Small island states were able to obtain some remarkable achievements in the climate change negotiations by building a cohesive coalition, the Alliance of Small Island States (AOSIS). Yet, This working paper argues that this cohesiveness has come under stress by a growing fragmentation of the UNFCCC regime. The multiplication of issues on the climate agenda and the increasing number of negotiation groups make it more difficult for AOSIS to speak with one voice.It compares the activities and positions of AOSIS as a group, and of individual AOSIS members, over three distinct periods in the climate change regime: 1995-2000; 2001-2005; 2006-2010 and looks in more detail at two issue areas – mitigation and adaptation as well as Land Use, Land-Use Change and Forestry (LULUCF) and Reduced Emissions from Deforestation and Forest Degradation (REDD). The analysis indicates that fragmentation has negatively affected the Alliance and that submissions as a coalition have declined in relative terms, and differences in single issue areas have become more pronounced.