[Form 4] EXPONENT INC Insider Trading Activity

Rhea-AI Filing Summary

Exponent, Inc. (EXPO) reported insider activity by President & CEO and Director Catherine Corrigan on 10/15/2025. She exercised 3,226 options at $25.405 and 2,380 options at $29.05, then sold 3,226 shares at $66.84 and 1,704 shares at $66.7926. A footnote states the sale was to cover the option exercise price and taxes.

Following these transactions, she directly owned 83,429 shares. The options noted are non‑qualified stock options that vest in four equal annual installments.

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

X

Check this box to indicate that a 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). See Instruction 10.

1. Name and Address of Reporting Person^*

Corrigan Catherine

(Last) (First) (Middle)

149 COMMONWEALTH DRIVE

(Street)

MENLO PARK CA 94025

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
EXPONENT INC [ EXPO ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President & CEO

3. Date of Earliest Transaction (Month/Day/Year)
10/15/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/15/2025		M		3,226	A	$25.405	85,979	D
Common Stock	10/15/2025		S		3,226	D	$66.84	82,753	D
Common Stock	10/15/2025		M		2,380	A	$29.05	85,133	D
Common Stock	10/15/2025		S(1)		1,704	D	$66.7926	83,429	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Non-Qualified Stock Option (right to buy)	$25.405	10/15/2025		M			3,226	(2)	07/29/2026	Common Stock	3,226	(3)	22,578	D
Non-Qualified Stock Option (right to buy)	$29.05	10/15/2025		M			2,380	(2)	02/16/2027	Common Stock	2,380	(3)	21,418	D

Explanation of Responses:

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

2. The stock option becomes exercisable in four equal annual installments.

3. Not applicable.

	By: Wendy Whitehouse For: Catherine Corrigan	10/16/2025
	** Signature of Reporting Person	Date
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.

FAQ

What did EXPO’s CEO report on Form 4?

She exercised 3,226 options at $25.405 and 2,380 options at $29.05, then sold 3,226 shares at $66.84 and 1,704 at $66.7926 on 10/15/2025.

How many EXPO shares does the reporting person own after the transactions?

She directly owned 83,429 shares following the reported transactions.

Why were some EXPO shares sold by the CEO?

A footnote states the stock sale was to cover the option exercise price and taxes.

What type of options were exercised in the EXPO filing?

They were non‑qualified stock options with exercise prices of $25.405 and $29.05.

How do the EXPO options vest?

The options become exercisable in four equal annual installments.

What roles does the reporting person hold at EXPO?

She is President & CEO and a Director of Exponent, Inc.