X0202 3 2005-12-28 0 0000353020 INSITUFORM TECHNOLOGIES INC INSU 0001348389 Martin David A C/O INSITUFORM TECHNOLOGIES, INC. 702 SPIRIT 40 PARK DRIVE CHESTERFIELD MO 63005 0 0 0 1 Controller Common stock, $.01 par value 195 D Employee Stock Option (right to buy) 8.75 2007-11-14 Common stock, $.01 par value 1400 D Employee Stock Option (right to buy) 29.06 2011-03-19 Common stock, $.01 par value 2750 D Employee Stock Option (right to buy) 23.92 2012-02-25 Common stock, $.01 par value 4353 D Employee Stock Option (right to buy) 12.5 2010-03-07 Common stock, $.01 par value 2750 D Employee Stock Option (right to buy) 15.5 2011-05-25 Common stock, $.01 par value 5000 D Employee Stock Option (right to buy) 14.65 2012-05-05 Common stock, $.01 par value 4500 D The option became exercisable in two equal annual installments beginning on November 14, 2000. The option became exercisable in four equal annual installments beginning on March 19, 2001. The option became exercisable as to 1,088 shares on each of February 25, 2002, February 25, 2003 and February 25, 2004 and as to 1,089 shares on February 25, 2005. The option became exercisable as to 687 shares on March 7, 2003, as to 688 shares on March 7, 2004 and as to 687 shares on March 7, 2005. The option shall become exercisable as to 688 shares on March 7, 2006. The option is exercisable in four equal annual installments. The first two installments became exercisable on May 25, 2004 and May 25, 2005, and the next two installments become exercisable on May 25, 2006 and May 25, 2007. The option is exercisable in four equal annual installments. The first installment became exercisable on May 5, 2005 and the next three installments become exercisable on May 5, 2006, May 5, 2007 and May 5, 2008. /s/ David A. Martin 2006-01-05