| $350,000–1 million | STEADYRAIN, INC | SAINT LOUIS, MO | Carrollton Bank |
| $350,000–1 million | STEALTH AGENCY LLC | SAINT LOUIS, MO | Midwest Regional Bank |
| $150,000–350,000 | STEP AHEAD CHILDCARE ACADEMY INC | SAINT LOUIS, MO | Carrollton Bank |
| $350,000–1 million | STEPHEN MINISTRIES | SAINT LOUIS, MO | Commerce Bank |
| $350,000–1 million | STEPHENS FLOOR COVERING CO. | SAINT LOUIS, MO | Carrollton Bank |
| $2–5 million | STEREOTAXIS, INC | SAINT LOUIS, MO | Midwest BankCentre |
| $350,000–1 million | STERN BROTHERS & CO. | SAINT LOUIS, MO | Cedar Rapids Bank and Trust Company |
| $350,000–1 million | STILWELL HOLDING COMPANY LLC | SAINT LOUIS, MO | Midwest Regional Bank |
| $150,000–350,000 | STL AIRPORT LODGING LLC | SAINT LOUIS, MO | Simmons Bank |
| $150,000–350,000 | STL CONTRACTOR HOLDINGS, INC. | SAINT LOUIS, MO | St. Louis Bank |
| $150,000–350,000 | STL ENGINEERING, LLC | SAINT LOUIS, MO | Bank Star |
| $150,000–350,000 | STL FAMILY DENTISTRY INC | SAINT LOUIS, MO | First Mid Bank & Trust, National Association |
| $350,000–1 million | STLOUISDIGITAL.COM, LLC | SAINT LOUIS, MO | Bank of Franklin County |
| $350,000–1 million | STONE,LEYTON& GERSHMAN | SAINT LOUIS, MO | Triad Bank |
| $350,000–1 million | STOUT SIGN COMPANY | SAINT LOUIS, MO | Parkside Financial Bank & Trust |
| $1–2 million | STRAIGHTUP SOLAR, LLC | SAINT LOUIS, MO | Midland States Bank |
| $150,000–350,000 | STRANGE ALLEGRO INC | SAINT LOUIS, MO | Triad Bank |
| $2–5 million | STRATUS MIDCO, INC | SAINT LOUIS, MO | West Community CU |
| $150,000–350,000 | STREAMTECH ENGINEERING LLC | SAINT LOUIS, MO | Busey Bank |
| $1–2 million | STREIB COMPANY, INC | SAINT LOUIS, MO | Carrollton Bank |
| $150,000–350,000 | STRYKER CONSTRUCTION, LLC | SAINT LOUIS, MO | Triad Bank |
| $150,000–350,000 | STUART D. WAITE, DDS PC | SAINT LOUIS, MO | Commerce Bank |
| $350,000–1 million | STUTTE TILE CO,. INC. | SAINT LOUIS, MO | Midwest BankCentre |
| $1–2 million | SUBSURFACE CONSTRUCTORS INC | SAINT LOUIS, MO | Commerce Bank |
| $350,000–1 million | SUBURBAN INDUSTRIAL PACKAGING, INC. | SAINT LOUIS, MO | Central Bank of St. Louis |
| $350,000–1 million | SUBURBAN PEDIATRICS, INC. | SAINT LOUIS, MO | Midwest Regional Bank |
| $350,000–1 million | SUGAR CREEK REALTY LLC | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $1–2 million | SUITE MEDIA PRODUCTIONS & MANAGEMENT LLC | SAINT LOUIS, MO | Cross River Bank |
| $150,000–350,000 | SULLIVAN ASPHALT AND CONSTRUCTION CO | SAINT LOUIS, MO | Commerce Bank |
| $350,000–1 million | SUMMERS COMPTON WELLS LLC | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $350,000–1 million | SUMMIT DEVELOPMENT GROUP, LLC | SAINT LOUIS, MO | Triad Bank |
| $5–10 million | SUMNERONE INC | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | SUNDANCE CLINICAL RESEARCH LLC | SAINT LOUIS, MO | St. Louis Bank |
| $350,000–1 million | SUNFARM FOOD SERVICE, INC | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $5–10 million | SUNNEN PRODUCTS COMPANY | SAINT LOUIS, MO | CIBC Bank USA |
