| $350,000–1 million | DOUBLE M CONSTRUCTION CO, INC. | OKEMAH, OK | BancFirst |
| $350,000–1 million | DOUBLE M CONSTRUCTION CO. INC. | Okemah, OK | BancFirst |
| $2–5 million | DOVE SCHOOLS INC. | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | DOWNTOWN GLASS | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | DOWNTOWN OKLAHOMA CITY INC. | Oklahoma City, OK | BancFirst |
| $150,000–350,000 | DP BYERS COMPANY LLC | MOUNDS, OK | BancFirst |
| $150,000–350,000 | DRAGONFLY ENERGY, INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | DRAGONFLY ENERGY, INC. | Oklahoma City, OK | BancFirst |
| $150,000–350,000 | DREXEL AUTO PAINT & BODY REPAIR LLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | DRILLWORX DIRECTIONAL DRILLING, LLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | DUNSTON'S STEAK HOUSE | DALLAS, TX | BancFirst |
| $350,000–1 million | DUNSTONS STEAK HOUSE | Dallas, TX | BancFirst |
| $150,000–350,000 | DUPREE SPORTS EQUIPMENT CO. INC. | Stillwater, OK | BancFirst |
| $150,000–350,000 | DUPREE SPORTS EQUIPMENT CO., INC | STILLWATER, OK | BancFirst |
| $350,000–1 million | DURBIN LARIMORE & BIALICK PC | Oklahoma City, OK | BancFirst |
| $350,000–1 million | DURBIN LARIMORE & BIALICK, PC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | DYBOU LLC | Dallas, TX | BancFirst |
| $150,000–350,000 | DYBOU LLC | DALLAS, TX | BancFirst |
| $150,000–350,000 | DYBOU TRAVIS MANAGEMENT LLC | Dallas, TX | BancFirst |
| $150,000–350,000 | DYBOU TRAVIS MANAGEMENT, LLC | DALLAS, TX | BancFirst |
| $150,000–350,000 | DYNAMIC GAMING SOLUTIONS, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | EASTERN MANUFACTURING, INC. | HASKELL, OK | BancFirst |
| $350,000–1 million | EASTPOINTE INDUSTRIES, LLC | MUSKOGEE, OK | BancFirst |
| $150,000–350,000 | EBERLE-REAGAN INC | DALLAS, TX | BancFirst |
| $350,000–1 million | EBSCO SPRING CO INC | TULSA, OK | BancFirst |
| $350,000–1 million | EBSCO SPRING COMPANY INC. | Tulsa, OK | BancFirst |
| $350,000–1 million | ECO FAMILY HEALTH CENTER | WETUMKA, OK | BancFirst |
| $350,000–1 million | ECONOMY PHARMACY, INC | MUSKOGEE, OK | BancFirst |
| $1–2 million | EDGE SERVICES, INC. | Woodward, OK | BancFirst |
| $350,000–1 million | EHC EMPLOYEES LLC | Norman, OK | BancFirst |
| $350,000–1 million | EHC EMPLOYEES LLC | NORMAN, OK | BancFirst |
| $150,000–350,000 | EL GATO GORDO LLC | Oklahoma City, OK | BancFirst |
| $150,000–350,000 | EL GATO GORDO LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | EL HUEVO MEXI DINER L.L.C. | Norman, OK | BancFirst |
| $150,000–350,000 | EL HUEVO MEXI DINER, L.L.C. | NORMAN, OK | BancFirst |
| $150,000–350,000 | EL RENO SOD FARM INC | EL RENO, OK | BancFirst |
| $150,000–350,000 | EL TAPATIO CAFE & CATINA IV, INC. | WICHITA FALLS, TX | BancFirst |
| $350,000–1 million | ELASTOMER SPECIALTIES INC. | Wagoner, OK | BancFirst |
| $350,000–1 million | ELASTOMER SPECIALTIES, INC | WAGONER, OK | BancFirst |
| $350,000–1 million | ELEATION FOODS, LLC | KNOXVILLE, TN | BancFirst |
| $150,000–350,000 | ELECTRIC SERVICE COMPANY | Seminole, OK | BancFirst |
| $150,000–350,000 | ELECTRIC SERVICE COMPANY, INC. | SEMINOLE, OK | BancFirst |
| $150,000–350,000 | ELICAT INC | EDMOND, OK | BancFirst |
| $1–2 million | ELK SUPPLY COMPANY, LLC | CLINTON, OK | BancFirst |
| $1–2 million | ELSR MANAGEMENT LLC | Oklahoma City, OK | BancFirst |
| $1–2 million | ELSR MANAGEMENT, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | EMJ WEATHERFORD, INC | CLINTON, OK | BancFirst |
| $150,000–350,000 | EMMAUS BAPTIST CHURCH | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | ENDODONTIC PRACTICE ASSOCIATES PLLC | NORMAN, OK | BancFirst |
| $150,000–350,000 | ENERGY STAFFING SERVICES LLC | Artesia, NM | BancFirst |
| $150,000–350,000 | ENERGY STAFFING SERVICES, LLC | ARTESIA, NM | BancFirst |
