| 22501 | Petro-Mac Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2025 |
| 22502 | Petro-Management Assoc., Inc. | Edmond, OK 73083-2346 | Oil & Gas Operator | Jun 2007 |
| 22503 | Petro-Management Inc | | Oil Operator | Dec 1998 |
| 22504 | Petro-Mark, Inc. | St Petersburg, FL 33701 | Oil & Gas Operator | Dec 2021 |
| 22505 | Petro-Met Energy LLC | Edmond, OK 73034-1237 | Oil Operator | Mar 2025 |
| 22506 | Petro-Raider LLC | Midland, TX 79702 | Oil & Gas Operator | Jun 2025 |
| 22507 | Petro-Smith Operating LLC | Houston, TX 77010 | Oil & Gas Operator | Jun 2025 |
| 22508 | Petro-Technology | | Oil & Gas Operator | Aug 1991 |
| 22509 | Petro-Technology, Inc. | Topeka, KS 66604 | Gas Operator | Dec 1997 |
| 22510 | Petro-Tex Energy & Expl.Co.,Inc. | Llano, TX 78643 | Oil & Gas Operator | Jun 2025 |
| 22511 | Petro-Ventures, Inc. - Miss. | | Oil & Gas Operator | Apr 2009 |
| 22512 | Petro-West Corporation | Lubbock, TX 79404 | Oil & Gas Operator | Oct 2001 |
| 22513 | Petro-X Corporation | Houston, TX 77092 | Oil & Gas Operator | Jul 2002 |
| 22514 | Petrobal Omega 1, LLC | Little Elm, TX 75068 | Oil & Gas Operator | Jun 2025 |
| 22515 | Petrobank Opr Co | Denver, CO 80202-4675 | Gas Operator | Dec 1992 |
| 22516 | Petrocan, Inc. | | Oil & Gas Operator | Apr 1998 |
| 22517 | Petrocana,Inc. | | Oil & Gas Operator | Aug 1993 |
| 22518 | Petrocarbon Energy Corporation | | Oil Operator | Sep 1996 |
| 22519 | Petrocarbon Energy Trust | | Oil Operator | Sep 1996 |
| 22520 | Petrocat Innovations, LLC | Forney, TX 75126 | Oil Operator | Jun 2025 |
| 22521 | Petrocoastal, Inc. | Frisco, TX 75036 | Oil & Gas Operator | Jun 2025 |
| 22522 | Petrocon Inc | Delaware, OH 43015-7147-7147 | Oil & Gas Operator | Dec 2010 |
| 22523 | Petrocorp | | Oil & Gas Operator | Nov 1992 |
| 22524 | Petrocorp Acquisition Company | Tulsa, OK 74121 | Oil & Gas Operator | Dec 2002 |
| 22525 | Petrocorp Incorporated | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2021 |
| 22526 | Petrocorp Incorporated,A TX.Corp | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2005 |
| 22527 | Petroda Oil & Gas LLC | Edmond, OK 73054 | Oil & Gas Operator | Feb 2023 |
| 22528 | Petrodata Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 2025 |
| 22529 | Petrodome Operating, LLC | Houston, TX 77265 | Oil & Gas Operator | Feb 2025 |
| 22530 | Petrodril Inc | Farmington, NM 87401 | Oil & Gas Operator | Jan 1987 |
| 22531 | Petrodudes | Crescent, OK 73028 | Oil & Gas Operator | Mar 2025 |
| 22532 | Petroel | Marietta, OH 45750 | Oil & Gas Operator | Dec 2000 |
| 22533 | Petroflow Energy Corporation | Tulsa, OK 74119-5405 | Oil & Gas Operator | Oct 2016 |
| 22534 | Petrofunds, Inc & Sunny South | | Oil & Gas Operator | Feb 1984 |
| 22535 | Petrofunds, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 1996 |
| 22536 | Petrofunds, Inc. & Herd | | Oil & Gas Operator | Mar 1984 |
| 22537 | Petrogas Energy Services, LLC | Dallas, TX 75214 | Oil Operator | Jun 2025 |
| 22538 | Petrogas Exploration Inc | | Oil Operator | Feb 2025 |
| 22539 | Petrogas Operating Corporation | Garland, TX 75043 | Oil Operator | Feb 2010 |
| 22540 | Petrogen, Incorporated | Katy, TX 77450 | Oil & Gas Operator | Jan 2012 |
| 22541 | Petroglen Company, Inc. | | Oil & Gas Operator | Jul 1990 |
| 22542 | Petroglyph Operating Co | Boise, ID 83709 | Oil & Gas Operator | Jul 2017 |
| 22543 | Petrogulf Corporation | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 22544 | Petrohawk Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2005 |
| 22545 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 22546 | Petrojen Production Company Inc | Bakersfield, CA 93311 | Oil Operator | Apr 2025 |
| 22547 | Petrol Industries, Inc. | Shreveport, LA 71137 | Oil & Gas Operator | Jun 2012 |
| 22548 | Petrol Oil & Gas, Inc. | Overland Park, KS 66210 | Oil & Gas Operator | Dec 2008 |
| 22549 | Petrolanic Inc | Tulsa, OK 74105 | Oil Operator | Oct 1991 |
| 22550 | Petrolegacy Energy II, LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2023 |
| 22551 | Petrolero Corp. | San Antonio, TX 78205 | Oil & Gas Operator | Feb 1998 |
