Large owner Lightspeed Spv I, Llc acquired 1,624,632 shares, converted options into 7,772,062 shares and disposed of 9,075,954 shares (SEC Form 4)

3/27/25 9:00:01 PM ET

$RBRK

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SEC FORM 4 SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Lightspeed SPV I, LLC

(Last)

(First)

(Middle)

2200 SAND HILL ROAD

(Street)

MENLO PARK

94025

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
Rubrik, Inc. [ RBRK ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

Director	X	10% Owner
Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
03/25/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Class A Common Stock	03/25/2025		C		3,330,000	A	$0	3,330,000	D⁽¹⁾
Class A Common Stock	03/25/2025		C		774,000	A	$0	774,000	I	By Lightspeed Venture Partners Select II, L.P.⁽²⁾
Class A Common Stock	03/25/2025		C		1,504,000	A	$0	1,504,000	I	By Lightspeed SPV I, LLC⁽³⁾
Class A Common Stock	03/25/2025		C		1,083,000	A	$0	1,083,000	I	By Lightspeed SPV I-B, LLC⁽⁴⁾
Class A Common Stock	03/25/2025		C		758,000	A	$0	758,000	I	By Lightspeed SPV I-C, LLC⁽⁵⁾
Class A Common Stock	03/25/2025		C		304,978	A	$0	304,978	I	By Lightspeed Venture Partners X, L.P.⁽⁶⁾
Class A Common Stock	03/25/2025		C		18,084	A	$0	18,084	I	By Lightspeed Affiliates X, L.P.⁽⁷⁾
Class A Common Stock	03/25/2025		J⁽⁸⁾		3,330,000	D	$0	0	D⁽¹⁾
Class A Common Stock	03/25/2025		J⁽⁹⁾		869,963	A	$0	869,963	I	By Lightspeed General Partner IX, L.P.⁽¹⁰⁾
Class A Common Stock	03/25/2025		J⁽¹¹⁾		869,963	D	$0	0	I	By Lightspeed General Partner IX, L.P.⁽¹⁰⁾
Class A Common Stock	03/25/2025		J⁽¹²⁾		774,000	D	$0	0	I	By Lightspeed Venture Partners Select II, L.P.⁽²⁾
Class A Common Stock	03/25/2025		J⁽¹³⁾		145,028	A	$0	145,028	I	By Lightspeed General Partner Select II, L.P.⁽¹⁴⁾
Class A Common Stock	03/25/2025		J⁽¹⁵⁾		145,028	D	$0	0	I	By Lightspeed General Partner Select II, L.P.⁽¹⁴⁾
Class A Common Stock	03/25/2025		J⁽¹⁶⁾		1,504,000	D	$0	0	I	By Lightspeed SPV I, LLC⁽³⁾
Class A Common Stock	03/25/2025		J⁽¹⁷⁾		1,083,000	D	$0	0	I	By Lightspeed SPV I-B, LLC⁽⁴⁾
Class A Common Stock	03/25/2025		J⁽¹⁸⁾		758,000	D	$0	0	I	By Lightspeed SPV I-C, LLC⁽⁵⁾
Class A Common Stock	03/25/2025		J⁽¹⁹⁾		224,063	A	$0	224,063	I	By LS SPV Management, LLC⁽²⁰⁾
Class A Common Stock	03/25/2025		J⁽²¹⁾		224,063	D	$0	0	I	By LS SPV Management, LLC⁽²⁰⁾
Class A Common Stock	03/25/2025		J⁽²²⁾		304,978	D	$0	0	I	By Lightspeed Venture Partners X, L.P.⁽⁶⁾
Class A Common Stock	03/25/2025		J⁽²³⁾		64,838	A	$0	64,838	I	By Lightspeed General Partner X, L.P.⁽²⁴⁾
Class A Common Stock	03/25/2025		J⁽²⁵⁾		64,838	D	$0	0	I	By Lightspeed General Partner X, L.P.⁽²⁴⁾
Class A Common Stock	03/25/2025		J⁽²⁶⁾		18,084	D	$0	0	I	By Lightspeed Affiliates X, L.P.⁽⁷⁾
Class A Common Stock	03/25/2025		J⁽²⁷⁾⁽²⁸⁾⁽²⁹⁾		13,213	A	$0	13,213	I	By Lightspeed Management Company, L.L.C.⁽³⁰⁾
Class A Common Stock	03/25/2025		J⁽³¹⁾		21,221	A	$0	21,221	D⁽³²⁾
Class A Common Stock	03/25/2025		J⁽²⁷⁾⁽²⁸⁾⁽²⁹⁾⁽³³⁾		132,543	A	$0	189,279	I	By Eggers Investments LP - Fund 2⁽³⁴⁾
Class A Common Stock	03/25/2025		J⁽³¹⁾		21,221	A	$0	21,221	D⁽³⁵⁾
Class A Common Stock	03/25/2025		J⁽³³⁾		649	A	$0	649	I	By Nieh Family Investments LP - Fund 1⁽³⁶⁾
Class A Common Stock	03/25/2025		J⁽²⁷⁾		110,080	A	$0	250,101	I	By Nieh Family Investments LP - Fund 2⁽³⁷⁾
Class A Common Stock	03/25/2025		J⁽²⁹⁾		8,387	A	$0	8,387	I	By Nieh Family Investments LP - Fund 3⁽³⁸⁾
Class A Common Stock	03/25/2025		J⁽²⁸⁾		13,426	A	$0	30,141	I	By Nieh Family Investments LP - Fund 4⁽³⁹⁾

