| 22301 | Pengo Producing Company | | Oil & Gas Operator | Mar 1987 |
| 22302 | Peninsula Group Inc | Peninsula, OH 44264 | Oil & Gas Operator | Dec 1991 |
| 22303 | Peninsula Open Space Trust | | Oil & Gas Operator | Dec 2008 |
| 22304 | Peninsular Oil & Gas Co | Ada, MI 49301-96-96 | Oil & Gas Operator | Dec 2001 |
| 22305 | Penn Exploration Corp. | | Gas Operator | Feb 1984 |
| 22306 | Penn Homa Oil & Gas Co | Edmond, OK 73083 | Oil & Gas Operator | Oct 2013 |
| 22307 | Penn Inc. | | Oil & Gas Operator | Dec 2004 |
| 22308 | Penn Production Company Inc | | Oil & Gas Operator | Nov 2014 |
| 22309 | Penn Resources, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Sep 1987 |
| 22310 | Penn VIew Exploration Inc | Blairsville, PA 15717-7961 | Oil & Gas Operator | Dec 2024 |
| 22311 | Penn VIrginia MC Operating Co LLC | Houston, TX 77084-7213 | Oil & Gas Operator | Jan 2025 |
| 22312 | Penn VIrginia Oil & Gas Corp | Houston, TX 77024 | Oil & Gas Operator | Dec 2023 |
| 22313 | Penn VIrginia Oil & Gas, L.P. | Houston, TX 77084 | Oil & Gas Operator | Nov 2022 |
| 22314 | Penn, G. R. Production Co. | McPherson, KS 67460 | Gas Operator | Nov 1997 |
| 22315 | Penn-Ohio Investment Corp. | New Philadelphi, OH 44663 | Oil & Gas Operator | Dec 2004 |
| 22316 | Pennaco Energy Incorporated | Gillette, WY 82718 | Oil & Gas Operator | Feb 2021 |
| 22317 | Pennant Dev. And Prod., LLC | Midland, TX 79702 | Oil Operator | May 2025 |
| 22318 | Pennant Energy LLC | Oklahoma City, OK 73116 | Oil Operator | Dec 2024 |
| 22319 | Pennant Oil & Gas LLC | Oklahma City, OK 73159-6905 | Oil & Gas Operator | Jan 2024 |
| 22320 | Pennant Petroleum Corporation | | Oil Operator | Dec 2002 |
| 22321 | Pennartz Productions, LLC. | Jacksboro, TX 76458 | Oil Operator | May 2025 |
| 22322 | Penneco Exploration Company Of Wyo LLC | Delmont, PA 15626 | Oil Operator | Aug 2021 |
| 22323 | Penneco Oil Company, Inc. | Delmont, PA 15626-2408 | Oil & Gas Operator | Dec 2024 |
| 22324 | Pennenergy Resources LLC | Pittsburgh, PA 15275-1063-1063 | Oil & Gas Operator | Mar 2025 |
| 22325 | Penner Energy Inc | Oklahoma City, OK 73120-1930 | Oil & Gas Operator | Mar 2025 |
| 22326 | Pennfield Energy LLC | Erie, PA 16510-4760 | Oil & Gas Operator | Dec 2021 |
| 22327 | Pennhills Resources LLC | MT. Jewett, PA 16740 | Oil & Gas Operator | Mar 2025 |
| 22328 | Pennine Resc Inc | | Oil Operator | Sep 1992 |
| 22329 | Pennington Oil & Gas Int, LLC | | Oil & Gas Operator | Dec 2024 |
| 22330 | Pennington Operating Company, LLC | | Oil & Gas Operator | Jul 2020 |
| 22331 | Pennington Refining LLC | Grand Prairie, TX 75051 | Oil Operator | May 2025 |
| 22332 | Pennington, W. L., Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Jul 1996 |
| 22333 | Pennmark Resources Company | Edmond, OK 73013 | Oil & Gas Operator | Feb 2025 |
| 22334 | Penntex Petroleum Corporation | Austin, TX 78731 | Oil & Gas Operator | May 2025 |
| 22335 | Penntex Resources, L.P. | State College, PA 16803 | Oil & Gas Operator | Mar 2016 |
| 22336 | Penny, Ralph E. | White Plains, NY 10601 | Oil & Gas Operator | Jul 2023 |
| 22337 | Pennzenergy | Houston, TX 77252 | Oil & Gas Operator | Dec 1986 |
| 22338 | Pennzenergy Exp. & Prod., L.L.C. | Houston, TX 77210 | Oil & Gas Operator | Mar 2000 |
| 22339 | Pennzenergy Explor & Prod LLC | | Oil & Gas Operator | Dec 1999 |
| 22340 | Pennzenergy Exploration & Production LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2009 |
| 22341 | Pennzoil Company | Midland, TX 79710-0090 | Oil & Gas Operator | Mar 2000 |
| 22342 | Pennzoil E & P & M H Marr | | Oil & Gas Operator | Sep 1993 |
| 22343 | Pennzoil E & P Co - Arco | | Oil & Gas Operator | Dec 1993 |
| 22344 | Pennzoil E & P Co - Clark Oil | | Oil & Gas Operator | Apr 1980 |
| 22345 | Pennzoil E & P Co Et Al | | Oil & Gas Operator | Feb 1999 |
| 22346 | Pennzoil E & P Co-Sohio Et Al | | Oil & Gas Operator | Jun 1991 |
| 22347 | Pennzoil E & P Co-Sohio Petr | | Oil & Gas Operator | Feb 1999 |
| 22348 | Pennzoil Expl & Prod Co -TX | | Oil & Gas Operator | May 1993 |
| 22349 | Pennzoil Expl & Prod Co. -MS | | Oil Operator | Jan 1988 |
| 22350 | Pennzoil Explor & Prod Co | Houston, TX 77002 | Oil & Gas Operator | Mar 2000 |
