Arcadis NV — M&A Activity 2010

Aug 27, 2010

ARCADIS NV Nieuwe Stationsstraat 10 P.O. Box 33 6800 LE Arnhem The Netherlands Tel +31 26 3778 292 Fax +31 26 4438 381 www.arcadis.com

PRESS RELEASE

ARCADIS EXPANDS DESIGN SERVICES IN CHINA

August 27, 2010 – ARCADIS (EURONEXT: ARCAD), the international design, consulting, engineering and management services company, announced that its subsidiary RTKL has acquired AHS International, the Beijing-based architecture practice that specializes in hospital, laboratory and medical facility design. The acquisition builds on RTKL's already well-established presence in Asia and allows the practice to provide a wider range of design, planning and technical services throughout China.

"This is a significant strategic move for RTKL and a tremendous opportunity for ARCADIS," said ARCADIS Chief Executive Harrie Noy. "It not only strengthens our presence in China but is well-timed to capitalize on the country's commitment of providing world-class healthcare to its entire population. RTKL and ARCADIS are now uniquely positioned to respond to this challenge."

RTKL and AHS have teamed on the design of the Shanghai Changzheng New Pudong Hospital. At 2,200 beds and 361,000 m2 , this will be the largest new medical facility built in China in a single phase. The experience has been a positive one and the two practices realized they shared a commitment to quality design and a spirit of collaboration.

"RTKL and AHS are a proven partnership," said Lance Josal FAIA, RTKL President and CEO. "We can now provide that tested relationship on a larger stage. The acquisition will also help our long-term strategy for growth. It gives us a strong presence in Beijing, offers our clients a deeper pool of services in China, and it adds an established presence and reputation in the healthcare market. But, most importantly, it brings on board Kai Wang and his team, a recognized leader in the design of hospitals and laboratories throughout China."

Kai Wang AIA, founder and managing principal of AHS International, will join RTKL as a vice president based in the Beijing office. Wang, along with his partner June Chen, were educated in China and the United States and together formed AHS in 2005. Since then, AHS has grown to some 43 professionals in Beijing and Shanghai.

"There is a premium on knowledgeable healthcare design in China," said Wang. "Now, as part of RTKL and the even larger ARCADIS network, we can bring our knowledge to a wider portfolio of clients and respond to the market's tremendous demand for world-class architecture and technology."

The healthcare market in China is growing rapidly—in size and complexity. In 2009, the government announced its plans to provide 90 percent of the Chinese urban and rural population with healthcare coverage and to make an initial investment starting in 2010 of 850B RMB (US \$125B) within a three-year period. This investment will largely go to the

construction of national healthcare centers of 2,000+ beds, regional centers of 1,000 beds and specialized hospitals of 500 beds. This is the core business of RTKL's Healthcare Practice, which consistently ranks among the top ten providers of design, planning and technology services in the United States.

For more information please contact: Mark Zellenrath of ARCADIS at +31-26-3778348 or outside office hours at +31-6-50736265, or e-mail: mark.zellenrath@arcadis.com.

About RTKL:

RTKL is a worldwide architecture, engineering, planning and creative services organization. Part of the ARCADIS global network since 2007, RTKL specializes in providing its multi-disciplinary services across the full development cycle to create places of distinction and designs of lasting value. RTKL works with commercial, healthcare, public clients on projects around the globe. Visit us at: www.RTKL.com

About ARCADIS:

ARCADIS is an international company providing consultancy, design, engineering and management services in infrastructure, water, environment and buildings. We aim to enhance mobility, sustainability and quality of life by creating balance in the built and natural environment. ARCADIS develops, designs, implements, maintains and operates projects for companies and governments. With 15,000 employees and EUR 1.8 billion in revenues, the company has an extensive international network that is supported by strong local market positions. Visit us at: www.arcadis.com

About AHS International:

AHS International (Architecture for Healthcare and Science research facility) is a dedicated architectural design/consulting firm for modern medical/healthcare/lab facility planning, design, project investment consulting and project management consulting. Established in Atlanta, Georgia, and registered in Beijing, China, in 2005, AHS sets its vision to create modern and functional healthcare/lab facilities with international standards. By introducing advanced healthcare/lab facility design concepts and techniques to China, AHS provides its clients with design excellence, quality services and innovative solutions.