| $150,000–350,000 | ARDMORE ELECTRIC SUPPLY INC | ARDMORE, OK | BancFirst |
| $350,000–1 million | ARKANSAS-OKLAHOMA RAILROAD, INC. | WILBURTON, OK | BancFirst |
| $350,000–1 million | ARKANSAS-OKLAHOMA RAILROAD, INC. | Wilburton, OK | BancFirst |
| $150,000–350,000 | ARNOLD BROTHERS FOREST PRODUCTS, INC. | ATOKA, OK | BancFirst |
| $350,000–1 million | ARROW WRECKER SERVICE | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | ARROWHEAD ELECTRIC LLC | Tulsa, OK | BancFirst |
| $150,000–350,000 | ARROWHEAD ELECTRIC, LLC | TULSA, OK | BancFirst |
| $350,000–1 million | ASC, INC. | TULSA, OK | BancFirst |
| $150,000–350,000 | ASHTON GRAY LLC | Oklahoma City, OK | BancFirst |
| $350,000–1 million | ASHTON GRAY OFS LLC | Oklahoma City, OK | BancFirst |
| $1–2 million | ASHTON GRAY OFS, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | ASHTON GRAY, LLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | ASPHALT EXPRESS ENTERPRISES, LLC | ARDMORE, OK | BancFirst |
| $150,000–350,000 | ASPIRE MANAGEMENT LLC | MUSKOGEE, OK | BancFirst |
| $150,000–350,000 | ATIP CORP | TULSA, OK | BancFirst |
| $1–2 million | AUDIE PRICE INSPECTION INC | Kingfisher, OK | BancFirst |
| $2–5 million | AUDIE PRICE INSPECTION, INC | KINGFISHER, OK | BancFirst |
| $350,000–1 million | AUTO ADVANTAGE FINANCE LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | AUTO FINANCE USA, LLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | AUTOMATED BUILDING SYSTEMS, INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | AUTOMATED BUILDING SYSTEMS-TULSA, INC. | TULSA, OK | BancFirst |
| $2–5 million | AVIATION TRAINING CONSULTING LLC | Altus, OK | BancFirst |
| $2–5 million | AVIATION TRAINING CONSULTING, LLC | ALTUS, OK | BancFirst |
| $5–10 million | AXH HOLDINGS | TULSA, OK | BancFirst |
| $350,000–1 million | B C CLARK INC. | Oklahoma City, OK | BancFirst |
| $150,000–350,000 | B&B AUTO PARTS & SALVAGE, INC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | B&B FLORIDA EYE CARE, PLLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | B&B FOODS - NORMAN L.L.C. | Norman, OK | BancFirst |
| $150,000–350,000 | B&B FOODS, LLC | EDMOND, OK | BancFirst |
| $150,000–350,000 | B&B FOODS-NORMAN, LLC | NORMAN, OK | BancFirst |
| $350,000–1 million | B.C. CLARK, INC. | OKLAHOMA CITY, OK | BancFirst |
| $1–2 million | B.O.P RAM-BLOCK & IRON RENTALS INC. | Weatherford, OK | BancFirst |
| $1–2 million | B.O.P. RAM-BLOCK & IRON RENTALS, INC. | WEATHERFORD, OK | BancFirst |
| $150,000–350,000 | BACK 40 DESIGN INC | EDMOND, OK | BancFirst |
| $350,000–1 million | BACONE COLLEGE INC | Muskogee, OK | BancFirst |
| $350,000–1 million | BACONE COLLEGE INC | MUSKOGEE, OK | BancFirst |
| $150,000–350,000 | BALLIETS | NICHOLS HILLS, OK | BancFirst |
| $150,000–350,000 | BALLIETS LLC | Nichols Hills, OK | BancFirst |
| $350,000–1 million | BARNETT ELECTRICAL LLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | BARNETT SIGNS INC | MESQUITE, TX | BancFirst |
| $150,000–350,000 | BARNWATER DEVELOPMENT INC | ARDMORE, OK | BancFirst |
| $150,000–350,000 | BAUMAN MACHINE INC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | BAUMAN MACHINE INC. | Oklahoma City, OK | BancFirst |
| $150,000–350,000 | BAZECORP INVESTMENTS INC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | BBM STEEL BUILDINGS INC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | BEALS CUNNINGHAM ADVERTISING AGENCY INC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | BEARWOOD CONCEPTS INC | Tulsa, OK | BancFirst |
| $350,000–1 million | BEARWOOD CONCEPTS, INC. | TULSA, OK | BancFirst |
| $150,000–350,000 | BELFAIR LLC | SHAWNEE, OK | BancFirst |
| $150,000–350,000 | BELFAIR OF MCALESTER LLC | MCALESTER, OK | BancFirst |
| $150,000–350,000 | BELLA STRADA - EDMOND LLC | Edmond, OK | BancFirst |
