# EDGAR Filing Document

**Accession Number:** 0000851520
**File Stem:** 0000851520-26-000066
**Filing Date:** 2026-5
**Character Count:** 4873
**Document Hash:** 3cef3989bfc24c1587d33a3448294c0d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000851520-26-000066.hdr.sgml**: 20260512

**ACCESSION NUMBER**: 0000851520-26-000066

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260501

**FILED AS OF DATE**: 20260512

**DATE AS OF CHANGE**: 20260512

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** ANDERSON ERIC R
- **CENTRAL INDEX KEY:** 0001243832

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-18655
- **FILM NUMBER:** 26970137
**ISSUER**: 

**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:** 0101

**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

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>ANDERSON ERIC R<br><sub>(Last) (First) (Middle)</sub><br>149 COMMONWEALTH DRIVE<br><sub>(Street)</sub><br>MENLO PARK, CA 94025<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>EXPONENT INC [ EXPO ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-05-01 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director   [ ] 10% Owner<br>[X] Officer (give title below)   [ ] Other (specify below)<br>_Chief Financial Officer_ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Common Stock | 2955 | D |  |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| Incentive Stock Option (right to buy) | <sup>(1)</sup> | 2036-04-06 | Common Stock | 6008 | $66.56 | D |  |
| Non-Qualified Stock Option (right to buy) | <sup>(1)</sup> | 2036-04-06 | Common Stock | 6592 | $65.56 | D |  |
| Restricted Stock Units | 2027-03-10 | 2027-03-10 | Common Stock | 3000 | <sup>(2)</sup> | D |  |
| Restricted Stock Units | 2028-03-15 | 2028-03-15 | Common Stock | 3538 | <sup>(2)</sup> | D |  |
| Restricted Stock Units | 2029-03-14 | 2029-03-14 | Common Stock | 3628 | <sup>(2)</sup> | D |  |
| Restricted Stock Units | 2030-03-13 | 2030-03-13 | Common Stock | 4750 | <sup>(2)</sup> | D |  |

---

### Footnotes:

(1) The stock option becomes exercisable in four equal annual installments.

(2) 1-for-1.

**Signature:** By: Wendy Whitehouse For: Eric R. Anderson  
**Date:** 2026-05-11

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**