<SEC-DOCUMENT>0001104659-25-004097-index.html : 20250116
<SEC-HEADER>0001104659-25-004097.hdr.sgml : 20250116
<ACCEPTANCE-DATETIME>20250116160137
ACCESSION NUMBER:		0001104659-25-004097
CONFORMED SUBMISSION TYPE:	ARS
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20240929
FILED AS OF DATE:		20250116
DATE AS OF CHANGE:		20250116
EFFECTIVENESS DATE:		20250116

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TETRA TECH INC
		CENTRAL INDEX KEY:			0000831641
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-ENGINEERING SERVICES [8711]
		ORGANIZATION NAME:           	07 Trade & Services
		IRS NUMBER:				954148514
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0929

	FILING VALUES:
		FORM TYPE:		ARS
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-19655
		FILM NUMBER:		25535724

	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>ARS
<SEQUENCE>1
<FILENAME>tm2431363d3_ars.pdf
<DESCRIPTION>ARS
<TEXT>
Document 1 - file: tm2431363d3_ars.pdf

</DOCUMENT>
</SEC-DOCUMENT>