- Midwest String Rentals LTD
- Mikva Challenge Grant Foundation
- Milhouse Development, LLC
- Milhouse Engineering & Constuction INC.
- Milhouse Snow
- Millan Chicago
- Millenium Cleaners
- Millenium Park Loft
- Millennium Park Jewelers & Engravers
- Millennium Park Joint Venture, LLC DBA The Park Grill
- Millennium Park Living INC
- Millennium Taco And Dogs
- Miller's Pub Restaurant
- Millers Supply Co., INC.
- Milliman Financial Risk Management LLC
- Milliman Usa, INC
- Min.i.mal.ism Fashion LLC
- Minghin On Grant Park
- Mintel Americas
- Mipotofu
- Mir Appraisal Services INC.
- Mirata Software, LLC
- Mitel Networks, INC
- Mitsui & Co (u.s.a.)inc
- Mitsui Rail Capital, LLC
- Mixed Greens
- Mmp Associates, INC
- Mochinut
- Model Atelier
- Modern Parking Services
- Modis, INC.
- Mohican Petroleum INC
- Mojo
- Mojo 33 North Lasalle LLC
- Mojo Coffee
- Mojo South Wacker
- Molloy Consulting Incororated
- Molly's Cupcakes
- Molson Coors Beverage Company USA LLC
- Momadou's Jewelry & Clothing
- Momento Cantina
- Momentum Coffee
- Momentum Coffee
- Mon Ami Jewelry
- Monadnock Tobacco Mart Express
- Monarch Catering Company
- Monere Holdings, INC.
- Monica Petrik
- Monk's Pub
- Monroe Financial Partners, INC.
- Montani Cosmetics, INC.
- Mood Fabrics
- Moody Nolan, INC
- Mop N Go
- Mor Diamonds, LLC
- Morgan Services, INC.
- Morgan Stanley & Co. LLC
- Morgan Stanley Investment Management INC
- Morgan Stanley Smith Barney LLC
- Morgan Vessels LLC
- Morguard Coast LLC
- Morning Glo Cafe
- Morningstar Credit Information & Analystics LLC
- Morningstar Research Services, LLC.
- Morningstar, INC
- Morris Anderson
- Morton's Steakhouse-wacker Place
- Motherson Sumi Infotech & Design
- Motion Recruitment Partners LLC
- Motion Recruitment Partners LLC
- Motion Unlimited
- Move Sales, INC.
- Moving Station
- Mpd Foundation
- Mplace, INC
- Mr Submarine
- Mr. Appliance Of West Loop
- Mr. Diamonds, INC.
- Mr. Klean
- Mrs Fields Cookies
- Msbam 2012-c6 West Adams Street LLC
- Msr Express Gold Refining
- Mulholland Legal Recruiting INC.
- Muller & Monroe Asset Management, LLC
- Munchies
- Murphy Recruit Corp.
- Museum Of Illusions
- Music And Dance Theater Chicago
- Music Minds Studio
- Music Of The Baroque
- Mutli-park Chicago, INC.
- Mvp One
- Mwm Consulting
- My Chicago
- My Mail Center
- My Parking
- My Wellness Community DBA Method Health
- Myeyedr Optometry Of Illinois
- Mythical Smokes
- N-v Hair Studio
- N. Green And Sons
- N/a
- N/a
- N/a
- N/a
- N/a
- N/a
- N/a
- N/a
- Naansense
- Nadex
- Naf Naf Grill
- Naf Naf Grill
- Naf Naf Middle Eastern Grill
- Naf-naf Grill
- Nail Pro
- Nail Spa On State
- Nailcessity
- Nailpro
- Nakamol Design
- Namtor, INC.
- Nando's Peri-peri
- Nando's Peri-peri
- Nando's Peri-peri
- Nanhua USA LLC
- Naprapathy Integrative Health & Wellness
- Narrative Science INC.
- Nascar Events And Entertainment , LLC
- Nat'l Diamond Syndicate INC
- Natasha Miner
- National Automatic Merchandising Association/nama
- National Beef Packing Company
- National Cinemedia
- National Corporate Research INC.
- National Council Of State Boards Of Nursing
- National Economic Research Associates, INC.
- National Fiber Supply LLC
- National Investment Services
- National Louis University
- National Marine Manufacturers Association, INC.
- National Restaurant Association
- Nationwide Investment Svc
- Native Food Cafe
- Native Foods Cafe
- Naturalizer
- Naturopathic Nirvana Consulting LLC
- Nautilus Solar Energy
- Navigate Research
- Navikan INC
- Navkar Food INC.
- Nb Global Imports INC.
- Nba All Star Event
- Nbpa
- Ndi Aro Holdings
- Nds LLC
- Nealshow Productions LLC
- Necessary & Sufficient Coffee - Printer's Row
- Necessity Health Scrubs LLC
- Negen Technologies LLC
- Nelson Mullins Riley & Scarborough LLP
- Neon Avenue INC.
- Neostella
- Nerissa B. Modern Calligraphy LLC
- Nesh Mediterranean Grill
- Nesh Mediterranean Group INC.
- Netapp, INC
- Netikus.net LTD
- Netrality Properties
- Neuberger Berman Investment Advisers LLC
- Neuberger Berman LLC
- Neutral Tandem-illinois, LLC
- New Age Technology Construction Company
- New England Research & Management, INC.
- New Frontier Developments, Co.
- New Orleans Kitchen
- New Vista Investment Group, LLC
- New Ways Learning
- New York Jewelers
- Newport Capital Partners
- News America Marketing In-store Services
- News And Views
- Nexamp, INC.
- Next Gen Foods, INC.
- Nextcapital Group LLC
- Nextcapital Group, INC.
- Nextgen Global Resources
- Nexum, INC.
- Nexus Home Health INC.
- Nice And Distressed
- Nicholas Dinardi
- Nicos Vision
- Nielsen Business Worldwide
- Nielsen Consumer LLC
- Nikda LLC
- Nike Retail Services, INC.
- Nirvana Technology Solutions
- Nitta
- Niu B
- No Limit Media Consulting, LLC
- Nobitlost LLC