Rubrik CTO uses 10,436 shares to cover option costs

Rhea-AI Filing Summary

Rubrik, Inc. (RBRK) reported that Chief Technology Officer and director Nithrakashyap Arvind had 10,436 shares of Class A common stock withheld or delivered on September 15, 2026 to cover the payment of an option exercise price or related tax liability at $100.20 per share. Following this transaction, he held 282,857 shares directly. No Rule 10b5-1 trading plan is reported for this transaction.

Insider Trade Summary

Exercise Price or Tax Liability: 10,436 shares

Exercise Price or Tax Liability 1 txn

Insider Nithrakashyap Arvind

Role Chief Technology Officer

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Class A Common Stock	10,436	$100.20	$1.05M

Holdings After Transaction: Class A Common Stock — 282,857 shares (Direct)

Key Figures

Shares delivered or withheld: 10,436 shares Per-share reference price: $100.20 per share Shares held after transaction: 282,857 shares +1 more

4 metrics

Shares delivered or withheld 10,436 shares Class A common stock used on September 15, 2026 to pay an option exercise price or tax liability

Per-share reference price $100.20 per share Price applied to the 10,436 shares delivered or withheld on September 15, 2026

Shares held after transaction 282,857 shares Direct holdings of Rubrik Class A common stock by Nithrakashyap Arvind after the reported transaction

Number of exercise-price-or-tax-liability transactions 1 transaction Single reported event involving delivery or withholding of shares to cover an option exercise price or tax liability

Key Terms

Rule 10b5-1 trading plan, exercise price, tax liability

3 terms

Rule 10b5-1 trading plan regulatory

"No Rule 10b5-1 trading plan is reported for this transaction"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

exercise price financial

"Payment of exercise price or tax liability by delivering or withholding securities"

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

tax liability financial

"Payment of exercise price or tax liability by delivering or withholding securities"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Rubrik, Inc. (RBRK) disclose for Nithrakashyap Arvind?

Rubrik disclosed that Nithrakashyap Arvind had 10,436 shares of Class A common stock withheld or delivered on September 15, 2026 to pay an option exercise price or related tax liability at $100.20 per share.

How many Rubrik (RBRK) shares does Nithrakashyap Arvind hold after this Form 4 transaction?

After the reported transaction, Nithrakashyap Arvind directly holds 282,857 shares of Rubrik Class A common stock, as stated in the filing.

Was the Rubrik (RBRK) insider transaction under a Rule 10b5-1 trading plan?

No. The filing indicates that no Rule 10b5-1 trading plan is associated with the reported transaction for Nithrakashyap Arvind.

What price per share was used in Nithrakashyap Arvind’s Rubrik (RBRK) share withholding?

The transaction used a price of $100.20 per share for the 10,436 Rubrik Class A common shares withheld or delivered to cover an option exercise price or tax liability.

Does the Form 4 show Nithrakashyap Arvind buying or selling Rubrik (RBRK) shares in the market?

No. The Form 4 reports shares delivered or withheld to pay an option exercise price or related tax liability, not an open-market purchase or sale.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/17/2026 - 09:16 PM Accepted by SEC EDGAR 09/17/2026 - 09:15 PM 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)
09/15/2026

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	09/15/2026		F		10,436	D	$100.2	282,857	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:

	/s/ Anne-Kathrin Lalendran, Attorney-in-Fact	09/17/2026
	** 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)