-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, IvsHe6i6BuyKurP7Yt/M6Ol2nr+VelbD8eN92dmItby1BZqiLvGzQ4uCI2FzQA6o BYhH/TW/vqbzBrHMgCQ0Tg== 0000073076-97-000035.txt : 19970211 0000073076-97-000035.hdr.sgml : 19970211 ACCESSION NUMBER: 0000073076-97-000035 CONFORMED SUBMISSION TYPE: SC 13G/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 19970207 SROS: NASD SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: TETRA TECH INC CENTRAL INDEX KEY: 0000831641 STANDARD INDUSTRIAL CLASSIFICATION: SERVICES-ENGINEERING SERVICES [8711] IRS NUMBER: 954148514 STATE OF INCORPORATION: DE FISCAL YEAR END: 0930 FILING VALUES: FORM TYPE: SC 13G/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-43035 FILM NUMBER: 97519998 BUSINESS ADDRESS: STREET 1: 670 N ROSEMEAD BOULEVARD CITY: PASEDENA STATE: CA ZIP: 91107-2190 BUSINESS PHONE: 8184496400 MAIL ADDRESS: STREET 1: 670 N ROSEMEAD BLVD CITY: PASADENA STATE: CA ZIP: 91107 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: NORTHWESTERN MUTUAL LIFE INSURANCE CO CENTRAL INDEX KEY: 0000073076 STANDARD INDUSTRIAL CLASSIFICATION: UNKNOWN SIC - 0000 [0000] IRS NUMBER: 390509570 STATE OF INCORPORATION: WI FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G/A BUSINESS ADDRESS: STREET 1: 720 E WISCONSIN AVENUE CITY: MILWAUKEE STATE: WI ZIP: 53202 BUSINESS PHONE: 4142711444 MAIL ADDRESS: STREET 1: 720 EAST WISCONSIN AVENUE CITY: MILWAUKEE STATE: WI ZIP: 53202 SC 13G/A 1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* TETRA TECH, INC. (Name of Issuer) Common Stock (Title of Class of Securities) 88162G 10 3 (CUSIP Number) *The remainder of this cover page shall be filled out for a reporting person's initial filing on 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). Page 1 of 6 pages 1. NAMES OF REPORTING PERSONS S.S. or I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS The Northwestern Mutual Life Insurance Company 39-0509570 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a) [ ] (b) [ ] 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION: Wisconsin NUMBER OF 5. SOLE VOTING POWER SHARES BENEFICIALLY 386,968 OWNED BY EACH 6. SHARED VOTING POWER REPORTING PERSON 547,532 WITH 7. SOLE DISPOSITIVE POWER 386,968 8. SHARED DISPOSITIVE POWER 547,532 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON: 934,500 10. CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (See Instructions): N/A 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9: 6.6% 12. TYPE OF REPORTING PERSON (See Instructions): IC Item 1 (a) Name of Issuer: Tetra Tech, Inc. (b) Address of Issuer's Principal Executive Offices: 630 North Rosemead Boulevard, Pasadena, CA 91107 Item 2 (a) Name of Person Filing: The Northwestern Mutual Life Insurance Company (b) Address of Principal Business Office: 720 East Wisconsin Avenue, Milwaukee, Wisconsin 53202 (c) Citizenship or Place of Organization: Wisconsin (d) Title of Class of Securities: Common Stock (e) CUSIP Number: 88162G 10 3 Item 3 If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b), check whether the person filing is a: (a) [ ] Broker or Dealer registered under Section 15 of the Act (b) [ ] Bank as defined in section 3(a)(6) of the Act (c) [X] 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 section 240.13d-1(b)(1)(ii)(F) (g) [ ] Parent Holding Company, in accordance with section 240.13d-1(b)(ii)(G) (Note: See Item 7) (h) [ ] Group, in accordance with section 240.13d-1(b)(1)(ii)(H) Item 4 Ownership If the percent of the class owned, as of December 31 of the year covered by the statement, or as of the last day of any month described in Rule 13d-1(b)(2), if applicable, exceeds five percent, provide the following information as of that date and identify those shares which there is a right to acquire. (a) Amount Beneficially Owned: 934,500 shares. Of such amount, (i) 464,737 shares are owned by the Growth Stock Portfolio of Northwestern Mutual Series Fund, Inc., a wholly owned subsidiary of The Northwestern Mutual Life Insurance Company, and (ii) 82,795 shares are held in The Northwestern Mutual Life Insurance Company Group Annuity Separate Account. (b) Percent of Class: 6.6% (c) Number of shares as to which such person has: (i) sole power to vote or to direct the vote: 386,968 (ii) shared power to vote or to direct the vote: 547,532 (iii) sole power to dispose or to direct the disposition of: 386,968 (iv) shared power to dispose or to direct the disposition of: 547,532 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 than five percent of the class of securities, check the following [ ]. Item 6 Ownership of More than Five Percent on Behalf of Another Person: N/A Item 7 Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company: N/A Item 8 Identification and Classification of Members of the Group: N/A Item 9 Notice of Dissolution of Group: N/A Item 10 Certification 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 of 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. February 5, 1997 THE NORTHWESTERN MUTUAL LIFE INSURANCE COMPANY By: /s/ John M. Bremer John M. Bremer Senior Vice President, General Counsel and Secretary 60171 CUSIP NO.: 88162G 10 3 13G Page 6 of 6 PagesAmendment No. 1 -----END PRIVACY-ENHANCED MESSAGE-----