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Class B Common Stock	⁽⁴⁰⁾	03/25/2025		C			3,330,000	⁽⁴⁰⁾	⁽⁴⁰⁾	Class A Common Stock	3,330,000	$0	9,989,816	D⁽¹⁾
Class B Common Stock	⁽⁴⁰⁾	03/25/2025		C			774,000	⁽⁴⁰⁾	⁽⁴⁰⁾	Class A Common Stock	774,000	$0	2,319,410	I	By Lightspeed Venture Partners Select II, L.P.⁽²⁾
Class B Common Stock	⁽⁴⁰⁾	03/25/2025		C			1,504,000	⁽⁴⁰⁾	⁽⁴⁰⁾	Class A Common Stock	1,504,000	$0	4,511,457	I	By Lightspeed SPV I, LLC⁽³⁾
Class B Common Stock	⁽⁴⁰⁾	03/25/2025		C			1,083,000	⁽⁴⁰⁾	⁽⁴⁰⁾	Class A Common Stock	1,083,000	$0	3,247,511	I	By Lightspeed SPV I-B, LLC⁽⁴⁾
Class B Common Stock	⁽⁴⁰⁾	03/25/2025		C			758,000	⁽⁴⁰⁾	⁽⁴⁰⁾	Class A Common Stock	758,000	$0	2,273,358	I	By Lightspeed SPV I-C, LLC⁽⁵⁾
Class B Common Stock	⁽⁴⁰⁾	03/25/2025		C			304,978	⁽⁴⁰⁾	⁽⁴⁰⁾	Class A Common Stock	304,978	$0	101,659	I	By Lightspeed Venture Partners X, L.P.⁽⁶⁾
Class B Common Stock	⁽⁴⁰⁾	03/25/2025		C			18,084	⁽⁴⁰⁾	⁽⁴⁰⁾	Class A Common Stock	18,084	$0	0	I	By Lightspeed Affiliates X, L.P⁽⁷⁾

1. Name and Address of Reporting Person^*

Lightspeed SPV I, LLC

(Last)

(First)

(Middle)

2200 SAND HILL ROAD

(Street)

MENLO PARK

94025

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Lightspeed SPV I-B, LLC

(Last)

(First)

(Middle)

2200 SAND HILL ROAD

(Street)

MENLO PARK

94025

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Lightspeed SPV I-C, LLC

(Last)

(First)

(Middle)

2200 SAND HILL ROAD

(Street)

MENLO PARK

94025

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

LS SPV Management, LLC

(Last)

(First)

(Middle)

2200 SAND HILL ROAD

(Street)

MENLO PARK

94025

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Eggers Barry

(Last)

(First)

(Middle)

C/O LIGHTSPEED VENTURE PARTNERS

2200 SAND HILL ROAD

(Street)

MENLO PARK

94025

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Nieh Peter

(Last)

(First)

(Middle)

C/O LIGHTSPEED VENTURE PARTNERS

2200 SAND HILL ROAD

(Street)

MENLO PARK

94025

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

Explanation of Responses:

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. 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.

