| 901 | Okie Operating Company, LTD. | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2026 |
| 902 | Oleum Energy LLC | Georgetown, TX 78628 | Oil & Gas Operator | Apr 2026 |
| 903 | Olsen Energy Inc. | Boerne, TX 78006 | Oil & Gas Operator | Sep 2026 |
| 904 | Omimex Petroleum Inc | Fort Worth, TX 76120 | Oil & Gas Operator | Aug 2022 |
| 905 | Oneenergy Partners Operating, LLC | Houston, TX 77019 | Oil & Gas Operator | Nov 2018 |
| 906 | Onshore Royalties LLC | Houston, TX 77269 | Oil & Gas Operator | Jun 2026 |
| 907 | Opal Operating Company LLC | Edmond, OK 73013 | Oil & Gas Operator | Sep 2026 |
| 908 | Orbit Enterprises, Inc. | Lovington, NM 88260 | Oil & Gas Operator | Mar 2015 |
| 909 | Orbit Petroleum, Inc. | Irving, TX 75038 | Oil & Gas Operator | Sep 2010 |
| 910 | Orbrie Luman | Odessa, TX 79761 | Oil & Gas Operator | Apr 2026 |
| 911 | Orion Oil & Gas Prop | Roswell, NM 88202 | Oil & Gas Operator | Apr 1998 |
| 912 | Orla Petco Inc & Hopi Drilling Co | Midland, TX 79702 | Oil Operator | Sep 2004 |
| 913 | Orla Petco, Inc. | Midland, TX 79708 | Oil & Gas Operator | Sep 2026 |
| 914 | Orville S Slaughter Jr | Denver, CO 80205 | Oil & Gas Operator | Aug 2000 |
| 915 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 916 | Osborn Heirs Co | San Antonio, TX 78217 | Oil & Gas Operator | Jul 2026 |
| 917 | Oso Perdido Services LLC | Flatonia, TX 78941 | Oil Operator | Jul 2026 |
| 918 | Ostrich Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 919 | Ovintiv USA Inc. | Denver, CO 80202 | Oil & Gas Operator | Sep 2026 |
| 920 | Owens Pet Inc | Midland, TX 79702 | Oil & Gas Operator | Aug 1995 |
| 921 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Sep 2026 |
| 922 | Oxy USA WTP Limited Partnership | Houston, TX 772104294 | Oil & Gas Operator | Jun 2026 |
| 923 | Ozark Exploration, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Sep 2026 |
| 924 | P & M Petroleum Management | Denver, CO BAD ADDR | Oil & Gas Operator | Apr 2010 |
| 925 | P-R-O Management, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2026 |
| 926 | Paladin Energy Corp. | Dallas, TX 75229 | Oil & Gas Operator | Jul 2017 |
| 927 | Palisades Asset Holding Co LLC | Dallas, TX 75201 | Oil & Gas Operator | Aug 2017 |
| 928 | Paloma Blanca Well Service Inc. | Roswell, NM 88202 | Oil & Gas Operator | Jun 2002 |
| 929 | Paloma Permian Assetco, LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 930 | Paloma Resources Inc | Roswell, NM 88201 | Oil & Gas Operator | Dec 1998 |
| 931 | Pantera Energy Company | Amarillo, TX 79101 | Oil & Gas Operator | Sep 2026 |
| 932 | Parallel Petroleum LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 933 | Parawon Operating LLC | Mobile, AL 36602 | Oil Operator | Oct 2011 |
| 934 | Parish Operating, LLC | Covington, LA 70433 | Oil & Gas Operator | Jul 2026 |
| 935 | Parker & Parker Oil & Gas Inc | Los Lunas, NM 87031 | Oil & Gas Operator | Jul 2017 |
| 936 | Parko Oil | Los Lunas, NM 87031 | Oil & Gas Operator | Jul 2017 |
| 937 | Parrish, H Dwane & Rhonda K | Loco Hills, NM 88255 | Oil & Gas Operator | Apr 2022 |
| 938 | Patina San Juan Incorporated | Farmington, NM 87402 | Oil & Gas Operator | Dec 2007 |
| 939 | Patterson Operating & Pumping Inc Dba/Penerg | Midland, TX 79710 | Oil & Gas Operator | Jul 2018 |
| 940 | Patterson Petroleum LLC | Snyder, TX 79550 | Oil & Gas Operator | Oct 2007 |
| 941 | Pbex Operations, LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 942 | Pecos Operating Company, LLC | Midland, TX 79701 | Oil & Gas Operator | Jun 2021 |
| 943 | Pecos Production Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2005 |
| 944 | Pecos River Op Inc | Roswell, NM 88202 | Oil & Gas Operator | Dec 2020 |
| 945 | Pendragon Energy Partners Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2009 |
| 946 | Pennzenergy Exploration And Production LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2009 |
| 947 | Penroc Oil Corp. | Hobbs, NM 88241 | Oil & Gas Operator | Jun 2026 |
| 948 | Penwell Energy, Inc. | Houston, TX 77057 | Oil & Gas Operator | Sep 2026 |
| 949 | Peoples Energy Production-Texas, L.P. | Houston, TX 77010 | Oil & Gas Operator | Oct 2007 |
| 950 | Percussion Petroleum Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2019 |
