Comparable stake leader
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC
SEC ownership of EXPONENT INC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000851520.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
03 Jun 2026
- Public ticker
- EXPO on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
03 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000851520
- Issuer location
- Menlo Park, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of EXPONENT INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
KAYNE ANDERSON RUDNICK IN...
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
03 Jun 2026
13D/G
13F
3/4/5
Lead comparable stake: 7.9%
13D/G row: KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC
Showing 1-8 of 50 holder rows.
Quick read
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC leads the comparable SEC ownership view at 7.9%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC's linked filing trail.
Comparable ownership
Top 5
KAYNE ANDERSON RUDNICK INVESTMENT...
7.9%
VANGUARD PORTFOLIO MANAGEMENT LLC
6.1%
VANGUARD CAPITAL MANAGEMENT LLC
5.2%
Conestoga Capital Advisors, LLC
5.1%
Paul R. Johnston
0.13%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC |
13D/G
13F
Company
|
7.9%
|
$258,882,829
3,886,546 shares
|
$0 | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
6.1%
|
$195,110,224
2,990,195 shares
|
$0 | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
5.2%
|
$168,755,488
2,586,291 shares
|
$0 | 31 Mar 2026 |
| Conestoga Capital Advisors, LLC |
13D/G
13F
Conestoga Capital Advisors · Company
|
5.1%
|
$175,473,413
2,526,244 shares
|
-$31,414,140 | 31 Dec 2025 |
| Paul R. Johnston |
3/4/5
Director
|
0.13%
|
$4,249,266
62,940 shares
mixed-class rows
|
— | 03 Jun 2026 |
| Eric R. Anderson |
3/4/5
Chief Financial Officer
|
0.01%
|
$192,813
2,955 shares
|
— | 01 May 2026 |
| BlackRock, Inc. |
13F
Company
|
12%
|
$395,989,982
6,068,812 shares
|
— | 31 Mar 2026 |
| STATE STREET CORP |
13F
Company
|
3.8%
|
$123,292,224
1,889,536 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$3,846,464.
Buys
$29,049
Insiders: 2
Sells
$3,875,513
Insiders: 6
Net
-$3,846,464
Shares: -58,436
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 415
Shares: 58,851
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 20,905 | $0 | $1,217,680 | -$1,217,680 |
| 3-6 | 89 | 13,495 | $5,931 | $951,745 | -$945,814 |
| 6-9 | 80 | 13,055 | $5,100 | $902,471 | -$897,372 |
| 9-12 | 246 | 11,396 | $18,018 | $803,617 | -$785,599 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 21 reporting-owner rows connected to EXPONENT INC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
21
Largest Forms 3/4/5 holder
Richard L. Schlenker Jr.
Net 12M change
-$3,846,463
Latest report
15 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Richard L. Schlenker Jr. | EVP & Chief Financial Officer | $18,217,981 | +$12,159 | +0.07% | Mixed | 13 Mar 2026 |
| Catherine Corrigan | President & CEO, Director | $7,241,943 | -$2,967,918 | -29% | Mixed | 15 Jun 2026 |
| John B. Shoven | Director | $5,695,896 | Mixed | 07 Jun 2023 | ||
| Paul R. Johnston | Director | $4,249,266 | Mixed | 03 Jun 2026 | ||
| Maureen T. F. Reitman | Group Vice President | $3,624,129 | Mixed | 13 Mar 2026 | ||
| John Pye | VP Global Offices & Innovation | $2,735,851 | -$287,007 | -9.5% | Mixed | 06 Apr 2026 |
| Karen A. Richardson | Director | $2,376,656 | Mixed | 03 Jun 2026 | ||
