| 1301 | Argali Exploration Company | | Oil & Gas Operator | Aug 2025 |
| 1302 | Argali Resources | Dallas, TX 75206 | Oil & Gas Operator | Apr 2003 |
| 1303 | Argas Incorporat | | Oil & Gas Operator | Aug 1995 |
| 1304 | Argee Oil Company | Midland, TX 79702 | Gas Operator | May 1994 |
| 1305 | Argent Energy (Us) Holdings Inc. | Sugar Land, TX 77479 | Oil & Gas Operator | Sep 2021 |
| 1306 | Argent Energy In | | Oil Operator | Feb 1994 |
| 1307 | Argent Energy, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2019 |
| 1308 | Argent Petroleum Corporation | Center, TX 75935 | Oil & Gas Operator | Sep 2026 |
| 1309 | Argo Petroleum Corp. | | Oil & Gas Operator | Dec 1989 |
| 1310 | Argonaut Energy | | Oil & Gas Operator | Aug 1991 |
| 1311 | Argonex Company LLC | | Oil & Gas Operator | Jan 2024 |
| 1312 | Argos Properties, Inc. | | Oil & Gas Operator | Apr 1992 |
| 1313 | Argosy | Carrollton, TX 75010 | Oil & Gas Operator | Aug 2003 |
| 1314 | Argosy Oil Company | | Gas Operator | Dec 1999 |
| 1315 | Argus Drilling, LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 1316 | Argus Production Company | Dallas, TX 75382 | Oil & Gas Operator | Nov 2023 |
| 1317 | Aria Operating, LLC | | Oil Operator | Jun 2026 |
| 1318 | Arica Energy Company | Beggs, OK 74421 | Oil Operator | Jun 1994 |
| 1319 | Ariel Resources, Inc. | Dallas, TX 75287 | Oil & Gas Operator | May 1997 |
| 1320 | Aries Exploration Co Inc | Maud, OK 74854-0160 | Oil & Gas Operator | May 2013 |
| 1321 | Aries Oil & Gas Company, Inc. | | Oil Operator | Dec 1986 |
| 1322 | Aries Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Feb 2009 |
| 1323 | Aries Operating, LP | Houston, TX 77042 | Oil & Gas Operator | Sep 2026 |
| 1324 | Aries Petroleum Corp. | Big Springs, WV 26137 | Oil & Gas Operator | Dec 2021 |
| 1325 | Arista Novelty, Inc. | Houston, TX 77256 | Oil & Gas Operator | Feb 1995 |
| 1326 | Aristata Exploration Co. | | Gas Operator | Dec 2009 |
| 1327 | Arizona Oil Comp | | Oil Operator | Oct 1984 |
| 1328 | Ark Petroleum Inc. | Clyde, TX 79510 | Oil & Gas Operator | Nov 1997 |
| 1329 | Ark Resources Inc | Indiana, PA 15701-0069 | Oil & Gas Operator | Dec 2014 |
| 1330 | Ark Trust, Carol W Byrd Trustee | | Oil Operator | Oct 2025 |
| 1331 | Ark, Mary P. | Silver Creek, NY 14136 | Gas Operator | Dec 2025 |
| 1332 | Ark-La-Tex Anchor, Inc. | | Oil & Gas Operator | Mar 1999 |
| 1333 | Ark-La-Tex Energy Partners, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2013 |
| 1334 | Ark-La-Tex Energy, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 2026 |
| 1335 | Ark-La-Tex Gas Gathering Co | | Oil Operator | Mar 2000 |
| 1336 | Ark-La-Tex Production, LLC | Doddridge, AR 71834 | Oil Operator | Jan 2025 |
| 1337 | Arkana Operating Company Inc | Fort Worth, TX 76116-5707 | Oil & Gas Operator | Jul 2008 |
| 1338 | Arkies Well Service Inc | | Oil Operator | Aug 2009 |
| 1339 | Arkla Energy Resources | Shreveport, LA 71151 | Oil & Gas Operator | Mar 2015 |
| 1340 | Arkla Expl.Co & George E Woods | | Oil & Gas Operator | Dec 1992 |
| 1341 | Arkla Exploration Co. | Shreveport, LA 71151 | Oil & Gas Operator | Jan 1993 |
| 1342 | Arkla Petroleum LLC | | Oil & Gas Operator | May 2006 |
| 1343 | Arkland Producing Co., Inc. | Midland, TX 79701 | Oil & Gas Operator | Nov 2023 |
| 1344 | Arkland, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 1994 |
| 1345 | Arklatx Operating Company, Inc | Smackover, AR 71762 | Oil Operator | Jan 2025 |
| 1346 | Arkoma Gas Company | Edmond, OK 73003-5672 | Gas Operator | Apr 2010 |
| 1347 | Arkoma Holding Corporation | Oklahoma City, OK 73102-5684 | Gas Operator | Jul 2007 |
| 1348 | Arkoma Operations LLC | Tulsa, OK 74114-3502 | Oil & Gas Operator | Jun 2026 |
| 1349 | Arkoma Prod Co Of Texas, Inc. | Dallas, TX 75225 | Oil Operator | May 2004 |
| 1350 | Arkoma Production Company | Shreveport, LA 71101 | Gas Operator | Apr 2020 |
