The study analyses the experiences that the 25 developing countries participating in the LECB Programme have had in engaging the private sector in climate change mitigation activities. The report draws upon existing analysis on important factors for mobilising private-sector financing, as well as data based on twenty semi-structured interviews with national experts from Chile, Vietnam, Mexico, Lebanon and Ghana, LECB staff, representatives from the private sector, several international NAMA practitioners, and on an on-line survey covering all countries in the LECB Programme. The study shows that there is great interest in engaging the private sector in the development and implementation of mitigation strategies and programmes (LEDS and NAMAs). However, there has been little concrete experience of this nature to date. The study presents the challenges, success stories and lessons learnt based on the current experience. It provides practical recommendations on engaging the private sector, which would be of interest to climate-change mitigation practitioners, financing organizations, and international institutions involved in capacity building or in the design and implementation of mitigation actions in developing countries. Lessons learned here may also be of interest to climate change negotiators.