[Form 4] Rubrik, Inc. Insider Trading Activity

Nithrakashyap Arvind reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Nithrakashyap Arvind reported acquisition or exercise transactions in this Form 4 filing.

Rubrik, Inc. Chief Technology Officer Nithrakashyap Arvind received an equity grant of 92,834 shares of Class A Common Stock as a restricted stock unit award. The award was received at a stated price of $0.00 per share as part of compensation, increasing his direct holdings to 441,502 shares.

The RSUs vest over time: 2.5% of the units vest on each of the first four Quarterly Vesting Dates after March 15, 2026, and the remaining units vest in twelve equal installments on subsequent Quarterly Vesting Dates, subject to his Continuous Service under the 2024 Equity Incentive Plan.

Insider Trade Summary

Grant/Award: 92,834 shares

Grant/Award 1 txn

Insider Nithrakashyap Arvind

Role Chief Technology Officer

Type	Security	Shares	Price	Value
Grant/Award	Class A Common Stock	92,834	$0.00	$0.00

Holdings After Transaction: Class A Common Stock — 441,502 shares (Direct)

Footnotes (1)

1. F1. Represents the grant of restricted stock units ("RSUs") that vest as follows: 2.5% of the RSUs shall vest on each of the first four Quarterly Vesting Dates (as defined below) that occur following March 15, 2026, and the remainder shall vest in twelve equal installments on each subsequent Quarterly Vesting Date thereafter, in each case subject to the Reporting Person's Continuous Service (as defined in the 2024 Equity Incentive Plan) through each applicable vesting date. "Quarterly Vesting Date" shall mean the 15th of each of March, June, September and December.

Key Figures

RSU grant size: 92,834 shares Grant price per share: $0.00 per share Post-transaction holdings: 441,502 shares +2 more

5 metrics

RSU grant size 92,834 shares Restricted stock units of Class A Common Stock granted to CTO

Grant price per share $0.00 per share Stated price for the RSU award

Post-transaction holdings 441,502 shares Total Class A Common Stock directly held after the grant

Initial vesting rate 2.5% per Quarterly Vesting Date Applies to each of the first four Quarterly Vesting Dates after March 15, 2026

Remaining vesting installments 12 installments Remaining RSUs vest in twelve equal Quarterly Vesting Date installments

Key Terms

restricted stock units ("RSUs"), Continuous Service, 2024 Equity Incentive Plan, Quarterly Vesting Date

4 terms

restricted stock units ("RSUs") financial

"Represents the grant of restricted stock units ("RSUs") that vest as follows"

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

Continuous Service financial

"subject to the Reporting Person's Continuous Service (as defined in the 2024 Equity Incentive Plan)"

2024 Equity Incentive Plan financial

"Continuous Service (as defined in the 2024 Equity Incentive Plan) through each applicable vesting date"

Quarterly Vesting Date financial

""Quarterly Vesting Date" shall mean the 15th of each of March, June, September and December"

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Accepted by SEC EDGAR 04/16/2026 - 06:40 PM EDT Learn about SEC filing dates

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^*

Nithrakashyap Arvind

(Last) (First) (Middle)

C/O RUBRIK INC.

3495 DEER CREEK ROAD

(Street)

PALO ALTO CALIFORNIA 94304

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/14/2026

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

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

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

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	V	Amount	(A) or (D)	Price
Class A Common Stock	04/14/2026		A(1)		92,834	A	$0	441,502	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 (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	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents the grant of restricted stock units ("RSUs") that vest as follows: 2.5% of the RSUs shall vest on each of the first four Quarterly Vesting Dates (as defined below) that occur following March 15, 2026, and the remainder shall vest in twelve equal installments on each subsequent Quarterly Vesting Date thereafter, in each case subject to the Reporting Person's Continuous Service (as defined in the 2024 Equity Incentive Plan) through each applicable vesting date. "Quarterly Vesting Date" shall mean the 15th of each of March, June, September and December.

	/s/ Larry Guo, Attorney-in-Fact	04/16/2026
	** 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.
* Form 4: SEC 1474 (03-26)