This report, the sixth edition of Tracking the Field, builds on the Environmental Grantmakers Association’s (EGA) ongoing grant research from 2007 to 2015, deepening our understanding of trends and gaps in environmental philanthropy. The Tracking the Field report analyzes grant data from the supply side of funding, providing an avenue for EGA members to see where their grantmaking fits into the larger environmental movement and how they can optimize their grant dollars to be more strategic and effective.