- Marchetti Special Events, LTD.
- Marci Maxine LLC
- Marco Lighting Components INC
- Marcus Halawi
- Maredi Design
- Marek Ciesla Barbershop
- Margo Medenica
- Margo Medenica
- Marguerite Gardens
- Maria Paternoster
- Maria's Lounge
- Maria's Tax & Notary
- Mariano's #8527 Ukranian Village
- Marigold Market
- Marine Layer
- Mario & Cesar's Jewelry
- Mario Ink
- Mariscos La Costa
- Market Select
- Marquin Salon
- Marroqueen
- Marshmallow Beauty Bar
- Mart Anthony
- Martin Delgado & Associates
- Marv's Handyman Services LLC
- Marvin Luke Hinson
- Mason & Bone
- Mason Shishaware
- Massage Envy Spa
- Masseyfit, LTD.
- Master Gauge Co.
- Match | A
- Matt Ott
- Matthew James Kellen
- Matthew L. Knopf
- Matthew Long
- Matthew P Merjavy
- Matthew W. Rachman
- Mattress Firm #119161
- Mauge INC
- May 1st Nail Spa
- May Yin Yang INC
- Mayambo Dance Academy
- Mayday Tattoo Supply
- Mayday! Tattoo Co.
- Mayra's Hair Salon
- Mays Boutique And Psychic Consultant
- Mazi Dance Fitness Centre
- Mazor
- Mbs Equipment Company Chicago
- Mca Warehouse
- Mcdonald's
- Mcdonald's #7788
- Mcgrath Acura Of Downtown Chicago
- Mcgrath Lexus
- Mdev Corp
- Meaghan Perdue
- Media Made Great
- Media Monkeybiz
- Meeow Chicago
- Mega Doshi
- Mega Security
- Melissa Garfinkle
- Melissa Klein Design
- Melissa Simone Kowalewski
- Meraki Room
- Mercedes Benz Of Chicago
- Mercedes Benz Of Chicago
- Mess Marketing
- Metalco, INC.
- Metamorph Studios
- Metaphrasis Language & Cultural Solutions, LLC.
- Metro By T-mobile
- Metro Self Storage
- Metropolitan Automan
- Mhealthcoach
- Michael A. George
- Michael Collins
- Michael Del Piero Good Design, LLC
- Michael Kiriazis
- Michalik Funeral Home, INC.
- Michelle Hayward
- Michelle Hirschtritt
- Micmos Studios
- Midcity Engineering
- Midway Building Services, LTD
- Midway Moving & Storage, INC.
- Midwest Academy For Gifted Education, NFP
- Midwest Hauling Group INC.
- Midwest Outdoor Skills Training
- Miguel Angel Ozuna
- Mike's Furniture
- Mild Sauce Apparel
- Mildblend INC.
- Milk & Honey Cafe
- Miller's Eureka INC
- Millys Pizza In The Pan
- Milwaukee Furniture
- Mindful Goods
- Minds Matter Of Chicago
- Mindy's Bakery LLC
- Minerva Carlos
- Minilux Nail Salon
- Mintropy
- Mirai Sushi
- Mirella's Tavern
- Misano
- Misobunnycafe
- Miss Nyet Publishing, LLC
- Mississippi Management, LLC
- Mister Tiger
- Mitir Patel
- Mixmatch Lighting
- Mixteco Grill #3 LLC
- Mmd Bridge Chicago LLC
- Mme, LLC
- Mn Construction Co. INC
- Mo2 Properties LLC
- Modern Gentlemen Salon
- Modern Research Solutions LLC
- Moe Mattress
- Mohop
- Moira & Company
- Mojo Spa LLC
- Mokin Investments LLC
- Molly
- Molly Maid Of The Gold Coast And Near North
- Moloko Ukranian Festival
- Mon Lung Chop Suey
- Monarch Catering Company
- Mongerson Galleries INC.
- Monica Jarava
- Monica Martina Vargas
- Monique Meloche Gallery INC.
- Montanamilan , LLC
- Montessori Magpie
- Moonlight Studios, INC.
- Morgan Manufacturing
- Mosaic Music
- Motivate International INC.
- Mott St.
- Move Along Coffee LLC
- Mr. Brown's Lounge
- Mr. Dave Music, LLC
- Mr. Kite's Chocolate
- Mr. P Beverage Depot
- Mr. Taco's Restaurant
- Mu Gallery
- Muddy Mutts
- Mulberry & Me
- Multiservicios Loremex 2
- Mundo Latino #2
- Municipal Foods
- Muse Community + Design
- Muse Laser Spa
- Music House
- Mutz
- Muzyka Funeral Home
- Mvo Hair
- Mvp Cuts Barber Shop
- My Concept Room
- My Rescue Marketing, INC.
- Myeyedr.
- Myopic Books
- Myopic Books
- Mysha INC.
- Mythical Smokes
- Mz Wallace
- N - Fagin Books
- N/a
- N/a
- Nabi Cleaner
- Nadc Burger / Sushi By Scratch Restaurants: Chicago
- Nail By J
- Nail Force One LLC
- Nail Lashes Studio
- Nailacarte Wicker Park
- Nails Lashes Studio
- Nalini Arantes Design
- Namca Contractors INC.
- Napa Auto Parts
- Natalie Ginele Miller Photography LLC
- Nate Berkus Entertainment, INC.
- Nate Berkus Media
- Nathan Miller
- Nathaniel Boyd Iii
- National Air Duct
- National Museum Of Puerto Rican Arts And Culture
- National Painting, INC.
- Native Foods Cafe
- Natru
- Naty's Pizza #2
- Naveen' S Cuisine
- Ne Plus Ultra
- Near North Montessori School
- Neighborhood Housing Services Of Chicago, INC.
- Nellies
- Nelly's Cleaners
- Nettare
- Neutron Holdings, INC