<SEC-DOCUMENT>0001104659-23-004232-index.html : 20230117 <SEC-HEADER>0001104659-23-004232.hdr.sgml : 20230117 <ACCEPTANCE-DATETIME>20230117160052 ACCESSION NUMBER: 0001104659-23-004232 CONFORMED SUBMISSION TYPE: DEF 14A PUBLIC DOCUMENT COUNT: 39 CONFORMED PERIOD OF REPORT: 20230228 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: DEF 14A SEC ACT: 1934 Act SEC FILE NUMBER: 000-19655 FILM NUMBER: 23531549 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>DEF 14A <SEQUENCE>1 <FILENAME>tm233327-1_def14a.htm <DESCRIPTION>DEF 14A <TEXT> Document 1 - file: tm233327-1_def14a.htm
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>2 <FILENAME>bc_1yrtsr-pn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 2 - file: bc_1yrtsr-pn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>3 <FILENAME>bc_3yrtsr-pn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 3 - file: bc_3yrtsr-pn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>4 <FILENAME>bc_nominee-pn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 4 - file: bc_nominee-pn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>5 <FILENAME>bc_targettdc-pn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 5 - file: bc_targettdc-pn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>6 <FILENAME>cv_obc-4c.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 6 - file: cv_obc-4c.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>7 <FILENAME>cv_ofc-4c.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 7 - file: cv_ofc-4c.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>8 <FILENAME>fc_aip-pn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 8 - file: fc_aip-pn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>9 <FILENAME>fc_aipaward-pn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 9 - file: fc_aipaward-pn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>10 <FILENAME>fc_areas-pn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 10 - file: fc_areas-pn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>11 <FILENAME>ic_donot-pn.gif <DESCRIPTION>GRAPHIC <TEXT> Document 11 - file: ic_donot-pn.gif
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>12 <FILENAME>ic_tick-pn.gif <DESCRIPTION>GRAPHIC <TEXT> Document 12 - file: ic_tick-pn.gif
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>13 <FILENAME>lg_tetratech-4c.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 13 - file: lg_tetratech-4c.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>14 <FILENAME>pc_annual-pn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 14 - file: pc_annual-pn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>15 <FILENAME>pc_ceoneo-pn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 15 - file: pc_ceoneo-pn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>16 <FILENAME>pc_directordiversity-pn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 16 - file: pc_directordiversity-pn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>17 <FILENAME>pc_directornominees-pn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 17 - file: pc_directornominees-pn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>18 <FILENAME>ph_christianaobiaya-bwlr.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 18 - file: ph_christianaobiaya-bwlr.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>19 <FILENAME>ph_danbatrack-bw.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 19 - file: ph_danbatrack-bw.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>20 <FILENAME>ph_danbatrack-bwlr.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 20 - file: ph_danbatrack-bwlr.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>21 <FILENAME>ph_garyrbirken-bwlr.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 21 - file: ph_garyrbirken-bwlr.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>22 <FILENAME>ph_kenneththom-bwlr.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 22 - file: ph_kenneththom-bwlr.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>23 <FILENAME>ph_kimberlyrit-bwlr.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 23 - file: ph_kimberlyrit-bwlr.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>24 <FILENAME>ph_kirstenvolp-bwlr.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 24 - file: ph_kirstenvolp-bwlr.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>25 <FILENAME>ph_maguirejoanne22-bw.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 25 - file: ph_maguirejoanne22-bw.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>26 <FILENAME>ph_prashantgandhi-bwlr.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 26 - file: ph_prashantgandhi-bwlr.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>27 <FILENAME>px_annual-bw.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 27 - file: px_annual-bw.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>28 <FILENAME>px_scanto-bw.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 28 - file: px_scanto-bw.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>29 <FILENAME>sg_danbatrack-bw.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 29 - file: sg_danbatrack-bw.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>30 <FILENAME>sg_prestonhopson-bw.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 30 - file: sg_prestonhopson-bw.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>31 <FILENAME>tbl_awardbusiness-pn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 31 - file: tbl_awardbusiness-pn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>32 <FILENAME>tbl_ceoneo-pn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 32 - file: tbl_ceoneo-pn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>33 <FILENAME>tbl_outreach-pn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 33 - file: tbl_outreach-pn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>34 <FILENAME>tbl_tenure-pn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 34 - file: tbl_tenure-pn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>35 <FILENAME>tm2025328d89-icon_interpn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 35 - file: tm2025328d89-icon_interpn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>36 <FILENAME>tm2025328d89-icon_mailpn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 36 - file: tm2025328d89-icon_mailpn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>37 <FILENAME>tm2025328d89-icon_personpn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 37 - file: tm2025328d89-icon_personpn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>38 <FILENAME>tm2025328d89-icon_telepn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 38 - file: tm2025328d89-icon_telepn.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>39 <FILENAME>tm2025328d89-icon_waterpn.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 39 - file: tm2025328d89-icon_waterpn.jpg
</DOCUMENT> </SEC-DOCUMENT>