Bipul Sinha - 24 Sep 2026 Form 4 Insider Report for Rubrik, Inc. (RBRK)

Reporting relationship: Chairman of the Board and CEO, Director, 10%+ Owner
Issuer ticker: RBRK
Reported as of: 24 Sep 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 25 Sep 2026, 20:41:33 UTC
Prior SEC filing: 12 Sep 2025
Source filing: View source filing
Reporting owner signature: /s/ Anne-Kathrin Lalendran, Attorney-in-Fact

Key filing fact

Bipul Sinha filed Form 4 for Rubrik, Inc. (RBRK) on 25 Sep 2026.

Key facts

This page summarizes Bipul Sinha's Form 4 filing for Rubrik, Inc. (RBRK).
5 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 25 Sep 2026, 20:41.

Change

Previous filing in this sequence was filed on 12 Sep 2025.
Current net transaction value: $0.

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 0001685768 Primary reporting owner

Sinha Bipul

Relationship: Chairman of the Board and CEO, Director, 10%+ Owner
Address: C/O RUBRIK, INC., 3495 DEER CREEK ROAD, PALO ALTO
Signature: /s/ Anne-Kathrin Lalendran, Attorney-in-Fact
Signature date: 25 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: +500,000
Change %
Price
Shares after: 500,000
Date: 24 Sep 2026
Ownership: By SPV
Footnotes: F1, F2, F3

RBRK transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +55,000
Change %: +97%
Price
Shares after: 111,652
Date: 24 Sep 2026
Ownership: Direct
Footnotes: F1

RBRK transaction

Class A Common Stock

Gift

Transaction value
Shares: -55,000
Change %: -49%
Price: $0.000000^*
Shares after: 56,652
Date: 25 Sep 2026
Ownership: Direct

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: -555,000
Change %: -4.9%
Price: $0.000000^*
Shares after: 10,679,839
Date: 24 Sep 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 555,000
Exercise price
Footnotes: F1

RBRK transaction Derivative

Prepaid Variable Forward Contract (obligation to sell)

Other

Transaction value
Shares: +500,000
Change %
Price
Shares after: 500,000
Date: 25 Sep 2026
Ownership: By SPV
Underlying class: Class A Common Stock
Underlying amount: 500,000
Exercise price
Footnotes: F3, F4, F5

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

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.

Footnote F2

Represents 500,000 shares transferred on September 24, 2026 to an entity of which the reporting person is the sole equity member. The transfer was exempt under Rule 16a-13 as a change in the form of beneficial ownership without a change in pecuniary interest.

Footnote F3

The reporting person is the sole equity member of the SPV.

Footnote F4

On September 25, 2026, an entity of which the Reporting Person is the sole equity member (the "Entity") entered into a prepaid variable forward contract with an unaffiliated counterparty. The contract obligates the Entity to deliver to the counterparty up to 500,000 shares of the Issuer's Class A common stock (or, at the Entity's election, a cash settlement amount determined based on the market price of the Issuer's Class A common stock) on the scheduled settlement date of September 26, 2028. In exchange for assuming this obligation, the Entity is expected to receive a cash payment of $42,051,350 on September 28, 2026. The Entity pledged 500,000 shares of the Issuer's Class A common stock (the "Pledged Shares") to secure its obligations under the contract. In most instances, the Entity retains voting rights in the Pledged Shares during the term of the pledge.

Footnote F5

Subject to customary adjustments, the number of shares of Class A common stock deliverable at settlement will be determined as follows: (a) if the closing price of Class A common stock on September 25, 2028 ("Settlement Price") is less than or equal to $93.14 ("Forward Floor Price"), the Entity will deliver to the counterparty 500,000 shares of Class A common stock; (b) if the Settlement Price is between the Forward Floor Price and $165.58 (the "Forward Cap Price"), the Entity will deliver to the counterparty a number of shares of Class A common stock having a value, based on the Settlement Price, of $46,570,000; and (c) if the Settlement Price exceeds the Forward Cap Price, the Entity will deliver to the counterparty a variable number of shares of Class A common stock equal to 500,000 multiplied by the sum of (i) the Forward Floor Price and (ii) the excess of the Settlement Price over the Forward Cap Price, divided by the Settlement Price.