| $350,000–1 million | INTERNATIONAL CUSTOM CONTROLS, LLC | TULSA, OK | Grand Bank |
| $350,000–1 million | INTERNATIONAL DENTAL ARTS, INC. | TULSA, OK | Security Bank |
| $350,000–1 million | INTERNATIONAL INSURANCE BROKERS, LTD. | TULSA, OK | Bank 7 |
| $350,000–1 million | INTERSTATE STEEL & METALS, INC | TULSA, OK | BOKF, National Association |
| $2–5 million | IPACESETTERS LLC | TULSA, OK | Radius Bank |
| $350,000–1 million | IRON CROSS AUTOMOTIVE, INC | TULSA, OK | Regent Bank |
| $150,000–350,000 | IRON GATE INC | TULSA, OK | Grand Bank |
| $150,000–350,000 | ISI ACQUISITION LLC | TULSA, OK | Central Bank of Oklahoma |
| $150,000–350,000 | ISRAEL DIAMOND SUPPLY LLC | TULSA, OK | BancFirst |
| $2–5 million | J&D ACQUISITIONS, INC. | TULSA, OK | MidFirst Bank |
| $150,000–350,000 | J.D. HAIR & ASSOCIATES, INC | TULSA, OK | Mabrey Bank |
| $1–2 million | J.D. YOUNG COMPANY INC | TULSA, OK | Prosperity Bank |
| $2–5 million | JACKIE COOPER IMPORTS OF TULSA, LLC | TULSA, OK | International Bank of Commerce |
| $150,000–350,000 | JACKSON TECHNICAL L.L.C. | TULSA, OK | RCB Bank |
| $350,000–1 million | JACOBI, LLC | TULSA, OK | American Heritage Bank |
| $150,000–350,000 | JAMES & MILLER WELDING, LLC | TULSA, OK | American Heritage Bank |
| $150,000–350,000 | JAMES F. OWENS DDS MS INC | TULSA, OK | Central Bank of Oklahoma |
| $150,000–350,000 | JAMES R HIGGINS MD INC | TULSA, OK | BOKF, National Association |
| $150,000–350,000 | JARRT HOLDINGS, INC. | TULSA, OK | Vast Bank, National Association |
| $150,000–350,000 | JARVIS INC. | TULSA, OK | Arvest Bank |
| $150,000–350,000 | JASON'S DELI | TULSA, OK | BancFirst |
| $150,000–350,000 | JAY WILLIAMSON D.O. PC | TULSA, OK | Mabrey Bank |
| $150,000–350,000 | JEANMARIE CREATIONS LLC | TULSA, OK | BOKF, National Association |
| $150,000–350,000 | JEFF ALEXANDER MD PC | TULSA, OK | First Oklahoma Bank |
| $350,000–1 million | JENSEN MIXERS INTERNATIONAL, INC | TULSA, OK | Arvest Bank |
| $150,000–350,000 | JERO MANUFACTURING, INC. | TULSA, OK | Central Bank of Oklahoma |
| $150,000–350,000 | JEWISH FEDERATION OF TULSA | TULSA, OK | BOKF, National Association |
| $150,000–350,000 | JJWT, LLC | TULSA, OK | Regent Bank |
| $150,000–350,000 | JO ROSE FINE CABINETS, INC. | TULSA, OK | Commerce Bank |
| $350,000–1 million | JOBING CONFIDENTIAL | TULSA, OK | BOKF, National Association |
| $150,000–350,000 | JOE'S BARBECUE 2 SOUTH TULSA LLC | TULSA, OK | Mabrey Bank |
| $350,000–1 million | JOHN 3:16 MISSION | TULSA, OK | Prosperity Bank |
| $350,000–1 million | JOHNSON & JONES, P.C. | TULSA, OK | Blue Sky Bank |
| $150,000–350,000 | JONES, GOTCHER & BOGAN, P.C. | TULSA, OK | Green Country FCU |
