| 1001 | Ridgeway Resources | Barberton, OH 44203 | Oil & Gas Operator | Dec 2012 |
| 1002 | Ridgway Realty & Land Inc | University Heights, OH 44118-3818 | Oil & Gas Operator | Dec 2019 |
| 1003 | Rinard Petroleum LLC | Newport, OH 45768 | Oil & Gas Operator | Dec 2022 |
| 1004 | River Gas Co | Marietta, OH 45750 | Oil & Gas Operator | Dec 1993 |
| 1005 | River Valley Energy Inc | Little Hocking, OH 45742 | Oil & Gas Operator | Dec 2024 |
| 1006 | Riverside Petroleum & Prod. | Oxford, MS 38655 | Oil & Gas Operator | Dec 2023 |
| 1007 | RMB Corporation | Senecaville, OH 43780 | Oil & Gas Operator | Dec 2016 |
| 1008 | Rmi Company | Niles, OH 44446 | Oil & Gas Operator | Dec 1984 |
| 1009 | Rocanville Corporation | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 1010 | Rockwell Resources Inc | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2024 |
| 1011 | Rod Johnson Operations | Miramar Beach, FL 32550 | Oil & Gas Operator | Dec 2015 |
| 1012 | Roman Well Services Inc | Lakeville, OH 44638 | Oil & Gas Operator | Dec 2023 |
| 1013 | Ronald A Gibson & Assoc Inc | Avon Lake, OH 44012 | Oil & Gas Operator | Dec 2024 |
| 1014 | Roscoe Gas & Oil Co | Dover, OH 44622 | Oil & Gas Operator | Dec 1991 |
| 1015 | Roulette Energy LLC | Canal Wincheste, OH 43110 | Oil & Gas Operator | Dec 2023 |
| 1016 | Royal Petroleum Prop Inc | Woodville, OH 43469 | Oil & Gas Operator | Dec 1990 |
| 1017 | Royalton Gas & Oil Co | Brunswick, OH 44212 | Oil & Gas Operator | Dec 1990 |
| 1018 | RPJ Fund Management Inc | St. Paul, MN 55101 | Oil & Gas Operator | Dec 1991 |
| 1019 | RRKK LLC | Columbus, OH 43214-3072 | Oil Operator | Dec 2024 |
| 1020 | RSC Energy Corp | Brooklyn HTS, OH 44109 | Oil & Gas Operator | Dec 1984 |
| 1021 | Rubber City Oil & Gas LLC | Louisville, OH 44641 | Oil & Gas Operator | Dec 2024 |
| 1022 | Ruffner Petroleum Corp | Akron, OH 44308 | Oil & Gas Operator | Dec 2000 |
| 1023 | Russell E Snider LLC | Newark, OH 43055 | Oil Operator | Dec 2024 |
| 1024 | S & R Oil Company | Electra, TX 76360 | Oil & Gas Operator | Apr 1993 |
| 1025 | S & S Energy Corp | Henderson, NV 89052 | Oil & Gas Operator | Dec 2016 |
| 1026 | S & S Oil Company | Electra, TX 76360 | Oil & Gas Operator | Aug 2025 |
| 1027 | S S S Energy Co | Stow, OH 44224 | Oil & Gas Operator | Dec 1989 |
| 1028 | Sabre Energy Corporation | Lore City,, OH 43755 | Oil & Gas Operator | Dec 2017 |
| 1029 | Sage Energy Inc | Dublin, OH 43017 | Oil & Gas Operator | Dec 1988 |
| 1030 | Salt Creek JT Venture | Pittsburgh, PA 15219-2702 | Oil & Gas Operator | Dec 1986 |
| 1031 | Samples James F | Brinkhaven, OH 43006 | Oil & Gas Operator | Dec 2021 |
| 1032 | Sananco Energy Corp | Naples, FL 33941 | Oil & Gas Operator | Jul 2013 |
| 1033 | Sandbar Oil & Gas Co | Lewisville, OH 43754 | Oil & Gas Operator | Dec 2024 |
