ARCADIS Half Year 2009 Results Available Live Via Webcast

ARNHEM, The Netherlands -

Scheduled for Wednesday 5 August, 2009

10:00 AM (Eastern Time) 16:00 (CET)

ARCADIS (Euronext: ARCAD) intends to release its second-quarter/half-year results on Wednesday, August 5, 2009 before the opening of the NYSE Euronext Amsterdam exchange. On the same day, ARCADIS will hold an analyst meeting / conference call starting at 10.00 AM Eastern time. The event will be broadcast live via webcast. During these events, CEO Harrie Noy and CFO Ben van der Klift will provide insight into the results.

Viewers and listeners can access the events through a link in the investor relations section of ARCADIS’ website at www.arcadis-global.com/investors. Please allow 15 minutes prior to the event to visit the website to download and install any necessary software. An archived edition of the webcast will be available on the ARCADIS website.

About ARCADIS

ARCADIS is an international company providing consultancy, design, engineering and management services in infrastructure, environment and buildings, to enhance mobility, sustainability and quality of life. ARCADIS develops, designs, implements, maintains and operates projects for companies and governments. With more than 15,000 employees and EUR 2 billion in gross revenues, the company has an extensive international network that is supported by strong local market positions. Visit us on the internet: www.arcadis-global.com

PRN NLD

Source: ARCADIS NV

For more information, contact: Joost Slooten of ARCADIS NV at +31-26-3778604, outside regular office hours please call +31-6-2706-1880, email: j.slooten at arcadis.nl