Keithley Instruments Acquired by Danaher Corporation for $21.60 per Share

Keithley Instruments, Inc. KEI today announced completion of the merger of Aegean Acquisition Corporation, an indirect wholly owned subsidiary of Danaher Corporation DHR, into Keithley pursuant to the previously announced Merger Agreement dated September 29, 2010 among Danaher Corporation, Aegean Acquisition Corporation and Keithley. Under the terms of the merger agreement, each outstanding common share and class B common share of Keithley has been converted into the right to receive $21.60 per share, in cash, without interest. Keithley is now an indirect wholly owned subsidiary of Danaher Corporation and, as a result of the completion of the merger, Keithley shares will cease to trade on the New York Stock Exchange at the close of the market today.