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C 10b5-1 Plan

$ Value

Shares

Price

$0

Filed

Jun 5

Insider

Name

Nithrakashyap Arvind

Title

Chief Technology Officer

CIK

0002019143

Roles

Director Officer

Transaction Details

Transaction Date

2025-06-03

Code

C

Table

Derivative

Ownership

Direct

Equity Swap

No

Shares After

10,395,906

Footnotes

This sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan, adopted September 21, 2024. | The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $97.975 to $98.97 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote. | The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $98.975 to $99.815 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote. | he reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $97.575 to $98.57 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote. | he reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $98.575 to $99.385 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote. | The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $97.92 to $98.91 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote. | The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $98.925 to $99.915 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote. | The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $99.925 to $100.91 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote. | The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $100.93 to $101.755 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote. | Each share of Class B Common Stock held by the Reporting Person will automatically convert into one share of Class A Common Stock upon the sale or transfer of such share of Class B Common Stock, subject to certain exceptions, and in certain other circumstances described in the Issuer's amended and restated certificate of incorporation. Each share of Class B Common Stock is also convertible at any time at the option of the Reporting Person into one share of Class A Common Stock. | The shares are held of record by Arvind Nithrakashyap, as Trustee of the Nithrakashyap/Chatterjee Revocable Trust, for which the Reporting Person serves as trustee and shares voting and dispositive power with his spouse.

Filing Info

Accession No.

0001415889-25-015860

Form Type

4

Issuer CIK

0001943896

Nithrakashyap Arvind's History

Date Ticker Type Value
2026-04-14 RBRK A $0
2026-03-24 RBRK C $0
2026-03-24 RBRK $1.4M
2026-03-24 RBRK M $0
2026-03-24 RBRK M $0
2026-03-24 RBRK C $0
2026-01-15 RBRK $327K
2026-01-14 RBRK $73K
2025-12-23 RBRK C $0
2025-12-23 RBRK G $0

Other Insiders at RBRK (90d)

Insider Bought Sold Last
MCLAUGHLIN MARK D $502K 2026-03-30
THOMPSON JOHN WENDELL $2.1M 2026-04-01
Nithrakashyap Arvind
Chief Technology Officer
$1.4M 2026-04-14
McCarthy Brian K.
Pres.,Global Sales & Field Ops
2026-01-31
Choudary Kiran Kumar
Chief Financial Officer
$8.0M 2026-04-14