| 1301 | Black Stone Energy Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2004 |
| 1302 | Black Stone Energy Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 1303 | Black Stone Oil Company | Dallas, TX 75244 | Oil & Gas Operator | Feb 1997 |
| 1304 | Black Stone Petroleum LLC | Wichita, KS 67206 | Oil Operator | Jul 2019 |
| 1305 | Black Strata LLC | Weatherford, TX 76086 | Oil Operator | Feb 2026 |
| 1306 | Black Swan Opco, LLC | Edmond, OK 73013 | Oil & Gas Operator | Feb 2026 |
| 1307 | Black Swan Operating, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2023 |
| 1308 | Black Tea Oil, LLC | Wichita, KS 67206 | Oil Operator | Sep 2025 |
| 1309 | Black Thunder Oil LLC | Gillette, WY 82717 | Oil & Gas Operator | Sep 2025 |
| 1310 | Black Top Operating, LLC | Midland, TX 79706 | Oil & Gas Operator | Feb 2026 |
| 1311 | Black Velvet Petro. Co. | | Oil & Gas Operator | Dec 2007 |
| 1312 | Black W K Incorp | | Oil & Gas Operator | Sep 1991 |
| 1313 | Black W K Produc | | Oil & Gas Operator | Aug 1991 |
| 1314 | Black Warrior Methane Corp. | | Gas Operator | Oct 2025 |
| 1315 | Black Wendell D | Atwood, OK 74827-9706 | Oil & Gas Operator | Jan 2009 |
| 1316 | Black'S Oil & Gas | Borger, TX 79008 | Oil & Gas Operator | Feb 2026 |
| 1317 | Black, Frank J., Oil Operations, Inc. | Overland Park, KS 66213 | Oil & Gas Operator | Dec 2009 |
| 1318 | Black, Karl T. | Paradise, TX 76073 | Oil & Gas Operator | Aug 2003 |
| 1319 | Black-Travis, Inc. | Paola, KS 66071 | Oil Operator | Sep 2025 |
| 1320 | Blackbeard Operating East LLC | Midland, TX 79701-4532 | Oil & Gas Operator | Dec 2020 |
| 1321 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Feb 2026 |
| 1322 | Blackberry Oil Company | Jennings, OK 74038-0068 | Oil & Gas Operator | Dec 2002 |
| 1323 | Blackbird Company | Shreveport, LA 71106 | Oil & Gas Operator | Jan 2025 |
| 1324 | Blackbird Oil Co. | Great Bend, KS 67530 | Oil Operator | Feb 1996 |
| 1325 | Blackbird R 22 Og L.L.C. | Eastland, TX 76448 | Gas Operator | Feb 2026 |
| 1326 | Blackbrush O & G, Inc. | San Antonio, TX 78258 | Oil & Gas Operator | Apr 2012 |
| 1327 | Blackbrush O & G, LLC | San Antonio, TX 78259 | Oil & Gas Operator | Feb 2026 |
| 1328 | Blackburn Oil & Gas, Inc. | Kinsley, KS 67547 | Oil & Gas Operator | Sep 2004 |
| 1329 | Blackburn Operating Co., Inc. | | Oil & Gas Operator | Jun 2008 |
| 1330 | Blackcat Oil Company | Glencoe, OK 74032 | Oil & Gas Operator | Nov 2025 |
| 1331 | Blackfire Operating LLC | Oklahoma City, OK 73116-4223 | Oil & Gas Operator | Nov 2025 |
| 1332 | Blackflat Oil Company LLC | Lubbock, TX 79424 | Oil Operator | Feb 2026 |
| 1333 | Blackhawk Energy | | Oil Operator | Dec 1993 |
| 1334 | Blackhawk Energy LLC | Greenville, KY 42345 | Oil & Gas Operator | Jan 2024 |
| 1335 | Blackhawk Explor | | Oil Operator | Jan 1990 |
| 1336 | Blackhawk Exploration, Inc. | Wichita, KS 67214 | Oil & Gas Operator | May 2020 |
| 1337 | Blackhawk Oil Co | Ottawa, KS 66067 | Oil & Gas Operator | Jan 2011 |
| 1338 | Blackhawk Production Company | | Oil Operator | Sep 2025 |
| 1339 | Blackhill Energy LLC | Canonsburg, PA 15317 | Gas Operator | Nov 2025 |
| 1340 | Blackhorn USA, LLC | Edwardsville, IL 62025 | Oil Operator | Dec 2023 |
| 1341 | Blackhorse Energy, LLC Of Texas | | Oil Operator | Jan 2025 |
| 1342 | Blackjack Creek LLC | Edmond, OK 73034-4195 | Oil & Gas Operator | Aug 2019 |
| 1343 | Blackjack Extraction LLC | Austin, TX 78731 | Oil Operator | Feb 2026 |
| 1344 | Blackjack Oak Production,LLC | | Oil Operator | Oct 2025 |
| 1345 | Blackjack Oil & Gas, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2026 |
| 1346 | Blackjack Oil LTD | Denver, CO 80223 | Oil Operator | May 1996 |
| 1347 | Blackjack Oil, Inc. | Las Vegas, NV 89128 | Oil & Gas Operator | Nov 2019 |
| 1348 | Blackjack Operating L. L. C. | Cibolo, TX 78108 | Oil & Gas Operator | Feb 2026 |
| 1349 | Blackjack Supply Company | Edmond, OK 73013-1144 | Oil & Gas Operator | May 2012 |
| 1350 | Blackland Oil & Gas | Portland, TX 78374 | Oil & Gas Operator | Aug 1997 |
| 1351 | Blackmar, Jim Oil Operator | Luling, TX 78648 | Oil & Gas Operator | Jan 2021 |
