| 1301 | Arcady Oil Company | | Gas Operator | Dec 1989 |
| 1302 | Arcana Energy Corp Inc | Bartlesville, OK 74006 | Oil Operator | May 2017 |
| 1303 | Arch Bend Oil & Gas Operators, LLC | | Oil Operator | Jan 2025 |
| 1304 | Arch Oil & Gas, LLC | Dallas, TX 75254 | Oil & Gas Operator | May 2025 |
| 1305 | Arch Oil And Gas Company | Midland, TX 79702 | Oil & Gas Operator | Feb 1994 |
| 1306 | Arch Operating, LLC | Wichita Falls, TX 76308 | Oil Operator | May 2025 |
| 1307 | Arch Petroleum Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2008 |
| 1308 | Archer Drilling & Prod. Co. | Archer City, TX 76351 | Oil & Gas Operator | Nov 2002 |
| 1309 | Archer Operations California LLC | | Gas Operator | Feb 2025 |
| 1310 | Archer Petroleum | Frisco, TX 75034 | Oil & Gas Operator | Aug 2021 |
| 1311 | Archer Reef Oil Co. | Bellevue, TX 76228 | Oil & Gas Operator | May 2025 |
| 1312 | Archer, Carl M. | Spearman, TX 79081 | Oil & Gas Operator | Feb 2005 |
| 1313 | Archer, Carl M. Farms, Inc. | Gruver, TX 79040 | Gas Operator | Mar 2024 |
| 1314 | Archer,Carl M Estate Partnership | Gruver, TX 79040 | Oil & Gas Operator | Sep 2022 |
| 1315 | Archibald Oil & Gas Operating Inc | Ada, OK 74820 | Oil & Gas Operator | Mar 2025 |
| 1316 | Archon Resources LLC | Houston, TX 77074 | Oil & Gas Operator | Jan 2015 |
| 1317 | Arco Alaska Inc. | | Oil & Gas Operator | Dec 2000 |
| 1318 | Arco O & G Co-Div Atl Rich Co | | Oil & Gas Operator | Feb 1994 |
| 1319 | Arco Oil & Gas C | | Oil & Gas Operator | Dec 1992 |
| 1320 | Arco Oil & Gas Co., Div. Of Atlantic Richfield | | Oil & Gas Operator | Jul 1992 |
| 1321 | Arco Oil & Gas Co.-Silsbee | Lafayette, LA 70505 | Oil & Gas Operator | Jul 1993 |
| 1322 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 1323 | Arco Permian | Houston, TX 77079 | Oil & Gas Operator | Dec 2001 |
| 1324 | Arco Permian, A Div Of Atlantic Richfield Company | | Gas Operator | Dec 2001 |
| 1325 | Arco Western Energy Co. | | Oil & Gas Operator | Dec 1999 |
| 1326 | Arcooil Corp | San Antonio, TX 78205 | Oil & Gas Operator | May 2025 |
| 1327 | Arcotex Oil & Gas Inc | Gainesville, TX 76241-1357 | Oil & Gas Operator | Mar 2025 |
| 1328 | Arcturus Oil Cor | | Oil Operator | Oct 1989 |
| 1329 | Arcturus Operating Company | Addison, TX 75001 | Oil & Gas Operator | May 2025 |
| 1330 | Ard Drilling Company Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jun 2000 |
| 1331 | Ard, Julian | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2002 |
| 1332 | Ardale Natural Gas LLC | Ford City, PA 16226-7003 | Gas Operator | Dec 2023 |
| 1333 | Ardc Inc. | Hays, KS 67601 | Oil Operator | Jan 2025 |
| 1334 | Arden Energy Partners, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2013 |
| 1335 | Ardent Energy LLC | Edmond, OK 73083 | Oil & Gas Operator | May 2025 |
| 1336 | Ardent Resources, Inc. | Upper St Clair, PA 15241-1633 | Oil & Gas Operator | Dec 2018 |
| 1337 | Ardmore Production & Exploration Co | Ardmore, OK 73401 | Oil & Gas Operator | Feb 2025 |
| 1338 | Area Management Corp | Prairie VIllage, KS 66207 | Oil Operator | Dec 2019 |
| 1339 | Area Pipe And Equipment | Midland, TX 79702 | Oil & Gas Operator | Apr 2003 |
| 1340 | Arena Offshore, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Mar 2009 |
| 1341 | Arena Production Company | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 1342 | Arena Resources Inc | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 1343 | Arena Resources LLC | Longview, TX 75608 | Oil & Gas Operator | Mar 2025 |
| 1344 | Ares Energy, LTD. | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 1345 | Arete Operating Company II, LLC | San Antonio, TX 78260 | Oil & Gas Operator | May 2025 |
| 1346 | Arete Operating Company III, LLC | San Antonio, TX 78260 | Oil & Gas Operator | May 2025 |
| 1347 | Arete Operating Company, LLC | San Antonio, TX 78260 | Oil & Gas Operator | May 2025 |
| 1348 | Arg Resources Inc | Kane, PA 16735-6405 | Oil & Gas Operator | Dec 2019 |
| 1349 | Argali Exploration Company | | Gas Operator | Dec 2024 |
