Transactions
66
Insider / EXPONENT INC
Corrigan Catherine
President & CEO at EXPONENT INC
- Company
- EXPONENT INC
- Ticker
- EXPO
- First filing on record
- October 16, 2025
- Latest trade on record
- August 17, 2026
- SEC filings
- EDGAR ↗
Corrigan Catherine, President & CEO at EXPONENT INC, has disclosed 66 transactions in EXPO since October 16, 2025: 0 purchases (0 open-market buys) and 19 sales, worth about $5.2M at the reported prices. The latest was filed August 18, 2026, 1 day after the trade; 9 filings were late against the 2-business-day Form 4 deadline.
Open-market buys
0
Sales
19
Avg. disclosure lag
4.2d
Trading in charts
Trade timeline
When does this person trade, how big, and in which direction? Every trade in the last 12 months.
Bought (above the line)Sold (below the line)Other transaction
In the last 12 months Corrigan Catherine made no purchases and 17 sales worth $2.6M, plus 43 other transactions. Dot size is the dollar amount.
Portfolio mix
Which stocks does this person trade most? Tile size is dollars traded, all time on record.
Corrigan Catherine has traded 1 stock on record; the largest by dollars is EXPO.
Reporting lag
Does this person report on time? One bar per filing against the Form 4 deadline.
On timeLate
2 of 16 filings on record were reported after the Form 4 deadline (two business days, counted here as 4 calendar days).
What kind of transactions
Most Form 4 rows are pay arriving or tax being withheld, not a decision to buy or sell. Only code P is an open-market purchase and code S an open-market sale. What each code means: Form 4 transaction codes.
| Code | Meaning | Rows | Shares | Value |
|---|---|---|---|---|
| M | Option exercise or conversion | 44 | 181,454 | $2.2M |
| S | Open-market sale | 18 | 38,216 | $2.5M |
| A | Grant or award | 3 | 46,314 | — |
| F | Shares withheld for tax | 1 | 6,156 | $431K |
| Year | Rows | Bought | Sold |
|---|---|---|---|
| 2026 | 49 | 0 | 14 · $2.0M |
| 2025 | 17 | 0 | 5 · $902K |
Transactions
| Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| EXPO | Option / conversion M | August 17, 2026 | August 18, 2026 | 1d | 2,379 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| EXPO | Sell S | August 17, 2026 | August 18, 2026 | 1d | 1,707 | $66 | $113K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | August 17, 2026 | August 18, 2026 | 1d | 2,379 | $29 | $69K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | July 28, 2026 | July 30, 2026 | 2d | 12,665 | — | — | derivative | Form 4 ↗ | |
| EXPO | Option / conversion M | July 28, 2026 | July 30, 2026 | 2d | 12,665 | $37 | $474K | Form 4 ↗ | ||
| EXPO | Option / conversion M | July 15, 2026 | July 17, 2026 | 2d | 2,379 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| EXPO | Sell S | July 15, 2026 | July 17, 2026 | 2d | 1,737 | $63 | $109K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | July 15, 2026 | July 17, 2026 | 2d | 2,379 | $29 | $69K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | June 25, 2026 | June 29, 2026 | 4d | 7,872 | — | — | derivative | Form 4 ↗ | |
| EXPO | Option / conversion M | June 25, 2026 | June 29, 2026 | 4d | 7,872 | $25 | $200K | Form 4 ↗ | ||
| EXPO | Option / conversion M | June 15, 2026 | June 17, 2026 | 2d | 2,380 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| EXPO | Option / conversion M | June 15, 2026 | June 17, 2026 | 2d | 3,225 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| EXPO | Sell S | June 15, 2026 | June 17, 2026 | 2d | 1,793 | $57 | $102K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | June 15, 2026 | June 17, 2026 | 2d | 2,380 | $29 | $69K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Sell S | June 15, 2026 | June 17, 2026 | 2d | 2,326 | $57 | $133K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | June 15, 2026 | June 17, 2026 | 2d | 3,225 | $25 | $82K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | May 15, 2026 | May 15, 2026 | 0d | 2,380 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| EXPO | Option / conversion M | May 15, 2026 | May 15, 2026 | 0d | 3,226 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| EXPO | Sell S | May 15, 2026 | May 15, 2026 | 0d | 1,827 | $54 | $99K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | May 15, 2026 | May 15, 2026 | 0d | 2,380 | $29 | $69K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Sell S | May 15, 2026 | May 15, 2026 | 0d | 2,367 | $54 | $128K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | May 15, 2026 | May 15, 2026 | 0d | 3,226 | $25 | $82K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | April 15, 2026 | April 16, 2026 | 1d | 2,380 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| EXPO | Option / conversion M | March 16, 2026 | April 16, 2026 | 31d | 2,380 | — | — | late10b5-1 planderivative | Form 4 ↗ | |
