RBRK Files 4 with SEC

Rhea-AI Filing Summary

Rubrik, Inc. insider activity: A reporting person who is both a director and the Chief Technology Officer of Rubrik, Inc. reported transactions dated 12/23/2025 involving Class A and Class B Common Stock. The filing shows a conversion of 100,000 shares of Class B Common Stock into 100,000 shares of Class A Common Stock at a stated price of $0 per share, increasing direct Class A holdings to 442,703 shares. On the same date, 100,000 shares of Class A Common Stock were disposed of as a transaction coded "G" at a stated price of $0 per share, leaving 342,703 Class A shares held directly. The reporting person also continues to hold Class B Common Stock that is convertible into Class A Common Stock, including 200,000 shares held indirectly through the Nithrakashyap/Chatterjee Revocable Trust.

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

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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 CA 94304

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
12/23/2025

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

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

X	Form filed by One Reporting Person
	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)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	12/23/2025		C		100,000	A	$0	442,703	D
Class A Common Stock	12/23/2025		G		100,000	D	$0	342,703	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
Class B Common Stock	(1)	12/23/2025		C			100,000	(1)	(1)	Class A Common Stock	100,000	$0	10,230,945	D
Class B Common Stock	(1)							(1)	(1)	Class A Common Stock	200,000		200,000	I	By Arvind Nithrakashyap, as Trustee of the Nithrakashyap/Chatterjee Revocable Trust(2)

Explanation of Responses:

1. 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 is also convertible at any time at the option of the Reporting Person into one share of Class A Common Stock.

2. The shares are held of record by Arvind Nithrakashyap, as Trustee of the Nithrakashyap/Chatterjee Revocable Trust, for which the Reporting Person serves as trustee and shares voting and dispositive power with his spouse.

	/s/ Larry Guo, Attorney-in-Fact	12/23/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider transaction did Rubrik (RBRK) report on 12/23/2025?

The filing reports that a Rubrik, Inc. director and Chief Technology Officer converted 100,000 shares of Class B Common Stock into 100,000 shares of Class A Common Stock and also reported a disposition of 100,000 shares of Class A Common Stock on 12/23/2025.

How many Rubrik (RBRK) Class A shares does the insider hold after the reported Form 4 transactions?

After the reported transactions, the insider beneficially owns 342,703 shares of Rubrik, Inc. Class A Common Stock directly.

What was the reported price for the Rubrik (RBRK) insider transactions?

Both the conversion of 100,000 Class B shares into Class A shares and the disposition of 100,000 Class A shares were reported at a stated price of $0 per share.

Does the Rubrik (RBRK) insider still hold Class B Common Stock after these transactions?

Yes. The filing shows the insider continues to beneficially own Class B Common Stock that is convertible into Class A Common Stock, including 200,000 shares held indirectly through the Nithrakashyap/Chatterjee Revocable Trust.

Who is the reporting person in this Rubrik (RBRK) insider filing and what is their role?

The reporting person is a member of Rubrik, Inc.'s board of directors and serves as the company’s Chief Technology Officer, as indicated in the relationship section of the filing.

How are the Rubrik (RBRK) trust-held shares described in the insider report?

The filing states that certain shares are held of record by Arvind Nithrakashyap, as Trustee of the Nithrakashyap/Chatterjee Revocable Trust, where the reporting person serves as trustee and shares voting and dispositive power with his spouse.