| $150,000–350,000 | CLM CONSTRUCTION LLC | Shawnee, OK | BancFirst |
| $150,000–350,000 | CLM CONSTRUCTION LLC | SHAWNEE, OK | BancFirst |
| $350,000–1 million | COCKRELL EYECARE CENTER, INC | STILLWATER, OK | BancFirst |
| $150,000–350,000 | COLDIRON COMPANIES | EDMOND, OK | BancFirst |
| $350,000–1 million | COLDIRON COMPANIES INC. | Edmond, OK | BancFirst |
| $350,000–1 million | COMANCHE NATION CONSTRUCTION LLC | LAWTON, OK | BancFirst |
| $350,000–1 million | COMANCHE NATION CONSTRUCTION LLC | Oklahoma City, OK | BancFirst |
| $350,000–1 million | COMANCHE NATION INDIAN TRIBE | LAWTON, OK | BancFirst |
| $350,000–1 million | COMFORTWORKS, INC. | Oklahoma City, OK | BancFirst |
| $350,000–1 million | COMFORTWORKS, INC. | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | COMMANCHE LUMBER COMPANY, INC. | LAWTON, OK | BancFirst |
| $150,000–350,000 | COMMERCIAL GLASS AND MATERIALS, INC. | NORMAN, OK | BancFirst |
| $150,000–350,000 | COMMERCIAL LINEN SUPPLY INC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | COMMERCIAL LINEN SUPPLY INC | Oklahoma City, OK | BancFirst |
| $150,000–350,000 | COMMERCIALINSURANCE.NET, LLC | NORMAN, OK | BancFirst |
| $1–2 million | COMMUNITY ACCESS, INC. | LAWTON, OK | BancFirst |
| $1–2 million | COMMUNITY ACTION DEVELOPMENT CORPORATION | FREDERICK, OK | BancFirst |
| $1–2 million | COMMUNITY HEALTH CENTERS, INC. | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | COMMUNITY WORKS, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | COMPLETE LAWN MAINTENNACE INC | BROKEN ARROW, OK | BancFirst |
| $150,000–350,000 | COMPLETE REHAB LLC | YUKON, OK | BancFirst |
| $5–10 million | COMPSOURCE MUTUAL INSURANCE COMPANY | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | CONNER L HELMS & ASSOCIATES | OKLAHOMA CITY, OK | BancFirst |
| $1–2 million | CONTECH INC. | Broken Arrow, OK | BancFirst |
| $1–2 million | CONTECH, INC. | BROKEN ARROW, OK | BancFirst |
| $150,000–350,000 | CONTINENTAL BROEKRS AND CONSULTANTS INC | Oklahoma City, OK | BancFirst |
| $150,000–350,000 | CONTINENTAL BROKERS AND CONSULTANTS, INC. | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | CONTINENTAL WIRE CLOTH LLC | Jenks, OK | BancFirst |
| $350,000–1 million | CONTINENTAL WIRE CLOTH, LLC | JENKS, OK | BancFirst |
| $150,000–350,000 | COOP SERVICES INC | LAWTON, OK | BancFirst |
| $350,000–1 million | CORNER CONCEPTS LLC | Dallas, TX | BancFirst |
| $350,000–1 million | CORNER CONCEPTS, LLC | DALLAS, TX | BancFirst |
| $350,000–1 million | COSTLEY ENTERPRISES INC | Tulsa, OK | BancFirst |
| $350,000–1 million | COSTLEY ENTERPRISES INC | BROKEN ARROW, OK | BancFirst |
| $1–2 million | COUNSELING & RECOVERY SERVICES OF OKLAHOMA, INC | TULSA, OK | BancFirst |
| $150,000–350,000 | COUNTRY STYLE HEALTH CARE INC. VIII | Wilburton, OK | BancFirst |
| $1–2 million | COUNTRY STYLE HEALTH CARE, INC | EUFAULA, OK | BancFirst |
| $150,000–350,000 | COUNTRY STYLE HEALTH CARE, INC | KETCHUM, OK | BancFirst |
| $150,000–350,000 | COUNTRY STYLE HEALTH CARE, INC. VII | SMITHVILLE, OK | BancFirst |
| $150,000–350,000 | COUNTRY STYLE HEALTH CARE, INC. VIII | MCALESTER, OK | BancFirst |
| $150,000–350,000 | COUNTRY STYLE MANAGEMENT CORPORATION | WILBURTON, OK | BancFirst |
| $350,000–1 million | COURSEAU CONCEPTS | DALLAS, TX | BancFirst |
| $350,000–1 million | COURSEAU CONCEPTS LLC | Dallas, TX | BancFirst |
| $150,000–350,000 | COWAN, HUBBERT & FRANKLIN, PLLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | COYSCO, LC | NORMAN, OK | BancFirst |
| $150,000–350,000 | CRAFTSMEN RESOURCES LLC | Tulsa, OK | BancFirst |
| $150,000–350,000 | CRAFTSMEN RESOURCES LLC | TULSA, OK | BancFirst |
| $1–2 million | CRAWLEY PETROLEUM CORPORATION | Oklahoma City, OK | BancFirst |
| $350,000–1 million | CRAWLEY PETROLEUM CORPORATION | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | CRIMSON STEEL SUPPLY LLC | TULSA, OK | BancFirst |
