Rubrik (NYSE: RBRK) holder files notice to sell 7,000 shares

Rhea-AI Filing Summary

A shareholder of Rubrik, Kiran Kumar Choudary, has filed a notice of proposed sale under Rule 144 for 7,000 shares of common stock. The shares are to be sold on the NYSE through Morgan Stanley Smith Barney LLC, with an approximate sale date of 12/22/2025 and an aggregate market value of $547,260.00. The securities were acquired from the issuer through 3,000 restricted stock units on 04/25/2024 and 4,000 shares via stock option exercise on 12/22/2025, paid in cash. The filing also lists recent Rule 10b5-1 plan sales, including 6,779 shares on 12/17/2025 for $516,452.17 and 3,500 shares on 12/09/2025 for $320,103.00. The signer represents they do not know any undisclosed material adverse information about Rubrik.

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
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	7000	547260.00	151894462	12/22/2025	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 *
Common	04/25/2024	Restricted Stock Units	Issuer			3000	04/25/2024	N/A
Common	12/22/2025	Exercise of Stock Options	Issuer			4000	12/22/2025	Cash

* 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	Common	12/17/2025	6779	516452.17
10b5-1 Sales for KIRAN KUMAR CHOUDARY 3495 DEER CREEK ROAD Palo Alto CA 94304	Common	12/09/2025	3500	320103.00
10b5-1 Sales for KIRAN KUMAR CHOUDARY 3495 DEER CREEK ROAD Palo Alto CA 94304	Common	11/19/2025	3500	243114.60
10b5-1 Sales for KIRAN KUMAR CHOUDARY 3495 DEER CREEK ROAD Palo Alto CA 94304	Common	11/05/2025	3500	253006.60
10b5-1 Sales for KIRAN KUMAR CHOUDARY 3495 DEER CREEK ROAD Palo Alto CA 94304	Common	10/15/2025	3500	279233.00
10b5-1 Sales for KIRAN KUMAR CHOUDARY 3495 DEER CREEK ROAD Palo Alto CA 94304	Common	10/01/2025	3500	289370.80

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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 the Rubrik (RBRK) Rule 144 filing by Kiran Kumar Choudary disclose?

The filing discloses that Kiran Kumar Choudary plans to sell 7,000 shares of Rubrik common stock under Rule 144 through a broker on the NYSE.

How many Rubrik (RBRK) shares are planned to be sold and through which broker?

The notice covers 7,000 shares of Rubrik common stock to be sold through Morgan Stanley Smith Barney LLC on the NYSE with an aggregate market value of $547,260.00.

How did the seller acquire the Rubrik (RBRK) shares listed in this Rule 144 notice?

The seller acquired 3,000 shares via restricted stock units on 04/25/2024 and 4,000 shares through an exercise of stock options on 12/22/2025, with the option exercise paid in cash.

What recent Rubrik (RBRK) stock sales by this holder are disclosed for the past 3 months?

Disclosed sales include 6,779 shares of common stock on 12/17/2025 for $516,452.17 and 3,500 shares on 12/09/2025 for $320,103.00, among other Rule 10b5-1 plan transactions.

What does the Rubrik (RBRK) seller represent about material nonpublic information?

By signing, the seller represents that they do not know any material adverse information about Rubrik’s current or prospective operations that has not been publicly disclosed.

Is a Rule 10b5-1 trading plan referenced in the Rubrik (RBRK) Form 144?

Yes. Several past transactions are labeled as 10b5-1 sales, and the form provides a field for the date of plan adoption or trading instruction if relying on Rule 10b5-1.

How many Rubrik (RBRK) common shares are shown as outstanding in this filing?

The filing lists 151,894,462 shares of Rubrik common stock outstanding in the section describing the securities to be sold.