| $150,000–350,000 | JENNINGS TEAGUE PC | OKLAHOMA CITY, OK | First Liberty Bank |
| $150,000–350,000 | JESCO ELECTRIC INC | OKLAHOMA CITY, OK | Bank of America, National Association |
| $150,000–350,000 | JESSE LEWIS INC | OKLAHOMA CITY, OK | Bank of Western Oklahoma |
| $150,000–350,000 | JIM COOLEY CONSTRUCTION, L.L.C. | OKLAHOMA CITY, OK | First Liberty Bank |
| $350,000–1 million | JIMMY'S EGG, LLC | OKLAHOMA CITY, OK | SpiritBank |
| $350,000–1 million | JMA ENERGY COMPANY, LLC | OKLAHOMA CITY, OK | MidFirst Bank |
| $350,000–1 million | JOE COOPER FORD OF EDMOND, LLC | OKLAHOMA CITY, OK | International Bank of Commerce |
| $150,000–350,000 | JOE COOPER'S EASY CREDIT AUTO, LLC | OKLAHOMA CITY, OK | International Bank of Commerce |
| $150,000–350,000 | JOE S. CARSON, P.C. | OKLAHOMA CITY, OK | RCB Bank |
| $150,000–350,000 | JOHN R COLBERT | OKLAHOMA CITY, OK | First National Bank and Trust Company of Ardmore |
| $350,000–1 million | JOHN REX CHARTER ELEMENTARY SCHOOL | OKLAHOMA CITY, OK | BOKF, National Association |
| $350,000–1 million | JOHNSON & HANAN, P.C. | OKLAHOMA CITY, OK | Legacy Bank |
| $350,000–1 million | JOHNSON AND ASSOCIATES, INC. | OKLAHOMA CITY, OK | First Security Bank and Trust Company |
| $150,000–350,000 | JOHNSON POOLS INC | OKLAHOMA CITY, OK | Valliance Bank |
| $150,000–350,000 | JONES PUBLIC RELATIONS, INC. | OKLAHOMA CITY, OK | BOKF, National Association |
| $150,000–350,000 | JORDAN ASSOCIATES INC | OKLAHOMA CITY, OK | Arvest Bank |
| $350,000–1 million | JOURNEY HOUSE TRAVEL SERVICES INC. | OKLAHOMA CITY, OK | First National Bank of Oklahoma |
| $150,000–350,000 | JRC VENTURES INC | OKLAHOMA CITY, OK | First United Bank and Trust Company |
| $150,000–350,000 | JUAN A. BROU, M.D., P.C., INC. | OKLAHOMA CITY, OK | Simmons Bank |
| $150,000–350,000 | JUMP TECHNOLOGY SERVICES LLC | OKLAHOMA CITY, OK | Kirkpatrick Bank |
| $350,000–1 million | JUMP TRANSPORT, LLC | OKLAHOMA CITY, OK | First United Bank and Trust Company |
| $150,000–350,000 | JUST 4 A CHILD, INC. | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | K & R BUILDERS, INC. | OKLAHOMA CITY, OK | Regent Bank |
| $150,000–350,000 | K L BRADLEY ELECTRIC INC | OKLAHOMA CITY, OK | The Citizens Bank of Edmond |
| $150,000–350,000 | K&E FABRICATION LLC | OKLAHOMA CITY, OK | Valliance Bank |
| $350,000–1 million | K&M DIRT SERVICES, LLC | OKLAHOMA CITY, OK | RCB Bank |
| $150,000–350,000 | K.B. SAND, INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | K.M. DOEHRING | OKLAHOMA CITY, OK | First Fidelity Bank |
| $150,000–350,000 | KAMS INC. | OKLAHOMA CITY, OK | Arvest Bank |
| $150,000–350,000 | KANSAS LODGING I | OKLAHOMA CITY, OK | InterBank |
| $350,000–1 million | KAT INDUSTRIES, INC. | OKLAHOMA CITY, OK | MidFirst Bank |
| $150,000–350,000 | KAVANA ENTERPRISES, INC. | OKLAHOMA CITY, OK | Triad Bank |
| $150,000–350,000 | KAVON, LLC | OKLAHOMA CITY, OK | First Fidelity Bank |
| $150,000–350,000 | KE EH BROTHERS INC | OKLAHOMA CITY, OK | MidFirst 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 |
| $350,000–1 million | KIDNEY SPECIALISTS OF CENTRAL OKLAHOMA, PC | OKLAHOMA CITY, OK | MidFirst Bank |
| $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 |
| $350,000–1 million | KIRKPATRICK OIL COMPANY, INC. | OKLAHOMA CITY, OK | MidFirst 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 | LAMUN MOCK CUNNYNGHAM & DAVIS, P.C. | OKLAHOMA CITY, OK | MidFirst 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 |
| $350,000–1 million | LAND INFORMATION SERVICES LLC | OKLAHOMA CITY, OK | MidFirst Bank |
| $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, LLC | OKLAHOMA CITY, OK | Bank Leumi USA |
| $350,000–1 million | LANDMARK OF MIDWEST CITY REHABILITATION AND NURSING CENTER, LLC | OKLAHOMA CITY, OK | Bank Leumi USA |
| $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 |
| $150,000–350,000 | LATCHKEY CHILD SERVICES, INC. | OKLAHOMA CITY, OK | MidFirst Bank |
| $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 | LAWRENCE ENTERPRISES INC. | OKLAHOMA CITY, OK | First-Citizens Bank & Trust Company |
| $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 | LD ENTERTAINMENT COMPANY LLC | OKLAHOMA CITY, OK | MidFirst 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 |
| $150,000–350,000 | LETTERING EXPRESS OK INC. | OKLAHOMA CITY, OK | BancFirst |
| $150,000–350,000 | LEVY STRANGE BEFFORT LLC | OKLAHOMA CITY, OK | BancFirst |
| $350,000–1 million | LEWIS CAMPER MFG. & SALES, INC. | OKLAHOMA CITY, OK | MidFirst Bank |
| $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 |
| $350,000–1 million | LIBERTY DISPOSAL, INC. | OKLAHOMA CITY, OK | Live Oak Banking Company |
| $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 | Central Bank of Oklahoma |
| $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 |