| TROJAN RESOURCES LLCActive | 22594 | SAPULPA | 25 | 1 |
| TROUP ED T | 18325 | OKLAHOMA CITY | 0 | 0 |
| TROUT DISPOSAL WELL | 9180 | HAMMON | 0 | 0 |
| TROUT DISPOSAL WELL INCActive | 16775 | HAMMON | 2 | 1 |
| TROUTMAN OIL COMPANY | 11198 | DUNCAN | 2 | 2 |
| TROXELL OIL & GAS | 15313 | SHAMROCK | 8 | 2 |
| TROY ENERGY OPERATING LLCActive | 24556 | OKLAHOMA CITY | 149 | 6 |
| TROY ENERGY WESTERN | 16071 | TROY | 2 | 1 |
| TROYER HOWARD E | 17699 | TULSA | 0 | 0 |
| TRP MIDCON LLCActive | 24304 | HOUSTON | 0 | 0 |
| TRP OPERATING LLCActive | 24068 | HOUSTON | 2 | 1 |
| TRP-OK PROPERTIES LLC | 23922 | NORMAN | 6 | 2 |
| TRU OPERATING LLCActive | 22709 | DENTON | 11 | 2 |
| TRUCKERS DISPOSAL INCActive | 15573 | SKIATOOK | 44 | 1 |
| TRUE NORTH DEVELOPMENT LLC | 22713 | STILLWATER | 0 | 0 |
| TRUE PERFORMANCE ADMINISTRATORS LLCActive | 23642 | OKLAHOMA CITY | 9 | 3 |
| TRUEBLOOD RESOURCES INCActive | 17595 | Denver | 67 | 4 |
| TRUEVINE GAS COMPANY | 21395 | ADA | 9 | 8 |
| TRUEVINE OPERATING LLCActive | 22516 | ADA | 24 | 7 |
| TRULUCK ENTERPRISES LLC | 20802 | WICHITA FALLS | 0 | 0 |
| TRUMBULL E E | 19490 | OKLAHOMA CITY | 0 | 0 |
| TRW PRODUCTION INC | 20872 | ENID | 0 | 0 |
| TRYALL INC | 22410 | PORTER | 0 | 0 |
| TSALTA CORPORATION | 15268 | OKLAHOMA CITY | 0 | 0 |
| TUBULAR-EQUIPMENT OPR LLC | 20023 | OKLAHOMA CITY | 0 | 0 |
| TUCKER CHARLES O | 6138 | OKLAHOMA CITY | 0 | 0 |
| TUCKER ENERGY CORPORATION | 12362 | HOUSTON | 2 | 2 |
| TUCKER GARY & DEEDEEActive | 20331 | JENNINGS | 10 | 1 |
| TUCKER GEORGE | 16942 | SAND SPRINGS | 0 | 0 |
| TUCKER JACKIE E | 13637 | COLLINSVILLE | 0 | 0 |
| TUCKER JR W B | 19376 | DALLAS | 1 | 1 |
| TUCKER RON & CO | 17414 | NORMAN | 4 | 2 |
| TUG HILL OPERATING LLC | 23018 | FORT WORTH | 0 | 0 |
| TULSA ENERGY INC | 17730 | TULSA | 4 | 2 |
| TULSA ENERGY PARTNERS LLCActive | 22010 | TULSA | 61 | 16 |
| TULSA MINERALS INC | 16151 | TULSA | 2 | 2 |
| TULSA PETROLEUM CORPORATION | 15552 | TULSA | 0 | 0 |
| TULSA PRODUCTION & EXPLO CO | 12690 | TULSA | 2 | 1 |
| TULSA TEA LLCActive | 24236 | SAPULPA | 3 | 1 |
| TULSA TUBULAR SUPPLY CO INC | 17842 | TULSA | 0 | 0 |
| TULUM CORPORATION | 18281 | OKLAHOMA CITY | 1 | 1 |
| TURK R E | 5323 | BARTLESVILLE | 1 | 1 |
| TURK VERLIN EXPLORATION INC | 17232 | BLACKWELL | 0 | 0 |
| TURLEY M R | 21280 | OKLAHOMA CITY | 0 | 0 |
| TURNBOW JOHN R COMPANY | 20164 | TULSA | 5 | 3 |
| TURNER ENERGY SWD LLC | 22019 | ENID | 0 | 0 |
| TURNER JOHN O | 5458 | DRUMRIGHT | 1 | 1 |
| TURNER M Y | 4483 | ARDMORE | 0 | 0 |
| TURNER OIL COMPANY | 11815 | YALE | 3 | 2 |
| TURNER PROPERTIES LLC | 22618 | ELMORE CITY | 0 | 0 |
| TURNER RANDALL L | 20612 | DUNCAN | 0 | 0 |
| TURNER RESOURCES INCActive | 14608 | HENNESSEY | 20 | 7 |
