The Summer Institute of 2014 was on the astrophysics of the intracluster medium (ICM) and protoplanetary disks. It was a two-week program based around two workshops, namely Non-ideal MHD, Stability, and Dissipation in Protoplanetary Disks and 3rd ICM Theory and Computation Workshop.
The Summer Institute of 2011 was on Strings, Gauge Theory and the LHC. It was held for a two week period, from August 22nd until September 2nd, 2011.
The Summer Institute of 2009 focused on new developments in computational astrophysics. It was divided into two parts, a Summer School on Stellar Collapse, Compact Objects, Supernovae, and Gamma-Ray Bursts and a workshop on Microphysics in Computational Relativistic Astrophysics giving in total a two-week intense period that brought in renowned speakers and researchers in these fields. The Summer School gave, among other aspects, the PhD-students a chance to learn "hands-on" how to set up numerical simulations of astrophysical events.
The Summer Institute of 2008 (June 16 - July 4) was a joint NBIA-Nordita program that brought together people working in different but related fields. The title was Ultracold Atoms and Quark-Gluon Plasmas and the meeting stretched over three weeks with new topics taken up for presentation every morning, followed by work and discussions in the afternoons.
The Summer Institute of 2007 was about cosmology. It was divided into three parts: First Stars (April 16-20, 2007), Dark Matter (August 20-24, 2007) and Dark Energy (August 27-31, 2007).
The Summer Institute of 2006 was entitled Frontiers in Theoretical Particle Physics.