| Sally Shepard | Chief Human Resources Officer | $2,258,674 | Mixed | 15 Mar 2024 | ||
| Debra Zumwalt | Director | $2,219,338 | Mixed | 03 Jun 2026 | ||
| Steven J. Murray | Group Vice President | $2,144,989 | Mixed | 21 Aug 2023 | ||
| Harri Kytomaa | Group Vice President | $1,146,832 | Mixed | 15 Mar 2023 | ||
| George H. Brown | Director | $842,563 | Mixed | 03 Jun 2026 | ||
| Carol Lindstrom | Director | $756,107 | Mixed | 03 Jun 2026 | ||
| Joseph Rakow | Group Vice President | $716,600 | -$160,974 | -18% | Mixed | 13 May 2026 |
| Eric Guyer | Group Vice Presient | $636,938 | Mixed | 20 May 2024 | ||
| Joseph Sala | Group Vice President | $577,298 | -$229,731 | -28% | Mixed | 13 May 2026 |
| Richard Reiss | Group Vice President | $301,485 | -$98,062 | -25% | Mixed | 19 May 2026 |
| Bradley A. James | Group Vice President | $242,648 | -$114,930 | -32% | Mixed | 26 May 2026 |
| Brian Kundert | Chief Human Resources Officer | $226,901 | Mixed | 13 Mar 2026 | ||
| Eric R. Anderson | Chief Financial Officer | $192,813 | Median | 01 May 2026 |
Recent insider transactions for EXPONENT INC
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Catherine Corrigan | EXPO | Common Stock | Sale | -3.72% | $235,303 | $57.13 | -4,119 | 106,670 | 15 Jun 2026 | Direct |
| Catherine Corrigan | EXPO | Common Stock | Options Exercise | 5.42% | 5,605 | 109,050 | 15 Jun 2026 | Direct | ||
| Catherine Corrigan | EXPO | Non-Qualified Stock Option (right to buy) | Options Exercise | -100% | -5,605 | 0 | 15 Jun 2026 | Direct | ||
| Carol Lindstrom | EXPO | Restricted Stock Units | Award | 2,859 | 2,859 | 04 Jun 2026 | Direct | |||
| George H. Brown | EXPO | Restricted Stock Units | Award | 2,859 | 2,859 | 04 Jun 2026 | Direct | |||
| Karen A. Richardson | EXPO | Restricted Stock Units | Award | 2,859 | 2,859 | 04 Jun 2026 | Direct | |||
| Debra Zumwalt | EXPO | Restricted Stock Units | Award | 2,859 | 2,859 | 04 Jun 2026 | Direct | |||
| Carol Lindstrom | EXPO | Common Stock | Options Exercise | 27.2% | 2,009 | 9,405 | 03 Jun 2026 | Direct | ||
| Carol Lindstrom | EXPO | Restricted Stock Units | Options Exercise | -100% | -2,009 | 0 | 03 Jun 2026 | Direct | ||
| George H. Brown | EXPO | Common Stock | Options Exercise | 23% | 2,009 | 10,730 | 03 Jun 2026 | Direct | ||
| George H. Brown | EXPO | Restricted Stock Units | Options Exercise | -100% | -2,009 | 0 | 03 Jun 2026 | Direct | ||
| Karen A. Richardson | EXPO | Common Stock | Options Exercise | 2,009 | 2,009 | 03 Jun 2026 | Direct | |||
| Karen A. Richardson | EXPO | Restricted Stock Units | Options Exercise | -100% | -2,009 | 0 | 03 Jun 2026 | Direct | ||
| Debra Zumwalt | EXPO | Common Stock | Options Exercise | 6.74% | 2,009 | 31,830 | 03 Jun 2026 | Direct | ||
| Debra Zumwalt | EXPO | Restricted Stock Units | Options Exercise | -100% | -2,009 | 0 | 03 Jun 2026 | Direct | ||
| Paul R. Johnston | EXPO | Common Stock | Options Exercise | 3.3% | 2,009 | 62,940 | 03 Jun 2026 | Direct | ||
| Paul R. Johnston | EXPO | Restricted Stock Units | Options Exercise | -100% | -2,009 | 0 | 03 Jun 2026 | Direct | ||
| Bradley A. James | EXPO | Common Stock | Sale | -64.4% | $114,930 | $57.46 | -2,000 | 1,105 | 26 May 2026 | Direct |
| Richard Reiss | EXPO | Common Stock | Sale | -42.2% | $98,062 | $58.65 | -1,672 | 2,288 | 19 May 2026 | Direct |
| Catherine Corrigan | EXPO | Common Stock | Sale | -3.83% | $226,726 | $54.06 | -4,194 | 105,218 | 15 May 2026 | Direct |
