Exponent (NASDAQ: EXPO) VP converts 3,180 RSUs; 1,114 shares withheld for taxes

Rhea-AI Filing Summary

EXPONENT INC Group Vice President Joseph Sala reported compensation-related equity activity. On March 11, 2026, he exercised 3,180 Restricted Stock Units granted on March 11, 2022, converting them into 3,180 shares of Common Stock on a 1:1 basis.

To cover tax withholding obligations, 1,114 of these shares were withheld by the company at a value of $70.03 per share, leaving Sala with 2,066 shares of Common Stock held directly after the transactions. The filing shows no remaining derivative (RSU) position from this grant.

Insights

Insider transactions analyst

Routine RSU vesting with tax withholding; no open-market trading.

Group Vice President Joseph Sala converted 3,180 vested Restricted Stock Units into an equal number of EXPONENT INC common shares on March 11, 2026. This is a standard derivative exercise tied to a prior equity award granted on March 11, 2022.

Of the shares received, 1,114 were withheld by the company at $70.03 per share to satisfy tax obligations, a common non-market mechanism. Sala’s position after these entries is 2,066 common shares held directly, and the related RSU grant has been fully converted.

The transactions do not involve open-market buying or selling and appear to be routine compensation and tax events rather than discretionary trades, so they carry limited informational value about Sala’s view of the stock.

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).

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^*

Sala Joseph

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Group Vice President

3. Date of Earliest Transaction (Month/Day/Year)
03/11/2026

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	03/11/2026		M(1)		3,180	A	(2)	3,180	D
Common Stock	03/11/2026		F(3)		1,114	D	$70.03	2,066	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
Restricted Stock Units	(1)	03/11/2026		M(1)			3,180	03/11/2026	03/11/2026	Common Stock	3,180	(2)	0	D

Explanation of Responses:

1. Reflects the conversion of shares of vested Restricted Stock Units granted on March 11, 2022 into shares of Common Stock on a 1:1 basis.

2. Not applicable.

3. Reflects shares of common stock withheld by the Company to satify the tax withholding obligations of the Reporting Person.

	By: Wendy Whitehouse For: Joseph Sala	03/13/2026
	** 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.

FAQ

What did Exponent (EXPO) executive Joseph Sala report in this Form 4?

Joseph Sala reported the vesting and conversion of 3,180 Restricted Stock Units into 3,180 shares of Exponent common stock, plus a related tax withholding transaction. These entries reflect routine equity compensation mechanics rather than open-market purchases or sales of EXPO shares.

How many Exponent (EXPO) RSUs did Joseph Sala convert into common stock?

Joseph Sala converted 3,180 vested Restricted Stock Units into 3,180 shares of Exponent common stock on a 1:1 basis. The RSUs were originally granted on March 11, 2022, and fully settled into shares on March 11, 2026, according to the filing footnotes.

Were any of Joseph Sala’s Exponent (EXPO) shares sold on the open market?

No open-market sale was reported. Instead, 1,114 shares of Exponent common stock were withheld by the company at $70.03 per share solely to satisfy Sala’s tax withholding obligations, a standard non-market disposition mechanism for equity awards.

How many Exponent (EXPO) shares does Joseph Sala hold after these transactions?

After the reported transactions, Joseph Sala directly holds 2,066 shares of Exponent common stock. This reflects 3,180 shares received from RSU conversion, offset by 1,114 shares withheld by the company to cover his associated tax obligations on the vesting event.

What price is associated with the tax withholding on Exponent (EXPO) shares?

The filing shows 1,114 Exponent common shares withheld for taxes at $70.03 per share. This figure represents the fair market value used to cover Joseph Sala’s tax liability arising from the RSU vesting and conversion into common stock on March 11, 2026.

Does Joseph Sala have remaining Exponent (EXPO) RSUs after this Form 4 event?

The reported 3,180 Restricted Stock Units were fully converted into common shares on a 1:1 basis, and the derivative summary in this filing shows no remaining position from this grant. The transactions complete settlement of that specific RSU award into Exponent stock.