%0 Journal Article %T On the topology of initial data sets with higher genus ends %A Kenneth L. Baker %A Gregory J. Galloway %J Mathematics %D 2014 %I arXiv %R 10.1007/s00220-015-2309-9 %X In this note we study the topology of 3-dimensional initial data sets with horizons of a sort associated with asymptotically locally anti-de Sitter spacetimes. We show that, within this class, those initial data sets which contain no (immersed) marginally outer trapped surfaces in their interior must have simple topology: they are a product of a surface and an interval, or a mild variation thereof, depending on the connectedness of the horizon and on its genus relative to that of the end. The results obtained here extend results in [11] to the case of higher genus ends. %U http://arxiv.org/abs/1403.0988v2