144 0002020220 XXXXXXXX LIVE 0001943896 RUBRIK, INC. 001-42028 3495 DEER CREEK ROAD Palo Alto CA 94304 8444782745 KIRAN CHOUDARY Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

48000 4226400.00 160956763 07/15/2026 NYSE Common 07/15/2026 Exercise of Stock Options Issuer N 20000 07/15/2026 Cash Common 04/25/2024 Restricted Stock Units Issuer N 28000 04/25/2024 N/A Y The securities to be sold were and will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment were and will be the dates of exercise/sale. 07/15/2026 04/15/2026 /s/ Kiran Choudary