Boskalis sets stock dividend conversion rate at 1:14.5

On 14 May 2009 the dividend of Royal Boskalis Westminster N.V. for 2008 was set at € 1.19 per ordinary share with a choice of stock or cash dividend.

With the dividend distribution as stock, shareholders will receive 1 new ordinary share per 14.5 dividend rights of ordinary shares. The conversion rate has been based on the volume weighted average stock price of Boskalis shares traded on NYSE Euronext Amsterdam over the period 3, 4 and 5 June 2009. The value of the stock dividend is virtually the same as the value of the cash dividend based on the 1:14.5 conversion rate and an average share price of € 17.39.

Both the cash and stock dividend will be made payable from Wednesday 10 June 2009. Cash distribution will be subject to deduction of dividend tax as required by law.