| 1001 | Rmi Company | Niles, OH 44446 | Oil & Gas Operator | Dec 1984 |
| 1002 | Rocanville Corporation | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 1003 | Rockwell Resources Inc | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2024 |
| 1004 | Rod Johnson Operations | Miramar Beach, FL 32550 | Oil & Gas Operator | Dec 2015 |
| 1005 | Roman Well Services Inc | Lakeville, OH 44638 | Oil & Gas Operator | Dec 2023 |
| 1006 | Ronald A Gibson & Assoc Inc | Avon Lake, OH 44012 | Oil & Gas Operator | Dec 2025 |
| 1007 | Roscoe Gas & Oil Co | Dover, OH 44622 | Oil & Gas Operator | Dec 1991 |
| 1008 | Roulette Energy LLC | Canal Wincheste, OH 43110 | Oil & Gas Operator | Dec 2023 |
| 1009 | Royal Petroleum Prop Inc | Woodville, OH 43469 | Oil & Gas Operator | Dec 1990 |
| 1010 | Royalton Gas & Oil Co | Brunswick, OH 44212 | Oil & Gas Operator | Dec 1990 |
| 1011 | RPJ Fund Management Inc | St. Paul, MN 55101 | Oil & Gas Operator | Dec 1991 |
| 1012 | RRKK LLC | Columbus, OH 43214-3072 | Oil Operator | Dec 2025 |
| 1013 | RSC Energy Corp | Brooklyn HTS, OH 44109 | Oil & Gas Operator | Dec 1984 |
| 1014 | Rubber City Oil & Gas LLC | Louisville, OH 44641 | Oil & Gas Operator | Dec 2025 |
| 1015 | Ruffner Petroleum Corp | Akron, OH 44308 | Oil & Gas Operator | Dec 2000 |
| 1016 | Russell E Snider LLC | Newark, OH 43055 | Oil Operator | Dec 2025 |
| 1017 | S & R Oil Company | Electra, TX 76360 | Oil & Gas Operator | Apr 1993 |
| 1018 | S & S Energy Corp | Henderson, NV 89052 | Oil & Gas Operator | Dec 2016 |
| 1019 | S & S Oil Company | Electra, TX 76360 | Oil & Gas Operator | Jul 2026 |
| 1020 | S S S Energy Co | Stow, OH 44224 | Oil & Gas Operator | Dec 1989 |
| 1021 | Sabre Energy Corporation | Lore City,, OH 43755 | Oil & Gas Operator | Dec 2017 |
| 1022 | Sage Energy Inc | Dublin, OH 43017 | Oil & Gas Operator | Dec 1988 |
| 1023 | Salt Creek JT Venture | Pittsburgh, PA 15219-2702 | Oil & Gas Operator | Dec 1986 |
| 1024 | Samples James F | Brinkhaven, OH 43006 | Oil & Gas Operator | Dec 2021 |
| 1025 | Sananco Energy Corp | Naples, FL 33941 | Oil & Gas Operator | Jul 2013 |
| 1026 | Sandbar Oil & Gas Co | Lewisville, OH 43754 | Oil & Gas Operator | Dec 2025 |
| 1027 | Sandy Supply Co | Wooster, OH 44691 | Oil & Gas Operator | Dec 2014 |
| 1028 | Sanor Bruce | Salem, OH 44460 | Oil & Gas Operator | Dec 2025 |
| 1029 | Sara Jenny Energy Inc | Chesterland, OH 44026 | Oil & Gas Operator | Dec 2025 |
| 1030 | Sardis Gas, LLC | Mineral Wells, WV 26150 | Oil & Gas Operator | Dec 2024 |
| 1031 | Savoy Energy LP | Traverse City, MI 49685-1560 | Oil & Gas Operator | May 2026 |
| 1032 | Scandia Energy Co Inc | Traverse City, MI 49684 | Oil & Gas Operator | Dec 1993 |
| 1033 | Schmelzer Mark | Rushville, OH 43150 | Oil & Gas Operator | Dec 2007 |
