| 901 | Peterland Oil Co | | Oil Operator | Sep 1990 |
| 902 | Peterman-Sturlese Et Al | | Oil & Gas Operator | Sep 1987 |
| 903 | Peters Petroleum Corporation | Dallas, TX 75243 | Oil & Gas Operator | Jan 2014 |
| 904 | Peters Walter J | | Oil & Gas Operator | Jul 1991 |
| 905 | Petersen Production Company LLC | | Oil & Gas Operator | Dec 2019 |
| 906 | Peterson & Roberts | Loving, TX 76460 | Oil & Gas Operator | Mar 1998 |
| 907 | Peterson Energy Management Inc | | Oil Operator | Aug 2010 |
| 908 | Peterson Energy Operating Inc | Loveland, CO 80537 | Oil & Gas Operator | Dec 2025 |
| 909 | Peterson Oil And Gas LLC | Wichita Falls, TX 76310 | Oil & Gas Operator | Feb 2026 |
| 910 | Peterson Oil Co LLC | Centerville, KS 66014 | Oil Operator | Sep 2025 |
| 911 | Peterson, Don Company | Loving, TX 76460 | Oil & Gas Operator | Jul 2017 |
| 912 | Peterson, Thomas M. | Jamestown, NY 14701 | Oil & Gas Operator | Dec 2024 |
| 913 | Petex | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2026 |
| 914 | Petex Incorporat | | Oil Operator | Sep 1991 |
| 915 | Pethtel Oil & Gas | | Oil & Gas Operator | Dec 2005 |
| 916 | Petr Corporation | | Oil Operator | Apr 1988 |
| 917 | Petr Exploration | | Oil Operator | Apr 1995 |
| 918 | Petra Oleum Corp. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 919 | Petra Petroleum Inc | Littleton, CO 80160-0319 | Oil & Gas Operator | Jun 2005 |
| 920 | Petra Petroleum Management LLC | Hotchkiss, CO 81419-0369 | Gas Operator | Sep 2014 |
| 921 | Petra, Inc. | | Oil & Gas Operator | Apr 1987 |
| 922 | Petral Exploration Inc LLC | Denver, CO 80217 | Oil & Gas Operator | May 2007 |
| 923 | Petral Exploration LLC | Denver, CO 80217-5083 | Oil & Gas Operator | Dec 2001 |
| 924 | Petralis Energy Resources, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 925 | Petram Oil And Gas, LLC | Richmond, TX 77407 | Oil Operator | Feb 2026 |
| 926 | Petrie Enterpris | | Oil & Gas Operator | Sep 1986 |
| 927 | Petrie, Stanley D. | Pratt, KS 67124 | Gas Operator | Aug 1995 |
| 928 | Petrik Oil | Bartlesville, OK 74006 | Oil Operator | Nov 1996 |
| 929 | Petrik Oil - Jim | | Oil Operator | Apr 1995 |
| 930 | Petro "E", LLC | | Oil & Gas Operator | Feb 2010 |
| 931 | Petro 2000 Exploration Co. | Katy, TX 77450 | Oil & Gas Operator | Nov 2011 |
| 932 | Petro 85 Incorpo | | Oil Operator | Mar 1993 |
| 933 | Petro Capital Resources LLC | | Oil & Gas Operator | Nov 2025 |
| 934 | Petro Davis Inc | Oklahoma City, OK 73142-1807 | Oil & Gas Operator | Jan 2013 |
| 935 | Petro Delta | Rockdale, TX 76567 | Oil Operator | Feb 2026 |
| 936 | Petro Dev Corp | Bridgeport, WV 26330-0026 | Oil & Gas Operator | Dec 2013 |
| 937 | Petro Drilling & Producing Co. | Archer City, TX 76351 | Oil & Gas Operator | Apr 1997 |
| 938 | Petro Drilling Corp | Columbus, OH 43229 | Oil & Gas Operator | Dec 1993 |
| 939 | Petro Dynamics C | | Oil & Gas Operator | Sep 1988 |
| 940 | Petro Energies I | | Oil & Gas Operator | Apr 1991 |
| 941 | Petro Energies, Inc. | Burrton, KS 67020 | Gas Operator | Jun 2014 |
| 942 | Petro Energy Inc | Farmington, NM 87499 | Oil & Gas Operator | Sep 2025 |
| 943 | Petro Evaluation Services Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2023 |
| 944 | Petro Evaluation SVC Inc | Wooster, OH 44691-1223 | Oil & Gas Operator | Dec 2008 |
| 945 | Petro General Corporation | San Francisco, CA 94104 | Oil & Gas Operator | Apr 2009 |
| 946 | Petro Harvester Operating Company, LLC | | Oil & Gas Operator | Nov 2022 |
| 947 | Petro Hi-Tech, Inc. | Pasadena, TX 77505 | Oil & Gas Operator | Feb 2008 |
| 948 | Petro Holdings, Inc. | Spencer, WV 25276-0000 | Oil & Gas Operator | Dec 2021 |
| 949 | Petro Hunt Inc Of Kentucky | | Oil & Gas Operator | Dec 2006 |
| 950 | Petro Lions, LLC | Somerset, TX 78069 | Oil Operator | Feb 2026 |
