- White Castle #70
- White Palace Grill
- White Star Parking Service LLC
- Whitehouse Post Productions, LLC
- Whole Foods Market
- Why Knot Fibers
- Wichita Packing Co.
- Wielgus Product Models
- Wigglyville
- Wight & Company
- Wight Construction Services
- Wild Fork Foods
- Wilks Communications Group
- William Blair
- William Blair Investment Management
- William J Cassidy Tire & Auto
- Williams Lea, INC.
- Wilson Dow Group, INC
- Wine On Taylor
- Wings Over Canal
- Winsight, LLC
- Wireless Advocates LLC
- Wishbone Management, LP
- Wishbone Restaurant
- Withlove Collective
- Wls Bath & Kitchen Distributors INC.
- Wm. J. Cassidy Tire & Auto Sup
- Wndr Museum
- Woke Soul Coffee LLC
- Wolf Point Distilling
- Woman Made Gallery
- Woolweed
- Workbench, INC.
- Workbox
- Workbox
- Working In The Schools, INC.
- World Discount Auto
- World Of Astrology Boutique And More
- World Wide Technology, LLC
- Worldpac, INC.
- Worley Ecr Services, INC.
- Write2win Communications LLC
- Wuensche USA
- X-golf Southloop
- Xaxis LLC
- Xerox Corporation
- Xi'an Cuisine West Loop
- Xicue LLC
- Xl Unlimited
- Xsell Technologies, INC.
- Y & H Foods INC
- Yasmeen Mattress INC
- Ying Wei
- Yjdecorating
- Yochicago
- Yochicago
- Yoga Sound Bath
- Yokocho
- Yolk
- Yummy Halal Food
- Yummy Thai
- Yummy Thai
- Z Lang INC
- Zachary Konan
- Zacks Investment Management
- Zacks Investment Research, INC.
- Zeitlin's Delicatessen
- Zen Dogs Chicago INC.
- Zen Leaf West Loop
- Zenb Us, INC.
- Zeroed Supply LLC
- Zeus Gyros INC
- Ziken Signage
- Zionluxe
- Zivra, LLC.
- Zoe Life Fulton Labs Incubator LLC
- Zoro
- Zuno Photographic, INC.
- Zutale Design