| $350,000–1 million | ME3 OILFIELD SERVICE, LLC | TULSA, OK | BancFirst |
| $150,000–350,000 | MEDALLION RESOURCES, LLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | MEDICAL SPECIALISTS ASSOCIATED | Dallas, TX | BancFirst |
| $350,000–1 million | MEDICAL SPECIALISTS ASSOCIATED | DALLAS, TX | BancFirst |
| $150,000–350,000 | MEK CORPORATION | TULSA, OK | BancFirst |
| $350,000–1 million | MELTON SALES, INC | CLAREMORE, OK | BancFirst |
| $350,000–1 million | MEMORIAL ROAD CHURCH OF CHRIST | EDMOND, OK | BancFirst |
| $150,000–350,000 | MERCY SCHOOL INSTITUTE | EDMOND, OK | BancFirst |
| $150,000–350,000 | MERITT AVIATION, INC | YUKON, OK | BancFirst |
| $150,000–350,000 | METAL FORMING SOLUTIONS, LLC | TULSA, OK | BancFirst |
| $150,000–350,000 | METRO CARTAGE LLC | Moore, OK | BancFirst |
| $350,000–1 million | METRO-TECH ELECTRICAL CONTRACT | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | METROPAK INC | RICHARDSON, TX | BancFirst |
| $150,000–350,000 | MEXICAN RADIO LLC | Oklahoma City, OK | BancFirst |
| $150,000–350,000 | MEXICAN RADIO, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | MEYER BROTHERS LLC | NORMAN, OK | BancFirst |
| $350,000–1 million | MICHAEL G MCCAULEY MD INC | ARDMORE, OK | BancFirst |
| $150,000–350,000 | MICHAEL'S GRILL, INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | MICHAELS GRILL INC | Oklahoma City, OK | BancFirst |
| $150,000–350,000 | MID-AMERICAN SPARKS, LLC | CLAREMORE, OK | BancFirst |
| $1–2 million | MID-CON ENERGY OPERATING, LLC | TULSA, OK | BancFirst |
| $350,000–1 million | MID-CONTINENT GROUP, LLC | OKLAHOMA CITY, OK | BancFirst |
| $2–5 million | MID-WEST HOSE & SPECIALTY INC. | Oklahoma City, OK | BancFirst |
| $2–5 million | MID-WEST HOSE & SPECIALTY, INC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | MIDWEST COMMERCIAL, LLC | EARLSBORO, OK | BancFirst |
| $350,000–1 million | MIDWEST RACQUETBALL AND SPORTING GOODS DISTRIBUTION, INC. | TULSA, OK | BancFirst |
| $350,000–1 million | MIDWEST RAQUETBALL AND SPORTING GOODS DIST. INC. | Tulsa, OK | BancFirst |
| $350,000–1 million | MIDWEST WRECKING CO LLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | MIDWEST WRECKING CO LLC | Oklahoma City, OK | BancFirst |
| $350,000–1 million | MILLER EXCAVATION, INC. | UNION CITY, OK | BancFirst |
| $350,000–1 million | MILLS WELL SERVICE INC | Seminole, OK | BancFirst |
| $350,000–1 million | MILLS WELL SERVICE, INC. | SEMINOLE, OK | BancFirst |
| $1–2 million | MINGO MANUFACTURING INC. | OWASSO, OK | BancFirst |
| $1–2 million | MINGO MANUFACTURING INC. | Owasso, OK | BancFirst |
| $150,000–350,000 | MINGO VALLEY CHRISTIAN SCHOOL, INC | TULSA, OK | BancFirst |
| $350,000–1 million | MISTER SWEEPER LP | DALLAS, TX | BancFirst |
| $350,000–1 million | MOCKINGBIRD PARTNERS LP | Dallas, TX | BancFirst |
| $350,000–1 million | MOCKINGBIRD PARTNERS, LP | DALLAS, TX | BancFirst |
| $1–2 million | MODULAR SERVICES COMPANY | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | MOLDED PRODUCTS INC. | Broken Arrow, OK | BancFirst |
| $350,000–1 million | MOLDED PRODUCTS, INCORPORATED | BROKEN ARROW, OK | BancFirst |
| $350,000–1 million | MOLLMAN WATER CONDITIONING, INC. | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | MOORE FUNERAL HOME, INC | TULSA, OK | BancFirst |
| $350,000–1 million | MOORE IRON & STEEL CORP | Yale, OK | BancFirst |
| $350,000–1 million | MOORE IRON & STEEL CORP. | YALE, OK | BancFirst |
| $150,000–350,000 | MOORE YOUTH & FAMILY SERVICES, INC. | Moore, OK | BancFirst |
| $350,000–1 million | MOUNT SAINT MARY HIGHSCHOOL | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | MSI INSPECTION SERVICE LLC | EDMOND, OK | BancFirst |
| $150,000–350,000 | MSI INSPECTION SERVICE LLC | Edmond, OK | BancFirst |
| $150,000–350,000 | MURET CPA, PLLC | TULSA, OK | BancFirst |
