MARK D. MCLAUGHLIN - 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, 20:00:11 UTC
Previous filing: 01 Oct 2025
Next filing: 05 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
MCLAUGHLIN MARK D	Director	C/O RUBRIK INC., 3495 DEER CREEK ROAD, PALO ALTO	/s/ Larry Guo, Attorney-in-Fact	18 Dec 2025	0001309507

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	Class B Common Stock	Options Exercise		+16,668	+50%		50,000	16 Dec 2025	Class A Common Stock	16,668		Direct	F3
holding	RBRK	Class B Common Stock						21,228	16 Dec 2025	Class A Common Stock	21,228		By McLaughlin Revocable Living Trust	F3, F4

* 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	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.
F4	The shares are held of record by McLaughlin Revocable Living Trust, for which the Reporting Person serves as a co-trustee and shares voting and dispositive power with his spouse.