- Krc Maintanance
- Krewe
- Krigler Chicago LLC
- Kriser's Natural Pet
- Krista's Gourmet Products DBA Dip'n Good Dips
- Kristen Feurer
- Krueger International
- Krug INC
- Krystle Cleaners LLC
- Ksubi
- Kukdo Chemical America INC
- Kurfirstcorp LLC
- Kurtis Production LTD
- Kyuramen
- L.a. Burdick Chicago LLC
- L'agence
- L'appetito Imp Italian Fds INC
- L'aventino
- L'occitane En Provence
- La Baguette Louise
- La Borra Del Cafe Delaware
- La Brasileira Massage
- La Brasileira Massage LLC
- La Colombe Torrefaction, INC.
- La Fournette LLC
- La Grande Boucherie / Omakase Room
- La Storia
- La Sustancia
- La Tan
- La-z-boy
- Lab Corp
- Lab42 Research
- Labriola Bakery Cafe
- Lacey Chester
- Lacott Fine Art
- Ladder Up
- Lady May Chicago
- Ladysmith Jewelry Studio
- Lafayette 148
- Lake Capital
- Lake Elinor LLC
- Lake Point Cleaners
- Lake Point Cleaners
- Lake Point Cleaners #2
- Lake Shore Groceries
- Lake Shore Marketplace
- Lakefront Operations, INC
- Lakefront Window Cleaning
- Lakeshore Home Cleaning LLC
- Lale
- Lamar Advertising Company
- Lance C. Brown
- Lance Rhodes LLC
- Landau
- Landau
- Landmark Home Cleaning
- Landrock LP
- Lane Venture
- Lang Ocean Spa Thai Bodywork
- Lans
- Lao Sze Chuan Downtown
- Laperior Foot Spa
- Larrabee Cleaners, INC.
- Lasalle Cleaners
- Lasalle Cleaners
- Lasalle Flowers
- Lasalle Flowers INC
- Lasalle Power Co. / Heart And Soul
- Laseraway
- Lash Design
- Lashcafe
- Lashes By Yanna
- Lateral Fitness
- Laumann Strategies LLC
- Laundry And Storage Service Of Illinois LLC
- Lauren Collander Interiors
- Lauren G Does Hair
- Lauren Lopez
- Lauren Taylor Hair LLC
- Laurisa Rogers
- Lavia Corporation
- Law Bulletin Media
- Lawyers For The Creative Arts
- Laz Parking LLC
- Lb Wilson
- Le Colonial
- Le French Patisserie
- Le Labo Fragrances
- Le Point Visible
- Leah Chavie Skincare Boutique
- Leah Storrs Art & Design
- Leanne Modell
- Leap Innovations
- Lease Harbor LLC
- Leblon Fitness Club
- Lee Roski LTD.
- Legacy Marketing Partners
- Legacy Parking Company, LLC
- Legacy Rail Operations LLC
- Legacye Health Agency
- Legal Sea Foods
- Lego Store
- Leia Marie Beauty
- Leica Camera INC.
- Lencrafters #8616
- Lennard Taylor Design
- Leonidas Cafe Chocolaterie
- Les Nomades Limited Prtnershp
- Leslie Brainard Arthur
- Lester Lampert
- Lettrlabs
- Levain Bakery
- Levant Barbershop
- Level Hotels & Furnished Suites
- Level-old Town
- Levi's Only Stores, INC
- Levy At The Hand And The Eye
- Levy(events)limited Partnership
- Lexyta 5, INC.
- Lg Development Group LLC
- Lg's Bar & Kitchen
- Lia
- Lick
- Lidia Sladojevic Sola
- Lids
- Life Spice
- Life Time Work
- Lifestart Wellness Network
- Lift Chicago
- Lighthouse Artspace Chicago
- Lighthouse Systems INC
- Lightitech
- Lightning Construction
- Lightology
- Lil' Ba-ba-reeba!
- Lilly Group, INC.
- Lin Bader
- Linak U.s.
- Linas Dailide
- Lincoln Clean Energy
- Lincoln Park Capital LLC
- Lincoln Park Preschool
- Linda Levinson Designs INC.
- Lindo System INC
- Linguanational Translations, INC
- Lion Parking
- Liquor Box
- Lira Center
- Lira Guzi Salon Co.
- Lisa Schenkman
- Lisa Simone Skincare LLC
- Lisa's Boutique Catering, LLC
- Lisa's Nail Salon INC.
- Liska + Associates INC.
- Listing 2 Leasing, LLC
- Lite
- Lito's Revival
- Little Forest Massage
- Live Clean INC.
- Livewater Trading LLC
- Livingart By Terry
- Livingstone Partners LLC
- Lizzano
- Lizzie Mcneill's
- Lk Growth LLC
- Local Eclectic
- Locked And Layered LTD.
- Loewe LLC
- Lofology
- Loft # 1879
- Loft Nail Spa At Huron LLC
- Loftus & O'meara Staffing, INC.
- Logicgate, INC.
- Logistical Resources, LLC
- Londo Mondo LTD
- Lookingglass Theatre Company
- Loom & Line Barber Theory
- Lorenzo's Frozen Pudding
- Loske Marine Services LLC
- Lost Larson
- Lotno2
- Lotus Banh Mi
- Lou Malnati's
- Lou Malnati's Pizzeria
- Louis Vuitton
- Lovers Playground
- Lovesac
- Loving Charlotte
- Lowell House Condominium Assoc
- Lowitz & Sons INC
- Loyal Spa La Salle INC
- Loyola University Of Chicago
- Loyola University Watertower Store #1122
- Lr Contracting Co
- Lr Managment Company
- Lsp Cleaners
- Luca Lanzetta, LLC
- Lucid Group Usa, INC
- Lucky Skye Graphics
- Lucky Strike Lanes