| TURNER ROUSTABOUT SERV INC | 14824 | HEALDTON | 4 | 1 |
| TURNER TRADING & TRANS CO | 19691 | ELK CITY | 0 | 0 |
| TURNER WILLIAM | 17948 | JENNINGS | 0 | 0 |
| TURNEY CHARLES | 19577 | DUNCAN | 0 | 0 |
| TURNTABLE ENERGY INCActive | 23926 | PONCA CITY | 74 | 4 |
| TURPIN B J | 15072 | BIXBY | 0 | 0 |
| TURPIN LEDON PRODUCTIONActive | 20308 | ADA | 21 | 1 |
| TUSCANY OPERATING LLC | 21823 | OKLAHOMA CITY | 19 | 4 |
| TUTHILL S KEITH & BILL BARBEE | 5655 | AMARILLO | 10 | 4 |
| TWAIN ENERGY LLCActive | 25119 | Tulsa | 627 | 6 |
| TWAY R R INC | 2828 | OKLAHOMA CITY | 0 | 0 |
| TWENTY FIRST CENTURY RES INC | 19993 | LAJOLLA | 1 | 1 |
| TWENTY/TWENTY OIL & GAS INCActive | 15010 | HENNESSEY | 76 | 12 |
| TWILIGHT ENERGY LLCActive | 22983 | Fort Worth | 9 | 1 |
| TWIN EAGLE PETROLEUM CORP | 12165 | TULSA | 7 | 2 |
| TWIN RIVER RESOURCES INC | 20674 | EDMOND | 2 | 1 |
| TWIST CHARLES | 16993 | WANN | 0 | 0 |
| TWISTED OAK OPERATING LLCActive | 22261 | OKLAHOMA CITY | 47 | 5 |
| TWISTED RESOURCES INCActive | 23741 | BLANCHARD | 17 | 9 |
| TWISTER EXPLORATION LLC | 20541 | OKLAHOMA CITY | 6 | 4 |
| TWO FORKS OPERATING LLCActive | 24256 | PONCA CITY | 2 | 1 |
| TWO GEMS COMPANY | 20980 | MCALESTER | 29 | 3 |
| TWO PINES | 15666 | DRUMRIGHT | 17 | 2 |
| TWO STATES EXPLORATION INC | 18665 | BATON ROUGH | 0 | 0 |
| TWO SUNS INC | 17568 | WOODWARD | 1 | 1 |
| TWT OPERATING COMPANY | 6347 | OKLAHOMA CITY | 7 | 7 |
| TX ONSHORE LLC | 22739 | HOUSTON | 0 | 0 |
| TX-OK OIL & GAS COMPANY | 17580 | DALLAS | 0 | 0 |
| TXN ENERGY INC | 11709 | STILLWATER | 0 | 0 |
| TXO PRODUCING PROPERTIES INC | 13818 | OKLAHOMA CITY | 2 | 1 |
| TXO PRODUCTION CORPORATION | 6232 | OKLAHOMA CITY | 314 | 45 |
| TXOK ENERGY RESOURCES COMPANY | 21292 | TULSA | 2 | 1 |
| TYCO PRODUCTION COMPANY/CNG | 15986 | TULSA | 0 | 0 |
| TYLER ENTERPRISES INC | 8345 | BRISTOW | 3 | 1 |
| TYLER PETROLEUM INC | 12980 | INDIANAPOLIS | 2 | 2 |
| TYLER STEVEN L | 13129 | HOMINY | 1 | 1 |
| TYLER VASSIE L | 15830 | HOMINY | 0 | 0 |
| TYSON GARY | 18912 | HOBART | 10 | 1 |
| TYSON OLAN | 2233 | HOBART | 45 | 1 |
| TYTAN OPERATING COMPANY LLC | 20242 | EDMOND | 8 | 3 |
| U S CRUDE LTD | 20741 | REDLAND | 0 | 0 |
| U S DRILLING COMPANY INC | 13549 | HOLDENVILLE | 0 | 0 |
| U S DRILLING COMPANY INC | 20098 | HOLDENVILLE | 0 | 0 |
| U S OPERATING INC | 15770 | TULSA | 0 | 0 |
| U. S. ENERGY DEVELOPMENT CORPORATIONActive | 23402 | FORT WORTH | 21 | 3 |
| U.S. ENERGY PARTNERS LLC | 24928 | Tulsa | 0 | 0 |
| ULLRICH SANDY JActive | 24718 | HASKELL | 2 | 1 |
| UMBERHAM OIL COMPANY INCActive | 2234 | OKLAHOMA CITY | 18 | 1 |
| UMC PETROLEUM CORPORATION | 17889 | DENVER | 20 | 12 |
