| 22401 | Petro-Ventures, Inc. - Miss. | | Oil & Gas Operator | Apr 2009 |
| 22402 | Petro-West Corporation | Lubbock, TX 79404 | Oil & Gas Operator | Oct 2001 |
| 22403 | Petro-X Corporation | Houston, TX 77092 | Oil & Gas Operator | Jul 2002 |
| 22404 | Petrobal Omega 1, LLC | Little Elm, TX 75068 | Oil & Gas Operator | Jul 2025 |
| 22405 | Petrobank Opr Co | Denver, CO 80202-4675 | Gas Operator | Dec 1992 |
| 22406 | Petrocan, Inc. | | Oil & Gas Operator | Apr 1998 |
| 22407 | Petrocana,Inc. | | Oil & Gas Operator | Aug 1993 |
| 22408 | Petrocarbon Energy Corporation | | Oil Operator | Sep 1996 |
| 22409 | Petrocarbon Energy Trust | | Oil Operator | Sep 1996 |
| 22410 | Petrocat Innovations, LLC | Forney, TX 75126 | Oil Operator | Jul 2025 |
| 22411 | Petrocoastal, Inc. | Frisco, TX 75036 | Oil & Gas Operator | Jul 2025 |
| 22412 | Petrocon Inc | Delaware, OH 43015-7147 | Oil & Gas Operator | Dec 2010 |
| 22413 | Petrocorp | | Oil & Gas Operator | Nov 1992 |
| 22414 | Petrocorp Acquisition Company | Tulsa, OK 74121 | Oil & Gas Operator | Dec 2002 |
| 22415 | Petrocorp Incorporated | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2021 |
| 22416 | Petrocorp Incorporated,A TX.Corp | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2005 |
| 22417 | Petroda Oil & Gas LLC | Edmond, OK 73054 | Oil & Gas Operator | Feb 2023 |
| 22418 | Petrodata Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 22419 | Petrodome Operating, LLC | Houston, TX 77265 | Oil & Gas Operator | Mar 2025 |
| 22420 | Petrodril Inc | Farmington, NM 87401 | Oil & Gas Operator | Jan 1987 |
| 22421 | Petroel | Marietta, OH 45750 | Oil & Gas Operator | Dec 2000 |
| 22422 | Petroflow Energy Corporation | Tulsa, OK 74119-5405 | Oil & Gas Operator | Oct 2016 |
| 22423 | Petrofunds, Inc & Sunny South | | Oil & Gas Operator | Feb 1984 |
| 22424 | Petrofunds, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 1996 |
| 22425 | Petrofunds, Inc. & Herd | | Oil & Gas Operator | Mar 1984 |
| 22426 | Petrogas Energy Services, LLC | Dallas, TX 75214 | Oil Operator | Jul 2025 |
| 22427 | Petrogas Exploration Inc | | Oil Operator | Feb 2025 |
| 22428 | Petrogas Operating Corporation | Garland, TX 75043 | Oil Operator | Feb 2010 |
| 22429 | Petrogen, Incorporated | Katy, TX 77450 | Oil & Gas Operator | Jan 2012 |
| 22430 | Petroglen Company, Inc. | | Oil & Gas Operator | Jul 1990 |
| 22431 | Petroglyph Operating Co | Boise, ID 83709 | Oil & Gas Operator | Jul 2017 |
| 22432 | Petrogulf Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 2025 |
| 22433 | Petrohawk Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2005 |
| 22434 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 22435 | Petrojen Production Company Inc | Bakersfield, CA 93311 | Oil Operator | Apr 2025 |
| 22436 | Petrol Industries, Inc. | Shreveport, LA 71137 | Oil & Gas Operator | Jun 2012 |
| 22437 | Petrol Oil & Gas, Inc. | Overland Park, KS 66210 | Oil & Gas Operator | Dec 2008 |
| 22438 | Petrolanic Inc | Tulsa, OK 74105 | Oil Operator | Oct 1991 |
| 22439 | Petrolegacy Energy II, LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2023 |
| 22440 | Petrolero Corp. | San Antonio, TX 78205 | Oil & Gas Operator | Feb 1998 |
| 22441 | Petrolero, LLC | Plano, TX 75026 | Oil & Gas Operator | Jul 2025 |
| 22442 | Petroleum Advisors Int'L., Inc. | Houston, TX 77224 | Gas Operator | Jun 2005 |
| 22443 | Petroleum Capital, L.C. | Dallas, TX 75367 | Oil & Gas Operator | Jul 2025 |
| 22444 | Petroleum Corp Of Delaware The | | Oil & Gas Operator | May 1991 |
| 22445 | Petroleum Corpor | | Oil Operator | Jan 1983 |
| 22446 | Petroleum Corporation Of Texas | Breckenridge, TX 76024 | Oil & Gas Operator | May 2002 |
| 22447 | Petroleum Develo | | Oil Operator | Sep 1986 |
| 22448 | Petroleum Development Company | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2025 |
| 22449 | Petroleum Development Cor | Bridgeport, WV 26330 | Oil & Gas Operator | Dec 2004 |
| 22450 | Petroleum Development Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2017 |
| 22451 | Petroleum Development LLC | | Oil Operator | Jul 2018 |
| 22452 | Petroleum Energy | | Oil & Gas Operator | Mar 1991 |
