Over the past few years the Malaysian government has embarked on several bilateral and regional negotiations to conclude major trade and investment treaties ?ith large economies outside of ASEAN, including the proposed Trans-Pacific Partnership with the US and other countries. Given the far-reaching implications that these negotiations can have and the high stakes and political complexities involved, advocating on investment treaties requires developing effective alliances and well thought-out strategies. In 2013, 52 non-governmental organisations, trade associations and civil society groups established a coalition to raise public awareness and develop advocacy about the Trans-Pacific Partnership. This publication distils lessons learned from that experience.