| $150,000–350,000 | SAMURAI EQUIPMENT, LLC | TULSA, OK | Bank of America, National Association |
| $350,000–1 million | SANFORD BROTHERS CO., INC. & SUBSIDIARIES | TULSA, OK | Firstar Bank |
| $350,000–1 million | SANGUINE GAS EXPLORATION, LLC | TULSA, OK | BOKF, National Association |
| $150,000–350,000 | SAPPHIRE WINDOW CLEANING | TULSA, OK | WeStreet FCU |
| $350,000–1 million | SASHAY CORPORATE SERVICES, LLC | TULSA, OK | American Bank and Trust Company |
| $150,000–350,000 | SAVASTANO'S PIZZERIA AND RESTAURANT INC. | TULSA, OK | Mabrey Bank |
| $150,000–350,000 | SAVOY RESTAURANT INC | TULSA, OK | Triad Bank, National Association |
| $350,000–1 million | SAWYER MANUFACTURING COMPANY | TULSA, OK | Security Bank |
| $150,000–350,000 | SBA HOLDINGS, INC. | TULSA, OK | First Oklahoma Bank |
| $150,000–350,000 | SBPJ, INC. | TULSA, OK | SpiritBank |
| $150,000–350,000 | SCELERIN HEATERS, LLC | TULSA, OK | RCB Bank |
| $150,000–350,000 | SCFM SERVICES, INC | TULSA, OK | Regent Bank |
| $350,000–1 million | SCHAFFER HERRING, PLLC | TULSA, OK | Security Bank |
| $150,000–350,000 | SCHNAKE TURNBO FRANK INC | TULSA, OK | Arvest Bank |
| $350,000–1 million | SCHOENHOFER ENTERPRISES, LLC | TULSA, OK | INTRUST Bank, National Association |
| $150,000–350,000 | SCISSORTAIL HEALTHCARE, LLC | TULSA, OK | First Oklahoma Bank |
| $150,000–350,000 | SCOTT ROBINSON CONSTRUCTION INC. | TULSA, OK | BOKF, National Association |
| $350,000–1 million | SEAL COMPANY ENTERPRISES, INC | TULSA, OK | First Oklahoma Bank |
| $350,000–1 million | SEASONS HOSPICE, INC. | TULSA, OK | CrossFirst Bank |
| $350,000–1 million | SECREST HILL BUTLER & SECREST P C | TULSA, OK | Commerce Bank |
| $150,000–350,000 | SELCO, LLC | TULSA, OK | Bank of Commerce |
| $2–5 million | SELECT ENGINEERING, INC. | TULSA, OK | Firstar Bank |
| $350,000–1 million | SELSERSCHAEFER ARCHITECTS, INC. | TULSA, OK | Commerce Bank |
| $150,000–350,000 | SENTINEL FIELD SERVICES, LLC | TULSA, OK | American Bank and Trust Company |
| $150,000–350,000 | SERVICE EXPRESS OKLAHOMA, LLC | TULSA, OK | First Oklahoma Bank |
| $150,000–350,000 | SEWELL MECHANICAL, INC | TULSA, OK | Security Bank |
| $350,000–1 million | SHAPEREXX LLC | TULSA, OK | BOKF, National Association |
| $150,000–350,000 | SHELTON & SHELTON MASONRY LLC | TULSA, OK | MapleMark Bank |
| $350,000–1 million | SHERWOOD HEALTH SERVICES LLC | TULSA, OK | Armstrong Bank |
| $150,000–350,000 | SHOEMAKER CORPORATION III | TULSA, OK | First Pryority Bank |
| $150,000–350,000 | SHORT OIL COMPANY | TULSA, OK | 1st Bank in Hominy |
| $350,000–1 million | SHORTLINE DENTAL, PLLC | TULSA, OK | Security Bank |
| $350,000–1 million | SIEGI'S SAUSAGE HOUSE, INC. | TULSA, OK | First Bank of Owasso |
