Statement of Changes in Beneficial Ownership - Form 4

Ownership Submission

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. 20549STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Lightspeed Venture Partners IX, L.P. 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 _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 2200 SAND HILL ROAD , 3. Date of Earliest Transaction (Month/Day/Year) (Street) MENLO PARK CA 94025 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Join/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ 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 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code 4. Securities Acquired (A) or Disposed of (D) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) 6. Ownership Form: Direct (D) or Indirect (I) 7. Nature of Indirect Beneficial Ownership Code V Amount (A) or (D) Price

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivate Security	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code	5. Number of Derivative Securities Acquired (A) or Disposed of (D)	6. Date Exercisable and Expiration Date	7. Title and Amount of Securities Underlying Derivative Security	8. Price of Derivative Security	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)	11. Nature of Indirect Beneficial Ownership
Code	V	(A)	(D)	Date Exercisable	Expriation Date	Title	Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
Director	10% Owner	Officer	Other
Lightspeed Venture Partners IX, L.P. 2200 SAND HILL ROAD MENLO PARK, CA94025
Lightspeed General Partner IX, L.P. 2200 SAND HILL ROAD MENLO PARK, CA94025		X
Lightspeed Ultimate General Partner IX, Ltd. 2200 SAND HILL ROAD MENLO PARK, CA94025		X
Lightspeed Venture Partners Select II, L.P. 2200 SAND HILL ROAD MENLO PARK, CA94025		X
Lightspeed General Partner Select II, L.P. 2200 SAND HILL ROAD MENLO PARK, CA94025		X
Lightspeed Ultimate General Partner Select II, Ltd. 2200 SAND HILL ROAD MENLO PARK, CA94025		X
Lightspeed SPV I, LLC 2200 SAND HILL ROAD MENLO PARK, CA94025		X
LS SPV Management, LLC 2200 SAND HILL ROAD MENLO PARK, CA94025		X
Eggers Barry C/O LIGHTSPEED VENTURE PARTNERS 2200 SAND HILL ROAD MENLO PARK, CA94025		X
Nieh Peter C/O LIGHTSPEED VENTURE PARTNERS 2200 SAND HILL ROAD MENLO PARK, CA94025		X

Signatures

Lightspeed Venture Partners IX, L.P., By: Lightspeed General Partner IX, L.P., its General Partner, By: Lightspeed Ultimate General Partner IX, Ltd., its General Partner, By /s/ Ravi Mhatre, Director	2024-09-12
**Signature of Reporting Person	Date
Lightspeed General Partner IX, L.P., By: Lightspeed Ultimate General Partner IX, Ltd., its General Partner, By /s/ Ravi Mhatre, Director	2024-09-12
**Signature of Reporting Person	Date
Lightspeed Ultimate General Partner IX, Ltd., By /s/ Ravi Mhatre, Director	2024-09-12
**Signature of Reporting Person	Date
Lightspeed Venture Partners Select II, L.P., By: Lightspeed General Partner Select II, L.P., its General Partner, By: Lightspeed Ultimate General Partner Select II, Ltd., its General Partner, By /s/ Ravi Mhatre, Director	2024-09-12
**Signature of Reporting Person	Date
Lightspeed General Partner Select II, L.P., By: Lightspeed Ultimate General Partner Select II, Ltd., its General Partner, By /s/ Ravi Mhatre, Director	2024-09-12
**Signature of Reporting Person	Date
Lightspeed Ultimate General Partner Select II, Ltd., By /s/ Ravi Mhatre, Director	2024-09-12
**Signature of Reporting Person	Date
Lightspeed SPV I, LLC, By: LS SPV Management, LLC, its Manager, By /s/ Ravi Mhatre, Managing Member	2024-09-12
**Signature of Reporting Person	Date
LS SPV Management, LLC, By /s/ Ravi Mhatre, Managing Member	2024-09-12
**Signature of Reporting Person	Date
/s/ Barry Eggers	2024-09-12
**Signature of Reporting Person	Date
/s/ Peter Nieh	2024-09-12
**Signature of Reporting Person	Date

Explanation of Responses:

