RBRK Form 144 Filed—Insider Block of 615,807 Shares via Goldman Sachs

Rhea-AI Filing Summary

Form 144 filed for Rubrik, Inc. (RBRK) reports a proposed sale of 615,807 shares of Class A common stock through Goldman Sachs & Co. LLC on or about 09/11/2025, with an aggregate market value of $47,965,207.23. The issuer has 123,563,326 shares outstanding, making the proposed block roughly 0.5% of outstanding shares. The shares were acquired in 2021 in private transactions from the issuer on three dates: 07/16/2021, 08/02/2021 and 11/29/2021. The filer states there were no issuer securities sold by the account in the past three months and affirms no undisclosed material adverse information.

Positive

• Transparent disclosure of the proposed sale amount, broker, acquisition dates and nature of acquisition
• Filer affirms no undisclosed material adverse information and reports no sales in the past three months
• Securities were acquired from the issuer in private transactions in 2021, indicating long-held status consistent with Rule 144 eligibility

Negative

• Proposed sale value of $47,965,207.23 increases available supply and could exert modest selling pressure
• Planned sale represents a sizable cash value even though it is approximately 0.5% of outstanding shares

Insights

Securities Analyst

TL;DR: Proposed sale equals roughly 0.5% of outstanding shares; routine Rule 144 notice, limited immediate market impact.

The filing notifies the market of a planned sale of 615,807 Class A shares via Goldman Sachs with an indicated aggregate market value of $47,965,207.23 and an approximate sale date of 09/11/2025. The reported acquisition dates in 2021 indicate these are long-held restricted or issued shares eligible for resale under Rule 144. Given the position represents about 0.5% of shares outstanding, this is unlikely to be materially dilutive or immediately price-moving on its own, but it increases available float and could be one datapoint for trading desks monitoring insider/affiliate liquidity.

Corporate Governance Specialist

TL;DR: Filing demonstrates compliance with disclosure rules; provides transparency on insider-origin and planned distribution.

The Form 144 supplies required details: broker name, share count, market value, acquisition origin and dates. The shares were acquired from the issuer in private transactions in 2021, suggesting founder/early-account holdings or restricted grant conversions. The filer also affirms no currently undisclosed material adverse information. From a governance perspective, timely Rule 144 filings are a routine compliance measure and allow investors to track potential insider selling activity.

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	Goldman Sachs & Co. LLC 200 West Street New York NY 10282	615807	47965207.23	123563326	09/11/2025	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	07/16/2021	Acquired from issuer in private transaction	The Issuer			205269	07/16/2021	None
Class A Common	08/02/2021	Acquired from issuer in private transaction	The Issuer			205269	08/02/2021	None
Class A Common	11/29/2021	Acquired from issuer in private transaction	The Issuer			205269	11/29/2021	None

* 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

Nothing to Report

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 does Rubrik's (RBRK) Form 144 disclose?

The filing discloses a proposed sale of 615,807 Class A shares via Goldman Sachs with an aggregate market value of $47,965,207.23, approximate sale date 09/11/2025.

How many Rubrik shares are outstanding according to the filing?

The filing lists 123,563,326 shares outstanding.

When were the shares being sold originally acquired?

The shares were acquired from the issuer in private transactions on 07/16/2021, 08/02/2021, and 11/29/2021.

Who is the broker handling the proposed sale?

The proposed sale is routed through Goldman Sachs & Co. LLC, address listed as 200 West Street, New York, NY 10282.

Were any shares of the issuer sold by this person in the past three months?

According to the filing, there is Nothing to Report for securities sold during the past three months.