| EXPO | Option / conversion M | April 15, 2026 | April 16, 2026 | 1d | 3,225 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| EXPO | Option / conversion M | March 16, 2026 | April 16, 2026 | 31d | 3,226 | — | — | late10b5-1 planderivative | Form 4 ↗ | |
| EXPO | Sell S | April 15, 2026 | April 16, 2026 | 1d | 1,697 | $68 | $115K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | April 15, 2026 | April 16, 2026 | 1d | 2,380 | $29 | $69K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Sell S | April 15, 2026 | April 16, 2026 | 1d | 2,212 | $68 | $150K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | April 15, 2026 | April 16, 2026 | 1d | 3,225 | $25 | $82K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Sell S | March 16, 2026 | April 16, 2026 | 31d | 1,698 | $67 | $115K | late10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | March 16, 2026 | April 16, 2026 | 31d | 2,380 | $29 | $69K | late10b5-1 plan | Form 4 ↗ | |
| EXPO | Sell S | March 16, 2026 | April 16, 2026 | 31d | 2,214 | $67 | $149K | late10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | March 16, 2026 | April 16, 2026 | 31d | 3,226 | $25 | $82K | late10b5-1 plan | Form 4 ↗ | |
| EXPO | Other A | March 13, 2026 | March 16, 2026 | 3d | 17,814 | — | — | derivative | Form 4 ↗ | |
| EXPO | Option / conversion M | March 11, 2026 | March 13, 2026 | 2d | 12,716 | — | — | derivative | Form 4 ↗ | |
| EXPO | Sell F | March 11, 2026 | March 13, 2026 | 2d | 6,156 | $70 | $431K | Form 4 ↗ | ||
| EXPO | Option / conversion M | March 11, 2026 | March 13, 2026 | 2d | 12,716 | — | — | Form 4 ↗ | ||
| EXPO | Other A | February 20, 2026 | February 23, 2026 | 3d | 27,075 | — | — | derivative | Form 4 ↗ | |
| EXPO | Other A | February 20, 2026 | February 23, 2026 | 3d | 1,425 | — | — | derivative | Form 4 ↗ | |
| EXPO | Option / conversion M | February 17, 2026 | February 18, 2026 | 1d | 2,380 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| EXPO | Option / conversion M | February 17, 2026 | February 18, 2026 | 1d | 3,226 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| EXPO | Sell S | February 17, 2026 | February 18, 2026 | 1d | 1,702 | $67 | $114K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | February 17, 2026 | February 18, 2026 | 1d | 2,380 | $29 | $69K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Sell S | February 17, 2026 | February 18, 2026 | 1d | 2,218 | $67 | $149K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | February 17, 2026 | February 18, 2026 | 1d | 3,226 | $25 | $82K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | January 15, 2026 | January 20, 2026 | 5d | 2,380 | — | — | late10b5-1 planderivative | Form 4 ↗ | |
| EXPO | Sell S | January 15, 2026 | January 20, 2026 | 5d | 1,663 | $73 | $121K | late10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | January 15, 2026 | January 20, 2026 | 5d | 2,380 | $29 | $69K | late10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | December 16, 2025 | December 17, 2025 | 1d | 7,872 | — | — | derivative | Form 4 ↗ | |
| EXPO | Option / conversion M | December 16, 2025 | December 17, 2025 | 1d | 7,872 | $25 | $200K | Form 4 ↗ | ||