| $150,000–350,000 | BELLA STRADA - EDMOND, LLC | EDMOND, OK | BancFirst |
| $150,000–350,000 | BELSHE INDUSTRIES, INC. | TECUMSEH, OK | BancFirst |
| $350,000–1 million | BENCHMARK CONSTRUCTION SERVICES LLC | Norman, OK | BancFirst |
| $350,000–1 million | BENCHMARK CONSTRUCTION SERVICES, LLC | NORMAN, OK | BancFirst |
| $150,000–350,000 | BENNETT & MORRIS & ASSOCIATES PC | MADILL, OK | BancFirst |
| $150,000–350,000 | BENNETT-MORRIS & ASSOCIATES L/S PC | Ardmore, OK | BancFirst |
| $150,000–350,000 | BENSON ELECTRIC COMPANY | Ponca City, OK | BancFirst |
| $150,000–350,000 | BEST PHYSICIANS AT HOME INC. | Chandler, OK | BancFirst |
| $150,000–350,000 | BGR&R MANAGEMENT INC. | Oklahoma City, OK | BancFirst |
| $150,000–350,000 | BGR&R MANAGEMENT INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | BIARD RESTAURANT INC | Claremore, OK | BancFirst |
| $150,000–350,000 | BIG RIVER RUNNING COMPANY, LLC | SAINT LOUIS, MO | BancFirst |
| $350,000–1 million | BILCO CORPORATION | LANCASTER, TX | BancFirst |
| $1–2 million | BILLINGSLEY HOLDING CO., LLC | ARDMORE, OK | BancFirst |
| $150,000–350,000 | BILLINGSLEY HYUNDAI OF LAWTON, LLC | LAWTON, OK | BancFirst |
| $1–2 million | BISON METALS TECHNOLOGIES LLC | Shawnee, OK | BancFirst |
| $150,000–350,000 | BISON METALS TECHNOLOGIES, LLC | SHAWNEE, OK | BancFirst |
| $1–2 million | BIXBY TELEPHONE CO. | Bixby, OK | BancFirst |
| $1–2 million | BIXBY TELEPHONE CO. | BIXBY, OK | BancFirst |
| $350,000–1 million | BK EQUIPMENT LLC | Duncan, OK | BancFirst |
| $150,000–350,000 | BK EQUIPMENT, LLC | COMANCHE, OK | BancFirst |
| $350,000–1 million | BKM SOWAN HORAN, LLP | ADDISON, TX | BancFirst |
| $150,000–350,000 | BLACK RAIN GLACIER LLC | Tulsa, OK | BancFirst |
| $150,000–350,000 | BLACKBIRDS INC. | Tulsa, OK | BancFirst |
| $150,000–350,000 | BLACKBIRDS, INC. | TULSA, OK | BancFirst |
| $350,000–1 million | BLISS ELECTRIC INC. | Moore, OK | BancFirst |
| $350,000–1 million | BLISS ELECTRIC, INC. | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | BLT TANKS, L.L.C. | KINGFISHER, OK | BancFirst |
| $150,000–350,000 | BLUE AND GOLD SAUSAGE CO. LLC | JONES, OK | BancFirst |
| $350,000–1 million | BLUE HAVEN POOLS OF OKLAHOMA CITY INC | EDMOND, OK | BancFirst |
| $150,000–350,000 | BLUE RIBBON CHEVROLET INC | OKMULGEE, OK | BancFirst |
| $150,000–350,000 | BLUE RIBBON CHEVROLET OF OKMULGEE INC. | Okmulgee, OK | BancFirst |
| $350,000–1 million | BLUE SKY SUPPLY INC. | Tulsa, OK | BancFirst |
| $1–2 million | BOB HOWARD GERMAN IMPORTS LLC | EDMOND, OK | BancFirst |
| $350,000–1 million | BOB HOWARD JV, LLV | EDMOND, OK | BancFirst |
| $350,000–1 million | BOCKUS PAYNE @ ASSOCIATES ARCHITECTS A PROFESSIONAL CORPORAT | Oklahoma City, OK | BancFirst |
| $150,000–350,000 | BOCKUS, PAYNE & ASSOCIATES ARCHITECTS | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | BOECKMAN FORD | KINGFISHER, OK | BancFirst |
| $150,000–350,000 | BONAVISTA TECHNOLOGIES INC. | Tulsa, OK | BancFirst |
| $150,000–350,000 | BONAVISTA TECHNOLOGIES, INC. | TULSA, OK | BancFirst |
| $150,000–350,000 | BOULEVARD STEAKHOUSE, INC. | EDMOND, OK | BancFirst |
| $350,000–1 million | BRAINERD CHEMICAL CO INC | TULSA, OK | BancFirst |
| $150,000–350,000 | BRAINERD, LLC | TULSA, OK | BancFirst |
| $150,000–350,000 | BRATCO OPERATING COMPANY | DEWEY, OK | BancFirst |
| $350,000–1 million | BRENTWOOD EXTENDED CARE & REHAB LLC | MUSKOGEE, OK | BancFirst |
| $1–2 million | BREWER'S CARPET & DESIGN CNTR. | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | BRIDGECO CONTRACTORS | WELLSTON, OK | BancFirst |
| $350,000–1 million | BRIERLY CORPORATION | TULSA, OK | BancFirst |
| $150,000–350,000 | BRIERLY PLUMBING TECHNOLOGIES | OKLAHOMA CITY, OK | BancFirst |