Offshore law firm Mourant Ozannes is the leading offshore adviser to FTSE 100 clients according to a special, 10th Anniversary edition of the Corporate Advisers Rankings Guide, published today. As well as advising more FTSE 100 companies than any other offshore law firm, the guide also ranks Mourant Ozannes as the only offshore firm in the top 25 advisers for total market capitalization of stock market clients, placing it alongside the world's leading, international law firms. Mourant Ozannes appears at number 15 in the rankings with the next offshore law firm at 35th place. Partner Paul Martin commented: "The latest announcement from Corporate Adviser Rankings Guide, an established and respected publication, is encouraging to read. Research shows Mourant Ozannes to be a trusted adviser to some of the world's largest and most successful companies. Our success is testament to the strength in depth of our teams and a commitment to delivering exceptional client service.  We are delighted to appear alongside leading global law firms and to be recognised for our work with such high calibre clients." The news from Corporate Adviser Rankings follows a recent survey by The Lawyer magazine published at the end of 2015, in which Mourant Ozannes also emerged as the leading offshore firm for relationships with FTSE 250 clients. Analysing three years' worth of data comprising litigation, deals and panel information, the research by The Lawyer ranked firms based on their long term relationships with the companies that make up the midcaps. Mourant Ozannes ranked 17th among magic circle firms such as Slaughter and May, Linklaters, DLA Piper and A&O with the next offshore law firm ranking 39th in the tables. The Corporate Advisers Rankings Guide is released quarterly and publishes research in the form of rankings tables for auditors, financial advisers, financial PR advisers, law firms, registrars and stock brokers, based on their client numbers and their client market capitalisation. The research relies on a number of primary sources. Market capitalization figures for the latest research have been produced using closing share prices on 31 November 2015.