RBRK Form 144: RSU vesting sale of 6,805 shares; insider sold $2.43M recently

Rhea-AI Filing Summary

Rubrik, Inc. insider filing reports a proposed sale of 6,805 Class A common shares through Morgan Stanley Smith Barney LLC on the NYSE, with an aggregate market value of $514,458.00 and an approximate sale date of 09/16/2025. The shares were acquired as restricted stock units that vested on 09/15/2025 and are being sold as compensation. The filer has sold 27,757 shares in the past three months for total gross proceeds of $2,425,419.52, across seven transactions between 06/17/2025 and 09/03/2025. The notice includes the standard representation that the seller is not aware of undisclosed material adverse information.

Positive

• Transparency: Filing provides detailed disclosure of proposed sale, broker, dates, quantities, and past three months of sales.
• Clear acquisition source: Shares were acquired via RSU vesting, with nature of payment stated as compensation.

Negative

• Insider selling volume: The filer sold 27,757 shares in the past three months, generating $2,425,419.52, which may attract investor attention.

Insights

Securities/Financial Analyst

TL;DR: Routine Rule 144 notice reflecting RSU vesting and planned sale; recent insider sales total ~$2.43M.

The filing documents a common, non-exceptional disposition of shares resulting from RSU vesting, not an open-market purchase or debt-related transfer. The planned sale of 6,805 shares (value ~$514k) is consistent with the filer monetizing compensation. Recent sales of 27,757 shares generating $2,425,419.52 over three months indicate ongoing liquidation of vested equity rather than a single large divestiture. For investors, this is a disclosure of insider selling activity but lacks accompanying operational or financial information implying company distress.

Corporate Governance Expert

TL;DR: Disclosure is compliant and transparent; sales stem from compensation vesting, with standard attestation included.

The Form 144 is properly completed to show the nature of acquisition (RSU vesting) and payment type (compensation). It names the broker and provides dates and amounts for recent sales, fulfilling regulatory transparency expectations. The representation that the filer is unaware of undisclosed material adverse information is standard. This filing raises governance flags only to the extent investors monitor insider selling trends; no procedural or compliance issues are evident from the document itself.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 39th Floor New York NY 10004	6805	514458.00	142085609	09/16/2025	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	09/15/2025	Restricted Stock Units vesting under registered plan	Issuer			6805	09/15/2025	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
Kiran Kumar Choudary 3495 Deer Creek Road Palo Alto CA 94304	Class A Common Stock	06/17/2025	6757	598419.52
Kiran Kumar Choudary 3495 Deer Creek Road Palo Alto CA 94304	Class A Common Stock	06/25/2025	3500	318500.00
Kiran Kumar Choudary 3495 Deer Creek Road Palo Alto CA 94304	Class A Common Stock	07/09/2025	3500	306390.00
Kiran Kumar Choudary 3495 Deer Creek Road Palo Alto CA 94304	Class A Common Stock	07/23/2025	3500	293650.00
Kiran Kumar Choudary 3495 Deer Creek Road Palo Alto CA 94304	Class A Common Stock	08/06/2025	3500	309295.00
Kiran Kumar Choudary 3495 Deer Creek Road Palo Alto CA 94304	Class A Common Stock	08/20/2025	3500	290255.00
Kiran Kumar Choudary 3495 Deer Creek Road Palo Alto CA 94304	Class A Common Stock	09/03/2025	3500	308910.00

144: Remarks and Signature

Remarks

Date of Notice

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What shares is the RBRK filer proposing to sell on 09/16/2025?

The filer plans to sell 6,805 shares of Class A common stock with an aggregate market value of $514,458.00.

How were the shares acquired that are being sold in this Form 144?

The shares were acquired on 09/15/2025 as restricted stock units (RSUs) that vested under a registered plan; payment type is listed as compensation.

Which broker is handling the proposed sale for RBRK shares?

The proposed sale is to be handled by Morgan Stanley Smith Barney LLC Executive Financial Services in New York.

What insider sales did the filer make in the past three months for RBRK?

The filer sold a total of 27,757 Class A shares between 06/17/2025 and 09/03/2025, for total gross proceeds of $2,425,419.52.

Does the filing state any undisclosed material adverse information about Rubrik (RBRK)?

The signer represents by signature that they do not know of any material adverse information regarding the issuer that has not been publicly disclosed.