| $350,000–1 million | CRISTO REY OKLAHOMA CITY CATHOLIC HIGH SCHOOL, INC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | CROSS TRANSPORTATION, LLC | PONCA CITY, OK | BancFirst |
| $2–5 million | CROSSINGS COMMUNITY CHURCH, INC | OKLAHOMA CITY, OK | BancFirst |
| $2–5 million | CROWE & DUNLEVY, A PROFEESIONAL CORPORATION | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | CULP ASSOCIATES, INC. | DALLAS, TX | BancFirst |
| $150,000–350,000 | CULTIVAR MEXICAN KITCHEN, LLC | EDMOND, OK | BancFirst |
| $150,000–350,000 | CULTURAL AWARENESS INTERNATIONAL INC. | Dallas, TX | BancFirst |
| $150,000–350,000 | CULTURAL AWARENESS INTERNATIONAL, INC | DALLAS, TX | BancFirst |
| $150,000–350,000 | CUSTOM COATINGS OF BROKEN ARRO | COWETA, OK | BancFirst |
| $150,000–350,000 | D & T CONSTRUCTION ENTERPRISES, INC. | HASKELL, OK | BancFirst |
| $350,000–1 million | D&D TRUCK SALES, INC. | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | D-KERNS CONSTRUCTION INC | Claremore, OK | BancFirst |
| $350,000–1 million | D-KERNS CONSTRUCTION, INC | CLAREMORE, OK | BancFirst |
| $150,000–350,000 | D. H. FRENCH CONSTRUCTION CO | Oklahoma City, OK | BancFirst |
| $150,000–350,000 | D. H. FRENCH CONSTRUCTION CO. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | DALE'S TANK SERVICE, INC. | RATLIFF CITY, OK | BancFirst |
| $350,000–1 million | DALEO, INC. | GILROY, CA | BancFirst |
| $350,000–1 million | DALLAS PRODUCTION, INC. | DALLAS, TX | BancFirst |
| $350,000–1 million | DALLAS THEATER CENTER | DALLAS, TX | BancFirst |
| $2–5 million | DATA MONITOR SYSTEMS, INC. | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | DAUGHERTY FOWLER PEREGRIN HAUGHT & JENSON A PROFESSIONAL COR | Oklahoma City, OK | BancFirst |
| $350,000–1 million | DAUGHERTY, FOWLER, PEREGRIN, HAUGHT & JENSON, A PROFESSIONAL | OKLAHOMA CITY, OK | BancFirst |
| $1–2 million | DAVENPORT ROUSTABOUT SERVICE, INC | CHANDLER, OK | BancFirst |
| $350,000–1 million | DAVES CLAREMORE RV & AUTO, INC | CLAREMORE, OK | BancFirst |
| $1–2 million | DAVID STANLEY CHEVROLET, INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | DAVIDSON & DAVIDSON ENTERPRISE LLC | Tulsa, OK | BancFirst |
| $150,000–350,000 | DAVIDSON & DAVIDSON ENTERPRISES LLC | TULSA, OK | BancFirst |
| $150,000–350,000 | DAVIS TRUCK SERVICE, INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | DC 2008 INC | BETHANY, OK | BancFirst |
| $2–5 million | DEAN MCGEE EYE INSTITUTE | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | DEAN STAFFING SERVICES, INC. | JONES, OK | BancFirst |
| $150,000–350,000 | DEEP WELL TUBULAR SERVICES, INC. | EDMOND, OK | BancFirst |
| $1–2 million | DEEPROCK MANAGEMENT LLC | Cushing, OK | BancFirst |
| $1–2 million | DEEPROCK MANAGEMENT LLC | CUSHING, OK | BancFirst |
| $5–10 million | DELAWARE RESOURCE GROUP OF OKLAHOMA, LLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | DELSON PROPERTIES, LTD | EL RENO, OK | BancFirst |
| $2–5 million | DEN MAR SERVICES, INC. | LAWTON, OK | BancFirst |
| $150,000–350,000 | DEREK R MASK DDS PLLC | Norman, OK | BancFirst |
| $150,000–350,000 | DEREK R MASK DDS PLLC | NORMAN, OK | BancFirst |
| $150,000–350,000 | DESPAIN INC | YUKON, OK | BancFirst |
| $2–5 million | DIAKONOS GROUP, LLC | EDMOND, OK | BancFirst |
| $350,000–1 million | DIFFEE FORD LINCOLN, INC | EL RENO, OK | BancFirst |
| $1–2 million | DIMONT ACQUISITION HOLDINGS, LLC | DALLAS, TX | BancFirst |
| $150,000–350,000 | DIVERSIFIED RUBBER PRODUCTS, INC. | TULSA, OK | BancFirst |
| $1–2 million | DIVISION SERVICES | EDMOND, OK | BancFirst |
| $150,000–350,000 | DODSON THOMPSON MANSFIELD PLLC | Oklahoma City, OK | BancFirst |
| $150,000–350,000 | DODSON-THOMPSON-MANSFIELD, PLLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | DON THORNTON CADILLAC, INC | TULSA, OK | BancFirst |
| $350,000–1 million | DON THORNTON IMPORTS, LLC | TULSA, OK | BancFirst |
| $150,000–350,000 | DONNELLY RESOURCES INC. | Oklahoma City, OK | BancFirst |