The 15^th Durban Forum on capacity-building was held on 9 June 2026 during the sixty-fourth session of the Subsidiary Body for Implementation. The theme of the Forum was capacity-building for holistic investment strategies, bankable projects and stakeholder engagement to strengthen the implementation of nationally determined contributions and national adaptation plans in developing countries, aligned with the focus area of the Paris Committee on Capacity-building for 2025–2026. This report provides information on the organization of the Forum and summarizes the presentations and discussions that took place