X0101 4 2003-05-29 0 0001003113 MOLECULAR DEVICES CORP MDCC 0001234058 MCCONNELL HARDEN M 1 0 0 0 Non-Employee Director Stock Option (Right to Buy) 16.91 2003-05-29 4 A 0 4000 0 A 2004-05-29 2013-05-29 Common Stock 4000 4000 D Shares vest as follows: 1,000 shares annually until fully vested. Total number of derivative securities beneficially owned following reported transaction: 34,500 /s/ McConnell, Harden 2003-05-29