| $350,000–1 million | JACK DYKSTRA EXCAVATING INC | GRAND RAPIDS, MI | Mercantile Bank |
| $350,000–1 million | JACK DYKSTRA EXCAVATING INC. | Grand Rapids, MI | Mercantile Bank |
| $150,000–350,000 | JAY TRUCKS AND ASSOCIATES, PC | CLARE, MI | Mercantile Bank |
| $1–2 million | JAY'S OUTDOORS LLC | CLARE, MI | Mercantile Bank |
| $150,000–350,000 | JB REAL ESTATE DEVELOPMENT LLC | Grand Rapids, MI | Mercantile Bank |
| $150,000–350,000 | JB REAL ESTATE DEVELOPMENT LLC | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | JC ELECTIC LLC | Saint Johns, MI | Mercantile Bank |
| $150,000–350,000 | JCC HOSPITALITY, LLC | OKEMOS, MI | Mercantile Bank |
| $150,000–350,000 | JIM LEACH LLC | Grand Rapids, MI | Mercantile Bank |
| $150,000–350,000 | JIM LEACH LLC | GRAND RAPIDS, MI | Mercantile Bank |
| $1–2 million | JIREH METAL PRODUCTS, INC. | Grandville, MI | Mercantile Bank |
| $150,000–350,000 | JOHNSON & WYNGAARDEN | OKEMOS, MI | Mercantile Bank |
| $150,000–350,000 | JOHNSON & WYNGAARDEN P.C. | Okemos, MI | Mercantile Bank |
| $150,000–350,000 | JOSEPH R YACISEN DO PC | ALMA, MI | Mercantile Bank |
| $150,000–350,000 | JULIE R. VANHOOSE D.M.D. AND KYLE GIES D.D.S. P.C. | Grand Rapids, MI | Mercantile Bank |
| $150,000–350,000 | JULIE R. VANHOOSE, D.M.D. AND KYLE GIES, D.D.S., P.C. | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | JW RABIDEAU INC. | Grand Rapids, MI | Mercantile Bank |
| $150,000–350,000 | JW RABIDEAU, INC. | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | K & E HOTELS LLC | Grand Rapids, MI | Mercantile Bank |
| $150,000–350,000 | K & E HOTELS LLC | GRAND RAPIDS, MI | Mercantile Bank |
| $350,000–1 million | K & J CONTRACTORS LLC | Fenton, MI | Mercantile Bank |
| $350,000–1 million | K&J CONTRACTORS LLC | HOLLY, MI | Mercantile Bank |
| $2–5 million | K.J. STEDMAC, LLC | GRAND RAPIDS, MI | Mercantile Bank |
| $350,000–1 million | K5 RESTAURANTS LLC | Grand Rapids, MI | Mercantile Bank |
| $150,000–350,000 | K5 RESTAURANTS LLC | GRAND RAPIDS, MI | Mercantile Bank |
| $350,000–1 million | KABB MANAGEMENT INC | LOWELL, MI | Mercantile Bank |
| $350,000–1 million | KAL KLEEN INC | KALAMAZOO, MI | Mercantile Bank |
| $150,000–350,000 | KAL-BLUE INC | Kalamazoo, MI | Mercantile Bank |
| $150,000–350,000 | KALAMAZOO MECHANICAL, INC | KALAMAZOO, MI | Mercantile Bank |
| $150,000–350,000 | KALBLUE, INC | KALAMAZOO, MI | Mercantile Bank |
| $350,000–1 million | KALPLAS INC | VICKSBURG, MI | Mercantile Bank |
| $350,000–1 million | KALPLAS INC. | Vicksburg, MI | Mercantile Bank |
| $150,000–350,000 | KASSOUNI MANUFACTURING INC. | Belding, MI | Mercantile Bank |
| $350,000–1 million | KATERBERG VERHAGE, INC. | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | KELLEY CAWTHORNE, LLC | LANSING, MI | Mercantile Bank |
| $150,000–350,000 | KEN'S AUTO CARE EXPERTS INC | WYOMING, MI | Mercantile Bank |
| $2–5 million | KENT QUALITY FOODS | HUDSONVILLE, MI | Mercantile Bank |
| $150,000–350,000 | KERWIN ELECTRIC INC. | Kalamazoo, MI | Mercantile Bank |
| $150,000–350,000 | KERWIN ELECTRIC, INC | KALAMAZOO, MI | Mercantile Bank |
| $350,000–1 million | KEYSTONE MANUFACTURING LLC | Kalamazoo, MI | Mercantile Bank |
| $350,000–1 million | KIDS FOOD BASKET | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | KIMBOW INCORPORATED | COMSTOCK PARK, MI | Mercantile Bank |
| $150,000–350,000 | KIPPER TRUCKING INC | LAKE CITY, MI | Mercantile Bank |
| $150,000–350,000 | KIRCHHOFF ENTERPRISES, INC. | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | KISS TECHNOLOGIES INCORPORATED | Holland, MI | Mercantile Bank |
| $150,000–350,000 | KITCHEN 67 LLC | Grand Rapids, MI | Mercantile Bank |
| $350,000–1 million | KLEYN ELECTRIC INC. | Grand Rapids, MI | Mercantile Bank |
| $350,000–1 million | KLEYN ELECTRIC, INC. | GRAND RAPIDS, MI | Mercantile Bank |
| $5–10 million | KMG PRESTIGE, INC. | MOUNT PLEASANT, MI | Mercantile Bank |
| $150,000–350,000 | KNYSZ MANAGEMENT LIMITED LIABILITY COMPANY | BLOOMFIELD HILLS, MI | Mercantile Bank |
