X0202 5 2006-12-31 0 0 0 0001104506 INSMED INC INSM 0001290682 Young Philip J C/O INSMED INCORPORATED 8720 STONY POINT PARKWAY, SUITE 200 RICHMOND VA 23235 0 1 0 0 CBO and EVP, Commercial Ops Common Stock 26732 D The amount of securities beneficially owned at December 31, 2006 includes 5,868 shares acquired on June 30, 2006 under the Amended and Restated Insmed Incorporated 2000 Employee Stock Purchase Plan. /s/ Philip J. Young 2007-02-14