Porterfield Robert

Related Filers (1)

Ownership (37)

4
Wednesday, 11/9/2011
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Wednesday, 5/4/2011
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Friday, 4/22/2011
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Wednesday, 3/2/2011
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Thursday, 11/4/2010
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Monday, 5/3/2010
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Tuesday, 3/23/2010
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Monday, 12/7/2009
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Tuesday, 5/5/2009
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Tuesday, 12/23/2008
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Tuesday, 8/12/2008
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Monday, 5/5/2008
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Monday, 5/5/2008
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Friday, 2/15/2008
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Friday, 12/28/2007
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Thursday, 11/29/2007
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Friday, 8/31/2007
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Thursday, 5/3/2007
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Friday, 4/27/2007
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Monday, 2/12/2007
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Tuesday, 2/6/2007
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Thursday, 12/14/2006
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Friday, 9/8/2006
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Wednesday, 5/3/2006
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Monday, 5/1/2006
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Wednesday, 4/5/2006
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Wednesday, 2/1/2006
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Thursday, 10/20/2005
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Thursday, 8/4/2005
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Monday, 5/23/2005
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Wednesday, 5/11/2005
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Friday, 4/8/2005
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Friday, 2/18/2005
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4/A
Friday, 2/18/2005
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Tuesday, 1/4/2005
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
4
Friday, 11/12/2004
NATIONAL INSTRUMENTS CORP /DE/: Statement of changes in beneficial ownership of securities
3
Thursday, 11/4/2004
NATIONAL INSTRUMENTS CORP /DE/: Initial statement of beneficial ownership of securities
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