| $150,000–350,000 | SOUTHERN SQUARES COMPANY, INC. | CLARENDON, AR | Simmons Bank |
| $350,000–1 million | SOUTHERNCROSS AMBULANCE INC | New Braunfels, TX | Simmons Bank |
| $350,000–1 million | SOUTHERNCROSS AMBULANCE, INC. | NEW BRAUNFELS, TX | Simmons Bank |
| $150,000–350,000 | SOUTHLAND LANDSCAPING INC. | Eads, TN | Simmons Bank |
| $150,000–350,000 | SOUTHLAND LANDSCAPING, INC. | EADS, TN | Simmons Bank |
| $350,000–1 million | SOUTHWEST AUTOPLEX III LLC | SHERMAN, TX | Simmons Bank |
| $350,000–1 million | SOUTHWEST CDJR LLC | CLEBURNE, TX | Simmons Bank |
| $150,000–350,000 | SOUTHWEST CHEVROLET LLC | KAUFMAN, TX | Simmons Bank |
| $2–5 million | SOUTHWEST FORD, INC. | WEATHERFORD, TX | Simmons Bank |
| $2–5 million | SOUTHWEST FUNDING, LP | DALLAS, TX | Simmons Bank |
| $350,000–1 million | SOUTHWEST NISSAN, LLC | WEATHERFORD, TX | Simmons Bank |
| $150,000–350,000 | SOUTHWEST PEDIATRIC ASSOCIATES OF SUGAR | Sugar Land, TX | Simmons Bank |
| $150,000–350,000 | SOUTHWEST PEDIATRIC ASSOCIATES OF SUGAR LAND, P.A. | SUGAR LAND, TX | Simmons Bank |
| $2–5 million | SOUTHWEST TENNESSEE ELECTRIC MEMBERSHIP CORPORATION | BROWNSVILLE, TN | Simmons Bank |
| $350,000–1 million | SOUTHWESTERN EXPOSITION & LIVESTOCK SHOW | FORT WORTH, TX | Simmons Bank |
| $350,000–1 million | SOUTHWESTERN EXPOSITION AND LIVESTOCK SHOW | Fort Worth, TX | Simmons Bank |
| $150,000–350,000 | SPA CONSTRUCTION CO INC | Hot Springs, AR | Simmons Bank |
| $150,000–350,000 | SPA CONSTRUCTION CO INC | Hot Springs, AR | Simmons Bank |
| $150,000–350,000 | SPACES GROUP, LLC | Cordova, TN | Simmons Bank |
| $150,000–350,000 | SPARTAN ENERGY SERVICES LLC | LAFAYETTE, LA | Simmons Bank |
| $1–2 million | SPARTAN FLOW CONTROL SERVICES, LLC | LAFAYETTE, LA | Simmons Bank |
| $350,000–1 million | SPARTAN THRU TUBING SERVICES LLC | LAFAYETTE, LA | Simmons Bank |
| $350,000–1 million | SPARTAN UTILITY SERVICES, LLC | CHANDLER, TX | Simmons Bank |
| $350,000–1 million | SPEA AMERICA LLC | TYLER, TX | Simmons Bank |
| $150,000–350,000 | SPECIAL SERVICES LEARNING CENTER, INC. | MARSHALL, AR | Simmons Bank |
| $350,000–1 million | SPECIALIZED SERVICES TRANSPORTATION INC | Stuttgart, AR | Simmons Bank |
| $350,000–1 million | SPECIALIZED SERVICES TRANSPORTATION, INC. | STUTTGART, AR | Simmons Bank |
| $350,000–1 million | SPECIALIZED TRANSPORT SERVICE INC | GARDEN RIDGE, TX | Simmons Bank |
| $150,000–350,000 | SPECTRUM PHOTONICS | Fallbrook, CA | Simmons Bank |
| $350,000–1 million | SPECTRUM PHOTONICS, INC. | HONOLULU, HI | Simmons Bank |
| $150,000–350,000 | SPEED-E'Z PHYSICIAN EXCHANGE, INC. | SAN ANTONIO, TX | Simmons Bank |
| $150,000–350,000 | SPINA BIFIDA ASSOCIATION OF AMERICA, INC. | Arlington, VA | Simmons Bank |
