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

Rubrik Director John Wendell Thompson executed multiple sales of Class A Common Stock totaling 13,500 shares on March 2, 2026, under a pre-arranged 10b5-1 trading plan.

Summary

• Director John Wendell Thompson engaged in several transactions involving Rubrik, Inc. (RBRK) securities on March 2, 2026.
• He sold a total of 13,500 shares of Class A Common Stock at weighted average prices ranging from $51.87 to $53.98 per share.
• These sales were conducted pursuant to a Rule 10b5-1 trading plan adopted on October 6, 2025.
• Thompson also exercised 11,000 stock options to acquire Class B Common Stock at an exercise price of $4.38 per share.
• Additionally, he converted 11,000 shares of Class B Common Stock into Class A Common Stock.
• Following these transactions, Thompson directly holds 4,653 shares of Class A Common Stock and 50,001 shares of Class B Common Stock.
• Indirectly, through the John and Sandra Thompson Trust, he holds 22,500 shares of Class A Common Stock and 815,338 shares of Class B Common Stock.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral event. While insider selling can sometimes be perceived negatively, the execution under a pre-arranged 10b5-1 plan mitigates concerns about immediate negative sentiment regarding the company's prospects.

Positives

• The sales were executed under a pre-arranged Rule 10b5-1 trading plan, indicating a planned divestment rather than an immediate reaction to new information.
• The exercise of stock options suggests the director is realizing value from previously granted equity.

Negatives

• Director John Wendell Thompson sold a significant number of Class A Common Stock shares (13,500 shares) at prices between $51.87 and $53.98.
• Insider selling, even under a 10b5-1 plan, can sometimes be perceived negatively by the market as it reduces the insider's direct stake.

Future Outlook

This filing does not contain specific forward-looking statements or guidance regarding Rubrik, Inc.'s future performance.

Industry Context

StockSavvy.ai notes that insider transactions, particularly those executed under Rule 10b5-1 plans, are common for executives and directors managing their personal portfolios. While these sales are pre-scheduled and not necessarily indicative of a change in company fundamentals, they are closely watched by investors for insights into insider sentiment and liquidity needs. Rubrik operates in the cloud data management and cybersecurity sector, where executive compensation often includes significant equity components.

Related Party Transactions

• Shares are held indirectly by the 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 observe a slight increase in the float of Class A Common Stock due to the sales and conversions, though the overall impact is likely minimal given the pre-planned nature of the transactions.

Key Dates

Recommendation

The filing details routine insider transactions under a pre-established 10b5-1 plan, which are generally not indicative of a change in the company's fundamental outlook. While there is insider selling, it is planned and not a reactive event. Therefore, a 'hold' recommendation is appropriate as this filing alone does not provide new information to warrant a change in investment thesis.

Keywords

Rubrik, RBRK, Form 4, Insider Trading, Stock Sale, Director, John Wendell Thompson, 10b5-1 Plan, Equity Transaction, Class A Common Stock, Class B Common Stock, Stock Option Exercise