Exponent EXPO Insider Ownership

NASDAQ EXPO

$72.55 +0.30 (+0.42%)

At close: Oct 20, 2026 · 4:00 PM EDT

Insider Holdings by Owner

727.60K Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

1.27%

▲+0.137% pp QoQ

Shares Held by Insiders

621.23K

filed for Sep 2026

▲+9.68% QoQ

Shares Outstanding

48.75Mn

48,753,000 shares

Direct Holdings

589.00K

Indirect: 32.23K

Net Shares Traded (QoQ)

+54.85K

net buying in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 11, 2026

Over the past 12 months, Exponent insiders bought $12,594 of stock on the open market (184 shares) and sold $3.29 million (50.9K shares).

Counted by insider, open-market buying of EXPO stock in the past 12 months came from one insider and selling from 6 insiders.
Among Exponent's insiders, the largest open-market purchases in the past 12 months were by Shukri Jeries Souri (Group Vice President), totaling $12,594 (184 shares), most recently on September 18, 2026.
On the sell side, Catherine Corrigan (Chief Executive Officer) led open-market sales of Exponent stock over the past 12 months with $2.5 million (38.22K shares), most recently on August 17, 2026.
Beyond open-market trades, insiders at Exponent acquired 131.3K shares through option exercises and conversions, gave up 19.97K shares to cover taxes or exercise prices and gave away 140 shares as gifts in the last 12 months.
Per Business Quant data, Exponent insiders hold 621.23K shares in total based on their latest Form 4 filings, up 9.68% from 566.38K shares at the end of Q2 2026 and up 10.15% from 563.98K shares at the end of Q3 2025.
Direct holdings account for 589K shares (94.81%) of EXPO's insider total, and indirect holdings through trusts, partnerships and family members for 32.23K shares (5.19%).
EXPO's insider total is spread across 12 insiders who have filed a Form 4 in the past two years.
Exponent's three biggest insider holders are Richard L. Schlenker Jr. (EVP & Chief Financial Officer, 230.35K shares), Catherine Corrigan (Chief Executive Officer, 129.11K shares) and Paul R. Johnston (Director, 62.94K shares), based on their latest Form 4 filings.
The holding of Richard L. Schlenker Jr. makes up 37.08% of all shares held by Exponent insiders.
Institutions held 92.30% of Exponent's outstanding shares in their Q2 2026 13F filings, insiders about 1.27% based on their latest Form 4 filings, and other investors, including the public, the remaining 6.43%.
In the past year, 15 insiders of Exponent submitted 46 Form 4 filings reporting trades, awards or other transactions.
Insider figures for EXPO include Form 4 filings through September 22, 2026.

Form 4 Holdings

Insiders Holding EXPO

Insiders 16

Shares held 727.60K

Of outstanding 1.49%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	Richard L Jr Schlenker	Evp Chief Financial Officer	230,351	230,351	31.7%	13 Mar, 2026
2	Catherine Corrigan	Chief Executive Officer	129,108	129,108	17.7%	18 Aug, 2026
3	John B Shoven	Director	72,791	72,791	10.0%	09 Jun, 2023
4	Paul R Johnston	Executive Chairman	62,940	62,940	8.7%	04 Jun, 2026
5	Shukri Jeries Souri	Group Vice President	40,873	40,873	5.6%	22 Sep, 2026
6	Maureen T. F. Reitman	Group Vice President	39,226	39,226	5.4%	13 Mar, 2026
7	Debra Zumwalt	Director	31,830	31,830	4.4%	04 Jun, 2026
8	John Pye	Vp Global Offices Innovation	29,131	29,131	4.0%	13 Mar, 2026
9	Steven J Murray	Group Vice President	27,412	27,412	3.8%	22 Aug, 2023
10	Sally Shepard	Chief Human Resources Officer	23,745	23,745	3.3%	15 Mar, 2024
11	Harri Kytomaa	Group Vice President	14,656	14,656	2.0%	17 Mar, 2023
12	George H. Brown	Director	10,730	10,730	1.5%	04 Jun, 2026
13	Carol Lindstrom	Director	9,405	9,405	1.3%	04 Jun, 2026
14	Richard Reiss	Group Vice President	2,288	2,288	0.3%	19 May, 2026
15	Karen A Richardson	Director	2,009	2,009	0.3%	04 Jun, 2026
16	Bradley A James	Group Vice President	1,105	1,105	0.2%	27 May, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

3,239 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
18 Sep, 2026	Shukri Jeries Souri	Group Vice President	Acquired P	184	$68.45	$12.59K	40,873	Direct
17 Aug, 2026	Catherine Corrigan	Chief Executive Officer	Acquired M	2,379	$29.05	$69.11K	130,815	Direct
17 Aug, 2026	Catherine Corrigan	Chief Executive Officer	Disposed S	1,707	$66.28	$113.14K	129,108	Direct
17 Aug, 2026	Catherine Corrigan	Chief Executive Officer	Disposed M	2,379	—	—	0	Direct
28 Jul, 2026	Catherine Corrigan	Chief Executive Officer	Acquired M	12,665	$37.45	$474.30K	128,436	Direct
28 Jul, 2026	Catherine Corrigan	Chief Executive Officer	Disposed M	12,665	—	—	12,665	Direct
15 Jul, 2026	Catherine Corrigan	Chief Executive Officer	Acquired M	2,379	$29.05	$69.11K	117,508	Direct
15 Jul, 2026	Catherine Corrigan	Chief Executive Officer	Disposed S	1,737	$62.78	$109.04K	115,771	Direct
15 Jul, 2026	Catherine Corrigan	Chief Executive Officer	Disposed M	2,379	—	—	2,379	Direct
25 Jun, 2026	Catherine Corrigan	Chief Executive Officer	Acquired M	7,872	$25.41	$199.99K	115,129	Direct
25 Jun, 2026	Catherine Corrigan	Chief Executive Officer	Disposed M	7,872	—	—	0	Direct
15 Jun, 2026	Catherine Corrigan	President Ceo	Acquired M	3,225	$25.41	$81.93K	108,996	Direct
15 Jun, 2026	Catherine Corrigan	President Ceo	Disposed S	2,326	$57.13	$132.88K	106,670	Direct
15 Jun, 2026	Catherine Corrigan	President Ceo	Acquired M	2,380	$29.05	$69.14K	109,050	Direct
15 Jun, 2026	Catherine Corrigan	President Ceo	Disposed S	1,793	$57.13	$102.43K	107,257	Direct
15 Jun, 2026	Catherine Corrigan	President Ceo	Disposed M	3,225	—	—	0	Direct
15 Jun, 2026	Catherine Corrigan	President Ceo	Disposed M	2,380	—	—	4,758	Direct
03 Jun, 2026	Paul R Johnston	Director	Acquired M	2,009	—	—	62,940	Direct
03 Jun, 2026	Karen A Richardson	Director	Acquired M	2,009	—	—	2,009	Direct
03 Jun, 2026	Debra Zumwalt	Director	Acquired M	2,009	—	—	31,830	Direct

Showing 1 to 20 of 3,239 transactions