| $150,000–350,000 | MURRPHY PRODUCTS, INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | MUSKOGEE BONE & JOINT CLINIC PLLC | Muskogee, OK | BancFirst |
| $150,000–350,000 | MUSKOGEE BONE AND JOINT CLINIC | MUSKOGEE, OK | BancFirst |
| $150,000–350,000 | MUSKOGEE HEALTH SERVICES, L.L.C. | MUSKOGEE, OK | BancFirst |
| $350,000–1 million | MUSTANG SWD OPERATING, LLC | DALLAS, TX | BancFirst |
| $150,000–350,000 | MY SMALL WONDERS, INC. | EDMOND, OK | BancFirst |
| $350,000–1 million | MYRIAD GARDENS FOUNDATION INC. | Oklahoma City, OK | BancFirst |
| $350,000–1 million | MYRIAD GARDENS FOUNDATION, INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | MZ ENTERPRISE | OWASSO, OK | BancFirst |
| $150,000–350,000 | N & S ASSOCIATES, LLC | TISHOMINGO, OK | BancFirst |
| $1–2 million | N-VEST, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | NABATAK, INC | CLAREMORE, OK | BancFirst |
| $350,000–1 million | NATIONAL COWBOY & WESTERN HERITAGE MUSEUM | Oklahoma City, OK | BancFirst |
| $350,000–1 million | NATIONAL COWBOY & WESTERN HERITAGE MUSEUM, INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | NATIONAL LOAN INVESTORS L.P. | Oklahoma City, OK | BancFirst |
| $150,000–350,000 | NATIONAL LOAN INVESTORS LP | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | NATIVE AMERICAN MAINTENANCE SERVICES INC. | Muskogee, OK | BancFirst |
| $150,000–350,000 | NATIVE AMERICAN MAINTENANCE SERVICES, INC | MUSKOGEE, OK | BancFirst |
| $150,000–350,000 | NATIVE DISTRIBUTING LLC | Norman, OK | BancFirst |
| $150,000–350,000 | NATIVE DISTRIBUTING LLC | NORMAN, OK | BancFirst |
| $150,000–350,000 | NBO SHOES CHICAGO LLC | Saint Louis, MO | BancFirst |
| $150,000–350,000 | NBO SHOES CHICAGO, LLC | SAINT LOUIS, MO | BancFirst |
| $350,000–1 million | NBO SHOES LLC | Saint Louis, MO | BancFirst |
| $350,000–1 million | NBO SHOES, LLC | SAINT LOUIS, MO | BancFirst |
| $350,000–1 million | NEIGHBORHOOD JAM- TULSA L.L.C. | Tulsa, OK | BancFirst |
| $150,000–350,000 | NEIGHBORHOOD JAM-TULSA, LLC | TULSA, OK | BancFirst |
| $150,000–350,000 | NEURODIAGNOSTIC CONSULTANTS, L.L.C. | AUSTIN, TX | BancFirst |
| $1–2 million | NEWTON WALL COMPANY, INC. | SHAWNEE, OK | BancFirst |
| $350,000–1 million | NEXTTHOUGHT LLC | Norman, OK | BancFirst |
| $350,000–1 million | NEXTTHOUGHT, LLC | NORMAN, OK | BancFirst |
| $150,000–350,000 | NICHOLS HILLS UNITED METHODIST CHURCH INC | NICHOLS HILLS, OK | BancFirst |
| $150,000–350,000 | NICHOLS HILLS UNITED METHODIST CHURCH INC. | Nichols Hills, OK | BancFirst |
| $150,000–350,000 | NICKSON, INC. | DALLAS, TX | BancFirst |
| $150,000–350,000 | NORRIS & WEBER PLLC | Dallas, TX | BancFirst |
| $150,000–350,000 | NORTH CENTRAL CONSTRUCTION CO. | Stillwater, OK | BancFirst |
| $150,000–350,000 | NORTH CENTRAL CONSTRUCTION COM | STILLWATER, OK | BancFirst |
| $150,000–350,000 | NORTH CENTRAL OKLAHOMA EMERGENCY SERVICES INC | BLACKWELL, OK | BancFirst |
| $150,000–350,000 | NORTHERN HOSPITALITY LLC | Edmond, OK | BancFirst |
| $350,000–1 million | NOSAJ INC. | Tulsa, OK | BancFirst |
| $150,000–350,000 | NUVOLE SV CORP | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | O7 ENERGY CO LLC | MARIETTA, OK | BancFirst |
| $150,000–350,000 | OCEAN DENTAL CORPORATE OFFICE INC. | Edmond, OK | BancFirst |
| $150,000–350,000 | OCEAN DENTAL CORPORATE OFFICE, INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | OCEAN DENTAL OF ARKANSAS PC | Edmond, OK | BancFirst |
| $150,000–350,000 | OCEAN DENTAL OF ARKANSAS, PC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | OCEAN DENTAL OF IOWA PC | Edmond, OK | BancFirst |
| $150,000–350,000 | OCEAN DENTAL OF IOWA, PC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | OCEAN DENTAL OF TEXAS PC | Edmond, OK | BancFirst |
| $150,000–350,000 | OCEAN DENTAL OF TEXAS, PC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | OCEAN DENTAL PC | Edmond, OK | BancFirst |