What are Catherine Corrigan’s Exponent (EXPO) share holdings after these transactions?

Following the May 15, 2026 transactions, Catherine Corrigan directly owns 105,218 shares of Exponent common stock. This total reflects both the exercised options and the shares sold, as reported in the post-transaction ownership figures on the Form 4.

Were the Exponent (EXPO) CEO’s share sales part of routine option-related activity?

A footnote explains the stock sales were undertaken to cover the option exercise price and taxes. That language indicates the transactions are primarily tied to compensation and tax obligations, rather than representing a standalone, discretionary reduction in her equity exposure.

Exponent (EXPO) CEO sells shares to fund option exercise and taxes

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Exponent Inc. President & CEO Catherine Corrigan reported an option exercise and related share sales. On May 15, 2026, she exercised options for a total of 5,606 shares of common stock at strike prices of $29.05 and $25.405 per share, converting derivative awards into regular shares.

On the same date, she sold 4,194 shares of common stock in open-market transactions at an average price of $54.0595 per share. A footnote states these sales were made to cover the option exercise price and taxes, indicating a routine liquidity event rather than a purely discretionary sale. After these transactions, Corrigan directly owns 105,218 shares of Exponent common stock.

Insider Trade Summary 10b5-1

Net Seller: 4,194 shares ($226,726)

Net Sell 6 txns

Insider Corrigan Catherine

Role President & CEO

Sold 4,194 shs ($227K)

Type	Security	Shares	Price	Value
Exercise	Non-Qualified Stock Option (right to buy)	3,226	$0.00	--
Exercise	Non-Qualified Stock Option (right to buy)	2,380	$0.00	--
Exercise	Common Stock	3,226	$25.405	$82K
Sale	Common Stock	2,367	$54.0595	$128K
Exercise	Common Stock	2,380	$29.05	$69K
Sale	Common Stock	1,827	$54.0595	$99K

Holdings After Transaction: Non-Qualified Stock Option (right to buy) — 3,225 shares (Direct, null); Common Stock — 107,585 shares (Direct, null)

Footnotes (1)

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

Key Figures

Shares sold: 4,194 shares Sale price: $54.0595/share Options exercised: 5,606 shares +4 more

7 metrics

Shares sold 4,194 shares Common stock sold on May 15, 2026

Sale price $54.0595/share Average price for common stock sales

Options exercised 5,606 shares Common shares from option exercises on May 15, 2026

Strike price 1 $29.05/share Exercise price for 2,380-share option

Strike price 2 $25.405/share Exercise price for 3,226-share option

Post-transaction holdings 105,218 shares Common stock directly owned after transactions

Net share change -4,194 shares Net buy/sell direction reported as net-sell

Key Terms

open-market sale, Non-Qualified Stock Option (right to buy), derivative security, stock option becomes exercisable in four equal annual installments

4 terms

open-market sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Non-Qualified Stock Option (right to buy) financial

"security_title: Non-Qualified Stock Option (right to buy)"

derivative security financial

"transaction_code_description: Exercise or conversion of derivative security"

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

stock option becomes exercisable in four equal annual installments financial

"footnote: The stock option becomes exercisable in four equal annual installments."

Form 4 Insider Transactions: What Each Field Means →

05/15/2026 - 08:56 PM

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).

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

CALIFORNIA

94025

(City)

(State)

(Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/15/2026

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

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

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

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	05/15/2026		M		3,226	A	$25.405	107,585	D
Common Stock	05/15/2026		S⁽¹⁾		2,367	D	$54.0595	105,218	D
Common Stock	05/15/2026		M		2,380	A	$29.05	107,598	D
Common Stock	05/15/2026		S⁽¹⁾		1,827	D	$54.0595	105,771	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Non-Qualified Stock Option (right to buy)	$25.405	05/15/2026		M			3,226	⁽²⁾	07/29/2026	Common Stock	3,226	⁽³⁾	3,225	D
Non-Qualified Stock Option (right to buy)	$29.05	05/15/2026		M			2,380	⁽²⁾	02/16/2027	Common Stock	2,380	⁽³⁾	7,138	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	05/15/2026
	** 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.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What did Exponent (EXPO) CEO Catherine Corrigan do in this Form 4 filing?

Catherine Corrigan exercised stock options for 5,606 Exponent shares and sold 4,194 shares on May 15, 2026. The sales were disclosed as open-market transactions and were noted as covering the option exercise cost and related taxes.

How many Exponent (EXPO) shares did the CEO sell and at what price?

Catherine Corrigan sold 4,194 shares of Exponent common stock at an average price of $54.0595 per share. These open-market sales were reported as helping to fund the option exercise price and associated tax obligations from the same day’s transactions.

How many stock options did the Exponent (EXPO) CEO exercise and at what strike prices?

Corrigan exercised options covering 5,606 Exponent shares at strike prices of $29.05 and $25.405 per share. These exercises converted non-qualified stock options into common stock as part of her compensation, according to the Form 4 transaction details.