[Form 4] EXPONENT INC Insider Trading Activity

Rhea-AI Filing Summary

Catherine Corrigan, President & CEO and director of Exponent Inc (EXPO), reported multiple transactions on 09/15/2025. She exercised two non-qualified stock option tranches: 2,380 options at a $29.05 exercise price and 3,226 options at a $25.405 exercise price, resulting in 5,606 shares acquired. Concurrently she sold 1,679 shares and separately sold 3,226 shares; one sale was described as to cover the option exercise price and taxes. After these trades her beneficial ownership is reported as 82,753 shares (direct). The Form 4 was signed on 09/16/2025 by an authorized filer.

Positive

• Timely disclosure of option exercises and sales via Form 4 filed and signed on 09/16/2025
• Option exercises increased the reporting person's direct share count before sales, consistent with compensation exercise
• Sale documented as tax/price cover, explaining part of the disposition

Negative

• Reported sales reduced direct holdings from pre-transaction levels to 82,753 shares
• Concurrent sales on the exercise date may reduce perceived insider ownership despite exercises

Insights

Financial Analyst

TL;DR: Insider exercised options and sold portions to cover costs; net direct holdings remain material but overall disclosure is routine.

The filing shows option exercises and concurrent open-market sales on the same date. Exercising 5,606 options increased the number of shares acquired, while reported sales of 4,905 shares reduced immediate holdings; one sale is explicitly to cover exercise price and taxes. The transactions affect the CEO's direct share count reported as 82,753 shares. These are standard Section 16 transactions reflecting compensation exercise mechanics rather than an outright strategic divestiture.

Corporate Governance Expert

TL;DR: Timely disclosure of option exercises and related sales demonstrates compliance with Section 16 filing obligations.

The Form 4 documents the CEO's exercises of non-qualified stock options that vest in installments and related share sales. The explanation that one sale was to cover exercise price and taxes aligns with common practice. The filing is signed by an authorized representative, indicating proper procedural handling. No indication in the form of unusual derivative structures or undisclosed related-party arrangements.

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

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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^*

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)
09/15/2025

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	09/15/2025		M		2,380	A	$29.05	84,432	D
Common Stock	09/15/2025		S(1)		1,679	D	$70.1806	82,753	D
Common Stock	09/15/2025		M		3,226	A	$25.405	85,979	D
Common Stock	09/15/2025		S		3,226	D	$69.7673	82,753	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	09/15/2025		M			3,226	(2)	07/29/2026	Common Stock	3,226	(3)	25,804	D
Non-Qualified Stock Option (right to buy)	$29.05	09/15/2025		M			2,380	(2)	02/16/2027	Common Stock	2,380	(3)	23,798	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	09/16/2025
	** 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.
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FAQ

What transactions did EXPO insider Catherine Corrigan report on Form 4?

The Form 4 reports option exercises of 2,380 shares at a $29.05 exercise price and 3,226 shares at a $25.405 exercise price, plus sales of 1,679 and 3,226 shares on 09/15/2025.

Why were some shares sold according to the filing?

The filing explains that one stock sale was to cover the option exercise price and taxes.

What is Catherine Corrigan's reported beneficial ownership after these transactions?

Following the reported transactions the filing shows 82,753 shares beneficially owned (direct).

Were derivative securities involved in the Form 4 filing for EXPO?

Yes. The filing shows two non-qualified stock options exercisable over installments with exercise prices of $25.405 and $29.05 and resulting underlying common shares.

When were the transactions and when was the Form 4 signed?

Transactions occurred on 09/15/2025 and the Form 4 is signed for the reporting person on 09/16/2025.