RBRK Insider Notice: 4,814 RSUs to Be Sold; Recent Sales Total 54,782 Shares

Rhea-AI Filing Summary

Rubrik, Inc. insider notice to sell 4,814 shares of Class A common stock through Morgan Stanley Smith Barney, with an aggregate market value of $363,938.40. The shares represent restricted stock units that vested on 09/15/2025 and were acquired as compensation. The filing lists the issuer's outstanding Class A shares as 142,085,609 and names the NYSE as the exchange for an approximate sale date of 09/16/2025. The notice also discloses four prior sales by the same person in the past three months totaling 54,782 shares for aggregate gross proceeds of $4,761,912.89. The filer attests there is no undisclosed material adverse information.

Positive

• Disclosure is complete: includes acquisition date, nature of acquisition (RSU vesting), broker, and recent sales history
• Shares acquired as compensation: 4,814 RSUs vested on 09/15/2025, indicating a routine compensation event
• Brokered sale on NYSE: sale routed through Morgan Stanley Smith Barney LLC, a regulated intermediary

Negative

• Significant insider selling in recent months: 54,782 shares sold in the past three months for aggregate gross proceeds of $4,761,912.89
• Potential perception risk: repeated sales by the same person could be viewed negatively by some investors despite being disclosed as compensation

Insights

Securities Analyst

TL;DR: Routine insider sale of vested RSUs; transaction disclosure is standard and appears non-material to company fundamentals.

The filing documents a planned sale of 4,814 Class A shares from vested restricted stock units, executed through a broker on the NYSE. Prior sales in the last three months total 54,782 shares for $4.76 million, indicating incremental liquidity taken by the reporting person rather than a single large disposition. No new financial results, governance changes, or company-specific adverse disclosures are included; the filer affirms no material non-public information. Impact on share count is negligible versus the 142 million outstanding shares.

Corporate Governance Expert

TL;DR: Disclosure aligns with Rule 144 requirements; the filing documents compensation-related vesting and prior sales, reflecting standard insider reporting.

The securities were acquired as compensation when RSUs vested on 09/15/2025 and are being sold through a registered broker. The notice includes required attestations about material information and lists recent dispositions by the same individual. From a governance and compliance perspective, the form contains the expected elements: acquisition date, nature of acquisition, broker details, and historical sales. There is no indication in the filing of unusual timing or undisclosed issues.

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	4814	363938.40	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			4814	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
Brian K McCarthy 3495 Deer Creek Road Palo Alto CA 94304	Class A Common Stock	06/17/2025	4782	423507.79
Brian K McCarthy 3495 Deer Creek Road Palo Alto CA 94304	Class A Common Stock	07/01/2025	25000	2149294.00
Brian K. McCarthy 3495 Deer Creek Road Palo Alto CA 94304	Class A Common Stock	08/01/2025	12500	1091102.60
Brian K McCarthy 3495 Deer Creek Road Palo Alto CA 94304	Class A Common Stock	09/02/2025	12500	1098008.50

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 is the size and value of the proposed sale in the RBRK Form 144?

The notice proposes selling 4,814 Class A shares with an aggregate market value of $363,938.40.

How were the shares acquired that are proposed for sale under this RBRK filing?

The shares were acquired on 09/15/2025 as restricted stock units vesting under a registered plan and were paid as compensation.

Through which broker will the RBRK shares be sold and on what exchange?

The sale is to be handled by Morgan Stanley Smith Barney LLC and listed for sale on the NYSE.

What recent insider sales by the same person are disclosed in the filing?

Four sales in the past three months totaling 54,782 shares on 06/17/2025, 07/01/2025, 08/01/2025, and 09/02/2025 for aggregate gross proceeds of $4,761,912.89.

How many Class A shares does Rubrik, Inc. have outstanding according to the filing?

The filing reports 142,085,609 Class A shares outstanding.