| $150,000–350,000 | MID-WEST INDUSTRIAL CHEMICAL CO. | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | MID-WEST PLATING COMPANY | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $5–10 million | MIDAS HOSPITALITY LLC | SAINT LOUIS, MO | Simmons Bank |
| $350,000–1 million | MIDTOWNE, LLC | SAINT LOUIS, MO | Midland States Bank |
| $350,000–1 million | MIDVALE INDUSTRIES, INC. | SAINT LOUIS, MO | PNC Bank, National Association |
| $150,000–350,000 | MIDWEST AUTOMATION INC | SAINT LOUIS, MO | The Central Trust Bank |
| $2–5 million | MIDWEST ELEVATOR CO., INC. | SAINT LOUIS, MO | BMO Bank National Association |
| $350,000–1 million | MIDWEST GLAZING SYSTEMS LLC | SAINT LOUIS, MO | St. Louis Bank |
| $150,000–350,000 | MIDWEST MACHINING SOLUTIONS LLC | SAINT LOUIS, MO | PNC Bank, National Association |
| $150,000–350,000 | MIDWEST PODIATRY AND ASSOCIATES LLC | SAINT LOUIS, MO | The Central Trust Bank |
| $150,000–350,000 | MIDWEST REFRIGERATION & SUPPLY COMPANY | SAINT LOUIS, MO | Midwest BankCentre |
| $150,000–350,000 | MIDWEST RETAIL PROPERTIES, LLC | SAINT LOUIS, MO | Peoples National Bank, National Association |
| $350,000–1 million | MIDWEST RV CENTER, LLC | SAINT LOUIS, MO | Midwest BankCentre |
| $150,000–350,000 | MIDWEST STAFFING SOLUTIONS LLC | SAINT LOUIS, MO | The Central Trust Bank |
| $150,000–350,000 | MIDWEST SUBSURFACE TESTING, LLC | SAINT LOUIS, MO | Cass Commercial Bank |
| $150,000–350,000 | MIDWEST THERAPY LLC | SAINT LOUIS, MO | PNC Bank, National Association |
| $150,000–350,000 | MIDWEST VALVE & CONTROLS, INC. | SAINT LOUIS, MO | Great Southern Bank |
| $150,000–350,000 | MIKE'S AUTOMOTIVE MACHINE SHOP, INC. | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | MILBRADT LAWN EQUIPMENT CO. | SAINT LOUIS, MO | Bank of Belleville |
| $350,000–1 million | MILFORD SUPPLY CO. | SAINT LOUIS, MO | Midwest BankCentre |
| $350,000–1 million | MILLENIUM PAIN MANAGEMENT LLC | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | MILLENIUM PSYCHIATRIC ASSOCIATES, LLC | SAINT LOUIS, MO | PNC Bank, National Association |
| $350,000–1 million | MILLENNIUM MANAGEMENT & CONSULTING, INC. | SAINT LOUIS, MO | Busey Bank |
| $350,000–1 million | MILLER AND STEENO, P.C. | SAINT LOUIS, MO | The Central Trust Bank |
| $150,000–350,000 | MILLIS ANIMAL HOSPITAL, LLC | SAINT LOUIS, MO | The Central Trust Bank |
| $2–5 million | MILLMAN LUMBER COMPANY | SAINT LOUIS, MO | UMB Bank, National Association |
| $150,000–350,000 | MINER'S TOWING CO., INC | SAINT LOUIS, MO | The Central Trust Bank |
| $350,000–1 million | MINIATURE MARKET LLC | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | MIRA CONFERENCE, INC. | SAINT LOUIS, MO | Commerce Bank |
| $1–2 million | MIRIAM FOUNDATION | SAINT LOUIS, MO | Midwest BankCentre |
| $350,000–1 million | MISS ELAINE, INC. | SAINT LOUIS, MO | U.S. Bank, National Association |
| $150,000–350,000 | MISS SHERI'S CAFETERIA INC | SAINT LOUIS, MO | PNC Bank, National Association |
