X0202 4 2007-03-26 1 0001003113 MOLECULAR DEVICES CORP MDCC 0001231183 HARKNESS TIMOTHY 1311 ORLEANS DRIVE SUNNYVALE CA 94089 0 1 0 0 CFO/VP Finance Common Stock 2007-03-26 4 M 0 12500 15.8500 A 12500.0000 D Common Stock 2007-03-26 4 D 0 12500 35.5000 D 0.0000 D Common Stock 2007-03-26 4 M 0 35000 19.6600 A 35000.0000 D Common Stock 2007-03-26 4 D 0 35000 35.5000 D 0.0000 D Common Stock 2007-03-26 4 M 0 32500 21.3200 A 32500.0000 D Common Stock 2007-03-26 4 D 0 32500 35.5000 D 0.0000 D Common Stock 2007-03-26 4 M 0 35000 29.4500 A 35000.0000 D Common Stock 2007-03-26 4 D 0 35000 35.5000 D 0.0000 D Employee Stock Option (Right to Buy) 15.8500 2007-03-26 4 M 0 12500 0 D 2004-02-10 2013-02-10 Common Stock 12500.00 0.00 D Employee Stock Option (Right to Buy) 19.6600 2007-03-26 4 M 0 35000 0 D 2005-02-11 2014-02-11 Common Stock 35000.00 0.00 D Employee Stock Option (Right to Buy) 21.3200 2007-03-26 4 M 0 32500 0 D 2006-02-16 2015-02-16 Common Stock 32500.00 0.00 D Employee Stock Option (Right to Buy) 29.4500 2007-03-26 4 M 0 35000 0 D 2007-02-10 2016-02-09 Common Stock 35000.00 0.00 D Pursuant to the terms of the Agreement and Plan of Merger, dated January 28, 2007, among MDS Inc., Molecular Devices Corporation ("MDC") and Monument Acquisition Corp., each option outstanding immediately prior to 4:01 p.m. EDT on March 26, 2007 (the "Effective Time") was accelerated in full and was canceled as of the Effective Time and thereafter represents the right to receive an amount in cash equal to the product of the number of shares of common stock of MDC subject to such option multiplied by the amount by which $35.50 exceeds the exercise price per share subject to such option. /s/ Harkness, Timothy 2007-03-28