RBRK (NYSE: RBRK) plans sale of Class A shares in 2026

Rhea-AI Filing Summary

A planned sale covers 3,979 Class A shares, to be transacted through Merrill Lynch, Pierce, Fenner & Smith Incorporated on the NYSE around July 13, 2026.

These shares are referenced as having been acquired on January 27, 2014 in a Private Placement from the Issuer for cash. The record also lists recent Class A sales in late June 2026 by entities including Lightspeed Management Company, LLC and Eggers Investments LP – Fund 2, each with specified share amounts and dates.

Key Figures

Planned Class A shares for sale: 3,979 shares Planned sale date: 07/13/2026 Acquisition date of planned sale shares: 01/27/2014 +3 more

6 metrics

Planned Class A shares for sale 3,979 shares Referenced in the securities information row with Merrill Lynch and the NYSE.

Planned sale date 07/13/2026 Listed next to the 3,979 Class A shares in the securities information section.

Acquisition date of planned sale shares 01/27/2014 Shown in the "Securities To Be Sold" section with Private Placement and Issuer.

Recent sale by Lightspeed Management Company, LLC 3,979 shares Class A shares sold on 06/26/2026 in the "Securities Sold During The Past 3 Months" section.

Recent sale by Lightspeed General Partner IX, LP 7,592 shares Class A shares listed as sold on 06/26/2026.

Recent sale by Eggers Investments LP – Fund 2 50,000 shares Class A shares listed as sold on 06/30/2026.

Key Terms

Securities To Be Sold, Private Placement, Securities Sold During The Past 3 Months

3 terms

Securities To Be Sold financial

"144: Securities To Be Sold Class A | 01/27/2014 | Private Placement"

Private Placement financial

"Class A | 01/27/2014 | Private Placement | Issuer |"

A private placement is a sale of securities directly to a selected group of investors, typically institutions or accredited investors, instead of through a public offering. It lets a company raise money faster and with fewer regulatory steps; for existing shareholders it matters because the newly issued shares, often sold at a discount, increase the share count and can dilute their ownership.

Securities Sold During The Past 3 Months financial

"144: Securities Sold During The Past 3 Months Lightspeed Management Company, LLC"

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Available on EDGAR 07/13/2026 - 07:27 PM Accepted by SEC EDGAR 07/13/2026 - 07:26 PM Learn about SEC filing dates

FAQ

How many RBRK Class A shares are covered by the planned sale?

The planned transaction covers 3,979 Class A shares. These shares are listed in the securities information section together with Merrill Lynch as broker and the NYSE as the exchange.

When is the planned sale date for the RBRK Class A shares?

The planned sale date is listed as 07/13/2026. This date appears alongside the 3,979 Class A shares and the NYSE, indicating the approximate timing of the proposed transaction.

How and when were the 3,979 RBRK Class A shares originally acquired?

The 3,979 Class A shares are shown as acquired on 01/27/2014 through a Private Placement from the Issuer for cash. This information appears in the "Securities To Be Sold" section.

Which entities sold RBRK Class A shares in the past 3 months and in what amounts?

The record shows sales by Lightspeed Management Company, LLC (3,979 shares on 06/26/2026), Lightspeed General Partner Select II, LP (155 shares), Lightspeed General Partner IX, LP (7,592 shares), and Eggers Investments LP – Fund 2 (50,000 shares on 06/30/2026).

On which exchange is the planned sale of RBRK Class A shares to occur?

The Class A shares are associated with the NYSE. The securities information row links 3,979 Class A shares, Merrill Lynch, and the NYSE, indicating the exchange where the planned sale is expected.

Which broker is named for the planned RBRK Class A share sale?

The broker named is Merrill Lynch, Pierce, Fenner & Smith Incorporated, with an address at 555 California Street, 18th Floor, San Francisco, CA 94104, listed alongside the 3,979 Class A shares.

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	3979	333440.2	160956763	07/13/2026	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	01/27/2014	Private Placement	Issuer			3979	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, Ste 100 Menlo Park CA 94025	Class A	06/26/2026	3979	282244
Lightspeed General Partner Select II, LP 2200 Sand Hill Road, Ste 100 Menlo Park CA 94025	Class A	06/26/2026	155	10995
Lightspeed General Partner IX, LP 2200 Sand Hill Road, Ste 100 Menlo Park CA 94025	Class A	06/26/2026	7592	538524
Eggers Investments LP - Fund 2 2200 Sand Hill Road, Ste 100 Menlo Park CA 94025	Class A	06/30/2026	50000	3891955

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)