| $150,000–350,000 | JADE CONSTRUCTION INC | Hebron, IN | 1st Source Bank |
| $350,000–1 million | JAEGER UNITEK SEALING SOLUTIONS INC | LA PORTE, IN | 1st Source Bank |
| $350,000–1 million | JAMES E FULTON + SONS INC | KALAMAZOO, MI | 1st Source Bank |
| $350,000–1 million | JAMES E. FULTON & SONS INC. | Kalamazoo, MI | 1st Source Bank |
| $150,000–350,000 | JASPER INCORPORATED | FORT WAYNE, IN | 1st Source Bank |
| $150,000–350,000 | JAY HARLAND CORPORATION | Springfield, MA | 1st Source Bank |
| $150,000–350,000 | JAY HARLAND CORPORATION | SPRINGFIELD, MA | 1st Source Bank |
| $150,000–350,000 | JB AND RL INC | FORT WAYNE, IN | 1st Source Bank |
| $1–2 million | JB TOOL DIE & ENGINEERING COMPANY INC. | Fort Wayne, IN | 1st Source Bank |
| $350,000–1 million | JCI BRIDGE GROUP INC | LA PORTE, IN | 1st Source Bank |
| $150,000–350,000 | JEM CONCRETE DRILL & SAWING INC | Granger, IN | 1st Source Bank |
| $150,000–350,000 | JEM CONCRETE DRILLING AND SAWING INC | GRANGER, IN | 1st Source Bank |
| $1–2 million | JET TECHNOLOGIES INC | ELKHART, IN | 1st Source Bank |
| $150,000–350,000 | JHK INC | Osceola, IN | 1st Source Bank |
| $150,000–350,000 | JHK INC | OSCEOLA, IN | 1st Source Bank |
| $150,000–350,000 | JNK, INC. | SOUTH BEND, IN | 1st Source Bank |
| $350,000–1 million | JOHN BOETTCHER SEWER & EXCAVATING CONTRACTOR LTD | Mishawaka, IN | 1st Source Bank |
| $350,000–1 million | JOHN BOETTCHER SEWER AND EXCAVATING CONTRACTOR LTD | MISHAWAKA, IN | 1st Source Bank |
| $1–2 million | JONES PETRIE RAFINSKI CORP | SOUTH BEND, IN | 1st Source Bank |
| $150,000–350,000 | JOURNEY TRUCKING INC | Fort Wayne, IN | 1st Source Bank |
| $150,000–350,000 | JOURNEY TRUCKING INC. | FORT WAYNE, IN | 1st Source Bank |
| $350,000–1 million | JOURNEYS BEHAVIOR LEARNING CENTER LLC | MISHAWAKA, IN | 1st Source Bank |
| $350,000–1 million | JUST FOUR WHEELS INC | Absecon, NJ | 1st Source Bank |
| $350,000–1 million | JUST FOUR WHEELS INC | Galloway, NJ | 1st Source Bank |
| $150,000–350,000 | K & G ENTERPRISES | ANGOLA, IN | 1st Source Bank |
| $150,000–350,000 | K & S PALLET INC | Fort Wayne, IN | 1st Source Bank |
| $150,000–350,000 | K&S PALLETS INC | FORT WAYNE, IN | 1st Source Bank |
| $350,000–1 million | KABELIN HARDWARE COMPANY INC. | LA PORTE, IN | 1st Source Bank |
| $150,000–350,000 | KALAMAZOO ORTHODONTICS, P.C. | PORTAGE, MI | 1st Source Bank |
| $350,000–1 million | KAMPCO STEEL PRODUCTS INC. | ELKHART, IN | 1st Source Bank |
| $1–2 million | KASER FLEET LLC | MISHAWAKA, IN | 1st Source Bank |
| $1–2 million | KASER FLEET LLC | Mishawaka, IN | 1st Source Bank |
| $150,000–350,000 | KELCHCO INC. | Royal Oak, MI | 1st Source Bank |
| $150,000–350,000 | KELSEY'S OF VALPARAISO, INC. | VALPARAISO, IN | 1st Source Bank |
