X0202 4 2005-05-13 0 0000090185 SIGMA ALDRICH CORP sial 0001203147 METEER JAMES W 0 1 0 0 VP, Quality Common Stock, $1 Par Value 55704.26 I By Company 401(K) Plan Amount disclosed is based on a plan statement dated May 12, 2005 Debbie Bockius 2005-05-13