| 701 | New Lift Inc | Nowata, OK 74048-0245 | Oil & Gas Operator | Mar 2015 |
| 702 | Nexus Resources Corporation | Drumright, OK 74030 | Oil & Gas Operator | Jan 2013 |
| 703 | Nielson & Associates, Inc | Cody, WY 82414 | Oil & Gas Operator | Feb 2016 |
| 704 | NM&O Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 705 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Jun 2026 |
| 706 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | Jun 2026 |
| 707 | Noble Resources Inc | Mannford, OK 74044 | Oil & Gas Operator | Mar 2026 |
| 708 | Nordstrand Engineering Inc | Houston, TX 77019 | Oil & Gas Operator | Jun 2026 |
| 709 | North Canadian Production LLC | Okemah, OK 74859 | Oil & Gas Operator | Feb 2026 |
| 710 | North Star Petroleum Corp. | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1993 |
| 711 | NS Oil LLC | Minneapolis, MN 55410 | Oil Operator | Feb 2026 |
| 712 | NWM Properties LLC | Tulsa, OK 74131-4426 | Oil Operator | Feb 2026 |
| 713 | Nyc Resources LTD | Tulsa, OK 74133-5700 | Oil & Gas Operator | Sep 2014 |
| 714 | O'Donnell Bill C | Tulsa, OK 74135-4241 | Oil & Gas Operator | Oct 2014 |
| 715 | O'Neal Oil & Gas Co | Fort Worth, TX 76107-1479 | Oil & Gas Operator | Mar 2026 |
| 716 | O7 Saltwater Disposal LLC | Marietta, OK 73448 | Oil Operator | Feb 2026 |
| 717 | Oak Hill Petroleum Corporation | Oklahoma City, OK 73116-5627 | Oil & Gas Operator | Mar 2026 |
| 718 | Oakland Petroleum Oper Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2026 |
| 719 | Octagon Resources LLC | Norman, OK 73071-1295 | Oil & Gas Operator | May 2015 |
| 720 | Oil & Gas Exploration Inc | Cleveland, OK 74020 | Oil & Gas Operator | Aug 2013 |
| 721 | Oil Center Operating Inc | Fort Worth, TX 76102-5108 | Oil & Gas Operator | Apr 2014 |
| 722 | Oil Pool Inc | Tulsa, OK 74132-2659 | Oil & Gas Operator | Mar 2026 |
| 723 | Oil Recovery Systems Inc | Tulsa, OK 74145-4619 | Oil & Gas Operator | Feb 2026 |
| 724 | Oil State Petroleum Inc | Jennings, OK 74038 | Oil & Gas Operator | Mar 2026 |
| 725 | Oilco Energy Inc | Duncan, OK 73533 | Oil & Gas Operator | Mar 2015 |
| 726 | Oilfield Operating Company | Cushing, OK 74023-1347 | Oil & Gas Operator | Jan 2018 |
| 727 | Oilton Petroleum Inc | Oilton, OK 74052-0459 | Oil & Gas Operator | Oct 2001 |
| 728 | Okie Crude Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2026 |
| 729 | Okie Oil Inc | Sapulpa, OK 74067-0290 | Oil & Gas Operator | Mar 2011 |
| 730 | Oklahoma Crude Inc | Morris, OK 74445 | Oil & Gas Operator | Feb 2026 |
| 731 | Oklahoma Gas & Oil Corp | | Oil Operator | Oct 2018 |
| 732 | Oklahoma Liquid Resources Inc | Collinsville, OK 74021 | Oil & Gas Operator | Feb 2026 |
| 733 | Oklahoma Natural Resources Inc | Woodward, OK 73801 | Oil & Gas Operator | Sep 1996 |
| 734 | Oklahoma Oil & Gas MGMT Inc | Edmond, OK 73083-6786 | Oil & Gas Operator | Feb 2026 |
| 735 | Oklahoma Petroleum MGMT Corp | Tulsa, OK 74119 | Oil & Gas Operator | Jun 1993 |
| 736 | Okmar Oil Company | Marietta, OH 45750 | Oil & Gas Operator | Jun 2005 |
| 737 | Olive Oil & Gas Inc | Jennings, OK 74052 | Oil & Gas Operator | Jan 2026 |
| 738 | Onpoint Oil & Gas, LLC | Oklahoma City, OK 73170 | Oil & Gas Operator | Mar 2026 |
| 739 | Orason Resources Inc | Tulsa, OK 74169-1225 | Oil & Gas Operator | Nov 2006 |
| 740 | Osage Energy Resources LLC | Bartlesville, OK 74005-2527 | Oil & Gas Operator | Mar 2026 |
| 741 | Osage Oil & Transportation Inc | Cleveland, OK 74020 | Oil & Gas Operator | Nov 2000 |
| 742 | Osburn Gerald Dba Ozzy & Son Oil & Gas | Drumright, OK 74030-5467 | Oil Operator | Oct 2020 |
| 743 | Osterhout Phillip L | Drumright, OK 74030-0693 | Oil & Gas Operator | Jan 2014 |
| 744 | Overflow Energy, LLC | Perryton, TX 79070 | Oil & Gas Operator | Jun 2026 |
| 745 | Owens James W | Tulsa, OK 74114-1425 | Oil & Gas Operator | Oct 2022 |
| 746 | P & C Oil Company | Leona, TX 75850 | Oil & Gas Operator | Mar 2026 |
| 747 | P & H Construction Inc | Wewoka, OK 74884 | Oil & Gas Operator | Mar 2026 |
| 748 | P & H Oil & Gas Inc | Stroud, OK 74079 | Oil & Gas Operator | Mar 2026 |
| 749 | P & M Drilling Company Inc | Depew, OK 74028 | Oil & Gas Operator | Dec 2004 |
| 750 | P K & L Oil Properties | Shawnee, OK 74802-0931 | Oil & Gas Operator | Mar 2001 |
| 751 | P-2 Exploraton Co Inc | Pampa, TX 79065-2920 | Oil & Gas Operator | Jun 1996 |
| 752 | Pace Exploration LLC | Tulsa, OK 74133 | Oil & Gas Operator | Nov 2025 |
| 753 | Pak Energy LLC | Calgary, AB T3A-5E8 | Oil Operator | Sep 2022 |
| 754 | Palm Operating LLC | Oklahoma City, OK 73106-5646 | Oil & Gas Operator | Nov 2019 |
| 755 | Panexco Operating LLC | Oklahoma City, OK 73103-2203 | Oil & Gas Operator | Oct 2014 |
| 756 | Pantera Energy Company | Amarillo, TX 79101 | Oil & Gas Operator | Jun 2026 |
| 757 | Paragon Industries Inc | Sapulpa, OK 74066-6987 | Oil Operator | Mar 2026 |
| 758 | Parham Edith | Beggs, OK 74421-2436 | Oil Operator | Oct 2025 |
| 759 | Parker & Parsley Dev Co | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 760 | Parks Bill M | Seminole, OK 74818-1648 | Oil & Gas Operator | Apr 2014 |
| 761 | Parks James L | Edmond, OK 73034 | Oil & Gas Operator | Aug 2005 |
| 762 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 763 | Patina Oklahoma Corp | Duncan, OK 73533-9523 | Oil & Gas Operator | Nov 2014 |
| 764 | Pawnee Oil And Gas, Inc. | Richardson, TX 75083 | Oil & Gas Operator | May 2023 |
| 765 | Payneco Pipeline Company | Yale, OK 74085 | Oil & Gas Operator | Dec 2000 |
| 766 | Paystone Oil Corporation | Tulsa, OK 74105 | Oil Operator | Mar 2009 |
| 767 | Pearl Oil Company | Nichols Hills, OK 73120-1408 | Oil & Gas Operator | Nov 2023 |
| 768 | Pearl Petroleum Inc | Lawton, OK 73501-5821 | Oil & Gas Operator | Jan 2014 |
| 769 | Pedestal Oil Company Inc | Oklahoma City, OK 73101-1522 | Oil & Gas Operator | May 2019 |
| 770 | Pegasus Energy Corporation | Oklahoma City, OK 73162 | Oil & Gas Operator | Mar 2015 |
| 771 | Pemco LLC | Skiatook, OK 74070 | Oil Operator | Mar 2026 |
| 772 | Penn Homa Oil & Gas Co | Edmond, OK 73083 | Oil & Gas Operator | Oct 2013 |
| 773 | Permian Roustabout & Oilfield Services LLC | Blanchard, OK 73010 | Oil & Gas Operator | Feb 2024 |
| 774 | Petco Petroleum Corp | Hinsdale, IL 60521 | Oil & Gas Operator | Feb 2026 |
| 775 | Petro Oilfield Equipment Inc | Drumright, OK 74030-1233 | Oil & Gas Operator | Dec 2010 |
| 776 | Petro-Mac Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2026 |
| 777 | Petro-Management Assoc., Inc. | Edmond, OK 73083-2346 | Oil & Gas Operator | Jun 2007 |
| 778 | Petroleum Capital, L.C. | Dallas, TX 75367 | Oil & Gas Operator | Jun 2026 |
| 779 | Petroleum Explo Prod Inc | Oilton, OK 74052 | Oil & Gas Operator | Jan 2017 |
| 780 | Petroleum Management Prof Inc | Oklahoma City, OK 73120-1848 | Oil & Gas Operator | Apr 2009 |
| 781 | Petroleum Production MGMT., Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Jun 2026 |
| 782 | Petrolia Energy Corporation | Pearland, TX 77581 | Oil Operator | Jan 2024 |
| 783 | Petromark Resources Company | Tulsa, OK 74136 | Oil & Gas Operator | Sep 1993 |
| 784 | Petron Energy Inc | Dallas, TX 75252 | Oil & Gas Operator | Jun 2026 |
| 785 | Phase III Drilling Inc | Wetumka, OK 74883-0333 | Oil & Gas Operator | Feb 2026 |
| 786 | Pilgrim & Smith Inc | Tulsa, OK 74152 | Oil & Gas Operator | Apr 2015 |
| 787 | Pinnacle Corporation (The) | Broken Arrow, OK 74012 | Oil & Gas Operator | Nov 2014 |
| 788 | Pinnacle Exploration & Production Co | Kiefer, OK 74041 | Oil & Gas Operator | Mar 2026 |
| 789 | Pinnacle Operating Company LLC | Tulsa, OK 74137 | Oil & Gas Operator | Mar 2026 |
| 790 | Plains Oil & Gas | Cushing, OK 74023-4819 | Oil & Gas Operator | Jan 2019 |
| 791 | PMD Oil Recovery LLC | Perry, OK 73077 | Oil & Gas Operator | Mar 2026 |
| 792 | Pole Cat Oil Company | Sapulpa, OK 74067 | Oil Operator | Mar 2026 |
| 793 | Pollard Jr G W | Okmulgee, OK 74447 | Oil & Gas Operator | Apr 2015 |
| 794 | Ponder Oil Producers LLC | Okemah, OK 74859 | Oil & Gas Operator | Feb 2026 |
| 795 | Pool, Lloyd Operating | Sandia Park, NM 87047 | Gas Operator | Dec 2013 |
| 796 | Pope Ted & Karen Dba MP Operating | Bristow, OK 74010 | Oil Operator | Mar 2026 |
| 797 | Portfolio Oil Corporation | Oklahoma City, OK 73119 | Oil & Gas Operator | May 2013 |
| 798 | Potter Hammill & Potter Inc. | Beggs, OK 74421-0038 | Oil Operator | Aug 2013 |
| 799 | Pound Robert M | Bristow, OK 74010 | Oil & Gas Operator | Sep 2014 |
| 800 | Powell Jess L | Sapulpa, OK 74066 | Oil & Gas Operator | Dec 2025 |