Rubrik insider selling draws attention after CTO and directors report approximately $20.1 million in June stock sales.
Insider Trading
June 4, 2026
Table of Contents
June 4, 2026
Multiple insiders at Rubrik, Inc. (NYSE: RBRK) reported stock sales totaling approximately $20.1 million across June 1, June 2, and June 3, according to Form 4 filings with the U.S. Securities and Exchange Commission (SEC).
The reported sales involved Chief Technology Officer and director Arvind Nithrakashyap, director John Wendell Thompson, and director Yvonne Wassenaar.
Rubrik is a cybersecurity and data security company focused on cloud data protection, cyber recovery, ransomware resilience, backup, and enterprise data management.
Arvind Nithrakashyap accounted for nearly all of the reported June selling.
Nithrakashyap sold 199,447 shares on June 1 at $84.28 per share for approximately $16.8 million. He also sold 12,820 shares on June 2 at $82.16 per share for approximately $1.1 million and another 12,820 shares on June 3 at $78.89 per share for approximately $1.0 million.
Across the three transactions, Nithrakashyap sold approximately $18.9 million worth of RBRK stock. After the latest reported sale, he owned 314,048 shares directly.
John Wendell Thompson, a director, sold 13,500 shares on June 1 at $84.54 per share for approximately $1.1 million. After the sale, Thompson owned 4,653 shares indirectly.
Yvonne Wassenaar, a director, sold 721 shares on June 3 at $80.73 per share for approximately $58,200. After the sale, Wassenaar owned 2,326 shares directly.
The sales are notable because they involved multiple insiders within a short period.
Insider sales above $1 million are generally worth reviewing, while clustered selling above $5 million to $10 million can become more relevant when several insiders sell around the same time.
In this case, the total exceeded $20 million, with the largest transaction coming from a senior technology executive and director.
The Form 4 filings indicate that at least some of the transactions were made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1 conditions.
That lowers the signal strength compared with discretionary open-market selling.
Insider selling can happen for many reasons, including diversification, tax planning, liquidity planning, or pre-arranged trading programs. Still, the size of the CTO sale and the clustering across multiple insiders make the filings relevant for investors tracking insider behavior.
Large insider sales become more meaningful when they involve senior leadership, exceed common dollar thresholds, or appear across multiple filings within a short period.
Platforms like LevelFields aggregate insider transactions and flag when activity exceeds key thresholds, helping investors identify when executive selling exceeds key thresholds and may signal a meaningful shift in ownership behavior.
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