Brian K. McCarthy - 16 Dec 2025 Form 4 Insider Report for Rubrik, Inc. (RBRK)

Reporting relationship: Pres.,Global Sales & Field Ops
Issuer ticker: RBRK
Reported as of: 16 Dec 2025
Net transaction value: -$365,455
SEC form: 4
Accepted by SEC: 18 Dec 2025, 20:00:09 UTC
Prior SEC filing: 10 Dec 2025
Next SEC filing: 13 Jan 2026
Source filing: View source filing
Reporting owner signature: /s/ Larry Guo, Attorney-in-Fact

Key filing fact

Brian K. McCarthy filed Form 4 for Rubrik, Inc. (RBRK) on 18 Dec 2025.

Key facts

This page summarizes Brian K. McCarthy's Form 4 filing for Rubrik, Inc. (RBRK).
6 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 18 Dec 2025, 20:00.

Change

Previous filing in this sequence was filed on 10 Dec 2025.
Current net transaction value: -$365,455.

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 0002020217 Primary reporting owner

McCarthy Brian K.

Relationship: Pres.,Global Sales & Field Ops
Address: C/O RUBRIK INC., 3495 DEER CREEK ROAD, PALO ALTO
Signature: /s/ Larry Guo, Attorney-in-Fact
Signature date: 18 Dec 2025

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: $0
Shares: +6,250
Change %: +1.8%
Price: $0.000000
Shares after: 345,569
Date: 16 Dec 2025
Ownership: Direct

RBRK transaction

Class A Common Stock

Sale

Transaction value: $217,189
Shares: -2,851
Change %: -0.83%
Price: $76.18
Shares after: 342,718
Date: 17 Dec 2025
Ownership: Direct
Footnotes: F1

RBRK transaction

Class A Common Stock

Sale

Transaction value: $148,266
Shares: -1,946
Change %: -0.57%
Price: $76.19
Shares after: 340,772
Date: 17 Dec 2025
Ownership: Direct
Footnotes: F1

Reported derivative securities

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

RBRK transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value: $0
Shares: -6,250
Change %: -50%
Price: $0.000000
Shares after: 6,250
Date: 16 Dec 2025
Ownership: Direct
Underlying class: Class B Common Stock
Underlying amount: 6,250
Exercise price
Footnotes: F2, F3

RBRK transaction Derivative

Class B Common Stock

Options Exercise

Transaction value
Shares: +6,250
Change %
Price
Shares after: 6,250
Date: 16 Dec 2025
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 6,250
Exercise price
Footnotes: F4

RBRK transaction Derivative

Class B Common Stock

Conversion of derivative security

Transaction value
Shares: -6,250
Change %: -100%
Price
Shares after: 0
Date: 16 Dec 2025
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 6,250
Exercise price
Footnotes: F4

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

This sale reported on this Form 4 was effected pursuant to the Issuer's policy requiring sell-to-cover to satisfy certain tax obligations of the Reporting Person incurred with the vesting and settlement of certain Restricted Stock Units (RSUs).

Footnote F2

Each RSU represents a contingent right to receive one share of Class B Common Stock.

Footnote F3

The RSUs shall vest as follows: 1/16 of the shares subject to the RSU vested on June 15, 2022, and 1/16 of the shares subject to the RSU vest every quarter thereafter, and a liquidity event-based vesting condition which was satisfied upon the effectiveness of the registration statement on Form S-1 filed by the Issuer in connection with the Issuer's initial public offering, all subject to the Reporting Person continuing to have a Service Relationship (as defined in the Issuer's Amended and Restated 2014 Stock Option and Grant Plan).

Footnote F4

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.