Rubrik (RBRK) CTO Arvind reports Rule 10b5-1 insider stock sales

Rhea-AI Filing Summary

Rubrik, Inc. Chief Technology Officer and director Nithrakashyap Arvind reported open‑market sales of Class A common stock. On January 14, 2026, he sold 1,045 shares at a weighted average price of $70.05 per share. On January 15, 2026, he sold an additional 4,648 shares at a weighted average price of $70.40 per share. The filing notes these transactions were made under a Rule 10b5‑1 trading plan adopted on October 15, 2025. After these sales, he directly beneficially owned 337,010 shares of Rubrik Class A common stock.

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

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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).

X

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)
01/14/2026

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	01/14/2026		S(1)		1,045	D	$70.05(2)	341,658	D
Class A Common Stock	01/15/2026		S(1)		4,648	D	$70.4(3)	337,010	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. This sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan, adopted October 15, 2025.

2. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $70.02 to $70.175 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.

3. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $70.01 to $70.705 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.

	/s/ Larry Guo, Attorney-in-Fact	01/16/2026
	** 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).
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FAQ

Who is the insider trading Rubrik (RBRK) shares in this Form 4?

The reporting person is Nithrakashyap Arvind, who serves as a director and Chief Technology Officer of Rubrik, Inc.

How many Rubrik (RBRK) shares did Nithrakashyap Arvind sell?

He sold 1,045 Class A common shares on January 14, 2026 and 4,648 Class A common shares on January 15, 2026.

At what prices were the Rubrik (RBRK) shares sold in this Form 4?

On January 14, 2026, shares were sold at a weighted average price of $70.05. On January 15, 2026, shares were sold at a weighted average price of $70.40.

Were the Rubrik (RBRK) share sales made under a Rule 10b5-1 trading plan?

Yes. The filing states the sale reported was effected pursuant to a Rule 10b5‑1 trading plan adopted on October 15, 2025.

How many Rubrik (RBRK) shares does Nithrakashyap Arvind own after these transactions?

Following the reported transactions, he directly beneficially owned 337,010 shares of Rubrik Class A common stock.

Were the Rubrik (RBRK) sales executed as single trades or multiple trades?

The prices reported are weighted averages. The shares on each date were sold in multiple transactions within disclosed price ranges, and detailed breakdowns are available upon request from the reporting person.