John Wendell Thompson - 16 Dec 2025 Form 4 Insider Report for Rubrik, Inc. (RBRK)

Role: Director
Signature: /s/ Larry Guo, Attorney-in-Fact
Issuer symbol: RBRK
Transactions as of: 16 Dec 2025
Net transactions value: $0
Form type: 4
Filing time: 18 Dec 2025, 20:00:13 UTC
Previous filing: 02 Dec 2025
Next filing: 06 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
THOMPSON JOHN WENDELL	Director	C/O RUBRIK INC., 3495 DEER CREEK ROAD, PALO ALTO	/s/ Larry Guo, Attorney-in-Fact	18 Dec 2025	0001207433

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	-16,668	-100%	$0.000000	0	16 Dec 2025	Class B Common Stock	16,668		Direct	F1, F2
transaction	RBRK	Restricted Stock Units	Options Exercise	$0	-8,334	-100%	$0.000000	0	16 Dec 2025	Class B Common Stock	8,334		Direct	F1, F3
transaction	RBRK	Class B Common Stock	Options Exercise		+25,002	+100%		50,001	16 Dec 2025	Class A Common Stock	25,002		Direct	F4
holding	RBRK	Class B Common Stock						845,338	16 Dec 2025	Class A Common Stock	845,338		By John and Sandra Thompson Trust	F4, F5

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

Explanation of Responses:

Id	Content
F1	Each Restricted Stock Unit (RSU) represents a contingent right to receive one share of Class B Common Stock.
F2	The RSUs shall vest as follows: 1/3 of the shares subject to the RSU vested on December 15, 2023, and 1/3 of the shares subject to the RSU vest every year 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).
F3	The RSUs shall vest as follows: 1/3 of the shares subject to the RSU vested on December 15, 2023, and 1/3 of the shares subject to the RSU vest every year 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's continued service as Lead Independent Director of the Issuer's board of directors.
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.
F5	The shares are held of record by John and Sandra Thompson Trust, for which the Reporting Person serves as a co-trustee and shares voting and dispositive power with his spouse.