| $350,000–1 million | JONESPLAN, INC. | TULSA, OK | Arvest Bank |
| $150,000–350,000 | JOSHI TECHNOLOGIES INTERNATIONAL, INC. | TULSA, OK | Equity Bank |
| $150,000–350,000 | JOYEAUX INC | TULSA, OK | Central Bank of Oklahoma |
| $150,000–350,000 | JP CONSTRUCTION INC | TULSA, OK | Mabrey Bank |
| $150,000–350,000 | JP CRAFTERS, INC. | TULSA, OK | First National Bank & Trust Company of McAlester |
| $150,000–350,000 | JSO INC | TULSA, OK | Arvest Bank |
| $150,000–350,000 | JUNIOR ACHIEVEMENT OF OKLAHOMA INC | TULSA, OK | Arvest Bank |
| $350,000–1 million | JUSTIN THOMPSON CONSULTING LLC | TULSA, OK | Triad Bank, National Association |
| $350,000–1 million | K&M SHILLINGFORD INC | TULSA, OK | Prosperity Bank |
| $150,000–350,000 | K-T ENTERPRISES, INC. | TULSA, OK | Regent Bank |
| $150,000–350,000 | KAHAN & ASSOCIATES, INC | TULSA, OK | Triad Bank, National Association |
| $350,000–1 million | KAIROS CARE, INC | TULSA, OK | BOKF, National Association |
| $150,000–350,000 | KAROLL MARTIN PAINT & BODY SHO | TULSA, OK | Security Bank |
| $150,000–350,000 | KEITH & ASSOCIATES INC | TULSA, OK | MidFirst Bank |
| $350,000–1 million | KELLER VENTURES INC. | TULSA, OK | BOKF, National Association |
| $1–2 million | KENCO INTERNATIONAL INC | TULSA, OK | First Oklahoma Bank |
| $2–5 million | KFM ENTERPRISES, LLC | TULSA, OK | Mabrey Bank |
| $150,000–350,000 | KHEZRI BROTHERS, INC. | TULSA, OK | BancFirst |
| $350,000–1 million | KIPP TULSA ACADEMY COLLEGE PREP INC. | TULSA, OK | BOKF, National Association |
| $350,000–1 million | KIRK OF THE HILLS CORPORATION | TULSA, OK | Arvest Bank |
| $150,000–350,000 | KIRKPATRICK & LAI DDS, INC, PC | TULSA, OK | Yorktown Bank |
| $350,000–1 million | KIVELL, RAYMENT AND FRANCIS, P. C. | TULSA, OK | Triad Bank, National Association |
| $1–2 million | KKT ARCHITECTS, INC | TULSA, OK | Vast Bank, National Association |
| $150,000–350,000 | KRUSE & ASSOCIATES, INC., KRUSE STAFFING, INC & KRUSE INTERNATIONAL, INC | TULSA, OK | Security Bank |
| $350,000–1 million | KSQ ARCHITECTS, PC | TULSA, OK | Vast Bank, National Association |
| $1–2 million | KSW OILFIELD RENTAL, LLC | TULSA, OK | Gulf Capital Bank |
| $1–2 million | KTAK CORPORATION I | TULSA, OK | American Bank and Trust Company |
| $150,000–350,000 | L A KING, LLC | TULSA, OK | BancFirst |
| $350,000–1 million | L&M OFFICE FURNITURE, LLC | TULSA, OK | SpiritBank |
| $350,000–1 million | L.E.F., INC. DBA LASER ENGINEERING & FABRICATING | TULSA, OK | Security Bank |
| $150,000–350,000 | LA BELLA VITA SPA AND SALON, LLC | TULSA, OK | Regent Bank |
| $150,000–350,000 | LA UNION 7 LLC | TULSA, OK | BancFirst |
| $150,000–350,000 | LA UNION 8 LLC | TULSA, OK | BancFirst |
