This is a very specialist sector. There are only 3 players worthy of mention. Bain & CoDeloitte M&A Strategy TeamPWC Strategy Group ( albeit this is less of a 'pure' consultancy as the others) If you ask about pharma in general, then its a different story. But as far as M&A advisory goes, oftentimes coming under the heading ' Commercial Due Diligence', this is the latest and greatest.