5. 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.

6. 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.

7. 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.

8. Represents an in-kind distribution by Lightspeed IX without consideration to its partners (including LGP IX).

9. Represents receipt of shares in the distribution in kind described in footnote (8).

10. 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.

11. Represents an in-kind distribution by LGP IX without consideration to its partners.

12. Represents an in-kind distribution by Lightspeed Select II without consideration to its partners (including LGP Select II).

13. Represents receipt of shares in the distribution in kind described in footnote (12).

14. 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.

15. Represents an in-kind distribution by LGP Select II without consideration to its partners.

16. Represents an in-kind distribution by Lightspeed SPV I without consideration to its members.

17. Represents an in-kind distribution by Lightspeed SPV I-B without consideration to its members.

18. Represents an in-kind distribution by Lightspeed SPV I-C without consideration to its members.

19. Represents receipt of shares in the distribution in kind described in footnote (16).

20. Shares are held by LS SPV. 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 LS SPV. Each of 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. Represents an in-kind distribution by LS SPV without consideration to its members.

22. Represents an in-kind distribution by Lightspeed X without consideration to its partners (including LGP X).

23. Represents receipt of shares in the distribution in kind described in footnote (22).

24. Shares are held by LGP 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 LGP X. Each of 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.

25. Represents an in-kind distribution by LGP X without consideration to its partners.

26. Represents an in-kind distribution by Lightspeed Affiliates X without consideration to its partners.

27. Represents receipt of shares in the distribution in kind described in footnote (11).

28. Represents receipt of shares in the distribution in kind described in footnote (15).

29. Represents receipt of shares in the distribution in kind described in footnote (25).

30. 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.

31. Represents receipt of shares in the distribution in kind described in footnote (21).

32. Shares are held by Barry Eggers.

33. Represents receipt of shares in the distribution in kind described in footnote (26).

34. Barry Eggers serves as trustee of the general partner of Eggers Investments LP - Fund 2.

35. Shares are held by Peter Nieh.

36. Peter Nieh serves as co-trustee of the general partner of Nieh Family Investments LP - Fund 1.

37. Peter Nieh serves as co-trustee of the general partner of Nieh Family Investments LP - Fund 2.

38. Peter Nieh serves as co-trustee of the general partner of Nieh Family Investments LP - Fund 3.

39. Peter Nieh serves as co-trustee of the general partner of Nieh Family Investments LP - Fund 4.

40. 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.

Remarks:

This Form 4 is the second of two Forms 4 filed relating to the same events. Combined, the two Form 4s report the holdings for the following Reporting Persons: Lightspeed Venture Partners IX, L.P., Lightspeed General Partner IX, L.P., Lightspeed Ultimate General Partner IX, Ltd., Lightspeed SPV I, LLC, Lightspeed SPV I-B, LLC, Lightspeed SPV I-C, LLC, LS SPV Management, LLC, Lightspeed Venture Partners Select II, L.P., Lightspeed General Partner Select II, L.P., Lightspeed Ultimate General Partner Select II, Ltd., Lightspeed Venture Partners X, L.P., Lightspeed Affiliates X, L.P., Lightspeed General Partner X, L.P., Lightspeed Ultimate General Partner X, Ltd., Barry Eggers and Peter Nieh. This Form 4 has been split into two filings because there are more than 10 reporting persons in total, and the SEC's EDGAR filing system limits a single Form 4 to a maximum of 10 reporting persons.