| 1034 | Schmelzer Maurice | Bremen, OH 43107 | Oil & Gas Operator | Dec 2025 |
| 1035 | Schmelzer Plugging LLC | Bremen, OH 43107 | Oil & Gas Operator | Dec 2025 |
| 1036 | Schreiner Oil & Gas Inc | Prescott, AZ 86303 | Oil & Gas Operator | Dec 2023 |
| 1037 | Schrimsher Oil & Gas Expl | Orlando, FL 32803 | Oil & Gas Operator | Dec 1992 |
| 1038 | Schultheis Oil & Gas | Whipple, OH 45780 | Oil & Gas Operator | Dec 2023 |
| 1039 | Schwanco Inc | Cleveland, OH 44115 | Oil & Gas Operator | Dec 1987 |
| 1040 | Schweder Richard E | Lakeville, OH 44638 | Oil & Gas Operator | Dec 2009 |
| 1041 | Scion Energy Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2019 |
| 1042 | Scrimgeour Robert | Sterling, VA 22170 | Oil & Gas Operator | Dec 1991 |
| 1043 | Seagull Development Corp | Massillon, OH 44646-7436 | Oil & Gas Operator | Dec 2015 |
| 1044 | Second Oil LTD | McCdlue, OH 43534 | Oil & Gas Operator | Dec 2025 |
| 1045 | Seibert Oil & Gas | Hudson, OH 44236-4430 | Oil & Gas Operator | Dec 1999 |
| 1046 | Seifert Companies LTD | Bremen, OH 43107 | Oil & Gas Operator | Dec 2023 |
| 1047 | Select Energy Investments Inc | Solon, OH 44139 | Oil & Gas Operator | Dec 2019 |
| 1048 | Seneca Energy Corporation | Dover, OH 44622 | Oil & Gas Operator | Dec 2020 |
| 1049 | Seven To One Oil & Gas LLC | Magnolia, OH 44643 | Oil & Gas Operator | Dec 2025 |
| 1050 | Shackelford Oil Co | Midland, TX 79707 | Oil & Gas Operator | Apr 2026 |
| 1051 | Shafer Berman J | Wooster, OH 44691 | Oil & Gas Operator | Dec 2000 |
| 1052 | Shafer David Oil Prod Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2000 |
| 1053 | Shakespeare Oil Co Inc | Salem, IL 62881 | Oil & Gas Operator | Apr 2026 |
| 1054 | Shanahan Donald P | Ridgedale, MO 65739 | Oil & Gas Operator | Dec 1990 |
| 1055 | Sherman Michael | Canton, OH 44735 | Oil & Gas Operator | Dec 2007 |
| 1056 | Shongum Oil & Gas Inc | Akron, OH 44312 | Oil & Gas Operator | Dec 2011 |
| 1057 | Shrider W E Co | Newark, OH 43055 | Oil & Gas Operator | Dec 1991 |
| 1058 | Sidwell Theodore R Jr | Thornville, OH 43076 | Oil & Gas Operator | Dec 1988 |
| 1059 | Simpson B T Jr | Orlando, FL 32806 | Oil & Gas Operator | Dec 1986 |
| 1060 | Skyliner Energy LLC | Ravenna, OH 44266 | Oil & Gas Operator | Dec 2025 |
| 1061 | Skyway Energy LLC | Leesburg, OH 34748 | Oil & Gas Operator | Dec 2020 |
| 1062 | Smail Denny Lee | Harvey, LA 70058 | Oil & Gas Operator | Dec 2025 |
| 1063 | Smith C/Dba Sandy Supply | North FT Myers, FL 33903 | Oil & Gas Operator | Dec 1988 |
| 1064 | Smith Management Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 1992 |
| 1065 | Smith Ronald Dba Chipco | Zanesville, OH 43701 | Oil & Gas Operator | Dec 2025 |
| 1066 | Smith T W | Jeromesville, OH 44840 | Oil Operator | Dec 2016 |
| 1067 | Smithberger John D | Marietta, OH 45750 | Oil & Gas Operator | Dec 2025 |
