| $1–2 million | JMN TRANSPORTATION INC. | MARYLAND HEIGHTS, MO | Busey Bank |
| $350,000–1 million | JOHANSEN & ANDERSON, INC. | JOLIET, IL | Busey Bank |
| $2–5 million | JOHN HENRY FOSTER COMPANY OF ST LOUIS INC | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | JOHN J. MATSOCK & ASSOCIATES, INC. | NAPERVILLE, IL | Busey Bank |
| $350,000–1 million | JOHN RUSS AND COMPANY, INC. | LOCKPORT, IL | Busey Bank |
| $150,000–350,000 | JOJO DELIVERY SERVICES, INC | LEHIGH ACRES, FL | Busey Bank |
| $350,000–1 million | JORIE HEALTHCARE PARTNERS LLC | OAK BROOK, IL | Busey Bank |
| $150,000–350,000 | JOSEPHS VENTURES LLC | FORT MYERS, FL | Busey Bank |
| $150,000–350,000 | JOSH NICHOLS ENTERPRISES, INC. | SAINT LOUIS, MO | Busey Bank |
| $350,000–1 million | JPAM CONSULTING, INC | SAINT LOUIS, MO | Busey Bank |
| $350,000–1 million | JPAM MGMT & CONSULTING, INC. | SAINT LOUIS, MO | Busey Bank |
| $350,000–1 million | JRG 4, INC. | JOLIET, IL | Busey Bank |
| $350,000–1 million | JSM MANAGEMENT, INC. | CHAMPAIGN, IL | Busey Bank |
| $1–2 million | JTEC INDUSTRIES INC | EAST PEORIA, IL | Busey Bank |
| $150,000–350,000 | K & M LOGISTIC INC | LANSING, MI | Busey Bank |
| $350,000–1 million | K&D ENTERPRISE LANDSCAPE MANAGEMENT, INC | ROCKDALE, IL | Busey Bank |
| $350,000–1 million | K-RISE SYSTEMS INCORPORATED | AURORA, IL | Busey Bank |
| $350,000–1 million | K. HALL STUDIO LLC | SAINT LOUIS, MO | Busey Bank |
| $350,000–1 million | KAGAN, JUGAN & ASSOCIATES, P.A | FORT MYERS, FL | Busey Bank |
| $2–5 million | KANN ENERPRISES INC | SHOREWOOD, IL | Busey Bank |
| $150,000–350,000 | KEEFE, KEEFE, AND UNSELL PC | BELLEVILLE, IL | Busey Bank |
| $5–10 million | KELLY MITCHELL GROUP, INC. | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | KERI POWELL THERAPY, INC. | SAVOY, IL | Busey Bank |
| $150,000–350,000 | KESTER DRUGS, INC. | NAPERVILLE, IL | Busey Bank |
| $150,000–350,000 | KEVIN L. SHELTON, DDS, P.C. | SHILOH, IL | Busey Bank |
| $150,000–350,000 | KIDS CAN DO, INC. | MOKENA, IL | Busey Bank |
| $150,000–350,000 | KIN-KO ACE STORES, INC | DOWNERS GROVE, IL | Busey Bank |
| $1–2 million | KING-LAR COMPANY | DECATUR, IL | Busey Bank |
| $350,000–1 million | KNAPP CONCRETE CONTRACTORS, INC. | GOODFIELD, IL | Busey Bank |
| $150,000–350,000 | KNAUER INDUSTRIES, LTD. | SHOREWOOD, IL | Busey Bank |
| $350,000–1 million | KOENER ELECTRIC INC | PEORIA, IL | Busey Bank |
| $150,000–350,000 | KOENIG BODY & EQUIPMENT, INC. | PEORIA, IL | Busey Bank |
| $350,000–1 million | KOHNER PROPERTIES, INCORPORATED | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | KONGSKILDE INDUSTRIES USA INC | NORMAL, IL | Busey Bank |
