| $150,000–350,000 | HUFFORDS JEWELRY INC. | SAINT LOUIS, MO | Triad Bank |
| $150,000–350,000 | HUGHES AUTO BODY INC. | SAINT LOUIS, MO | Commerce Bank |
| $2–5 million | HUGHESLEAHYKARLOVIC, INC. | SAINT LOUIS, MO | Carrollton Bank |
| $1–2 million | HUMANE SOCIETY OF MISSOURI | SAINT LOUIS, MO | U.S. Bank, National Association |
| $150,000–350,000 | HUNT VAC SERVICES, LLC | SAINT LOUIS, MO | Midland States Bank |
| $350,000–1 million | HUNTLEIGH SECURITIES CORPORATION | SAINT LOUIS, MO | St. Louis Bank |
| $150,000–350,000 | HUSTLE UP LLC | SAINT LOUIS, MO | First Bank |
| $150,000–350,000 | HUTKIN DEVELOPMENT COMPANY | SAINT LOUIS, MO | Midwest BankCentre |
| $150,000–350,000 | HUTSON GOBBLE LLC | SAINT LOUIS, MO | PNC Bank, National Association |
| $350,000–1 million | HWI ENVIRONMENTAL TECHNOLOGIES, INC. | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | HWI EQUIPMENT, INC. | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $350,000–1 million | HY-C COMPANY LLC | SAINT LOUIS, MO | Carrollton Bank |
| $350,000–1 million | HYDE HEATING AND SHEET METAL INC | SAINT LOUIS, MO | Cass Commercial Bank |
| $150,000–350,000 | HYDRO DYNAMICS CORPORATION | SAINT LOUIS, MO | Bank of America, National Association |
| $150,000–350,000 | HYDRO-KINETICS CORP | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | HYMAN PROPERTIES, INC. | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | HYSON INTERNATIONAL CORP. | SAINT LOUIS, MO | First Bank |
| $150,000–350,000 | I & I, INC. | SAINT LOUIS, MO | Cass Commercial Bank |
| $1–2 million | IBRIDGE SOLUTIONS, LLC | SAINT LOUIS, MO | Carrollton Bank |
| $150,000–350,000 | ICD HOLDINGS, LLC | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | ICON CONTRACTING INC. | SAINT LOUIS, MO | Carrollton Bank |
| $150,000–350,000 | ICON DESIGN LLC | SAINT LOUIS, MO | Busey Bank |
| $1–2 million | ICS CONSTRUCTION SERVICES, LTD. | SAINT LOUIS, MO | The Central Trust Bank |
| $150,000–350,000 | IDEAL RECOVERY INC | SAINT LOUIS, MO | Midwest Regional Bank |
| $150,000–350,000 | ILLUSIONS COLOR SPA INC | SAINT LOUIS, MO | Midwest BankCentre |
| $150,000–350,000 | IMMANUEL LUTHERAN CHURCH | SAINT LOUIS, MO | Carrollton Bank |
| $150,000–350,000 | IMPACT ARCHITECTURAL LIGHTING, LLC | SAINT LOUIS, MO | Carrollton Bank |
| $150,000–350,000 | IMRIE GIELOW INC | SAINT LOUIS, MO | Cass Commercial Bank |
| $150,000–350,000 | IN GOOD COMPANY LLC | SAINT LOUIS, MO | Associated Bank, National Association |
| $350,000–1 million | INCARNATE WORD ACADEMY | SAINT LOUIS, MO | Commerce Bank |
| $350,000–1 million | INDEPENDENTS GRAPHIC AND DISPLAY, LLC | SAINT LOUIS, MO | UMB Bank, National Association |
| $2–5 million | INDOFF GOLDEN | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | INDOX SERVICES | SAINT LOUIS, MO | Royal Banks of Missouri |
| $150,000–350,000 | INDUS IT VALLEY INC | SAINT LOUIS, MO | Bank of America, National Association |
