| Name | Phone | Category |
| KALINAW VIRTUAL LLC | (657) 444-7387 | |
| KANE WEALTH GROUP | (630) 756-2595 | 401(k) Plan Specialist |
| KELLER WILLIAMS EXPERIENCE | (630) 598-0755 | Real Estate |
| KELLER WILLIAMS EXPERIENCE - EILEEN KENAH | (630) 404-2421 | Real Estate - Residential |
| KERWELL | (630) 960-0223 | Health and Wellness |
| KINDLY SOCIAL | (516) 510-3920 | Event Planning |
| KINGSWOOD ACADEMY | 630-887-1411 | Education |
| KOLNICKI, PETERSON & WIRTH, LLC | (630) 390-1140 | Accountants - Certified Public |
| KONICA MINOLTA BUSINESS SOLUTIONS | (630) 271-6900 | Computer Networking |
| KORWITTS CHIROPRACTIC | (630) 420-1887 | |
| THE KRAJNIAK GROUP | (630) 364-2406 | Financial Planning |
| KRAMER & HERBECK, LLC | (630) 983-0096 | Attorneys |
| KUHN, HEAP, & MONSON | (630) 420-8228 | Real Estate |