	Lightspeed SPV I, LLC, By: LS SPV Management, LLC, its Manager, By /s/ Ravi Mhatre, Managing Member	03/27/2025
	Lightspeed SPV I-B, LLC, By: LS SPV Management, LLC, its Manager, By /s/ Ravi Mhatre, Managing Member	03/27/2025
	Lightspeed SPV I-C, LLC, By: LS SPV Management, LLC, its Manager, By /s/ Ravi Mhatre, Managing Member	03/27/2025
	LS SPV Management, LLC, By /s/ Ravi Mhatre, Managing Member	03/27/2025
	/s/ Barry Eggers	03/27/2025
	/s/ Peter Nieh	03/27/2025
	** Signature of Reporting Person	Date
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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

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Recent Analyst Ratings for

$RBRK

Date	Price Target	Rating	Analyst
3/13/2026	$105.00 → $70.00	Outperform	BMO Capital Markets
2/24/2026	$65.00	Buy	DA Davidson
12/30/2025	$105.00	Overweight	Stephens
12/5/2025		Mkt Perform → Outperform	William Blair
12/5/2025	$110.00 → $105.00	Outperform	BMO Capital Markets
11/18/2025	$114.00	Buy	Berenberg
11/17/2025		Perform	Oppenheimer
11/17/2025		Neutral → Outperform	Mizuho

More analyst ratings

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1. Title of Security (Instr. 3)

2. Transaction Date (Month/Day/Year)

2A. Deemed Execution Date, if any (Month/Day/Year)

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

Amount

(A) or (D)

