Mark A. Buth

Mark A. Buth

EVP & Managing Director Leasing Services


    Mark Buth is executive vice president of MB Real Estate’s Leasing Services division and serves on the firm’s Executive Committee. Mark oversees leasing activity for MB Real Estate’s 7 million square foot leasing portfolio, advises clients on investments, and identifies new business opportunities for the company.

    A prominent member of the Chicago real estate community for more than 25 years, Mark has completed over 800 lease transactions that represent approximately 9 million square feet of space. In the last twelve months alone, he has been involved in closing 500,000 square feet of transactions, most notable of which include renewal and expansions for Omnicon (292,000 SF), renewal and expansion for QRM (107,000 SF), a sublease for SC Johnson (50,000 SF), a new deal with Ulta Cosmetics (23,000 SF), and a relocation and renewal for the Academy of Nutrition and Dietetics (20,000 SF).

    Throughout his career, Mark has consistently created value for distinguished real estate owners and investors, such as CB Global Investors, Beacon Capital Partners, GE Asset Management, MetLife, Callahan Capital Properties, and Ivanhoe Cambridge.

    Prior to joining MB Real Estate, Mark was a senior vice president at The Walken Company, where he oversaw leasing activities at One North Wacker, 29 North Wacker, and One South Wacker Drive where he increased occupancy from 45 to 95%. He also served as a senior vice president at Walken-Tinsley Interests, where he established its build-to-suit division and developed more than 75 assisted-living facilities valued at more than $350 million for a publicly traded client. 


    • Bachelor of Business Administration – Real Estate Finance, University of Wisconsin–Madison
    • Master of Science – Real Estate Appraisal and Investment Analysis, University of Wisconsin–Madison

    • Licensed real estate broker in the state of Illinois
    • LEED Accredited Professional
    • Three-time finalist for the Chicago Sun-Times/Greater Chicago Food Depository Broker of the Year
    • Two-time finalist for the NAIOP Chicago Office Transaction Award of Excellence
    • 2009 Chicago Sun-Times Greater Chicago Food Depository Real Estate Awards Redevelopment of the Year finalist

    • Chicago Office Leasing Brokers Association (COLBA)
    • Greater Chicago Food Depository
    • Real Estate Action Committee for The City of Hope
    • Urban Land Institute (ULI)
    • Wisconsin Real Estate Alumni Association (WREAA)

    • American Cancer Society
    • Beacon Capital Partners
    • Callahan Commercial Properties
    • Capital Properties
    • The Chetrit Group
    • Credit Suisse First Boston
    • Fidelity Investments
    • Gaw Capital
    • GE Asset Management
    • HNA Holding Group
    • Ivanhoe Cambridge
    • Loeb Partners Realty
    • Madison Capital
    • Merrill Lynch
    • Metropolitan Life Insurance
    • Principal Financial Group
    • Prudential Financial Inc.
    • RREEF Funds

    • 10 and 120 South Riverside
    • 20 West Kinzie
    • 29 North Wacker
    • 30 West Monroe – The Inland Steel Building
    • 70 West Madison
    • 181 West Madison
    • 200 West Jackson
    • 205/225 North Michigan – Michigan Plaza
    • 208 South LaSalle
    • 221 North LaSalle
    • 230 West Monroe
    • 328 North Carpenter
    • 333 North Michigan
    • 500 West Madison
    • 525 West Van Buren
    • 541 North Fairbanks
    • 550 West Washington
    • 939 West Fulton
    • One North Dearborn
    • One North LaSalle
    • One North Wacker
    • One South Wacker