John Wendell Thompson - 14 Jan 2026 Form 4 Insider Report for Rubrik, Inc. (RBRK)

Role: Director
Signature: /s/ Larry Guo, Attorney-in-Fact
Issuer symbol: RBRK
Transactions as of: 14 Jan 2026
Net transactions value: $0
Form type: 4
Filing time: 16 Jan 2026, 20:00:07 UTC
Previous filing: 06 Jan 2026
Next filing: 03 Feb 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	16 Jan 2026	0001207433

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	+27,500	+2756%	$0.000000	28,498	14 Jan 2026	By John and Sandra Thompson Trust	F1
transaction	RBRK	Class A Common Stock	Award	$0	-953	-21%	$0.000000	3,655	15 Jan 2026	Direct	F2

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		-27,500	-3.3%		815,338	14 Jan 2026	Class A Common Stock	27,500		By John and Sandra Thompson Trust	F1, F3
holding	RBRK	Class B Common Stock						50,001	14 Jan 2026	Class A Common Stock	50,001		Direct	F3

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

Explanation of Responses:

Id	Content
F1	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.
F2	Represents the grant of restricted stock units that are fully vested as of the date of grant.
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.