| $150,000–350,000 | KAMS INC. | OKLAHOMA CITY, OK | Arvest Bank |
| $150,000–350,000 | KANSAS LODGING I | OKLAHOMA CITY, OK | InterBank |
| $150,000–350,000 | KAVANA ENTERPRISES, INC. | OKLAHOMA CITY, OK | Triad Bank |
| $350,000–1 million | KELLY MEDICAL, P.C. | OKLAHOMA CITY, OK | First Liberty Bank |
| $350,000–1 million | KEMPTON GROUP HOLDINGS INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | KETNER ENTERPRISES OF OKLAHOMA CITY, INC | OKLAHOMA CITY, OK | First United Bank and Trust Company |
| $150,000–350,000 | KEVIN G. CLOSE LLC | OKLAHOMA CITY, OK | RCB Bank |
| $150,000–350,000 | KEVIN W BURNETT & ASSOCIATES, PLLC | OKLAHOMA CITY, OK | MidFirst Bank |
| $150,000–350,000 | KEVO PROPERTY MANAGEMENT, LLC | OKLAHOMA CITY, OK | Kirkpatrick Bank |
| $1–2 million | KEYBRIDGE TECHNOLOGIES, INC. | OKLAHOMA CITY, OK | Armstrong Bank |
| $350,000–1 million | KEYSTAFF, LLC | OKLAHOMA CITY, OK | First United Bank and Trust Company |
| $150,000–350,000 | KINGSINGTON GROUP INC | OKLAHOMA CITY, OK | Arvest Bank |
| $350,000–1 million | KIPP OKC COLLEGE PREP | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | KIRK & CHANEY PLLC | OKLAHOMA CITY, OK | BOKF, National Association |
| $350,000–1 million | KIRKPATRICK FOREST CURTIS PC | OKLAHOMA CITY, OK | F & M Bank |
| $150,000–350,000 | KLINGENBERG & ASSOCIATES PC | OKLAHOMA CITY, OK | BOKF, National Association |
| $350,000–1 million | KOCH COMMUNICATIONS LLC | OKLAHOMA CITY, OK | Mabrey Bank |
| $150,000–350,000 | KOMEX LTD | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | KRAPFF-REYNOLDS CONSTRUCTION COMPANY | OKLAHOMA CITY, OK | First Fidelity Bank |
| $350,000–1 million | KUDRON READY MIX, INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | KYBENCO DISPOSALS, LLC | OKLAHOMA CITY, OK | Liberty National Bank |
| $350,000–1 million | L AND J ACQUISITIONS, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | L R TOBY TRUCKING INC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | LA UNION 4 LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | LA UNION 5 LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | LAMPSTAND MEDIA, LLC | OKLAHOMA CITY, OK | Watermark Bank |
| $150,000–350,000 | LANCE R SCHMIDT, DDS, PC | OKLAHOMA CITY, OK | First Liberty Bank |
| $350,000–1 million | LANCE RUFFEL OIL & GAS, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | LANDMARK CONSTRUCTION GROUP LLC | OKLAHOMA CITY, OK | Arvest Bank |
| $150,000–350,000 | LANDMARK CONSTRUCTION GROUP, INC. | OKLAHOMA CITY, OK | First Fidelity Bank |
| $350,000–1 million | LANDMARK OF MIDWEST CITY REHABILITATION AND NURSING CENTER, | OKLAHOMA CITY, OK | Valley National Bank |
| $350,000–1 million | LANDMARK OF MIDWEST CITY REHABILITATION AND NURSING CENTER, | OKLAHOMA CITY, OK | Valley National Bank |
| $150,000–350,000 | LANG ENTERPRISES OF OKLAHOMA, INC. | OKLAHOMA CITY, OK | RCB Bank |
| $350,000–1 million | LANGSTON CO | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | LAS TRANCAS INC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | LAST FRONTIER COUNCIL INC. BOY SCOUTS OF AMERICA | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | LATINO COMMUNITY DEVELOPMENT AGENCY INC. | OKLAHOMA CITY, OK | Simmons Bank |
| $350,000–1 million | LAURA LYNN'S HOME CARE LLC | OKLAHOMA CITY, OK | Valliance Bank |
| $150,000–350,000 | LAW OFFICES OF DANIEL DAVIS, P.C. | OKLAHOMA CITY, OK | BOKF, National Association |
| $150,000–350,000 | LAWTER & ASSOCIATES, PLLC | OKLAHOMA CITY, OK | Simmons Bank |
| $350,000–1 million | LBR SMITH, LLC | OKLAHOMA CITY, OK | Frazer Bank |
| $350,000–1 million | LE NORMAN PROPERTIES, LLC | OKLAHOMA CITY, OK | International Bank of Commerce |
| $2–5 million | LEADER COMMUNICATIONS INC | OKLAHOMA CITY, OK | FNB Community Bank |
| $2–5 million | LEGAL AID SERVICES OF OKLAHOMA, INC. | OKLAHOMA CITY, OK | BOKF, National Association |
| $5–10 million | LEGEND ENERGY SERVICES, LLC | OKLAHOMA CITY, OK | NBC Oklahoma |
| $150,000–350,000 | LEONARD BUILDING COMPANY, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | LETS EAT LLC | OKLAHOMA CITY, OK | IberiaBank, A Division of First Horizon Bank |
| $150,000–350,000 | LETTERING EXPRESS OK INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | LEVY STRANGE BEFFORT LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | LEWIS JEWELERS, INC. | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | LEWIS MANUFACTURING COMPANY LLC | OKLAHOMA CITY, OK | FNB Community Bank |
