| $350,000–1 million | RE-POLY, LLC | SAINT LOUIS, MO | CIBC Bank USA |
| $150,000–350,000 | REALTY LAW PARTNERS PC | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $350,000–1 million | REASOURCE LLC | SAINT LOUIS, MO | U.S. Bank, National Association |
| $150,000–350,000 | RED BIRD PRE-MIX CO. | SAINT LOUIS, MO | Busey Bank |
| $350,000–1 million | RED BIRD READY-MIX CO. | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | RED EYE INC. | SAINT LOUIS, MO | Triad Bank |
| $350,000–1 million | REDBIRD CARRIERS | SAINT LOUIS, MO | Great Southern Bank |
| $150,000–350,000 | REDWOOD VENTURES LLC | SAINT LOUIS, MO | Bank of America, National Association |
| $350,000–1 million | REED RUBBER PRODUCTS | SAINT LOUIS, MO | Carrollton Bank |
| $350,000–1 million | REGENCY ENTERPRISES SERVICES, LLC | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | REGENCY GLOBAL SOLUTIONS, LLC | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $350,000–1 million | REHABILIATION PROFESSIONALS, INC. | SAINT LOUIS, MO | Midwest Regional Bank |
| $150,000–350,000 | REHNQUIST DESIGN AND BUILD, INC. | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | REID'S PASTRY & CHOCOLATE LLC | SAINT LOUIS, MO | Carrollton Bank |
| $5–10 million | REINHOLD ELECTRIC INC | SAINT LOUIS, MO | Central Bank of St. Louis |
| $150,000–350,000 | REINHOLD FLOORING INC. | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | REINKER, HAMILTON & FENLEY LLC | SAINT LOUIS, MO | UMB Bank, National Association |
| $150,000–350,000 | REMAINS, INC. | SAINT LOUIS, MO | INB, National Association |
| $150,000–350,000 | REMIGER DESIGN INC | SAINT LOUIS, MO | Cass Commercial Bank |
| $1–2 million | RENAISSANCE FINANCIAL CORPORATION | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | REPUBLIC ROOFING CO INC | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | RESPONSIBLE CONTAINER, LLC | SAINT LOUIS, MO | Royal Banks of Missouri |
| $150,000–350,000 | RESPONSIVE RESPIRATORY, INC. | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | RESTORATION ST. LOUIS, INC. | SAINT LOUIS, MO | The Bank of Houston |
| $150,000–350,000 | RETAINING WALL SOLUTIONS INC. | SAINT LOUIS, MO | Montgomery Bank |
| $1–2 million | RETINA CONSULTANTS LTD | SAINT LOUIS, MO | Lindell Bank & Trust Company |
| $150,000–350,000 | REVITALIFE WELLNESS CENTER, LLC | SAINT LOUIS, MO | Carrollton Bank |
| $350,000–1 million | REX INDUSTRIAL CORP | SAINT LOUIS, MO | Bank of America, National Association |
| $350,000–1 million | RHEIN MANUFACTURING INC | SAINT LOUIS, MO | Bank of America, National Association |
| $1–2 million | RHODEY CONSTRUCTION, INC | SAINT LOUIS, MO | Newtek Small Business Finance, Inc. |
| $350,000–1 million | RHYMES CORPORATION | SAINT LOUIS, MO | United Bank of Union |
| $350,000–1 million | RICE PAINTING CO INC | SAINT LOUIS, MO | PNC Bank, National Association |
| $150,000–350,000 | RICHARD J. NISSEN, DDS, MS, P.C. | SAINT LOUIS, MO | Community State Bank of Missouri |