| $350,000–1 million | INDUSTRIAL AID INC | SAINT LOUIS, MO | Busey Bank |
| $1–2 million | INDUSTRIAL BATTERY PRODUCTS INC. | SAINT LOUIS, MO | Carrollton Bank |
| $2–5 million | INDUSTRIAL CONTROL CONCEPTS, INC | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | INDUSTRIAL SHELVING SYSTEMS, INC | SAINT LOUIS, MO | Commerce Bank |
| $350,000–1 million | INDUSTRIAL SOAP COMPANY | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | INFECTIOUS DISEASES PC | SAINT LOUIS, MO | Bank of America, National Association |
| $350,000–1 million | INNKEEPER HOSPITALITY SERVICES LLC | SAINT LOUIS, MO | The Bank of Houston |
| $150,000–350,000 | INNOVATIVE CLAIMS SERVICE, LLC | SAINT LOUIS, MO | First Bank |
| $350,000–1 million | INNOVATIVE CONSTRUCTION & ROOFING | SAINT LOUIS, MO | PNC Bank, National Association |
| $150,000–350,000 | INNOVATIVE HOME CARE SOLUTIONS LLC | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | INNOVATIVE SOLUTIONS, INC. | SAINT LOUIS, MO | Triad Bank |
| $150,000–350,000 | INNOVATIVE TIMING SYSTEMS, LLC | SAINT LOUIS, MO | Busey Bank |
| $350,000–1 million | INROADS, INC | SAINT LOUIS, MO | Citizens Trust Bank |
| $350,000–1 million | INSEQUENCE, INC. | SAINT LOUIS, MO | Arsenal CU |
| $350,000–1 million | INSULATING AND SUPPLIES CORPORATION | SAINT LOUIS, MO | Carrollton Bank |
| $150,000–350,000 | INSULATION MASTERS, INC. | SAINT LOUIS, MO | U.S. Bank, National Association |
| $150,000–350,000 | INTACT GENOMICS, INC | SAINT LOUIS, MO | Bank of America, National Association |
| $350,000–1 million | INTEGRITY TITLE SOLUTIONS, LLC | SAINT LOUIS, MO | Triad Bank |
| $350,000–1 million | INTEGRITY WEB CONSULTING INC | SAINT LOUIS, MO | PNC Bank, National Association |
| $350,000–1 million | INTELLICA COMMERCIAL REAL ESTATE COMPANY | SAINT LOUIS, MO | Peoples National Bank, National Association |
| $350,000–1 million | INTER-GLOBAL INC | SAINT LOUIS, MO | UMB Bank, National Association |
| $1–2 million | INTERCARD INC. | SAINT LOUIS, MO | Busey Bank |
| $1–2 million | INTERCON CHEMICAL COMPANY | SAINT LOUIS, MO | CNB Bank and Trust, National Association |
| $1–2 million | INTERFACE CONSTRUCTION CO | SAINT LOUIS, MO | Regions Bank |
| $350,000–1 million | INTERFAITH RESIDENCE | SAINT LOUIS, MO | Busey Bank |
| $1–2 million | INTERIOR SYSTEMS CONTRACTING, INC. | SAINT LOUIS, MO | U.S. Bank, National Association |
| $1–2 million | INTERLACE HEALTH LLC | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | INTERNATIONAL CRISIS AID | SAINT LOUIS, MO | Southern Bank |
| $150,000–350,000 | INTERNATIONAL DESIGN SERVICES, INC. | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | INTERNATIONAL INSTITUTE OF METROPOLITAN ST. LOUIS | SAINT LOUIS, MO | Commerce Bank |
| $1–2 million | INTERNATIONAL LUTHERAN LAYMENS LEAGUE | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | INTERNATIONAL PRODUCTS GROUP, LLC | SAINT LOUIS, MO | Justine Petersen Housing & Reinvestment Corporation |
