Sanja Partalo

Sanja Partalo is the Co-Founder and Managing Partner of S4S Ventures, an early-stage venture capital firm. Backed by Sir Martin Sorrell and Daniel Pinto, she is raising a $150M fund to invest in digital transformation across the marketing and media sectors. Previously, Partalo served as the Global Head of Strategic Development and Partnerships at WPP, where she oversaw a portfolio exceeding $1B and managed relationships with major technology platforms including Google, Meta, and Amazon. During her tenure, she directed strategic investments in startups such as Gimlet and SuperAwesome, which were subsequently acquired by Spotify and Epic Games. She holds board director positions at several companies, including Tenovos, Stitch, and A-Frame Brands. Her current investment focus centers on early-stage advertising technology, marketing software, and data infrastructure startups navigating shifts in artificial intelligence and consumer privacy.