| $350,000–1 million | ROAK BREWING CO., LLC | Royal Oak, MI | Mercantile Bank |
| $150,000–350,000 | ROBERT F. MURRAY & COMPANY CPAS | MOUNT PLEASANT, MI | Mercantile Bank |
| $350,000–1 million | ROBERTS DAIRY SERVICE INC. | Saint Johns, MI | Mercantile Bank |
| $5–10 million | ROCKFORD CONSTRUCTION CO | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | ROGERS HALE ENTERPRISES INC | HALE, MI | Mercantile Bank |
| $150,000–350,000 | ROGERS IGA INC | GLENNIE, MI | Mercantile Bank |
| $350,000–1 million | ROSE'S BUILDING COMPANY LIMITED | GRAND RAPIDS, MI | Mercantile Bank |
| $350,000–1 million | ROSE'S BUILDING COMPANY LTD PARTNERSHIP | Grand Rapids, MI | Mercantile Bank |
| $1–2 million | ROWERDINK INC. | GRAND RAPIDS, MI | Mercantile Bank |
| $350,000–1 million | RTL DEVELOPMENT COMPANY LLC | Detroit, MI | Mercantile Bank |
| $350,000–1 million | RTL DEVELOPMENT COMPANY LLC | DETROIT, MI | Mercantile Bank |
| $1–2 million | S. F. GILMORE INC. | Grand Rapids, MI | Mercantile Bank |
| $1–2 million | S.A. MORMAN & COMPANY | WYOMING, MI | Mercantile Bank |
| $1–2 million | S.F. GILMORE INC | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | SAB MOVING L.L.C. | Jackson, MI | Mercantile Bank |
| $150,000–350,000 | SAB MOVING L.L.C. | JACKSON, MI | Mercantile Bank |
| $150,000–350,000 | SAFE HAVEN MINISTRIES, INC. | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | SAGINAW HOSPITALITY LLC | Saginaw, MI | Mercantile Bank |
| $350,000–1 million | SAINT JOHNS FORD MECURY SALES, INC | SAINT JOHNS, MI | Mercantile Bank |
| $1–2 million | SAME DAY DELIVERY INC. | Grand Rapids, MI | Mercantile Bank |
| $1–2 million | SAME DAY DELIVERY, INC. | GRAND RAPIDS, MI | Mercantile Bank |
| $350,000–1 million | SAVANT AUTOMATION INC | Grand Rapids, MI | Mercantile Bank |
| $350,000–1 million | SAVANT AUTOMATION, INC. | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | SCARLETT INC | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | SCARLETT INC. | Grand Rapids, MI | Mercantile Bank |
| $150,000–350,000 | SCHENK & BONCHER PC | GRAND RAPIDS, MI | Mercantile Bank |
| $1–2 million | SCHNEIDER TIRE OUTLET, INC. | MARNE, MI | Mercantile Bank |
| $150,000–350,000 | SCHUIL COFFEE COMPANY, LLC | GRAND RAPIDS, MI | Mercantile Bank |
| $350,000–1 million | SCHULER BOOKS INC. | Grand Rapids, MI | Mercantile Bank |
| $350,000–1 million | SCHULER BOOKS, INC. | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | SCOTLAND OIL CO. INC. | Alma, MI | Mercantile Bank |
| $150,000–350,000 | SCOTLAND OIL CO. INC. | ALMA, MI | Mercantile Bank |
| $150,000–350,000 | SCOTLAND TRANSPORTATION LLC | Alma, MI | Mercantile Bank |
| $150,000–350,000 | SCOTLAND TRANSPORTATION, LLC | ALMA, MI | Mercantile Bank |
| $350,000–1 million | SEALS, TACIA AND BARTZ, O.D., P.C. | Alma, MI | Mercantile Bank |
| $350,000–1 million | SEALS, TACIA AND BARTZ, O.D., P.C. | ALMA, MI | Mercantile Bank |
| $350,000–1 million | SECURALARM LLC | Grand Rapids, MI | Mercantile Bank |
| $350,000–1 million | SECURALARM, LLC | WYOMING, MI | Mercantile Bank |
| $150,000–350,000 | SELECT PRODUCTS LIMITED | KALAMAZOO, MI | Mercantile Bank |
| $350,000–1 million | SENIOR NEIGHBORS INCORPORATED | Grand Rapids, MI | Mercantile Bank |
| $350,000–1 million | SENIOR NEIGHBORS, INC | GRAND RAPIDS, MI | Mercantile Bank |
| $350,000–1 million | SHAFER REDI-MIX, INC. | ALBION, MI | Mercantile Bank |
| $150,000–350,000 | SHOW MICHIGAN CORPORATION | Grand Rapids, MI | Mercantile Bank |
| $150,000–350,000 | SIGMA INTERNATIONAL | LIVONIA, MI | Mercantile Bank |
| $350,000–1 million | SIGMA INTERNATIONAL INC | Livonia, MI | Mercantile Bank |
| $350,000–1 million | SIGNCOMP LLC | Grand Rapids, MI | Mercantile Bank |
| $350,000–1 million | SIGNCOMP LLC | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | SILICONATURE CORPORATION | CALEDONIA, MI | Mercantile Bank |
| $150,000–350,000 | SILL FARMS MARKET, INC | LAWRENCE, MI | Mercantile Bank |
| $150,000–350,000 | SILVERSMITH INC | GAYLORD, MI | Mercantile Bank |