| $150,000–350,000 | LIFELINE IRS SOLUTIONS, LLC | OKLAHOMA CITY, OK | RCB Bank |
| $2–5 million | LIFESHARE TRANSPLANT DONOR SERVICES OF OKLAHOMA, INC. | OKLAHOMA CITY, OK | The Central Trust Bank |
| $150,000–350,000 | LINDEN & ASSOCIATES, PC | OKLAHOMA CITY, OK | Kirkpatrick Bank |
| $1–2 million | LINGO CONSTRUCTIN SERVICES, INC. | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | LIPPE FEDERAL LLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | LIPPERT BROS, INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | LITTLE GENERAL LLC | OKLAHOMA CITY, OK | First Fidelity Bank |
| $150,000–350,000 | LONG TERM CARE SPECIALISTS, INC. | OKLAHOMA CITY, OK | First United Bank and Trust Company |
| $150,000–350,000 | LONG WAVE SERVICES, INC. | OKLAHOMA CITY, OK | BancFirst |
| $1–2 million | LONG WAVE, INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | LORRAINE T. WILSON, M.D., PC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | LOUIE'S ON THE LAKE, LLC | OKLAHOMA CITY, OK | BancFirst |
| $1–2 million | LOUIS V LEPAK TRUCKING CO INC | OKLAHOMA CITY, OK | Prosperity Bank |
| $350,000–1 million | LOVE, BEAL, & NIXON, PC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | LOVING CARE MANAGEMENT, INC. | OKLAHOMA CITY, OK | InterBank |
| $350,000–1 million | LOWRY LAND CO | OKLAHOMA CITY, OK | BOKF, National Association |
| $5–10 million | LSB INDUSTRIES, INC | OKLAHOMA CITY, OK | BOKF, National Association |
| $350,000–1 million | LTR FASTENER AND SUPPLY, LLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | LUCAS HOLDINGS, LLC | OKLAHOMA CITY, OK | Wintrust Bank, National Association |
| $150,000–350,000 | LUSH FASHION LOUNGE, LLC | OKLAHOMA CITY, OK | F & M Bank |
| $150,000–350,000 | LUTON & CO PLLC | OKLAHOMA CITY, OK | Kirkpatrick Bank |
| $150,000–350,000 | LV, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | LYRIC THEATRE OF OKLAHOMA, INC | OKLAHOMA CITY, OK | BOKF, National Association |
| $150,000–350,000 | LYTLE, SOULE & FELTY, P.C. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | M & M INSULATION, INC | OKLAHOMA CITY, OK | Frontier State Bank |
| $1–2 million | M&N DEALERSHIPS XII, LLC | OKLAHOMA CITY, OK | International Bank of Commerce |
| $350,000–1 million | M&S HEALTHCARE MANAGEMENT LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | M5, INCORPORATED | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | MA+ ARCHITECTURE | OKLAHOMA CITY, OK | Armstrong Bank |
| $350,000–1 million | MACARTHUR ASSOCIATES CONSULTANTS, LLC | OKLAHOMA CITY, OK | First-Citizens Bank & Trust Company |
| $2–5 million | MACH RESOURCES LLC | OKLAHOMA CITY, OK | MidFirst Bank |
| $350,000–1 million | MACKELLAR, INC. | OKLAHOMA CITY, OK | BOKF, National Association |
| $150,000–350,000 | MADCO CORP | OKLAHOMA CITY, OK | RCB Bank |
| $350,000–1 million | MAGIC SERVICES, INC | OKLAHOMA CITY, OK | RCB Bank |
| $2–5 million | MAGNUM FOODS, INC. | OKLAHOMA CITY, OK | BOKF, National Association |
| $350,000–1 million | MAHAFFEY & GORE, PC | OKLAHOMA CITY, OK | International Bank of Commerce |
| $350,000–1 million | MAHOGANY- DOWNTOWN OKC, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | MAHOGANY-OKC, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | MAKE-A-WISH FOUNDATION OF OKLAHOMA, INC. | OKLAHOMA CITY, OK | Legacy Bank |
| $350,000–1 million | MAMA ROJA, LLC | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | MANSELL & ENGEL, P.C. | OKLAHOMA CITY, OK | Regent Bank |
| $350,000–1 million | MARIANNE'S RENTALS FOR SPECIAL EVENTS | OKLAHOMA CITY, OK | Kirkpatrick Bank |
| $150,000–350,000 | MARIPOSA MEDSPA, LLC | OKLAHOMA CITY, OK | INTRUST Bank, National Association |
| $150,000–350,000 | MARK A DAWKINS MD PC | OKLAHOMA CITY, OK | BOKF, National Association |
| $350,000–1 million | MARK BURSON, GENERAL AGENT | OKLAHOMA CITY, OK | First Fidelity Bank |
| $150,000–350,000 | MARTIN BIONICS INNOVATIONS, LLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | MARTINDALE CONSULTANTS INC. | OKLAHOMA CITY, OK | Sovereign Bank |
| $150,000–350,000 | MASS ARCHITECTS,INC | OKLAHOMA CITY, OK | First National Bank of Oklahoma |
| $350,000–1 million | MATHIS MANAGEMENT INC | OKLAHOMA CITY, OK | BOKF, National Association |