| CENTRAL CALIFORNIA OIL COMPANY | 7097 | FISH CAMP | 10 | 1 |
| CENTRAL GLASS PRODUCTS INC | 20731 | POCOLA | 1 | 1 |
| CENTRAL MUD SERVICES LLCActive | 23985 | — | 0 | 0 |
| CENTRAL OKLA OIL & GAS CORP | 19028 | OKLAHOMA CITY | 5 | 1 |
| CENTRAL OKLAHOMA DISPOSAL COMPANYActive | 25080 | KINGSTON | 2 | 2 |
| CENTRAL OPERATING COMPANY | 16380 | TULSA | 0 | 0 |
| CENTRAL PETROLEUM INC | 3588 | DRUMRIGHT | 4 | 2 |
| CENTRAL RESOURCES INC | 20053 | DENVER | 4 | 2 |
| CENTREX OPERATING COMPANY | 17067 | TULSA | 34 | 13 |
| CENTROK GAS INC | 9094 | FORT WORTH | 0 | 0 |
| CENTURION OIL INC | 16984 | OKLAHOMA CITY | 1 | 1 |
| CENTURION OILFIELD SERVICES LLCActive | 25161 | Poteau | 52 | 3 |
| CENTURION RESOURCES LLC | 21501 | TULSA | 1 | 1 |
| CENTURY ENVIRONMENTAL, LLCActive | 25099 | Odessa | 0 | 0 |
| CENTURY OIL & GAS COMPANY | 5511 | OKLAHOMA CITY | 1 | 1 |
| CENTURY PETROLEUM | 14137 | NOWATA | 133 | 4 |
| CENTURY PRODUCTION INC | 13305 | DALLAS | 0 | 0 |
| CENTURY RESOURCES INC | 14762 | FREEHOLD | 1 | 1 |
| CEP MID-CONTINENT LLC | 22193 | HOUSTON | 43 | 6 |
| CERRITO PETROLEUM CORPORATION | 15933 | DENVER | 0 | 0 |
| CESSNA CONNIE D | 19930 | KELLYVILLE | 0 | 0 |
| CEWELL ENERGY LLCActive | 23913 | Houston | 97 | 1 |
| CFC OIL INCActive | 18927 | CYRIL | 58 | 3 |
| CH4 ENERGY II LLC | 22813 | FORT WORTH | 5 | 1 |
| CH4 PRODUCTION COMPANY INC | 21440 | TULSA | 1 | 1 |
| CH4MBER TECHNOLOGIES INC.Active | 25136 | Toronto | 1 | 1 |
| CHACKO PROPERTIES LLC | 24230 | YUKON | 1 | 1 |
| CHACO ENERGY COMPANYActive | 18685 | DENVER | 345 | 25 |
| CHAFIN RALPH W | 20005 | CHELSEA | 86 | 1 |
| CHALLENGE OPERATING INC | 14405 | SAND SPRINGS | 6 | 5 |
| CHALLENGE PETROLEUM COMPANY | 12063 | NORMAN | 5 | 2 |
| CHALLENGER CONSTRUCTION INC | 19998 | TULSA | 23 | 1 |
| CHALLENGER MINERALS INC | 8545 | HOUSTON | 0 | 0 |
| CHAMA PETROLEUM CORPORATION | 9197 | OKLAHOMA CITY | 0 | 0 |
| CHAMBERS & HENDRIX OIL & GAS | 15585 | SKIATOOK | 5 | 2 |
| CHAMBERS BEN DActive | 24664 | RUIDOSO | 1 | 1 |
| CHAMBERS PETROLEUM INC | 13138 | HOUSTON | 8 | 6 |
| CHAMELEON ENERGY RESOURCES INC | 12071 | JENKS | 6 | 5 |
| CHAMP OIL COMPANY | 20867 | DENTON | 2 | 2 |
| CHAMPION PRODUCTION CO INC | 15175 | HOUSTON | 0 | 0 |
