| SC 13G | 2023-02-14 | T. Rowe Price Investment Management, Inc. | NATIONAL INSTRUMENTS CORP | 8,097,540 | 6.2% | EDGAR |
| SC 13G/A | 2023-02-10 | JANUS HENDERSON GROUP PLC | NATIONAL INSTRUMENTS CORP | 8,885,010 | 6.8% | EDGAR |
| SC 13G/A | 2023-02-09 | VANGUARD GROUP INC | NATIONAL INSTRUMENTS CORP | 13,210,667 | 10.1% | EDGAR |
| SC 13G/A | 2023-01-24 | BlackRock Inc. | NATIONAL INSTRUMENTS CORP | 12,045,874 | 9.2% | EDGAR |
| SC 13G/A | 2022-11-10 | VANGUARD GROUP INC | NATIONAL INSTRUMENTS CORP | 13,314,044 | 10.2% | EDGAR |
| SC 13G/A | 2022-08-10 | PRICE T ROWE ASSOCIATES INC /MD/ | NATIONAL INSTRUMENTS CORP | 6,447,173 | 4.8% | EDGAR |
| SC 13G/A | 2022-02-14 | PRICE T ROWE ASSOCIATES INC /MD/ | NATIONAL INSTRUMENTS CORP | 18,978,320 | 14.3% | EDGAR |
| SC 13G/A | 2022-02-10 | VANGUARD GROUP INC | NATIONAL INSTRUMENTS CORP | 11,918,198 | 9.0% | EDGAR |
| SC 13G/A | 2022-02-10 | JANUS HENDERSON GROUP PLC | NATIONAL INSTRUMENTS CORP | 9,871,803 | 7.5% | EDGAR |
| SC 13G/A | 2022-02-01 | BlackRock Inc. | NATIONAL INSTRUMENTS CORP | 11,218,802 | 8.5% | EDGAR |
| SC 13G/A | 2021-02-16 | PRICE T ROWE ASSOCIATES INC /MD/ | NATIONAL INSTRUMENTS CORP | 20,869,442 | 15.9% | EDGAR |
| SC 13G/A | 2021-02-11 | JANUS HENDERSON GROUP PLC | NATIONAL INSTRUMENTS CORP | 9,409,156 | 7.2% | EDGAR |
| SC 13G/A | 2021-02-10 | VANGUARD GROUP INC | NATIONAL INSTRUMENTS CORP | 11,586,378 | 8.8% | EDGAR |
| SC 13G/A | 2021-01-29 | BlackRock Inc. | NATIONAL INSTRUMENTS CORP | 12,661,502 | 9.6% | EDGAR |
| SC 13G/A | 2020-02-14 | PRICE T ROWE ASSOCIATES INC /MD/ | NATIONAL INSTRUMENTS CORP | 17,704,097 | 13.5% | EDGAR |
| SC 13G/A | 2020-02-14 | James J. Truchard Marital Trust | NATIONAL INSTRUMENTS CORP | 7,770,347 | 6.0% | EDGAR |
| SC 13G/A | 2020-02-13 | JANUS HENDERSON GROUP PLC | NATIONAL INSTRUMENTS CORP | 9,711,469 | 7.4% | EDGAR |
| SC 13G/A | 2020-02-12 | VANGUARD GROUP INC | NATIONAL INSTRUMENTS CORP | 11,970,552 | 9.1% | EDGAR |
| SC 13G/A | 2020-02-04 | BlackRock Inc. | NATIONAL INSTRUMENTS CORP | 13,786,517 | 10.5% | EDGAR |
| SC 13G/A | 2019-09-10 | PRICE T ROWE ASSOCIATES INC /MD/ | NATIONAL INSTRUMENTS CORP | 14,495,631 | 10.9% | EDGAR |