| 21901 | Person Oil Co. | Bowie, TX 76230 | Oil & Gas Operator | Sep 2002 |
| 21902 | Person, Claude | Bowie, TX 76230 | Oil & Gas Operator | Apr 2007 |
| 21903 | Person, J.S., Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2026 |
| 21904 | Pesco | | Oil & Gas Operator | Oct 1984 |
| 21905 | Pet Processors L.L.C | Painesville, OH 44077 | Oil & Gas Operator | Dec 2025 |
| 21906 | Pet-Ex Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 21907 | Petco Energy Corporation | Hinsdale, IL 60521 | Oil & Gas Operator | Apr 2026 |
| 21908 | Petco Energy Ser | | Oil Operator | Apr 1986 |
| 21909 | Petco Petroleum Corp | Hinsdale, IL 60521 | Oil & Gas Operator | Jan 2026 |
| 21910 | Petcon Associates LTD | Denver, CO 80202 | Oil & Gas Operator | Sep 2018 |
| 21911 | Pete Caldwell Drilling Co.,Inc | | Oil & Gas Operator | Aug 1991 |
| 21912 | Pete Mills | Midland, TX 79707 | Oil & Gas Operator | Oct 2012 |
| 21913 | Pete'S Pumping & Well Services, LLC | Butler, AL 36904 | Oil & Gas Operator | Jan 2026 |
| 21914 | Petech Enterprises, Inc. | Houston, TX 77066 | Oil & Gas Operator | Jan 2004 |
| 21915 | Peterland Oil Co | | Oil Operator | Sep 1990 |
| 21916 | Peterman-Sturlese Et Al | | Oil & Gas Operator | Sep 1987 |
| 21917 | Peters Petroleum Corporation | Dallas, TX 75243 | Oil & Gas Operator | Jan 2014 |
| 21918 | Peters Walter J | | Oil & Gas Operator | Jul 1991 |
| 21919 | Petersen Production Company LLC | | Oil & Gas Operator | Dec 2019 |
| 21920 | Peterson & Roberts | Loving, TX 76460 | Oil & Gas Operator | Mar 1998 |
| 21921 | Peterson Energy Management Inc | | Oil Operator | Aug 2010 |
| 21922 | Peterson Energy Operating Inc | Loveland, CO 80537 | Oil & Gas Operator | Feb 2026 |
| 21923 | Peterson Oil And Gas LLC | Wichita Falls, TX 76310 | Oil & Gas Operator | Apr 2026 |
| 21924 | Peterson Oil Co LLC | Centerville, KS 66014 | Oil Operator | Dec 2025 |
| 21925 | Peterson, Don Company | Loving, TX 76460 | Oil & Gas Operator | Jul 2017 |
| 21926 | Peterson, Thomas M. | Jamestown, NY 14701 | Oil & Gas Operator | Dec 2024 |
| 21927 | Petex | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2026 |
| 21928 | Petex Incorporat | | Oil Operator | Sep 1991 |
| 21929 | Petr Corporation | | Oil Operator | Apr 1988 |
| 21930 | Petr Exploration | | Oil Operator | Apr 1995 |
| 21931 | Petra Oleum Corp. | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 21932 | Petra Petroleum Inc | Littleton, CO 80160-0319 | Oil & Gas Operator | Jun 2005 |
| 21933 | Petra Petroleum Management LLC | Hotchkiss, CO 81419-0369 | Gas Operator | Sep 2014 |
| 21934 | Petra, Inc. | | Oil & Gas Operator | Apr 1987 |
| 21935 | Petral Exploration Inc LLC | Denver, CO 80217 | Oil & Gas Operator | May 2007 |
| 21936 | Petral Exploration LLC | Denver, CO 80217-5083 | Oil & Gas Operator | Dec 2001 |
| 21937 | Petralis Energy Resources, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 21938 | Petram Oil And Gas, LLC | Richmond, TX 77407 | Oil Operator | Apr 2026 |
| 21939 | Petrie Enterpris | | Oil & Gas Operator | Sep 1986 |
| 21940 | Petrie, Stanley D. | Pratt, KS 67124 | Gas Operator | Aug 1995 |
| 21941 | Petrik Oil | Bartlesville, OK 74006 | Oil Operator | Nov 1996 |
| 21942 | Petrik Oil - Jim | | Oil Operator | Apr 1995 |
| 21943 | Petro "E", LLC | | Oil & Gas Operator | Feb 2010 |
| 21944 | Petro 2000 Exploration Co. | Katy, TX 77450 | Oil & Gas Operator | Nov 2011 |
| 21945 | Petro 85 Incorpo | | Oil Operator | Mar 1993 |
| 21946 | Petro Capital Resources LLC | | Oil & Gas Operator | Dec 2025 |
| 21947 | Petro Davis Inc | Oklahoma City, OK 73142-1807 | Oil & Gas Operator | Jan 2013 |
| 21948 | Petro Delta | Rockdale, TX 76567 | Oil Operator | Apr 2026 |
| 21949 | Petro Dev Corp | Bridgeport, WV 26330-0026 | Oil & Gas Operator | Dec 2013 |
| 21950 | Petro Drilling & Producing Co. | Archer City, TX 76351 | Oil & Gas Operator | Apr 1997 |
