Arvind Nithrakashyap - 08 Sep 2026 Form 4 Insider Report for Rubrik, Inc. (RBRK)

Reporting relationship: Chief Technology Officer, Director
Issuer ticker: RBRK
Reported as of: 08 Sep 2026
Net transaction value: -$3,489,619
SEC form: 4
Accepted by SEC: 10 Sep 2026, 20:46:56 UTC
Prior SEC filing: 05 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Anne-Kathrin Lalendran, Attorney-in-Fact

Key filing fact

Arvind Nithrakashyap filed Form 4 for Rubrik, Inc. (RBRK) on 10 Sep 2026.

Key facts

This page summarizes Arvind Nithrakashyap's Form 4 filing for Rubrik, Inc. (RBRK).
19 reported transactions and 4 derivative rows are listed below.
Accepted by SEC: 10 Sep 2026, 20:46.

Change

Previous filing in this sequence was filed on 05 Aug 2026.
Current net transaction value: -$3,489,619.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002019143 Primary reporting owner

Nithrakashyap Arvind

Relationship: Chief Technology Officer, Director
Address: C/O RUBRIK INC., 3495 DEER CREEK ROAD, PALO ALTO
Signature: /s/ Anne-Kathrin Lalendran, Attorney-in-Fact
Signature date: 10 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

RBRK transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +12,820
Change %: +4.4%
Price: $0.000000^*
Shares after: 306,113
Date: 08 Sep 2026
Ownership: Direct

RBRK transaction

Class A Common Stock

Sale

Transaction value: $250,220
Shares: -2,767
Change %: -0.9%
Price: $90.43
Shares after: 303,346
Date: 08 Sep 2026
Ownership: Direct
Footnotes: F1, F2

RBRK transaction

Class A Common Stock

Sale

Transaction value: $716,759
Shares: -7,836
Change %: -2.6%
Price: $91.47
Shares after: 295,510
Date: 08 Sep 2026
Ownership: Direct
Footnotes: F1, F3

RBRK transaction

Class A Common Stock

Sale

Transaction value: $203,853
Shares: -2,217
Change %: -0.75%
Price: $91.95
Shares after: 293,293
Date: 08 Sep 2026
Ownership: Direct
Footnotes: F1, F4

RBRK transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +12,820
Change %: +4.4%
Price: $0.000000^*
Shares after: 306,113
Date: 09 Sep 2026
Ownership: Direct

RBRK transaction

Class A Common Stock

Sale

Transaction value: $289,697
Shares: -3,243
Change %: -1.1%
Price: $89.33
Shares after: 302,870
Date: 09 Sep 2026
Ownership: Direct
Footnotes: F1, F5

RBRK transaction

Class A Common Stock

Sale

Transaction value: $478,902
Shares: -5,297
Change %: -1.7%
Price: $90.41
Shares after: 297,573
Date: 09 Sep 2026
Ownership: Direct
Footnotes: F1, F6

RBRK transaction

Class A Common Stock

Sale

Transaction value: $295,085
Shares: -3,237
Change %: -1.1%
Price: $91.16
Shares after: 294,336
Date: 09 Sep 2026
Ownership: Direct
Footnotes: F1, F7

RBRK transaction

Class A Common Stock

Sale

Transaction value: $93,277
Shares: -1,013
Change %: -0.34%
Price: $92.08
Shares after: 293,323
Date: 09 Sep 2026
Ownership: Direct
Footnotes: F1, F8

RBRK transaction

Class A Common Stock

Sale

Transaction value: $2,786
Shares: -30
Change %: -0.01%
Price: $92.87
Shares after: 293,293
Date: 09 Sep 2026
Ownership: Direct
Footnotes: F1

RBRK transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +12,820
Change %: +4.4%
Price: $0.000000^*
Shares after: 306,113
Date: 10 Sep 2026
Ownership: Direct

RBRK transaction

Class A Common Stock

Sale

Transaction value: $32,306
Shares: -369
Change %: -0.12%
Price: $87.55
Shares after: 305,744
Date: 10 Sep 2026
Ownership: Direct
Footnotes: F1, F9

RBRK transaction

Class A Common Stock

Sale

Transaction value: $54,452
Shares: -611
Change %: -0.2%
Price: $89.12
Shares after: 305,133
Date: 10 Sep 2026
Ownership: Direct
Footnotes: F1, F10

RBRK transaction

Class A Common Stock

Sale

Transaction value: $434,652
Shares: -4,844
Change %: -1.6%
Price: $89.73
Shares after: 300,289
Date: 10 Sep 2026
Ownership: Direct
Footnotes: F1, F11

RBRK transaction

Class A Common Stock

Sale

Transaction value: $424,864
Shares: -4,675
Change %: -1.6%
Price: $90.88
Shares after: 295,614
Date: 10 Sep 2026
Ownership: Direct
Footnotes: F1, F12

RBRK transaction

Class A Common Stock

Sale

Transaction value: $212,766
Shares: -2,321
Change %: -0.79%
Price: $91.67
Shares after: 293,293
Date: 10 Sep 2026
Ownership: Direct
Footnotes: F1, F13

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

RBRK transaction Derivative

Class B Common Stock

Conversion of derivative security

Transaction value
Shares: -12,820
Change %: -0.13%
Price: $0.000000^*
Shares after: 10,053,890
Date: 08 Sep 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 12,820
Exercise price
Footnotes: F14

RBRK transaction Derivative

Class B Common Stock

Conversion of derivative security

Transaction value
Shares: -12,820
Change %: -0.13%
Price: $0.000000^*
Shares after: 10,041,070
Date: 09 Sep 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 12,820
Exercise price
Footnotes: F14

RBRK transaction Derivative

Class B Common Stock

Conversion of derivative security

Transaction value
Shares: -12,820
Change %: -0.13%
Price: $0.000000^*
Shares after: 10,028,250
Date: 10 Sep 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 12,820
Exercise price
Footnotes: F14

RBRK holding Derivative

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 200,000
Date: 08 Sep 2026
Ownership: By Arvind Nithrakashyap, as Trustee of the Nithrakashyap/Chatterjee Revocable Trust
Underlying class: Class A Common Stock
Underlying amount: 200,000
Exercise price
Footnotes: F14, F15

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 15 footnotes

Footnote F1

This sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan, adopted October 15, 2025.

Footnote F2

The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $89.7975 to $90.79 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.

Footnote F3

The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $90.805 to $91.79 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.

Footnote F4

The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $91.80 to $92.195 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.

Footnote F5

The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $88.775 to $89.77 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.

Footnote F6

The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $89.805 to $90.77 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.

Footnote F7

The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $90.82 to $91.7625 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.

Footnote F8

The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $91.785 to $92.67 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.

Footnote F9

The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $87.31 to $88.05 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.

Footnote F10

The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $88.41 to $89.26 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.

Footnote F11

The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $89.315 to $90.2775 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.

Footnote F12

The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $90.315 to $91.30 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.

Footnote F13

The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $91.315 to $92.30 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.

Footnote F14

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 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.

Footnote F15

The 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.