SHARE has applied outcome mapping as an approach to plan, monitor and evaluate its research into use work. Outcome mapping (OM) is an iterative approach to project planning, monitoring and evaluation which seeks to identify, engage and work with the key stakeholders who are likely to help foster transformative change. This learning report documents SHARE’s OM experience and presents key areas of learning; resourcing OM, context and culture, analysing OM data, adaptive approaches and ways of working. It also makes recommendations for other implementers using OM or OM principles in programmes.