Catherine Corrigan - 17 Aug 2026 Form 4 Insider Report for EXPONENT INC (EXPO)

Reporting relationship: Chief Executive Officer, Director
Issuer ticker: EXPO
Reported as of: 17 Aug 2026
Net transaction value: -$113,136
SEC form: 4
Accepted by SEC: 18 Aug 2026, 21:43:07 UTC
Prior SEC filing: 30 Jul 2026
Source filing: View source filing
Reporting owner signature: By: Wendy Whitehouse For: Catherine Corrigan

Key filing fact

Catherine Corrigan filed Form 4 for EXPONENT INC (EXPO) on 18 Aug 2026.

Key facts

This page summarizes Catherine Corrigan's Form 4 filing for EXPONENT INC (EXPO).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 18 Aug 2026, 21:43.

Change

Previous filing in this sequence was filed on 30 Jul 2026.
Current net transaction value: -$113,136.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001552213 Primary reporting owner

Corrigan Catherine

Relationship: Chief Executive Officer, Director
Address: 149 COMMONWEALTH DRIVE, MENLO PARK
Signature: By: Wendy Whitehouse For: Catherine Corrigan
Signature date: 18 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

EXPO transaction

Common Stock

Options Exercise

Transaction value
Shares: +2,379
Change %: +1.9%
Price: $29.05^*
Shares after: 130,815
Date: 17 Aug 2026
Ownership: Direct

EXPO transaction

Common Stock

Sale

Transaction value: $113,136
Shares: -1,707
Change %: -1.3%
Price: $66.28
Shares after: 129,108
Date: 17 Aug 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

EXPO transaction Derivative

Non-Qualified Stock Option (right to buy)

Options Exercise

Transaction value
Shares: -2,379
Change %: -100%
Price
Shares after: 0
Date: 17 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 2,379
Exercise price: $29.05
Footnotes: F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 3 footnotes

Footnote F1

Stock sale was to cover the option exercise price and taxes.

Footnote F2

The stock option becomes exercisable in four equal annual installments.

Footnote F3

Not applicable.