[Form 4] Rubrik, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Rubrik, Inc. (RBRK) filed a Form 4 disclosing that director and 10% owner Ravi Mhatre sold 16,984 Class A common shares on 06/30/2025 at a weighted-average price of $89.47. The sale, executed through Lightspeed Management Company, L.L.C., generated approximately $1.52 million in gross proceeds. No other open-market transactions or derivative activities were reported in this filing.

After the transaction, Mhatre’s beneficial ownership is reported as follows:

• 81,842 shares held directly
• 396,874 shares held indirectly via Mhatre Investments LP – Fund 2
• 75,499 shares held indirectly via Mhatre Investments LP – Fund 3
• 649 shares held indirectly via the Mhatre 2011 Irrevocable Children’s Trust

In total, Mhatre retains approximately 554,864 shares of Rubrik Class A common stock following the sale, maintaining a substantial stake in the company. No shares remain under Lightspeed Management Company after the disposition. The filing contains the customary footnote affirming the weighted-average price range ($89.30-$89.69) and standard disclaimers regarding pecuniary interest.

Positive

• Insider retains a sizable position of about 554,864 shares, indicating continued alignment with shareholder interests despite the recent sale.

Negative

• 16,984 shares were sold by a director and 10% owner, which may raise modest concerns about insider confidence.

Insights

Securities Analyst

TL;DR: Minor insider sale; ownership still large—signal appears neutral.

Ravi Mhatre disposed of 16,984 shares (~$1.5 M) through an affiliated entity, reducing that vehicle’s position to zero. However, he continues to hold roughly 555 k shares across direct and indirect accounts, preserving significant economic exposure. Given the modest size relative to his remaining stake and the absence of other negative catalysts, I view the filing as neutral for near-term sentiment. Investors should monitor future filings for any acceleration in selling.

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
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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^*

Mhatre Ravi

(Last) (First) (Middle)

2200 SAND HILL ROAD

(Street)

MENLO PARK CA 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)

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

3. Date of Earliest Transaction (Month/Day/Year)
06/30/2025

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	06/30/2025		S		16,984	D	$89.47(1)	0	I	By Lightspeed Management Company, L.L.C.(2)
Class A Common Stock								81,842	D
Class A Common Stock								396,874	I	By Mhatre Investments LP - Fund 2(3)
Class A Common Stock								649	I	By Trust(4)
Class A Common Stock								75,499	I	By Mhatre Investments LP - Fund 3(5)

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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $89.30 to $89.69 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

2. Shares are held by Lightspeed Management Company, L.L.C. ("LMC"). The Reporting Person is a managing member of LMC and shares voting and dispositive power with respect to the shares held by LMC. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

3. The Reporting Person serves as trustee of the general partner of Mhatre Investments LP - Fund 2.

4. The Reporting Person is the trustee of the Mhatre 2011 Irrevocable Children's Trust.

5. The Reporting Person serves as trustee of the general partner of Mhatre Investments LP - Fund 3.

	/s/ Ravi Mhatre	07/02/2025
	** 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

How many Rubrik (RBRK) shares did Ravi Mhatre sell?

He sold 16,984 Class A shares on 06/30/2025.

What was the sale price of the RBRK shares?

The weighted-average sale price was $89.47, within a range of $89.30-$89.69.

How many Rubrik shares does Ravi Mhatre now own?

He beneficially owns about 554,864 shares (81,842 direct and 473,022 indirect).

Did the filing report any derivative transactions?

No, no derivative securities were acquired or disposed of in this Form 4.

What entity executed the share sale?

The sale was executed by Lightspeed Management Company, L.L.C., where Mhatre is a managing member.