| 1034 | Sandy Supply Co | Wooster, OH 44691 | Oil & Gas Operator | Dec 2014 |
| 1035 | Sanor Bruce | Salem, OH 44460 | Oil & Gas Operator | Dec 2024 |
| 1036 | Sara Jenny Energy Inc | Chesterland, OH 44026 | Oil & Gas Operator | Dec 2024 |
| 1037 | Sardis Gas, LLC | Mineral Wells, WV 26150 | Oil & Gas Operator | Dec 2024 |
| 1038 | Savoy Energy LP | Traverse City, MI 49685-1560 | Oil & Gas Operator | May 2025 |
| 1039 | Scandia Energy Co Inc | Traverse City, MI 49684 | Oil & Gas Operator | Dec 1993 |
| 1040 | Schmelzer Mark | Rushville, OH 43150 | Oil & Gas Operator | Dec 2007 |
| 1041 | Schmelzer Maurice | Bremen, OH 43107 | Oil & Gas Operator | Dec 2024 |
| 1042 | Schmelzer Plugging LLC | Bremen, OH 43107 | Oil & Gas Operator | Dec 2024 |
| 1043 | Schreiner Oil & Gas Inc | Prescott, AZ 86303 | Oil & Gas Operator | Dec 2023 |
| 1044 | Schrimsher Oil & Gas Expl | Orlando, FL 32803 | Oil & Gas Operator | Dec 1992 |
| 1045 | Schultheis Oil & Gas | Whipple, OH 45780 | Oil & Gas Operator | Dec 2023 |
| 1046 | Schwanco Inc | Cleveland, OH 44115 | Oil & Gas Operator | Dec 1987 |
| 1047 | Schweder Richard E | Lakeville, OH 44638 | Oil & Gas Operator | Dec 2009 |
| 1048 | Scion Energy Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2019 |
| 1049 | Scrimgeour Robert | Sterling, VA 22170 | Oil & Gas Operator | Dec 1991 |
| 1050 | Seagull Development Corp | Massillon, OH 44646-7436 | Oil & Gas Operator | Dec 2015 |
| 1051 | Seibert Darrel L/Chestnut | Cuyahoga Falls, OH 44224 | Oil & Gas Operator | Dec 1994 |
| 1052 | Seibert Oil & Gas | Hudson, OH 44236-4430 | Oil & Gas Operator | Dec 1999 |
| 1053 | Seifert Companies LTD | Bremen, OH 43107 | Oil & Gas Operator | Dec 2023 |
| 1054 | Select Energy Investments Inc | Solon, OH 44139 | Oil & Gas Operator | Dec 2019 |
| 1055 | Seneca Energy Corporation | Dover, OH 44622 | Oil & Gas Operator | Dec 2020 |
| 1056 | Seven To One Oil & Gas LLC | Magnolia, OH 44643 | Oil & Gas Operator | Dec 2024 |
| 1057 | Shackelford Oil Co | Midland, TX 79707 | Oil & Gas Operator | May 2025 |
| 1058 | Shafer Berman J | Wooster, OH 44691 | Oil & Gas Operator | Dec 2000 |
| 1059 | Shafer David Oil Prod Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2000 |
| 1060 | Shakespeare Oil Co Inc | Salem, IL 62881 | Oil & Gas Operator | May 2025 |
| 1061 | Shanahan Donald P | Ridgedale, MO 65739 | Oil & Gas Operator | Dec 1990 |
| 1062 | Sherman Michael | Canton, OH 44735 | Oil & Gas Operator | Dec 2007 |
| 1063 | Shongum Oil & Gas Inc | Akron, OH 44312 | Oil & Gas Operator | Dec 2011 |
| 1064 | Shrider W E Co | Newark, OH 43055 | Oil & Gas Operator | Dec 1991 |
| 1065 | Sidwell Theodore R Jr | Thornville, OH 43076 | Oil & Gas Operator | Dec 1988 |
| 1066 | Simpson B T Jr | Orlando, FL 32806 | Oil & Gas Operator | Dec 1986 |
