| 22001 | Petro Ventures Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2019 |
| 22002 | Petro Vest Operating LLC | | Oil Operator | Aug 2013 |
| 22003 | Petro Vest, Inc. | Houston, TX 77046 | Oil & Gas Operator | Sep 2014 |
| 22004 | Petro Warrior LLC | Wichita, KS 67206 | Oil & Gas Operator | Jun 2026 |
| 22005 | Petro-Assets Corporation | | Oil & Gas Operator | Feb 2000 |
| 22006 | Petro-Beth Oil & Gas, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2006 |
| 22007 | Petro-Can, Inc. | | Oil & Gas Operator | Apr 1998 |
| 22008 | Petro-Canada Resources (USA) | | Oil & Gas Operator | Dec 2009 |
| 22009 | Petro-Canada Resources (USA) Inc | Denver, CO 80202-472 | Oil & Gas Operator | Feb 2010 |
| 22010 | Petro-Chem Operating Company, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 2026 |
| 22011 | Petro-Flow, Inc | | Gas Operator | Dec 2023 |
| 22012 | Petro-Go, Inc. | | Oil & Gas Operator | Mar 1996 |
| 22013 | Petro-Guard Company, Inc. | Houston, TX 77057 | Oil & Gas Operator | Nov 2014 |
| 22014 | Petro-Guard Production,L.L.C. | Houston, TX 77063 | Oil & Gas Operator | Dec 2024 |
| 22015 | Petro-Haley | Borger, TX 79008 | Oil & Gas Operator | Sep 2026 |
| 22016 | Petro-Hunt Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 2003 |
| 22017 | Petro-Hunt Dakota, LLC | | Oil & Gas Operator | Jun 2026 |
| 22018 | Petro-Hunt Permian, LLC | Dallas, TX 75201 | Oil & Gas Operator | Sep 2026 |
| 22019 | Petro-Hunt, L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | Sep 2026 |
| 22020 | Petro-Lewis Corp. | | Oil & Gas Operator | Feb 1994 |
| 22021 | Petro-Lud Inc. | | Oil & Gas Operator | Jul 2026 |
| 22022 | Petro-Mac Corporation | Tulsa, OK 74103 | Oil & Gas Operator | May 2026 |
| 22023 | Petro-Management Assoc., Inc. | Edmond, OK 73083-2346 | Oil & Gas Operator | Jun 2007 |
| 22024 | Petro-Management Inc | | Oil Operator | Dec 1998 |
| 22025 | Petro-Mark, Inc. | St Petersburg, FL 33701 | Oil & Gas Operator | Dec 2021 |
| 22026 | Petro-Met Energy LLC | Edmond, OK 73034-1237 | Oil Operator | May 2026 |
| 22027 | Petro-Raider LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 22028 | Petro-Smith Operating LLC | Houston, TX 77010 | Oil & Gas Operator | Sep 2026 |
| 22029 | Petro-Technology | | Oil & Gas Operator | Aug 1991 |
| 22030 | Petro-Tex Energy & Expl.Co.,Inc. | Llano, TX 78643 | Oil & Gas Operator | Sep 2026 |
| 22031 | Petro-Ventures, Inc. - Miss. | | Oil & Gas Operator | Apr 2009 |
| 22032 | Petro-West Corporation | Lubbock, TX 79404 | Oil & Gas Operator | Oct 2001 |
| 22033 | Petro-X Corporation | Houston, TX 77092 | Oil & Gas Operator | Jul 2002 |
| 22034 | Petrobal Omega 1, LLC | Little Elm, TX 75068 | Oil & Gas Operator | Sep 2026 |
| 22035 | Petrobank Opr Co | Denver, CO 80202-4675 | Gas Operator | Dec 1992 |
| 22036 | Petroc Company | Rocky River, OH 44116 | Oil Operator | Dec 2008 |
| 22037 | Petrocana,Inc. | | Oil & Gas Operator | Aug 1993 |
| 22038 | Petrocarbon Energy Corporation | | Oil Operator | Sep 1996 |
| 22039 | Petrocarbon Energy Trust | | Oil Operator | Sep 1996 |
| 22040 | Petrocat Innovations, LLC | Forney, TX 75126 | Oil Operator | Sep 2026 |
| 22041 | Petrocoastal, Inc. | Frisco, TX 75036 | Oil & Gas Operator | Sep 2026 |
| 22042 | Petrocon Inc | Delaware, OH 43015-7147 | Oil & Gas Operator | Dec 2010 |
| 22043 | Petrocorp | | Oil & Gas Operator | Nov 1992 |
| 22044 | Petrocorp Acquisition Company | Tulsa, OK 74121 | Oil & Gas Operator | Dec 2002 |
| 22045 | Petrocorp Incorporated | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2021 |
| 22046 | Petrocorp Incorporated,A TX.Corp | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2005 |
| 22047 | Petroda Oil & Gas LLC | Edmond, OK 73054 | Oil & Gas Operator | Feb 2023 |
| 22048 | Petrodata Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 22049 | Petrodome Operating, LLC | Houston, TX 77265 | Oil & Gas Operator | Sep 2024 |
| 22050 | Petrodril Inc | Farmington, NM 87401 | Oil & Gas Operator | Jan 1987 |