| 22453 | Petroleum Energy Corp | | Oil & Gas Operator | Aug 2012 |
| 22454 | Petroleum Energy, Inc. | Wichita, KS 67202 | Oil Operator | May 1999 |
| 22455 | Petroleum Engineering & Management Corp. | Casper, WY 82609 | Oil & Gas Operator | Jul 2018 |
| 22456 | Petroleum Engineers, Inc. | | Oil & Gas Operator | Jun 1983 |
| 22457 | Petroleum Enterp | | Oil & Gas Operator | Sep 1995 |
| 22458 | Petroleum Enterprises, Inc. | Hutchinson, KS 67504 | Oil & Gas Operator | May 2001 |
| 22459 | Petroleum Exchange | | Oil & Gas Operator | Oct 1997 |
| 22460 | Petroleum Explo Prod Inc | Oilton, OK 74052 | Oil & Gas Operator | Jan 2017 |
| 22461 | Petroleum Explor | | Oil Operator | Aug 1983 |
| 22462 | Petroleum Exploration Company LTD Dba Petex | | Oil Operator | May 2025 |
| 22463 | Petroleum Exploration Company LTD LP | Breckenridge, TX 76424 | Oil & Gas Operator | May 2025 |
| 22464 | Petroleum Exploration Company LTD., Limited P | Breckenridge, TX 76424 | Oil & Gas Operator | May 2025 |
| 22465 | Petroleum Futures-Chapman Oil | | Oil & Gas Operator | Jul 1981 |
| 22466 | Petroleum Inc | Wichita, KS 67202 | Oil & Gas Operator | Oct 2021 |
| 22467 | Petroleum Incorp | | Oil & Gas Operator | Apr 1993 |
| 22468 | Petroleum International, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2000 |
| 22469 | Petroleum Investment Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Nov 1998 |
| 22470 | Petroleum Investments, Inc | Shreveport, LA 71101 | Oil & Gas Operator | Dec 1977 |
| 22471 | Petroleum Land Company | Abilene, TX 79606 | Oil & Gas Operator | May 2000 |
| 22472 | Petroleum Manage | | Oil & Gas Operator | Oct 1994 |
| 22473 | Petroleum Management Int'L, Inc. | Sugar Land, TX 77487 | Oil & Gas Operator | Oct 1993 |
| 22474 | Petroleum Management LLC | Platteville, CO 80651 | Oil & Gas Operator | May 2011 |
| 22475 | Petroleum Management Prof Inc | Oklahoma City, OK 73120-1848 | Oil & Gas Operator | Apr 2009 |
| 22476 | Petroleum Management, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jul 2025 |
| 22477 | Petroleum Prod. MGMT | | Oil Operator | Nov 1995 |
| 22478 | Petroleum Produc | | Oil & Gas Operator | Dec 1996 |
| 22479 | Petroleum Production Corporation | Rantoul, KS 66079 | Oil Operator | Feb 2024 |
| 22480 | Petroleum Production Engineering | Fulton, TX 78358 | Oil Operator | Feb 2019 |
| 22481 | Petroleum Production Management, Inc. | Shawnee Mission, KS 66202 | Oil & Gas Operator | Nov 2021 |
| 22482 | Petroleum Production MGMT., Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Jul 2025 |
| 22483 | Petroleum Products Inc | | Oil Operator | Jun 1996 |
| 22484 | Petroleum Proper | | Oil & Gas Operator | Nov 1995 |
| 22485 | Petroleum Properties Co Inc | Tulsa, OK 74132-4010 | Oil & Gas Operator | Sep 2012 |
| 22486 | Petroleum Properties MGMT Co LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2005 |
| 22487 | Petroleum Properties MGMT Corp | | Oil & Gas Operator | Aug 1990 |
| 22488 | Petroleum Properties MGMT. Co. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2014 |
| 22489 | Petroleum Property MGMT, Inc (A) | Fort Worth, TX 76101 | Oil & Gas Operator | May 1994 |
| 22490 | Petroleum Property Services, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Mar 2025 |
| 22491 | Petroleum Recovery & Expl Inc. | | Oil Operator | Oct 1984 |
| 22492 | Petroleum Recovery Systems, L.C. | Houston, TX 77024 | Oil Operator | Jul 2025 |
| 22493 | Petroleum Reserve Corporation | Plymouth MTNG, PA 19462 | Oil & Gas Operator | May 2008 |
| 22494 | Petroleum Resource Management Co | Fort Worth, TX 76107 | Oil & Gas Operator | Jan 2024 |
| 22495 | Petroleum Resource Management Corp | Denver, CO 80203 | Oil & Gas Operator | Jun 2025 |
| 22496 | Petroleum Resource MGMT Co TX | | Oil & Gas Operator | Sep 2020 |
| 22497 | Petroleum Resources Co | Wichita, KS 67206 | Oil & Gas Operator | May 2000 |
| 22498 | Petroleum Resources MGMT Corp. | | Oil & Gas Operator | Mar 2002 |
| 22499 | Petroleum Resources, LLC | | Oil & Gas Operator | Dec 2021 |
| 22500 | Petroleum Service Partners, Inc. | Indiana, PA 15701-0000 | Oil & Gas Operator | Dec 2021 |