IAG is incorporated as a Sociedad Anónima in Spain, where the company board meetings are held, and is domiciled in Spain for tax purposes.[45][46][47][48] IAG has a primary listing on the London Stock Exchange and has been a FTSE 100 constituent since 24 January 2011.[49][50] It has secondary listings on the Madrid, Barcelona, Bilbao and Valencia stock exchanges,[51][52] and has been a constituent of the IBEX 35 index since 1 April 2011.[53]