Investor relations Share performance Calendar year 2005 Closing stock prices 2005 8 7 6 5 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan 2005 - Dec 2005 The table below sets forth the high and low closing prices during the periods indicated for our common shares on Euronext Amsterdam and for our ADSs on the NYSE. The quarters used are our financial quarters. Euronext Amsterdam NYSE (in EUR per common share) (in USD per ADS) High Low High Low First quarter 7.02 5.94 9.14 7.83 Second quarter 7.19 5.82 8.65 7.46 Third quarter 7.45 6.15 9.24 7.47 Fourth quarter 6.59 5.69 7.86 6.76 Calendar year 2004 First quarter 7.40 5.59 9.14 7.23 Second quarter 7.20 5.72 8.68 6.87 Third quarter 6.08 5.04 7.35 6.21 Fourth quarter 5.87 5.22 7.78 6.58 Calendar year 2003 13.60 2.47 14.33 2.95 Calendar year 2002 32.25 10.32 29.16 10.09 Calendar year 2001 37.39 29.13 33.07 26.70 Closing share prices for the most recent six months are as follows: Euronext Amsterdam NYSE (in EUR per common share) (in USD per ADS) High Low High Low October 2005 6.59 5.75 7.86 6.95 November 2005 6.45 5.69 7.51 6.76 December 2005 6.42 6.21 7.64 7.41 January 2006 6.81 6.27 8.15 7.68 February 2006 7.06 6.54 8.39 7.90 March 2006 7.34 6.48 8.80 7.79 222

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