| 1301 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 1302 | Arco Permian | Houston, TX 77079 | Oil & Gas Operator | Dec 2001 |
| 1303 | Arco Western Energy Co. | | Oil & Gas Operator | Dec 1999 |
| 1304 | Arcooil Corp | San Antonio, TX 78205 | Oil & Gas Operator | May 2026 |
| 1305 | Arcotex Oil & Gas Inc | Gainesville, TX 76241-1357 | Oil & Gas Operator | Feb 2026 |
| 1306 | Arcturus Oil Cor | | Oil Operator | Oct 1989 |
| 1307 | Arcturus Operating Company | Addison, TX 75001 | Oil & Gas Operator | May 2026 |
| 1308 | Ard Drilling Company Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jun 2000 |
| 1309 | Ard, Julian | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2002 |
| 1310 | Ardale Natural Gas LLC | Ford City, PA 16226-7003 | Gas Operator | Dec 2023 |
| 1311 | Ardc Inc. | Hays, KS 67601 | Oil Operator | Dec 2025 |
| 1312 | Arden Energy Partners, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2013 |
| 1313 | Ardent Energy LLC | Edmond, OK 73083 | Oil & Gas Operator | May 2026 |
| 1314 | Ardent Resources, Inc. | Upper St Clair, PA 15241-1633 | Oil & Gas Operator | Dec 2018 |
| 1315 | Ardmore Production & Exploration Co | Ardmore, OK 73401 | Oil & Gas Operator | Jan 2026 |
| 1316 | Area Management Corp | Prairie VIllage, KS 66207 | Oil Operator | Dec 2019 |
| 1317 | Area Pipe And Equipment | Midland, TX 79702 | Oil & Gas Operator | Apr 2003 |
| 1318 | Arena Offshore, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Mar 2009 |
| 1319 | Arena Production Company | Midland, TX 79710 | Oil & Gas Operator | May 2026 |
| 1320 | Arena Resources Inc | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 1321 | Arena Resources LLC | Longview, TX 75608 | Oil & Gas Operator | Feb 2026 |
| 1322 | Ares Energy, LTD. | Midland, TX 79701 | Oil & Gas Operator | May 2026 |
| 1323 | Arete Creek Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | May 2026 |
| 1324 | Arete Operating Company II, LLC | San Antonio, TX 78260 | Oil & Gas Operator | May 2026 |
| 1325 | Arete Operating Company III, LLC | San Antonio, TX 78260 | Oil & Gas Operator | May 2026 |
| 1326 | Arete Operating Company, LLC | San Antonio, TX 78260 | Oil & Gas Operator | May 2026 |
| 1327 | Arg Resources Inc | Kane, PA 16735-6405 | Oil & Gas Operator | Dec 2019 |
| 1328 | Argali Exploration Company | | Oil & Gas Operator | Aug 2025 |
| 1329 | Argali Resources | Dallas, TX 75206 | Oil & Gas Operator | Apr 2003 |
| 1330 | Argas Incorporat | | Oil & Gas Operator | Aug 1995 |
| 1331 | Argee Oil Company | Midland, TX 79702 | Gas Operator | May 1994 |
| 1332 | Argent Energy (Us) Holdings Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Sep 2021 |
| 1333 | Argent Energy In | | Oil Operator | Feb 1994 |
| 1334 | Argent Energy, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2019 |
| 1335 | Argent Petroleum Corporation | Center, TX 75935 | Oil & Gas Operator | May 2026 |
| 1336 | Argentia Operating Company | | Oil Operator | Oct 1991 |
| 1337 | Argo Petroleum Corporation | | Oil & Gas Operator | Dec 1989 |
| 1338 | Argonaut Energy | | Oil & Gas Operator | Aug 1991 |
| 1339 | Argonex Company LLC | | Oil & Gas Operator | Jan 2024 |
| 1340 | Argos Properties, Inc. | | Oil & Gas Operator | Apr 1992 |
| 1341 | Argosy | Carrollton, TX 75010 | Oil & Gas Operator | Aug 2003 |
| 1342 | Argosy Oil Company | | Gas Operator | Dec 1999 |
| 1343 | Argus Drilling, LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 1344 | Argus Production Company | Dallas, TX 75382 | Oil & Gas Operator | Nov 2023 |
| 1345 | Aria Operating, LLC | | Oil Operator | Jan 2026 |
| 1346 | Arica Energy Company | Beggs, OK 74421 | Oil Operator | Jun 1994 |
| 1347 | Ariel Resources, Inc. | Dallas, TX 75287 | Oil & Gas Operator | May 1997 |
| 1348 | Aries Exploration Co Inc | Maud, OK 74854-0160 | Oil & Gas Operator | May 2013 |
| 1349 | Aries Oil & Gas Company, Inc. | | Oil Operator | Dec 1986 |
| 1350 | Aries Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Feb 2009 |
