Rubrik CTO Arvind Nithrakashyap Sells $3.49M in Class A Shares Under Rule 10b5-1 Plan

Executive Summary

On September 8–10, 2026, Arvind Nithrakashyap, Chief Technology Officer and Director of Rubrik, Inc. ($RBRK), executed transactions converting 38,460 shares of Class B Common Stock into Class A Common Stock and subsequently selling them on the open market. The sales yielded aggregate proceeds of approximately $3,489,619.36 at weighted average prices between $87.55 and $92.87.

Transaction Details

• Security: Class A Common Stock
• Total Shares Sold: 38,460 shares across multiple tranches between September 8 and September 10, 2026.
• Aggregate Proceeds: $3,489,619.36
• Rule 10b5-1 Plan: All sales were executed pursuant to a Rule 10b5-1 trading plan established on October 15, 2025.

Post-Transaction Holdings

• Direct Class A Common Stock: 293,293 shares
• Direct Class B Common Stock: 10,028,250 shares
• Indirect Class B Common Stock: 200,000 shares held via the Nithrakashyap/Chatterjee Revocable Trust

Market & Governance Context

The insider retains substantial ownership in Rubrik, holding over 10.2 million Class B convertible shares. The transactions represent a routine liquidation under a pre-established 10b5-1 trading plan.