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)
88162G103
(CUSIP Number)
December 29, 2006
(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).
CUSIP: 88162G103 Page 1 of 7
1 NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Capital Research and Management Company
95-1411037
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
Delaware
5 SOLE VOTING POWER
315,400
6 SHARED VOTING POWER
NUMBER OF
SHARES NONE
BENEFICIALL
Y OWNED BY
7 SOLE DISPOSITIVE POWER
EACH
REPORTING 315,400
PERSON
WITH:
8 SHARED DISPOSITIVE POWER
NONE
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
315,400 Beneficial ownership disclaimed pursuant to Rule 13d-4
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS)
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
0.5%
12 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
IA
CUSIP: 88162G103 Page 2 of 7
1 NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
SMALLCAP World Fund, Inc.
95-4253845
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
Maryland
5 SOLE VOTING POWER
NONE
6 SHARED VOTING POWER
NUMBER OF
SHARES NONE
BENEFICIALL
Y OWNED BY
7 SOLE DISPOSITIVE POWER
EACH
REPORTING NONE
PERSON
WITH:
8 SHARED DISPOSITIVE POWER
NONE
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
240,500
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS)
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
0.4%
12 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
IV
CUSIP: 88162G103 Page 3 of 7
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549
Schedule 13G
Under the Securities Exchange Act of 1934
Amendment No. 1
Item 1(a) Name of Issuer:
Tetra Tech Inc.
Item 1(b) Address of Issuer's Principal Executive Offices:
3475 East Foothill Blvd
Pasadena CA 91107
Item 2(a) Name of Person(s) Filing:
Capital Research and Management Company and SMALLCAP World
Fund, Inc.
Item 2(b) Address of Principal Business Office or, if none,
Residence:
333 South Hope Street
Los Angeles, CA 90071
Item 2(c) Citizenship: N/A
Item 2(d) Title of Class of Securities:
Common Stock
Item 2(e) CUSIP Number:
88162G103
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:
(d) [X] Investment company registered under section 8
of the Investment Company Act of 1940 (15 U.S.C. 80a-8).
(e) [X] An investment adviser in accordance with
section 240.13d-1(b)(1)(ii)(E).
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.
See pages 2 and 3
(a) Amount beneficially owned:
(b) Percent of class:
(c) Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
(ii) Shared power to vote or to direct the vote:
(iii) Sole power to dispose or to direct the disposition of:
(iv) Shared power to dispose or to direct the disposition of:
CUSIP: 88162G103 Page 4 of 7
Capital Research and Management Company, an investment adviser
registered under Section 203 of the Investment Advisers Act of
1940 is deemed to be the beneficial owner of 315,400 shares or
0.5% of the 57,732,712 shares of Common Stock believed to be
outstanding as a result of acting as investment adviser to
various investment companies registered under Section 8 of the
Investment Company Act of 1940.
SMALLCAP World Fund, Inc., an investment company registered
under the Investment Company Act of 1940, which is advised by
Capital Research and Management Company, is the beneficial
owner of 240,500 shares or 0.4% of the 57,732,712 shares of
Common Stock believed to be outstanding.
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: [X]
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 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.
Date: February 7, 2007
Signature: *Paul G. Haaga, Jr.
Name/Title: Paul G. Haaga, Jr., Executive Vice
President
Capital Research and Management Company
CUSIP: 88162G103 Page 5 of 7
Date: February 7, 2007
Signature: *Chad L. Norton
Name/Title: Chad L. Norton, Secretary
SMALLCAP World Fund, Inc.
*By /s/ Liliane Corzo
Liliane Corzo
Attorney-in-fact
Signed pursuant to a Power of Attorney dated November 14,
2006 included as an Exhibit to Schedule 13F filed with the
Securities and Exchange Commission by Capital Research and
Management Company on November 14, 2006.
CUSIP: 88162G103 Page 6 of 7
AGREEMENT
Los Angeles, CA
February 7, 2007
Capital Research and Management Company ("CRMC") and SMALLCAP World
Fund, Inc. ("SCWF") hereby agree to file a joint statement on Schedule
13G under the Securities Exchange Act of 1934 (the "Act") in connection
with their beneficial ownership of Common Stock issued by Tetra Tech
Inc.
CRMC and SCWF state that they are each entitled to individually use
Schedule 13G pursuant to Rule 13d-1(c) of the Act.
CRMC and SCWF are each responsible for the timely filing of the
statement and any amendments thereto, and for the completeness and
accuracy of the information concerning each of them contained therein
but are not responsible for the completeness or accuracy of the
information concerning the others.
CAPITAL RESEARCH AND MANAGEMENT COMPANY
BY: *Paul G. Haaga, Jr.
Paul G. Haaga, Jr., Executive
Vice President
Capital Research and Management
Company
SMALLCAP WORLD FUND, INC.
BY: *Chad L. Norton
Chad L. Norton, Secretary
SMALLCAP World Fund, Inc.
*By /s/ Liliane Corzo
Liliane Corzo
Attorney-in-fact
Signed pursuant to a Power of Attorney dated November 14, 2006
included as an Exhibit to Schedule 13F filed with the Securities
and Exchange Commission by Capital Research and Management Company
on November 14, 2006.
CUSIP: 88162G103 Page 7 of 7