| CHAMPION RESERVES-CRI INC | 13965 | OKLAHOMA CITY | 2 | 2 |
| CHAMPLIN EXPLORATION INCActive | 4030 | EDMOND | 184 | 26 |
| CHAMPLIN H H (COL) | 5046 | LAWTON | 0 | 0 |
| CHANAL ENERGY CORPORATION | 19106 | CUSHING | 0 | 0 |
| CHANCE OIL COMPANY INCActive | 17094 | ELMORE CITY | 21 | 2 |
| CHANDLER J W | 15652 | BLANCHARD | 0 | 0 |
| CHANEY & COGBURN ROUSTABOUT WELL SERV | 14619 | CEMENT | 10 | 1 |
| CHANEY MICKEY | 16508 | TISHOMINGO | 0 | 0 |
| CHANGO'S L.L.C.Active | 24877 | PERRYTON | 212 | 34 |
| CHANSE ENERGY CORPORATION | 23582 | SHREVEPORT | 0 | 0 |
| CHANSE PETROLEUM CORPORATION | 10957 | NEW YORK | 16 | 4 |
| CHANT PRODUCTION CO LLC | 21720 | STIGLER | 1 | 1 |
| CHANZE OIL CO INCActive | 19284 | Ocate | 8 | 3 |
| CHAPEL OPERATING LLCActive | 22748 | LONE GROVE | 3 | 1 |
| CHAPMAN ENERGY OKLAHOMA INC | 12687 | DALLAS | 6 | 4 |
| CHAPMAN EXPLORATION INC | 393 | TULSA | 0 | 0 |
| CHAPMAN EXPLORATION INC | 4286 | TULSA | 0 | 0 |
| CHAPMAN JIM | 19798 | BRISTOW | 7 | 1 |
| CHAPMAN LETA M ESTATE | 395 | TULSA | 5 | 1 |
| CHAPMAN OIL LLCActive | 25267 | DUNCAN | 0 | 0 |
| CHAPMAN RESOURCES CORPORATION | 8488 | DALLAS | 1 | 1 |
| CHAPPELL A B | 14409 | ARDMORE | 0 | 0 |
| CHAR-OKLA INC | 16125 | CHARLOTTE | 0 | 0 |
| CHARLEY JAMES OIL COMPANY | 20507 | ADA | 0 | 0 |
| CHARLTON OIL & GAS COMPANY | 6743 | MOUNDS | 1 | 1 |
| CHARMAR PETROLEUM | 15565 | BARTLESVILLE | 0 | 0 |
| CHARRO OPERATING LLC | 20443 | FORT WORTH | 4 | 1 |
| CHARTER OAK PRODUCTION CO LLCActive | 21672 | OKLAHOMA CITY | 235 | 24 |
| CHARTER PRODUCTION COMPANY | 19182 | WICHITA | 1 | 1 |
| CHARTER SERVICES LLCActive | 23603 | CUSHING | 0 | 0 |
| CHASE ENERGY COMPANY | 14410 | DALLAS | 0 | 0 |
| CHASE EXPLORATION CORPORATION | 7095 | TULSA | 289 | 1 |
| CHASE PRODUCTION COMPANY | 20172 | PAMPA | 0 | 0 |
| CHASTAIN DIANEActive | 18702 | COFFEYVILLE | 4 | 1 |
| CHASTAIN FREDDIE R | 19717 | HENRYETTA | 0 | 0 |
| CHASTAIN KENNETH | 5558 | WETUMKA | 0 | 0 |
| CHASTAIN LAND & ENERGY LLC | 22714 | WETUMKA | 0 | 0 |
| CHASTAIN TYLER dba GRAVES CREEK ENERGY LLC | 24295 | EDMOND | 1 | 1 |
| CHAT EXPLORATION INC | 16354 | CROWLEY | 0 | 0 |
| CHATAH INC | 14411 | ARDMORE | 0 | 0 |
| CHATHAM & CHATHAM OIL | 8810 | WILSON | 0 | 0 |