| 1352 | Blackmun Family Partners, L.P. | Dallas, TX 75206 | Oil & Gas Operator | Feb 2026 |
| 1353 | Blackridge Resource Partners LLC | Lexington, KY 40507 | Oil & Gas Operator | Dec 2022 |
| 1354 | Blackrock Drilling, LLC | Abilene, TX 79606 | Oil Operator | Feb 2026 |
| 1355 | Blackrock Energy Corp | | Oil & Gas Operator | Nov 2025 |
| 1356 | Blackrock Energy LLC | Wagoner, OK 74467 | Oil Operator | Apr 2025 |
| 1357 | Blackrock Enterprises, LLC | Salem, WV 26426 | Oil & Gas Operator | Dec 2021 |
| 1358 | Blackrock Operating, LLC | Tuscola, TX 79562 | Oil & Gas Operator | Feb 2026 |
| 1359 | Blackshear, Charley | Winters, TX 79567 | Oil & Gas Operator | Oct 1998 |
| 1360 | Blackstock Petroleum Co | Tulsa, OK 74136-4940 | Oil & Gas Operator | Oct 1994 |
| 1361 | Blackstone Drill | | Oil & Gas Operator | Jan 1989 |
| 1362 | Blackstone Drilling, Inc. | McPherson, KS 67460 | Gas Operator | Nov 2011 |
| 1363 | Blackstone Energy Services LLC | Christoval, TX 76935 | Oil & Gas Operator | Feb 2026 |
| 1364 | Blackstone Operating | Red Lodge, MT 59068 | Gas Operator | Dec 2006 |
| 1365 | Blackstone Operating Inc | Red Lodge, MT 59068 | Gas Operator | Nov 2009 |
| 1366 | Blackwater Oil & Gas Corporation | Colleyville, TX 76034 | Oil & Gas Operator | May 2018 |
| 1367 | Blackwelder Oil | MC Camey, TX 79752 | Oil Operator | Feb 2026 |
| 1368 | Blackwell BMC, LLC | Dallas, TX 75204 | Oil & Gas Operator | Jan 2022 |
| 1369 | Blackwell BMC, LP | Dallas, TX 75252 | Oil & Gas Operator | Mar 2007 |
| 1370 | Blackwell Drilling Co. | Cameron, TX 76520 | Oil & Gas Operator | Nov 2004 |
| 1371 | Blackwell Exp & Development, LLC | Dallas, TX 75252 | Oil & Gas Operator | Nov 2023 |
| 1372 | Blackwell Exploration & Development LLC | Dallas, TX 75252-5637 | Oil & Gas Operator | Jan 2024 |
| 1373 | Blackwell Gas Company | | Gas Operator | Jun 1997 |
| 1374 | Blackwell Operating Company | Houston, TX 77227 | Oil & Gas Operator | Jun 2007 |
| 1375 | Blackwell Operating LLC | Andrews, TX 79714 | Oil & Gas Operator | May 2025 |
| 1376 | Blackwood & Nichols LTD PTR | Oklahoma City, OK 73102 | Oil & Gas Operator | Aug 1996 |
| 1377 | Blade Oil Co. | Borger, TX 79007 | Oil & Gas Operator | Jun 1994 |
| 1378 | Blaik Oil Company | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2009 |
| 1379 | Blair Bill Inc | New Springfield, OH 44443 | Oil & Gas Operator | Dec 1994 |
| 1380 | Blair Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2011 |
| 1381 | Blair H H Oil Co | | Oil Operator | Feb 1988 |
| 1382 | Blair Harold L | Petrolia, PA 16050-1809 | Oil & Gas Operator | Dec 2020 |
| 1383 | Blair Oil Company | Kingfisher, OK 73750-1213 | Oil & Gas Operator | Nov 2025 |
| 1384 | Blair Raymond L SR | Kittanning, PA 16201-4957 | Oil & Gas Operator | Dec 2024 |
| 1385 | Blair, Jack N. | Midland, TX 79702 | Oil & Gas Operator | May 1996 |
| 1386 | Blair, R. W. | FT Stockton, TX 79735 | Oil & Gas Operator | Dec 2009 |
| 1387 | Blair, W Lynn | Lewisburg, KY 42256 | Oil & Gas Operator | Dec 2022 |
| 1388 | Blake Exploration | Hays, KS 67601 | Oil Operator | Oct 2007 |
| 1389 | Blake Exploration, LLC | Bogue, KS 67625 | Oil Operator | Sep 2025 |
| 1390 | Blake Oil & Gas Corporation | Midland, TX 79701 | Oil & Gas Operator | May 2004 |
| 1391 | Blake Production Company, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2026 |
| 1392 | Blake Production LLC | Gillette, WY 82717 | Oil & Gas Operator | Oct 2025 |
| 1393 | Blakely Land & Exploration Co. | | Oil & Gas Operator | Apr 1991 |
| 1394 | Blakemore Oil & Gas In Okla | Allen, TX 75002-5008 | Oil Operator | Aug 2013 |
| 1395 | Blakemore, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Dec 2012 |
| 1396 | Blakenergy Operating, LLC | Spring, TX 77386 | Oil & Gas Operator | Feb 2026 |
| 1397 | Blalack, James William | Schertz, TX 78154 | Oil & Gas Operator | Feb 2026 |
| 1398 | Blanchard Henry | Tupelo, OK 74572 | Oil & Gas Operator | Mar 2023 |
| 1399 | Blanchard, James R. | Paola, KS 66071 | Oil Operator | Nov 2015 |
| 1400 | Blanchard, Joe, Jr. | Houma, LA 70360 | Oil Operator | Sep 1989 |