<SEC-DOCUMENT>0001104659-15-002664-index.html : 20150115 <SEC-HEADER>0001104659-15-002664.hdr.sgml : 20150115 <ACCEPTANCE-DATETIME>20150115171054 ACCESSION NUMBER: 0001104659-15-002664 CONFORMED SUBMISSION TYPE: DEFA14A PUBLIC DOCUMENT COUNT: 5 FILED AS OF DATE: 20150115 DATE AS OF CHANGE: 20150115 EFFECTIVENESS DATE: 20150115 FILER: 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: 0928 FILING VALUES: FORM TYPE: DEFA14A SEC ACT: 1934 Act SEC FILE NUMBER: 000-19655 FILM NUMBER: 15530575 BUSINESS ADDRESS: STREET 1: 3475 EAST FOOTHILL BOULEVARD CITY: PASADENA STATE: CA ZIP: 91107 BUSINESS PHONE: 6263514664 MAIL ADDRESS: STREET 1: 3475 EAST FOOTHILL BOULEVARD CITY: PASADENA STATE: CA ZIP: 91107 </SEC-HEADER> <DOCUMENT> <TYPE>DEFA14A <SEQUENCE>1 <FILENAME>a15-2157_3defa14a.htm <DESCRIPTION>DEFA14A <TEXT> Document 1 - file: a15-2157_3defa14a.htm
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>2 <FILENAME>g21573bci001.gif <DESCRIPTION>GRAPHIC <TEXT> Document 2 - file: g21573bci001.gif
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>3 <FILENAME>g21573bci002.gif <DESCRIPTION>GRAPHIC <TEXT> Document 3 - file: g21573bci002.gif
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>4 <FILENAME>g21573bci003.gif <DESCRIPTION>GRAPHIC <TEXT> Document 4 - file: g21573bci003.gif
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>5 <FILENAME>g21573bci004.gif <DESCRIPTION>GRAPHIC <TEXT> Document 5 - file: g21573bci004.gif
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