| 1068 | Snider Brothers | Gratiot, OH 43740 | Oil & Gas Operator | Dec 2015 |
| 1069 | Snider Russell E | Newark, OH 43055 | Oil & Gas Operator | Dec 2014 |
| 1070 | Snyder Oper Partnership | FT Worth, TX 76102 | Gas Operator | Dec 1988 |
| 1071 | Sound Energy Co Inc | Dover, OH 44622 | Oil & Gas Operator | Mar 2026 |
| 1072 | Sours Thomas J | Sharon Center, OH 44274 | Oil & Gas Operator | Dec 2022 |
| 1073 | South Shore Energy LLC | Geneva, OH 44041 | Oil & Gas Operator | Dec 2025 |
| 1074 | Southern Triangle Oil Co | MT Carmel, IL 62863 | Oil & Gas Operator | Dec 2024 |
| 1075 | Sowers William & Sara | Blue Rock, OH 43720 | Oil Operator | Dec 2022 |
| 1076 | Sparks Harold | Radnor, OH 43066 | Oil & Gas Operator | Dec 1987 |
| 1077 | Sparta Energy Corp | Oak Brook, IL 60521 | Oil & Gas Operator | Dec 1985 |
| 1078 | Spectrum Oil Corporation | Marietta, OH 45750 | Oil & Gas Operator | Dec 1993 |
| 1079 | Spencer Petroleum Corp | Akron, OH 44319 | Oil & Gas Operator | Dec 2000 |
| 1080 | Spencer Resources Inc | Richmond, VA 23225 | Oil & Gas Operator | Dec 1993 |
| 1081 | Spiller, H. G. | San Antonio, TX 78213 | Oil & Gas Operator | Oct 1993 |
| 1082 | Spring Industries Inc | Wellington, FL 33414 | Oil & Gas Operator | Dec 2016 |
| 1083 | Springer Energy Company, LLC | Akron, OH 44313 | Oil & Gas Operator | Dec 2025 |
| 1084 | St Croix LTD | Fairlawn, OH 44334 | Oil & Gas Operator | Dec 2022 |
| 1085 | St. Clair Oil Co. | St Clairsville, OH 43950 | Oil & Gas Operator | Dec 1997 |
| 1086 | Stach Enterprises LLC | Nashport, OH 43830 | Oil & Gas Operator | Dec 2021 |
| 1087 | Stachler William L | Danville, OH 43014 | Oil & Gas Operator | Dec 1989 |
| 1088 | Stackhouse Construction Inc | Orwell, OH 44076 | Oil & Gas Operator | Dec 2025 |
| 1089 | Standard Oil Co Of WV | Walton, WV 25286 | Oil & Gas Operator | Dec 2024 |
| 1090 | Standby Farms | Louisville, OH 44641 | Oil & Gas Operator | Dec 2025 |
| 1091 | Star Expl Corp | Columbus, OH 43229 | Oil & Gas Operator | Dec 1988 |
| 1092 | Star Oil & Gas | Ben Bolt, TX 78342 | Oil & Gas Operator | Jul 2026 |
| 1093 | Star Oil And Gas LTD | Racine, OH 45771 | Oil & Gas Operator | Dec 2024 |
| 1094 | Statoil USA Onshore Properties Inc | Austin, TX 78730 | Oil & Gas Operator | Jun 2018 |
| 1095 | Stevens Oil & Gas LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2025 |
| 1096 | Stewart Drilling Co. Inc | Lancaster, OH 43130 | Oil & Gas Operator | Dec 1990 |
| 1097 | Stewart Producers | Lancaster, OH 43130 | Oil & Gas Operator | Dec 1984 |
| 1098 | Stocker & Sitler Inc | Columbus, OH 43214 | Oil & Gas Operator | Dec 2002 |
| 1099 | Stone Creek Brick Co | Stone Creek, OH 43840 | Oil & Gas Operator | Dec 2004 |
| 1100 | Stonebridge Operating Co LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2025 |