Mark Walker
Co-Founder & Chairman & CEO
BA 1998, Life Member, College of Liberal Arts

Keith Smith
Co-Founder & President
BA 1991, College of Liberal Arts

Diana Diaz
CAO & Executive Vice President
BBA 1985, McCombs School of Business

Direct Digital Holdings, owner of operating companies Colossus SSP, Huddled Masses, and Orange 142, brings state-of-the-art sell- and buy-side advertising platforms together under one umbrella company. Direct Digital Holdings’ sell-side platform, Colossus SSP, offers advertisers of all sizes extensive reach within general market and multicultural media properties.  
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