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Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Checkbox not checked   Rule 13d-1(b)
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SCHEDULE 13D/A 0001415889-25-009469 0001685768 XXXXXXXX LIVE 1 Class A Common Stock 09/12/2025 true 0001943896 781154109 RUBRIK, INC. 3495 Deer Creek Road Palo Alto CA 94304 Anne-Kathrin Lalendran 884-478-2745 c/o Rubrik Inc. 3495 Deer Creek Road Palo Alto CA 94304 0001685768 N Bipul Sinha PF N X1 13791466.00 0.00 13791466.00 0.00 13791466.00 N 8.9 IN Class A Common Stock RUBRIK, INC. 3495 Deer Creek Road Palo Alto CA 94304 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. 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. 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. 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. Not applicable. Not applicable. Bipul Sinha /s/ Bipul Sinha Bipul Sinha 09/12/2025