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Michael George Rosenbaum, CEO and Director of Guidewire Software, Inc. (NYSE:GWRE), sold 1,200 shares of the company's common stock on July 27, 2026, at $142.31 per share, as disclosed in a filing with the Securities and Exchange Commission. This sale was conducted under a Rule 10b5-1 trading plan adopted in October 2025, which allows insiders to set predetermined trading schedules to mitigate concerns about trading on material nonpublic information. Post-transaction, Rosenbaum retains direct beneficial ownership of 192,576 shares in the software firm.
Key Points
- Stock Symbol: NYSE: GWRE
- CEO and Director Michael George Rosenbaum sold 1,200 shares on July 27, 2026
- Sale price: $142.31 per share; Shares retained: 192,576
- Transaction completed under a 10b5-1 trading plan established on October 14, 2025
Guidewire Software CEO's Stock Sale Details and Ownership Status
Michael George Rosenbaum, serving as both CEO and Director of Guidewire Software, Inc., completed a stock sale on July 27, 2026, disposing of 1,200 shares at $142.31 apiece. This insider transaction was reported through the SEC’s regulatory disclosure system, reflecting standard governance procedures for monitoring executive stock transactions.
The sale appears to be part of routine capital management or portfolio adjustment by Rosenbaum. Despite the sale, he continues to hold a significant equity stake with 192,576 shares directly owned, underscoring his ongoing personal investment in Guidewire. The filing does not provide commentary on the reasons behind the sale or the company’s financial outlook.
Rule 10b5-1 Trading Plan Ensures Compliance and Transparency
This transaction was executed pursuant to a Rule 10b5-1 trading plan that Rosenbaum put in place on October 14, 2025, over nine months before the sale date. Such plans enable corporate insiders to establish predetermined trading schedules, providing an affirmative defense against accusations of insider trading based on material nonpublic information, provided the plan complies with timing and execution requirements.
The regulatory filing confirms the sale was conducted automatically under this pre-established plan, with a checkbox indicating compliance with Rule 10b5-1(c) affirmative defense conditions. This approach is a common best practice among executives to manage equity sales within regulatory frameworks.
Significant Ongoing Equity Stake Reflects CEO’s Commitment
Following the sale, Rosenbaum’s direct ownership of 192,576 shares remains substantial, signaling alignment between his interests and those of shareholders. Investors and analysts often view such holdings as a positive indicator of leadership’s confidence in company performance. There is no indication of any change to Rosenbaum’s roles at Guidewire.
The disclosure does not detail Rosenbaum’s total beneficial ownership, including any indirect holdings via trusts or family entities, which may be available in other SEC filings such as proxy statements. Comprehensive insider ownership data is typically reviewed through annual Schedule 14A filings.
Attorney-in-Fact Facilitates Transaction Execution
The filing identifies Winston King as the attorney-in-fact who executed the sale on behalf of Rosenbaum. Utilizing an attorney-in-fact is a standard administrative practice allowing authorized representatives to carry out pre-planned trades. King signed the disclosure on the transaction date, July 27, 2026.
This delegation aligns with corporate governance norms, enabling smooth execution of trades established under Rule 10b5-1 plans. The filing does not provide further details about King’s relationship with Rosenbaum.
Direct Ownership and Transaction Specifics
The 192,576 shares retained are held in Rosenbaum’s name directly, without intermediaries, simplifying regulatory reporting. The transaction code "S" denotes a sale of securities, and no derivatives such as options or warrants were involved, indicating a straightforward stock sale rather than a complex equity restructuring.
Timing and Market Context of the Sale
The sale on July 27, 2026, corresponds to the execution date specified in the October 14, 2025 Rule 10b5-1 plan. Such plans typically define specific dates or price conditions for automatic trade execution to avoid discretionary decisions. The filing does not specify the plan’s detailed parameters.
The sale price of $142.31 per share is stated without analysis of market conditions or price favorability. Investors interested in broader market context should consult historical stock data and news from that period.
SEC Reporting Obligations for Insider Transactions
This filing fulfills Rosenbaum’s disclosure requirements under Section 16(a) of the Securities Exchange Act of 1934, mandating that officers, directors, and significant shareholders report changes in ownership. These disclosures are publicly accessible via the SEC’s EDGAR database, enhancing transparency around insider trading activities.
The form includes certifications affirming the accuracy of the disclosure, with legal warnings about false statements under federal law. The attorney-in-fact executed and dated the filing on July 27, 2026, ensuring regulatory compliance.
Insights into Executive Equity Management at Guidewire Software
While the disclosure is factual and limited to the transaction, it indicates that CEO Rosenbaum actively manages his equity holdings through a structured Rule 10b5-1 plan. The sizable remaining stake highlights equity ownership as a key component of his financial interest in the company’s success.
For a comprehensive understanding of Guidewire’s executive compensation, including salary, bonuses, equity grants, and vesting schedules, investors should review the company’s annual proxy statements filed with the SEC on Schedule 14A, which detail all aspects of named executive officers’ remuneration.
