CORRIGAN CATHERINE (President & CEO) sold 7.0% of their position (7.82K shares) of EXPONENT INC on the open market

Open‑market sale worth $528.6K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 4 sales

CORRIGAN CATHERINE

Filed: 4/16/2026ACC: 0000851520-26-000057

InsiderCORRIGAN CATHERINECIK 1552213

→

IssuerEXPONENT INCCIK 851520

DirectorOfficer· President & CEO

Since Feb 2026

-7.82K

Net shares

Net seller

$528.6K

Total sold

Open market trades

0B · 4S

Total transactions

11.21K acquired · 19.03K disposed

Non-Derivative Transactions8

Common Stock

Direct

M · Option Exercise

+3.23K

Price / share

$25.41

Trade value

$81.96K

% of position

3.2%

3/16/2026

100.97K→104.19K

Common Stock

Direct

S · Sale

−2.21K

Price / share

$67.49

Trade value

$149.42K

% of position

2.1%

3/16/2026

104.19K→101.98K

Common Stock

Direct

M · Option Exercise

+2.38K

Price / share

$29.05

Trade value

$69.14K

% of position

2.3%

3/16/2026

101.98K→104.36K

Common Stock

Direct

S · Sale

−1.70K

Price / share

$67.49

Trade value

$114.59K

% of position

1.6%

3/16/2026

104.36K→102.66K

Common Stock

Direct

M · Option Exercise

+3.23K

Price / share

$25.41

Trade value

$81.93K

% of position

3.1%

4/15/2026

102.66K→105.89K

Common Stock

Direct

S · Sale

−2.21K

Price / share

$67.70

Trade value

$149.74K

% of position

2.1%

4/15/2026

105.89K→103.68K

Common Stock

Direct

M · Option Exercise

+2.38K

Price / share

$29.05

Trade value

$69.14K

% of position

2.3%

4/15/2026

103.68K→106.06K

Common Stock

Direct

S · Sale

−1.70K

Price / share

$67.70

Trade value

$114.88K

% of position

1.6%

4/15/2026

106.06K→104.36K

Total

Net shares

+3.39K

Net value

-$226.47K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	3/16/2026	M · Option Exercise	+3.23K	$25.41	$81.96K	3.2%	100.97K	104.19K
Common Stock Direct	3/16/2026	S · Sale	−2.21K	$67.49	$149.42K	2.1%	104.19K	101.98K
Common Stock Direct	3/16/2026	M · Option Exercise	+2.38K	$29.05	$69.14K	2.3%	101.98K	104.36K
Common Stock Direct	3/16/2026	S · Sale	−1.70K	$67.49	$114.59K	1.6%	104.36K	102.66K
Common Stock Direct	4/15/2026	M · Option Exercise	+3.23K	$25.41	$81.93K	3.1%	102.66K	105.89K
Common Stock Direct	4/15/2026	S · Sale	−2.21K	$67.70	$149.74K	2.1%	105.89K	103.68K
Common Stock Direct	4/15/2026	M · Option Exercise	+2.38K	$29.05	$69.14K	2.3%	103.68K	106.06K
Common Stock Direct	4/15/2026	S · Sale	−1.70K	$67.70	$114.88K	1.6%	106.06K	104.36K
Total			+3.39K		-$226.47K

Derivative Transactions4

Non-Qualified Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

3.23K shares

−3.23K

Strike price

25.405

Held after

9.68K

Exercisable

—

3/16/2026

Non-Qualified Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

2.38K shares

−2.38K

Strike price

29.05

Held after

11.90K

Exercisable

—

3/16/2026

Non-Qualified Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

3.23K shares

−3.23K

Strike price

25.405

Held after

6.45K

Exercisable

—

4/15/2026

Non-Qualified Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

2.38K shares

−2.38K

Strike price

29.05

Held after

9.52K

Exercisable

—

4/15/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Non-Qualified Stock Option (right to buy) Direct	Common Stock3.23K shares	3/16/2026	M · Option Exercise	−3.23K	25.405	—	9.68K
Non-Qualified Stock Option (right to buy) Direct	Common Stock2.38K shares	3/16/2026	M · Option Exercise	−2.38K	29.05	—	11.90K
Non-Qualified Stock Option (right to buy) Direct	Common Stock3.23K shares	4/15/2026	M · Option Exercise	−3.23K	25.405	—	6.45K
Non-Qualified Stock Option (right to buy) Direct	Common Stock2.38K shares	4/15/2026	M · Option Exercise	−2.38K	29.05	—	9.52K