Acquisition completed!

Keithley Instruments has announced completion of the merger of Aegean Acquisition Corporation, an indirect wholly owned subsidiary of Danaher Corporation, 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.

Joseph P. Keithley, the Company's Chairman, President and Chief Executive Officer, said, "We are pleased to have completed this transaction with Danaher, which we believe represents the best possible way to deliver maximum value to our shareholders.  Keithley has a bright future under the ownership of Danaher and, I would like to thank every employee for their hard work and dedication that have brought us to this day."