<SEC-DOCUMENT>0000950170-25-056320-index.html : 20250421
<SEC-HEADER>0000950170-25-056320.hdr.sgml : 20250421
<ACCEPTANCE-DATETIME>20250421163035
ACCESSION NUMBER:		0000950170-25-056320
CONFORMED SUBMISSION TYPE:	DEF 14A
PUBLIC DOCUMENT COUNT:		21
CONFORMED PERIOD OF REPORT:	20250605
FILED AS OF DATE:		20250421
DATE AS OF CHANGE:		20250421

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			EXPONENT INC
		CENTRAL INDEX KEY:			0000851520
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MANAGEMENT CONSULTING SERVICES [8742]
		ORGANIZATION NAME:           	07 Trade & Services
		EIN:				770218904
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0103

	FILING VALUES:
		FORM TYPE:		DEF 14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-18655
		FILM NUMBER:		25853711

	BUSINESS ADDRESS:	
		STREET 1:		EXPONENT INC
		STREET 2:		149 COMMONWEALTH DRIVE
		CITY:			MENLO PARK
		STATE:			CA
		ZIP:			94025
		BUSINESS PHONE:		650-326-9400

	MAIL ADDRESS:	
		STREET 1:		EXPONENT INC
		STREET 2:		149 COMMONWEALTH DRIVE
		CITY:			MENLO PARK
		STATE:			CA
		ZIP:			94025

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FAILURE GROUP INC
		DATE OF NAME CHANGE:	19930831
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEF 14A
<SEQUENCE>1
<FILENAME>expo-20250421.htm
<DESCRIPTION>DEF 14A
<TEXT>
Document 1 - file: expo-20250421.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>img39747903_0.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: img39747903_0.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>img39747903_1.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: img39747903_1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>img39747903_2.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: img39747903_2.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>img39747903_3.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: img39747903_3.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>img39747903_4.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: img39747903_4.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>img39747903_5.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: img39747903_5.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>img39747903_6.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: img39747903_6.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>img39747903_7.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: img39747903_7.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>10
<FILENAME>expo-20250421.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA WITH EMBEDDED LINKBASES DOCUMENT
<TEXT>
Document 10 - file: expo-20250421.xsd

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>12
<FILENAME>R1.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 12 - file: R1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>13
<FILENAME>R2.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 13 - file: R2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>14
<FILENAME>R3.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 14 - file: R3.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>15
<FILENAME>R4.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 15 - file: R4.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>16
<FILENAME>Show.js
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 16 - file: Show.js

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>17
<FILENAME>report.css
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 17 - file: report.css

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>19
<FILENAME>FilingSummary.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 19 - file: FilingSummary.html

Document 19 - RAW XML: FilingSummary.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>JSON
<SEQUENCE>21
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 21 - file: MetaLinks.json

</DOCUMENT>
<DOCUMENT>
<TYPE>ZIP
<SEQUENCE>22
<FILENAME>0000950170-25-056320-xbrl.zip
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 22 - file: 0000950170-25-056320-xbrl.zip

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>23
<FILENAME>expo-20250421_htm.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 23 - file: expo-20250421_htm.html

Document 23 - RAW XML: expo-20250421_htm.xml

</DOCUMENT>
</SEC-DOCUMENT>