| $1–2 million | SUNSET AUTO COMPANY, INC | SAINT LOUIS, MO | Central Bank of St. Louis |
| $350,000–1 million | SUNSET HILLS DENTAL, L.L.C. | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $2–5 million | SUNSET TRANSPORTATION, INC. | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | SUNSHINE IMPORTS, INC. | SAINT LOUIS, MO | 1st Advantage Bank |
| $350,000–1 million | SUNTRUP HYUNDAI, INC. | SAINT LOUIS, MO | St. Louis Bank |
| $150,000–350,000 | SUPERIOR ACQUISITION LLC | SAINT LOUIS, MO | Bank of Springfield |
| $350,000–1 million | SUPERIOR BUILDING GROUP LLC | SAINT LOUIS, MO | Carrollton Bank |
| $350,000–1 million | SUPERIOR FASTENER CO., INC | SAINT LOUIS, MO | UMB Bank, National Association |
| $150,000–350,000 | SUPERIOR IN HOME SERVICES LLC | SAINT LOUIS, MO | Cross River Bank |
| $350,000–1 million | SUPERIOR WATERPROOFING AND RESTORATION COMPANY, INC. | SAINT LOUIS, MO | Cass Commercial Bank |
| $350,000–1 million | SUPERVAN SERVICE CO, INC | SAINT LOUIS, MO | Midwest BankCentre |
| $150,000–350,000 | SUPPLEMENTAL MEDICAL SERVICES, INC. | SAINT LOUIS, MO | Great Southern Bank |
| $150,000–350,000 | SUPPORT INNOVATIONS INC | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | SURCO INC | SAINT LOUIS, MO | Commercial Bank |
| $150,000–350,000 | SURGICAL DIRECT, INC. | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | SWAN INDUSTRIES INC | SAINT LOUIS, MO | PNC Bank, National Association |
| $2–5 million | SWANK MOTION PICTURES INC | SAINT LOUIS, MO | Bank of America, National Association |
| $350,000–1 million | SWIFT PRINT COMMUNICATION SERVICES, LLC | SAINT LOUIS, MO | UMB Bank, National Association |
| $350,000–1 million | SWINGTIDE INC | SAINT LOUIS, MO | U.S. Bank, National Association |
| $350,000–1 million | SWINK COPLEN & COMPANY PC | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $350,000–1 million | SWISS AMERICAN INC. | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $350,000–1 million | SWITZER INDUSTRIES | SAINT LOUIS, MO | UMB Bank, National Association |
| $350,000–1 million | SWMW LAW, LLC | SAINT LOUIS, MO | Triad Bank |
| $150,000–350,000 | SYBERG'S CAPITAL GROUP | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | SYBERG'S EATING AND DRINKING COMPANY, INC. | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | SYBERG'S ON MARKET STREET, INC. | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | SYSTEMS GRAPHICS INC | SAINT LOUIS, MO | Carrollton Bank |
| $2–5 million | SYSTEMS SERVICE ENTERPRISES, INC. | SAINT LOUIS, MO | Triad Bank |
| $150,000–350,000 | T C CLOTHIERS, INC. | SAINT LOUIS, MO | Central Bank of St. Louis |
| $350,000–1 million | T-KARTOR USA CORPORATION | SAINT LOUIS, MO | First Bank |
| $350,000–1 million | T. C. JACOBY & COMPANY, INC. | SAINT LOUIS, MO | BMO Harris Bank National Association |
| $150,000–350,000 | T.J.'S PIZZA COMPANY, INC. | SAINT LOUIS, MO | St. Louis Bank |