| $150,000–350,000 | SPINE & NEUROSURGERY SPECIALISTS OF AUSTIN, P.A. | AUSTIN, TX | Simmons Bank |
| $350,000–1 million | SPIRIT OF '76, L.L.C. | COLUMBIA, MO | Simmons Bank |
| $350,000–1 million | SPLASH KINGDOM INC | Canton, TX | Simmons Bank |
| $350,000–1 million | SPLASH KINGDOM, INC. | CANTON, TX | Simmons Bank |
| $150,000–350,000 | SPORTSMITH LLC | TULSA, OK | Simmons Bank |
| $150,000–350,000 | SPORTSMITH LLC | Tulsa, OK | Simmons Bank |
| $150,000–350,000 | SPRING CREEK GROWERS INC | MAGNOLIA, TX | Simmons Bank |
| $350,000–1 million | SPRINGFIELD HEALTHCARE MANAGEMENT, LLC | SPRINGFIELD, MO | Simmons Bank |
| $1–2 million | SPRINGFIELD MECHANICAL SERVICES INC. | Springfield, MO | Simmons Bank |
| $1–2 million | SPRINGFIELD MECHANICAL SERVICES, INC. | SPRINGFIELD, MO | Simmons Bank |
| $350,000–1 million | ST PAULS LUTHERAN CHURCH | Des Peres, MO | Simmons Bank |
| $150,000–350,000 | ST. FRANCIS OF ASSISI CATHOLIC CHURCH | GRAPEVINE, TX | Simmons Bank |
| $350,000–1 million | ST. JAMES UNITED METHODIST CHURCH | LITTLE ROCK, AR | Simmons Bank |
| $150,000–350,000 | ST. LOUIS APPLIANCE REPAIR CORPORATION | Fenton, MO | Simmons Bank |
| $150,000–350,000 | ST. MARTIN DE PORRES CATHOLIC SCHOOL | PROSPER, TX | Simmons Bank |
| $150,000–350,000 | ST. PHILIP CATHOLIC CHURCH | Franklin, TN | Simmons Bank |
| $150,000–350,000 | STACEY D. QUO DDS MS INC. | Palo Alto, CA | Simmons Bank |
| $350,000–1 million | STACY CONDER ALLEN, LLP | DALLAS, TX | Simmons Bank |
| $350,000–1 million | STADIUM AUTO BODY, INC. | JONESBORO, AR | Simmons Bank |
| $1–2 million | STAFFING TEXAS LLC | Conroe, TX | Simmons Bank |
| $1–2 million | STAFFING TEXAS, LLC | CONROE, TX | Simmons Bank |
| $150,000–350,000 | STAN CLARK COMPANIES INC. | Stillwater, OK | Simmons Bank |
| $150,000–350,000 | STAN CLARK COMPANIES, INC. | STILLWATER, OK | Simmons Bank |
| $350,000–1 million | STANDARD COMPONENTS LLC | Sterling Heights, MI | Simmons Bank |
| $350,000–1 million | STANDARD COMPONENTS, LLC | STERLING HEIGHTS, MI | Simmons Bank |
| $150,000–350,000 | START 2 FINISH LLC | Memphis, TN | Simmons Bank |
| $150,000–350,000 | START 2 FINISH LLC | MEMPHIS, TN | Simmons Bank |
| $2–5 million | STARTKLEEN LEGACY LLC | GUNTER, TX | Simmons Bank |
| $2–5 million | STATE SYSTEMS, INC. | MEMPHIS, TN | Simmons Bank |
| $150,000–350,000 | STEALTH POWER LLC | West Lake Hills, TX | Simmons Bank |
| $150,000–350,000 | STEALTH POWER, LLC | AUSTIN, TX | Simmons Bank |
| $150,000–350,000 | STEMMONS ENTERPRISE LLC | HOUSTON, TX | Simmons Bank |
| $150,000–350,000 | STENGER MANAGEMENT, L.L.C. | Springfield, MO | Simmons Bank |
| $150,000–350,000 | STENNETT'S S N S, INC. | BRANSON, MO | Simmons Bank |
