0001140361-11-024794.txt : 20110504 0001140361-11-024794.hdr.sgml : 20110504 20110504124804 ACCESSION NUMBER: 0001140361-11-024794 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20110501 FILED AS OF DATE: 20110504 DATE AS OF CHANGE: 20110504 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Porterfield Robert CENTRAL INDEX KEY: 0001307795 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 000-25426 FILM NUMBER: 11809206 MAIL ADDRESS: STREET 1: 11500 N. MOPAC EXPWY CITY: AUSTIN STATE: TX ZIP: 78759 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: NATIONAL INSTRUMENTS CORP /DE/ CENTRAL INDEX KEY: 0000935494 STANDARD INDUSTRIAL CLASSIFICATION: SERVICES-PREPACKAGED SOFTWARE [7372] IRS NUMBER: 741871327 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 11500 NORTH MOPAC EXPRESSWAY CITY: AUSTIN STATE: TX ZIP: 78759 BUSINESS PHONE: 5123389119 MAIL ADDRESS: STREET 1: 11500 NORTH MOPAC EXPRESSWAY CITY: AUSTIN STATE: TX ZIP: 78759 4 1 doc1.xml FORM 4 X0303 4 2011-05-01 0 0000935494 NATIONAL INSTRUMENTS CORP /DE/ NATI 0001307795 Porterfield Robert C/O NATIONAL INSTRUMENTS CORP 11500 N. MOPAC EXPWY AUSTIN TX 78759 0 1 0 0 Vice President Common Stock 2011-05-01 4 M 0 7261 A 70874 D Common Stock 2011-05-01 4 M 0 5257 A 76131 I by Spouse Common Stock 2011-05-02 5 M 0 297 23.9757 A 76428 I by Spouse Restricted Stock Units 2011-05-01 4 M 0 1001 0 D 2020-05-01 Common Stock 2435 1434 I Spouse Restricted Stock Units 2011-05-01 4 M 0 751 0 D 2021-05-01 Common Stock 2352 1601 I Spouse Restricted Stock Units 2011-05-01 4 M 0 1252 0 D 2022-05-01 Common Stock 4884 3632 I Spouse Restricted Stock Units 2011-05-01 4 M 0 1252 0 D 2023-05-01 Common Stock 5844 4592 I Spouse Restricted Stock Units 2011-05-01 4 M 0 1001 0 D 2024-05-01 Common Stock 5400 4399 I Spouse Restricted Stock Units 2011-05-01 4 M 0 2504 0 D 2020-05-01 Common Stock 6087 3583 D Restricted Stock Units 2011-05-01 4 M 0 1252 0 D 2021-05-01 Common Stock 3921 2669 D Restricted Stock Units 2011-05-01 4 M 0 1252 0 D 2022-05-01 Common Stock 4884 3632 D Restricted Stock Units 2011-05-01 4 M 0 1252 0 D 2023-05-01 Common Stock 5844 4592 D Restricted Stock Units 2011-05-01 4 M 0 1001 0 D 2024-05-01 Common Stock 5400 4399 D Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. The restricted stock units vest and become exercisable based on time and performance milestones set by the Issuer. On February 22, 2011, the common stock of National Instruments Corporation split 3-for-2, resulting in the reporting person's ownership of additional shares of common stock. David G. Hugley as attorney-in-fact for Robert R. Porterfield 2011-05-04