Catherine Corrigan - Oct 15, 2025 Form 4 Insider Report for EXPONENT INC (EXPO)

Signature
By: Wendy Whitehouse For: Catherine Corrigan
Stock symbol
EXPO
Transactions as of
Oct 15, 2025
Transactions value $
-$178,345
Form type
4
Date filed
10/16/2025, 04:25 PM
Previous filing
Sep 16, 2025

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Corrigan Catherine President & CEO, Director 149 COMMONWEALTH DRIVE, MENLO PARK By: Wendy Whitehouse For: Catherine Corrigan 2025-10-16 0001552213

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction EXPO Common Stock Options Exercise $82K +3.23K +3.9% $25.41 86K Oct 15, 2025 Direct
transaction EXPO Common Stock Sale -$216K -3.23K -3.75% $66.84 82.8K Oct 15, 2025 Direct
transaction EXPO Common Stock Options Exercise $69.1K +2.38K +2.88% $29.05 85.1K Oct 15, 2025 Direct
transaction EXPO Common Stock Sale -$114K -1.7K -2% $66.79 83.4K Oct 15, 2025 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction EXPO Non-Qualified Stock Option (right to buy) Options Exercise -3.23K -12.5% 22.6K Oct 15, 2025 Common Stock 3.23K $25.41 Direct F2, F3
transaction EXPO Non-Qualified Stock Option (right to buy) Options Exercise -2.38K -10% 21.4K Oct 15, 2025 Common Stock 2.38K $29.05 Direct F2, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id Content
F1 Stock sale was to cover the option exercise price and taxes.
F2 The stock option becomes exercisable in four equal annual installments.
F3 Not applicable.