| 1067 | Skyliner Energy LLC | Ravenna, OH 44266 | Oil & Gas Operator | Dec 2024 |
| 1068 | Skyway Energy LLC | Leesburg, OH 34748 | Oil & Gas Operator | Dec 2020 |
| 1069 | Smail Denny Lee | Harvey, LA 70058 | Oil & Gas Operator | Dec 2024 |
| 1070 | Smith C/Dba Sandy Supply | North FT Myers, FL 33903 | Oil & Gas Operator | Dec 1988 |
| 1071 | Smith Management Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 1992 |
| 1072 | Smith Ronald Dba Chipco | Zanesville, OH 43701 | Oil & Gas Operator | Dec 2024 |
| 1073 | Smith T W | Jeromesville, OH 44840 | Oil Operator | Dec 2016 |
| 1074 | Smithberger John D | Marietta, OH 45750 | Oil & Gas Operator | Dec 2024 |
| 1075 | Smucker Ronald O | Somerset, OH 43783 | Oil & Gas Operator | Dec 2003 |
| 1076 | Snider Brothers | Gratiot, OH 43740 | Oil & Gas Operator | Dec 2015 |
| 1077 | Snider Russell E | Newark, OH 43055 | Oil & Gas Operator | Dec 2014 |
| 1078 | Snyder Oper Partnership | FT Worth, TX 76102 | Gas Operator | Dec 1988 |
| 1079 | Sound Energy Co Inc | Dover, OH 44622 | Oil & Gas Operator | Mar 2025 |
| 1080 | Sours Thomas J | Sharon Center, OH 44274 | Oil & Gas Operator | Dec 2022 |
| 1081 | South Shore Energy LLC | Geneva, OH 44041 | Oil & Gas Operator | Dec 2024 |
| 1082 | Southern Triangle Oil Co | MT Carmel, IL 62863 | Oil & Gas Operator | Dec 2023 |
| 1083 | Sowers William & Sara | Blue Rock, OH 43720 | Oil Operator | Dec 2022 |
| 1084 | Sparks Harold | Radnor, OH 43066 | Oil & Gas Operator | Dec 1987 |
| 1085 | Sparta Energy Corp | Oak Brook, IL 60521 | Oil & Gas Operator | Dec 1985 |
| 1086 | Spectrum Oil Corporation | Marietta, OH 45750 | Oil & Gas Operator | Dec 1993 |
| 1087 | Spencer Petroleum Corp | Akron, OH 44319 | Oil & Gas Operator | Dec 2000 |
| 1088 | Spencer Resources Inc | Richmond, VA 23225 | Oil & Gas Operator | Dec 1993 |
| 1089 | Spiller, H. G. | San Antonio, TX 78213 | Oil & Gas Operator | Oct 1993 |
| 1090 | Spring Industries Inc | Wellington, FL 33414 | Oil & Gas Operator | Dec 2016 |
| 1091 | Springer Energy Company, LLC | Akron, OH 44313 | Oil & Gas Operator | Dec 2024 |
| 1092 | St Croix LTD | Fairlawn, OH 44334 | Oil & Gas Operator | Dec 2022 |
| 1093 | St. Clair Oil Co. | St Clairsville, OH 43950 | Oil & Gas Operator | Dec 1997 |
| 1094 | Stach Enterprises LLC | Nashport, OH 43830 | Oil & Gas Operator | Dec 2021 |
| 1095 | Stachler William L | Danville, OH 43014 | Oil & Gas Operator | Dec 1989 |
| 1096 | Stackhouse Construction Inc | Orwell, OH 44076 | Oil & Gas Operator | Dec 2024 |
| 1097 | Standard Oil Co Of WV | Walton, WV 25286 | Oil & Gas Operator | Dec 2023 |
| 1098 | Standby Farms | Louisville, OH 44641 | Oil & Gas Operator | Dec 2024 |
| 1099 | Star Expl Corp | Columbus, OH 43229 | Oil & Gas Operator | Dec 1988 |
| 1100 | Star Oil & Gas | Ben Bolt, TX 78342 | Oil & Gas Operator | Aug 2025 |