| $150,000–350,000 | RICHMAN HOLDINGS, LLC | SAINT LOUIS, MO | Bank of Springfield |
| $150,000–350,000 | RIDENOUR PLASTIC SURGERY LLC | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | RIGAZZI'S, INC. | SAINT LOUIS, MO | BMO Harris Bank National Association |
| $150,000–350,000 | RISE COMMUNITY DEVELOPMENT | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | RISING ABOVE LLC | SAINT LOUIS, MO | Carrollton Bank |
| $350,000–1 million | RISK CONSULTING PARTNERS, LLC | SAINT LOUIS, MO | Montgomery Bank |
| $150,000–350,000 | RIVER-ROADS DISTRIBUTING COMPANY | SAINT LOUIS, MO | UMB Bank, National Association |
| $150,000–350,000 | RIVERSIDE SALVAGE, INC | SAINT LOUIS, MO | Bank of Hillsboro, National Association |
| $150,000–350,000 | RIZZOS S COUNTY RESTAURANT INC | SAINT LOUIS, MO | PNC Bank, National Association |
| $150,000–350,000 | RJ HOSPITALITY | SAINT LOUIS, MO | Central Bank of St. Louis |
| $150,000–350,000 | RJF CORPORATION | SAINT LOUIS, MO | Triad Bank |
| $150,000–350,000 | ROADSIDE TRAILER SERVICE INC. | SAINT LOUIS, MO | First Federal Savings & Loan Association of Central Illinois, S.B. |
| $150,000–350,000 | ROANOKE CONSTRUCTION INC | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | ROBERT A. CROWE P.C. | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $350,000–1 million | ROBERT LEE | SAINT LOUIS, MO | PNC Bank, National Association |
| $150,000–350,000 | ROBERT PISKULICH & ASSOCIATES INC. | SAINT LOUIS, MO | Great Southern Bank |
| $150,000–350,000 | ROBERTS LOADING DOCK EQUIPMENT CO INC | SAINT LOUIS, MO | Regions Bank |
| $350,000–1 million | ROBERTS PERRYMAN PC | SAINT LOUIS, MO | Commerce Bank |
| $150,000–350,000 | ROD'S SERVICES, INC. | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | ROESER CONSTRUCTION COMPANY | SAINT LOUIS, MO | Carrollton Bank |
| $150,000–350,000 | ROGER KEPNER, INC. | SAINT LOUIS, MO | Montgomery Bank |
| $350,000–1 million | ROHA USA LLC | SAINT LOUIS, MO | CIBC Bank USA |
| $150,000–350,000 | ROHAN WOODS SCHOOL | SAINT LOUIS, MO | Midland States Bank |
| $350,000–1 million | ROI SEARCH PARTNERS, LLC | SAINT LOUIS, MO | Triad Bank |
| $1–2 million | ROMA GROCERY CO. | SAINT LOUIS, MO | Peoples National Bank, National Association |
| $150,000–350,000 | RONALD MCDONALD HOUSE CHARITIES OF ST. LOUIS | SAINT LOUIS, MO | Triad Bank |
| $350,000–1 million | RONZIO-LEMAY CORP | SAINT LOUIS, MO | Triad Bank |
| $1–2 million | ROOFERS MART, INC. | SAINT LOUIS, MO | First Bank |
| $350,000–1 million | ROOSTER AND THE HEN LLC | SAINT LOUIS, MO | Commerce Bank |
| $350,000–1 million | ROSALITA'S CANTINA DES PERES, LLC | SAINT LOUIS, MO | American Bank of Missouri |
| $150,000–350,000 | ROSALITAS CANTINA MANAGEMENT GROUP, LLC | SAINT LOUIS, MO | American Bank of Missouri |
| $350,000–1 million | ROSENBLUM GOLDENHERSH, P.C. | SAINT LOUIS, MO | Central Bank of St. Louis |
| $350,000–1 million | ROTHMAN FURNITURE STORES INC | SAINT LOUIS, MO | West Community CU |
