X0202 4 2006-02-15 0 0001003113 MOLECULAR DEVICES CORP MDCC 0001260556 KEEGAN JOSEPH D C/O MOLECULAR DEVICES CORPORATION 1311 ORLEANS DRIVE SUNNYVALE CA 94089 1 1 0 0 CEO/President Common Stock 2006-02-15 4 S 0 182 30.9700 D 0.00 D Common Stock 2006-02-15 4 S 0 15 30.9700 D 5751.00 I By Keegan Trust UAD 4/27/90 Common Stock 2006-02-15 4 S 0 1100 30.9500 D 4651.00 I By Keegan Trust UAD 4/27/90 Common Stock 2006-02-15 4 S 0 615 30.9400 D 4036.00 I By Keegan Trust UAD 4/27/90 Common Stock 2006-02-15 4 S 0 1800 30.9300 D 2236.00 I By Keegan Trust UAD 4/27/90 Common Stock 2006-02-15 4 S 0 500 30.9200 D 1736.00 I By Keegan Trust UAD 4/27/90 Common Stock 2006-02-15 4 S 0 300 30.9100 D 1436.00 I By Keegan Trust UAD 4/27/90 Common Stock 2006-02-15 4 S 0 587 30.8100 D 849.00 I By Keegan Trust UAD 4/27/90 /s/ Keegan, Joseph D. 2006-02-17