CUSIP No. 636518 10 2 Page 1 of _5_ Pages -------------------------------------- OMB APPROVAL OMB Number: 3235-0145 Expires: December 31, 1997 Estimated average burden hours per response.............14.90 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. ONE )* NATIONAL INSTRUMENTS CORPORATION - - -------------------------------------------------------------------------------- (Name of Issuer) COMMON STOCK - - -------------------------------------------------------------------------------- (Title of Class of Securities) 636518 10 2 - - -------------------------------------------------------------------------------- (CUSIP Number) *The remainder of this cover page shall be filled out for a reporting person's initial filing of this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). SEC 1745 (2-95) Page 1 of _5_ Pages 0280544.01CUSIP No. 636518 10 2 Page 2 of _5_ Pages -------------------------------------- CUSIP No. 636518 10 2 13G Page 2 of _5_ Pages 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON JAMES J. TRUCHARD 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| 3 SEC USE ONLY 4 CITIZENSHIP OR PLACE OF ORGANIZATION USA 5 SOLE VOTING POWER NUMBER OF 6,050,716 SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 6 SHARED VOTING POWER -0- 7 SOLE DISPOSITIVE POWER 6,050,716 8 SHARED DISPOSITIVE POWER -0- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 6,050,716 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 28.0% 12 TYPE OF REPORTING PERSON* IN *SEE INSTRUCTION BEFORE FILLING OUT 0280544.01 CUSIP No. 636518 10 2 Page 3 of _5_ Pages -------------------------------------- Item 1. (a) Name of Issuer NATIONAL INSTRUMENTS CORPORATION (b) Address of Issuer's Principal Executive Offices 6504 Bridge Point Parkway, Austin, TX 78730-5039 Item 2. (a) Name of Person Filing JAMES J. TRUCHARD (b) Address of Principal Business Office or, if none, Residence 6504 Bridge Point Parkway, Austin, TX 78730-5039 (c) Citizenship USA (d) Title of Class of Securities COMMON STOCK (e) CUSIP Number 636518 10 2 Item 3. If this statement is filed pursuant to Rule 13d-1(b), or 13d-2(b), check whether the person is a: (a) |_| Broker or Dealer registered under Section 15 of the Ac (b) |_| Bank as defined in section 3(a)(6) of the Act (c) |_| Insurance Company as defined in section 3(a)(19) of the Act (d) |_| Investment Company registered under section 8 of the Investment Company Act (e) |_| Investment Adviser registered under section 203 of the Investment Advisers Act of 1940 (f) |_| Employee Benefit Plan, Pension Fund which is subject to the provisions of the Employee Retirement Income Security Act of 1974 or Endowment Fund, see ss.240.13d-1(b)(1)(ii)(F) (g) |_| Parent Holding Company, in accordance with ss.240.13d-1(b)(ii)(G) (Note: See Item 7) (h) |_| Group, in accordance with ss.240.13d-1(b)(1)(ii)(H) Item 4. Ownership (a) Amount Beneficially Owned 6,050,716* (b) Percent of Class 28.0% (c) Number of shares as to which such person has: (i) sole power to vote or to direct the vote 6,050,716* (ii) shared power to vote or to direct the vote Not Applicable (iii) sole power to dispose or direct the disposition of 6,050,716* (iv) shared power to dispose or direct the disposition of Not Applicable *Includes 540,000 shares held in trust for the benefit of Dr. Truchard for which he is trustee. 0280544.01 CUSIP No. 636518 10 2 Page 4 of _5_ Pages -------------------------------------- Item 5. Ownership of Five Percent or Less of a Class If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more that five percent of the class of securities, check the following |_|. NOT APPLICABLE Item 6. Ownership of More than Five Percent on Behalf of Another Person. NOT APPLICABLE Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company. NOT APPLICABLE Item 8. Identification and Classification of Members of the Group NOT APPLICABLE Item 9. Notice of Dissolution of Group NOT APPLICABLE 0280544.01 CUSIP No. 636518 10 2 Page 5 of _5_ Pages ------------------------------------- Item 10. By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired in the ordinary course of business and were not acquired for the purpose of and do not have the effect of changing or influencing the control of the issuer of such securities and were not acquired in connection with or as a participant in any transaction having such purposes or effect. SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Date Feb. 13, 1997 /s/ JAMES J. TRUCHARD Signature James J. Truchard/President Name/Title 0280544.01