United States securities and exchange commission logo September 2, 2020 Karen Rapp Chief Financial Officer National Instruments Corporation 11500 North MoPac Expressway Austin, TX 78759 Re: National Instruments Corporation Form 10-K for the Year Ended December 31, 2019 Filed February 20, 2020 File No. 000-25426 Dear Ms. Rapp: We have completed our review of your filing. We remind you that the company and its management are responsible for the accuracy and adequacy of their disclosures, notwithstanding any review, comments, action or absence of action by the staff. Sincerely, Division of Corporation Finance Office of Technology