| UNBRIDLED RESOURCES LLCActive | 23429 | HOUSTON | 1,297 | 6 |
| UNDERWOOD OIL AND GAS LLCActive | 24436 | CHANDLER | 42 | 4 |
| UNDERWOOD PETROLEUM OPERATING LLC | 24993 | Oklahoma City | 2 | 2 |
| UNICON PRODUCING COMPANY | 2048 | HOUSTON | 1 | 1 |
| UNION BANK & TRUST COMPANY | 15455 | BARTLESVILLE | 0 | 0 |
| UNION OIL CO OF CALIFORNIA | 2237 | HOUSTON | 243 | 32 |
| UNION PACIFIC OIL CO INC | 12278 | OKLAHOMA CITY | 0 | 0 |
| UNION TEXAS PETROLEUM CORP | 2238 | HOUSTON | 16 | 6 |
| UNION VALLEY PETROLEUM CORPActive | 12075 | ENID | 45 | 7 |
| UNION VALLEY RESOURCES LTD | 10628 | BETHANY | 4 | 2 |
| UNIT DRILLING & EXPL COMPANY | 6562 | TULSA | 10 | 9 |
| UNIT ENERGY COMPANY | 13548 | TULSA | 1 | 1 |
| UNIT LINER COMPANY | 19986 | SHAWNEE | 0 | 0 |
| UNIT OPERATIONS INC | 2239 | OKLAHOMA CITY | 22 | 11 |
| UNIT PETROLEUM COMPANYActive | 16711 | TULSA | 989 | 38 |
| UNITED ENERGY & EXPL INC | 20313 | ADA | 0 | 0 |
| UNITED ENERGY & EXPLORATION LLCActive | 23479 | ADA | 227 | 6 |
| UNITED ENERGY DEVELOP CO LTD | 10595 | BARTLESVILLE | 13 | 2 |
| UNITED ENERGY OPERATING LLCActive | 23909 | EDMOND | 13 | 8 |
| UNITED OIL CORPORATION | 8295 | DENVER | 61 | 17 |
| UNITED OIL PRODUCERS INC | 14629 | MUSTANG | 0 | 0 |
| UNITED PETROLEUM DEV CORP | 15407 | DALLAS | 1 | 1 |
| UNITED PETROLEUM EXPL INC | 3918 | OKLAHOMA CITY | 0 | 0 |
| UNITED PRIMARY RESOURCES INC | 13852 | MILTON | 1 | 1 |
| UNITED PRODUCERS INC | 22132 | BROKEN ARROW | 5 | 1 |
| UNITED PRODUCTION COMPANY LLCActive | 20068 | EDMOND | 80 | 15 |
| UNITED ROYALTY INC | 14839 | DUNCAN | 0 | 0 |
| UNITED TEXAS PETROLEUM INC | 21039 | MCKINNEY | 0 | 0 |
| UNITED WESTERN ENERGY CORP | 7984 | OKLAHOMA CITY | 1 | 1 |
| UNIVERSAL DRILLING COMPANY | 10260 | DENVER | 139 | 30 |
| UNIVERSAL EXPLORATION INC | 14767 | OKLAHOMA CITY | 2 | 1 |
| UNIVERSAL GAS & OIL DEV CORP | 17508 | SAPULPA | 0 | 0 |
| UNIVERSAL MINERAL CORPORATION | 6137 | DALLAS | 0 | 0 |
| UNIVERSAL WELL SERVICE INC | 21582 | KIEFER | 0 | 0 |
| UNTAMED RESOURCES, LLCActive | 25199 | MIDLAND | 1 | 1 |
| UNTERKIRCHER OIL, LLCActive | 25227 | Okemah | 0 | 0 |
| UPLAND ENERGY LLCActive | 24629 | Canadian | 1 | 1 |
| UPLAND OPERATING LLCActive | 24743 | BOERNE | 22 | 2 |
| UPLAND PRODUCTION COMPANY | 15153 | MIDLAND | 0 | 0 |
| UPLAND RESOURCES INC | 17311 | CANADIAN | 2 | 2 |
| UPLANDS RESOURCES INCActive | 17630 | TULSA | 64 | 5 |
| UPTEX OPERATING LP | 22082 | DALLAS | 0 | 0 |
| URBAN ENERGY COMPANY | 6958 | OVERLAND PARK | 3 | 1 |
| URBAN OIL & GAS GROUP LLCActive | 22756 | PLANO | 146 | 16 |
| URBANA CORPORATION | 4930 | DALLAS | 1 | 1 |
| US DRILLING COMPANY LLC | 24270 | OKLAHOMA CITY | 0 | 0 |
| US ENERGY OPERATING LLC | 24450 | TULSA | 2 | 2 |
