SEC Form 4 · accession 0002019143-26-000015

Rubrik, Inc. · RBRK

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Arvind Nithrakashyap

Officer — Chief Technology Officer · Director

Period of report

Jul 6, 2026

Accepted (ET)

Jul 8, 2026 · 7:01 pm EDT

Rule 10b5-1 plan

yes — trade under a plan

Issuer CIK

0001943896

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I
Class A Common Stock	Jul 6, 2026	C	12,820	$0.00	A	316,431	D
Class A Common Stock^F2	Jul 6, 2026	S	192	$83.37	D	316,239	D
Class A Common Stock^F3	Jul 6, 2026	S	257	$85.04	D	315,982	D
Class A Common Stock^F4	Jul 6, 2026	S	562	$85.56	D	315,420	D
Class A Common Stock^F5	Jul 6, 2026	S	665	$86.91	D	314,755	D
Class A Common Stock^F6	Jul 6, 2026	S	6,754	$87.66	D	308,001	D
Class A Common Stock^F7	Jul 6, 2026	S	4,129	$88.69	D	303,872	D
Class A Common Stock^F8	Jul 6, 2026	S	261	$89.28	D	303,611	D
Class A Common Stock	Jul 7, 2026	C	12,820	$0.00	A	316,431	D
Class A Common Stock^F9	Jul 7, 2026	S	749	$85.44	D	315,682	D
Class A Common Stock^F10	Jul 7, 2026	S	1,821	$86.45	D	313,861	D
Class A Common Stock^F11	Jul 7, 2026	S	4,957	$87.32	D	308,904	D
Class A Common Stock^F12	Jul 7, 2026	S	3,978	$88.33	D	304,926	D
Class A Common Stock^F13	Jul 7, 2026	S	1,315	$89.13	D	303,611	D
Class A Common Stock	Jul 8, 2026	C	12,820	$0.00	A	316,431	D
Class A Common Stock^F14	Jul 8, 2026	S	6,728	$84.02	D	309,703	D
Class A Common Stock^F15	Jul 8, 2026	S	4,233	$84.87	D	305,470	D
Class A Common Stock^F16	Jul 8, 2026	S	1,446	$85.67	D	304,024	D
Class A Common Stock^F17	Jul 8, 2026	S	413	$86.81	D	303,611	D

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Class B Common Stock^F18	—	Jul 6, 2026	C	12,820	D	—	—	Class A Common Stock	12,820	10,120,492	D
Class B Common Stock^F18	—	Jul 7, 2026	C	12,820	D	—	—	Class A Common Stock	12,820	10,107,672	D
Class B Common Stock^F18	—	Jul 8, 2026	C	12,820	D	—	—	Class A Common Stock	12,820	10,094,852	D
Class B Common Stock^F19,F18	—	holding	—	—	—	—	—	Class A Common Stock	200,000	200,000	I

Explanation of responses

F1This sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan, adopted October 15, 2025.
F10The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $85.825 to $86.81 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.
F11The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $86.825 to $87.8225 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.
F12The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $87.825 to $88.7625 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.
F13The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $88.85 to $89.525 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.
F14The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $83.405 to $84.38 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.
F15The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $84.4075 to $85.39 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.
F16The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $85.405 to $86.325 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.
F17The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $86.6075 to $87.26 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.
F18Each 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 and has no expiration date.
F19The 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.
F2The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $83.22 to $83.415 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.
F3The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $84.8725 to $85.1475 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.
F4The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $85.305 to $86.02 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.
F5The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $86.38 to $87.195 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.
F6The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $87.22 to $88.215 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.
F7The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $88.22 to $89.215 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.
F8The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $89.235 to $89.31 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.
F9The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $84.825 to $85.82 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.