| $1–2 million | INTERSTATE CLEANING CORPORATION | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $350,000–1 million | INTERVENTIONAL CENTER FOR PAIN MANAGEMENT, P.C. | SAINT LOUIS, MO | Associated Bank, National Association |
| $1–2 million | INTOXIMETERS | SAINT LOUIS, MO | UMB Bank, National Association |
| $1–2 million | INVESTORS TITLE COMPANY | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $350,000–1 million | INVISIBLY, INC | SAINT LOUIS, MO | West Community CU |
| $150,000–350,000 | IPC ST LOUIS, LLC | SAINT LOUIS, MO | Regent Bank |
| $150,000–350,000 | IPM SERVICES INC | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | IRWIN PRODUCTS INC | SAINT LOUIS, MO | Carrollton Bank |
| $150,000–350,000 | ISELECT FUND MANAGEMENT, LLC | SAINT LOUIS, MO | Carrollton Bank |
| $350,000–1 million | J & C ENTERPRISES, INC. | SAINT LOUIS, MO | Triad Bank |
| $150,000–350,000 | J & F INDUSTRIES, INC | SAINT LOUIS, MO | Bank of Franklin County |
| $150,000–350,000 | J & G PIZZA INC. | SAINT LOUIS, MO | Peoples National Bank, National Association |
| $150,000–350,000 | J E REDINGTON CO | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | J-KEM SCIENTIFIC INC | SAINT LOUIS, MO | Lindell Bank & Trust Company |
| $150,000–350,000 | J. WEST ELECTRICAL CONTRACTING, LLC | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | J.P. COLLIER, INC | SAINT LOUIS, MO | Bank Star |
| $5–10 million | J.S. LEASING COMPANY, INC. | SAINT LOUIS, MO | Carrollton Bank |
| $350,000–1 million | J.S. WEINMANN, INC. DBA KENRICK'S MEATS & CATERING | SAINT LOUIS, MO | Midwest BankCentre |
| $150,000–350,000 | JACKMAN'S INC | SAINT LOUIS, MO | Lindell Bank & Trust Company |
| $350,000–1 million | JAMES G STAAT TUCKPOINTING INC | SAINT LOUIS, MO | Lindell Bank & Trust Company |
| $150,000–350,000 | JAMES L. SCHMIDT, D.D.S., P.C. | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $350,000–1 million | JAMES MULLIGAN PRINTING COMPANY | SAINT LOUIS, MO | FCB Banks |
| $150,000–350,000 | JAMES SURVEYING COMPANY | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | JANET MCAFEE INC. | SAINT LOUIS, MO | CIBC Bank USA |
| $150,000–350,000 | JANITRON MAINTENANCE MANAGEMENT SERVICES | SAINT LOUIS, MO | Royal Banks of Missouri |
| $150,000–350,000 | JAVELIN INC | SAINT LOUIS, MO | Midwest Regional Bank |
| $150,000–350,000 | JAY ELECTRIC CO LLC | SAINT LOUIS, MO | Midland States Bank |
| $1–2 million | JAY F. HAUSER, D.D.S., P.C. | SAINT LOUIS, MO | Bank of America, National Association |
| $150,000–350,000 | JAZZ ST LOUIS | SAINT LOUIS, MO | Busey Bank |
| $1–2 million | JB MARINE SERVICE, INC. | SAINT LOUIS, MO | Lindell Bank & Trust Company |
| $150,000–350,000 | JCV PRODUCTIONS INC. | SAINT LOUIS, MO | Midwest Regional Bank |
| $150,000–350,000 | JDC RESTAURANTS INC | SAINT LOUIS, MO | Royal Banks of Missouri |
| $350,000–1 million | JEDMED INSTRUMENT COMPANY | SAINT LOUIS, MO | Carrollton Bank |
| $150,000–350,000 | JEMA, LLC | SAINT LOUIS, MO | First Bank |