This document contains summaries of biographies for four individuals: Fajar Anugerah is a senior partner at an impact investment company in Indonesia with experience managing sustainability programs. Melany Tedja is a finance consultant for social and environmental projects, specializing in climate economics. She has worked on development projects with international organizations. Dr. Jordan Kassalow is an optometrist and founder of VisionSpring, which provides affordable eyeglasses in developing countries. Sam Goldman and Ned Tozun are co-founders of d.light, which delivers affordable solar-powered solutions globally. They discuss the company's social impact and return on investment.