| $350,000–1 million | KELSEYS OF VALPARAISO INC | Michigan City, IN | 1st Source Bank |
| $150,000–350,000 | KEMP ELECTRIC INC | Nappanee, IN | 1st Source Bank |
| $150,000–350,000 | KEMP ELECTRIC INC | NAPPANEE, IN | 1st Source Bank |
| $2–5 million | KENNESAW TRANSPORTATION INC. | RYDAL, GA | 1st Source Bank |
| $150,000–350,000 | KENSINGTON DIGITAL MEDIA OF INDIANA LLC | Warsaw, IN | 1st Source Bank |
| $150,000–350,000 | KEY EXTERIORS INC | Fort Wayne, IN | 1st Source Bank |
| $150,000–350,000 | KEYSTONE MANUFACTURING, LLC | KALAMAZOO, MI | 1st Source Bank |
| $150,000–350,000 | KIDNEY CARE OF MICHIANA LLC | MISHAWAKA, IN | 1st Source Bank |
| $350,000–1 million | KIRKLAND CONSTRUCTION LLLP | Rye, CO | 1st Source Bank |
| $350,000–1 million | KIRKLAND CONSTRUCTION LLLP | RYE, CO | 1st Source Bank |
| $350,000–1 million | KLCA INC | Warsaw, IN | 1st Source Bank |
| $350,000–1 million | KLCA INC | Warsaw, IN | 1st Source Bank |
| $150,000–350,000 | KNOX WINAMAC COMMUNITY HEALTH CENTERS INC | KNOX, IN | 1st Source Bank |
| $2–5 million | KOENIG EQUIPMENT INC | BOTKINS, OH | 1st Source Bank |
| $150,000–350,000 | KROPP FIRE PROTECTION | South Bend, IN | 1st Source Bank |
| $150,000–350,000 | KROPP FIRE PROTECTION INC | SOUTH BEND, IN | 1st Source Bank |
| $1–2 million | KRUGGEL LAWTON & CO LLC | SOUTH BEND, IN | 1st Source Bank |
| $1–2 million | KUERT CONCRETE INC. | SOUTH BEND, IN | 1st Source Bank |
| $350,000–1 million | KW CUSTOM CONTROLS LLC | South Bend, IN | 1st Source Bank |
| $350,000–1 million | KW CUSTOM CONTROLS LLC | SOUTH BEND, IN | 1st Source Bank |
| $2–5 million | KW SERVICES LLC | SOUTH BEND, IN | 1st Source Bank |
| $150,000–350,000 | L J HENDERSON INC. | Waterloo, IN | 1st Source Bank |
| $1–2 million | LA GRANGE CRANE SERVICE INC. | LA GRANGE, IL | 1st Source Bank |
| $350,000–1 million | LA LUMIERE SCHOOL | LA PORTE, IN | 1st Source Bank |
| $350,000–1 million | LA LUMIERE SCHOOL INC. | Laporte, IN | 1st Source Bank |
| $350,000–1 million | LACASA OF GOSHEN INC. | GOSHEN, IN | 1st Source Bank |
| $350,000–1 million | LADUE CURRAN & KUEHN LLC | South Bend, IN | 1st Source Bank |
| $350,000–1 million | LADUE CURRAN & KUEHN LLC | SOUTH BEND, IN | 1st Source Bank |
| $150,000–350,000 | LAIDIG CONCRETE INC. | MISHAWAKA, IN | 1st Source Bank |
| $350,000–1 million | LAKE CITY HEAT TREATING INC | Warsaw, IN | 1st Source Bank |
| $1–2 million | LAKELAND IMMEDIATE CARE CENTER | CASSOPOLIS, MI | 1st Source Bank |
| $350,000–1 million | LASALLE HOSPITALITY GROUP INC | South Bend, IN | 1st Source Bank |
| $350,000–1 million | LASALLE HOSPITALITY GROUP INC | South Bend, IN | 1st Source Bank |
| $150,000–350,000 | LASTOS 1 INC | Knox, IN | 1st Source Bank |