Price

Class A Common Stock

03/25/2025

3,330,000

D⁽¹⁾

Class A Common Stock

03/25/2025

774,000

By Lightspeed Venture Partners Select II, L.P.⁽²⁾

Class A Common Stock

03/25/2025

1,504,000

By Lightspeed SPV I, LLC⁽³⁾

Class A Common Stock

03/25/2025

1,083,000

By Lightspeed SPV I-B, LLC⁽⁴⁾

Class A Common Stock

03/25/2025

758,000

By Lightspeed SPV I-C, LLC⁽⁵⁾

Class A Common Stock

03/25/2025

304,978

By Lightspeed Venture Partners X, L.P.⁽⁶⁾

Class A Common Stock

03/25/2025

18,084

By Lightspeed Affiliates X, L.P.⁽⁷⁾

Class A Common Stock

03/25/2025

J⁽⁸⁾

3,330,000

D⁽¹⁾

Class A Common Stock

03/25/2025

J⁽⁹⁾

869,963

By Lightspeed General Partner IX, L.P.⁽¹⁰⁾

Class A Common Stock

03/25/2025

J⁽¹¹⁾

869,963

By Lightspeed General Partner IX, L.P.⁽¹⁰⁾

Class A Common Stock

03/25/2025

J⁽¹²⁾

774,000

By Lightspeed Venture Partners Select II, L.P.⁽²⁾

Class A Common Stock

03/25/2025

J⁽¹³⁾

145,028

By Lightspeed General Partner Select II, L.P.⁽¹⁴⁾

Class A Common Stock

03/25/2025

J⁽¹⁵⁾

145,028

By Lightspeed General Partner Select II, L.P.⁽¹⁴⁾

Class A Common Stock

03/25/2025

J⁽¹⁶⁾

1,504,000

By Lightspeed SPV I, LLC⁽³⁾

Class A Common Stock

03/25/2025

J⁽¹⁷⁾

1,083,000

By Lightspeed SPV I-B, LLC⁽⁴⁾

Class A Common Stock

03/25/2025

J⁽¹⁸⁾

758,000

By Lightspeed SPV I-C, LLC⁽⁵⁾

Class A Common Stock

03/25/2025

J⁽¹⁹⁾

224,063

By LS SPV Management, LLC⁽²⁰⁾

Class A Common Stock

03/25/2025

J⁽²¹⁾

224,063

By LS SPV Management, LLC⁽²⁰⁾

Class A Common Stock

03/25/2025

J⁽²²⁾

304,978

By Lightspeed Venture Partners X, L.P.⁽⁶⁾

Class A Common Stock

03/25/2025

J⁽²³⁾

64,838

By Lightspeed General Partner X, L.P.⁽²⁴⁾

Class A Common Stock

03/25/2025

J⁽²⁵⁾

64,838

By Lightspeed General Partner X, L.P.⁽²⁴⁾

Class A Common Stock

03/25/2025

J⁽²⁶⁾

18,084

By Lightspeed Affiliates X, L.P.⁽⁷⁾

Class A Common Stock

03/25/2025

J⁽²⁷⁾⁽²⁸⁾⁽²⁹⁾

13,213

By Lightspeed Management Company, L.L.C.⁽³⁰⁾

Class A Common Stock

03/25/2025

J⁽³¹⁾

21,221

D⁽³²⁾

Class A Common Stock

03/25/2025

J⁽²⁷⁾⁽²⁸⁾⁽²⁹⁾⁽³³⁾

132,543

189,279

By Eggers Investments LP - Fund 2⁽³⁴⁾

Class A Common Stock

03/25/2025

J⁽³¹⁾

21,221

D⁽³⁵⁾

Class A Common Stock

03/25/2025

J⁽³³⁾

649

By Nieh Family Investments LP - Fund 1⁽³⁶⁾

Class A Common Stock

03/25/2025

J⁽²⁷⁾

110,080

250,101

By Nieh Family Investments LP - Fund 2⁽³⁷⁾

Class A Common Stock

03/25/2025

J⁽²⁹⁾

8,387

By Nieh Family Investments LP - Fund 3⁽³⁸⁾

Class A Common Stock

03/25/2025

J⁽²⁸⁾

13,426

30,141

By Nieh Family Investments LP - Fund 4⁽³⁹⁾

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 (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

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 (Month/Day/Year)

7. Title and Amount of Securities Underlying Derivative Security (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: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Class B Common Stock

⁽⁴⁰⁾

03/25/2025

3,330,000

⁽⁴⁰⁾

Class A Common Stock

3,330,000

9,989,816

D⁽¹⁾

Class B Common Stock

⁽⁴⁰⁾

03/25/2025

774,000

⁽⁴⁰⁾

Class A Common Stock

774,000

2,319,410

By Lightspeed Venture Partners Select II, L.P.⁽²⁾

Class B Common Stock

⁽⁴⁰⁾

03/25/2025

1,504,000

⁽⁴⁰⁾

Class A Common Stock

1,504,000

4,511,457

By Lightspeed SPV I, LLC⁽³⁾

Class B Common Stock

⁽⁴⁰⁾

03/25/2025

1,083,000

⁽⁴⁰⁾

Class A Common Stock

1,083,000

3,247,511

By Lightspeed SPV I-B, LLC⁽⁴⁾

Class B Common Stock

⁽⁴⁰⁾

03/25/2025

758,000

⁽⁴⁰⁾

Class A Common Stock

758,000

2,273,358

By Lightspeed SPV I-C, LLC⁽⁵⁾

Class B Common Stock

⁽⁴⁰⁾

03/25/2025

304,978

⁽⁴⁰⁾

Class A Common Stock

304,978

101,659

By Lightspeed Venture Partners X, L.P.⁽⁶⁾

Class B Common Stock

⁽⁴⁰⁾

03/25/2025

18,084

⁽⁴⁰⁾

Class A Common Stock

18,084

By Lightspeed Affiliates X, L.P⁽⁷⁾

Recent Analyst Ratings for

$RBRK

Date	Price Target	Rating	Analyst
3/13/2026	$105.00 → $70.00	Outperform	BMO Capital Markets
2/24/2026	$65.00	Buy	DA Davidson
12/30/2025	$105.00	Overweight	Stephens
12/5/2025		Mkt Perform → Outperform	William Blair
12/5/2025	$110.00 → $105.00	Outperform	BMO Capital Markets
11/18/2025	$114.00	Buy	Berenberg
11/17/2025		Perform	Oppenheimer
11/17/2025		Neutral → Outperform	Mizuho

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$RBRK Analyst Ratings

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