| 22051 | Petroel | Marietta, OH 45750 | Oil & Gas Operator | Dec 2000 |
| 22052 | Petroflow Energy Corporation | Tulsa, OK 74119-5405 | Oil & Gas Operator | Oct 2016 |
| 22053 | Petrofunds, Inc & Sunny South | | Oil & Gas Operator | Feb 1984 |
| 22054 | Petrofunds, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 1996 |
| 22055 | Petrofunds, Inc. & Herd | | Oil & Gas Operator | Mar 1984 |
| 22056 | Petrogas Energy Services, LLC | Dallas, TX 75214 | Oil Operator | Sep 2026 |
| 22057 | Petrogas Exploration Inc | | Oil Operator | Apr 2026 |
| 22058 | Petrogas Operating Corporation | Garland, TX 75043 | Oil Operator | Feb 2010 |
| 22059 | Petroglen Company, Inc. | | Oil & Gas Operator | Jul 1990 |
| 22060 | Petroglyph Operating Co | Boise, ID 83709 | Oil & Gas Operator | Jul 2017 |
| 22061 | Petrogulf Corporation | Denver, CO 80202 | Oil & Gas Operator | Sep 2026 |
| 22062 | Petrohawk Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2005 |
| 22063 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 22064 | Petrohunter Operating Company | | Oil & Gas Operator | Dec 2013 |
| 22065 | Petrojen Production Company Inc | Bakersfield, CA 93311 | Oil Operator | Jul 2026 |
| 22066 | Petrol Industries, Inc. | Shreveport, LA 71137 | Oil & Gas Operator | Jun 2012 |
| 22067 | Petrol Oil & Gas, Inc. | Overland Park, KS 66210 | Oil & Gas Operator | Dec 2008 |
| 22068 | Petrolanic Inc | Tulsa, OK 74105 | Oil Operator | Oct 1991 |
| 22069 | Petrolegacy Energy II, LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2023 |
| 22070 | Petrolero Corp. | San Antonio, TX 78205 | Oil & Gas Operator | Feb 1998 |
| 22071 | Petrolero, LLC | Plano, TX 75026 | Oil & Gas Operator | Sep 2026 |
| 22072 | Petroleum Advisors Int'L., Inc. | Houston, TX 77224 | Gas Operator | Jun 2005 |
| 22073 | Petroleum Capital, L.C. | Dallas, TX 75367 | Oil & Gas Operator | Sep 2026 |
| 22074 | Petroleum Corp Of Delaware The | | Oil & Gas Operator | May 1991 |
| 22075 | Petroleum Corpor | | Oil Operator | Jan 1983 |
| 22076 | Petroleum Corporation Of Texas | Breckenridge, TX 76024 | Oil & Gas Operator | May 2002 |
| 22077 | Petroleum Develo | | Oil Operator | Sep 1986 |
| 22078 | Petroleum Development Company | Tulsa, OK 74103 | Oil & Gas Operator | May 2026 |
| 22079 | Petroleum Development Cor | Bridgeport, WV 26330 | Oil & Gas Operator | Dec 2004 |
| 22080 | Petroleum Development Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2017 |
| 22081 | Petroleum Development LLC | | Oil Operator | Jul 2018 |
| 22082 | Petroleum Energy | | Oil & Gas Operator | Mar 1991 |
| 22083 | Petroleum Energy Corp | | Oil & Gas Operator | Jul 2012 |
| 22084 | Petroleum Energy, Inc. | Wichita, KS 67202 | Oil Operator | May 1999 |
| 22085 | Petroleum Engineering & Management Corp. | Casper, WY 82609 | Oil & Gas Operator | Jul 2018 |
| 22086 | Petroleum Engineers, Inc. | | Oil & Gas Operator | Jun 1983 |
| 22087 | Petroleum Enterp | | Oil & Gas Operator | Sep 1995 |
| 22088 | Petroleum Enterprises, Inc. | Hutchinson, KS 67504 | Oil & Gas Operator | May 2001 |
| 22089 | Petroleum Exchange | | Oil & Gas Operator | Oct 1997 |
| 22090 | Petroleum Explo Prod Inc | Oilton, OK 74052 | Oil & Gas Operator | Jan 2017 |
| 22091 | Petroleum Explor | | Oil Operator | Aug 1983 |
| 22092 | Petroleum Exploration Co | | Oil Operator | Dec 2024 |
| 22093 | Petroleum Exploration Company LTD Dba Petex | | Oil & Gas Operator | May 2026 |
| 22094 | Petroleum Exploration Company LTD LP | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2026 |
| 22095 | Petroleum Exploration Company LTD., Limited | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2026 |
| 22096 | Petroleum Futures-Chapman Oil | | Oil & Gas Operator | Jul 1981 |
| 22097 | Petroleum Inc | Wichita, KS 67202 | Oil & Gas Operator | Oct 2021 |
| 22098 | Petroleum Incorp | | Oil & Gas Operator | Apr 1993 |
| 22099 | Petroleum International, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2000 |
| 22100 | Petroleum Investment Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Nov 1998 |