 |
| 1366 | Houston Energy Operating, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jul 2020 |
| 1367 | Houston Energy, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jan 2014 |
| 1368 | Houston Expl. & Prod. Co., Inc. | Austin, TX 78746 | Oil & Gas Operator | Aug 2003 |
| 1369 | Houston Exploration Co, The | Houston, TX 77002 | Oil & Gas Operator | Apr 2017 |
| 1370 | Houston Gulf Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2026 |
| 1371 | Houston Hydrocarbons, Inc. (A) | Houston, TX 77042 | Oil & Gas Operator | Sep 2004 |
| 1372 | Houston Hydrolan | | Oil Operator | Jul 1984 |
| 1373 | Houston Oil & Gas Company, Inc. | Houston, TX 77063 | Oil & Gas Operator | Aug 1995 |
| 1374 | Houston Oil & Minerals Corp. | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 1375 | Houston Oil And Minerals | | Oil & Gas Operator | Oct 1993 |
| 1376 | Houston Oil Fields Company | | Oil & Gas Operator | Apr 1987 |
| 1377 | Houston Oil Prod Enterprises,Inc | Houston, TX 77006 | Oil & Gas Operator | Apr 2026 |
| 1378 | Houston Operating, Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2026 |
| 1379 | Houston Petroleum Company | Houston, TX 77027 | Oil & Gas Operator | Apr 2026 |
| 1380 | Houston Resources Corp. | Houston, TX 77002 | Oil & Gas Operator | Apr 2003 |
| 1381 | Houtchens, D. D. | Gainesville, TX 76240 | Oil & Gas Operator | Apr 2026 |
| 1382 | Houtchens, DD & Anna D LVNG TRST | Garland, TX 75043 | Oil Operator | Jun 2025 |
| 1383 | Hovgard & Fitzgerald | Abilene, TX 79608 | Oil & Gas Operator | Mar 1996 |
| 1384 | Howard & Taylor | Wynnewood, OK 73098 | Oil & Gas Operator | Jan 2026 |
| 1385 | Howard Drilling Inc | Mount Jewett, PA 16740-0556 | Oil & Gas Operator | Dec 2025 |
| 1386 | Howard E. Caywood Inc. | | Oil & Gas Operator | Dec 2025 |
| 1387 | Howard Energy Co Inc | | Oil & Gas Operator | Aug 2011 |
| 1388 | Howard Exploration, Inc. | Houston, TX 77069 | Oil & Gas Operator | Dec 2025 |
| 1389 | Howard Operating Co. | Saint Jo, TX 76265 | Oil & Gas Operator | Apr 2026 |
| 1390 | Howard'S Well Service | | Oil Operator | Jul 2007 |
| 1391 | Howard, Anthony D | Philpot, KY 42366 | Oil Operator | Dec 2023 |
| 1392 | Howard, Anthony E. F. | Tyler, TX 75701 | Oil & Gas Operator | Jun 2001 |
| 1393 | Howard, Douglas J. | Houston, TX 77070 | Oil & Gas Operator | Mar 2008 |
| 1394 | Howard, Lorna Agent | | Oil & Gas Operator | Dec 2021 |
| 1395 | Howard, Patrick M. | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 1396 | Howard, Terry | Cherry Creek, NY 14723 | Gas Operator | Dec 2024 |
| 1397 | Howco Oil And Gas | Stroud, OK 74079-9604 | Oil & Gas Operator | Mar 2015 |
| 1398 | Howden Petroleum Corp | Wetumka, OK 74883 | Gas Operator | Nov 1997 |
| 1399 | Howdyshell Pumping Inc | Logan, OH 43138 | Oil Operator | Dec 2024 |
| 1400 | Howe, Thomas L. | Hunt, NY 14846 | Gas Operator | Dec 2024 |