 The company then re-branded itself and its subsidiary companies as SSE, however the "Hydro" name was retained despite it no longer being a trading name.The arena was designed by the London-based architects Foster + Partners and officially opened on 30 September 2013, with a concert by Rod Stewart.In 2016 the arena handled 751,487 ticket sales; making it the eighth-busiest music arena in the world in terms of ticket sales.