| $150,000–350,000 | ENERQUEST OIL AND GAS LLC | Oklahoma City, OK | BancFirst |
| $150,000–350,000 | ENERQUEST OIL AND GAS, LLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | ENERWEST TRADING CO LLC | DUNCAN, OK | BancFirst |
| $350,000–1 million | ENERWEST TRADING CO. LLC | Duncan, OK | BancFirst |
| $150,000–350,000 | ENHANCED COMMUNICATIONS GROUP, L.L.C. | BARTLESVILLE, OK | BancFirst |
| $150,000–350,000 | ENHANCED MINDS INC | BROKEN ARROW, OK | BancFirst |
| $150,000–350,000 | ENHANCED MINDS INC. | Broken Arrow, OK | BancFirst |
| $150,000–350,000 | EPLEY CAPITAL LLC. | HURST, TX | BancFirst |
| $2–5 million | EPWORTH LIVING | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | EQUITY FUNDING LLC | HEALDTON, OK | BancFirst |
| $150,000–350,000 | ES SPEECH LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | ESSEE, INC | NORMAN, OK | BancFirst |
| $150,000–350,000 | ESTELL EXCAVATING INC. | Moore, OK | BancFirst |
| $150,000–350,000 | ESTELL EXCAVATING, INC. | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | ESVCA LLC | Guthrie, OK | BancFirst |
| $150,000–350,000 | EVAN L SHAW | DALLAS, TX | BancFirst |
| $150,000–350,000 | EVANS & DAVIS, PLLC | EDMOND, OK | BancFirst |
| $350,000–1 million | EXCEL FOOD MART INC | Oklahoma City, OK | BancFirst |
| $350,000–1 million | EXCEL FOOD MART INC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | EXCELERON SOFTWARE, LLC | DALLAS, TX | BancFirst |
| $150,000–350,000 | EXCHANGE CLUB CENTER FOR THE PREVENTION OF CHILD ABUSE OF OK | Oklahoma City, OK | BancFirst |
| $150,000–350,000 | EXCHANGE CLUB CENTER OF PREVENTION OF CHILD ABUSE OF OKLAHOM | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | EXECUTIVE HOMES, LLC | TULSA, OK | BancFirst |
| $350,000–1 million | EXPRESS CREDIT AUTO LLC | Oklahoma City, OK | BancFirst |
| $350,000–1 million | EXPRESS CREDIT AUTO LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | EXPRESS CREDIT AUTO OF TULSA, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | EXPRESS DENTAL LABORATORY LLC | NORMAN, OK | BancFirst |
| $150,000–350,000 | EXPRESS MANAGEMENT INC | SHAWNEE, OK | BancFirst |
| $150,000–350,000 | EXTREME ELECTRIC, LLC | BIXBY, OK | BancFirst |
| $350,000–1 million | FACILITATORS: CAMP IRONHORSE INC | TECUMSEH, OK | BancFirst |
| $1–2 million | FAIR TEXAS TITLE LLC | DALLAS, TX | BancFirst |
| $150,000–350,000 | FAIRWAY PARTNERS LLC | DALLAS, TX | BancFirst |
| $150,000–350,000 | FAMILIES FOR EXCELLENCE IN EDUCATION, INC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | FAMILY HEALTHCARE & MINOR EMERGENCY CLINIC, INC. | YUKON, OK | BancFirst |
| $350,000–1 million | FANNING HARPER MARTINSON BRANDT & KUTCHIN, P.C. | DALLAS, TX | BancFirst |
| $350,000–1 million | FARRAR CONSTRUCTION, INC | DOVER, OK | BancFirst |
| $150,000–350,000 | FARRINGTON TRUCK PARTS & REPAIR INC. | Oklahoma City, OK | BancFirst |
| $150,000–350,000 | FARRINGTON TRUCK PARTS AND REP | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | FELLERS, SNIDER, BLANKENSHIP, BAILEY & TIPPENS PC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | FENIX CONSTRUCTORS INC | ARDMORE, OK | BancFirst |
| $150,000–350,000 | FINANCIAL SOFTWARE SYSTEMS, INC. | MOORE, OK | BancFirst |
| $2–5 million | FINLEY AND COOK PLLC | SHAWNEE, OK | BancFirst |
| $150,000–350,000 | FIRST BAPTIST CHURCH OF JENKS | JENKS, OK | BancFirst |
| $350,000–1 million | FIRSTITLE & ABSTRACT SERVICES, LLC | BROKEN ARROW, OK | BancFirst |
| $150,000–350,000 | FITZGERALD AND SONS STEEL LLC | TAHLEQUAH, OK | BancFirst |
| $350,000–1 million | FLAMECO INDUSTRIES INC | TULSA, OK | BancFirst |
| $350,000–1 million | FLAMECO INDUSTRIES INCORPORATED | Tulsa, OK | BancFirst |
| $150,000–350,000 | FLOORS NOW, LLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | FLOYD'S RECREATIONAL VEHICLES LLC | NORMAN, OK | BancFirst |