Results Third Quarter 2008 CONFERENCE CALL, NOVEMBER 12, 2008, 16:00 CET Harrie Noy Chief Executive Officer Imagine the result

Higher revenues Profitability stable Gross revenues Q3 +5% Good organic growth despite slowing growth U.S. and U.K. markets EBITA up 8%, high margin maintained Net income from operations stable despite currencies and higher financing charges Outlook FY2008: +10% Focus on cost control and sales, anticipating changing conditions

Gross revenues Ebita Income 1) EPS 1,2) _  _ 5% 8% 0% Income Q € 16.3 million ) Net income from operations before amortization and non- operational items 2) In 2008 based on 60.6 million shares outstanding (2007: 61.1 million) Currency -5%, especially decline of US dollar, British pound

Gross revenues Ebita Income 1) EPS 1,2) , _  _ 15% 17% 11% 12% Income 9 months 2008 € 47.8 million , ) Net income from operations before amortization and non- operational items 2) In 2008 based op 60.5 million shares outstanding (2007: 61.2 million) Currency -6%, especially decline of US dollar, British pound

Organic growth NR stays at good level

Main facts  Till now impact credit crisis limited  UK property market remains difficult  Slowing growth in U.S. environmental market, partly due to completion large projects  Nevertheless organic growth NR 8%  Margin maintained at 10.7% (Q32007: 10.8% )  Dutch infra solid; Poland, Czech strong  Brazil and Chile continue strong growth  SET (Italy) acquired, Copijn divested Figures relate to third quarter

Margin improved further In € millions 69%Increase 7.8% Margin 12% 6% 0% 8.9% 43% 10.1% 36% 10.3% 17% EBITA Q3YTD and margin 5.5%

EBITA advanced 17% Q3YTD In € millions + 8% -/- 6% Organic increase mainly coming from U.S. en other Europe (excl UK project management) +15%

Some financial details Q3 Carbon credits contribute € 1.0 million to EBITA (2007: € 0.6 million) Carbon credits from two landfills in Brazil; approx. 750K ton per year price EUR; 1/3 for Logos Again large impact derivatives on financing charges Excl this impact financing charges increase to € 5.4 million (2007: € 2.6 million) as a result of acquisitions, higher interest rates and impact from Brazilian loans

ARCADIS financially healthy Balance sheet healthy: Net debt/Ebitda end 08 approx. 1.3 USD 350 million long term financing; repayment March 2011 – Jan 2015 End Q3 working capital up to 16.3% (Q307: 13.7%) due to reorganization billing in US and Poland Cash flow expected to recover in Q4

The business lines Infrastructure Environment Buildings

Growth in all business lines Figures relate to first nine months 2008; (..) = organic growth

INFRASTRUCTURE 9 MONTHS 2008: +3% organic:+5%; acquisitions:0%; currency:-2%  Organic growth negatively impacted by earlier decline land development in U.S.  Excluding this effect organic growth 7%  Netherlands, Poland, Czech strong  Brazil and Chile driven by mining and energy  In Q3 accelerated growth in U.S. water market; this year $60 million orders from New Orleans  Project management contributed in U.K.

ENVIRONMENT 9 MONTHS 2008: +15% organic:+9%; acquisitions:+16%; currency:-10%  Contribution acquisitions from LFR & Vectra  In Q3 slowing growth in the U.S. due to industrial clients economic woes  Combined with completion of projects with large subcontracting: light organic decline  Net revenue saw organic increase  Already $55 million in new GRiP® work YTD  In most of Europe and Brazil solid growth

BUILDINGS 9 MONTHS 2008: +39% organic:+6%; acquisitions:+38%; currency:-5%  Acquisitions: RTKL and APS mid 2007  Continued strong growth in most European countries in management services  RTKL: solid growth from non-commercial and international work  U.K. lower due to decline in commercial real estate market, partly offset by infra & ME  Five year facility management contract with Van Lanschot – the first bank contract

Outlook

Outlook per business line Infrastructure – relatively stable Government investments in Europe & U.S. to boost economy Long term investment programs, e.g. Central Europe Climate change fuels water management: e.g. Dutch Delta plan New Orleans solid basis for growth in US water market Environment – a healthy foundation by sustainability and regulations Focus on sectors with continued high demand: oil & gas, utilities Cost effective solutions, vendor reduction and outsourcing: > market share Interest in GRiP® increases, both in US and Europe In US, environment & climate change on political agenda Buildings – refocusing sales efforts Delays and postponements in commercial projects in UK and US RTKL focuses on US non-commercial and on international Project management for infra and Middle East Demand for FM is expected to grow

Outlook 2008 Economic conditions deteriorate Sustainability, climate change, urban renewal, mobility and energy offer ample opportunity Well positioned with a strong backlog and intensified sales efforts Cost control and focus on higher added value to maintain margin Looking for acquisitions with more prudence Expected increase net income from operations 2008: 10% (Barring unforeseen circumstances) ARCADIS Building Global Leadership

Thank you