| Catherine Corrigan | EXPO | Common Stock | Options Exercise | 5.5% | 5,606 | 107,598 | 15 May 2026 | Direct | ||
| Catherine Corrigan | EXPO | Non-Qualified Stock Option (right to buy) | Options Exercise | -63.5% | -5,606 | 3,225 | 15 May 2026 | Direct | ||
| Joseph Rakow | EXPO | Common Stock | Sale | -100% | $160,974 | $54.66 | -2,945 | 0 | 13 May 2026 | Direct |
| Joseph Sala | EXPO | Common Stock | Sale | -100% | $117,060 | $56.66 | -2,066 | 0 | 13 May 2026 | Direct |
| Catherine Corrigan | EXPO | Common Stock | Sale | -3.63% | $264,625 | $67.70 | -3,909 | 103,676 | 15 Apr 2026 | Direct |
| Catherine Corrigan | EXPO | Common Stock | Options Exercise | 5.58% | 5,605 | 106,056 | 15 Apr 2026 | Direct | ||
| Catherine Corrigan | EXPO | Non-Qualified Stock Option (right to buy) | Options Exercise | -46.5% | -5,605 | 6,451 | 15 Apr 2026 | Direct | ||
| John Pye | EXPO | Non-Qualified Stock Option (right to buy) | Award | 14,992 | 14,992 | 06 Apr 2026 | Direct | |||
| John Pye | EXPO | Incentive Stock Option (right to buy) | Award | 6,008 | 6,008 | 06 Apr 2026 | Direct | |||
| Catherine Corrigan | EXPO | Common Stock | Sale | -3.69% | $264,014 | $67.49 | -3,912 | 101,981 | 16 Mar 2026 | Direct |
| Catherine Corrigan | EXPO | Common Stock | Options Exercise | 5.68% | 5,606 | 104,361 | 16 Mar 2026 | Direct | ||
| Catherine Corrigan | EXPO | Non-Qualified Stock Option (right to buy) | Options Exercise | -36.7% | -5,606 | 9,676 | 16 Mar 2026 | Direct | ||
| Richard L. Schlenker Jr. | EXPO | Restricted Stock Units | Award | 10,688 | 10,688 | 13 Mar 2026 | Direct | |||
| Joseph Sala | EXPO | Restricted Stock Units | Award | 9,798 | 9,798 | 13 Mar 2026 | Direct | |||
| Maureen T. F. Reitman | EXPO | Restricted Stock Units | Award | 9,500 | 9,500 | 13 Mar 2026 | Direct | |||
| Richard Reiss | EXPO | Restricted Stock Units | Award | 2,970 | 2,970 | 13 Mar 2026 | Direct | |||
| Joseph Rakow | EXPO | Restricted Stock Units | Award | 10,688 | 10,688 | 13 Mar 2026 | Direct | |||
| John Pye | EXPO | Restricted Stock Units | Award | 5,938 | 5,938 | 13 Mar 2026 | Direct | |||
| Brian Kundert | EXPO | Restricted Stock Units | Award | 3,564 | 3,564 | 13 Mar 2026 | Direct | |||
| Bradley A. James | EXPO | Restricted Stock Units | Award | 4,454 | 4,454 | 13 Mar 2026 | Direct | |||
| Catherine Corrigan | EXPO | Restricted Stock Units | Award | 17,814 | 17,814 | 13 Mar 2026 | Direct | |||
| Richard Reiss | EXPO | Common Stock | Tax liability | -19.5% | -958 | 3,960 | 11 Mar 2026 | Direct | ||
| Richard Reiss | EXPO | Common Stock | Options Exercise | 75.8% | 2,120 | 4,918 | 11 Mar 2026 | Direct | ||
| Richard Reiss | EXPO | Restricted Stock Units | Options Exercise | -100% | -2,120 | 0 | 11 Mar 2026 | Direct | ||
| Richard L. Schlenker Jr. | EXPO | Common Stock | Tax liability | -1.58% | -3,694 | 230,351 | 11 Mar 2026 | Direct | ||
| Richard L. Schlenker Jr. | EXPO | Common Stock | Options Exercise | 3.37% | 7,630 | 234,045 | 11 Mar 2026 | Direct | ||
| Richard L. Schlenker Jr. | EXPO | Restricted Stock Units | Options Exercise | -100% | -7,630 | 0 | 11 Mar 2026 | Direct | ||
| Joseph Sala | EXPO | Common Stock | Tax liability | -35% | -1,114 | 2,066 | 11 Mar 2026 | Direct | ||
| Joseph Sala | EXPO | Common Stock | Options Exercise | 3,180 | 3,180 | 11 Mar 2026 | Direct | |||
| Joseph Sala | EXPO | Restricted Stock Units | Options Exercise | -100% | -3,180 | 0 | 11 Mar 2026 | Direct |
* marks a reported price that did not pass the local price check.