| CHATHAM JOHN | 6336 | WILSON | 2 | 1 |
| CHATHAM LISA DBA D & D OPERATING CO | 22120 | SAN DIEGO | 1 | 1 |
| CHATHAM VERDELL | 4226 | RATLIFF CITY | 0 | 0 |
| CHATHAM VICKIE RActive | 17284 | WILSON | 40 | 1 |
| CHEERS PRODUCTION | 10704 | CLEVELAND | 0 | 0 |
| CHELSEA OPERATING COMPANY | 14816 | OKLAHOMA CITY | 0 | 0 |
| CHEMCO INC | 20133 | ENGLEWOOD | 0 | 0 |
| CHEMICAL PUMP & SUPPLY | 11208 | WILSON | 1 | 1 |
| CHEMICAL RESORCES INC | 9176 | TULSA | 0 | 0 |
| CHEMOIL INC | 14819 | SEILING | 0 | 0 |
| CHEN K WENDELL | 18808 | ARLINGTON | 18 | 5 |
| CHENEY KENNETH C | 18529 | PERRY | 0 | 0 |
| CHENHALL BILLY JActive | 20367 | HASKELL | 21 | 1 |
| CHENIERE PETROLEUM CORPORATION | 15438 | MIDLAND | 0 | 0 |
| CHENOWETH BILL J | 16302 | PERRY | 1 | 1 |
| CHER OIL COMPANY LTDActive | 7657 | RIPLEY | 76 | 3 |
| CHERAKAW OIL & GAS INC | 15698 | PONCA CITY | 0 | 0 |
| CHERMAC ENERGY CORPORATION | 12673 | EDMOND | 35 | 12 |
| CHEROCK OIL & GAS | 20232 | MANNFORD | 0 | 0 |
| CHEROKEE DISPOSAL INC | 16358 | NORMAN | 0 | 0 |
| CHEROKEE ENERGY CORPORATION | 7337 | OKLAHOMA CITY | 13 | 4 |
| CHEROKEE EXPLORATION & PRODUCTION INCActive | 21083 | PARK HILL | 1 | 1 |
| CHEROKEE OPERATING COMPANY | 4203 | TULSA | 7 | 6 |
| CHEROKEE PIPELINE CORPORATION | 9169 | EDMOND | 0 | 0 |
| CHEROKEE RESOURCE MGMT | 10411 | STROUD | 50 | 12 |
| CHEROKEE ROYALTIES & MINERALS INCActive | 17576 | DUNCAN | 24 | 7 |
| CHEROKEE SANDS OIL CO INC | 18709 | NOWATA | 3 | 1 |
| CHEROKEE WARRIOR INCActive | 23231 | GARDEN CITY | 5 | 4 |
| CHERRY OIL & GAS CO LLC | 20738 | HOUSTON | 0 | 0 |
| CHERRY WILLIAM H INC | 13741 | OKLAHOMA CITY | 10 | 7 |
| CHESAPEAKE BE LLC | 22052 | OKLAHOMA CITY | 0 | 0 |
| CHESAPEAKE ENO ACQUISITION LLC | 21494 | OKLAHOMA CITY | 0 | 0 |
| CHESAPEAKE EP LLC | 21322 | OKLAHOMA CITY | 0 | 0 |
| CHESAPEAKE EXPLORATION LLC | 21325 | OKLAHOMA CITY | 0 | 0 |
| CHESAPEAKE EXPLORATION LP | 20528 | OKLAHOMA CITY | 0 | 0 |
| CHESAPEAKE FOCUS LLC | 21323 | OKLAHOMA CITY | 0 | 0 |
| CHESAPEAKE GOTHIC CORPORATION | 20530 | OKLAHOMA CITY | 0 | 0 |
| CHESAPEAKE KNAN ACQUISITION LLC | 21324 | OKLAHOMA CITY | 0 | 0 |
| CHESAPEAKE MID-CONTINENT CORP | 20529 | OKLAHOMA CITY | 0 | 0 |
| CHESAPEAKE NFW LP | 21849 | OKLAHOMA CITY | 0 | 0 |
