A taxi ride in Buenos Aires gave Linda Rottenberg a question she could not shake: what happens to talented people when nobody expects them to build a company? Nearly three decades after she co-founded Endeavor, she is still widening the map.

Martina Tam is the CEO of Paper, the Montreal-based edtech company that runs one of North America's largest virtual tutoring services for K-12 districts. A Stanford and Wharton alum, she stepped in at the start of 2025 after operator stints at Brightwheel, MasterClass, and Eventbrite, and is now steering Paper's pivot toward its high-impact tutoring program, GROW.