| $150,000–350,000 | SILVERSMITH INC. | Gaylord, MI | Mercantile Bank |
| $1–2 million | SIZZLIN 5 INC. | Grand Rapids, MI | Mercantile Bank |
| $1–2 million | SIZZLIN 5, INC. | GRAND RAPIDS, MI | Mercantile Bank |
| $350,000–1 million | SJA SOLUTIONS | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | SKYLINE EXHIBITS WEST MICHIGAN LLC | Kentwood, MI | Mercantile Bank |
| $150,000–350,000 | SKYLINE EXHIBITS WEST MICHIGAN LLC | GRAND RAPIDS, MI | Mercantile Bank |
| $350,000–1 million | SOBIE COMPANY INC. | Caledonia, MI | Mercantile Bank |
| $350,000–1 million | SOBIE COMPANY, INC. | CALEDONIA, MI | Mercantile Bank |
| $1–2 million | SOLAIRE MEDICAL STORAGE LLC | Marne, MI | Mercantile Bank |
| $1–2 million | SOLAIRE MEDICAL STORAGE, LLC | MARNE, MI | Mercantile Bank |
| $350,000–1 million | SPEC TOOL COMPANY INC | Sparta, MI | Mercantile Bank |
| $1–2 million | SPEC TOOL COMPANY, INC. | SPARTA, MI | Mercantile Bank |
| $350,000–1 million | SPECIAL OLYMPICS MICHIGAN INC. | Mt Pleasant, MI | Mercantile Bank |
| $350,000–1 million | SPECIAL OLYMPICS MICHIGAN, INC. | MOUNT PLEASANT, MI | Mercantile Bank |
| $150,000–350,000 | SPECIALTY MACHINE SERVICE INC | GRAND RAPIDS, MI | Mercantile Bank |
| $1–2 million | SPECIALTY TOOLING SYSTEMS | GRAND RAPIDS, MI | Mercantile Bank |
| $350,000–1 million | SPENCER PLASTICS INC. | Cadillac, MI | Mercantile Bank |
| $350,000–1 million | SPENCER PLASTICS, INC. | CADILLAC, MI | Mercantile Bank |
| $150,000–350,000 | SPORTS ADDIX LLC | Lowell, MI | Mercantile Bank |
| $150,000–350,000 | SPORTS ADDIX LLC | LOWELL, MI | Mercantile Bank |
| $2–5 million | SPRINTER SERVICES, INC | GRANDVILLE, MI | Mercantile Bank |
| $150,000–350,000 | STANDARD LIFTERS INC. | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | START GARDEN INC | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | START GARDEN INC. | Grand Rapids, MI | Mercantile Bank |
| $1–2 million | STEEL CRAFT TECHNOLOGIES | BELMONT, MI | Mercantile Bank |
| $1–2 million | STEEL CRAFT TECHNOLOGIES INC. | Belmont, MI | Mercantile Bank |
| $1–2 million | STENGER & STENGER, P.C. | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | STERLING EXCAVATION INC. | West Branch, MI | Mercantile Bank |
| $150,000–350,000 | STERLING EXCAVATION, INC. | WEST BRANCH, MI | Mercantile Bank |
| $150,000–350,000 | STONECASTLE DENTISTRY PLLC | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | STREEK'S GREENHOUSE INC | KALAMAZOO, MI | Mercantile Bank |
| $350,000–1 million | STUART MECHANICAL LLC | Auburn Hills, MI | Mercantile Bank |
| $350,000–1 million | STUART MECHANICAL LLC | AUBURN HILLS, MI | Mercantile Bank |
| $150,000–350,000 | SUGAR FREE SPECIALTIES | COMSTOCK PARK, MI | Mercantile Bank |
| $150,000–350,000 | SUGAR FREE SPECIALTIES LLC | Comstock Park, MI | Mercantile Bank |
| $1–2 million | SUMMIT CONTRACTORS INC AND TVT | HASLETT, MI | Mercantile Bank |
| $350,000–1 million | SUNCOAST TAMPA BAY BLOCK AND READY MIX CO., INC. | TAMPA, FL | Mercantile Bank |
| $150,000–350,000 | SUPERIOR PRECAST PRODUCTS, INC | KALAMAZOO, MI | Mercantile Bank |
| $1–2 million | SUPPLY CHAIN SHIPPING LLC | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | SWARTZ ELECTRIC CO | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | TAILGATERS LLC | LANSING, MI | Mercantile Bank |
| $1–2 million | TALL BROWN DOG, LLC | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | TANNEWITZ INC. | Jenison, MI | Mercantile Bank |
| $350,000–1 million | TANNEWITZ, INC. | JENISON, MI | Mercantile Bank |
| $150,000–350,000 | TBBR INC. | East Tawas, MI | Mercantile Bank |
| $150,000–350,000 | TBBR, INC. | EAST TAWAS, MI | Mercantile Bank |
| $350,000–1 million | TEAM HODGES, INC | WEST BRANCH, MI | Mercantile Bank |
| $150,000–350,000 | TEAM RESTORATION INC | BELMONT, MI | Mercantile Bank |
| $150,000–350,000 | TEAM RESTORATION INC. | Belmont, MI | Mercantile Bank |
| $150,000–350,000 | TECHNICAL PACKAGING SYSTEMS, INC. | KALAMAZOO, MI | Mercantile Bank |