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▼ SELL

$ Value

$347K

Shares

4,670

Price

$74

Filed

Sep 18

Insider

Name

McCarthy Brian K.

Title

Chief Revenue Officer

CIK

0002020217

Roles

Officer

Transaction Details

Transaction Date

2025-09-16

Code

S

Table

Non-Derivative

Ownership

Direct

Equity Swap

No

Shares After

407,632

Footnotes

This sale reported on this Form 4 was effected pursuant to the Issuer's policy requiring sell-to-cover to satisfy certain tax obligations of the Reporting Person incurred with the vesting and settlement of certain Restricted Stock Units (RSUs). | Each RSU represents a contingent right to receive one share of Class B Common Stock. | The RSUs shall vest as follows: 1/16 of the shares subject to the RSU vested on June 15, 2022, and 1/16 of the shares subject to the RSU vest every quarter thereafter, and a liquidity event-based vesting condition which was satisfied upon the effectiveness of the registration statement on Form S-1 filed by the Issuer in connection with the Issuer's initial public offering, all subject to the Reporting Person continuing to have a Service Relationship (as defined in the Issuer's Amended and Restated 2014 Stock Option and Grant Plan). | 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 will also be convertible at any time at the option of the Reporting Person into one share of Class A Common Stock.

Filing Info

Accession No.

0002020217-25-000008

Form Type

4

Issuer CIK

0001943896

McCarthy Brian K.'s History

Date Ticker Type Value
2026-01-31 RBRK A $0
2026-01-31 RBRK A $0
2026-01-12 RBRK $140K
2026-01-12 RBRK $289K
2026-01-12 RBRK $281K
2025-12-17 RBRK $217K
2025-12-17 RBRK $148K
2025-12-16 RBRK C $0
2025-12-16 RBRK M $0
2025-12-16 RBRK M

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