Arvind Nithrakashyap to Sell 29,015 RBRK Shares (RBRK)

Rhea-AI Filing Summary

Arvind Nithrakashyap reported intent to sell 29,015 shares of Class A Common Stock under Rule 144.

The filing lists the securities as Restricted Stock Units vesting under a registered plan with an execution date of 03/24/2026. The excerpt also records prior dispositions: 1,045 shares sold on 01/14/2026 for $73,202.25 and 4,648 shares sold on 01/15/2026 for $324,219.20.

Insights

Securities Counsel

Rule 144 notice records a planned resale of restricted shares and recent small dispositions.

Rule 144 filings are notices of intended sale under resale conditions; this entry lists 29,015 shares tied to restricted stock units vesting under a registered plan with an indicated date of 03/24/2026. The filing signals a holder preparing to rely on resale conditions for restricted holdings.

Cash‑flow treatment and exact sale mechanics are not stated in the excerpt. Subsequent filings or broker confirmations would show execution details and any compliance with holding periods or volume limitations.

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

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 Common Stock	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 39th Floor New York NY 10004	29015	1415061.55	157404648	03/24/2026	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 Common Stock	03/24/2026	Restricted Stock Units vesting under registered plan	Issuer			29015	03/24/2026	Compensation

* 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
Arvind Nithrakashyap 3495 Deer Creek Road Palo Alto CA 94304	Class A Common Stock	01/14/2026	1045	73202.25
Arvind Nithrakashyap 3495 Deer Creek Road Palo Alto CA 94304	Class A Common Stock	01/15/2026	4648	324219.20

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 for RBRK show?

It shows a planned resale of 29,015 shares of Class A Common Stock tied to restricted stock units. The filing cites an execution date of 03/24/2026 and identifies the securities as vested under a registered plan.

Who is the selling party in the RBRK Form 144?

The seller is listed as Arvind Nithrakashyap. The filing identifies recent prior dispositions by the same name on 01/14/2026 and 01/15/2026, indicating prior sales of company shares.

How many shares were sold recently before this Form 144?

The excerpt records prior sales of 1,045 shares on 01/14/2026 for $73,202.25 and 4,648 shares on 01/15/2026 for $324,219.20. These are reported dispositions in the filing.

Are these shares part of an employee compensation plan for RBRK?

Yes; the filing describes the securities as Restricted Stock Units vesting under a registered plan. The listed 29,015 shares are associated with compensation‑related vesting events dated 03/24/2026.