| CHESAPEAKE OIL & GAS INC | 11769 | HENRYETTA | 0 | 0 |
| CHESAPEAKE OPERATING LLCActive | 17441 | OKLAHOMA CITY | 1,974 | 51 |
| CHESAPEAKE PERMIAN LP | 21506 | OKLAHOMA CITY | 0 | 0 |
| CHESAPEAKE PRODUCTION COMPANY | 14730 | OKLAHOMA CITY | 0 | 0 |
| CHESAPEAKE-STAGHORN ACQUISITION LP | 21580 | OKLAHOMA CITY | 0 | 0 |
| CHESNUTT T R & CHESTNUTT | 8237 | PONCA CITY | 0 | 0 |
| CHESSER INC | 21303 | HOLDENVILLE | 0 | 0 |
| CHESTER OIL COMPANYActive | 401 | WETUMKA | 12 | 3 |
| CHEVRON USA INC | 403 | HOUSTON | 0 | 0 |
| CHEVRON USA INCActive | 913 | MIDLAND | 0 | 0 |
| CHEW PETROLEUM CORPORATION | 19437 | LYONS | 0 | 0 |
| CHEW-COAST & SONSActive | 8071 | BARTLESVILLE | 22 | 2 |
| CHEYENNE DRILLING CO INC | 13296 | OKLAHOMA CITY | 0 | 0 |
| CHEYENNE ENERGY SERVICES LLC | 22315 | OKLAHOMA CITY | 0 | 0 |
| CHEYENNE PETROLEUM COMPANY | 5593 | Oklahoma City | 91 | 24 |
| CHEYENNE-MERIDIAN ENERGY CORP | 14412 | HENNESSEY | 0 | 0 |
| CHHABRA - SEAVER LLCActive | 22458 | PLANO | 4 | 2 |
| CHICA OIL COMPANY | 4370 | LAGO VISTA | 11 | 7 |
| CHIEF WELL SERVICE INC | 3739 | DRUMRIGHT | 1 | 1 |
| CHIEFTAIN OIL & GAS COMPANY | 16357 | SEMINOLE | 0 | 0 |
| CHIEFTAIN OIL CO INCActive | 22967 | KIOWA | 10 | 2 |
| CHILCOAT MELVIN | 21024 | ADA | 0 | 0 |
| CHILDERS SR LLOYD E | 10093 | SAND SPRINGS | 1 | 1 |
| CHILDS JOHN W | 16829 | MESQUITE | 0 | 0 |
| CHILES JACK WELL SERVICE | 3733 | ATWOOD | 11 | 2 |
| CHILES ROBERT MORRISActive | 22012 | ALLEN | 10 | 2 |
| CHINN ENERGY, LLCActive | 25088 | BARTLESVILLE | 32 | 1 |
| CHINOOK ENERGY CORP | 13287 | DENVER | 0 | 0 |
| CHISHOLM 11 LLCActive | 25275 | Skiatook | 0 | 0 |
| CHISHOLM OIL AND GAS OPERATING LLCActive | 23991 | TULSA | 404 | 7 |
| CHISHOLM OPERATING LLC | 20640 | OKLAHOMA CITY | 4 | 3 |
| CHISHOLM PRODUCTION LLC | 22907 | DUNCAN | 0 | 0 |
| CHISHOLM TRAIL ENERGY OPS, LLCActive | 25243 | Fort Worth | 160 | 6 |
| CHISHOLM TRAIL OILFIELD SERVICES INCActive | 14497 | CALDWELL | 1 | 1 |
| CHISHOLM TRAIL RESOURCES INC | 20576 | OKLAHOMA CITY | 0 | 0 |
| CHISOS EXPLORATION INC | 15049 | ENID | 9 | 6 |
| CHISUM G H | 7769 | DUNCAN | 5 | 3 |
| CHIVAS TIME INC | 18980 | KINGSTON | 0 | 0 |
| CHIZUM OIL LLCActive | 21860 | Wichita | 37 | 8 |
