Website: N/A
Stock Symbol: NYSE: KEI
Market Value: N/A (in millions)

Keithley Instruments, Inc. was founded in 1946 and organized as an Ohio corporation in 1955. Its principal executive offices are located at 28775 Aurora Road, Solon, Ohio 44139; telephone (440) 248-0400. References herein to the “Company,” “Keithley,” “we” or “our” are to Keithley Instruments, Inc. and its subsidiaries unless the context indicates otherwise. Our website is www.keithley.com. We make our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those reports filed with or furnished to the U.S. Securities and Exchange Commission (the “SEC”) available to the public free of charge through our website as soon as reasonably practicable after making such filings. The public may read and copy any materials we file with the SEC at the SEC’s Public Reference Room at 100 F Street, NE, Washington, DC 20549.