| Date | Time | Source | Headline | Symbol | Company |
| 11/03/2011 | 08:30 | Marketwired | Keithley Publishes Online Tutorial Seminars on CD | NYSE:KEI | Keithley Instruments, Inc. |
| 10/12/2010 | 07:09 | Edgar (US Regulatory) | (25-NSE) | NYSE:KEI | Keithley Instruments, Inc. |
| 10/12/2010 | 05:33 | Edgar (US Regulatory) | Amended Statement of Beneficial Ownership (SC 13D/A) | NYSE:KEI | Keithley Instruments, Inc. |
| 10/12/2010 | 04:03 | Edgar (US Regulatory) | Amended Statement of Beneficial Ownership (SC 13D/A) | NYSE:KEI | Keithley Instruments, Inc. |
| 09/12/2010 | 08:56 | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 09/12/2010 | 08:55 | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 09/12/2010 | 08:55 | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 09/12/2010 | 08:53 | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 09/12/2010 | 08:52 | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 09/12/2010 | 08:52 | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 09/12/2010 | 08:51 | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 09/12/2010 | 08:48 | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 09/12/2010 | 08:46 | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 09/12/2010 | 08:44 | Edgar (US Regulatory) | Current report filing (8-K) | NYSE:KEI | Keithley Instruments, Inc. |
| 09/12/2010 | 08:05 | PR Newswire (US) | Keithley Instruments Acquired by Danaher Corporation | NYSE:KEI | Keithley Instruments, Inc. |
| 08/12/2010 | 01:00 | PR Newswire (US) | Keithley Instruments Releases 11 New 'How-To' Videos on Configuring and Operating Source-Measure Units | NYSE:KEI | Keithley Instruments, Inc. |
| 03/12/2010 | 01:00 | PR Newswire (US) | Free Keithley Webinar Teaches Fundamentals of Bias Temperature Instability Measurement Methods | NYSE:KEI | Keithley Instruments, Inc. |
| 01/12/2010 | 01:00 | PR Newswire (US) | Keithley Instruments Honored for International Entrepreneurship | NYSE:KEI | Keithley Instruments, Inc. |
| 20/11/2010 | 05:28 | Edgar (US Regulatory) | Current report filing (8-K) | NYSE:KEI | Keithley Instruments, Inc. |
| 20/11/2010 | 01:09 | PR Newswire (US) | Keithley Instruments' Shareholders Approve Merger Agreement | NYSE:KEI | Keithley Instruments, Inc. |
| 17/11/2010 | 02:38 | Edgar (US Regulatory) | Amended Statement of Beneficial Ownership (SC 13D/A) | NYSE:KEI | Keithley Instruments, Inc. |
| 16/11/2010 | 22:02 | Edgar (US Regulatory) | Additional Proxy Soliciting Materials (definitive) (DEFA14A) | NYSE:KEI | Keithley Instruments, Inc. |
| 16/11/2010 | 22:02 | Edgar (US Regulatory) | Current report filing (8-K) | NYSE:KEI | Keithley Instruments, Inc. |
| 16/11/2010 | 10:03 | PR Newswire (US) | Standard & Poor's Announces Changes to U.S. Index | NYSE:KEI | Keithley Instruments, Inc. |
| 16/11/2010 | 01:00 | PR Newswire (US) | Free Keithley Web-Based Seminar Teaches Optimum Methods and Techniques for Making Electrical Resistivity Measurements | NYSE:KEI | Keithley Instruments, Inc. |
| 12/11/2010 | 01:00 | PR Newswire (US) | Keithley Instruments Hosts Applications Forum to Encourage Idea Exchange, Discussions Among Users | NYSE:KEI | Keithley Instruments, Inc. |
| 05/11/2010 | 02:04 | Edgar (US Regulatory) | Additional Proxy Soliciting Materials (definitive) (DEFA14A) | NYSE:KEI | Keithley Instruments, Inc. |
| 05/11/2010 | 02:01 | Edgar (US Regulatory) | Current report filing (8-K) | NYSE:KEI | Keithley Instruments, Inc. |
| 04/11/2010 | 23:12 | 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. |
| 03/11/2010 | 00:00 | 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. |