| 22001 | Petroleum Energy | | Oil & Gas Operator | Mar 1991 |
| 22002 | Petroleum Energy Corp | | Oil & Gas Operator | Jul 2012 |
| 22003 | Petroleum Energy, Inc. | Wichita, KS 67202 | Oil Operator | May 1999 |
| 22004 | Petroleum Engineering & Management Corp. | Casper, WY 82609 | Oil & Gas Operator | Jul 2018 |
| 22005 | Petroleum Engineers, Inc. | | Oil & Gas Operator | Jun 1983 |
| 22006 | Petroleum Enterp | | Oil & Gas Operator | Sep 1995 |
| 22007 | Petroleum Enterprises, Inc. | Hutchinson, KS 67504 | Oil & Gas Operator | May 2001 |
| 22008 | Petroleum Exchange | | Oil & Gas Operator | Oct 1997 |
| 22009 | Petroleum Explo Prod Inc | Oilton, OK 74052 | Oil & Gas Operator | Jan 2017 |
| 22010 | Petroleum Explor | | Oil Operator | Aug 1983 |
| 22011 | Petroleum Exploration Co | | Oil Operator | Dec 2024 |
| 22012 | Petroleum Exploration Company LTD Dba Petex | | Oil & Gas Operator | Jan 2026 |
| 22013 | Petroleum Exploration Company LTD LP | Breckenridge, TX 76424 | Oil & Gas Operator | Mar 2026 |
| 22014 | Petroleum Exploration Company LTD., Limited | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2026 |
| 22015 | Petroleum Futures-Chapman Oil | | Oil & Gas Operator | Jul 1981 |
| 22016 | Petroleum Inc | Wichita, KS 67202 | Oil & Gas Operator | Oct 2021 |
| 22017 | Petroleum Incorp | | Oil & Gas Operator | Apr 1993 |
| 22018 | Petroleum International, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2000 |
| 22019 | Petroleum Investment Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Nov 1998 |
| 22020 | Petroleum Investments, Inc | Shreveport, LA 71101 | Oil & Gas Operator | Dec 1977 |
| 22021 | Petroleum Land Company | Abilene, TX 79606 | Oil & Gas Operator | May 2000 |
| 22022 | Petroleum Manage | | Oil & Gas Operator | Oct 1994 |
| 22023 | Petroleum Management Int'L, Inc. | Sugar Land, TX 77487 | Oil & Gas Operator | Oct 1993 |
| 22024 | Petroleum Management LLC | Platteville, CO 80651 | Oil & Gas Operator | Mar 2011 |
| 22025 | Petroleum Management Prof Inc | Oklahoma City, OK 73120-1848 | Oil & Gas Operator | Apr 2009 |
| 22026 | Petroleum Management, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jun 2026 |
| 22027 | Petroleum Prod. MGMT | | Oil Operator | Nov 1995 |
| 22028 | Petroleum Produc | | Oil & Gas Operator | Dec 1996 |
| 22029 | Petroleum Production Corporation | Rantoul, KS 66079 | Oil Operator | Feb 2024 |
| 22030 | Petroleum Production Engineering | Fulton, TX 78358 | Oil Operator | Feb 2019 |
| 22031 | Petroleum Production Management Inc | Shawnee Mission, KS 66202 | Oil & Gas Operator | Nov 2021 |
| 22032 | Petroleum Production MGMT., Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Jun 2026 |
| 22033 | Petroleum Products Inc | | Oil Operator | Jun 1996 |
| 22034 | Petroleum Proper | | Oil & Gas Operator | Nov 1995 |
| 22035 | Petroleum Properties Co Inc | Tulsa, OK 74132-4010 | Oil & Gas Operator | Sep 2012 |
| 22036 | Petroleum Properties MGMT Co LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2005 |
| 22037 | Petroleum Properties MGMT Corp | | Oil & Gas Operator | Aug 1990 |
| 22038 | Petroleum Properties MGMT. Co. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2014 |
| 22039 | Petroleum Property MGMT, Inc (A) | Fort Worth, TX 76101 | Oil & Gas Operator | May 1994 |
| 22040 | Petroleum Property Services, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Feb 2026 |
| 22041 | Petroleum Recovery & Expl Inc. | | Oil Operator | Oct 1984 |
| 22042 | Petroleum Recovery Systems, L.C. | Houston, TX 77024 | Oil Operator | Jun 2026 |
| 22043 | Petroleum Reserve Corporation | Plymouth MTNG, PA 19462 | Oil & Gas Operator | May 2008 |
| 22044 | Petroleum Resource Management Co | Fort Worth, TX 76107 | Oil & Gas Operator | Jan 2024 |
| 22045 | Petroleum Resource Management Corp | Denver, CO 80203 | Oil & Gas Operator | Mar 2026 |
| 22046 | Petroleum Resource MGMT Co TX | | Oil & Gas Operator | Sep 2020 |
| 22047 | Petroleum Resources Co | Wichita, KS 67206 | Oil & Gas Operator | May 2000 |
| 22048 | Petroleum Resources MGMT Corp. | | Oil & Gas Operator | Mar 2002 |
| 22049 | Petroleum Resources, LLC | | Oil & Gas Operator | Dec 2021 |
