Form 4: Rubrik Director Sells Shares Under 10b5-1 Plan

Rubrik, Inc. Director John Wendell Thompson has reported the sale of Class A Common Stock valued at over $1.5 million, executed under a pre-arranged Rule 10b5-1 trading plan.

Summary

• Director John Wendell Thompson of Rubrik, Inc. has reported transactions involving Class A Common Stock on July 1, 2026.
• These transactions include the sale of various amounts of Class A Common Stock at weighted average prices ranging from $81.50 to $83.81 per share.
• The total value of the reported sales exceeds $1.5 million.
• The sales were conducted pursuant to a Rule 10b5-1 trading plan adopted on October 6, 2025.
• Thompson also acquired 11,000 shares of Class A Common Stock through the conversion of Class B Common Stock, which is automatically convertible under certain conditions or at his option.
• Beneficial ownership of some shares is held indirectly by the John and Sandra Thompson Trust, where John Wendell Thompson serves as a co-trustee.

Sentiment

Score: 4

Explanation: StockSavvy.ai views this as a neutral to slightly negative filing due to the significant volume of shares sold by a director, despite being executed under a pre-planned Rule 10b5-1 trading plan.

Positives

• The transactions were executed under a Rule 10b5-1 trading plan, indicating pre-planned and potentially less market-impactful sales.
• The acquisition of 11,000 Class A Common Stock shares through conversion of Class B Common Stock suggests continued direct or indirect beneficial ownership and potential for future equity growth.

Negatives

• A significant number of Class A Common Stock shares were sold by a director, totaling over $1.5 million.
• The sales occurred at prices below the current market value, as indicated by the weighted average prices reported.

Risks

• The sale of a substantial number of shares by a director could be interpreted by the market as a lack of confidence in the company's immediate future stock performance, although it was executed under a pre-existing plan.
• The conversion of Class B Common Stock to Class A Common Stock, while a standard conversion, represents a shift in the reporting person's holdings.

Future Outlook

The filing does not contain forward-looking statements or guidance. It solely reports on past transactions.

Management Comments

• The sales were effected pursuant to a Rule 10b5-1 trading plan adopted on October 6, 2025.
• The reporting person undertakes to provide full information regarding the number of shares sold at each separated price within the range set forth in the footnotes upon request.

Industry Context

StockSavvy.ai notes that insider selling, even under a 10b5-1 plan, can sometimes create short-term negative sentiment for a stock, especially in the technology sector where rapid growth and investor confidence are key drivers. Rubrik operates in the cloud data security and management space, a highly competitive and evolving market.

Related Party Transactions

• Shares are held of record by John and Sandra Thompson Trust, for which the Reporting Person serves as a co-trustee and shares voting and dispositive power with his spouse.

Stakeholder Impact

• Shareholders: May perceive the director's sales as a negative signal, potentially impacting short-term stock price, though the 10b5-1 plan mitigates concerns about non-public information.
• Employees: May be influenced by insider selling sentiment, though internal stock option/grant programs are separate.
• Management: The transaction is a personal financial decision by a director, not directly impacting operational management.

Next Steps

• Continued monitoring of insider transactions for any further sales or purchases.
• Analysis of Rubrik's upcoming financial reports and strategic announcements to gauge company performance and future outlook.

Key Dates

Recommendation

The filing reports a director selling shares under a pre-established 10b5-1 plan. While significant selling can be a negative signal, the plan's existence suggests the sales are not based on new, non-public information. The conversion of Class B to Class A stock is also a routine event. Without further context on Rubrik's financial performance or future prospects, a 'hold' recommendation is prudent, balancing the insider selling with the structured nature of the transactions.

Keywords

Rubrik, RBRK, Form 4, Insider Trading, Stock Sale, Rule 10b5-1, Director Transaction, Class A Common Stock, Beneficial Ownership, SEC Filing