Rubrik, Inc. — Director's Dealing 2026

Jan 7, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Rubrik, Inc. (RBRK)
CIK: 0001943896
Period of Report: 2026-01-05

Reporting Person: THOMPSON JOHN WENDELL (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-01-05	Class A Common Stock	C	2500	—	Acquired	3498	Indirect
2026-01-05	Class A Common Stock	S	1800	$73.61	Disposed	1698	Indirect
2026-01-05	Class A Common Stock	S	600	$74.41	Disposed	1098	Indirect
2026-01-05	Class A Common Stock	S	100	$75.19	Disposed	998	Indirect
2026-01-05	Class A Common Stock	C	11000	—	Acquired	13702	Direct
2026-01-05	Class A Common Stock	S	7100	$73.56	Disposed	6602	Direct
2026-01-05	Class A Common Stock	S	3600	$74.29	Disposed	3002	Direct
2026-01-05	Class A Common Stock	S	300	$75.07	Disposed	2702	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-01-05	Class B Common Stock	$	C	2500	Disposed		Class A Common Stock (2500)	Indirect
2026-01-05	Stock Option (Right to Buy)	$4.38	M	11000	Disposed	2028-01-21	Class B Common Stock (11000)	Direct
2026-01-05	Class B Common Stock	$	M	11000	Acquired		Class A Common Stock (11000)	Direct
2026-01-05	Class B Common Stock	$	C	11000	Disposed		Class A Common Stock (11000)	Direct

Footnotes

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: This sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan, adopted October 6, 2025.

F3: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $73.08 to $73.96 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.

F4: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $74.12 to $74.71 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.

F5: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $72.92 to $73.91 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.

F6: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $73.92 to $74.88 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.

F7: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $74.96 to $75.19 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.

F8: 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.

F9: Fully vested.