| $150,000–350,000 | SIGNAL COMMUNICATIONS, INC. | TULSA, OK | Security Bank |
| $150,000–350,000 | SIGNAL FACTORY LLC | TULSA, OK | Vast Bank, National Association |
| $150,000–350,000 | SILEX INTERIORS, INC. | TULSA, OK | Arvest Bank |
| $1–2 million | SILICONE SPECIALTIES, INC. | TULSA, OK | BancFirst |
| $150,000–350,000 | SISEMORE & ASSOCIATES, INC. | TULSA, OK | RCB Bank |
| $150,000–350,000 | SISU ENERGY & ENVIRONMENTAL, LLC | TULSA, OK | RCB Bank |
| $350,000–1 million | SJCO HOLDINGS, LLC | TULSA, OK | Arvest Bank |
| $150,000–350,000 | SKIN CARE INSTITUTE | TULSA, OK | First Oklahoma Bank |
| $350,000–1 million | SKY OF JENKS, LLC | TULSA, OK | MapleMark Bank |
| $150,000–350,000 | SKYFIRE TRUCKING & HEAVY HAUL, INC | TULSA, OK | Arvest Bank |
| $350,000–1 million | SLIM HANEY MACHINING INC | TULSA, OK | BancFirst |
| $350,000–1 million | SMITHEY ENVIRONMENTAL SERVICES, INC. | TULSA, OK | AVB Bank |
| $150,000–350,000 | SMITHS GARDEN EQUIPMENT, INC. | TULSA, OK | BancFirst |
| $150,000–350,000 | SMOLEN LAW, PLLC | TULSA, OK | CS Bank |
| $150,000–350,000 | SMOLEN, SMOLEN & ROYTMAN, PLLC | TULSA, OK | Firstar Bank |
| $350,000–1 million | SODER MECHANICAL, INC | TULSA, OK | Security Bank |
| $150,000–350,000 | SOFTOUCH DEVELOPMENT,INC | TULSA, OK | Bank of America, National Association |
| $150,000–350,000 | SOL INDUSTRIES LLC | TULSA, OK | CrossFirst Bank |
| $5–10 million | SOLUTIONS THROUGH INNOVATIVE TECHNOLOGIES, INC. | TULSA, OK | SpiritBank |
| $350,000–1 million | SOONER MANUFACTURING CO INC | TULSA, OK | Security Bank |
| $350,000–1 million | SOUTH LEWIS SH OPCO, LLC | TULSA, OK | Centennial Bank |
| $150,000–350,000 | SOUTH TULSA PEDIATRICS PLLC | TULSA, OK | Prosperity Bank |
| $350,000–1 million | SOUTHERN AGRICULTURE | TULSA, OK | Arvest Bank |
| $150,000–350,000 | SOUTHERN HILLS BAPTIST CHURCH | TULSA, OK | First Oklahoma Bank |
| $350,000–1 million | SOUTHERN SHEET METAL WORKS, INC. | TULSA, OK | Security Bank |
| $150,000–350,000 | SOUTHSIDE DERMATOLOGY | TULSA, OK | The City National Bank and Trust Company of Lawton, Oklahoma |
| $150,000–350,000 | SOUTHWEST AVIATION SPECIALTIES, LLC | TULSA, OK | Security Bank |
| $150,000–350,000 | SOUTHWEST FILTER COMPANY | TULSA, OK | Mabrey Bank |
| $150,000–350,000 | SOUTHWEST STONE MASONRY LLC | TULSA, OK | Regent Bank |
| $150,000–350,000 | SOUTHWEST STONE, INC. | TULSA, OK | Regent Bank |
| $350,000–1 million | SOUTHWESTERN PAYROLL SERVICE, INC. | TULSA, OK | Prosperity Bank |
| $350,000–1 million | SOUTHWOOD LANDSCAPE & NURSERY CO., INC. | TULSA, OK | BOKF, National Association |
| $150,000–350,000 | SPECIAL EVENT SERVICES, L.L.C. | TULSA, OK | Arvest Bank |
| $150,000–350,000 | SPECIALTY BAKERY OF TULSA, INC. | TULSA, OK | American Heritage Bank |