| EXPO | Option / conversion M | December 15, 2025 | December 16, 2025 | 1d | 3,225 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| EXPO | Sell S | December 15, 2025 | December 16, 2025 | 1d | 3,225 | $71 | $228K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | December 15, 2025 | December 16, 2025 | 1d | 3,225 | $25 | $82K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | November 17, 2025 | November 18, 2025 | 1d | 2,380 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| EXPO | Option / conversion M | November 17, 2025 | November 18, 2025 | 1d | 3,225 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| EXPO | Sell S | November 17, 2025 | November 18, 2025 | 1d | 1,675 | $71 | $118K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | November 17, 2025 | November 18, 2025 | 1d | 2,380 | $29 | $69K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Sell S | November 17, 2025 | November 18, 2025 | 1d | 3,225 | $70 | $226K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | November 17, 2025 | November 18, 2025 | 1d | 3,225 | $25 | $82K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | October 15, 2025 | October 16, 2025 | 1d | 2,380 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| EXPO | Option / conversion M | October 15, 2025 | October 16, 2025 | 1d | 3,226 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| EXPO | Sell S | October 15, 2025 | October 16, 2025 | 1d | 1,704 | $67 | $114K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | October 15, 2025 | October 16, 2025 | 1d | 2,380 | $29 | $69K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Sell S | October 15, 2025 | October 16, 2025 | 1d | 3,226 | $67 | $216K | 10b5-1 plan | Form 4 ↗ | |
| EXPO | Option / conversion M | October 15, 2025 | October 16, 2025 | 1d | 3,226 | $25 | $82K | 10b5-1 plan | Form 4 ↗ |
Filings
| Filed | Form | Accession | Rows | Status | Source |
|---|---|---|---|---|---|
| August 18, 2026 | Form 4 | 0000851520-26-000096 | 3 | published | EDGAR ↗ |
| July 30, 2026 | Form 4 | 0000851520-26-000094 | 2 | published | EDGAR ↗ |
| July 17, 2026 | Form 4 | 0000851520-26-000092 | 3 | published | EDGAR ↗ |
| June 29, 2026 | Form 4 | 0000851520-26-000090 | 2 | published | EDGAR ↗ |
| June 17, 2026 | Form 4 | 0000851520-26-000088 | 6 | published | EDGAR ↗ |
| May 15, 2026 | Form 4 | 0000851520-26-000072 | 6 | published | EDGAR ↗ |
| April 16, 2026 | Form 4 | 0000851520-26-000057 | 12 | published | EDGAR ↗ |
| March 16, 2026 | Form 4 | 0000851520-26-000044 | 1 | published | EDGAR ↗ |
| March 13, 2026 | Form 4 | 0000851520-26-000027 | 3 | published | EDGAR ↗ |
| February 23, 2026 | Form 4 | 0000851520-26-000016 | 2 | published | EDGAR ↗ |
| February 18, 2026 | Form 4 | 0000851520-26-000012 | 6 | published | EDGAR ↗ |
| January 20, 2026 | Form 4 | 0000851520-26-000002 | 3 | published | EDGAR ↗ |
| December 17, 2025 | Form 4 | 0000851520-25-000082 | 2 | published | EDGAR ↗ |
| December 16, 2025 | Form 4 | 0000851520-25-000080 | 3 | published | EDGAR ↗ |
| November 18, 2025 | Form 4 | 0000851520-25-000078 | 6 | published | EDGAR ↗ |
| October 16, 2025 | Form 4 | 0000851520-25-000075 | 6 | published | EDGAR ↗ |
Other insiders at EXPONENT INC
- Pye John VP Global Offices & Innovation 8 rows
- SCHLENKER RICHARD L JR EVP & Chief Financial Officer 8 rows
- James Bradley A Group Vice President 5 rows
- Rakow Joseph Group Vice President 5 rows
- Reiss Richard Group Vice President 5 rows
- Reitman Maureen T. F. Group Vice President 5 rows
- Sala Joseph Group Vice President 5 rows
- Brown George H. Director 3 rows
- Lindstrom Carol Director 3 rows
- RICHARDSON KAREN A Director 3 rows
Everyone on file, with contracts and lobbying under the company's name: EXPONENT INC.
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- Rule 10b5-1 trading plans The plan must be set up when the insider has no important non-public information.
- Options and derivatives on Form 4 Table I = shares. Table II = options and other derivatives.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| SEC EDGAR, Form 4 | 16 | 66 | October 16, 2025 | August 18, 2026 | Form 4 list on EDGAR |
Site built October 27, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Every row comes from the reporting owner's Form 4 as filed with the SEC (EDGAR ownership XML), read daily. "Value" is shares × the reported price; code P is an open-market purchase, S a sale, M an option exercise, A a grant. The lag is the filing date minus the trade date; Form 4 is due within two business days. Amendments (4/A) are not merged. Details on the methodology page; report an error on corrections.
Not investment advice. Figures are public disclosures shown as filed; they may lag the trade and may be amended later. No recommendation is made or implied.