| 22351 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 22352 | Pennzoil Petroleum Company | Houston, TX 77252 | Oil & Gas Operator | Nov 1999 |
| 22353 | Pennzoil Prod Co | Vienna, WV 26105-2141 | Oil & Gas Operator | Dec 2000 |
| 22354 | Pennzoil Producing Company | | Oil & Gas Operator | Oct 1992 |
| 22355 | Penroc Oil Corp. | Hobbs, NM 88241 | Oil & Gas Operator | Feb 2025 |
| 22356 | Penrod Oil Company Of Texas, Inc | Milano, TX 76556 | Oil & Gas Operator | May 2025 |
| 22357 | Pense Brothers Drilling | | Oil Operator | Dec 1998 |
| 22358 | Pentad Development Corp. (A) | Dallas, TX 75201 | Oil & Gas Operator | Mar 1993 |
| 22359 | Pentagon Petroleum, Inc. | | Oil & Gas Operator | Sep 1991 |
| 22360 | Pentarch Petroleum | | Oil Operator | Mar 2025 |
| 22361 | Pentergy Operating, LLC | New Braunfels, TX 78132 | Oil & Gas Operator | May 2025 |
| 22362 | Pentex Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2003 |
| 22363 | Pentex Operating Company | Oklahoma City, OK 73132 | Oil & Gas Operator | Oct 1994 |
| 22364 | Penton And Penton | | Oil & Gas Operator | Jan 1983 |
| 22365 | Pentress Gas LLC | Pentress, WV 26544 | Gas Operator | Dec 2021 |
| 22366 | Penwell Energy, Inc. | Houston, TX 77057 | Oil & Gas Operator | May 2025 |
| 22367 | Penwell South Operating LLC | Houston, TX 77269 | Oil Operator | May 2025 |
| 22368 | Peoco LLC | | Gas Operator | Feb 2025 |
| 22369 | Peoples Bank & Trust Company | McPherson, KS 67460 | Oil Operator | Jan 2013 |
| 22370 | Peoples Energy Prod.-TX, L.P. | Houston, TX 77002 | Oil & Gas Operator | Sep 2007 |
| 22371 | Peoples Energy Production-Texas, L.P. | Houston, TX 77010 | Oil & Gas Operator | Oct 2007 |
| 22372 | Peoples Gas Co LLC | Butler, PA 16001-4904 | Oil & Gas Operator | Dec 2005 |
| 22373 | Peoples Natural Gas Co LLC | Pittsburgh, PA 15212 | Gas Operator | Dec 2016 |
| 22374 | Peoples Oil, LLC | Ottawa, KS 66067 | Oil Operator | Jan 2025 |
| 22375 | Pep Drilling LLC | MT Vernon, IL 62864 | Oil & Gas Operator | Dec 2022 |
| 22376 | Pepin Oil Co | Stillwater, OK 74076 | Oil & Gas Operator | Oct 2013 |
| 22377 | Pepin Operating Company Inc | Stillwater, OK 74075-9535 | Oil & Gas Operator | May 2009 |
| 22378 | Pepper Development, LLC | Clarksburg, WV 26302 | Oil & Gas Operator | Dec 2021 |
| 22379 | Pepper Oil Co | Newark, OH 43055 | Oil & Gas Operator | Dec 1992 |
| 22380 | Percussion Petroleum Oper II,LLC | Houston, TX 77042 | Oil & Gas Operator | Jul 2023 |
| 22381 | Percussion Petroleum Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2019 |
| 22382 | Perdido Energy Louisiana, LLC | | Oil & Gas Operator | Dec 2024 |
| 22383 | Perdido Energy, LLC | Houston, TX 77251 | Oil & Gas Operator | May 2025 |
| 22384 | Perdue-Davidson Oil Co | | Oil & Gas Operator | Dec 2021 |
| 22385 | Perdura Energy L.L.C. | | Oil & Gas Operator | Apr 2018 |
| 22386 | Perdure Petroleum LLC | Allen, TX 75013 | Oil & Gas Operator | Oct 2021 |
| 22387 | Peregrine Energy, Inc. | Spring, TX 77393 | Oil & Gas Operator | Jul 1999 |
| 22388 | Peregrine Petroleum Corp | Oklahoma City, OK 73116-7639 | Oil & Gas Operator | May 2020 |
| 22389 | Peregrine Petroleum Partners, LTD | | Oil & Gas Operator | Oct 2021 |
| 22390 | Peregrine Petroleum PRTNR, LTD. | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 22391 | Perenco LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2005 |
| 22392 | Perera Ray & Den | | Oil Operator | Sep 1994 |
| 22393 | Perez, H. F. | Alice, TX 78332 | Oil & Gas Operator | May 2023 |
| 22394 | Perfection Oil & Gas Co | | Gas Operator | Sep 1937 |
| 22395 | Performance Energy Partners LLC | Barnsdall, OK 74002-0628 | Oil & Gas Operator | Oct 2024 |
| 22396 | Performance Operating Company LLC | Barnsdall, OK 74002 | Oil & Gas Operator | Feb 2025 |
| 22397 | Performance Operating Partners, LLC | Shreveport, LA 71164 | Oil & Gas Operator | May 2025 |
| 22398 | Performance Petroleum Company LLC | Barnsdall, OK 74002 | Oil & Gas Operator | Feb 2025 |
| 22399 | Pergerson Energy, L.L.C. | Richmond, VA 23225 | Oil Operator | May 2025 |
| 22400 | Perimeter Resource Company | Midland, TX 79702 | Oil & Gas Operator | May 2025 |