This report summarizes the findings of the EngageHK initiative, which mapped Hong Kong's social sector ecosystem. Over 100 leaders from 80 organizations were interviewed across sectors like non-profits, social enterprises, foundations, and government. Key findings include a lack of collaboration between stakeholders that results in duplicated efforts. The report recommends fostering cross-sector dialogue and partnerships, focusing on both social and economic benefits, creating platforms to share ideas and resources, promoting transparency, and defining an enabling role for government. The goal is to build a more collaborative social ecosystem that increases collective impact for a sustainable future.