| Date | Time | Source | Headline | Symbol | Company |
| 03/10/2011 | 3:30PM | Marketwired | Keithley Publishes Online Tutorial Seminars on CD | NYSE:KEI | Keithley Instruments, Inc. |
| 12/09/2010 | 2:09PM | Edgar (US Regulatory) | (25-NSE) | NYSE:KEI | Keithley Instruments, Inc. |
| 12/09/2010 | 12:33PM | Edgar (US Regulatory) | Amended Statement of Beneficial Ownership (SC 13D/A) | NYSE:KEI | Keithley Instruments, Inc. |
| 12/09/2010 | 11:03AM | Edgar (US Regulatory) | Amended Statement of Beneficial Ownership (SC 13D/A) | NYSE:KEI | Keithley Instruments, Inc. |
| 12/08/2010 | 3:56PM | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 12/08/2010 | 3:55PM | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 12/08/2010 | 3:55PM | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 12/08/2010 | 3:53PM | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 12/08/2010 | 3:52PM | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 12/08/2010 | 3:52PM | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 12/08/2010 | 3:51PM | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 12/08/2010 | 3:48PM | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 12/08/2010 | 3:46PM | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 12/08/2010 | 3:44PM | Edgar (US Regulatory) | Current report filing (8-K) | NYSE:KEI | Keithley Instruments, Inc. |
| 12/08/2010 | 3:05PM | PR Newswire (US) | Keithley Instruments Acquired by Danaher Corporation | NYSE:KEI | Keithley Instruments, Inc. |
| 12/07/2010 | 8:00AM | PR Newswire (US) | Keithley Instruments Releases 11 New 'How-To' Videos on Configuring and Operating Source-Measure Units | NYSE:KEI | Keithley Instruments, Inc. |
| 12/02/2010 | 8:00AM | PR Newswire (US) | Free Keithley Webinar Teaches Fundamentals of Bias Temperature Instability Measurement Methods | NYSE:KEI | Keithley Instruments, Inc. |
| 11/30/2010 | 8:00AM | PR Newswire (US) | Keithley Instruments Honored for International Entrepreneurship | NYSE:KEI | Keithley Instruments, Inc. |
| 11/19/2010 | 12:28PM | Edgar (US Regulatory) | Current report filing (8-K) | NYSE:KEI | Keithley Instruments, Inc. |
| 11/19/2010 | 8:09AM | PR Newswire (US) | Keithley Instruments' Shareholders Approve Merger Agreement | NYSE:KEI | Keithley Instruments, Inc. |
| 11/16/2010 | 9:38AM | Edgar (US Regulatory) | Amended Statement of Beneficial Ownership (SC 13D/A) | NYSE:KEI | Keithley Instruments, Inc. |
| 11/16/2010 | 5:02AM | Edgar (US Regulatory) | Additional Proxy Soliciting Materials (definitive) (DEFA14A) | NYSE:KEI | Keithley Instruments, Inc. |
| 11/16/2010 | 5:02AM | Edgar (US Regulatory) | Current report filing (8-K) | NYSE:KEI | Keithley Instruments, Inc. |
| 11/15/2010 | 5:03PM | PR Newswire (US) | Standard & Poor's Announces Changes to U.S. Index | NYSE:KEI | Keithley Instruments, Inc. |
| 11/15/2010 | 8:00AM | PR Newswire (US) | Free Keithley Web-Based Seminar Teaches Optimum Methods and Techniques for Making Electrical Resistivity Measurements | NYSE:KEI | Keithley Instruments, Inc. |
| 11/11/2010 | 8:00AM | PR Newswire (US) | Keithley Instruments Hosts Applications Forum to Encourage Idea Exchange, Discussions Among Users | NYSE:KEI | Keithley Instruments, Inc. |
| 11/04/2010 | 10:04AM | Edgar (US Regulatory) | Additional Proxy Soliciting Materials (definitive) (DEFA14A) | NYSE:KEI | Keithley Instruments, Inc. |
| 11/04/2010 | 10:01AM | Edgar (US Regulatory) | Current report filing (8-K) | NYSE:KEI | Keithley Instruments, Inc. |
| 11/04/2010 | 7:12AM | PR Newswire (US) | Keithley Instruments Reports Fourth Quarter Fiscal 2010 Sales Growth of 58 Percent and Net Income of $9.1 Million | NYSE:KEI | Keithley Instruments, Inc. |
| 11/02/2010 | 8:00AM | Business Wire | Zoughi to Receive 2011 IEEE Joseph F. Keithley Award for Contributions to Microwave and Millimeter Wave Measurement Techniques | NYSE:KEI | Keithley Instruments, Inc. |