Results Third Quarter 2006Harrie Noy, CEO Analyst Conference Call, November 15, 2006

Infrastructure, environment, facilities

Excellent third quarter 2006

Gross revenue 32% higher, strong organic growth at 12%

Net income from operations 63% higher

Strong results across the board, geographic and per service area

Expected increase net income from operations raised to 40 to 45%

Margin considerably higher at 9.6% compared to 8.0% last year

Target margin increased to 10% (was 8%)

ARCADIS is now operating higher in the value chain

Gross revenue

Ebita

Ebita recurring

Net income

Net income per share 2)

Net income from operations1)

Ditto per share 1,2)

1) Before amortization and non-operational items

2) In 2006 based on 20.2 million shares outstanding (2005: 20.2 million)

2006

311

19.6

19.6

10.7

0.53

12.3

0.61

2005

236

13.1

13.1

6.3

0.31

7.5

0.37

_ _

32%

50%

50%

70%

70%

63%

63%

Income third quarter 2006: € 12.3 million

Gross revenue

Ebita

Ebita recurring

Net income

Net income per share 2)

Net income from operations 1)

Ditto per share 1,2)

1) Before amortization and non-operational items

2) In 2006 based on 20.2 million shares outstanding (2005: 20.2 million)

2006

892

54.9

54.9

30.3

1.50

33.5

1.65

2005

692

38.5

36.4

20.8

1.03

20.8

1.02

_ _

29%

43%

51%

46%

46%

61%

61%

Income first nine months 2006: € 33.5 million

Main developmentsFigures refer to first nine months 2006

Strong organic growth in the Netherlands: >10%– Considerable contribution from facility management contract DSM/Sabic

– Significant investment in rail infrastructure renewal/maintenance

– More PPP initiatives; outsourcing by Ministry Public Works

– Strong demand for project management and cost consultancy

Continued growth in the U.S. and Brazil– Organically in U.S. 12%; in Brazil >20%

Strong contributions from recent acquisitions– Especially BBL (U.S.) and AYH (U.K.)

After delays, start up of major infrastructure projects in Poland

Integration of BBL is progressing well

0%

5%

10%

15%

20%

25%

30%

2004 2005 Q1 2006 Q2 2006 Q3 2006 Q3 YTD2006

Organic

Acquisitions

Total (excl.Currency effect)

Currency -3% +1% 5% 1% -1% 2%

Selling prices +1% -0% 0% 0% 0% 0%

Growth accelerates

33%

Considerable growth of EbitaFirst nine months 51% on recurring basis

0 5 10 15 20 25 30 35 40 45 50 55 60

EBITA 9M 2006

Organic

Acquisitions/divestments

Currency

Recurring EBITA 9M2005

Non-recurring

EBITA 9M 2005

In € million

35%

2%

14%

38.5

54.9

36.4

Organic increase mainly from U.S., Brazil and Netherlands

Acquisitions to strengthen portfolio

Acquisitions 2006

• Environment NL

• Water Germany

• Management services UK

• Environment Belgium

• Walloon Belgium

• Management services US

Total

In Situ Technieken

Dresdner Grundwasser

Berkeley Consulting

Ecolas

BCT

PinnacleOne

Staff

10

20

100

60

65

230

485

GR in €

1.5

1.5

10

6

6

28

53

Cons. from

1.4.06

1.7.06

1.8.06

1.10.06

1.10.06

1.11.06

The service areas InfrastructureEnvironment Facilities

Strong organic growth in all service areasFigures relate to first nine months 2006; (..) = organic growth

Facilities +29% (+17%)

0

100

200

300

400

2003 2004 2005 2006

Infrastructure +5% (+8%)

0

100

200

300

400

2003 2004 2005 2006

Environment +77% (+8%)

0

100

200

300

400

2003 2004 2005 2006

Infrastructure45%

Facilities17%

Environment38%

• Organic growth strong at 8%• In Q3 accelerated growth in Netherlands and U.S. • Higher investment levels in Dutch market: rail, PPP, highways • U.S.: decline land development compensated by transportation

and water markets• Continued growth in Brazil: mining and energy

Infrastructure +5% (+8%)

Rail renewal market strong

• Overall revenue growth mainly coming from acquisitions (BBL)• Main contribution to organic growth of 8% from U.S. (GRiP®)• Softening in Q3 due to Poland and less subcontracting in U.S. • Good synergy from BBL & Greystone, inside + outside U.S.• U.K. and Netherlands strongest growth in Europe

Environment +77% (+8%)

GRiP® continues growth

ARCADIS Worldwide Project Consulting launched

• Facility management DSM/Sabic drives organic increase• Organic growth net revenue at 8%• Acquisition AYH strong growth contributor• Good demand for project management in NL, U.K. and Germany • Higher activity level in Belgium and France

Facilities +29% (+17%)

New Margin Targets

Target margin was exceeded in 2005: 8.2%

In 2000 margin target set at 8%

Strong margin improvement 2000-2005

From 6.0% to 8.2%, almost 40%

Portfolio changes & focus added value: structurally higher margin

So: evaluation of margins

Internal and external benchmarking

Improved consistency of margin calculation

Margin definition is unchanged (Ebita as a % of net revenue)

New margin target for ARCADIS set at 10%

Targets per service area Adjusted Margin target

margin 2005

Infrastructure 7.1% 8% - 9%

Environment 11.0% 12% - 13%

Facilities 7.0% 10% - 11%

Total 8.2% 10%

When portfolio changes, margins to be reviewed again

Focus remains on productivity improvements and higher value added

Reaching targets also depends on market conditions

Outlook

Outlook per service area

Infrastructure• Economic growth creates room for project funding • More PPP initiatives attract private sector investment• Demand for flood protection work is increasing

Environment • Growing interest in environment and sustainability• Synergy with BBL offers opportunities with multinationals • GRiP® continues to drive growth

Facilities• Economic growth drives project management demand• Facility management benefits from outsourcing trend• AWwPC launched for international real estate investors

Outlook for full year 2006 improved

ARCADIS is well positioned in markets that offer opportunity

Synergy contributes to growth

Integration BBL brought to conclusion in coming months

Integration BBL and SOX 404: approx. € 5 million out of pocket costs

Acquisition policy continued

Expected increase net income from operations raised to 40% to 45% (barring unforeseen circumstances)

ARCADIS is well on track

Thank you