U2 frontman Bono is set to become the richest man in rock when Facebook shares go on sale later today.

His Elevation Partners equity firm bought 2.3% of the social media company in 2009 for $90m, and that investment will be worth over $1.5bn – that’s £940m – by close of business today.

That will make the singer and anti-poverty campaigner far more wealthy than former Beatle Paul McCartney, who’s topped the rock rich list for years and is currently valued at £665m.