X0508 4/A 2025-12-12 2025-12-15 0001943896 Rubrik, Inc. RBRK 0001366050 Mhatre Ravi 2200 SAND HILL ROAD MENLO PARK CA 94025 true false false false 0 Class A Common Stock 2025-12-12 4 S 0 3707 84.96 D 1600 I By Lightspeed Management Company, L.L.C. Class A Common Stock 2025-12-12 4 S 0 1600 85.99 D 0 I By Lightspeed Management Company, L.L.C. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $84.60 to $85.31 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Shares are held by Lightspeed Management Company, L.L.C. ("LMC"). The Reporting Person is a managing member of LMC and shares voting and dispositive power with respect to the shares held by LMC. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein. This Form 4 amendment is being filed to correct the original Form 4 filed on December 15, 2025 which inadvertently omitted sales by LMC on December 12, 2025 /s/ Ravi Mhatre 2026-01-16