| Filed On | Filing |
|---|---|
| 27 Feb 2017 | SC 13D |
| 21 Feb 2017 | SC 13D |
| 01 May 2012 | SCHEDULE 13D |
| 03 Jan 2012 | SCHEDULE 13D |
| 19 Aug 2011 | SCHEDULE 13D |
| 19 Nov 2009 | NATIONAL INSTRUMENTS CORP SC 13D 11-9-2009 |
| 19 Nov 2009 | SC 13D |
| 23 Dec 2008 | SC 13D |
| 19 Dec 2008 | SCHEDULE 13D |
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