Arvind Nithrakashyap - 23 Dec 2025 Form 4 Insider Report for Rubrik, Inc. (RBRK)

Role: Chief Technology Officer, Director
Signature: /s/ Larry Guo, Attorney-in-Fact
Issuer symbol: RBRK
Transactions as of: 23 Dec 2025
Net transactions value: $0
Form type: 4
Filing time: 23 Dec 2025, 19:27:44 UTC
Previous filing: 18 Dec 2025
Next filing: 16 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Nithrakashyap Arvind	Chief Technology Officer, Director	C/O RUBRIK INC., 3495 DEER CREEK ROAD, PALO ALTO	/s/ Larry Guo, Attorney-in-Fact	23 Dec 2025	0002019143

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	+100,000	+29%	$0.000000	442,703	23 Dec 2025	Direct
transaction	RBRK	Class A Common Stock	Gift	$0	-100,000	-23%	$0.000000	342,703	23 Dec 2025	Direct

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	Class B Common Stock	Conversion of derivative security	$0	-100,000	-0.97%	$0.000000	10,230,945	23 Dec 2025	Class A Common Stock	100,000		Direct	F1
holding	RBRK	Class B Common Stock						200,000	23 Dec 2025	Class A Common Stock	200,000		By Arvind Nithrakashyap, as Trustee of the Nithrakashyap/Chatterjee Revocable Trust	F1, F2

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

Explanation of Responses:

Id	Content
F1	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 is also convertible at any time at the option of the Reporting Person into one share of Class A Common Stock.
F2	The shares are held of record by Arvind Nithrakashyap, as Trustee of the Nithrakashyap/Chatterjee Revocable Trust, for which the Reporting Person serves as trustee and shares voting and dispositive power with his spouse.

Content

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 is also convertible at any time at the option of the Reporting Person into one share of Class A Common Stock.

The shares are held of record by Arvind Nithrakashyap, as Trustee of the Nithrakashyap/Chatterjee Revocable Trust, for which the Reporting Person serves as trustee and shares voting and dispositive power with his spouse.