In their Series D, Rokt closes $80 million dollars of funding from firms such as TDM Growth and Square Peg, raising their valuation to more than $400 million.

Joining the board of Martin Sorrell's S4 Capital, Elizabeth Buchanan brings experience from starting agencies, global brands, and founding the startup Rokt where she is currently Chief Commerical Officer.

Elizabeth Buchanan joins the board of S4 capital as a non-executive director. As a board member of Vital Voices Global Partnership, a founder of The White Agency, and having worked previously at WPP AUNZ and OMD Worldwide, Elizabeth brings a global perspective to the organization.