Symphony No. 9 is Philip Glass' ninth symphony. It was written between 2010 and 2011. It is written in 3 movements. It was commissioned by the Bruckner Orchester Linz, Carnegie Hall, and the Los Angeles Philharmonic Association.
It received its world premiere on January 1, 2012 at Brucknerhaus in Linz, Austria by the Bruckner Orchester Linz, conducted by Dennis Russell Davies. It premiered in the US at Carnegie Hall on January 31, 2012, with Dennis Russell Davies conducting The American Composers Orchestra. It received its West Coast premiere on April 5, 2012, with John Adams conducting the Los Angeles Philharmonic.