| $1–2 million | KOREIN TILLERY, LLC | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | KOSHINSKI ASSET MANAGEMENT, INC | DECATUR, IL | Busey Bank |
| $1–2 million | KR & G EXCAVATING PARTNERS LLC | OSWEGO, IL | Busey Bank |
| $150,000–350,000 | KRAMER FURNITURE AND CABINET MAKERS, INC | EDINBURGH, IN | Busey Bank |
| $150,000–350,000 | KRAUS, INC. | FORSYTH, IL | Busey Bank |
| $150,000–350,000 | KRUCKEBERG OPS LLC | MORO, IL | Busey Bank |
| $350,000–1 million | KRYKEN INTERNATIONAL, INC. | LA GRANGE, IL | Busey Bank |
| $150,000–350,000 | L. CLAUDE ASCHINBERG, LTD | JOLIET, IL | Busey Bank |
| $350,000–1 million | L.J. MORSE CONSTRUCTION CO. | AURORA, IL | Busey Bank |
| $350,000–1 million | L.U. TRANSPORT, INC. | CHICAGO, IL | Busey Bank |
| $150,000–350,000 | LABELS DIRECT, INC. | CHESTERFIELD, MO | Busey Bank |
| $350,000–1 million | LAKE SHORE OBSTETRICS AND GYNECOLOGY, LLC | CHICAGO, IL | Busey Bank |
| $350,000–1 million | LAKESIDE ROOFING COMPANY | COLLINSVILLE, IL | Busey Bank |
| $1–2 million | LANCELOT INC. | BRIDGEVIEW, IL | Busey Bank |
| $350,000–1 million | LAND ROVER HINSDALE, L.L.C. | HINSDALE, IL | Busey Bank |
| $350,000–1 million | LANRACORP, INC. | BROWNSTOWN, IL | Busey Bank |
| $1–2 million | LASER ELECTRIC INC. | PEORIA, IL | Busey Bank |
| $350,000–1 million | LAUREL HOTEL LANDLORD, LLC | SAINT LOUIS, MO | Busey Bank |
| $350,000–1 million | LAWRENCE FABRIC STRUCTURES, INC. | SAINT LOUIS, MO | Busey Bank |
| $350,000–1 million | LC MOLD INC | ROLLING MEADOWS, IL | Busey Bank |
| $150,000–350,000 | LDS INDUSTRIES LLC | ADDISON, IL | Busey Bank |
| $150,000–350,000 | LEADS CONSTRUCTION COMPANY, LLC | BURR RIDGE, IL | Busey Bank |
| $150,000–350,000 | LEGACY TITLE SERVICES, LLC | CHESTERFIELD, MO | Busey Bank |
| $350,000–1 million | LEO JR. LAWN AND IRRIGATION SERVICES, LLC | NAPLES, FL | Busey Bank |
| $350,000–1 million | LEON BANKIER FAMILY LP | CHAMPAIGN, IL | Busey Bank |
| $150,000–350,000 | LEROY EMERGENCY AMBULANCE SERVICE, INC | LE ROY, IL | Busey Bank |
| $350,000–1 million | LIGHTFIRE PARTNERS, LLC | EARTH CITY, MO | Busey Bank |
| $150,000–350,000 | LIGHTHOUSE ISLAND RESORT INC | FORT MYERS BEACH, FL | Busey Bank |
| $150,000–350,000 | LIMBAUGH CONSTRUCTION CO. INC. | GRANITE CITY, IL | Busey Bank |
| $150,000–350,000 | LION LOGISTICS, INC | BENSENVILLE, IL | Busey Bank |
| $1–2 million | LITANIA SPORTS GROUP, INC. | CHAMPAIGN, IL | Busey Bank |
| $2–5 million | LITTLE FRIENDS, INC. | NAPERVILLE, IL | Busey Bank |
| $350,000–1 million | LITTLE JEWELS LEARNING CENTER, INC. | BLOOMINGTON, IL | Busey Bank |
