| SC 13G/A | 2012-01-19 | ROYCE & ASSOCIATES LLC | NATIONAL INSTRUMENTS CORP /DE/ | 6,099,951 | 5.1% | EDGAR |
| SC 13G | 2011-10-07 | BROWN ADVISORY HOLDINGS INC | NATIONAL INSTRUMENTS CORP /DE/ | 6,356,078 | 5.3% | EDGAR |
| SC 13G/A | 2011-02-14 | Neuberger Berman Group LLC | NATIONAL INSTRUMENTS CORP /DE/ | 4,021,263 | 5.1% | EDGAR |
| SC 13G | 2011-02-14 | Capital World Investors | NATIONAL INSTRUMENTS CORP /DE/ | 4,960,993 | 6.3% | EDGAR |
| SC 13G/A | 2011-02-10 | PRICE T ROWE ASSOCIATES INC /MD/ | NATIONAL INSTRUMENTS CORP /DE/ | 1,234,840 | 1.5% | EDGAR |
| SC 13G/A | 2011-02-10 | TRUCHARD JAMES J | NATIONAL INSTRUMENTS CORP /DE/ | 16,143,299 | 20.5% | EDGAR |
| SC 13G/A | 2011-01-18 | ROYCE & ASSOCIATES LLC | NATIONAL INSTRUMENTS CORP /DE/ | 4,050,901 | 5.2% | EDGAR |
| SC 13G/A | 2010-02-17 | Neuberger Berman Group LLC | NATIONAL INSTRUMENTS CORP /DE/ | 5,179,641 | 6.7% | EDGAR |
| SC 13G/A | 2010-02-16 | TRUCHARD JAMES J | NATIONAL INSTRUMENTS CORP /DE/ | 16,910,175 | 21.7% | EDGAR |
| SC 13G/A | 2010-02-12 | Invesco Ltd. | NATIONAL INSTRUMENTS CORP /DE/ | 836,346 | 1.1% | EDGAR |
| SC 13G | 2010-02-11 | PRICE T ROWE ASSOCIATES INC /MD/ | NATIONAL INSTRUMENTS CORP /DE/ | 4,044,000 | 5.2% | EDGAR |
| SC 13G/A | 2010-01-26 | ROYCE & ASSOCIATES LLC | NATIONAL INSTRUMENTS CORP /DE/ | 4,028,724 | 5.2% | EDGAR |
| SC 13D | 2009-11-19 | NATIONAL INSTRUMENTS CORP /DE/ | GigOptix, Inc. | 1,066,265 | 12.0% | EDGAR |
| SC 13G | 2009-06-11 | Neuberger Berman Group LLC | NATIONAL INSTRUMENTS CORP /DE/ | 5,889,137 | 7.6% | EDGAR |
| SC 13G/A | 2009-02-20 | TRUCHARD JAMES J | NATIONAL INSTRUMENTS CORP /DE/ | 16,910,175 | 21.9% | EDGAR |
| SC 13G | 2009-02-17 | Invesco Ltd. | NATIONAL INSTRUMENTS CORP /DE/ | 4,258,307 | 5.4% | EDGAR |
| SC 13G/A | 2009-02-13 | Invesco Ltd. | NATIONAL INSTRUMENTS CORP /DE/ | 4,258,307 | 5.4% | EDGAR |
| SC 13G/A | 2009-02-11 | NEUBERGER BERMAN INC | NATIONAL INSTRUMENTS CORP /DE/ | 5,693,568 | 7.2% | EDGAR |
| SC 13G | 2009-01-27 | ROYCE & ASSOCIATES LLC | NATIONAL INSTRUMENTS CORP /DE/ | 4,134,656 | 5.2% | EDGAR |
| SC 13G/A | 2008-02-14 | TRUCHARD JAMES J | NATIONAL INSTRUMENTS CORP /DE/ | 17,292,360 | 21.7% | EDGAR |