The Sonisphere Festival was a touring rock music festival which took place across Europe between the months of June and August. The festival is owned by John Jackson and Kilimanjaro Live. It is jointly promoted by K2 and Kilimanjaro Live.
The festival has not taken place in the UK since 2014. Stuart Galbraith, CEO of Kilimanjaro Live, revealed in 2018 that Sonisphere will not return to the UK, due to financial issues.