Mark Bâby

Mark Bâby

Managing Director
Stream Chicago
312.448.6220 773.272.5277

800 W. Fulton Street
Suite 750
Chicago, IL 60607

Proven Performance

Professional Experience

Mark Bâby is a Managing Director in Stream Realty Partners’ Chicago office, specializing in office agency leasing. Mark has represented office properties assets in the central business district and Fulton Market submarket, working with some of Chicago’s most active office investors. His clients include top owners in the Chicago market including Thor Equities, The Feil Organization, Accesso Partners and Starwood Capital.

Prior to joining Stream, Mark was a member of the Chicago Cushman & Wakefield agency leasing team and was responsible for the leasing and marketing of 800 West Fulton, 10 South LaSalle, One South Dearborn, 225 West Washington, and Monroe Plaza. Mark has completed transactions totaling over 3,000,000 square feet over the last five years.

Clients Represented

  • Aspen Dental, 800 W Fulton – 205,000 SF
  • Citadel/Dearborn Capital Group, 131 South Dearborn – 223,000 SF
  • Perkins Coie/Dearborn Capital Group, 131 South Dearborn – 101,000 SF
  • The Feil Organization – 10 South LaSalle, 645 North Michigan & 730 N Franklin
  • Thor Equities – 800 West Fulton
  • Vanderbilt Partners & Starwood Capital Group – One South Dearborn
  • Kinship Capital – 225 West Washington
  • Accesso Partners – 200 & 230 West Monroe


  • Bachelor of Science in Finance, Villanova University

Affiliations & Designations

  • The Chicago Office Leasing Brokers Association (COLBA)
  • NAIOP Broker Transaction of the Year, 2020
  • Property Representative of the Year Award, 2012
  • Finalist for Property Representative of the Year Award, 2014
  • Top 25 Producer for Cushman & Wakefield