Rubrik officer plans sale of 128K shares

Rhea-AI Filing Summary

Rubrik, Inc. (RBRK) officer Arvind Nithrakashyap has filed a notice to sell up to 128,200 shares of Class A common stock of Rubrik through Goldman Sachs & Co. LLC, with an aggregate market value of $11,746,966, while Rubrik had 167,367,143 shares outstanding of this class; this is a baseline figure, not the amount being offered.

The shares to be sold were acquired as compensation in the form of Restricted Stock Units granted on January 16, 2014 (73,156 shares) and February 17, 2021 (55,044 shares. In the past three months, Nithrakashyap has reported several sales of 12,820 shares each on multiple dates. The filing states these sales are made under a Rule 10b5-1(c) selling plan dated October 15, 2025.

Key Figures

Shares to be sold: 128,200 shares Aggregate market value of planned sale: $11,746,966 Shares outstanding: 167,367,143 shares +4 more

7 metrics

Shares to be sold 128,200 shares Class A common stock covered by the Form 144 notice

Aggregate market value of planned sale $11,746,966 Value of 128,200 Class A shares to be sold

Shares outstanding 167,367,143 shares Rubrik Class A common stock outstanding as stated in the notice

RSU grant 2021 55,044 shares Class A shares acquired as compensation from RSUs dated February 17, 2021

RSU grant 2014 73,156 shares Class A shares acquired as compensation from RSUs dated January 16, 2014

Recent sale lot size 12,820 shares Share amount in each of several sales in July and August 2026

Plan date October 15, 2025 Date of the selling plan intended to comply with Rule 10b5-1(c)

Key Terms

Rule 144, Rule 10b5-1(c), Restricted Stock Units, selling plan

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Rule 10b5-1(c) regulatory

"selling plan dated 10/15/2025, that is intended to comply with Rule 10b5-1(c)"

Rule 10b5-1(c) is an SEC guideline that lets company insiders set up a written, pre-planned schedule to buy or sell their company stock when they are not in possession of material, nonpublic information. For investors, it matters because such plans can reduce the appearance of insider trading by separating decisions from inside knowledge—like putting your trades on autopilot—while also requiring scrutiny since pre-planned trades can still affect market confidence and share value.

Restricted Stock Units financial

"Acquired as compensation -- Restricted Stock Units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

selling plan financial

"sales of shares set forth herein are made in connection with a selling plan"

FAQ

What does Rubrik (RBRK) disclose in this Form 144 about planned insider sales?

The notice states that officer Arvind Nithrakashyap plans to sell up to 128,200 shares of Rubrik Class A common stock through Goldman Sachs & Co. LLC, with an aggregate market value of $11,746,966, under Rule 144.

How many Rubrik (RBRK) shares are covered by the current Rule 144 filing?

The filing covers up to 128,200 shares of Rubrik Class A common stock. These shares are to be sold through Goldman Sachs & Co. LLC on the NYSE, with a stated aggregate market value of $11,746,966.

What is the source of the Rubrik (RBRK) shares Arvind Nithrakashyap plans to sell?

The shares were acquired as compensation via Restricted Stock Units granted by Rubrik, including 55,044 shares from an award dated February 17, 2021 and 73,156 shares from an award dated January 16, 2014.

What recent sales of Rubrik (RBRK) stock by Arvind Nithrakashyap are disclosed?

Over the past three months, the notice lists multiple sales of 12,820 shares of Rubrik Class A common stock on several dates in July and August 2026, each with reported dollar proceeds for those transactions.

Is there a trading plan associated with these Rubrik (RBRK) insider sales?

Yes. The filing states that the sales are made in connection with a selling plan dated October 15, 2025 that is intended to comply with Rule 10b5-1(c), providing for pre-arranged trading of the shares.

How many Rubrik (RBRK) Class A shares were outstanding in relation to this Form 144?

The notice reports that there were 167,367,143 shares of Rubrik Class A common stock outstanding. This figure provides context for the size of the planned sale but is not the amount being sold.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/08/2026 - 07:22 PM Accepted by SEC EDGAR 09/08/2026 - 07:21 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002019143
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Rubrik, Inc.
SEC File Number	001-42028
Address of Issuer	3495 Deer Creek Road Palo Alto CALIFORNIA 94304
Phone	1-844-478-2745
Name of Person for Whose Account the Securities are To Be Sold	Arvind Nithrakashyap
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Class A Common Stock	Goldman Sachs & Co. LLC 200 West Street New York NY 10282	128200	11746966	167367143	09/08/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Class A Common Stock	02/17/2021	Acquired as compensation -- Restricted Stock Units	The Issuer			55044	02/17/2021	Compensation
Class A Common Stock	01/16/2014	Acquired as compensation -- Restricted Stock Units	The Issuer			73156	01/16/2014	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Arvind Nithrakashyap 3495 Deer Creek Road Palo Alto CA 94304	Class A Common Stock	07/07/2026	12820	1122869.19
Arvind Nithrakashyap 3495 Deer Creek Road Palo Alto CA 94304	Class A Common Stock	08/03/2026	12820	949226.13
Arvind Nithrakashyap 3495 Deer Creek Road Palo Alto CA 94304	Class A Common Stock	08/04/2026	12820	1023189.84
Arvind Nithrakashyap 3495 Deer Creek Road Palo Alto CA 94304	Class A Common Stock	07/08/2026	12820	1084282.27
Arvind Nithrakashyap 3495 Deer Creek Road Palo Alto CA 94304	Class A Common Stock	07/06/2026	12820	1125322.93
Arvind Nithrakashyap 3495 Deer Creek Road Palo Alto CA 94304	Class A Common Stock	08/05/2026	12820	1073098.1

144: Remarks and Signature

Remarks	The sales of shares set forth herein are made in connection with a selling plan dated 10/15/2025, that is intended to comply with Rule 10b5-1(c).
Date of Notice	09/08/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	10/15/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Goldman Sachs & Co. LLC on behalf of Arvind Nithrakashyap
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)