| 951 | Petro Locators I | | Oil & Gas Operator | Dec 1995 |
| 952 | Petro Locators, Inc. | Pratt, KS 67124 | Oil & Gas Operator | Sep 2025 |
| 953 | Petro Mex Resources | | Oil & Gas Operator | Dec 2025 |
| 954 | Petro Mex, LLC | Farmington, NM 87499 | Oil & Gas Operator | Jan 2026 |
| 955 | Petro North LTD | Smethport, PA 16749-0742 | Oil & Gas Operator | Dec 2025 |
| 956 | Petro Nova | | Oil Operator | Dec 2000 |
| 957 | Petro Oil Produc | | Oil Operator | Aug 1989 |
| 958 | Petro Oilfield Equipment Inc | Drumright, OK 74030-1233 | Oil & Gas Operator | Dec 2010 |
| 959 | Petro Operating Company | | Oil & Gas Operator | Dec 2024 |
| 960 | Petro Operating Company LLC | | Oil & Gas Operator | Dec 2025 |
| 961 | Petro Pak Corpor | | Oil Operator | Aug 1988 |
| 962 | Petro Plex Oil Co Inc. | Homosassa, FL 34448 | Oil & Gas Operator | Jul 2020 |
| 963 | Petro Producers Corporation | | Oil & Gas Operator | Mar 1993 |
| 964 | Petro Productions,Petrotec Production,Inc Dba | Wichita, KS 67202 | Oil Operator | Aug 1993 |
| 965 | Petro Quest Inc | Guysville, OH 45735 | Oil & Gas Operator | Dec 2024 |
| 966 | Petro Resources, Inc. | Fulton, TX 78358 | Oil & Gas Operator | Feb 2026 |
| 967 | Petro River Operating, LLC | New York City, NY 10017 | Oil & Gas Operator | Jul 2011 |
| 968 | Petro Search Exploration Corp | | Oil & Gas Operator | May 1993 |
| 969 | Petro Speed Inc | Norman, OK 73069-8116 | Oil & Gas Operator | Mar 2015 |
| 970 | Petro SVC Partners Inc | Indiana, PA 15701-8556 | Oil & Gas Operator | Dec 2025 |
| 971 | Petro Valley Ser | | Gas Operator | Dec 1986 |
| 972 | Petro Ventures Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2019 |
| 973 | Petro Vest Operating LLC | | Oil Operator | Aug 2013 |
| 974 | Petro Vest, Inc. | Houston, TX 77046 | Oil & Gas Operator | Sep 2014 |
| 975 | Petro Warrior LLC | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 976 | Petro X Energy L | | Oil & Gas Operator | May 1986 |
| 977 | Petro-Assets Corporation | | Oil & Gas Operator | Feb 2000 |
| 978 | Petro-Beth Oil & Gas, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2006 |
| 979 | Petro-Can, Inc. | | Oil & Gas Operator | Apr 1998 |
| 980 | Petro-Canada Resources (USA) | | Oil & Gas Operator | Dec 2009 |
| 981 | Petro-Canada Resources (USA) Inc | Denver, CO 80202-472 | Oil & Gas Operator | Feb 2010 |
| 982 | Petro-Chase Energy Corp | Oklahoma City, OK 73135-6205 | Oil & Gas Operator | Jan 2007 |
| 983 | Petro-Chem Operating Company, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Feb 2026 |
| 984 | Petro-Flow, Inc | | Gas Operator | Dec 2023 |
| 985 | Petro-Go, Inc. | | Oil & Gas Operator | Mar 1996 |
| 986 | Petro-Guard Company, Inc. | Houston, TX 77057 | Oil & Gas Operator | Nov 2014 |
| 987 | Petro-Guard Production,L.L.C. | Houston, TX 77063 | Oil & Gas Operator | Dec 2024 |
| 988 | Petro-Haley | Borger, TX 79008 | Oil & Gas Operator | Feb 2026 |
| 989 | Petro-Hunt Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 2003 |
| 990 | Petro-Hunt Dakota, LLC | | Oil & Gas Operator | Dec 2025 |
| 991 | Petro-Hunt Permian, LLC | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |
| 992 | Petro-Hunt, L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |
| 993 | Petro-Lewis Corp. | | Oil & Gas Operator | Feb 1994 |
| 994 | Petro-Lud Inc. | | Oil & Gas Operator | Dec 2025 |
| 995 | Petro-Mac Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2025 |
| 996 | Petro-Management Assoc., Inc. | Edmond, OK 73083-2346 | Oil & Gas Operator | Jun 2007 |
| 997 | Petro-Management Inc | | Oil Operator | Dec 1998 |
| 998 | Petro-Mark, Inc. | St Petersburg, FL 33701 | Oil & Gas Operator | Dec 2021 |
| 999 | Petro-Met Energy LLC | Edmond, OK 73034-1237 | Oil Operator | Nov 2025 |
| 1000 | Petro-Raider LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |