| 701 | Seaboard Gas Company | Edmond, OK 73034 | Oil & Gas Operator | Feb 1999 |
| 702 | Seaboard Oil Company | Midland, TX 79710 | Oil & Gas Operator | Mar 2008 |
| 703 | Seaboard Operating Co. | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 704 | Seaboard Pipe & Equip. Co. | | Oil & Gas Operator | May 1977 |
| 705 | Seaboard Well Service, Inc. | | Oil & Gas Operator | Jan 1978 |
| 706 | Seabreeze Production Co | Hungerford, TX 77448 | Oil & Gas Operator | Feb 2026 |
| 707 | Seaco Production | Dripping SPGS, TX 78620 | Oil & Gas Operator | Feb 2016 |
| 708 | Seago Operating Co., L.L.C. | Abilene, TX 79608 | Oil & Gas Operator | Oct 2011 |
| 709 | Seago Petroleum, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Feb 2026 |
| 710 | Seagrove Resources LLC | Malakoff, TX 75148 | Oil & Gas Operator | Nov 2025 |
| 711 | Seagull Development Corp | Massillon, OH 44646-7436 | Oil & Gas Operator | Dec 2015 |
| 712 | Seagull Energy Corporation | | Gas Operator | Mar 1987 |
| 713 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 714 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 715 | Seagull Midcon Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 716 | Seagull Operatin | | Oil & Gas Operator | Jul 1995 |
| 717 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 718 | Seahawk Oil & Gas Company | Dallas, TX 75379 | Oil & Gas Operator | Aug 2007 |
| 719 | Seahawk Oil International Inc | Newport Beach, CA 92660 | Oil & Gas Operator | Oct 1997 |
| 720 | Seal Energy Company | | Oil Operator | Dec 2024 |
| 721 | Seal Exploration, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Dec 2006 |
| 722 | Seale, Don R. | Electra, TX 76360 | Oil & Gas Operator | Feb 2026 |
| 723 | Sealexco | | Oil & Gas Operator | Jun 1992 |
| 724 | Sealexco-Crescent Drilling | | Oil & Gas Operator | May 1986 |
| 725 | Seals And Brown Oil Operating | Norman, OK 73072-3020 | Oil & Gas Operator | Sep 2024 |
| 726 | Seals Oil Company | Fox, OK 73435-0222 | Oil & Gas Operator | Nov 2011 |
| 727 | Sean M Sharp LLC | Chalk Hill, PA 15421 | Oil & Gas Operator | Mar 2025 |
| 728 | Seanard Energy Company | Baton Rouge, LA 70808 | Oil & Gas Operator | Jul 2002 |
| 729 | Seaport Inc | Oklahoma City, OK 73131 | Oil & Gas Operator | Nov 2025 |
| 730 | Seaport Natural Gas Co., Inc. | Angola, NY 14006 | Gas Operator | Dec 2024 |
| 731 | Search Drilling Company | Houston, TX 77010 | Oil & Gas Operator | Feb 2001 |
| 732 | Searchers Exploration | Brenham, TX 77833 | Oil Operator | Feb 2026 |
| 733 | Searcy Brothers Inc | Tulsa, OK 74135-0433 | Oil Operator | Jun 2004 |
| 734 | Sears Joe M | Bethany, OK 730084841 | Oil & Gas Operator | May 2013 |
| 735 | Sears M N | Oklahoma City, OK 73143 | Oil & Gas Operator | Apr 2015 |
| 736 | Sears Resources, LLC | | Oil & Gas Operator | Dec 2021 |
| 737 | Seashore Energy, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Feb 2026 |
| 738 | Seattle'S Best Consulting LLC | Austin, TX 78731 | Oil & Gas Operator | Feb 2026 |
| 739 | Seaward Resources Inc. | | Gas Operator | Dec 1984 |
| 740 | Seawide Limited | | Oil & Gas Operator | Jul 1983 |
| 741 | Seay Dennis Regan | | Oil Operator | Jan 2001 |
| 742 | Seay Exploration, Inc. | Midland, TX 79704 | Oil & Gas Operator | Mar 2008 |
| 743 | Seay Oil & Gas, LTD. | Dripping SPGS, TX 78620 | Oil & Gas Operator | Apr 2013 |
| 744 | Sec Production Inc | Edmond, OK 73013-3709 | Oil & Gas Operator | Nov 2025 |
| 745 | Secan Oil Co Inc | | Oil & Gas Operator | May 1987 |
| 746 | Secan Oil Co., Inc.-Pennington | | Oil & Gas Operator | May 1987 |
| 747 | Seco Petroleum Corp | Houston, TX 77290 | Oil & Gas Operator | Jan 1997 |
| 748 | Seco Production Company | Midland, TX 79708 | Oil & Gas Operator | Aug 2003 |
| 749 | Second Oil LTD | McCdlue, OH 43534 | Oil & Gas Operator | Dec 2024 |
| 750 | Second Wind Production Company Inc. | | Oil Operator | Dec 2013 |
| 751 | Secondary Gas Recovery Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 1993 |
| 752 | Secondary Oil Corp., Inc. | Austin, TX 78750 | Oil Operator | Apr 1999 |
| 753 | Secondary Recovery, Inc. | | Oil & Gas Operator | Dec 1991 |
| 754 | Secure Exploration And Production, LLC | | Oil Operator | Aug 2025 |
| 755 | Security Gas And Oil Inc | | Gas Operator | Jul 1989 |
| 756 | Security Pacific National Bank | | Oil Operator | Dec 1990 |
| 757 | Sed Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 758 | Sedalia Energy, LLC | | Oil & Gas Operator | Mar 2018 |
| 759 | Sedco Resources Inc | Kerrville, TX 78029 | Oil & Gas Operator | Feb 2026 |
| 760 | Sedna Energy LLC | Blanchard, OK 73010-8043 | Gas Operator | Apr 2017 |
| 761 | Sedona Oil & Gas Corporation | Dallas, TX 75231 | Oil & Gas Operator | Feb 2026 |
| 762 | See Oil | | Oil Operator | Sep 2025 |
| 763 | Seeco | | Gas Operator | Mar 2016 |
| 764 | Seeco, Inc. | | Gas Operator | Mar 2015 |
| 765 | Seed Group/Aa Drilling | | Oil Operator | Oct 2009 |
| 766 | Seedy Draw LLC | Greenwood VIllage, CO 80111 | Oil Operator | Oct 2025 |
| 767 | Seek Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2026 |
| 768 | Seeker Oil Company II, Inc. | San Antonio, TX 78209 | Oil Operator | Jan 2016 |
| 769 | Seeker Oil Company, Incorporated | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2026 |
| 770 | Seeker, LLC | Newkirk, OK 74647 | Oil & Gas Operator | Nov 2019 |
| 771 | Seel-Mac Oil & Gas LLC | Richardson, TX 75080 | Oil Operator | Jul 2011 |
| 772 | Seeley Oil Company, LLC | Cortez, CO 81321 | Oil & Gas Operator | Dec 2025 |
| 773 | Seelig Oil Corpo | | Oil Operator | Apr 1985 |
| 774 | Seely Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2026 |
| 775 | Seelye, William L. | Plano, TX 75024 | Oil & Gas Operator | Oct 2005 |
| 776 | Seer Operating LLC | Sheridan, WY 82801 | Oil & Gas Operator | Oct 2016 |
| 777 | Seewald, Hughes | Amarillo, TX 79105 | Gas Operator | Jan 1997 |
| 778 | Segars Energy | | Gas Operator | Mar 2001 |
| 779 | Segars Operating | | Gas Operator | Apr 2014 |
| 780 | Segler, Charles | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 781 | Sego Resources Corp | Denver, CO 80293-0621 | Oil & Gas Operator | Dec 1999 |
| 782 | Segrest-Ward Joint Venture | Longview, TX 75606 | Oil & Gas Operator | Jun 2001 |
| 783 | Seguin Pump | Seguin, TX 78155 | Oil & Gas Operator | Sep 2017 |
| 784 | Seguro Oil & Gas Inc | | Oil Operator | Jul 1992 |
| 785 | Seguro Oil And Gas, LLC | Midland, TX 79702 | Oil & Gas Operator | Jul 2024 |
| 786 | Seguro Well Service, Inc. | Gonzales, TX 78629 | Oil & Gas Operator | Feb 2026 |
| 787 | Sei Operating, LLC | Mandeville, LA 70471 | Oil & Gas Operator | Feb 2026 |
| 788 | Seibel Modern MFG. & Welding Corp. | Lancaster, NY 14086 | Gas Operator | Dec 2024 |
| 789 | Seibert Darrel L/Chestnut | Cuyahoga Falls, OH 44224 | Oil & Gas Operator | Dec 1994 |
| 790 | Seibert Oil & Gas | Hudson, OH 44236-4430 | Oil & Gas Operator | Dec 1999 |
| 791 | Seibert Oil, LLC | Macksville, KS 67557 | Oil & Gas Operator | Jul 2025 |
| 792 | Seidler Oil & Gas Operating, LLC | Alvarado, TX 76009 | Oil & Gas Operator | Feb 2026 |
| 793 | Seifert Companies LTD | Bremen, OH 43107 | Oil & Gas Operator | Dec 2023 |
| 794 | Seifert, Timothy M. | Caledonia, NY 14423 | Gas Operator | Dec 2024 |
| 795 | Seiguf Oil Company, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2026 |
| 796 | Seiran E & P Company, LLC | Friendswood, TX 77546 | Oil & Gas Operator | Feb 2026 |
| 797 | Seisgen Exploration, Inc | Houston, TX 77024 | Gas Operator | Aug 2005 |
| 798 | Seisma Drilling Corporation | Wichita Falls, TX 76301 | Oil Operator | Aug 2003 |
| 799 | Seismic Investment Group, Inc. | Houston, TX 77055 | Oil & Gas Operator | Jun 2008 |
| 800 | Seismic Leasing Service | Denver, CO 80216 | Oil & Gas Operator | Aug 2000 |