SCHEDULE 13D

CUSIP No.

781154109

Name of reporting person

Bipul Sinha

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 13,791,466.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 13,791,466.00
10	Shared Dispositive Power 0.00

Aggregate amount beneficially owned by each reporting person

13,791,466.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

8.9 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

Item 1.

Security and Issuer

(a)

Title of Class of Securities:

Class A Common Stock

(b)

Name of Issuer:

RUBRIK, INC.

(c)

Address of Issuer's Principal Executive Offices:

3495 Deer Creek Road, Palo Alto, CALIFORNIA , 94304.

Item 1 Comment:

This Amendment No. 1 ("Amendment No. 1") to Schedule 13D relates to the shares of Class A common stock, $0.00001 par value per share (the "Class A Common Stock"), of Rubrik, Inc., a Delaware corporation (the "Issuer"), and amends and supplements the initial statement on Schedule 13D filed by Bipul Sinha (the "Reporting Person") with the Securities and Exchange Commission on April 1, 2025, Unless otherwise defined herein, capitalized terms used in this Amendment No. 1 shall have the meanings ascribed to them in the Schedule 13D. Unless amended or supplemented below, the information in the Schedule 13D remains unchanged.

Item 5.

Interest in Securities of the Issuer

(a)

Rows 11 and 13 of the Reporting Person's cover page to this Schedule 13D set forth the aggregate number of shares of Class A Common Stock and percentages of the shares of Class A Common Stock beneficially owned by the Reporting Person and are incorporated herein by referenced. The percentage set forth in row 13 is based upon 142,085,609 shares of the Issuer's Class A Common Stock outstanding as of August 31, 2025, as reported in the Issuer's Form 10-Q filed the SEC on September 10, 2025. The Reporting Person's ownership of the Issuer's securities includes 2,499,975 shares issuable within 60 days of the date of this report, upon the exercise of stock options held by the Reporting Person.

(b)

Rows 7 through 10 of the Reporting Person's cover page to this Schedule 13D set forth the number of shares of Class A Common Stock as to which such Reporting Person has the sole or shared power to vote or direct the vote and sole or shared power to dispose or to direct the disposition and are incorporated by reference.

(c)

Except as set forth below, the Reporting Person has not effected any transactions in the Class A Common Stock during the past sixty days: Sale of Class A Common Stock: On September 12, 2025, the Reporting Person sold 615,807 shares of the Issuer's Class A Common Stock. Gift of Shares: On September 12, 2025, the Reporting Person gifted 150,000 shares of the Issuer's Class A Common Stock.

(d)

Not applicable.

(e)

Not applicable.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Bipul Sinha

Signature:	/s/ Bipul Sinha
Name/Title:	Bipul Sinha
Date:	09/12/2025