| $150,000–350,000 | LOCAL BACKHAUL NETWORKS LLC | CHESTERFIELD, MO | Busey Bank |
| $350,000–1 million | LOCKERDOME, INC. | SAINT LOUIS, MO | Busey Bank |
| $350,000–1 million | LOGIC SYSTEMS PRODUCTION LLC | VALLEY PARK, MO | Busey Bank |
| $150,000–350,000 | LSI COMPANIES INC. | FORT MYERS, FL | Busey Bank |
| $150,000–350,000 | LU PARTNERS, INC. | OAK FOREST, IL | Busey Bank |
| $150,000–350,000 | LUCKY NOODLES LLC | CHICAGO, IL | Busey Bank |
| $350,000–1 million | LUCKY'S ENERGY SERVICE,INC | HAMPSHIRE, IL | Busey Bank |
| $150,000–350,000 | LUTHERAN CENTRAL SCHOOL ASSOCIATION OF PEORIA, ILLINOIS, INC. | PEORIA, IL | Busey Bank |
| $350,000–1 million | LYNCH ALUMINUM MFG. CO., AN ILLINOIS CORPORATION | PEORIA, IL | Busey Bank |
| $350,000–1 million | M & J GENERAL CONTRACTORS LTD | ELGIN, IL | Busey Bank |
| $150,000–350,000 | M 2, LLC | BLOOMINGTON, IL | Busey Bank |
| $150,000–350,000 | M-CO, LLC | SAINT LOUIS, MO | Busey Bank |
| $350,000–1 million | M.A.C. MEDICAL INC. | BELLEVILLE, IL | Busey Bank |
| $150,000–350,000 | MACK & ASSOCIATES, CERTIFIED PUBLIC ACCOUNTANTS, P.C. | MORRIS, IL | Busey Bank |
| $150,000–350,000 | MACKAY & COMPANY, INC. | LOMBARD, IL | Busey Bank |
| $1–2 million | MAH MACHINE COMPANY | CICERO, IL | Busey Bank |
| $350,000–1 million | MAHONEY, SILVERMAN & CROSS, LLC | JOLIET, IL | Busey Bank |
| $150,000–350,000 | MAKSTEEL PROCESSING LLC | DEARBORN, MI | Busey Bank |
| $350,000–1 million | MAR LO SALES, INC. | IRVING, TX | Busey Bank |
| $150,000–350,000 | MARINE SERVICES CORP. | DOLTON, IL | Busey Bank |
| $150,000–350,000 | MARINO ENGINEERING ASSOCIATES, INC. | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | MARK A SCHEPERLE INC | SAINT LOUIS, MO | Busey Bank |
| $150,000–350,000 | MARKETING CONCEPTS GROUP, INC. | OAK BROOK, IL | Busey Bank |
| $150,000–350,000 | MARKETVIEW FINANCE CORPORATION | CHAMPAIGN, IL | Busey Bank |
| $1–2 million | MARTIN CEMENT CO. | ROMEOVILLE, IL | Busey Bank |
| $350,000–1 million | MARTIN GLASS COMPANY | BELLEVILLE, IL | Busey Bank |
| $350,000–1 million | MARTIN HOOD LLC | CHAMPAIGN, IL | Busey Bank |
| $1–2 million | MARTIN JETCO HEATING AND AIR CONDITIONING | FENTON, MO | Busey Bank |
| $150,000–350,000 | MARTIN JETCO, INC | FENTON, MO | Busey Bank |
| $350,000–1 million | MASK BROTHERS TRUCKING CO., INC. | SAINT LOUIS, MO | Busey Bank |
| $350,000–1 million | MASTERS BROTHERS, INC | BLOOMINGTON, IL | Busey Bank |
| $150,000–350,000 | MATCHBOOK CREATIVE INC. | INDIANAPOLIS, IN | Busey Bank |
| $150,000–350,000 | MATCO FIRE PROTECTION, INCORPORATED | PAXTON, IL | Busey Bank |