| $150,000–350,000 | MISSION TACO LLC | SAINT LOUIS, MO | Triad Bank |
| $150,000–350,000 | MISSION: ST. LOUIS | SAINT LOUIS, MO | Justine Petersen Housing & Reinvestment Corporation |
| $350,000–1 million | MISSOURI ANALYTICAL LABORATORIES, INC. | SAINT LOUIS, MO | U.S. Bank, National Association |
| $2–5 million | MISSOURI BAPTIST UNIVERSITY | SAINT LOUIS, MO | Cass Commercial Bank |
| $2–5 million | MISSOURI BOTANICAL GARDEN, BD OF TRUSTEES | SAINT LOUIS, MO | Commerce Bank |
| $350,000–1 million | MISSOURI COBALT LLC | SAINT LOUIS, MO | CIBC Bank USA |
| $150,000–350,000 | MISSOURI ELEVATOR & ESCALATOR, INC. | SAINT LOUIS, MO | St. Johns Bank and Trust Company |
| $150,000–350,000 | MISSOURI EQUIPMENT COMPANY | SAINT LOUIS, MO | Bank of Franklin County |
| $350,000–1 million | MISSOURI GENERAL INSURANCE AGENCY, INC. | SAINT LOUIS, MO | Commercial Bank |
| $1–2 million | MISSOURI HISTORICAL SOCIETY | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | MISSOURI HUMANITIES COUNCIL | SAINT LOUIS, MO | The Central Trust Bank |
| $150,000–350,000 | MISSOURI JOBS WITH JUSTICE | SAINT LOUIS, MO | Lindell Bank & Trust Company |
| $150,000–350,000 | MISSOURI KING, LLC | SAINT LOUIS, MO | Fifth Third Bank |
| $350,000–1 million | MISSOURI MACHINERY & ENGINEERING CO | SAINT LOUIS, MO | UMB Bank, National Association |
| $350,000–1 million | MISSOURI PIPE FITTINGS COMPANY | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | MISSOURI RIVER LODGING COMPANY LLC | SAINT LOUIS, MO | Carrollton Bank |
| $150,000–350,000 | MITCHELL TIRE SERVICE | SAINT LOUIS, MO | Great Southern Bank |
| $150,000–350,000 | MITCHELL WALL - ASSOCIATES INC | SAINT LOUIS, MO | First Commerce Bank |
| $350,000–1 million | MLP MANAGEMENT LLC | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | MLT GROUP INC | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | MM EXPRESS LLC | SAINT LOUIS, MO | PNC Bank, National Association |
| $150,000–350,000 | MMMMMDP LLC | SAINT LOUIS, MO | Triad Bank |
| $1–2 million | MNG 2005 INC. | SAINT LOUIS, MO | Midwest Regional Bank |
| $150,000–350,000 | MO MELLOW, LLC | SAINT LOUIS, MO | Carrollton Bank |
| $150,000–350,000 | MOBILIS HEALTH, LLC | SAINT LOUIS, MO | Great Southern Bank |
| $150,000–350,000 | MOBIUS THERAPEUTICS, LLC | SAINT LOUIS, MO | Busey Bank |
| $1–2 million | MOCAP LLC | SAINT LOUIS, MO | Bank of America, National Association |
| $150,000–350,000 | MODEL TECHNOLOGY SOLUTIONS LLC | SAINT LOUIS, MO | Bank of Washington |
| $150,000–350,000 | MODERN AUTO PARTS, INC. | SAINT LOUIS, MO | Midwest BankCentre |
| $150,000–350,000 | MODERN CONTRACTORS LLC | SAINT LOUIS, MO | U.S. Bank, National Association |
| $150,000–350,000 | MODULAR PROCESS CONTROL LLC | SAINT LOUIS, MO | Bank of Springfield |
| $150,000–350,000 | MOGENE, LC | SAINT LOUIS, MO | Midwest BankCentre |
| $150,000–350,000 | MONOCLE, INC. | SAINT LOUIS, MO | Busey Bank |
| $350,000–1 million | MOORE COMPUTING, LLP | SAINT LOUIS, MO | The Central Trust Bank |
