Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

         Date of Report (Date of earliest event reported): July 23, 2003

                        National Instruments Corporation
             (Exact name of registrant as specified in its charter)

    Delaware                        0-25426                   74-1871327
(State or other             (Commission File Number)        (IRS Employer
jurisdiction of                                           Identification No.)

      11500 North MoPac Expressway, Austin, Texas                  78759
       (Address of principal executive offices)                 (Zip Code)

       Registrant's telephone number, including area code: (512) 338-9119

          (Former name or former address, if changed since last report)

Item 7.  Financial Statements and Exhibits.

     (c)  Exhibits.

     99.1 Press Release dated July 23, 2003.

Item 9.  Regulation FD Disclosure.

     The press  release  filed as an exhibit to this  report is being  furnished
under Item 12 (Furnishing of Earnings  Releases) as  contemplated by SEC Release
Nos. 33-8176 and 33-8216.


     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

Dated:      July 23, 2003                       NATIONAL INSTRUMENTS CORPORATION

                                    /s/ DAVID G. HUGLEY
                                    David G. Hugley
                                    Vice President & General Counsel

                                INDEX TO EXHIBITS

Exhibit Number    Description of Document

    99.1          Press Release dated July 23, 2003.