In 2019, the Asian Development Bank (ADB) approved a $100 million loan contributing to climate finance for the $1.5 billion Shandong Green Development Fund Project. The fund introduces an innovative leveraging mechanism to catalyze private, institutional, and commercial capital for the development of climate-friendly infrastructure and business in Shandong Province, the People’s Republic of China. This paper sets out ADB’s experience in establishing scalable institutional structures for climate finance and presents current and prospective ADB roles in support of such structures and resultant value addition. The paper also discusses key considerations in designing the operational systems of such institutions and provides policy rationale for government action.