(*)	If the form is filed by more than one reporting person, see Instruction 5(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).
(1)	Shares are held by Lightspeed Venture Partners IX, L.P. ("Lightspeed IX"). Lightspeed General Partner IX, L.P. ("LGP IX") is the general partner of Lightspeed IX. Lightspeed Ultimate General Partner IX, Ltd. ("LUGP IX") is the general partner of LGP IX. Barry Eggers, Ravi Mhatre and Peter Nieh are the directors of LUGP IX and share voting and dispositive power with respect to the shares held by Lightspeed IX. Each of LGP IX, LUGP IX and Messrs. Eggers and Nieh disclaims beneficial ownership of these shares except to the extent of its or his respective pecuniary interest therein. Mr. Mhatre is a director of the Issuer and files separate Section 16 reports.
(2)	Shares are held by Lightspeed Venture Partners Select II, L.P. ("Lightspeed Select II"). Lightspeed General Partner Select II, L.P. ("LGP Select II") is the general partner of Lightspeed Select II. Lightspeed Ultimate General Partner Select II, Ltd. ("LUGP Select II") is the general partner of LGP Select II. Barry Eggers, Ravi Mhatre and Peter Nieh are the directors of LUGP Select II and share voting and dispositive power with respect to the shares held by Lightspeed Select II. Each of LGP Select II, LUGP Select II and Messrs. Eggers and Nieh disclaims beneficial ownership of these shares except to the extent of its or his respective pecuniary interest therein. Mr. Mhatre is a director of the Issuer and files separate Section 16 reports.
(3)	Shares are held by Lightspeed SPV I, LLC ("Lightspeed SPV I"). LS SPV Management, LLC ("LS SPV") is the manager of Lightspeed SPV I. Barry Eggers, Ravi Mhatre and Peter Nieh are the managing members of LS SPV and share voting and dispositive power with respect to the shares held by Lightspeed SPV I. Each of LS SPV and Messrs. Eggers and Nieh disclaims beneficial ownership of these shares except to the extent of its or his respective pecuniary interest therein. Mr. Mhatre is a director of the Issuer and files separate Section 16 reports.
(4)	Represents an in-kind distribution by Lightspeed IX without consideration to its partners (including LGP IX).
(5)	Represents an in-kind distribution by Lightspeed Select II without consideration to its partners (including LGP Select II).
(6)	Represents an in-kind distribution by Lightspeed SPV I without consideration to its members.
(7)	Represents receipt of shares in the distribution in kind described in footnote (4).
(8)	Shares are held by LGP IX. LUGP IX is the general partner of LGP IX. Barry Eggers, Ravi Mhatre and Peter Nieh are the directors of LUGP IX and share voting and dispositive power with respect to the shares held by LGP IX. Each of LUGP IX and Messrs. Eggers and Nieh disclaims beneficial ownership of these shares except to the extent of its or his respective pecuniary interest therein. Mr. Mhatre is a director of the Issuer and files separate Section 16 reports.
(9)	Represents an in-kind distribution by LGP IX without consideration to its partners.
(10)	Represents receipt of shares in the distribution in kind described in footnote (5).
(11)	Shares are held by LGP Select II. LUGP Select II is the general partner of LGP Select II. Barry Eggers, Ravi Mhatre and Peter Nieh are the directors of LUGP Select II and share voting and dispositive power with respect to the shares held by LGP Select II. Each of LUGP Select II and Messrs. Eggers and Nieh disclaims beneficial ownership of these shares except to the extent of its or his respective pecuniary interest therein. Mr. Mhatre is a director of the Issuer and files separate Section 16 reports.
(12)	Represents an in-kind distribution by LGP Select II without consideration to its partners.
(13)	Represents receipt of shares in the distribution in kind described in footnote (9).
(14)	Represents receipt of shares in the distribution in kind described in footnote (12).
(15)	Shares are held by Lightspeed Management Company, L.L.C. ("LMC"). Barry Eggers, Ravi Mhatre, and Peter Nieh are the managing members of LMC and share voting and dispositive power with respect to the shares held by LMC. Each of Messrs. Eggers and Nieh disclaims beneficial ownership of these shares except to the extent of his respective pecuniary interest therein. Mr. Mhatre is a director of the Issuer and files separate Section 16 reports.
(16)	Barry Eggers serves as trustee of the general partner of Eggers Investments LP - Fund 2.
(17)	Peter Nieh serves as co-trustee of the general partner of Nieh Family Investments LP - Fund 2.
(18)	Peter Nieh serves as co-trustee of the general partner of Nieh Family Investments LP - Fund 4.
(19)	Each share of Class B Common Stock 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 is also convertible at any time at the option of the holder into one share of Class A Common Stock.
(20)	Shares are held by Lightspeed SPV I-B, LLC ("Lightspeed SPV I-B"). LS SPV is the manager of Lightspeed SPV I-B. Barry Eggers, Ravi Mhatre, and Peter Nieh are the managing members of LS SPV and share voting and dispositive power with respect to the shares held by Lightspeed SPV I-B. Each of LS SPV and Messrs. Eggers and Nieh disclaims beneficial ownership of these shares except to the extent of its or his respective pecuniary interest therein. Mr. Mhatre is a director of the Issuer and files separate Section 16 reports.
(21)	Shares are held by Lightspeed SPV I-C, LLC ("Lightspeed SPV I-C"). LS SPV is the manager of Lightspeed SPV I-C. Barry Eggers, Ravi Mhatre, and Peter Nieh are the managing members of LS SPV and share voting and dispositive power with respect to the shares held by Lightspeed SPV I-C. Each of LS SPV and Messrs. Eggers and Nieh disclaims beneficial ownership of these shares except to the extent of its or his respective pecuniary interest therein. Mr. Mhatre is a director of the Issuer and files separate Section 16 reports.
(22)	Shares are held by Lightspeed Venture Partners X, L.P. ("Lightspeed X"). Lightspeed General Partner X, L.P. ("LGP X") is the general partner of Lightspeed X. Lightspeed Ultimate General Partner X, Ltd. ("LUGP X") is the general partner of LGP X. Barry Eggers, Ravi Mhatre, and Peter Nieh are the directors of LUGP X and share voting and dispositive power with respect to the shares held by Lightspeed X. Each of LGP X, LUGP X and Messrs. Eggers and Nieh disclaims beneficial ownership of these shares except to the extent of its or his respective pecuniary interest therein. Mr. Mhatre is a director of the Issuer and files separate Section 16 reports.
(23)	Shares are held by Lightspeed Affiliates X, L.P. ("Lightspeed Affiliates X"). LGP X, is the general partner of Lightspeed Affiliates X. LUGP X is the general partner of LGP X. Barry Eggers, Ravi Mhatre, and Peter Nieh are the directors of LUGP X and share voting and dispositive power with respect to the shares held by Lightspeed Affiliates X. Each of LGP X, LUGP X and Messrs. Eggers and Nieh disclaims beneficial ownership of these shares except to the extent of its or his respective pecuniary interest therein. Mr. Mhatre is a director of the Issuer and files separate Section 16 reports.

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