| $150,000–350,000 | TALBERT INDUSTRIAL COMMERCIAL SERVICES, INC. | SAINT LOUIS, MO | Carrollton Bank |
| $350,000–1 million | TALISEN TECHNOLOGIES, INC. | SAINT LOUIS, MO | Montgomery Bank |
| $5–10 million | TARLTON CORPORATION | SAINT LOUIS, MO | Simmons Bank |
| $150,000–350,000 | TAVCO HOLDINGS I LLC | SAINT LOUIS, MO | Midwest Regional Bank |
| $350,000–1 million | TAYLOR & ASSOCIATES COURT REPO | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $350,000–1 million | TCI PRODUCTS, INC. | SAINT LOUIS, MO | UMB Bank, National Association |
| $350,000–1 million | TCS, LLC | SAINT LOUIS, MO | Carrollton Bank |
| $350,000–1 million | TD4, LLC | SAINT LOUIS, MO | Central Bank of St. Louis |
| $150,000–350,000 | TECHNICAL PRODUCTIONS INC. | SAINT LOUIS, MO | FortuneBank |
| $150,000–350,000 | TECHNOLOGY ENTREPRENEUR CENTER, INC. | SAINT LOUIS, MO | Carrollton Bank |
| $350,000–1 million | TECHNOLOGY SOLUTIONS, INC. | SAINT LOUIS, MO | BMO Harris Bank National Association |
| $350,000–1 million | TED DREWES, INC | SAINT LOUIS, MO | Lindell Bank & Trust Company |
| $350,000–1 million | TEE TURTLE, LLC | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | TEKWANI VISION CENTERS | SAINT LOUIS, MO | Midland States Bank |
| $350,000–1 million | TELLE TIRE & AUTO SERVICE, INC. | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | TENNANT LANDSCAPE SOLUTIONS, INC | SAINT LOUIS, MO | Regions Bank |
| $150,000–350,000 | TERMAR CORPORATION | SAINT LOUIS, MO | Carrollton Bank |
| $150,000–350,000 | TGB INC | SAINT LOUIS, MO | St. Louis Bank |
| $350,000–1 million | THALDEN CORPORATION | SAINT LOUIS, MO | Midwest BankCentre |
| $150,000–350,000 | THAM CORPORATION | SAINT LOUIS, MO | Providence Bank |
| $350,000–1 million | THE ADVERTISERS PRINTING COMPANY INC | SAINT LOUIS, MO | Cass Commercial Bank |
| $150,000–350,000 | THE AMYOTROPHIC LATERAL SCLEROSIS ASSOCIATION ST LOUIS REGIONAL CHAPTER | SAINT LOUIS, MO | Associated Bank, National Association |
| $350,000–1 million | THE BAR PLAN MUTUAL INSURANCE COMPANY | SAINT LOUIS, MO | Midwest BankCentre |
| $150,000–350,000 | THE BEST STEAK HOUSE, INC. | SAINT LOUIS, MO | U.S. Bank, National Association |
| $150,000–350,000 | THE BIOME | SAINT LOUIS, MO | Simmons Bank |
| $150,000–350,000 | THE BIRDSONG CO | SAINT LOUIS, MO | PNC Bank, National Association |
| $150,000–350,000 | THE BODEGA MEXICANA WHOLESALE | SAINT LOUIS, MO | Peoples Savings Bank of Rhineland |
| $150,000–350,000 | THE BRENNAN GROUP, LLC | SAINT LOUIS, MO | Midwest BankCentre |
| $350,000–1 million | THE CENTER FOR HEAD INJURY SERVICES, INC. | SAINT LOUIS, MO | Bank of Franklin County |
| $1–2 million | THE CHILDREN'S HOME SOCIETY OF MISSOURI | SAINT LOUIS, MO | First Bank |
| $350,000–1 million | THE CHILDRENS CLINIC, INC. | SAINT LOUIS, MO | Central Bank of St. Louis |
| $350,000–1 million | THE CITY'S FINEST, LLC | SAINT LOUIS, MO | West Community CU |
| $150,000–350,000 | THE CLAYTON ENGINEERING COMPANY, INC. | SAINT LOUIS, MO | Carrollton Bank |