Allen & Overy (A&O) has taken a lead role alongside a trio of US firms on a $1.3bn (£900m) deal which will see tech company Misys offload its healthcare software portfolio in the US.

The deal, which also handed roles to US firms Sidley Austin, King & Spalding and Winston & Strawn, will see Misys sell the majority of its 55% stake in US healthcare software company Allscripts to rival provider Eclipsys.