| 951 | Permex Petroleum Company, LLC | Dallas, TX 75201 | Oil & Gas Operator | Mar 2024 |
| 952 | Permian Resources Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 953 | Permian Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 954 | Permok Oil Inc | Shawnee Mission, KS 662082110 | Oil & Gas Operator | Feb 2013 |
| 955 | Pete Mills | Midland, TX 79707 | Oil & Gas Operator | Oct 2012 |
| 956 | Petro Energy Inc | Farmington, NM 87499 | Oil & Gas Operator | Sep 2025 |
| 957 | Petro Mex, LLC | Farmington, NM 87499 | Oil & Gas Operator | Aug 2026 |
| 958 | Petrocorp Incorporated | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2021 |
| 959 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 960 | Petroleum Exploration Company LTD., Limited | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2026 |
| 961 | Petroleum Production Management Inc | Shawnee Mission, KS 66202 | Oil & Gas Operator | Nov 2021 |
| 962 | Petroleum Technical Services Co. | Midland, TX 79707 | Oil & Gas Operator | Dec 2004 |
| 963 | Petrolia Energy Corporation | Pearland, TX 77581 | Oil Operator | Jan 2024 |
| 964 | Phillips Petroleum Co NW | Farmington, NM 87401 | Oil & Gas Operator | Dec 2002 |
| 965 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 966 | Phoenix Distributing Corp. | Marlboro, NJ 07746 | Oil & Gas Operator | Mar 2003 |
| 967 | Phoenix Hydrocarbons Operating Corp | Midland, TX 79705 | Oil & Gas Operator | Oct 2022 |
| 968 | PHX Energy, LLC | Artesia, NM 88211 | Oil & Gas Operator | Jul 2026 |
| 969 | Pierce Production Company, LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 970 | Pima Energy, LLC | Knott, TX 79748 | Oil & Gas Operator | Sep 2026 |
| 971 | Pineland Operating Company, LLC | Dallas, TX 75231 | Oil & Gas Operator | Jun 2026 |
| 972 | Pinon Petroleum, Inc. | San Angelo, TX 76903 | Oil & Gas Operator | Apr 2004 |
| 973 | Pioneer Natural Resources USA Inc | Irving, TX 75039 | Oil & Gas Operator | May 2026 |
| 974 | Pioneer Resources Producing, L.P | Irving, TX 75039 | Oil & Gas Operator | Feb 2001 |
| 975 | Pitts Energy Co. | Midland, TX 79707 | Oil & Gas Operator | Sep 2026 |
| 976 | Plains Petroleum Operating Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2014 |
| 977 | Plains Radio Pet Co | Midland, TX 79703 | Oil & Gas Operator | Apr 2023 |
| 978 | Plantation Operating, LLC | Houston, TX 77041 | Oil & Gas Operator | Nov 2011 |
| 979 | Platinum Exploration Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 980 | Platinum Oil Properties, LLC | Greenwood VIllage, CO 80111 | Oil & Gas Operator | Aug 2006 |
| 981 | Playa Minerals & Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Nov 2003 |
| 982 | PNL Operating, LLC | Casper, WY 82602 | Gas Operator | Dec 2022 |
| 983 | Poco Resources LLC | Artesia, NM 88210 | Oil & Gas Operator | Jul 2024 |
| 984 | Pogo Oil & Gas Operating, Inc | Hobbs, NM 88240 | Oil & Gas Operator | Dec 2019 |
| 985 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 986 | Pogo Producing Company LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2026 |
| 987 | Polaris Production Corp. | Midland, TX 79702 | Oil & Gas Operator | Jan 2024 |
| 988 | Ponderosa Petroleum Corporation | Alto, NM 88312 | Oil & Gas Operator | Dec 2017 |
| 989 | Pontotoc Oil Corp. | Midland, TX 79702 | Oil & Gas Operator | Feb 1996 |
| 990 | PPC Operating Company LLC | Houston, TX 77279 | Oil & Gas Operator | Jul 2019 |
| 991 | Prairie Sun,Inc. | Roswell, NM 88201 | Oil & Gas Operator | Jun 2003 |
| 992 | Premier Natural Resources, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2026 |
| 993 | Premier Oil & Gas Inc | Richardson, TX 75083 | Oil & Gas Operator | Jun 2026 |
| 994 | Preston Exploration LLC | Spring, TX 77387 | Oil & Gas Operator | Dec 2014 |
| 995 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | Sep 2026 |
| 996 | Prima Exploration, Inc. | Denver, CO 80206 | Oil & Gas Operator | Jul 2026 |
| 997 | Primal Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2026 |
| 998 | Prime Operating Company | Midland, TX 79705 | Oil & Gas Operator | Sep 2026 |
| 999 | Primero Operating, Inc. | Roswell, NM 88202 | Oil & Gas Operator | Jun 2022 |
| 1000 | Primexx Operating Corporation | Dallas, TX 75206 | Oil & Gas Operator | Mar 2024 |