| 1301 | Blackhawk Explor | | Oil Operator | Jan 1990 |
| 1302 | Blackhawk Exploration, Inc. | Wichita, KS 67214 | Oil & Gas Operator | May 2020 |
| 1303 | Blackhawk Oil Co | Ottawa, KS 66067 | Oil & Gas Operator | Jan 2011 |
| 1304 | Blackhawk Production Company | | Oil Operator | Apr 2026 |
| 1305 | Blackhill Energy LLC | Canonsburg, PA 15317 | Gas Operator | May 2026 |
| 1306 | Blackhorn USA, LLC | Edwardsville, IL 62025 | Oil Operator | Dec 2024 |
| 1307 | Blackhorse Energy, LLC Of Texas | | Oil Operator | Jan 2025 |
| 1308 | Blackjack Extraction LLC | Woodson, TX 76491 | Oil Operator | Aug 2026 |
| 1309 | Blackjack Oak Production, LLC | | Oil Operator | Mar 2026 |
| 1310 | Blackjack Oil & Gas, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Aug 2026 |
| 1311 | Blackjack Oil LTD | Denver, CO 80223 | Oil Operator | May 1996 |
| 1312 | Blackjack Oil, Inc. | Las Vegas, NV 89128 | Oil & Gas Operator | Nov 2019 |
| 1313 | Blackjack Operating L. L. C. | Cibolo, TX 78108 | Oil & Gas Operator | Aug 2026 |
| 1314 | Blackjack Supply Company | Edmond, OK 73013-1144 | Oil & Gas Operator | May 2012 |
| 1315 | Blackland Oil & Gas | Portland, TX 78374 | Oil & Gas Operator | Aug 1997 |
| 1316 | Blackmar, Jim Oil Operator | Luling, TX 78648 | Oil & Gas Operator | Jan 2021 |
| 1317 | Blackmun Family Partners, L.P. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2026 |
| 1318 | Blackridge Resource Partners LLC | Lexington, KY 40507 | Oil & Gas Operator | Dec 2024 |
| 1319 | Blackrock Drilling, LLC | Abilene, TX 79606 | Oil Operator | Aug 2026 |
| 1320 | Blackrock Energy Corp | | Oil & Gas Operator | May 2026 |
| 1321 | Blackrock Energy LLC | Wagoner, OK 74467 | Oil Operator | Apr 2025 |
| 1322 | Blackrock Enterprises, LLC | Salem, WV 26426 | Oil & Gas Operator | Dec 2021 |
| 1323 | Blackrock Operating, LLC | Tuscola, TX 79562 | Oil & Gas Operator | Aug 2026 |
| 1324 | Blackshear, Charley | Winters, TX 79567 | Oil & Gas Operator | Oct 1998 |
| 1325 | Blackstock Petroleum Co | Tulsa, OK 74136-4940 | Oil & Gas Operator | Oct 1994 |
| 1326 | Blackstone Drill | | Oil & Gas Operator | Jan 1989 |
| 1327 | Blackstone Drilling, Inc. | McPherson, KS 67460 | Gas Operator | Nov 2011 |
| 1328 | Blackstone Energy Services LLC | Christoval, TX 76935 | Oil & Gas Operator | Aug 2026 |
| 1329 | Blackstone Operating | Red Lodge, MT 59068 | Gas Operator | Dec 2006 |
| 1330 | Blackstone Operating Inc | Red Lodge, MT 59068 | Gas Operator | Nov 2009 |
| 1331 | Blackwater Oil & Gas Corporation | Colleyville, TX 76034 | Oil & Gas Operator | May 2018 |
| 1332 | Blackwelder Oil | MC Camey, TX 79752 | Oil Operator | Aug 2026 |
| 1333 | Blackwell BMC, LLC | Dallas, TX 75204 | Oil & Gas Operator | Jan 2022 |
| 1334 | Blackwell BMC, LP | Dallas, TX 75252 | Oil & Gas Operator | Mar 2007 |
| 1335 | Blackwell Drilling Co. | Cameron, TX 76520 | Oil & Gas Operator | Nov 2004 |
| 1336 | Blackwell Exp & Development, LLC | Dallas, TX 75252 | Oil & Gas Operator | Nov 2023 |
| 1337 | Blackwell Exploration & Development LLC | Dallas, TX 75252-5637 | Oil & Gas Operator | Jan 2024 |
| 1338 | Blackwell Gas Company | | Gas Operator | Jun 1997 |
| 1339 | Blackwell Operating Company | Houston, TX 77227 | Oil & Gas Operator | Jun 2007 |
| 1340 | Blackwell Operating LLC | Andrews, TX 79714 | Oil & Gas Operator | May 2025 |
| 1341 | Blackwood & Nichols LTD PTR | Oklahoma City, OK 73102 | Oil & Gas Operator | Aug 1996 |
| 1342 | Blade Oil Co. | Borger, TX 79007 | Oil & Gas Operator | Jun 1994 |
| 1343 | Blaes, Philomena M | Cherryvale, KS 67335 | Oil Operator | Mar 2026 |
| 1344 | Blaik Oil Company | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2009 |
| 1345 | Blair Bill Inc | New Springfield, OH 44443 | Oil & Gas Operator | Dec 1994 |
| 1346 | Blair Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2011 |
| 1347 | Blair H H Oil Co | | Oil Operator | Feb 1988 |
| 1348 | Blair Harold L | Petrolia, PA 16050-1809 | Oil & Gas Operator | Dec 2020 |
| 1349 | Blair Oil Company | Kingfisher, OK 73750-1213 | Oil & Gas Operator | Apr 2026 |
| 1350 | Blair Raymond L SR | | Oil & Gas Operator | Dec 2025 |
| 1351 | Blair, Jack N. | Midland, TX 79702 | Oil & Gas Operator | May 1996 |
| 1352 | Blair, R. W. | FT Stockton, TX 79735 | Oil & Gas Operator | Dec 2009 |
| 1353 | Blair, W Lynn | Lewisburg, KY 42256 | Oil & Gas Operator | Dec 2022 |
| 1354 | Blake Exploration | Hays, KS 67601 | Oil Operator | Oct 2007 |
| 1355 | Blake Exploration, LLC | Bogue, KS 67625 | Oil Operator | Apr 2026 |
| 1356 | Blake Oil & Gas Corporation | Midland, TX 79701 | Oil & Gas Operator | May 2004 |
| 1357 | Blake Production Company, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2026 |
| 1358 | Blake Production LLC | Gillette, WY 82717 | Oil & Gas Operator | Mar 2026 |
| 1359 | Blakely Land & Exploration Co. | | Oil & Gas Operator | Apr 1991 |
| 1360 | Blakemore Oil & Gas In Okla | Allen, TX 75002-5008 | Oil Operator | Aug 2013 |
| 1361 | Blakemore, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Dec 2012 |
| 1362 | Blakenergy Operating, LLC | Spring, TX 77386 | Oil & Gas Operator | Aug 2026 |
| 1363 | Blalack, James William | Schertz, TX 78154 | Oil & Gas Operator | Aug 2026 |
| 1364 | Blanchard Henry | Tupelo, OK 74572 | Oil & Gas Operator | Mar 2023 |
| 1365 | Blanchard, James R. | Paola, KS 66071 | Oil Operator | Nov 2015 |
| 1366 | Blanchard, Joe, Jr. | Houma, LA 70360 | Oil Operator | Sep 1989 |
| 1367 | Blanco Engineering Inc. | Artesia, NM 88210 | Oil & Gas Operator | Feb 1997 |
| 1368 | Blanco Oil Co. | San Antonio, TX 78230 | Oil & Gas Operator | Feb 2004 |
| 1369 | Blanco Oil Co., Etal | | Oil Operator | Aug 1985 |
| 1370 | Blanford, Phillip | Sebree, KY 42455 | Oil Operator | Dec 2023 |
| 1371 | Blanke, Richard L. | Pavilion, NY 14525 | Gas Operator | Dec 2025 |
| 1372 | Blanton, James M. | Frankfort, KY 40621 | Gas Operator | Dec 2021 |
| 1373 | Blauser Energy Corporation | Marietta, OH 45750-6964 | Oil & Gas Operator | Dec 2018 |
| 1374 | Blaze Oil & Gas Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2024 |
| 1375 | Blazer Energy Corp. | Alexandria, VA 22314 | Oil & Gas Operator | Dec 2014 |
| 1376 | Blazer Resources, Inc. | Leesburg, TX 75451 | Oil & Gas Operator | Aug 2026 |
| 1377 | Blazer, John A. | Oak Grove, AR 72660 | Oil Operator | Oct 1995 |
| 1378 | BLB Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Apr 2026 |
| 1379 | Bledsco, Inc. | Holliday, TX 76366 | Oil Operator | Feb 2010 |
| 1380 | Bledsoe Partners, Inc. | Oklahoma City, OK 73120 | Oil & Gas Operator | Mar 1995 |
| 1381 | Bledsoe Petro Corporation | Dallas, TX 75201 | Oil & Gas Operator | Dec 2000 |
| 1382 | Bledsoe, R.K. Trust Oil Operator | Jourdanton, TX 78026 | Oil & Gas Operator | Aug 2026 |
| 1383 | Blessed Operating LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Apr 2026 |
| 1384 | Blessing Energy, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Aug 2026 |
| 1385 | Blevins Production LLC | Jacksboro, TX 76458 | Oil Operator | Aug 2026 |
| 1386 | Bligh Petroleum, Inc. | | Oil & Gas Operator | Jun 2004 |
| 1387 | Bliss Pet Corporation | Hobbs, NM BAD ADDR | Gas Operator | Nov 1995 |
| 1388 | BLM Black Gold Properties, LTD. | Decatur, TX 76234 | Oil & Gas Operator | Aug 2026 |
| 1389 | Block "T" Petroleum, Inc. | Tyler, TX 75707 | Oil & Gas Operator | Aug 2026 |
| 1390 | Block T Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | May 2026 |
| 1391 | Blocker Exploration Company | | Oil & Gas Operator | Apr 1983 |
| 1392 | Bloomer & Associates, Inc. | Lago VIsta, TX 78645 | Oil & Gas Operator | Jul 2002 |
| 1393 | Bloomer Well Ser | | Oil Operator | Mar 1995 |
| 1394 | Bloomer Well Service | | Oil Operator | Dec 2009 |
| 1395 | Bloomer, Don C. And Bessie L. Liv. Trust | Rantoul, KS 66079 | Oil Operator | Dec 2025 |
| 1396 | Bloomfield Partners II LLC | | Oil & Gas Operator | Dec 2005 |
| 1397 | Bloomingdale Oil LLC | | Oil Operator | Dec 2025 |
| 1398 | Bloxom, John Tom | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 2007 |
| 1399 | BLS Oil & Gas LLC | Dubois, PA 15801-0039 | Oil & Gas Operator | Dec 2025 |
| 1400 | BLS Production Co., Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2026 |