Major VC Firm Lightspeed Reduces Stake in Data Security Giant Rubrik

Rhea-AI Filing Summary

Lightspeed General Partner IX, L.P., a 10% stockholder, director, and officer of Rubrik, has filed a Form 144 notice for the proposed sale of 32,396 Class A shares valued at $2,820,094.48 on the NYSE. The sale is scheduled for June 27, 2025, through Merrill Lynch.

Key details of the transaction:

• The shares were originally acquired through private placement from the issuer on January 27, 2014
• Current outstanding shares: 123,563,326
• Previous sale: Lightspeed Management Company LLC sold 13,213 Class A shares on April 15, 2025, for $832,177.20

The filing was signed by Andrew Moley, confirming no knowledge of undisclosed material adverse information regarding Rubrik's operations. The seller has certified compliance with Rule 144 requirements for the proposed transaction.

Positive

• None.

Negative

• Major shareholder Lightspeed General Partner IX, L.P. plans to sell 32,396 shares worth approximately $2.82M, following another recent sale of 13,213 shares in April 2025 worth $832K, indicating continued insider selling pressure

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001913317
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Rubrik, Inc.
SEC File Number	001-42028
Address of Issuer	3495 DEER CREEK ROAD PALO ALTO CALIFORNIA 94304
Phone	8444782745
Name of Person for Whose Account the Securities are To Be Sold	Lightspeed General Partner IX, L.P.
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer
Relationship to Issuer	Director
Relationship to Issuer	10% Stockholder

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Class A	Merrill Lynch, Pierce, Fenner & Smith Inc. 555 California Street Floor 18 San Francisco CA 94104	32396	2820094.48	123563326	06/27/2025	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Class A	01/27/2014	Private Placement	Issuer			32396	01/27/2014	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
LIGHTSPEED MANAGEMENT COMPANY LLC 2200 Sand Hill Road Menlo Park CA 94025	Class A	04/15/2025	13213	832177.20

144: Remarks and Signature

Remarks
Date of Notice	06/27/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Andrew Moley
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

How many RBRK shares is Lightspeed General Partner IX, L.P. planning to sell?

According to the Form 144 filing, Lightspeed General Partner IX, L.P. is planning to sell 32,396 shares of Rubrik's Class A common stock on the NYSE.

What is the market value of RBRK shares being sold by Lightspeed in this Form 144?

The aggregate market value of the shares to be sold is $2,820,094.48, representing 32,396 Class A shares of Rubrik (RBRK).

When did Lightspeed initially acquire these RBRK shares?

Lightspeed acquired these shares on January 27, 2014, through a private placement directly from the issuer (Rubrik). The acquisition was made with cash payment.

Has Lightspeed sold any other RBRK shares in the past 3 months?

Yes, Lightspeed Management Company LLC sold 13,213 Class A shares on April 15, 2025, for gross proceeds of $832,177.20.

What is the total number of RBRK shares outstanding?

According to the Form 144 filing, Rubrik (RBRK) has 123,563,326 shares outstanding.