X0201 4 2004-02-10 0 0001003113 MOLECULAR DEVICES CORP MDCC 0001234058 MCCONNELL HARDEN M 1311 ORLEANS DRIVE SUNNYVALE CA 94089 1 0 0 0 Common Stock 2003-12-12 5 G 0 1200 0 A 252200 I By Trust Common Stock 2003-12-12 5 G 0 1200 0 A 253400 I By Trust Common Stock 2003-12-12 5 G 0 1200 0 A 254600 I By Trust Common Stock 2003-12-12 5 G 0 3600 0 D 251000 I By Trust Common Stock 2004-02-10 4 S 0 53 19.15 D 250947 I By Trust Common Stock 2004-02-10 4 S 0 200 19.19 D 250747 I By Trust Common Stock 2004-02-10 4 S 0 469 19.20 D 250278 I By Trust Common Stock 2004-02-10 4 S 0 400 19.20 D 249878 I By Trust Common Stock 2004-02-10 4 S 0 101 19.31 D 249777 I By Trust Common Stock 2004-02-10 4 S 0 677 19.37 D 249100 I By Trust Common Stock 2004-02-10 4 S 0 100 19.32 D 249000 I By Trust Non-Employee Director Stock Option (Right to Buy) 14.50 1999-09-13 2008-09-13 Common Stock 16500 16500 D Non-Employee Director Stock Option (Right to Buy) 21.62 2001-09-17 2011-09-17 Common Stock 10000 10000 D Non-Employee Director Stock Option (Right to Buy) 18.77 2002-05-23 2012-05-23 Common Stock 4000 4000 D Non-Employee Director Stock Option (Right to Buy) 16.91 2004-05-29 2013-05-29 Common Stock 4000 4000 D By the Jane McConnell 1999 Irrevocable Trust U/A DTD 12/21/99 By the Trevor McConnell 1999 Irrevocable Trust U/A DTD 12/21/99 By the Hunter McConnell Irrevocable Trust U/A DTD 12/21/99 Transfer 1,200 shares each to: Jane McConnell 1999 Irrevocable Trust U/A DTD 12/21/99, Trevor McConnell 1999 Irrevocable Trust U/A DTD 12/21/99 and Jane McConnell 1999 Irrevocable Trust U/A DTD 12/21/99 By the Harden M. McConnell and Sophia G. McConnell Trust Shares vest as follows: 2,500 annually until fully vested. Shares vest as follows: 1,000 annually until fully vested. Shares vest as follows: 1,000 shares annually until fully vested. /s/ McConnell, Harden 2004-02-11