| $350,000–1 million | MOOSYLVANIA MARKETING, L.C. | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | MORE FOR LESS REMODELING, LLC | SAINT LOUIS, MO | Montgomery Bank |
| $350,000–1 million | MOREABLE, LLC | SAINT LOUIS, MO | Midwest BankCentre |
| $150,000–350,000 | MORGAN FORD MASSAGE THERAPY, LLC | SAINT LOUIS, MO | American Bank of Freedom |
| $150,000–350,000 | MORGNER, INC. | SAINT LOUIS, MO | Montgomery Bank |
| $150,000–350,000 | MORICE, LIST & ASSOCIATES, LLC | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | MORROW HOLDINGS INC. | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | MOSAIC FAMILY WEALTH, LLC | SAINT LOUIS, MO | Midland States Bank |
| $1–2 million | MOSBY BUILDING ARTS LTD | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $350,000–1 million | MOTIVATION TECHNOLOGIES, LLC | SAINT LOUIS, MO | Triad Bank |
| $1–2 million | MPAL REAL ESTATE, LLC | SAINT LOUIS, MO | Simmons Bank |
| $150,000–350,000 | MPR SUPPLY COMPANY | SAINT LOUIS, MO | Triad Bank |
| $150,000–350,000 | MTJ CROSSROADS, LLC | SAINT LOUIS, MO | Triad Bank |
| $150,000–350,000 | MTJ CWE, LLC | SAINT LOUIS, MO | Triad Bank |
| $350,000–1 million | MTJ SOULARD, LLC | SAINT LOUIS, MO | Triad Bank |
| $150,000–350,000 | MTJ SOUTH PLAZA, LLC | SAINT LOUIS, MO | Triad Bank |
| $350,000–1 million | MTJ ST. CHARLES, LLC | SAINT LOUIS, MO | Triad Bank |
| $150,000–350,000 | MUELLER INDUSTRIES, L.L.C. | SAINT LOUIS, MO | Montgomery Bank |
| $2–5 million | MUELLER PROST LC | SAINT LOUIS, MO | Carrollton Bank |
| $1–2 million | MULTI-AERO INC. | SAINT LOUIS, MO | Bloomsdale Bank |
| $1–2 million | MUNICIPAL THEATRE ASSOCIATION OF ST. LOUIS | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | MUNSCH OUTDOOR MAINTENANCE COMPANY INC | SAINT LOUIS, MO | Midland States Bank |
| $150,000–350,000 | MURRAY'S TRAVEL CENTRE, LTD | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $350,000–1 million | MUSEUM HOLDINGS, LLC | SAINT LOUIS, MO | Customers Bank |
| $350,000–1 million | MYBRANDPROMO INC. | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $2–5 million | N. B. WEST CONTRACTING CO. | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | NATIONAL BENEVOLENT ASSOCIATION OF THE CHRISTIAN CHURCH (DIS | SAINT LOUIS, MO | The Central Trust Bank |
| $150,000–350,000 | NATIONAL COUNCIL OF JEWISH WOMEN, ST. LOUIS SECTION | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $1–2 million | NATIONAL DESIGN BUILD SERVICES LLC | SAINT LOUIS, MO | Busey Bank |
| $1–2 million | NATIONAL HOSPICE MANAGEMENT INC | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | NATIONAL MUSEUM OF TRANSPORTATION | SAINT LOUIS, MO | First Bank |
| $150,000–350,000 | NATIONAL RARITIES, LLC | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | NATIONAL REAL ESTATE MANAGEMENT CORPORATION | SAINT LOUIS, MO | The Central Trust Bank |
| $350,000–1 million | NATIONAL SALES COMPANY | SAINT LOUIS, MO | Busey Bank |