| 22050 | Petroleum Service Partners, Inc. | Indiana, PA 15701-0000 | Oil & Gas Operator | Dec 2021 |
| 22051 | Petroleum Technical Services Co. | Midland, TX 79707 | Oil & Gas Operator | Dec 2004 |
| 22052 | Petroleum Techno | | Oil & Gas Operator | Dec 1996 |
| 22053 | Petroleum Technologies, Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Feb 2026 |
| 22054 | Petroleum Venture Capitol Corp | | Oil Operator | Jun 1980 |
| 22055 | Petroleum Well Service LLC | Silsbee, TX 77656 | Oil Operator | Jun 2026 |
| 22056 | Petrolia Energy Corporation | Pearland, TX 77581 | Oil Operator | Jan 2024 |
| 22057 | Petrolia Group, L.L.C. | Katy, TX 77449 | Oil & Gas Operator | Jun 2026 |
| 22058 | Petromac, Inc. | Onalaska, TX 77360 | Oil & Gas Operator | Jun 2026 |
| 22059 | Petromark Energy LLC | Oklahoma City, OK 73116-7634 | Oil & Gas Operator | Jun 2000 |
| 22060 | Petromark Resources Company | Tulsa, OK 74136 | Oil & Gas Operator | Sep 1993 |
| 22061 | Petromax Oil And Gas Inc | | Oil & Gas Operator | Dec 1988 |
| 22062 | Petromerica Operating LLC | Oklahoma City, OK 73102-4613 | Oil Operator | Mar 2026 |
| 22063 | Petrominerals Corp. | | Oil & Gas Operator | Dec 2003 |
| 22064 | Petromining, Inc. | Plano, TX 75026 | Oil & Gas Operator | Jun 2026 |
| 22065 | Petron Development Company | | Oil & Gas Operator | Sep 2020 |
| 22066 | Petron Energy Inc | Dallas, TX 75252 | Oil & Gas Operator | Jun 2026 |
| 22067 | Petron Oil Company | Missouri City, TX 77489 | Oil & Gas Operator | Jun 2026 |
| 22068 | Petronomics Petroleum, Inc. | Austin, TX 78734 | Oil & Gas Operator | Jan 1995 |
| 22069 | Petronomics, Inc. | Houston, TX 77074 | Oil & Gas Operator | Aug 2003 |
| 22070 | Petronova, LLC | | Gas Operator | Jul 2014 |
| 22071 | Petroplex Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 2026 |
| 22072 | Petroplex Equipment, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2019 |
| 22073 | Petropoint Energy Operating, LLC | Houston, TX 77098 | Oil & Gas Operator | Jun 2026 |
| 22074 | Petroprize | | Oil & Gas Operator | Mar 2026 |
| 22075 | Petropro Energy Partners, L.P. | Houston, TX 77024 | Oil & Gas Operator | Jan 2013 |
| 22076 | Petropro Petroleum LLC | | Oil Operator | Feb 2026 |
| 22077 | Petroquest Energy, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Feb 2001 |
| 22078 | Petroquest Energy, L.L.C. | Lafayette, LA 70505 | Oil & Gas Operator | Jun 2026 |
| 22079 | Petroquest Exploration, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Mar 2008 |
| 22080 | Petroquest Oil & Gas LLC | Wewoka, OK 74884 | Oil & Gas Operator | Mar 2026 |
| 22081 | Petroquest, LLC | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2025 |
| 22082 | Petroreal Inc. | Temple, TX 76503 | Oil & Gas Operator | Jun 2026 |
| 22083 | Petrorep Inc | | Oil Operator | Oct 1998 |
| 22084 | Petrosantander (USA) Inc. | Houston, TX 77057 | Oil & Gas Operator | Feb 2026 |
| 22085 | Petrosaurus, Inc. | Somerset, TX 78069 | Oil Operator | Jun 2026 |
| 22086 | Petrosearch Operating Co, LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2026 |
| 22087 | Petroshale (Us) Inc. | | Oil & Gas Operator | Apr 2026 |
| 22088 | Petroshare Corporation | | Oil & Gas Operator | Jan 2024 |
| 22089 | Petrosil Resources Inc. | | Oil & Gas Operator | Oct 1981 |
| 22090 | Petrosource Energy Corporation | Fort Worth, TX 76112 | Oil & Gas Operator | Jun 2026 |
| 22091 | Petrosource Production Co. L.P. | Midland, TX 79701 | Oil & Gas Operator | Nov 2007 |
| 22092 | Petrosource Production Co., LLC | Midland, TX 79705 | Oil & Gas Operator | Jun 2026 |
| 22093 | Petrotec LLC | The Woodlands, TX 77382 | Oil & Gas Operator | Feb 2017 |
| 22094 | Petrotech Resources Corp | Glasgow, KY 42141 | Oil & Gas Operator | Dec 2024 |
| 22095 | Petrotex Engineering Company | Cypress, TX 77429 | Oil & Gas Operator | Jun 2026 |
| 22096 | Petrotex Louisiana Company | | Oil & Gas Operator | Aug 1998 |
| 22097 | Petrotex, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Aug 2003 |
| 22098 | Petrotx Operating, LLC | Kingwood, TX 77339 | Oil & Gas Operator | Jun 2026 |
| 22099 | Petroventures In | | Oil Operator | Apr 1987 |
| 22100 | Petrovybe Opco LLC | Plano, TX 75093 | Oil & Gas Operator | Jun 2026 |