| 21951 | Petro Drilling Corp | Columbus, OH 43229 | Oil & Gas Operator | Dec 1993 |
| 21952 | Petro Dynamics C | | Oil & Gas Operator | Sep 1988 |
| 21953 | Petro Energies I | | Oil & Gas Operator | Apr 1991 |
| 21954 | Petro Energy Inc | Farmington, NM 87499 | Oil & Gas Operator | Sep 2025 |
| 21955 | Petro Evaluation Services Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2023 |
| 21956 | Petro Evaluation SVC Inc | Wooster, OH 44691-1223 | Oil & Gas Operator | Dec 2008 |
| 21957 | Petro Harvester Operating Company, LLC | | Oil & Gas Operator | Nov 2022 |
| 21958 | Petro Hi-Tech, Inc. | Pasadena, TX 77505 | Oil & Gas Operator | Feb 2008 |
| 21959 | Petro Holdings, Inc. | Spencer, WV 25276-0000 | Oil & Gas Operator | Dec 2021 |
| 21960 | Petro Hunt Inc Of Kentucky | | Oil & Gas Operator | Dec 2006 |
| 21961 | Petro Lions, LLC | Somerset, TX 78069 | Oil Operator | Apr 2026 |
| 21962 | Petro Locators I | | Oil & Gas Operator | Dec 1995 |
| 21963 | Petro Locators, Inc. | Pratt, KS 67124 | Oil & Gas Operator | Dec 2025 |
| 21964 | Petro Mex Resources | | Oil & Gas Operator | Jan 2026 |
| 21965 | Petro Mex, LLC | Farmington, NM 87499 | Oil & Gas Operator | Feb 2026 |
| 21966 | Petro North LTD | Smethport, PA 16749-0742 | Oil & Gas Operator | Dec 2025 |
| 21967 | Petro Nova | | Oil Operator | Dec 2000 |
| 21968 | Petro Oil Produc | | Oil Operator | Aug 1989 |
| 21969 | Petro Oilfield Equipment Inc | Drumright, OK 74030-1233 | Oil & Gas Operator | Dec 2010 |
| 21970 | Petro Operating Company | | Oil & Gas Operator | Dec 2024 |
| 21971 | Petro Operating Company LLC | | Oil & Gas Operator | Jan 2026 |
| 21972 | Petro Pak Corpor | | Oil Operator | Aug 1988 |
| 21973 | Petro Plex Oil Co Inc. | Homosassa, FL 34448 | Oil & Gas Operator | Jul 2020 |
| 21974 | Petro Producers Corporation | | Oil & Gas Operator | Mar 1993 |
| 21975 | Petro Productions,Petrotec Production,Inc Dba | Wichita, KS 67202 | Oil Operator | Aug 1993 |
| 21976 | Petro Quest Inc | Guysville, OH 45735 | Oil & Gas Operator | Dec 2024 |
| 21977 | Petro Resources, Inc. | Fulton, TX 78358 | Oil & Gas Operator | Apr 2026 |
| 21978 | Petro River Operating, LLC | New York City, NY 10017 | Oil & Gas Operator | Jul 2011 |
| 21979 | Petro Search Exploration Corp | | Oil & Gas Operator | May 1993 |
| 21980 | Petro Speed Inc | Norman, OK 73069-8116 | Oil & Gas Operator | Mar 2015 |
| 21981 | Petro SVC Partners Inc | Indiana, PA 15701-8556 | Oil & Gas Operator | Dec 2025 |
| 21982 | Petro Valley Ser | | Gas Operator | Dec 1986 |
| 21983 | Petro Ventures Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2019 |
| 21984 | Petro Vest Operating LLC | | Oil Operator | Aug 2013 |
| 21985 | Petro Vest, Inc. | Houston, TX 77046 | Oil & Gas Operator | Sep 2014 |
| 21986 | Petro Warrior LLC | Wichita, KS 67206 | Oil & Gas Operator | Jan 2026 |
| 21987 | Petro-Assets Corporation | | Oil & Gas Operator | Feb 2000 |
| 21988 | Petro-Beth Oil & Gas, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2006 |
| 21989 | Petro-Can, Inc. | | Oil & Gas Operator | Apr 1998 |
| 21990 | Petro-Canada Resources (USA) | | Oil & Gas Operator | Dec 2009 |
| 21991 | Petro-Canada Resources (USA) Inc | Denver, CO 80202-472 | Oil & Gas Operator | Feb 2010 |
| 21992 | Petro-Chem Operating Company, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2026 |
| 21993 | Petro-Flow, Inc | | Gas Operator | Dec 2023 |
| 21994 | Petro-Go, Inc. | | Oil & Gas Operator | Mar 1996 |
| 21995 | Petro-Guard Company, Inc. | Houston, TX 77057 | Oil & Gas Operator | Nov 2014 |
| 21996 | Petro-Guard Production,L.L.C. | Houston, TX 77063 | Oil & Gas Operator | Dec 2024 |
| 21997 | Petro-Haley | Borger, TX 79008 | Oil & Gas Operator | Apr 2026 |
| 21998 | Petro-Hunt Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 2003 |
| 21999 | Petro-Hunt Dakota, LLC | | Oil & Gas Operator | Feb 2026 |
| 22000 | Petro-Hunt Permian, LLC | Dallas, TX 75201 | Oil & Gas Operator | Apr 2026 |