X0306 4 2012-07-02 0 0000935494 NATIONAL INSTRUMENTS CORP /DE/ NATI 0001008357 KODOSKY JEFFREY L C/O NATIONAL INSTRUMENTS CORP 11500 N. MOPAC EXPRESSWAY AUSTIN TX 78759 1 0 0 0 Common Stock 2012-07-02 4 S 0 4000 26.6228 D 727826 D Common Stock 2012-07-02 4 S 0 4000 26.6228 D 727827 I by Spouse Shares were sold under Reporting Person's 10(b)5-1 Plan. David G. Hugley as attorney-in-fact for Jeffrey L. Kodosky 2012-07-02