-----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, DtVmeeVRrQryXcl/CJudPmTjZRhc3fqMGClMvmcdgbayj1d1bzSTaevpV3q444ry VqyIptrksdWIz3dDK+usLw== 0000950124-02-000259.txt : 20020414 0000950124-02-000259.hdr.sgml : 20020414 ACCESSION NUMBER: 0000950124-02-000259 CONFORMED SUBMISSION TYPE: SC 13G/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20020207 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: 005-42106 FILM NUMBER: 02529939 BUSINESS ADDRESS: STREET 1: 670 N ROSEMEAD BOULEVARD CITY: PASEDENA STATE: CA ZIP: 91107-2190 BUSINESS PHONE: 6263514664 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: 4142992508 MAIL ADDRESS: STREET 1: 720 EAST WISCONSIN AVENUE CITY: MILWAUKEE STATE: WI ZIP: 53202 SC 13G/A 1 c67379asc13ga.txt SCHEDULE 13G/A SCHEDULE 13G (RULE 13d-102) Information to be Included in Statements Filed Pursuant to Rule 13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to Rule 13d-2. SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 Under the Securities Exchange Act of 1934 (Amendment No. 4)* TETRA TECH, INC. - -------------------------------------------------------------------------------- (Name of Issuer) Common Stock - -------------------------------------------------------------------------------- (Title of Class of Securities) 88162G 10 3 - -------------------------------------------------------------------------------- (CUSIP Number) December 31, 2001 - -------------------------------------------------------------------------------- (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [X] Rule 13d-1(b) [ ] Rule 13d-1(c) [ ] Rule 13d-1(d) *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 13G CUSIP NO. 88162G 10 3 AMENDMENT NO. 4 PAGE 2 OF 6 PAGES - -------------------------------------------------------------------------------- 1 Names of Reporting Persons/I.R.S. Identification Nos. of Above Persons (Entities Only) The Northwestern Mutual Life Insurance Company 39-0509570 - -------------------------------------------------------------------------------- 2 Check the Appropriate Box if a Member of a Group (a) [ ] (See Instructions) (b) [ ] - -------------------------------------------------------------------------------- 3 SEC Use Only - -------------------------------------------------------------------------------- 4 Citizenship or Place of Organization Wisconsin - -------------------------------------------------------------------------------- Number of 5 Sole Voting Power Shares 1,009,993 ----------------------------------------------------- Beneficially 6 Shared Voting Power 1,867,056 Owned by ----------------------------------------------------- 7 Sole Dispositive Power Each 1,009,993 ----------------------------------------------------- Reporting 8 Shared Dispositive Power 1,867,056 Person With - -------------------------------------------------------------------------------- 9 Aggregate Amount Beneficially Owned by Each Reporting Person 2,877,049 - -------------------------------------------------------------------------------- 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) 5.5% - -------------------------------------------------------------------------------- 12 Type of Reporting Person (See Instructions) IC - -------------------------------------------------------------------------------- CUSIP NO. 88162G 10 3 13G Page 3 of 6 Pages AMENDMENT NO. 4 ITEM 1 (a) Name of Issuer: Tetra Tech, Inc. (b) Address of Issuer's Principal Executive Offices: 670 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 SECTIONS 240.13d-1(b), OR 240.13d-2(b) OR (c), 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 of 1940 (e) / / An investment adviser in accordance with section 240.13d-1(b)(1)(ii)(E) (f) / / An employee benefit plan or endowment fund in accordance with section 240.13d-1(b)(1)(ii)(F) (g) / / A parent holding company or control person in accordance with section 240.13d-1(b)(1)(ii)(G) CUSIP NO. 88162G 10 3 13G Page 4 of 6 Pages AMENDMENT NO. 4 (h) / / A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (i) / / A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (j) / / Group, in accordance with section 240.13d-1(b)(1)(ii)(J) ITEM 4 OWNERSHIP Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1. (a) Amount Beneficially Owned: 2,877,049 shares. Of such amount, (i) 6,750 shares are owned by the Asset Allocation Portfolio, 1,256,347 shares are owned by the Growth Stock Portfolio and 297,625 shares are owned by the Small Cap Aggressive Growth Stock Portfolio of Northwestern Mutual Series Fund, Inc., an affiliate of The Northwestern Mutual Life Insurance Company and a registered investment company; (ii) 273,116 shares are owned by The Northwestern Mutual Life Insurance Company Group Annuity Separate Account; (iii) 12,000 shares are owned by the Asset Allocation Fund and 14,750 shares are owned by the Small Cap Growth Stock Fund of Mason Street Funds, Inc., an affiliate of The Northwestern Mutual Life Insurance Company and a registered investment company; and (iv) 6,468 shares are owned by Northwestern Long Term Care Insurance Company, a wholly owned subsidiary of The Northwestern Mutual Life Insurance Company. As of December 31, 2001, Northwestern Mutual Investment Services, LLC, a wholly owned company of The Northwestern Mutual Life Insurance Company and a registered investment advisor, served as an investment advisor to the Asset Allocation Portfolio, Growth Stock Portfolio and Small Cap Aggressive Growth Stock Portfolio of Northwestern Mutual Series Fund, Inc., Asset Allocation Fund and Small Cap Growth Stock Fund of Mason Street Funds, Inc., and Northwestern Long Term Care Insurance Company. As of December 31, 2001, Northwestern Investment Management Company, LLC, of which The Northwestern Mutual Life CUSIP NO. 88162G 10 3 13G Page 5 of 6 Pages AMENDMENT NO. 4 Insurance Company is the sole member, served as an investment advisor to The Northwestern Mutual Life Insurance Company. (b) Percent of Class: 5.5% (c) Number of shares as to which such person has: (i) Sole power to vote or to direct the vote: 1,009,993 (ii) Shared power to vote or to direct the vote: 1,867,056 (iii) Sole power to dispose or to direct the disposition of: 1,009,993 (iv) Shared power to dispose or to direct the disposition of: 1,867,056 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 OR CONTROL PERSON: 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 and are held in the ordinary course of business and CUSIP NO. 88162G 10 3 13G Page 6 of 6 Pages AMENDMENT NO. 4 were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose 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. February 1, 2002 THE NORTHWESTERN MUTUAL LIFE INSURANCE COMPANY By: /s/ Robert J. Berdan Robert J. Berdan Vice President, General Counsel and Secretary -----END PRIVACY-ENHANCED MESSAGE-----