Rubrik Officer Arvind Nithrakashyap Files Form 144 to Sell $11.7M in Class A Common Stock

Executive Summary

On September 8, 2026, Arvind Nithrakashyap, an Officer of Rubrik, Inc. ($RBRK), filed a Form 144 notifying the SEC of an intent to sell 128,200 shares of Class A Common Stock with an estimated aggregate market value of $11,746,966 (approx. $91.63 per share).

Transaction Details

• Security: Class A Common Stock
• Number of Shares: 128,200
• Aggregate Market Value: $11,746,966
• Outstanding Shares: 167,367,143 (sale represents ~0.08% of total outstanding shares)
• Broker: Goldman Sachs & Co. LLC
• Origin of Shares: Acquired via Restricted Stock Units (RSUs) on 01/16/2014 (73,156 shares) and 02/17/2021 (55,044 shares).

10b5-1 Trading Plan

The proposed sales are executed pursuant to a pre-arranged Rule 10b5-1 trading plan adopted on October 15, 2025, providing pre-determined execution timing and reducing discretionary trading concerns.

Recent Trading Activity

In the preceding three months, the reporting person completed several smaller sales totaling 76,920 shares:

• July 2026: 3 blocks of 12,820 shares on 07/06, 07/07, and 07/08 (~$3.33M total proceeds)
• August 2026: 3 blocks of 12,820 shares on 08/03, 08/04, and 08/05 (~$3.05M total proceeds)