| $350,000–1 million | KOENES AUTO BODY INC | GRAND RAPIDS, MI | Mercantile Bank |
| $350,000–1 million | KOENES AUTO BODY INC | Grand Rapids, MI | Mercantile Bank |
| $150,000–350,000 | KOENIGSKNECHT DENTISTRY PLLC | SAINT JOHNS, MI | Mercantile Bank |
| $150,000–350,000 | KOENIGSKNECHT DENTISTRY PLLC | Saint Johns, MI | Mercantile Bank |
| $150,000–350,000 | KONWINSKI CONSTRUCTION INC | MOUNT PLEASANT, MI | Mercantile Bank |
| $350,000–1 million | KRUPP INDUSTRIES LLC | Grand Rapids, MI | Mercantile Bank |
| $350,000–1 million | KRUPP INDUSTRIES, LLC | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | KURNCZ FARMS, INC | SAINT JOHNS, MI | Mercantile Bank |
| $150,000–350,000 | KWM ACQUISITION, LLC | BYRON CENTER, MI | Mercantile Bank |
| $1–2 million | L&D ELECTRIC INC. | Lansing, MI | Mercantile Bank |
| $1–2 million | L&D ELECTRIC, INC. | LANSING, MI | Mercantile Bank |
| $350,000–1 million | L.D. CLARK COMPANY | LANSING, MI | Mercantile Bank |
| $150,000–350,000 | LAKE LANSING ROAD ANIMAL CLINIC INC | LANSING, MI | Mercantile Bank |
| $150,000–350,000 | LAKE MICHIGAN DENTAL P.C. | Grand Rapids, MI | Mercantile Bank |
| $150,000–350,000 | LAKE MICHIGAN DENTAL, PC | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | LAKEVIEW HEALTH CENTER P.C. | ROCKFORD, MI | Mercantile Bank |
| $1–2 million | LAMBERT & CO. | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | LANCO ACQUISITION LLC | Sparta, MI | Mercantile Bank |
| $150,000–350,000 | LANCO ACQUISITION, LLC | SPARTA, MI | Mercantile Bank |
| $150,000–350,000 | LANGERAK ROOF SYSTEMS INC | Hudsonville, MI | Mercantile Bank |
| $150,000–350,000 | LANGERAK ROOF SYSTEMS, INC. | HUDSONVILLE, MI | Mercantile Bank |
| $2–5 million | LANSING OPHTHALMOLOGY | EAST LANSING, MI | Mercantile Bank |
| $2–5 million | LANSING OPHTHAMOLOGY P.C. | East Lansing, MI | Mercantile Bank |
| $350,000–1 million | LANSING SANITARY SUPPLY, INC | LANSING, MI | Mercantile Bank |
| $150,000–350,000 | LEACH FOOD EQUIPMENT DISTRIBUTORS, LLC | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | LEAD MARKETING AGENCY INC. | Grand Rapids, MI | Mercantile Bank |
| $150,000–350,000 | LEAD MARKETING AGENCY, INC. | GRAND RAPIDS, MI | Mercantile Bank |
| $350,000–1 million | LECTRONIX, INC. | LANSING, MI | Mercantile Bank |
| $350,000–1 million | LEELIN HOME HEALTH CARE, INC. | WEST BRANCH, MI | Mercantile Bank |
| $350,000–1 million | LEGAL COPY SERVICES, INC. | GRAND RAPIDS, MI | Mercantile Bank |
| $350,000–1 million | LEGEND MANUFACTURING, INC. | ALMA, MI | Mercantile Bank |
| $150,000–350,000 | LEIGHTRONIX INCORPORATED | Mason, MI | Mercantile Bank |
| $150,000–350,000 | LEIGHTRONIX INCORPORATED | EAST LANSING, MI | Mercantile Bank |
| $2–5 million | LIFECARE, INC | KALAMAZOO, MI | Mercantile Bank |
| $1–2 million | LIFECIRCLES | NORTON SHORES, MI | Mercantile Bank |
| $1–2 million | LIGHT CORP INC. | GRAND HAVEN, MI | Mercantile Bank |
| $1–2 million | LIGHT CORP INC. | Grand Haven, MI | Mercantile Bank |
| $150,000–350,000 | LIGHTNING LITHO INC | LANSING, MI | Mercantile Bank |
| $150,000–350,000 | LINCOLN NURSERIES, INC. | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | LJ TRUMBLE BUILDERS LLC | Lansing, MI | Mercantile Bank |
| $150,000–350,000 | LJ TRUMBLE BUILDERS, LLC | LANSING, MI | Mercantile Bank |
| $150,000–350,000 | LLSH LLC | Grand Rapids, MI | Mercantile Bank |
| $150,000–350,000 | LLSH, LLC | GRAND RAPIDS, MI | Mercantile Bank |
| $150,000–350,000 | LMG I INC. | Williamston, MI | Mercantile Bank |
| $150,000–350,000 | LMG I, INC | WILLIAMSTON, MI | Mercantile Bank |
| $350,000–1 million | LOEKS THEATRES, INC. | GRAND RAPIDS, MI | Mercantile Bank |
| $350,000–1 million | LUBE-POWER INC | Shelby Township, MI | Mercantile Bank |
| $150,000–350,000 | M&P AND D&A INC | CLARKSTON, MI | Mercantile Bank |
| $350,000–1 million | M-37 CONCRETE PRODUCTS, INC. | SPRING LAKE, MI | Mercantile Bank |
| $2–5 million | M. C. VAN KAMPEN TRUCKING, INC. | GRAND RAPIDS, MI | Mercantile Bank |