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EX-31.2 - EXHIBIT 31.2 - NATIONAL INSTRUMENTS CORPnati-20180930xex31_2.htm
EX-31.1 - EXHIBIT 31.1 - NATIONAL INSTRUMENTS CORPnati-20180930xex31_1.htm
EX-10.30 - EXHIBIT 10.30 - NATIONAL INSTRUMENTS CORPnati20180930xex1030.htm
10-Q - 10-Q - NATIONAL INSTRUMENTS CORPnati09302018_10-q.htm
EXHIBIT 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Alex M. Davern, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of National Instruments Corporation on Form 10-Q for the fiscal quarter ended September 30, 2018 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Form 10-Q fairly presents in all material respects the financial condition and results of operations of National Instruments Corporation.

By: /s/ Alex M. Davern
Alex M. Davern
Chief Executive Officer
Date: October 31, 2018

I, Karen Rapp, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of National Instruments Corporation on Form 10-Q for the fiscal quarter ended September 30, 2018 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Form 10-Q fairly presents in all material respects the financial condition and results of operations of National Instruments Corporation.

By: /s/ Karen Rapp
Karen Rapp
Chief Financial Officer
Date: October 31, 2018