| $350,000–1 million | SPECIALTY MATERIALS & DIGITAL DECORATION, LLC | TULSA, OK | American Heritage Bank |
| $1–2 million | SPECIFIC SYSTEMS, LLC | TULSA, OK | Prosperity Bank |
| $150,000–350,000 | SPECTRUM OF HOPE, LLC | TULSA, OK | First Pryority Bank |
| $2–5 million | SPECTRUM PAINT COMPANY, INC. | TULSA, OK | INTRUST Bank, National Association |
| $1–2 million | SPECTRUM PAINT EAST, LLC | TULSA, OK | INTRUST Bank, National Association |
| $150,000–350,000 | SPLISH SPLASH II LLC | TULSA, OK | Arvest Bank |
| $150,000–350,000 | SPORTS WORLD, INC. | TULSA, OK | Mabrey Bank |
| $150,000–350,000 | SPORTSMITH LLC | TULSA, OK | Simmons Bank |
| $150,000–350,000 | SPRING CREEK NURSERY, INC. | TULSA, OK | Stride Bank, National Association |
| $150,000–350,000 | SPRING TULSA, LLC | TULSA, OK | First Bank of Owasso |
| $1–2 million | SPRINGPOINT TECHNOLOGIES, L.L.C. | TULSA, OK | Grand Bank |
| $150,000–350,000 | ST. AUGUSTINE ACADEMY, INC. | TULSA, OK | Arvest Bank |
| $350,000–1 million | STAGHORN PETROLEUM II, LLC | TULSA, OK | BOKF, National Association |
| $350,000–1 million | STAN JOHNSON SERVICES, INC. | TULSA, OK | Arvest Bank |
| $2–5 million | STAND-BY PERSONNEL INC | TULSA, OK | Security Bank |
| $350,000–1 million | STANFIELD & O'DELL PC | TULSA, OK | BOKF, National Association |
| $150,000–350,000 | STANLEYS RENT TO OWN | TULSA, OK | Bank of Commerce |
| $350,000–1 million | STARR OILFIELD SERVICES | TULSA, OK | BancFirst |
| $150,000–350,000 | STATE BEAUTY SUPPLY OF OKLAHOMA INC | TULSA, OK | Arvest Bank |
| $150,000–350,000 | STATEWIDE GENERAL AGENCY | TULSA, OK | Arvest Bank |
| $150,000–350,000 | STAVA BUILDING LLC | TULSA, OK | Regent Bank |
| $150,000–350,000 | STEEL SERVICE OILFIELD TUBULAR, INC. | TULSA, OK | BOKF, National Association |
| $1–2 million | STEELTEK, INC. | TULSA, OK | BOKF, National Association |
| $350,000–1 million | STEIDLEY & NEAL PLLC | TULSA, OK | First National Bank & Trust Company of McAlester |
| $150,000–350,000 | STEPHEN W GROVES MD PC | TULSA, OK | Vast Bank, National Association |
| $2–5 million | STEPHENS FAMILY LIMITED PARTNERSHIP | TULSA, OK | SpiritBank |
| $150,000–350,000 | STEPHENSON OIL COMPANY, INC | TULSA, OK | First Pryority Bank |
| $350,000–1 million | STEVEN L WILSON & ASSOCIATES, CPA'S LLP | TULSA, OK | First Oklahoma Bank |
| $1–2 million | STINNET & ASSOCIATES | TULSA, OK | Arvest Bank |
| $1–2 million | STONEBRIDGE ACQUISITION, INC. | TULSA, OK | Commerce Bank |
| $350,000–1 million | STRATEGIC OPERATING SUPPORT LTD. CO. | TULSA, OK | First Oklahoma Bank |
| $150,000–350,000 | STREET SCHOOL, INC | TULSA, OK | BOKF, National Association |
| $350,000–1 million | STRESSCON, INC | TULSA, OK | BOKF, National Association |