| $1–2 million | ST. LOUIS CHARTER SCHOOL | SAINT LOUIS, MO | Community Banks of Colorado, A Division of |
| $350,000–1 million | ST. LOUIS CHILDCARE HOLDINGS LLC | SAINT LOUIS, MO | Carrollton Bank |
| $350,000–1 million | ST. LOUIS COLLEGE OF HEALTH CAREERS | SAINT LOUIS, MO | Lindell Bank & Trust Company |
| $150,000–350,000 | ST. LOUIS CONTRACT EMBROIDERY, LLC | SAINT LOUIS, MO | U.S. Bank, National Association |
| $150,000–350,000 | ST. LOUIS COUNTY CAB COMPANY, INC. | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | ST. LOUIS CREMATION SERVICE INC. | SAINT LOUIS, MO | Carrollton Bank |
| $350,000–1 million | ST. LOUIS CRISIS NURSERY | SAINT LOUIS, MO | Carrollton Bank |
| $150,000–350,000 | ST. LOUIS DESIGN ALLIANCE, INC | SAINT LOUIS, MO | Triad Bank |
| $150,000–350,000 | ST. LOUIS ELECTRIC INC | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | ST. LOUIS EQUITY FUND, INC. | SAINT LOUIS, MO | Midland States Bank |
| $150,000–350,000 | ST. LOUIS EYE CLINIC | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | ST. LOUIS FORMALWEAR, INC. | SAINT LOUIS, MO | The Central Trust Bank |
| $350,000–1 million | ST. LOUIS HOME HEALTH INC. | SAINT LOUIS, MO | Carrollton Bank |
| $150,000–350,000 | ST. LOUIS HOMECARE LLC | SAINT LOUIS, MO | Independent Bank d/b/a Independent Financial |
| $350,000–1 million | ST. LOUIS LANGUAGE IMMERSION SCHOOL | SAINT LOUIS, MO | St. Louis Bank |
| $150,000–350,000 | ST. LOUIS MAGAZINE, LLC | SAINT LOUIS, MO | Southern Bank |
| $350,000–1 million | ST. LOUIS MEDICAL CLINIC, P.C. | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $350,000–1 million | ST. LOUIS MEDICAL SUPPLY, INC. | SAINT LOUIS, MO | Carrollton Bank |
| $1–2 million | ST. LOUIS METRO ELECTRIC SUPPLY, INC | SAINT LOUIS, MO | First Bank |
| $150,000–350,000 | ST. LOUIS MOTORCYCLE COMPANY, LLC | SAINT LOUIS, MO | CIBC Bank USA |
| $350,000–1 million | ST. LOUIS PAVING LLC | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | ST. LOUIS PRECISION CASTING COMPANY | SAINT LOUIS, MO | The Central Trust Bank |
| $1–2 million | ST. LOUIS REGIONAL PUBLIC MEDIA, INC. | SAINT LOUIS, MO | UMB Bank, National Association |
| $150,000–350,000 | ST. LOUIS RESTAURANT CONSULTING & WHOLSALE | SAINT LOUIS, MO | Midwest Regional Bank |
| $1–2 million | ST. LOUIS SCIENCE CENTER FOUNDATION | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | ST. LOUIS SOCIETY FOR THE BLIND AND VISUALLY IMPAIRED | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | ST. LOUIS SURFACE COMPANY LLC | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | ST. LOUIS TAG CO.,INC. | SAINT LOUIS, MO | Commerce Bank |
| $1–2 million | ST. LOUIS TESTING LABORATORIES, INC. | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | ST. LOUIS TITLE, LLC | SAINT LOUIS, MO | Midwest BankCentre |
| $350,000–1 million | ST. MARGARET OF SCOTLAND CATHOLIC CHURCH | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | ST. MARK CATHOLIC CHURCH-AFFTON | SAINT LOUIS, MO | Midwest BankCentre |
| $150,000–350,000 | ST. MARTHA'S HALL | SAINT LOUIS, MO | Sullivan Bank |
| $150,000–350,000 | ST. MARY MAGDALEN CATHOLIC CHURCHM BRENTWOOD | SAINT LOUIS, MO | Peoples National Bank, National Association |
| $1–2 million | ST. PATRICK CENTER | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | ST. PAUL UNITED CHURCH OF CHRIST | SAINT LOUIS, MO | Midwest BankCentre |
| $150,000–350,000 | ST. PIUS V CATHOLIC CHURCH | SAINT LOUIS, MO | Peoples National Bank, National Association |
| $150,000–350,000 | ST. RAPHAEL THE ARCHANGEL CATHOLIC CHURCH | SAINT LOUIS, MO | Triad Bank |
| $150,000–350,000 | ST. ROCH CATHOLIC CHURCH | SAINT LOUIS, MO | Peoples National Bank, National Association |
| $150,000–350,000 | ST. SIMON THE APOSTLE CHURCH | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | ST.LOUIS PRINT COMPANY LLC | SAINT LOUIS, MO | U.S. Bank, National Association |
| $1–2 million | STAAT INC | SAINT LOUIS, MO | Lindell Bank & Trust Company |
| $350,000–1 million | STAENBERG GROUP, INC. | SAINT LOUIS, MO | First Bank |
| $350,000–1 million | STAFFING RESOURCES, DBA FAST | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | STANTON BARTON LLC | SAINT LOUIS, MO | Bank Star |
| $150,000–350,000 | STARBEAM LIGHTING LLC | SAINT LOUIS, MO | Bank of America, National Association |
| $350,000–1 million | STATE MECHANICAL SERVICES INC | SAINT LOUIS, MO | U.S. Bank, National Association |
| $150,000–350,000 | STATEWIDE INVESTMENTS, LLC | SAINT LOUIS, MO | Triad Bank |
| $150,000–350,000 | STE GENEVIEVE DU BOIS CHURCH | SAINT LOUIS, MO | The Central Trust Bank |
| $350,000–1 million | STEADYRAIN, INCORPORATED | SAINT LOUIS, MO | Carrollton Bank |
| $350,000–1 million | STEALTH AGENCY LLC | SAINT LOUIS, MO | Midwest Regional 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 |
| $350,000–1 million | STL BAKING LLC - SAE4169 | SAINT LOUIS, MO | Busey 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 |
| $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 | The Central Trust Bank |
| $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 |
| $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 | The Central Trust Bank |
| $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 |