The traditional focus of the IDA symposium series is on end-to-end intelligent support for data analysis. In 2010, the series re-focused to support papers that go beyond established technology and offer genuinely novel and "game- changing" ideas. The symposium aims to provide a forum for inspiring research contributions that might be considered preliminary in other leading conferences and journals, but that have a potentially dramatic impact. To facilitate this, IDA 2016 will feature two tracks: a regular "Proceedings" track, as well as a "Horizon" track for early-stage research of potentially ground-breaking nature. Submissions to this latter track will not be published in the proceedings, to allow authors to present their most adventurous and controversial research ideas without running the risk of compromising any subsequent publications. The IDA symposium, which is A-ranked according to ERA, is open to all kinds of modeling and analysis methods, irrespective of discipline. It is expected to be an interdisciplinary meeting that seeks abstractions that cut across domains.