<SEC-DOCUMENT>0001104659-23-004239-index.html : 20230117 <SEC-HEADER>0001104659-23-004239.hdr.sgml : 20230117 <ACCEPTANCE-DATETIME>20230117160210 ACCESSION NUMBER: 0001104659-23-004239 CONFORMED SUBMISSION TYPE: DEFA14A PUBLIC DOCUMENT COUNT: 3 FILED AS OF DATE: 20230117 DATE AS OF CHANGE: 20230117 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: 1002 FILING VALUES: FORM TYPE: DEFA14A SEC ACT: 1934 Act SEC FILE NUMBER: 000-19655 FILM NUMBER: 23531564 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>tm233327d2_defa14a.htm <DESCRIPTION>DEFA14A <TEXT> Document 1 - file: tm233327d2_defa14a.htm
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>2 <FILENAME>tm233327d2_defa14aimg001.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 2 - file: tm233327d2_defa14aimg001.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>3 <FILENAME>tm233327d2_defa14aimg002.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 3 - file: tm233327d2_defa14aimg002.jpg
</DOCUMENT> </SEC-DOCUMENT>