This working paper reveals a complex and fragmented landscape of intergovernmental cooperation on climate change mitigation efforts. Surveying ninety-three intergovernmental initiatives, on first glance, geographical participation appears broad. However, detailed analysis shows representation from the Global South is critically low across key sectors. This paper highlights how initiatives are largely dominated by developed countries and the top emitters from each sector, underscoring the opportunity for improved country participation from the Global South across key underrepresented sectors.