Sec Form 4 Filing - Choudary Kiran Kumar @ Rubrik, Inc. - 2024-10-14

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 Choudary Kiran Kumar 2. Issuer Name and Ticker or Trading Symbol Rubrik, Inc. [ RBRK] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Financial Officer (Last) (First) (Middle) C/O RUBRIK INC., 3495 DEER CREEK ROAD 3. Date of Earliest Transaction (MM/DD/YY) 10/14/2024 (Street) PALO ALTO, CA94304 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 10/14/2024 C 1,000 A $ 0 494,360 D Class A Common Stock 10/14/2024 S( 1 ) 45,800 D $ 39.22 ( 2 ) 448,560 D Class A Common Stock 10/15/2024 S( 1 ) 2,417 D $ 40 446,143 D

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 Stock Option (right to buy) $ 7.99 10/14/2024 M 1,000 ( 3 ) 09/17/2028 Class B Common Stock 1,000 $ 0 97,450 D Class B Common Stock ( 4 ) 10/14/2024 M 1,000 ( 4 ) ( 4 ) Class A Common Stock 1,000 ( 4 ) 1,000 D Class B Common Stock ( 4 ) 10/14/2024 C 1,000 ( 4 ) ( 4 ) Class A Common Stock 1,000 ( 4 ) 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Choudary Kiran Kumar C/O RUBRIK INC. 3495 DEER CREEK ROAD PALO ALTO, CA94304 Chief Financial Officer Signatures /s/ Larry Guo, Attorney-in-Fact 10/16/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )This sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan, adopted July 15, 2024 ( 2 )The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $38.96 to $39.69 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote. ( 3 )1/4 of the shares subject to the option vested on August 20, 2019, and 1/48 of the shares vested monthly thereafter. ( 4 )Each share of Class B Common Stock held by the Reporting Person will automatically convert into one share of Class A Common Stock upon the sale or transfer of such share of Class B Common Stock, subject to certain exceptions, and in certain other circumstances described in the Issuer's amended and restated certificate of incorporation. Each share of Class B Common Stock will also be convertible at any time at the option of the Reporting Person into one share of Class A Common Stock.

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).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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