[144] Rubrik, Inc. SEC Filing

Rhea-AI Filing Summary

A shareholder has filed a Form 144 notice to sell up to 60,000 shares of common stock. The shares are expected to be sold around 01/16/2026 through Morgan Stanley Smith Barney LLC on the NYSE, with an aggregate market value of 4,143,000.00. The issuer has 151,894,462 shares of common stock outstanding.

The 60,000 shares consist of 15,000 shares acquired on 01/16/2026 by exercising stock options for cash and 45,000 shares from restricted stock units acquired on 04/25/2024. The filing also lists recent sales over the past three months by or for Kiran Choudary, including several Rule 10b5-1 plan trades such as 3,500-share sales on multiple dates and a 6,779-share sale on 12/17/2025 with gross proceeds of 516,452.17.

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	60000	4143000.00	151894462	01/16/2026	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 *
Common	01/16/2026	Exercise of Stock Options	Issuer			15000	01/16/2026	Cash
Common	04/25/2024	Restricted Stock Units	Issuer			45000	04/25/2024	N/A

* 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
10b5-1 Sales for KIRAN CHOUDARY 3495 DEER CREEK ROAD Palo Alto CA 94304	Common	01/07/2026	3500	266719.60
10b5-1 Sales for KIRAN CHOUDARY 3495 DEER CREEK ROAD Palo Alto CA 94304	Common	12/22/2025	3500	277377.95
KIRAN CHOUDARY 3495 DEER CREEK ROAD Palo Alto CA 94304	Common	12/17/2025	6779	516452.17
10b5-1 Sales for KIRAN CHOUDARY 3495 DEER CREEK ROAD Palo Alto CA 94304	Common	12/09/2025	3500	320103.00
10b5-1 Sales for KIRAN CHOUDARY 3495 DEER CREEK ROAD Palo Alto CA 94304	Common	11/19/2025	3500	243114.60
10b5-1 Sales for KIRAN CHOUDARY 3495 DEER CREEK ROAD Palo Alto CA 94304	Common	11/05/2025	3500	253006.60

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 this Form 144 filing related to RBRK disclose?

The filing gives notice of a planned sale of 60,000 shares of common stock, with an aggregate market value of 4,143,000.00, to be sold around 01/16/2026 through Morgan Stanley Smith Barney LLC on the NYSE.

How were the 60,000 RBRK shares in the Form 144 acquired?

The notice states that 15,000 shares were acquired on 01/16/2026 via an exercise of stock options paid in cash, and 45,000 shares were acquired as restricted stock units on 04/25/2024.

How many RBRK shares are outstanding according to this Form 144?

The filing reports that there are 151,894,462 shares of the issuer’s common stock outstanding, providing context for the size of the planned 60,000-share sale.

Who is associated with the recent RBRK share sales listed in the Form 144?

The recent three-month sales disclosed are by or for Kiran Choudary, including several Rule 10b5-1 plan trades and a direct sale, all in the issuer’s common stock.

What recent RBRK stock sales are detailed over the past three months?

The filing lists multiple common stock sales, including 3,500-share Rule 10b5-1 trades on 11/05/2025, 11/19/2025, 12/09/2025, 12/22/2025, and 01/07/2026, plus a 6,779-share sale on 12/17/2025 with gross proceeds of 516,452.17.

What representation does the seller make in this Form 144 for RBRK?

By signing, the person for whose account the shares are to be sold represents that they do not know any material adverse information about the issuer’s current or prospective operations that has not been publicly disclosed.