Vox Capital was the first impact investing fund in Brazil, if not one of the first venture capital funds as well. Founded in 2009, Vox provides early-stage capital for companies offering innovative and scalable solutions to enhance the lives of low-income Brazilians, while aiming to simultaneously generate attractive market-rate financial returns for investors. This case examines the evolution of Vox Capital, across understanding the landscape, launching, raising funds, selecting investees, structuring deals, building investee capacities, tracking performance, developing internal systems, and advancing the field of impact investing.