Sec Form 4 Filing - Chandna Asheem @ Rubrik, Inc. - 2025-03-28

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Chandna Asheem 2. Issuer Name and Ticker or Trading Symbol Rubrik, Inc. [ RBRK] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O GREYLOCK PARTNERS, 2550 SAND HILL ROAD, SUITE 200 3. Date of Earliest Transaction (MM/DD/YY) 03/28/2025 (Street) MENLO PARK, CA94025 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A Common Stock 03/28/2025 J( 1 ) 4,476,447 D $ 0 2,238,224 I By Greylock XIV Limited Partnership ( 2 ) Class A Common Stock 03/28/2025 J( 1 ) 248,691 D $ 0 124,346 I By Greylock XIV-A Limited Partnersip ( 3 ) Class A Common Stock 03/28/2025 J( 1 ) 248,691 D $ 0 124,346 I By Greylock XIV Principals LLC ( 4 ) Class A Common Stock 03/28/2025 J( 5 ) 283,943 A $ 0 564,514 D Class A Common Stock 03/28/2025 J( 6 ) 2,324 A $ 0 4,648 I By Asheem Chandna and Aarti Chandna, trustees of the Chandna Children's Trust dated 12/23/2012 Class A Common Stock 03/28/2025 J( 7 ) 11,621 A $ 0 23,242 I By The Revocable Trust of Asheem Chandna and Aarti Chandna, UDT 4/13/98

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Chandna Asheem C/O GREYLOCK PARTNERS 2550 SAND HILL ROAD, SUITE 200 MENLO PARK, CA94025 X X Signatures /s/ Larry Guo, Attorney-in-Fact 04/01/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents a pro-rata, in-kind distribution by the Reporting Person and its affiliated funds and associated persons, without additional consideration, to its respective partners, members and/or assigns. Such distribution was made in accordance with the exemption afforded by Rules 16a-13 and 16a-9 of the Securities Exchange Act of 1934, as amended. ( 2 )The shares are held of record by Greylock XIV Limited Partnership, or Greylock XIV LP. Greylock XIV GP LLC, or Greylock XIV GP, is the general partner of Greylock XIV LP. Greylock XIV GP may be deemed to share voting and dispositive power with regard to the shares held directly by Greylock XIV LP and may be deemed to have indirect beneficial ownership of an indeterminate number of such shares. The Reporting Person is one of the managing members of Greylock XIV GP, and may be deemed to share voting and investment power over the shares held by Greylock XIV LP. The Reporting Person disclaims beneficial ownership of these shares and this report shall not be deemed an admission that he is the beneficial owner of such shares, except to the extent of his pecuniary interest, if any. ( 3 )The shares are held of record by Greylock XIV-A Limited Partnership, or Greylock XIV-A LP. Greylock XIV GP is the general partner of Greylock XIV-A LP. Greylock XIV GP may be deemed to share voting and dispositive power with regard to the shares held directly by Greylock XIV-A LP and may be deemed to have indirect beneficial ownership of an indeterminate number of such shares. The Reporting Person is one of the managing members of Greylock XIV GP, and may be deemed to share voting and investment power over the shares held by Greylock XIV-A LP. The Reporting Person disclaims beneficial ownership of these shares and this report shall not be deemed an admission that he is the beneficial owner of such shares, except to the extent of his pecuniary interest, if any. ( 4 )The shares are held of record by Greylock XIV Principals LLC, or Greylock XIV Principals. Greylock XIV GP is the manager of Greylock XIV Principals. Greylock XIV GP may be deemed to share voting and dispositive power with regard to the shares held directly by Greylock XIV Principals and may be deemed to have indirect beneficial ownership of an indeterminate number of such shares. The Reporting Person is one of the managing members of Greylock XIV GP, and may be deemed to share voting and investment power over the shares held by Greylock XIV Principals. The Reporting Person disclaims beneficial ownership of these shares and this report shall not be deemed an admission that he is the beneficial owner of such shares, except to the extent of his pecuniary interest, if any. ( 5 )Represents (i) 268,999 shares of Class A Common Stock acquired by the Reporting Person in a distribution by Greylock XIV Limited Partnership for no consideration and (ii) 14,944 shares of Class A Common Stock acquired by the Reporting Person in a distribution by Greylock XIV-A Limited Partnership for no consideration. All of the aforementioned distributions were made in accordance with the exemptions afforded by Rules 16a-9 and 16a-13 of the Securities Exchange Act of 1934, as amended. ( 6 )Represents 2,324 shares of Class A Common Stock acquired by the Reporting Person in a distribution by Greylock XIV Principals, LLC for no consideration in accordance with the exemptions afforded by Rules 16a-9 and 16a-13 of the Securities Exchange Act of 1934, as amended. ( 7 )Represents 11,621 shares of Class A Common Stock acquired by the Reporting Person in a distribution by Greylock XIV Principals, LLC for no consideration in accordance with the exemptions afforded by Rules 16a-9 and 16a-13 of the Securities Exchange Act of 1934, as amended.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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