| $150,000–350,000 | STENNETTS S N S II INC | Branson, MO | Simmons Bank |
| $150,000–350,000 | STENNETTS S N S INC | Branson, MO | Simmons Bank |
| $350,000–1 million | STEVE BEAM CONSTRUCTION INC. | FORT SMITH, AR | Simmons Bank |
| $150,000–350,000 | STEVE BEAM CONSTRUCTION INC. | Fort Smith, AR | Simmons Bank |
| $1–2 million | STEVE WOODSON INC | MABELVALE, AR | Simmons Bank |
| $150,000–350,000 | STEVEN D. PEDRO, M.D., P.A. | FORT WORTH, TX | Simmons Bank |
| $150,000–350,000 | STEVENS LEARNING SYSTEMS INC | Yukon, OK | Simmons Bank |
| $150,000–350,000 | STEVENS LEARNING SYSTEMS, INC. | YUKON, OK | Simmons Bank |
| $150,000–350,000 | STILLWATER BUILDING CENTER, INC. | STILLWATER, OK | Simmons Bank |
| $150,000–350,000 | STILLWATER DOMESTIC VIOLENCE SERVICES INC. | Stillwater, OK | Simmons Bank |
| $150,000–350,000 | STILLWATER DOMESTIC VIOLENCE SERVICES, INC. | STILLWATER, OK | Simmons Bank |
| $350,000–1 million | STILLWATER GROUP HOMES INC | STILLWATER, OK | Simmons Bank |
| $1–2 million | STILLWATER MILLING COMPANY, LLC | STILLWATER, OK | Simmons Bank |
| $150,000–350,000 | STINSON MATERIALS, INC. | MILL CREEK, OK | Simmons Bank |
| $150,000–350,000 | STL AIRPORT LODGING LLC | Saint Louis, MO | Simmons Bank |
| $150,000–350,000 | STL AIRPORT LODGING LLC | SAINT LOUIS, MO | Simmons Bank |
| $1–2 million | STONE ROAD ENERGY LLC | Concord, NH | Simmons Bank |
| $1–2 million | STONE ROAD ENERGY, LLC | CONCORD, NH | Simmons Bank |
| $150,000–350,000 | STONEBRIDGE PEDIATRICS P.A. | McKinney, TX | Simmons Bank |
| $150,000–350,000 | STONEBRIDGE PEDIATRICS, P.A. | MCKINNEY, TX | Simmons Bank |
| $150,000–350,000 | STONEBROOK, LLC | HUMBOLDT, TN | Simmons Bank |
| $150,000–350,000 | STOREY SAWMILL & LUMBER COMPANY, INC. | TROY, TN | Simmons Bank |
| $150,000–350,000 | STRATEGIC RADIOLOGY LLC | FORT WORTH, TX | Simmons Bank |
| $1–2 million | STRATEGY CORP | Brentwood, TN | Simmons Bank |
| $350,000–1 million | STRONG MANUFACTURING CO. INC. | PINE BLUFF, AR | Simmons Bank |
| $150,000–350,000 | STYLES ON BROADWAY | Martin, TN | Simmons Bank |
| $350,000–1 million | SUBURBAN BUILDERS, INC. | HOT SPRINGS NATIONAL PARK, AR | Simmons Bank |
| $350,000–1 million | SULLINS & JOHNSTON ATTORNEYS AT LAW PC | FLOWER MOUND, TX | Simmons Bank |
| $150,000–350,000 | SUMMIT ALLIANCE FINANCIAL LLP | DALLAS, TX | Simmons Bank |
| $150,000–350,000 | SUMMIT ALLIANCE FINANCIAL LLP | Dallas, TX | Simmons Bank |
| $350,000–1 million | SUMMIT EMPLOYMENT LLC | Wichita, KS | Simmons Bank |
| $2–5 million | SUMMIT MEDICAL CENTER LLC | Edmond, OK | Simmons Bank |
| $2–5 million | SUMMIT MEDICAL CENTER, LLC | EDMOND, OK | Simmons Bank |
| $350,000–1 million | SUMMIT REHAB LLC | ARDMORE, OK | Simmons Bank |