- Herby Living, Incorporated
- Here Here, INC.
- Heritage 676 LLC
- Heritage Hospitality
- Hermes Of Paris, INC
- Hernan Roldan
- Hertz
- Hevi Cafe
- Hey Mushu
- Hey Rowan, INC.
- Heyden LLC
- Hi - Bee Cleaners
- Hi Fi Fitness
- Hi Lite Corp
- Hi-lite Clark, INC.
- Hi-lite Cleaner LLC
- Hi-vibe
- Hideaway
- Highland Trade Partners, LLC
- Highline Bar And Lounge
- Higinbotham Capital, LLC
- Hilco Ip Merchant Banking
- Hildt Galleries Corporation
- Hill Family Pet Care, LLC
- Hilton Chicago Magnificent Mile Suites
- Hilton Chicago Magnificent Mile Suites
- Hilton Chicago Magnificient Mile Suites
- Hilton Chicago/ Magnificent Mile Suites
- Hilton Contemporary
- Hilton Garden Inn Chicago Downtown/magnificent Mile
- Hilton Garden Inn Downtown Magnificent Mile
- Hilton Grand Vacations Chicago Downtown Magnificent Mile
- Hilton Resorts Corporation
- Hines Interest Limited Partnership
- Hipolito Martinez
- Hispanic Housing Development Corporation
- Hm Day Spa
- Hobos Ventures, LLC
- Holiday Inn Chicago Downtown-wolf Point & Voco Chicago Downtown
- Holiday Inn Express
- Holiday Inn Express Mag Mile Cass
- Holistic Health Practice, LLC
- Holland & Sherry
- Hollister Co. # 33564
- Holly Hunt Enterprises, INC.
- Hollyhuntpartners
- Home 2 Suites Chicago River North
- Home Fields
- Home Inspection Star INC.
- Home2 Suites Chicago River North
- Homewood Suites
- Homewood Suites By Hilton Chicago Downtown
- Honda Of Downtown Chicago
- Honee Brown
- Honeybrains
- Honeycomb Services
- Honorary Chicago
- Hootenanny, LLC
- Hooters Of Wells St., INC.
- Hopsmith Tavern
- Hoskins Investment Management, INC.
- Hotel 55 Chicago
- Hotel Cass - Holiday Inn Express
- Hotel Chicago
- Hotel Chocolat
- Hotel Emc2
- Hotel Felix
- Hotel Felix
- Hotel One Sixty-six
- Hotel Palomar
- Hotel Riu Plaza Chicago
- Hotelblox, LLC
- Hour Of Change Fitness, INC
- House 22
- House 22 Salon And Spa
- House Of Blues Chicago, INC.
- House Of Dubai Inc.,
- Housing Plus NFP
- Howl At The Moon
- Hpt State Street Trs LLC
- Hubbard House Harvest Kitchen
- Hubbard Place Cleaners
- Hubbard State Cigar Shop
- Hubbard Steak
- Hubbard Street Dance Chicago
- Hubbard Street Group LLC
- Hubbard221
- Hudson Housing Capital LLC
- Hugo Boss Retail INC
- Hugo Technologies, INC.
- Hugo's Frog Bar
- Humanscale Corp
- Hunan Cuisine
- Hunden Strategic Partners
- Hungry Stack
- Huron Nails & Spa
- Hush Chicago
- Hyatt Centric Chicago Magnificent Mile
- Hyatt Centric Chicago Magnificent Mile
- Hydro Bakes
- Hydrology
- Hyperblack Studios LLC
- Hyperwork Solutions
- Hysoplus Cleaning Service
- I Weinberg Hosiery Co
- Iberico Express River North
- Ibrahim Bagasarawala
- Icg Italia
- Icon Advising, LLC
- Icoordinate, INC
- Id Est Vanitas, LLC
- Id Media, INC.
- Id8, LLC
- Ideal Appeals LLC
- Idof Fresh Mediterranean
- Idyllic Interiors
- Igor Menaker Corporation
- Ii Porcellino Hurtado Barbecue
- Ikler Informatics INC
- Ikram
- Ila's
- Illinois Bankers Association
- Illinois Franklin Associates, LLC
- Illuminarium Experiences
- Illuminate Me, LLC
- Illy River North
- Image Base INC
- Image Studios Chicago - River North
- Imale
- Iml Group, LLC
- Immaculate Conception
- Imperial Cleaners
- Imperial Cleaners
- Imperial Lamian
- Impressions Diamond Company LLC
- Ina
- India House
- Indienne
- Indispensable Lookz
- Indochino Apparel
- Indoor Special Event
- Industrious
- Inergy Managment, LLC
- Infiniscene, INC.
- Information Technology Architect INC.
- Infrared Testing, INC
- Ingrained
- Inhabit Concrete Design
- Initiative Media, LLC
- Inkspot Design INC
- Inmarket Media LLC
- Inn Of Chicago Magnificent Mile
- Innovations In Wallcoverings
- Inovative Parking Solutions
- Insight Global, LLC
- Insomnia Cookies
- Instituto Cervantes
- Intact Us, INC.
- Intercontinental Hotel Chicago
- Interface Americas, INC.
- Interior Crafts
- Interior Design By A. Valentine
- Interior Design By A. Valentine
- International College Of Surgeons
- International Family Entertainment INC
- International News
- Internet Webpages Newspaper, INC.
- Interpark
- Interwest Chicago Hotel, LLC
- Intralink Global LLC
- Introstem
- Investigator Support Services
- Invexos
- Invision Communications, INC.
- Io The Alien
- Ion Media Networks
- Ion Media Stations, INC.
- Ipops, LLC
- Irepair
- Iris Galerie
- Irma's Beauty Salon
- Iron Fist Express Trucking
- Isaia Corp.
- Isolt LLC
- It's All About Maggie Eyebrows
- It'sugar
- Itochu International INC.
- Ivie Group LLC
- Ivy Hotel
- Izzy's Place
- J & B Signs, INC.
- J Andrews Salon
- J Krcic Leather
- J Marshall Design INC.
- J Robert Scott INC.
- J. C. Lind Bike Company
- J. Crew
- J. Emmett Studios
- J.b. Realty
- J.jill