Kiran Kumar Choudary - 16 Dec 2025 Form 4 Insider Report for Rubrik, Inc. (RBRK)

Role: Chief Financial Officer
Signature: /s/ Larry Guo, Attorney-in-Fact
Issuer symbol: RBRK
Transactions as of: 16 Dec 2025
Net transactions value: -$516,452
Form type: 4
Filing time: 18 Dec 2025, 20:00:07 UTC
Previous filing: 10 Dec 2025
Next filing: 23 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Choudary Kiran Kumar	Chief Financial Officer	C/O RUBRIK INC., 3495 DEER CREEK ROAD, PALO ALTO	/s/ Larry Guo, Attorney-in-Fact	18 Dec 2025	0002020220

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	RBRK	Class A Common Stock	Conversion of derivative security	$0	+7,187	+1.4%	$0.000000	514,738	16 Dec 2025	Direct
transaction	RBRK	Class A Common Stock	Sale	$303,501	-3,984	-0.77%	$76.18	510,754	17 Dec 2025	Direct	F1
transaction	RBRK	Class A Common Stock	Sale	$212,951	-2,795	-0.55%	$76.19	507,959	17 Dec 2025	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	RBRK	Restricted Stock Units	Options Exercise	$0	-7,187	-50%	$0.000000	7,188	16 Dec 2025	Class B Common Stock	7,187		Direct	F2, F3
transaction	RBRK	Class B Common Stock	Options Exercise		+7,187			7,187	16 Dec 2025	Class A Common Stock	7,187		Direct	F4
transaction	RBRK	Class B Common Stock	Conversion of derivative security		-7,187	-100%		0	16 Dec 2025	Class A Common Stock	7,187		Direct	F4

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
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	Each RSU represents a contingent right to receive one share of Class B Common Stock.
F3	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).
F4	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.