Rubrik, Inc. — Director's Dealing 2025

Sep 18, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Rubrik, Inc. (RBRK)
CIK: 0001943896
Period of Report: 2025-09-16

Reporting Person: Choudary Kiran Kumar (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-09-16	Class A Common Stock	C	7188	—	Acquired	522783	Direct
2025-09-16	Class A Common Stock	S	6599	$74.21	Disposed	516184	Direct
2025-09-17	Class A Common Stock	C	2000	—	Acquired	518184	Direct
2025-09-17	Class A Common Stock	S	3500	$74.82	Disposed	514684	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-09-16	Restricted Stock Units	$	M	7188	Disposed	2029-04-13	Class B Common Stock (7188)	Direct
2025-09-16	Class B Common Stock	$	M	7188	Acquired		Class A Common Stock (7188)	Direct
2025-09-16	Class B Common Stock	$	C	7188	Disposed		Class A Common Stock (7188)	Direct
2025-09-17	Stock Option (Right to Buy)	$7.99	M	2000	Disposed	2028-09-17	Class B Common Stock (2000)	Direct
2025-09-17	Class B Common Stock	$	M	2000	Acquired		Class A Common Stock (2000)	Direct
2025-09-17	Class B Common Stock	$	C	2000	Disposed		Class A Common Stock (2000)	Direct

Footnotes

F1: This sale reported on this Form 4 was effected pursuant to the Issuer's policy requiring sell-to-cover to satisfy certain tax obligations of the Reporting Person incurred with the vesting and settlement of certain Restricted Stock Units (RSUs).

F2: This sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan, adopted January 15, 2025.

F3: Each RSU represents a contingent right to receive one share of Class B Common Stock.

F4: The RSUs shall vest as follows: 1/16 of the shares subject to the RSU vested on June 15, 2022, and 1/16 of the shares subject to the RSU vest every quarter thereafter, and a liquidity event-based vesting condition which was satisfied upon the effectiveness of the registration statement on Form S-1 filed by the Issuer in connection with the Issuer's initial public offering, all subject to the Reporting Person continuing to have a Service Relationship (as defined in the Issuer's Amended and Restated 2014 Stock Option and Grant Plan).

F5: Each share of Class B Common Stock held by the Reporting Person will automatically convert into one share of Class A Common Stock upon the sale or transfer of such share of Class B Common Stock, subject to certain exceptions, and in certain other circumstances described in the Issuer's amended and restated certificate of incorporation. Each share of Class B Common Stock will also be convertible at any time at the option of the Reporting Person into one share of Class A Common Stock.

F6: 1/4 of the shares subject to the option vested on August 20, 2019, and 1/48 of the shares vested monthly thereafter.