| Name | Phone | Category |
| MACHINE SOLUTION PROVIDERS, INC. | (630) 717-7040 | |
| MADDEN LAW LLC | (312) 625-2212 | Attorneys |
| MAGNOLIA SOAP AND BATH DOWNERS GROVE | | Retail |
| MAIN EVENT ENTERTAINMENT | (630) 393-9400 | |
| MAINSTREET ORGANIZATION OF REALTORS | (630) 324-8400 | Real Estate - Residential |
| MAPLE & MAIN APARTMENTS - DOWNERS GROVE | (331) 979-1010 | |
| MAR HEALTH & PERFORMANCE | (312) 371-5671 | |
| MATHIESON, MOYSKI, AUSTIN & CO., LLP | (630) 653-1616 | |
| LAW OFFICES OF MATHYS & SCHNEID | (630) 428-4040 | Attorneys - Consumer |
| MCALISTER'S DELI | (331) 233-6363 | Restaurants - Casual Dining |
| MCBATH CONSTRUCTION | (630) 325-6555 | Construction |
| MCBROOM FINANCIAL GROUP | (630) 873-2124 | Small Business Advisory |
| TIMOTHY MCJOYNT | (630) 407-8852 | Civic Member |
| MELANIE LODDER KELLER WILLIAMS INFINITY | (630) 362-2645 | Real Estate |
| MENCHIE'S - DOWNERS GROVE | (815) 508-0765 | Food Service |
| MERCHAB CONSULTING GROUP, INC. | (630) 886-4455 | |
| METROPOLITAN FAMILY SERVICES | (630) 221-8290 | Social & Human Services |
| MG COMPUTER, INC. | (630) 605-5395 | Computer Consulting |
| MIDWEST EYE, PC | (630) 560-4730 | Optometry |
| MIDWESTERN UNIVERSITY | (630) 515-6171 | Health Care Education |
| MIDWESTERN UNIVERSITY MULTISPECIALTY CLINIC | (630) 743-4500 | Health Care Services |
| MINT VISION PLLC | (630) 463-0990 | Optometry |
| MR. HANDYMAN OF WHEATON-HINSDALE | (630) 225-7663 | Handyman |
| MULTI PRINT AND DIGITAL | (630) 985-2600 | Printing |
| MY BUDGET ARCHITECT LLC | (773) 580-4949 | |