| USEDC OKC LLC | 22989 | GETZVILLE | 0 | 0 |
| UTC EXPLORATION COMPANY INC | 11344 | DALLAS | 2 | 1 |
| UTICA DRILLING & EXPL INC | 16245 | TULSA | 0 | 0 |
| UVEST INC | 16445 | BARTLESVILLE | 0 | 0 |
| V & V OIL & GAS CORP | 8415 | MIDWEST CITY | 0 | 0 |
| V S OIL COMPANY INC | 19898 | BURKBURNETT | 1 | 1 |
| VAB INC | 5616 | WELEETKA | 3 | 1 |
| VACA OPERATING COMPANY LLC | 21376 | FORT WORTH | 1 | 1 |
| VACO OIL COMPANY | 8446 | CLEVELAND | 7 | 3 |
| VAIL ENERGY INC | 15120 | OKLAHOMA CITY | 0 | 0 |
| VAL ENERGY INC | 21431 | WICHITA | 1 | 1 |
| VALANCY OPERATING LLCActive | 22800 | GOLDSBY | 11 | 2 |
| VALAR PETROLEUM INC | 17304 | HOUSTON | 0 | 0 |
| VALENCE OPERATING COMPANY | 15945 | KINGWOOD | 0 | 0 |
| VALENCE OPERATING COMPANY | 16529 | KINGWOOD | 0 | 0 |
| VALENCIA RESOURCES & DEVELOPMENT | 16334 | SAUGUS | 0 | 0 |
| VALERO PRODUCING COMPANY | 12649 | SAN ANTONIO | 7 | 1 |
| VALEX PETROLEUM INC | 10560 | DENVER | 2 | 1 |
| VALIDUS ENERGY II MIDCON LLCActive | 24973 | DENVER | 1,265 | 14 |
| VALIDUS INC | 7412 | FORT LAUDERDALE | 15 | 5 |
| VALIDUS MIDSTREAM LLCActive | 24688 | DENVER | 0 | 0 |
| VALIDUS WATER LLCActive | 25251 | Denver | 1 | 1 |
| VALJOHN ENERGY CORPORATIONActive | 21790 | DOVER | 12 | 7 |
| VALL OIL & GAS | 20646 | MARLOW | 0 | 0 |
| VALLEE OIL & GAS CO | 24200 | DUNCAN | 4 | 1 |
| VALLEY DISPOSALS | 16359 | HENNESSY | 0 | 0 |
| VALLEY GATHERING COMPANY | 19687 | MIDLAND | 0 | 0 |
| VALLEY OPERATING CO | 11281 | ENID | 1 | 1 |
| VALLEY PETROL CONSULTING INCActive | 23160 | DENTON | 9 | 3 |
| VALLIQUETTE & MORRIS | 7393 | STROUD | 0 | 0 |
| VALLIQUETTE D L LLC | 23238 | STROUD | 0 | 0 |
| VALOR OPERATING LLC | 22927 | DALLAS | 0 | 0 |
| VALPOINT ENERGY LLC | 23052 | AMARILLO | 0 | 0 |
| VALPOINT OPERATING LLCActive | 23241 | AMARILLO | 22 | 3 |
| VAN DYKE OIL OF OKLA INC | 13580 | SHAWNEE | 0 | 0 |
| VAN HORN I H | 10610 | TULSA | 0 | 0 |
| VAN HORN OIL & GAS INC | 7540 | TULSA | 24 | 8 |
| VAN HORN OIL COMPANY | 12814 | ADA | 12 | 5 |
| VAN HORN OIL LLCActive | 24312 | BARTLESVILLE | 2 | 1 |
| VAN ORSDOL PAULActive | 19753 | BRISTOW | 22 | 3 |
| VAN SCHUYVER BEN | 16065 | WANETTE | 0 | 0 |
| VAN ZANDT MARILYNActive | 24865 | DEPEW | 4 | 1 |
| VANBEBBER OIL & GAS LLC | 23371 | WELLSTON | 0 | 0 |
| VANCE LULA S | 21945 | CRANE | 0 | 0 |
| VANCE RESOURCES INC | 15118 | PERRYTON | 0 | 0 |
| VANCOL OIL CO INC | 6633 | PONCA CITY | 12 | 5 |
| VANDERBILT OIL & GAS INC | 14844 | VINITA | 25 | 8 |
| VANDERBILT RESOURCES CORP | 5039 | MIDLAND | 1 | 1 |
| VANGUARD PERMIAN LLC | 23042 | HOUSTON | 0 | 0 |
| VANISHING WATER LLC | 22969 | OKLAHOMA CITY | 0 | 0 |
| VANN FAMILY OPERATIONS LLCActive | 22295 | Bristow | 8 | 1 |
| VANN MARY L | 19464 | BRISTOW | 2 | 1 |