Freshfields Bruckhaus Deringer has won a role alongside Gibson Dunn & Crutcher on Hewlett-Packard’s $1.5bn (£972m) acquisition of security software maker ArcSight, reports The Am Law Daily.

Russell Hansen, the partner-in-charge of Gibson Dunn’s Palo Alto office, is leading the US firm’s team on the deal, while Freshfields partner Alan Ryan and senior associate Martin McElwee are serving as European antitrust counsel.