Guidewire Software CEO Michael Rosenbaum Sells 1,200 Shares Under Pre-Arranged Trading Plan

Executive Leadership Share Disposition at Guidewire Software

Michael George Rosenbaum, who holds the dual roles of Chief Executive Officer and Director at Guidewire Software, Inc., executed a stock sale transaction on July 27, 2026. The filing indicates that Rosenbaum sold 1,200 shares of the company's common stock at a transaction price of $142.31 per share. This disposition was reported through the regulatory disclosure mechanism required for company insiders and reflects standard corporate governance practices for monitoring transactions by senior executives and board members.

The transaction represents a standard capital management or portfolio rebalancing activity by the CEO. Following completion of the sale, Rosenbaum retained direct beneficial ownership of 192,576 shares of Guidewire common stock, indicating continued substantial personal investment in the company he leads. The filing does not disclose the CEO's rationale for the sale or commentary on the company's financial performance or outlook.

10b5-1 Trading Plan Provides Legal Framework for Insider Sales

The transaction was executed pursuant to a Rule 10b5-1 trading plan that Rosenbaum adopted on October 14, 2025, more than nine months prior to the July 27, 2026 sale date. Rule 10b5-1 plans are commonly used by corporate insiders, including executives and board members, to establish predetermined trading schedules in advance. These plans create an affirmative defense under securities laws against allegations of improper trading based on material nonpublic information, provided the plan meets specific conditions regarding timing, pricing, and execution.

The regulatory disclosure confirms that the automatic sale proceeded in accordance with this pre-arranged plan, with the checkbox indicating that the 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)." This structured approach to insider trading reflects standard compliance practice among public company executives seeking to manage their equity holdings within appropriate regulatory boundaries.

Continuing Substantial Equity Stake Demonstrates Ongoing CEO Investment

Despite the sale of 1,200 shares, Rosenbaum's remaining position of 192,576 directly held shares represents a significant personal financial stake in Guidewire Software's performance. The continued substantial ownership by the company's CEO is often viewed by investors and analysts as an alignment of leadership interests with shareholder value creation. The disclosure does not indicate any change in Rosenbaum's roles or responsibilities at the company.

The filing provides no information regarding the CEO's total market position in Guidewire stock, including any indirect beneficial ownership through trusts, family entities, or other structures that may be disclosed in other regulatory documents or proxy statements. Investors seeking a complete picture of executive compensation and equity holdings typically review annual proxy statements filed with the SEC, which provide comprehensive breakdowns of insider ownership structures.

Attorney-in-Fact Executes Transaction on CEO's Behalf

The regulatory filing indicates that the transaction was executed by Winston King, who is identified as an attorney-in-fact acting on behalf of Michael George Rosenbaum. The use of an attorney-in-fact to execute securities transactions is a common administrative practice that allows designated representatives to carry out pre-planned trades on behalf of executives. King signed the disclosure form on July 27, 2026, the same date as the transaction execution.

This delegation of transaction authority is consistent with standard corporate governance and administrative procedures at public companies, where designated legal representatives facilitate the completion of predetermined trades established under Rule 10b5-1 plans or other approved trading mechanisms. The filing does not disclose additional details regarding King's role or relationship to Rosenbaum beyond this transaction.

Direct Beneficial Ownership Structure Reported in Filing

The disclosure form indicates that the 192,576 shares owned by Rosenbaum following the transaction are held in direct form, meaning they are held in his personal name rather than through intermediate entities or structures. Direct ownership is the simplest and most straightforward form of beneficial ownership for regulatory reporting purposes. The filing confirms no indirect beneficial ownership interests in other securities or derivative positions resulting from this transaction.

The transaction code "S" in the regulatory table denotes a sale of securities, and the form contains no entries in the derivative securities table, indicating that no options, warrants, or other derivative instruments were involved in this transaction. The straightforward nature of the filing—involving only common stock and direct ownership—suggests a routine capital transaction rather than a complex equity restructuring or compensation-related event.

Transaction Timing and Market Context

The July 27, 2026 transaction date represents the point at which the automatic sale contemplated by the October 14, 2025 Rule 10b5-1 plan was executed. Rule 10b5-1 plans typically specify particular dates, price targets, or other conditions for automatic execution to eliminate discretionary decision-making at the time of sale. The disclosure form confirms the execution date but does not provide the specific conditions or parameters of the underlying plan agreement.

The transaction price of $142.31 per share is reported factually in the disclosure without any assessment or commentary regarding whether this represented a favorable or unfavorable price relative to prior trading ranges or market conditions. Investors seeking broader context regarding Guidewire's stock performance around this date would need to consult historical price charts and news coverage from that period.

Regulatory Reporting Requirements for Corporate Insiders

The filing constitutes the CEO's required disclosure under Section 16(a) of the Securities Exchange Act of 1934, which mandates that officers, directors, and beneficial owners of more than ten percent of a company's equity securities report changes in their holdings. These disclosures are part of the public record maintained by the SEC and available through the EDGAR database, providing transparency regarding insider trading activity to investors and the broader market.

The form includes standardized certifications regarding the accuracy and completeness of the disclosure, with warnings that intentional misstatements or omissions of facts constitute federal crimes under 18 U.S.C. Section 1001 and related securities laws. The filing was executed by the attorney-in-fact and dated July 27, 2026, documenting compliance with these regulatory reporting obligations.

What This Transaction Reveals About Executive Compensation and Equity Management

While the disclosure itself is limited to factual reporting of the transaction, it provides evidence that Guidewire's CEO actively manages his equity position in the company. The use of a Rule 10b5-1 plan established several months prior to execution suggests deliberate planning and structured capital management rather than opportunistic trading. The continued substantial equity stake following the sale indicates that equity ownership remains a significant component of the CEO's financial exposure to company performance.

Investors interested in understanding the full context of executive compensation at Guidewire Software—including base salary, bonus arrangements, equity grants, and vesting schedules—typically review the company's annual proxy statement on Schedule 14A filed with the SEC. That document provides comprehensive disclosure regarding all forms of compensation for named executive officers and the rationale behind compensation policies and practices.