62% of Boskalis shareholders elects stock dividend

Papendrecht, 9 June 2010 Royal Boskalis Westminster N.V. (Boskalis) announces that 62.4 percent of the shareholders have elected a stock dividend distributed in the form of ordinary shares. As a result, 2,322,974 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 9 June 2010. With the admission, the total number of the ordinary shares of Boskalis is 100,974,263. Pursuant to article 5:4 sub e of the Financial Markets Supervision Act (Wet op het financieel toezicht) there is no obligation to publish a prospectus in connection with the admission. This is an English translation of the Dutch press release. In the event of any disparity between the Dutch original and this translation, the Dutch text will prevail. Royal Boskalis Westminster N.V. is a leading global services provider operating in the dredging, maritime infrastructure and maritime services sectors. We provide creative and innovative all-round solutions to infrastructural challenges in the maritime, coastal and delta regions of the world including the construction and maintenance of ports and waterways, land reclamation, coastal defense and riverbank protection. We offer a wide variety of marine services through SMIT and we have positions in strategic partnerships in the Middle East (Archirodon) and in offshore services (Lamnalco). The company holds important home market positions in and outside of Europe. Boskalis has a versatile fleet of over 1,000 units and operates in over 65 countries across six continents. Including its share in partnerships, Boskalis has approximately 14,000 employees. Boskalis celebrates its 100^th anniversary in 2010. For further information please contact: Martijn L.D. Schuttevâer
Director of Investor Relations & Corporate Communications
Telephone:           +31 78 69 69 822 / +31 6 200 10 232
Telefax:                 +31 78 69 69 020               
E-mail:                   m.l.schuttevaer@boskalis.nl This press release can also be found on our website www.boskalis.com