Rubrik Director John W. Thompson Disposes of $1.58M in Class A Common Stock Under 10b5-1 Plan

Transaction Overview

On November 2, 2026, John Wendell Thompson, a member of the Board of Directors of Rubrik, Inc. ($RBRK), executed a series of non-derivative and derivative transactions involving both direct and indirect holdings:

1. Option Exercise & Conversion:

   • Exercised an employee stock option (right to buy) for 11,000 shares of Class B Common Stock at an exercise price of $4.38 per share.
   • Converted the 11,000 Class B shares into Class A Common Stock on a 1-for-1 basis.

2. Open Market Dispositions:

   • Direct Dispositions: Sold 11,000 shares of Class A Common Stock in eight price tranches ranging from $114.55 to $122.37, generating $1,290,008.75.
   • Indirect Dispositions: Sold 2,500 shares of Class A Common Stock held by the John and Sandra Thompson Trust in six price tranches ranging from $114.62 to $122.82, generating $293,184.00.
   • Combined total realization: 13,500 shares sold for approximately $1,583,192.75 at an average weighted price of ~$117.27 per share.

Pre-Planned Trading Plan

All sales reported in this filing were executed pursuant to a Rule 10b5-1 trading plan established on October 6, 2025. Under SEC regulations, transactions executed under a valid 10b5-1 plan reflect pre-scheduled automated trading rather than discretionary, opportunistic decisions based on material non-public information.

Post-Transaction Beneficial Ownership

• Class A Common Stock (Direct): 8,362 shares
• Class A Common Stock (Indirect via Trust): 2,500 shares
• Class B Common Stock (Direct): 50,001 shares
• Class B Common Stock (Indirect via Trust): 815,338 shares
• Stock Options (Direct): 44,946 shares