| $150,000–350,000 | ROTHSCHILD MANAGEMENT LLC | SAINT LOUIS, MO | Midwest Regional Bank |
| $150,000–350,000 | ROTOLITE OF ST LOUIS INC | SAINT LOUIS, MO | Carrollton Bank |
| $150,000–350,000 | ROTON PRODUCTS, INC | SAINT LOUIS, MO | Busey Bank |
| $2–5 million | ROTTLER PEST CONTROL COMPANY | SAINT LOUIS, MO | Alliance CU |
| $350,000–1 million | ROUTE 66 HOSPITALITY LLC | SAINT LOUIS, MO | The Bank of Houston |
| $150,000–350,000 | ROY E. SCHMIDT, INC. | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | ROY WILLIAMS ENTERPRISE | SAINT LOUIS, MO | Midwest BankCentre |
| $1–2 million | ROYAL PAPERS, INC. | SAINT LOUIS, MO | Central Bank of St. Louis |
| $350,000–1 million | ROYAL VENDORS, INC. | SAINT LOUIS, MO | Citizens Bank |
| $150,000–350,000 | RP GROUP, INC. | SAINT LOUIS, MO | First Bank of the Lake |
| $150,000–350,000 | RRAH VETS I, LLC | SAINT LOUIS, MO | Central Bank of St. Louis |
| $150,000–350,000 | RT JONES FS LADNER & ASSOCIATES INC | SAINT LOUIS, MO | First Bank |
| $150,000–350,000 | RTBMO: LLC | SAINT LOUIS, MO | Bank of Washington |
| $150,000–350,000 | RUMPLEMAN, LLC | SAINT LOUIS, MO | American Bank of Missouri |
| $350,000–1 million | RUNGE PAINTING COMPANY, INC. | SAINT LOUIS, MO | FortuneBank |
| $150,000–350,000 | RUSSO STONE AND TILE DESIGN, LLC | SAINT LOUIS, MO | Peoples National Bank, National Association |
| $350,000–1 million | RYNEARSON, SUESS, SCHNURBUSCH & CHAMPION, L.L.C. | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | S & M BAR & GRILL LLC | SAINT LOUIS, MO | Bank of America, National Association |
| $2–5 million | S.M. WILSON & CO. | SAINT LOUIS, MO | Newtek Small Business Finance, Inc. |
| $150,000–350,000 | SACRED HEART VILLA | SAINT LOUIS, MO | BMO Harris Bank National Association |
| $1–2 million | SAGE LABS INC | SAINT LOUIS, MO | Cross River Bank |
| $350,000–1 million | SAINT LOUIS COUNSELING, INC. | SAINT LOUIS, MO | FortuneBank |
| $2–5 million | SAINT LOUIS SYMPHONY ORCHESTRA | SAINT LOUIS, MO | Commerce Bank |
| $350,000–1 million | SAINT PETER CATHOLIC CHURCH | SAINT LOUIS, MO | St. Louis Bank |
| $150,000–350,000 | SALEM IN LADUE UNITED METHODIST CHURCH | SAINT LOUIS, MO | Cass Commercial Bank |
| $150,000–350,000 | SALEM LUTHERAN CHURCH | SAINT LOUIS, MO | Midwest BankCentre |
| $150,000–350,000 | SALES RESOURCE INC. | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $150,000–350,000 | SALUTARE FOODS, LLC | SAINT LOUIS, MO | First National Bank of Waterloo |
| $5–10 million | SANDBERG PHOENIX & VON GONTARD, P.C. | SAINT LOUIS, MO | St. Louis Bank |
| $2–5 million | SANSONE GROUP LLC | SAINT LOUIS, MO | Royal Banks of Missouri |
| $1–2 million | SAPPER CONSULTING LLC | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $350,000–1 million | SAUL MIROWITZ JEWISH COMMUNITY SCHOOL | SAINT LOUIS, MO | Enterprise Bank & Trust |
| $350,000–1 million | SAVANNAH, LLC | SAINT LOUIS, MO | Simmons Bank |
| $150,000–350,000 | SAXONY CAPITAL MANAGEMENT, LLC | SAINT LOUIS, MO | MRV Banks |