| 1351 | Arkoma Production Company Of California | | Oil & Gas Operator | Dec 1993 |
| 1352 | Arkoma Resources LLC | Henryetta, OK 74437 | Oil & Gas Operator | Jul 2026 |
| 1353 | Arkoma, Sandra | Pampa, TX 79066 | Oil & Gas Operator | May 1995 |
| 1354 | Arleand Resources | Overton, TX 75684 | Oil & Gas Operator | Sep 2026 |
| 1355 | Arledge & Young, Inc. | Weatherford, TX 76086 | Oil & Gas Operator | Feb 1999 |
| 1356 | Arledge, Terry | Rockdale, TX 76567 | Oil & Gas Operator | Sep 2019 |
| 1357 | Arlen Corporation | Houston, TX 77077 | Oil & Gas Operator | Mar 2008 |
| 1358 | Arlian, Inc. | Denver, CO 80202 | Oil Operator | Feb 1998 |
| 1359 | Arlis Scogin | | Oil Operator | Jul 1985 |
| 1360 | Arlis Scogin Et Al | | Oil & Gas Operator | Jan 1990 |
| 1361 | Armac Resources | Washington, PA 15301-0558 | Oil & Gas Operator | Dec 2011 |
| 1362 | Armac Resources LLC | Washington, PA 15301-0558 | Oil & Gas Operator | Dec 2025 |
| 1363 | Armada Operating, LLC | Dallas, TX 75254 | Oil Operator | Aug 2015 |
| 1364 | Armadilla Oil & Gas, LLC | Madison, KS 66860 | Oil Operator | Apr 2026 |
| 1365 | Armca Oil & Gas LLC | | Oil Operator | Jul 2026 |
| 1366 | Armidillo Oil Company | Luling, TX 78648 | Oil & Gas Operator | Sep 2026 |
| 1367 | Armitage Jerald Dba Jem Oilfield Services LLC | Bartlesville, OK 74003 | Oil Operator | Jul 2026 |
| 1368 | Armor Energy II LLC | Tulsa, OK 74145 | Oil & Gas Operator | Jul 2026 |
| 1369 | Armor Energy LLC | Tulsa, OK 74146 | Oil & Gas Operator | Jun 2022 |
| 1370 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2026 |
| 1371 | Armor SWD Inc | Oklahoma City, OK 73112 | Oil Operator | May 2020 |
| 1372 | Armour Resource Holdings, LTD. | Houston, TX 77046 | Oil & Gas Operator | Nov 1994 |
| 1373 | Armour, Widd | Graham, TX 76450 | Oil & Gas Operator | Sep 2026 |
| 1374 | Armstrong Energy Corp | Roswell, NM 88202 | Oil & Gas Operator | Jun 2026 |
| 1375 | Armstrong Gas Co LLC | Kittanning, PA 16201-2269 | Oil & Gas Operator | Dec 2018 |
| 1376 | Armstrong Oil Inc. | | Oil & Gas Operator | Dec 2020 |
| 1377 | Armstrong Operating, Inc. | Dickinson, ND 58602 | Oil & Gas Operator | Jun 2026 |
| 1378 | Armstrong Petroleum Corporation | | Oil & Gas Operator | Dec 2025 |
| 1379 | Armstrong Robert D | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2025 |
| 1380 | Arnaudville Company Inc. | | Oil & Gas Operator | Apr 1995 |
| 1381 | Arnett Saltwater Disposal LLC | Shattuck, OK 73858-0848 | Oil Operator | Dec 2021 |
| 1382 | Arnold & Assoc-D&D-Coquina | | Oil Operator | Oct 1985 |
| 1383 | Arnold N Krebbs | | Oil Operator | Jun 2026 |
| 1384 | Arnold Oil Properties, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2019 |
| 1385 | Arnold Oil Properties, L.L.C. | Nichols Hill, OK 73116 | Oil & Gas Operator | Sep 2026 |
| 1386 | Arnold Prodn. | | Oil & Gas Operator | Jan 2006 |
| 1387 | Arnold Ridge LLC | | Oil Operator | Dec 2023 |
| 1388 | Arnot Oil Company, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 2026 |
| 1389 | Arnot, W. G., Jr. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2017 |
| 1390 | Aroc (Texas) Inc. | Houston, TX 77090 | Oil & Gas Operator | Dec 2014 |
| 1391 | Arp Barnett, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2018 |
| 1392 | Arp Oklahoma LLC | Fort Worth, TX 76102-7426 | Oil & Gas Operator | Feb 2020 |
| 1393 | Arp Operating, LLC | Denver, CO 80202 | Oil Operator | May 2026 |
| 1394 | Arp Production Company, LLC | Fort Worth, TX 76102 | Gas Operator | Jun 2026 |
| 1395 | Arpel, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2014 |
| 1396 | Arps Petroleum C | | Oil Operator | Jul 1987 |
| 1397 | Array Operating, LLC | | Oil & Gas Operator | Mar 2017 |
| 1398 | Arrco Operating, LLC | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Sep 2026 |
| 1399 | Arrington CJM, Inc. | Canadian, TX 79014 | Oil & Gas Operator | Nov 2021 |
| 1400 | Arrington David Oil & Gas Inc | Midland, TX 79702-2071 | Oil & Gas Operator | Dec 2014 |