Leading Swiss independents Homburger and Lenz & Staehelin bagged the lead advisory roles in September in the largest takeover to date of a Swiss company by an overseas investor.

The record-breaking transaction saw German pharmaceutical giant Merck, advised by Zurich-based firm Homburger, acquire Swiss biotech business Serono in a deal valued at €11.5bn (£7.7bn). The Swiss law deal is expected to complete in January.