| $150,000–350,000 | LA UNION DOS, INC | TULSA, OK | BancFirst |
| $150,000–350,000 | LABORATORY LOGISTIC SERVICES LLC | TULSA, OK | Regent Bank |
| $350,000–1 million | LAMB MANAGEMENT COMPANY, LLC | TULSA, OK | BancFirst |
| $350,000–1 million | LAND ROVER TULSA, LLC | TULSA, OK | BancFirst |
| $150,000–350,000 | LANDES INSURANCE AGENCY, INC. | TULSA, OK | RCB Bank |
| $150,000–350,000 | LANGDON PUBLISHING CO INC. | TULSA, OK | First Oklahoma Bank |
| $150,000–350,000 | LANNA INC. | TULSA, OK | The Exchange Bank |
| $350,000–1 million | LARRY BREWER DENTAL LAB INC. | TULSA, OK | BancFirst |
| $150,000–350,000 | LARRY C KESTER DBA ARCHITECTS COLLECTIVE | TULSA, OK | Grand Bank |
| $150,000–350,000 | LAS AMERICAS SUPERMERCADO #2, INC | TULSA, OK | Security Bank |
| $150,000–350,000 | LAS AMERICAS SUPERMERCADO #4, INC. | TULSA, OK | Security Bank |
| $150,000–350,000 | LAS AMERICAS SUPERRMERCADO #3, INC. | TULSA, OK | Security Bank |
| $350,000–1 million | LASER SPECIALTIES, INC. | TULSA, OK | SpiritBank |
| $350,000–1 million | LATHAM, STEELE, LEHMAN, KEELE, RATCLIFF, FREIJE & CARTER, PC | TULSA, OK | Firstar Bank |
| $5–10 million | LATSHAW DRILLING COMPANY, LLC | TULSA, OK | Simmons Bank |
| $350,000–1 million | LAYCO, INC. | TULSA, OK | Regent Bank |
| $150,000–350,000 | LAYSON ENTERPRISES, INC. | TULSA, OK | Grand Bank |
| $150,000–350,000 | LEE & BROWNE CONSULTING ENGINEERS INC | TULSA, OK | Arvest Bank |
| $350,000–1 million | LEE HOLDING COMPANY, LLC | TULSA, OK | Commerce Bank |
| $1–2 million | LEINBACH COMPANY MANAGEMENT | TULSA, OK | BOKF, National Association |
| $350,000–1 million | LEISURE VILLAGE HEALTH CARE, LLC | TULSA, OK | BOKF, National Association |
| $350,000–1 million | LEKTRON LED TECHNOLOGIES, LLC | TULSA, OK | The First National Bank and Trust Company of Broken Arrow |
| $150,000–350,000 | LEVINSON SULLIVAN DENTISTRY, PLLC | TULSA, OK | Mabrey Bank |
| $350,000–1 million | LEVINSON, SMITH & HUFFMAN, P.C. | TULSA, OK | Bank 7 |
| $150,000–350,000 | LEWIS ROOFING& CONSTRUCTION LLC | TULSA, OK | Arvest Bank |
| $1–2 million | LEXUS OF TULSA | TULSA, OK | BancFirst |
| $150,000–350,000 | LIESURE HOSPITALITY MANAGEMENT, INC. | TULSA, OK | First Bank of Owasso |
| $350,000–1 million | LIFE PACE, INC | TULSA, OK | BancFirst |
| $350,000–1 million | LIFE SENIOR SERVICES, INC | TULSA, OK | BancFirst |
| $1–2 million | LIGHTHOUSE ELECTRIC LLC | TULSA, OK | BancFirst |
| $1–2 million | LIMCO AIREPAIR INC | TULSA, OK | Bank Leumi USA |
| $350,000–1 million | LITTLE LIGHTHOUSE INC | TULSA, OK | Regent Bank |
| $150,000–350,000 | LITTLE MOUNTAIN PRODUCTION INC | TULSA, OK | First Oklahoma Bank |