Royal Boskalis Westminster N : Koninklijke Boskalis Westminster N.V., - Boskalis completes EUR 100 million share buyback program

Royal Boskalis

Westminster N.V.

PO Box 43

3350 AA Papendrecht

The Netherlands

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FOR FURTHER INFORMATION

Investor relations:

Martijn L.D. Schuttevâer [e-mail]

Press:

Arno Schikker [e-mail]

T [phone]

PRESS RELEASE

Boskalis completes EUR 100 million share buyback program

Papendrecht, 16 September 2021

Royal Boskalis Westminster N.V. (Boskalis) announces the completion of its EUR 100 million share buyback program. During the program, a total number of 4,742,928 shares were repurchased at an average price of EUR 21.08 per share.

The program commenced on 18 March 2019 and was completed on

15 September 2021 including a temporary suspension in 2020 due to COVID- 19 related uncertainties during that period. The program was executed on behalf of Boskalis by ING Bank N.V. A complete overview of all individual transactions can be found on www.boskalis.com.

The buyback program was aimed at reducing the issued share capital. The current issued share capital of Boskalis consists of 130,277,832 ordinary shares of which 952,934 is treasury stock held by the company.

This is a Boskalis press release on the grounds of article 17 paragraph 1 of the European Market Abuse Regulation (596/2014).

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 core activities such as coastal defense, riverbank protection and land reclamation Boskalis is able to provide adaptive and mitigating solutions to combat the effects of climate change, such as extreme weather conditions and rising sea levels, as well as delivering solutions for the increasing need for space in coastal and delta regions across the world. The company facilitates the development of offshore energy infrastructure, including renewable wind energy. Boskalis is furthermore active in the construction and maintenance of ports, waterways, access channels and civil infrastructure, thus helping to facilitate trade flows and regional socioeconomic development. In addition, Boskalis is a global marine salvage expert and has a number of strategic partnerships in harbor towage and terminal services (Keppel Smit Towage and Smit Lamnalco). With a versatile fleet of more than 700 vessels and floating equipment and 9,600 employees, including associates, Boskalis is creating new horizons around the world.

This press release can also be found on our website www.boskalis.com.