| 1351 | Aries Operating, LP | Houston, TX 77042 | Oil & Gas Operator | May 2026 |
| 1352 | Aries Petroleum Corp. | Big Springs, WV 26137 | Oil & Gas Operator | Dec 2021 |
| 1353 | Arista Novelty, Inc. | Houston, TX 77256 | Oil & Gas Operator | Feb 1995 |
| 1354 | Aristata Exploration Co. | | Gas Operator | Dec 2009 |
| 1355 | Arizona Oil Comp | | Oil Operator | Oct 1984 |
| 1356 | Arjay Oil Company | Salt Lake City, UT 84110 | Oil & Gas Operator | May 2000 |
| 1357 | Ark Petroleum Inc. | Clyde, TX 79510 | Oil & Gas Operator | Nov 1997 |
| 1358 | Ark Resources Inc | Indiana, PA 15701-0069 | Oil & Gas Operator | Dec 2014 |
| 1359 | Ark Trust, Carol W Byrd Trustee | | Oil Operator | Jan 2026 |
| 1360 | Ark, Mary P. | Silver Creek, NY 14136 | Gas Operator | Dec 2024 |
| 1361 | Ark-La-Tex Anchor, Inc. | | Oil & Gas Operator | Mar 1999 |
| 1362 | Ark-La-Tex Energy Partners, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2013 |
| 1363 | Ark-La-Tex Energy, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | May 2026 |
| 1364 | Ark-La-Tex Gas Gathering Co | | Oil Operator | Mar 2000 |
| 1365 | Ark-La-Tex Production, LLC | Doddridge, AR 71834 | Oil Operator | Jan 2025 |
| 1366 | Arkana Operating Company Inc | Fort Worth, TX 76116-5707 | Oil & Gas Operator | Jul 2008 |
| 1367 | Arkies Well Service Inc | | Oil Operator | Aug 2009 |
| 1368 | Arkla Energy Resources | Shreveport, LA 71151 | Oil & Gas Operator | Mar 2015 |
| 1369 | Arkla Expl.Co & George E Woods | | Oil & Gas Operator | Dec 1992 |
| 1370 | Arkla Exploration Co. | Shreveport, LA 71151 | Oil & Gas Operator | Jan 1993 |
| 1371 | Arkla Petroleum LLC | | Oil & Gas Operator | May 2006 |
| 1372 | Arkland Producing Co Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2023 |
| 1373 | Arkland, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 1994 |
| 1374 | Arklatx Operating Company, Inc | Smackover, AR 71762 | Oil Operator | Jan 2025 |
| 1375 | Arkoma Gas Company | Edmond, OK 73003-5672 | Gas Operator | Apr 2010 |
| 1376 | Arkoma Holding Corporation | Oklahoma City, OK 73102-5684 | Gas Operator | Jul 2007 |
| 1377 | Arkoma Operations LLC | Tulsa, OK 74114-3502 | Oil & Gas Operator | Jan 2026 |
| 1378 | Arkoma Prod Co Of Texas, Inc. | Dallas, TX 75225 | Oil Operator | May 2004 |
| 1379 | Arkoma Production Company | Shreveport, LA 71101 | Gas Operator | Apr 2020 |
| 1380 | Arkoma Production Company Of California | | Oil & Gas Operator | Dec 1993 |
| 1381 | Arkoma Resources LLC | Henryetta, OK 74437 | Oil & Gas Operator | Feb 2026 |
| 1382 | Arkoma, Sandra | Pampa, TX 79066 | Oil & Gas Operator | May 1995 |
| 1383 | Arleand Resources | Overton, TX 75684 | Oil & Gas Operator | May 2026 |
| 1384 | Arledge & Young, Inc. | Weatherford, TX 76086 | Oil & Gas Operator | Feb 1999 |
| 1385 | Arledge, Terry | Rockdale, TX 76567 | Oil & Gas Operator | Sep 2019 |
| 1386 | Arlen Corporation | Houston, TX 77077 | Oil & Gas Operator | Mar 2008 |
| 1387 | Arlian, Inc. | Denver, CO 80202 | Oil Operator | Feb 1998 |
| 1388 | Arlis Scogin | | Oil Operator | Jul 1985 |
| 1389 | Arlis Scogin Et Al | | Oil & Gas Operator | Jan 1990 |
| 1390 | Armac Resources | Washington, PA 15301-0558 | Oil & Gas Operator | Dec 2011 |
| 1391 | Armac Resources LLC | Washington, PA 15301-0558 | Oil & Gas Operator | Dec 2025 |
| 1392 | Armada Operating, LLC | Dallas, TX 75254 | Oil Operator | Aug 2015 |
| 1393 | Armadilla Oil & Gas, LLC | Madison, KS 66860 | Oil Operator | Nov 2025 |
| 1394 | Armca Oil & Gas LLC | | Oil Operator | Mar 2026 |
| 1395 | Armidillo Oil Company | Luling, TX 78648 | Oil & Gas Operator | May 2026 |
| 1396 | Armitage Jerald Dba Jem Oilfield Services LLC | Bartlesville, OK 74003 | Oil Operator | Feb 2026 |
| 1397 | Armor Energy II LLC | Tulsa, OK 74145 | Oil & Gas Operator | Feb 2026 |
| 1398 | Armor Energy LLC | Tulsa, OK 74146 | Oil & Gas Operator | Jun 2022 |
| 1399 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2026 |
| 1400 | Armor SWD Inc | Oklahoma City, OK 73112 | Oil Operator | May 2020 |