| $350,000–1 million | LATITUDE SERVICE COMPANY INC | PLYMOUTH, IN | 1st Source Bank |
| $350,000–1 million | LEGACY HEATING AND AIR INC | ELKHART, IN | 1st Source Bank |
| $150,000–350,000 | LEGEND COMMERCE CT LLC | East Haven, CT | 1st Source Bank |
| $150,000–350,000 | LEGEND COMMERCE CT LLC | EAST HAVEN, CT | 1st Source Bank |
| $350,000–1 million | LEMASTER STEEL ERECTORS INC | Elkhart, IN | 1st Source Bank |
| $350,000–1 million | LEMASTER STEEL ERECTORS, INC. | ELKHART, IN | 1st Source Bank |
| $350,000–1 million | LESCO DISTRIBUTING INC | SOUTH BEND, IN | 1st Source Bank |
| $350,000–1 million | LIBERTY STEEL FABRICATING INC | Saint Joseph, MI | 1st Source Bank |
| $350,000–1 million | LIBERTY STEEL FABRICATING INC. | SAINT JOSEPH, MI | 1st Source Bank |
| $150,000–350,000 | LIBERTY WINGS INC | Niles, MI | 1st Source Bank |
| $150,000–350,000 | LINCOLN COUNSELING, PC | MISHAWAKA, IN | 1st Source Bank |
| $150,000–350,000 | LIQUID PACKAGING SOLUTIONS INC. | LA PORTE, IN | 1st Source Bank |
| $150,000–350,000 | LJ HENDERSON INC | WATERLOO, IN | 1st Source Bank |
| $150,000–350,000 | LML AUTOMATED SYSTEMS, INC. | CHESTERTON, IN | 1st Source Bank |
| $150,000–350,000 | LMP CORPORATION | SOUTH BEND, IN | 1st Source Bank |
| $350,000–1 million | LMSG LOGISTICS, INC. | ROLLING MEADOWS, IL | 1st Source Bank |
| $150,000–350,000 | LOCAL MARKETING SOLUTIONS GROUP INCORP | Rolling Meadows, IL | 1st Source Bank |
| $150,000–350,000 | LOCAL MARKETING SOLUTIONS GROUP, INC. | ROLLING MEADOWS, IL | 1st Source Bank |
| $150,000–350,000 | LOCHMANDY LOWERY DEALER DEVELOPMENT LLC | ELKHART, IN | 1st Source Bank |
| $350,000–1 million | LOGISTICK INC | South Bend, IN | 1st Source Bank |
| $150,000–350,000 | LUCATA CORPORATION | NEW YORK, NY | 1st Source Bank |
| $150,000–350,000 | LUCATA CORPORATION | New York, NY | 1st Source Bank |
| $150,000–350,000 | MAB EVENTS CORP | SOUTH BEND, IN | 1st Source Bank |
| $150,000–350,000 | MAB EVENTS CORP. | South Bend, IN | 1st Source Bank |
| $350,000–1 million | MAC ENGINEERING & EQUIPMENT COMPANY, INC | BENTON HARBOR, MI | 1st Source Bank |
| $350,000–1 million | MAC ENGINEERING AND EQUIPMENT COMPANY INC. | Benton Harbor, MI | 1st Source Bank |
| $350,000–1 million | MACK TOOL & ENGINEERING , INC. | SOUTH BEND, IN | 1st Source Bank |
| $350,000–1 million | MACK TOOL & ENGINEERING INC | South Bend, IN | 1st Source Bank |
| $150,000–350,000 | MADISON MANUFACTURING INC. | BREMEN, IN | 1st Source Bank |
| $150,000–350,000 | MAGIC GLASS HOLDINGS, LLC | LAFAYETTE, IN | 1st Source Bank |
| $150,000–350,000 | MAIN STREET MANAGEMENT LLC | LAFAYETTE, IN | 1st Source Bank |
| $350,000–1 million | MAITLAND ENGINEERING INC | South Bend, IN | 1st Source Bank |