Rubrik (NYSE: RBRK) holder plans Rule 144 sale of 5,307 Class A shares

Rhea-AI Filing Summary

A holder of RBRK Class A common stock has filed a notice under Rule 144 to sell 5,307 shares through Merrill Lynch on the NYSE, with an aggregate market value of $462,133.56. These shares were originally acquired from the issuer in a private placement on 01/27/2014 for cash.

The notice also discloses that during the past three months, Eggers Investments LP - Fund 2 sold 40,000 Class A shares on 12/08/2025 for gross proceeds of $3,472,858. The filing states that the seller does not know of any undisclosed material adverse information about the issuer’s current or prospective operations.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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 Incorporated 555 California Street 18th Floor San Francisco CA 94104	5307	462133.56	151894462	12/12/2025	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			5307	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
Eggers Investments LP - Fund 2 2200 SAND HILL RD STE 100 MENLO PARK CA 94025	Class A	12/08/2025	40000	3472858

144: Remarks and Signature

Remarks

Date of Notice

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the Form 144 filing for RBRK disclose?

The Form 144 discloses that a holder of RBRK Class A common stock intends to sell 5,307 shares under Rule 144 through Merrill Lynch on the NYSE, with an aggregate market value of $462,133.56.

How many RBRK shares are being proposed for sale under this Form 144?

The notice covers a proposed sale of 5,307 Class A shares of RBRK common stock under Rule 144.

What prior RBRK share sales are reported in the past three months?

The filing reports that Eggers Investments LP - Fund 2 sold 40,000 Class A shares on 12/08/2025 for gross proceeds of $3,472,858.

How and when were the RBRK shares being sold under Form 144 originally acquired?

The 5,307 Class A shares were acquired in a private placement from the issuer on 01/27/2014, paid for in cash on the same date.

What representations does the RBRK Form 144 seller make about company information?

The seller represents that they do not know of any material adverse information about the issuer’s current or prospective operations that has not been publicly disclosed.

On which exchange are the RBRK shares intended to be sold and through which broker?

The proposed sale of 5,307 Class A shares is to be executed on the NYSE through Merrill Lynch, Pierce, Fenner & Smith Incorporated.