X0306 4 2020-02-19 0 0000935494 NATIONAL INSTRUMENTS CORP NATI 0001801730 Green Jason Elliot C/O NATIONAL INSTRUMENTS CORPORATION 11500 NORTH MOPAC AUSTIN TX 78759 0 1 0 0 Senior Vice President Common Stock 2020-02-19 4 A 0 11184 0 A 72018 D Performance-Based Restricted Stock Units 2020-02-19 4 A 0 11184 0 A 2035-05-01 Common Stock 11184 11184 D The number of performance-based restricted stock units ("PRSUs") reported in Table II represents the target number of PRSUs that were granted to the reporting person pursuant to the Issuer's 2015 Equity Incentive Plan. Per the terms of the award agreement governing the PRSUs, the number of underlying shares of the Issuer's common stock that the reporting person is ultimately entitled to receive at the time of vesting ranges from 0% to 200% of the target number of PRSUs granted, subject to how the Issuer's total shareholder return ranks in comparison to companies that comprise the Russell 2000 Index over a performance period consisting of the three years ended December 31, 2022. Deborah Donahue as attorney in fact for Jason Elliot Green 2020-02-20