| CHOATE DISPOSAL SERVICES LLCActive | 23594 | HENNESSEY | 3 | 2 |
| CHOATE KENNY DBA REBOUND OIL CO | 23446 | HELENA | 97 | 16 |
| CHOCKLEY ENERGY LLCActive | 24538 | BEAVER | 11 | 2 |
| CHOCTAW GAS COMPANYActive | 409 | QUINTON | 97 | 3 |
| CHOLLA PETROLEUM INC | 17849 | DALLAS | 7 | 1 |
| CHOLLA PRODUCTION LLC | 20017 | LITTLETON | 2 | 1 |
| CHOWNING OIL LLC | 20414 | BAKERSFIELD | 0 | 0 |
| CHRIS OIL CO | 15699 | ELMORE CITY | 0 | 0 |
| CHRISCO OIL | 17858 | ADA | 2 | 1 |
| CHRISTEVE OIL COMPANY INC | 17194 | SPRING | 0 | 0 |
| CHRISTIAN BOBBY | 23782 | BIXBY | 1 | 1 |
| CHRISTIAN BROS OP CO INC | 19421 | ADA | 1 | 1 |
| CHRISTIAN EXPLORATION INC | 13595 | OKLAHOMA CITY | 1 | 1 |
| CHRISTIE JR C B | 410 | WICHITA FALLS | 5 | 3 |
| CHRISTIE-STEWART DRLG CO | 411 | WICHITA FALLS | 24 | 8 |
| CHRISTY LARRY | 22102 | OKMULGEE | 1 | 1 |
| CHX INC | 12695 | TULSA | 0 | 0 |
| CICADA CRUDE LLCActive | 24836 | SAPULPA | 1 | 1 |
| CICADA PETROLEUM INC | 10594 | SHAWNEE | 1 | 1 |
| CIERTO PRODUCERS INC | 12763 | DALLAS | 2 | 1 |
| CIG RESOURCES COMPANY | 19452 | COLORADO SPRING | 11 | 2 |
| CIGNA ENERGY RESOURCES INC | 14812 | ENGLEWOOD | 27 | 1 |
| CIMAREX ENERGY CO OF COLORADOActive | 3653 | TULSA | 68 | 16 |
| CIMARON OIL & GAS COMPANY OF OKLAHOMA | 20896 | DAVIS | 6 | 2 |
| CIMARRON DRILLING COMPANY | 19712 | PERRY | 0 | 0 |
| CIMARRON ENERGY LLC | 23503 | CRESCENT | 34 | 15 |
| CIMARRON MANAGEMENT CORP | 14503 | JENNINGS | 3 | 1 |
| CIMARRON OIL & GAS INC | 18752 | PERRY | 18 | 8 |
| CIMARRON OIL COMPANY | 4571 | CLEVELAND | 3 | 2 |
| CIMARRON OPERATING COMPANY | 14413 | OKLAHOMA CITY | 61 | 11 |
| CIMARRON PETROLEUM CORPORATION | 6195 | HOUSTON | 129 | 26 |
| CIMARRON PRODUCTION CO INC | 20284 | OKLAHOMA CITY | 8 | 2 |
| CIMARRON RIVER OPERATING COActive | 19947 | MANNFORD | 57 | 3 |
| CIMARRON VALLEY ENERGY INC | 11280 | STILLWATER | 0 | 0 |
| CIMARRON VALLEY EXPLO INC | 6648 | GUTHRIE | 2 | 1 |
| CIMARRON VALLEY RES & DEV INC | 12103 | BROKEN ARROW | 34 | 6 |
| CINCO CERROS DRL'G & EXPL INC | 14414 | HOUSTON | 0 | 0 |
| CINCO NATURAL RESOURCES CORPORATION | 22643 | BLANCHARD | 0 | 0 |
| CINMAR PETROLEUM CORP | 13596 | NORMAN | 0 | 0 |
| CIRCLE 9 RESOURCES LLCActive | 23209 | OKLAHOMA CITY | 733 | 9 |