Arvind Nithrakashyap - 05 Oct 2026 Form 4 Insider Report for Rubrik, Inc. (RBRK)

Reporting relationship: Chief Technology Officer, Director
Issuer ticker: RBRK
Reported as of: 05 Oct 2026
Net transaction value: -$4,781,315
SEC form: 4
Accepted by SEC: 07 Oct 2026, 18:55:58 UTC
Prior SEC filing: 17 Sep 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 07 Oct 2026.

Key facts

This page summarizes Arvind Nithrakashyap's Form 4 filing for Rubrik, Inc. (RBRK).
20 reported transactions and 4 derivative rows are listed below.
Accepted by SEC: 07 Oct 2026, 18:55.

Change

Previous filing in this sequence was filed on 17 Sep 2026.
Current net transaction value: -$4,781,315.

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: 07 Oct 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: +2,501
Change %: +0.88%
Price: $0.000000^*
Shares after: 285,358
Date: 05 Oct 2026
Ownership: Direct

RBRK transaction

Class A Common Stock

Sale

Transaction value: $58,865
Shares: -495
Change %: -0.17%
Price: $118.92
Shares after: 284,863
Date: 05 Oct 2026
Ownership: Direct
Footnotes: F1, F2

RBRK transaction

Class A Common Stock

Sale

Transaction value: $13,229
Shares: -110
Change %: -0.04%
Price: $120.26
Shares after: 284,753
Date: 05 Oct 2026
Ownership: Direct
Footnotes: F1, F3

RBRK transaction

Class A Common Stock

Sale

Transaction value: $109,201
Shares: -901
Change %: -0.32%
Price: $121.20
Shares after: 283,852
Date: 05 Oct 2026
Ownership: Direct
Footnotes: F1, F4

RBRK transaction

Class A Common Stock

Sale

Transaction value: $341,582
Shares: -2,801
Change %: -0.99%
Price: $121.95
Shares after: 281,051
Date: 05 Oct 2026
Ownership: Direct
Footnotes: F1, F5

RBRK transaction

Class A Common Stock

Sale

Transaction value: $688,744
Shares: -5,600
Change %: -2%
Price: $122.99
Shares after: 275,451
Date: 05 Oct 2026
Ownership: Direct
Footnotes: F1, F6

RBRK transaction

Class A Common Stock

Sale

Transaction value: $360,629
Shares: -2,913
Change %: -1.1%
Price: $123.80
Shares after: 272,538
Date: 05 Oct 2026
Ownership: Direct
Footnotes: F1, F7

RBRK transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +12,820
Change %: +4.7%
Price: $0.000000^*
Shares after: 285,358
Date: 06 Oct 2026
Ownership: Direct

RBRK transaction

Class A Common Stock

Sale

Transaction value: $72,954
Shares: -582
Change %: -0.2%
Price: $125.35
Shares after: 284,776
Date: 06 Oct 2026
Ownership: Direct
Footnotes: F1, F8

RBRK transaction

Class A Common Stock

Sale

Transaction value: $1,400,280
Shares: -11,101
Change %: -3.9%
Price: $126.14
Shares after: 273,675
Date: 06 Oct 2026
Ownership: Direct
Footnotes: F1, F9

RBRK transaction

Class A Common Stock

Sale

Transaction value: $135,624
Shares: -1,069
Change %: -0.39%
Price: $126.87
Shares after: 272,606
Date: 06 Oct 2026
Ownership: Direct
Footnotes: F1, F10

RBRK transaction

Class A Common Stock

Sale

Transaction value: $8,684
Shares: -68
Change %: -0.02%
Price: $127.70
Shares after: 272,538
Date: 06 Oct 2026
Ownership: Direct
Footnotes: F1, F11

RBRK transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +12,820
Change %: +4.7%
Price: $0.000000^*
Shares after: 285,358
Date: 07 Oct 2026
Ownership: Direct

RBRK transaction

Class A Common Stock

Sale

Transaction value: $182,267
Shares: -1,478
Change %: -0.52%
Price: $123.32
Shares after: 283,880
Date: 07 Oct 2026
Ownership: Direct
Footnotes: F1, F12

RBRK transaction

Class A Common Stock

Sale

Transaction value: $1,026,390
Shares: -8,274
Change %: -2.9%
Price: $124.05
Shares after: 275,606
Date: 07 Oct 2026
Ownership: Direct
Footnotes: F1, F13

RBRK transaction

Class A Common Stock

Sale

Transaction value: $381,233
Shares: -3,055
Change %: -1.1%
Price: $124.79
Shares after: 272,551
Date: 07 Oct 2026
Ownership: Direct
Footnotes: F1, F14

RBRK transaction

Class A Common Stock

Sale

Transaction value: $1,632
Shares: -13
Change %: -0%
Price: $125.57
Shares after: 272,538
Date: 07 Oct 2026
Ownership: Direct
Footnotes: F1

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: -2,501
Change %: -0.02%
Price: $0.000000^*
Shares after: 10,025,749
Date: 05 Oct 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 2,501
Exercise price
Footnotes: F15

RBRK transaction Derivative

Class B Common Stock

Conversion of derivative security

Transaction value
Shares: -12,820
Change %: -0.13%
Price: $0.000000^*
Shares after: 10,012,929
Date: 06 Oct 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 12,820
Exercise price
Footnotes: F15

RBRK transaction Derivative

Class B Common Stock

Conversion of derivative security

Transaction value
Shares: -12,820
Change %: -0.13%
Price: $0.000000^*
Shares after: 10,000,109
Date: 07 Oct 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 12,820
Exercise price
Footnotes: F15

RBRK holding Derivative

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 200,000
Date: 05 Oct 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: F15, F16

^* 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 16 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 $118.48 to $119.47 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 $120.065 to $120.425 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 $120.54 to $121.4775 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 $121.49 to $122.45 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 $122.48 to $123.475 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 $123.49 to $124.17 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 $124.655 to $125.61 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 $125.675 to $126.645 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 $126.655 to $127.445 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 $127.69 to $127.70 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 $122.565 to $123.55 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 $123.565 to $124.56 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

The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $124.5725 to $125.535 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 F15

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 F16

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.