| 22552 | Petrolero, LLC | Plano, TX 75026 | Oil & Gas Operator | Jun 2025 |
| 22553 | Petroleum Advisors Int'L., Inc. | Houston, TX 77224 | Gas Operator | Jun 2005 |
| 22554 | Petroleum Capital, L.C. | Dallas, TX 75367 | Oil & Gas Operator | Jun 2025 |
| 22555 | Petroleum Corp Of Delaware The | | Oil & Gas Operator | May 1991 |
| 22556 | Petroleum Corpor | | Oil Operator | Jan 1983 |
| 22557 | Petroleum Corporation Of Texas | Breckenridge, TX 76024 | Oil & Gas Operator | May 2002 |
| 22558 | Petroleum Develo | | Oil Operator | Sep 1986 |
| 22559 | Petroleum Development Company | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2025 |
| 22560 | Petroleum Development Cor | Bridgeport, WV 26330 | Oil & Gas Operator | Dec 2004 |
| 22561 | Petroleum Development Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2017 |
| 22562 | Petroleum Development LLC | | Oil Operator | Jul 2018 |
| 22563 | Petroleum Energy | | Oil & Gas Operator | Mar 1991 |
| 22564 | Petroleum Energy Corp | | Oil & Gas Operator | Aug 2012 |
| 22565 | Petroleum Energy, Inc. | Wichita, KS 67202 | Oil Operator | May 1999 |
| 22566 | Petroleum Engineering & Management Corp. | Casper, WY 82609 | Oil & Gas Operator | Jul 2018 |
| 22567 | Petroleum Engineers, Inc. | | Oil & Gas Operator | Jun 1983 |
| 22568 | Petroleum Enterp | | Oil & Gas Operator | Sep 1995 |
| 22569 | Petroleum Enterprises, Inc. | Hutchinson, KS 67504 | Oil & Gas Operator | May 2001 |
| 22570 | Petroleum Exchange | | Oil & Gas Operator | Oct 1997 |
| 22571 | Petroleum Explo Prod Inc | Oilton, OK 74052 | Oil & Gas Operator | Jan 2017 |
| 22572 | Petroleum Explor | | Oil Operator | Aug 1983 |
| 22573 | Petroleum Exploration Company LTD Dba Petex | | Oil Operator | Apr 2025 |
| 22574 | Petroleum Exploration Company LTD LP | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 22575 | Petroleum Exploration Company LTD., Limited P | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 22576 | Petroleum Futures-Chapman Oil | | Oil & Gas Operator | Jul 1981 |
| 22577 | Petroleum Inc | Wichita, KS 67202 | Oil & Gas Operator | Oct 2021 |
| 22578 | Petroleum Incorp | | Oil & Gas Operator | Apr 1993 |
| 22579 | Petroleum International, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2000 |
| 22580 | Petroleum Investment Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Nov 1998 |
| 22581 | Petroleum Investments, Inc | Shreveport, LA 71101 | Oil & Gas Operator | Dec 1977 |
| 22582 | Petroleum Land Company | Abilene, TX 79606 | Oil & Gas Operator | May 2000 |
| 22583 | Petroleum Manage | | Oil & Gas Operator | Oct 1994 |
| 22584 | Petroleum Management Int'L, Inc. | Sugar Land, TX 77487 | Oil & Gas Operator | Oct 1993 |
| 22585 | Petroleum Management LLC | Platteville, CO 80651 | Oil & Gas Operator | May 2011 |
| 22586 | Petroleum Management Prof Inc | Oklahoma City, OK 73120-1848 | Oil & Gas Operator | Apr 2009 |
| 22587 | Petroleum Management, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jun 2025 |
| 22588 | Petroleum Prod. MGMT | | Oil Operator | Nov 1995 |
| 22589 | Petroleum Produc | | Oil & Gas Operator | Dec 1996 |
| 22590 | Petroleum Production Corporation | Rantoul, KS 66079 | Oil Operator | Feb 2024 |
| 22591 | Petroleum Production Engineering | Fulton, TX 78358 | Oil Operator | Feb 2019 |
| 22592 | Petroleum Production Management, Inc. | Shawnee Mission, KS 66202 | Oil & Gas Operator | Nov 2021 |
| 22593 | Petroleum Production MGMT., Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Jun 2025 |
| 22594 | Petroleum Products Inc | | Oil Operator | Jun 1996 |
| 22595 | Petroleum Proper | | Oil & Gas Operator | Nov 1995 |
| 22596 | Petroleum Properties Co Inc | Tulsa, OK 74132-4010 | Oil & Gas Operator | Sep 2012 |
| 22597 | Petroleum Properties MGMT Co LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2005 |
| 22598 | Petroleum Properties MGMT Corp | | Oil & Gas Operator | Aug 1990 |
| 22599 | Petroleum Properties MGMT. Co. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2014 |
| 22600 | Petroleum Property MGMT, Inc (A) | Fort Worth, TX 76101 | Oil & Gas Operator | May 1994 |