| Date | Time | Source | Headline | Symbol | Company |
| 10/03/2011 | 21:30 | Marketwired | Keithley Publishes Online Tutorial Seminars on CD | NYSE:KEI | Keithley Instruments, Inc. |
| 09/12/2010 | 20:09 | Edgar (US Regulatory) | (25-NSE) | NYSE:KEI | Keithley Instruments, Inc. |
| 09/12/2010 | 18:33 | Edgar (US Regulatory) | Amended Statement of Beneficial Ownership (SC 13D/A) | NYSE:KEI | Keithley Instruments, Inc. |
| 09/12/2010 | 17:03 | Edgar (US Regulatory) | Amended Statement of Beneficial Ownership (SC 13D/A) | NYSE:KEI | Keithley Instruments, Inc. |
| 08/12/2010 | 21:56 | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 08/12/2010 | 21:55 | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 08/12/2010 | 21:55 | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 08/12/2010 | 21:53 | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 08/12/2010 | 21:52 | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 08/12/2010 | 21:52 | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 08/12/2010 | 21:51 | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 08/12/2010 | 21:48 | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 08/12/2010 | 21:46 | Edgar (US Regulatory) | Post-Effective Amendment to an S-8 filing (S-8 POS) | NYSE:KEI | Keithley Instruments, Inc. |
| 08/12/2010 | 21:44 | Edgar (US Regulatory) | Current report filing (8-K) | NYSE:KEI | Keithley Instruments, Inc. |
| 08/12/2010 | 21:05 | PR Newswire (US) | Keithley Instruments Acquired by Danaher Corporation | NYSE:KEI | Keithley Instruments, Inc. |
| 07/12/2010 | 14:00 | PR Newswire (US) | Keithley Instruments Releases 11 New 'How-To' Videos on Configuring and Operating Source-Measure Units | NYSE:KEI | Keithley Instruments, Inc. |
| 02/12/2010 | 14:00 | PR Newswire (US) | Free Keithley Webinar Teaches Fundamentals of Bias Temperature Instability Measurement Methods | NYSE:KEI | Keithley Instruments, Inc. |
| 30/11/2010 | 14:00 | PR Newswire (US) | Keithley Instruments Honored for International Entrepreneurship | NYSE:KEI | Keithley Instruments, Inc. |
| 19/11/2010 | 18:28 | Edgar (US Regulatory) | Current report filing (8-K) | NYSE:KEI | Keithley Instruments, Inc. |
| 19/11/2010 | 14:09 | PR Newswire (US) | Keithley Instruments' Shareholders Approve Merger Agreement | NYSE:KEI | Keithley Instruments, Inc. |
| 16/11/2010 | 15:38 | Edgar (US Regulatory) | Amended Statement of Beneficial Ownership (SC 13D/A) | NYSE:KEI | Keithley Instruments, Inc. |
| 16/11/2010 | 11:02 | Edgar (US Regulatory) | Additional Proxy Soliciting Materials (definitive) (DEFA14A) | NYSE:KEI | Keithley Instruments, Inc. |
| 16/11/2010 | 11:02 | Edgar (US Regulatory) | Current report filing (8-K) | NYSE:KEI | Keithley Instruments, Inc. |
| 15/11/2010 | 23:03 | PR Newswire (US) | Standard & Poor's Announces Changes to U.S. Index | NYSE:KEI | Keithley Instruments, Inc. |
| 15/11/2010 | 14:00 | 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 | 14:00 | PR Newswire (US) | Keithley Instruments Hosts Applications Forum to Encourage Idea Exchange, Discussions Among Users | NYSE:KEI | Keithley Instruments, Inc. |
| 04/11/2010 | 15:04 | Edgar (US Regulatory) | Additional Proxy Soliciting Materials (definitive) (DEFA14A) | NYSE:KEI | Keithley Instruments, Inc. |
| 04/11/2010 | 15:01 | Edgar (US Regulatory) | Current report filing (8-K) | NYSE:KEI | Keithley Instruments, Inc. |
| 04/11/2010 | 12:12 | 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. |
| 02/11/2010 | 13:00 | 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. |