Financial calendar

Corporate events 2010

Date	Event
11 March 2010	Publication Annual Figures 2009 - analysts meeting audiowebcast 14:00
18 May 2010	Publication Q1 Figures 2010 - approximately 14:00
18 May 2010	Annual General Meeting of Shareholders / audiowebcast - 10:00
19 August 2010	Publication Half Year Figures 2010
11 November 2010	Publication Q3 Figures 2010

Dividend 2010

20 May 2010	Ex-dividend rate
24 May 2010	Dividend record date
25 - 3 June 2010	Option period

3 June 2010	Determination and publication of conversion rate for stock dividend based on the volume-weighted average price (‘VWAP’) of all on NYSE Euronext Amsterdam traded depositary receipts for shares Grontmij on 1-3 June 2010
8 June 2010	Dividend payment date and delivery of (depositary receipts for) shares

Roadshows 2010

To be updated in March


Closed periods
The three weeks prior to announcement of the quarterly and half year financial results and the period of two months prior to the publication of the full year results are considered to be the closed periods. Meetings with analysts, presentations to the latter and to investors (institutional or otherwise) and direct consultations with such investors shall not occur in these closed periods.

Closed periods 2010	Event
from 10th January up to and including 10th March 2010	Publication annual results 2009
from 26th April up to and including 17th May 2010	Publication Q1 results 2010
from 28th July up to and including 18th August 2010	Publication half year results 2010
from 20th October up to and including 10th November 2010	Publication Q3 results 2010