- Inteliquent
- Intelligentsia Coffee & Tea
- Inter Capital Realty Corporation
- Intercontinental Diamond LLC
- Interior Alterations, INC.
- Interior Construction Group INC
- Intermodal Container Logistics LLC
- International Camera, INC.
- International Capital Associates
- International Cultured Pearl
- International Sandwich Shop
- International Society For Heart And Lung Transplantation
- International Sports Management
- International Women Associates, INC.
- Internet Webpages Newspaper, INC.
- Interocean Advisors
- Interpark
- Interprenet, LTD
- Interwoven, INC.
- Intouch Solutions, INC.
- Inv.sion, LLC
- Invenergy
- Ion Media Network, INC.
- Ira Club
- Irenity INC.
- Iridium Lab 77
- Iron Galaxy Studios
- Ironwood Capital Management
- Iscientia LLC
- Isi Telemanagement Solutions, LLC
- Island Party Boat LLC
- Island Party Hut
- Ispectra
- It Takes A Village At River City
- It Takes A Village On Wabash, LLC
- Italian Village Restaurant, INC.
- Itiviti USA INC.
- Iwan Ries & Co
- J & Ben Jewelry INC.
- J & J Arnaco LLC
- J & J Diamond World Corporation
- J & J Fish
- J & K Mfg Jewelers Corp
- J C Mfg. Jewelers
- J Fashion Enterprises / Shop The Thrifty Fashionista
- J M Jewelry Shop INC
- J. & D. Alterations INC
- J. Erlien
- J. Huell Briscoe And Associates, INC.
- J.s. Held LLC
- J's Blossom Nail & Spa
- Ja Mex INC
- Jabari H.turner
- Jack Schwartz Importer
- Jackson & State Currency Exch
- Jackson Hewitt Tax Service
- Jackson's Dining Hall
- Jacobs & Clevenger
- Jacobson Executive Search
- Jacobson Rost
- Jahn Architecture, INC.
- James G Elliott Company
- James Hardie Building Products INC.
- Jams, INC.
- Janney Montgomery Scott LLC
- Janus Henderson Investors Us LLC
- Jarrard Phillips Cate & Hancock
- Jas Diamonds, INC
- Jasmines Nail Salon And Spa
- Jason Springs
- Jay Collen
- Jay Shree Ma Meldi INC.
- Jazz Institute Of Chicago INC
- Jazz Showcase
- Jazzy 4 Studio
- Jbc Funds 33 North Lasalle LLC
- Jbc/155 Development
- Jc Jewelers
- Jc Licht South Loop
- Jd Sports #23
- Jefferies LLC
- Jennifer Kane
- Jennifer Kelly
- Jerk Taco Man
- Jerrys Valet
- Jersey Mike's Subs
- Jet Engine Leasing LLC
- Jet Support Services, INC.
- Jet's Pizza
- Jewish Community Centers Of Chicago
- Jewish Council For Youth Services
- Jiao
- Jimmy John's
- Jimmy John's
- Jimmy John's
- Jimmy John's - Washington
- Jimmy John's Clark
- Jimmy John's- State
- Jimmy Johns
- Jimmy Johns
- Jimmy Johns
- Jimmy Johns
- Jimmy Williams Gallery And Studio
- Jimmy's Gyros & Grill
- Jirsa Development Group
- Jk & B Management LLC
- Jlm Custodian Management Services LLC
- Jm Jewelry Shop
- Jml Jewelry Corp.
- Jmp Securities LLC
- Job Career Critic
- Joe & The Juice
- Joes Auto Parks
- John A. Slivka
- John Angileri Barber Salon
- John Crane Group, LLC
- John E. Reid And Associates, INC.
- John Galt Solutions
- John Howard Association Of Illinois
- John K Becker & Company
- John Wise
- Johnson Consulting
- Johnson Research Group, INC.
- Joilates
- Jollibee
- Jon J Mitchell
- Jonathan Gabriel Greene
- Jonathan Grace Professional Group
- Jones Lang Lasalle Americas (illinois), L.P.
- Jones Lang Lasalle Americas, INC.
- Jones Lang Lasalle Midwest, LLC
- Jones Moore Construction & Consulting LLC
- Jorge Eliecer Ibata
- Jose P Rilloraza
- Joseph Freed & Associates, LLC
- Joseph T. Ryerson & Son INC.
- Journey's End Development Chi LLC
- Journeycare Home Health - Chicago
- Journeys #326
- Jps Interests
- Jssi Advisory Services, LLC
- Jssi Management Enterprises, LLC
- Jssi Parts, LLC
- Jst Remodeling
- Judge Technical Services, INC.
- Judith L. Ansteth Jewelers
- Juergens & Andersen Co.
- Juniper Advisory LLC
- Just A Dash Food Service Group
- Just Design LLC
- Just Salad
- Just Salad
- Just Salad
- Just Salad Store #46
- Justin Haber
- Justin Mei Jewelers, INC.
- Juvenile Diabetes Research Foundation
- Jw Jewelry
- Jw Marriott Hotel Chicago
- K V Gems
- K.b. Lewis Bed Bug / Cleaning Specialist
- Kaizen Health, INC.
- Kakimi Gem Imports, INC
- Kamehachi Sushi Cafe
- Kameleon Consulting, LLC
- Kane,mckenna & Assoc INC
- Kaneesha Arnold
- Kaplan Test Prep
- Kareem Abdul-musawwir
- Kari Carbone & Company
- Karrot
- Kasa Chicago
- Kasey's Tavern
- Kassells Decorating Services LLC
- Katie Wesorick
- Katie Wesorick
- Kay Jewelers Outlet #4138
- Kaya Build
- Kc Eats & Treats
- Kc Jewelers, INC.
- Kcura LLC
- Keeper Security INC
- Kehoes Designs, INC
- Kelly Services, INC
- Kelly, Scott And Madison, INC.
- Kellys The Flower Shop
- Kemeny Overseas Products Corp
- Keming Li Design LLC
- Kemper Corporation
- Ken Antles
- Kendra Scott Design
- Kennedy Wilson Properties
- Kensington Research And Recovery, INC.
- Kerasotes Showplace Theatres, LLC
- Keys To Time
- Keystone Consulting Group LLC
- Kfa, INC.
- Kforce
- Khnpusa
- Kids + Company