Corrigan Catherine 4

What Happened Catherine Corrigan, President & CEO (and director) of Exponent, converted 12,716 vested restricted stock units (RSUs) into common shares on March 11, 2026. As part of the net settlement, 6,156 shares were withheld by the company to satisfy tax withholding obligations; the withholding is reported as a disposition at $70.03 per share, totaling $431,105. The filing shows the conversion/acquisition of 12,716 shares and the related share withholding for taxes.

Key Details

• Transaction date: March 11, 2026; Form 4 filed March 13, 2026 (timely).
• Transaction codes: M = exercise/conversion of derivative (conversion of RSUs); F = payment of tax withholding.
• Converted/Acquired: 12,716 shares (1:1 conversion of vested RSUs granted Mar 11, 2022) — footnote F1.
• Withheld/Disposed: 6,156 shares to cover tax withholding at $70.03/share = $431,105 — footnote F3.
• Shares owned after transaction: not specified in the filing.
• No 10b5-1 plan or late-filing indication noted in this filing.

Context This was a routine RSU vest-and-convert event with a cashless/net share settlement where the company withheld shares to meet tax obligations. Such withholding transactions are common for executives receiving vested equity and are not an open-market sale or a purchase signal. Transaction codes: M indicates conversion/exercise of a derivative (here, RSUs converting to common stock); F indicates shares withheld to satisfy tax liabilities.