70% of Boskalis Shareholders Elects Stock Dividend

Royal Boskalis Westminster N.V. (Boskalis) announces that 70.19 percent of the shareholders have elected a stock dividend distributed in the form of ordinary shares. As a result, 3,284,415 new ordinary shares will be issued today. The admission of these shares to trading on NYSE Euronext Amsterdam is required under the rules of Euronext Rulebook Book I. The admission will take place on 4 June 2013. With the admission, the total number of the ordinary shares of Boskalis is 120,265,063. An information document as referred to in articles 5:3 sub d and 5:4 sub e of the Financial Markets Supervision Act (Wet op het financieel toezicht) is simultaneously with this press release made available through the website of Boskalis (www.boskalis.com) and hence no obligation to publish a prospectus in connection with this admission exists.