NATIONAL INSTRS CORP

CUSIP: 636518102 Class: Common Stock

DEARBORN PARTNERS LLC's Holding History (CIK: 0001206792)

Note: Option positions (PUT/CALL) are excluded.

Q4 2018
Shares 4,850 Value ($000) $220 Avg Close Range
Q3 2018
Shares 6,800 Value ($000) $329 Avg Close Range
Q2 2018
Shares 6,800 Value ($000) $285 Avg Close Range
Q1 2018
Shares 7,600 Value ($000) $384 Avg Close Range
Q4 2017
Shares 8,300 Value ($000) $346 Avg Close Range
Q3 2017
Shares 8,700 Value ($000) $367 Avg Close Range
Q2 2017
Shares 8,700 Value ($000) $350 Avg Close Range
Q1 2017
Shares 9,000 Value ($000) $293 Avg Close Range
Q4 2016
Shares 9,000 Value ($000) $277 Avg Close Range
Q3 2016
Shares 9,000 Value ($000) $256 Avg Close Range
Q2 2016
Shares 8,700 Value ($000) $238 Avg Close Range
Q1 2016
Shares 7,200 Value ($000) $217 Avg Close Range
Q4 2015
Shares 7,200 Value ($000) $207 Avg Close Range
Q3 2015
Shares 7,200 Value ($000) $200 Avg Close Range
Q2 2015
Shares 7,200 Value ($000) $212 Avg Close Range
Q1 2015
Shares 8,400 Value ($000) $269 Avg Close Range
Q4 2014
Shares 9,200 Value ($000) $286 Avg Close Range
Q3 2014
Shares 9,200 Value ($000) $285 Avg Close Range
Q2 2014
Shares 9,600 Value ($000) $311 Avg Close Range
Q1 2014
Shares 9,600 Value ($000) $275 Avg Close Range
Q4 2013
Shares 9,600 Value ($000) $307 Avg Close Range
Q3 2013
Shares 9,600 Value ($000) $297 Avg Close Range
Q2 2013
Shares 10,050 Value ($000) $281 Avg Close Range