Boskalis sets stock dividend conversion rate at 1:23.5

Papendrecht, 31 May 2018 On 9 May 2018 the dividend of Royal Boskalis Westminster N.V. (Boskalis) for the financial year 2017 has been determined at EUR 1.00 per ordinary share. This dividend shall be distributed in the form of ordinary shares, unless a shareholder opts to receive the dividend payment in the form of cash. With the dividend distribution as stock, shareholders will receive one ordinary share per 23.5 dividend rights of ordinary shares. The conversion rate has been based on the volume weighted average stock price of Boskalis shares traded on Euronext Amsterdam over the period 29, 30 and 31 May of EUR 23.5360. From 5 June 2018 the dividend will be payable in cash and ordinary shares arising from the conversion of dividend rights will be delivered. Cash distribution will be subject to deduction of dividend tax as required by law. Royal Boskalis Westminster N.V. is a leading global services provider operating in the dredging, maritime infrastructure and maritime services sectors. The company provides creative and innovative all-round solutions to infrastructural challenges in the maritime, coastal and delta regions of the world with services including the construction and maintenance of ports and waterways, land reclamation, coastal defense and riverbank protection. In addition, Boskalis offers a wide variety of marine services and contracting for the oil and gas sector and offshore wind industry as well as salvage solutions. Furthermore, Boskalis has a number of strategic partnerships in harbor towage and terminal services (Kotug Smit Towage, Keppel Smit Towage, Saam Smit Towage and Smit Lamnalco). With a versatile fleet of more than 900 vessels and floating equipment and 10,700 employees, including associated companies, Boskalis operates in 90 countries across six continents. This press release can also be found on our website www.boskalis.com.