| 1350 | Argali Resources | Dallas, TX 75206 | Oil & Gas Operator | Apr 2003 |
| 1351 | Argas Incorporat | | Oil & Gas Operator | Aug 1995 |
| 1352 | Argent Energy (Us) Holdings Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Sep 2021 |
| 1353 | Argent Energy In | | Oil Operator | Feb 1994 |
| 1354 | Argent Energy, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2019 |
| 1355 | Argent Petroleum Corporation | Center, TX 75935 | Oil & Gas Operator | May 2025 |
| 1356 | Argentia Operating Company | | Oil Operator | Oct 1991 |
| 1357 | Argo Energy Corp | Gray, KY 40734 | Gas Operator | Dec 2019 |
| 1358 | Argo Petroleum Corporation | | Oil & Gas Operator | Dec 1989 |
| 1359 | Argonaut Energy | | Oil & Gas Operator | Aug 1991 |
| 1360 | Argonex Company LLC | | Oil & Gas Operator | Jan 2024 |
| 1361 | Argos Properties, Inc. | | Oil & Gas Operator | Apr 1992 |
| 1362 | Argosy | Carrollton, TX 75010 | Oil & Gas Operator | Aug 2003 |
| 1363 | Argosy Oil Company | | Gas Operator | Dec 1999 |
| 1364 | Argus Drilling, LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 1365 | Argus Production Company | Dallas, TX 75382 | Oil & Gas Operator | Nov 2023 |
| 1366 | Aria Operating LLC | | Oil Operator | Feb 2025 |
| 1367 | Arica Energy Company | Beggs, OK 74421 | Oil Operator | Jun 1994 |
| 1368 | Ariel Resources, Inc. | Dallas, TX 75287 | Oil & Gas Operator | May 1997 |
| 1369 | Aries Exploration Co Inc | Maud, OK 74854-0160 | Oil & Gas Operator | May 2013 |
| 1370 | Aries Oil & Gas Company, Inc. | | Oil Operator | Dec 1986 |
| 1371 | Aries Operating LP | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 1372 | Aries Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Feb 2010 |
| 1373 | Aries Petroleum Corp. | Big Springs, WV 26137 | Oil & Gas Operator | Dec 2021 |
| 1374 | Arista Novelty, Inc. | Houston, TX 77256 | Oil & Gas Operator | Feb 1995 |
| 1375 | Aristata Exploration Co. | | Gas Operator | Dec 2009 |
| 1376 | Arizona Oil Comp | | Oil Operator | Oct 1984 |
| 1377 | Arjay Oil Company | Salt Lake City, UT 84110 | Oil & Gas Operator | May 2000 |
| 1378 | Ark Petroleum Inc. | Clyde, TX 79510 | Oil & Gas Operator | Nov 1997 |
| 1379 | Ark Resources Inc | Indiana, PA 15701-0069 | Oil & Gas Operator | Dec 2014 |
| 1380 | Ark Trust, Carol W Byrd Trustee | | Oil Operator | Apr 2025 |
| 1381 | Ark, Mary P. | Silver Creek, NY 14136 | Gas Operator | Dec 2023 |
| 1382 | Ark-La-Tex Anchor, Inc. | | Oil & Gas Operator | Mar 1999 |
| 1383 | Ark-La-Tex Energy Partners, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2013 |
| 1384 | Ark-La-Tex Energy, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | May 2025 |
| 1385 | Ark-La-Tex Gas Gathering Co | | Oil Operator | Mar 2000 |
| 1386 | Ark-La-Tex Production, LLC | Doddridge, AR 71834 | Oil Operator | Jan 2025 |
| 1387 | Arkana Operating Company, Inc | Fort Worth, TX 76116-5707 | Oil & Gas Operator | Jul 2008 |
| 1388 | Arkies Well Service Inc | | Oil Operator | Aug 2009 |
| 1389 | Arkla Energy Resources | Shreveport, LA 71151 | Oil & Gas Operator | Mar 2015 |
| 1390 | Arkla Expl.Co & George E Woods | | Oil & Gas Operator | Dec 1992 |
| 1391 | Arkla Exploration Co. | Shreveport, LA 71151 | Oil & Gas Operator | Jan 1993 |
| 1392 | Arkla Petroleum LLC | | Oil & Gas Operator | May 2006 |
| 1393 | Arkland Producing Co Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2023 |
| 1394 | Arkland, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 1994 |
| 1395 | Arklatx Operating Company, Inc | Smackover, AR 71762 | Oil Operator | Jan 2025 |
| 1396 | Arkoma Gas Company | Edmond, OK 73003-5672 | Gas Operator | Apr 2010 |
| 1397 | Arkoma Holding Corporation | Oklahoma City, OK 73102-5684 | Gas Operator | Jul 2007 |
| 1398 | Arkoma Operations LLC | Tulsa, OK 74114-3502 | Oil & Gas Operator | Feb 2025 |
| 1399 | Arkoma Prod Co Of Texas, Inc. | Dallas, TX 75225 | Oil Operator | May 2004 |
| 1400 | Arkoma Production Company | Shreveport, LA 71101 | Gas Operator | Apr 2020 |