Michael George Rosenbaum, Chief Executive Officer and Director of Guidewire Software, Inc. (NYSE: GWRE), filed a Form 4 on August 10, 2026, disclosing the sale of 1,200 shares of common stock on that same date.

Key Highlights

  • Shares sold: 1,200 shares of Guidewire Software common stock were disposed of on 08/10/2026.
  • Sale price: The shares were sold at $169.5 per share.
  • Remaining ownership: Following the transaction, Rosenbaum directly beneficially owns 190,176 shares.
  • Plan-driven sale: The filing identifies the transaction as an automatic sale pursuant to a 10b5-1 Trading Plan adopted by Rosenbaum on October 14, 2025.
  • Transaction code: The sale is recorded under transaction code S (sale in the open market).

Rosenbaum's Share Sale Details and 10b5-1 Plan Context

According to the filing, Michael George Rosenbaum, who serves as both Chief Executive Officer and Director of Guidewire Software, Inc., disposed of 1,200 shares of the company's common stock on August 10, 2026, at a price of $169.5 per share. The form was signed by Winston King as Attorney-in-Fact for Rosenbaum and also dated August 10, 2026.

The filing indicates the sale was carried out directly and is classified under transaction code S, indicating an open-market sale. A box on the form is checked to indicate "that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c)." The filing's footnote specifies this was an "automatic sale pursuant to a 10b5-1 Trading Plan adopted by the Reporting Person on October 14, 2025."

Following the reported transaction, Rosenbaum's direct beneficial ownership stands at 190,176 shares of Guidewire Software common stock, according to the filing. No derivative securities transactions were reported in Table II of the form.

What Was Disclosed

The Form 4 discloses a single open-market sale of 1,200 Guidewire Software common shares by CEO Michael George Rosenbaum on August 10, 2026, at $169.5 per share, executed automatically under a Rule 10b5-1 trading plan adopted October 14, 2025.