X0609 4 2026-06-03 0001943896 Rubrik, Inc. RBRK 0001366050 Mhatre Ravi false 2200 SAND HILL ROAD MENLO PARK CA 94025 true false false false 0 Class A Common Stock 2026-06-03 4 A 0 3709 0 A 101603 D Class A Common Stock 442739 I By Mhatre Investments LP - Fund 2 Class A Common Stock 83909 I By Mhatre Investments LP - Fund 3 Class A Common Stock 649 I By Trust Represents the grant of restricted stock units ("RSUs") that will vest over a one-year period, in four (4) successive equal quarterly installments on each of September 15, 2026, December 15, 2026, March 15, 2027 and June 15, 2027, subject to the reporting person's continuous service with the Issuer on each such vest date. The Reporting Person serves as trustee of the general partner of Mhatre Investments LP - Fund 2. The Reporting Person serves as trustee of the general partner of Mhatre Investments LP - Fund 3. The Reporting Person is the trustee of the Mhatre 2011 Irrevocable Children's Trust. /s/ Larry Guo, Attorney-in-Fact 2026-06-05