Guidewire Software Chief Executive Officer Michael George Rosenbaum filed a Form 4 on November 9, 2026, disclosing the sale of 1,200 shares of common stock under a pre-established Rule 10b5-1 trading plan.

Key Highlights

  • Transaction: Rosenbaum disposed of 1,200 shares of Guidewire Software common stock on November 9, 2026.
  • Price: Shares were sold at $159.60 each, according to the filing.
  • Remaining ownership: Following the transaction, Rosenbaum directly beneficially owned 271,266 shares.
  • 10b5-1 plan: The sale was described as an automatic sale pursuant to a 10b5-1 Trading Plan adopted by Rosenbaum on October 14, 2025.
  • Filing signatory: The form was signed by Winston King as Attorney-in-Fact for Michael George Rosenbaum.

Rosenbaum's November 2026 Share Sale Under 10b5-1 Plan

According to the Form 4 filed with the SEC, Michael George Rosenbaum, who serves as both a Director and Chief Executive Officer of Guidewire Software, Inc. (NYSE:GWRE), reported a single open-market sale of common stock on November 9, 2026. The transaction involved 1,200 shares disposed of at a price of $159.60 per share, coded as a sale ("S") under Transaction Code instructions.

The filing notes that the sale was "automatic" and carried out pursuant to a Rule 10b5-1 Trading Plan that Rosenbaum adopted on October 14, 2025. The Form 4 also indicates that the filing checkbox for a transaction made pursuant to a contract, instruction, or written plan satisfying the affirmative defense conditions of Rule 10b5-1(c) was marked. Following the reported sale, Rosenbaum's direct beneficial ownership in Guidewire Software common stock stood at 271,266 shares.

No derivative securities transactions were reported in Table II of the filing. The form was filed by one reporting person and was signed on November 9, 2026 by Winston King, identified as Attorney-in-Fact for Michael George Rosenbaum. No amendment date was listed, indicating this is an original filing rather than a revision of a prior report.

What Was Disclosed

Rosenbaum's Form 4 disclosed the sale of 1,200 shares of Guidewire Software common stock at $159.60 on November 9, 2026, executed automatically under a 10b5-1 plan adopted October 14, 2025, leaving him with 271,266 directly held shares.