Cynosure Group, LLC - 15 May 2026 Form 4 Insider Report for Black Rock Coffee Bar, Inc. (BRCB)

Reporting relationship: Director, 10%+ Owner
Issuer ticker: BRCB
Reported as of: 15 May 2026
Net transaction value: +$72,988,509
SEC form: 4
Accepted by SEC: 19 May 2026, 17:59:22 UTC
Prior SEC filing: 12 Sep 2025
Source filing: View source filing
Reporting owner signature: /s/ Andrew Braithwaite, Authorized Signatory

Key filing fact

Cynosure Group, LLC filed Form 4 for Black Rock Coffee Bar, Inc. (BRCB) on 19 May 2026.

Key facts

This page summarizes Cynosure Group, LLC's Form 4 filing for Black Rock Coffee Bar, Inc. (BRCB).
6 reported transactions and 12 derivative rows are listed below.
Accepted by SEC: 19 May 2026, 17:59.

Change

Previous filing in this sequence was filed on 12 Sep 2025.
Current net transaction value: +$72,988,509.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (6)

CIK 0001763409 Primary reporting owner

Cynosure Group, LLC

Relationship: Director, 10%+ Owner
Address: 111 S. MAIN STREET, SUITE 2350, SALT LAKE CITY
Signature: /s/ Andrew Braithwaite, Authorized Signatory
Signature date: 19 May 2026

CIK 0001826569

Cynosure Partners 2020, LP

Relationship: Director, 10%+ Owner
Address: 111 S. MAIN STREET, SUITE 2350, SALT LAKE CITY
Signature: /s/ Andrew Braithwaite, Authorized Signatory
Signature date: 19 May 2026

CIK 0001840055

Cynosure Partners 2020 PV, LP

Relationship: Director, 10%+ Owner
Address: 111 S. MAIN STREET, SUITE 2350, SALT LAKE CITY
Signature: /s/ Andrew Braithwaite, Authorized Signatory
Signature date: 19 May 2026

CIK 0001844090

Cynosure Partners 2020 Co-investment, LLC

Relationship: Director, 10%+ Owner
Address: 111 S. MAIN STREET, SUITE 2350, SALT LAKE CITY
Signature: /s/ Andrew Braithwaite, Authorized Signatory
Signature date: 19 May 2026

CIK 0001951018

Cynosure Partners III, LP

Relationship: Director, 10%+ Owner
Address: 111 S. MAIN STREET, SUITE 2350, SALT LAKE CITY
Signature: /s/ Andrew Braithwaite, Authorized Signatory
Signature date: 19 May 2026

CIK 0002050077

Cynosure Partners III Offshore, LP

Relationship: Director, 10%+ Owner
Address: 111 S. MAIN STREET, SUITE 2350, SALT LAKE CITY
Signature: /s/ Andrew Braithwaite, Authorized Signatory
Signature date: 19 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

BRCB transaction

Class B Common Stock

Purchase

Transaction value: $64,428,509
Shares: +12,042,712
Change %: +153%
Price: $5.35
Shares after: 19,915,304
Date: 15 May 2026
Ownership: See footnote
Footnotes: F1

BRCB transaction

Class B Common Stock

Purchase

Transaction value: $64,428,509
Shares: +12,042,712
Change %: +153%
Price: $5.35
Shares after: 19,915,304
Date: 15 May 2026
Ownership: See footnote
Footnotes: F1

BRCB transaction

Class B Common Stock

Purchase

Transaction value: $64,428,509
Shares: +12,042,712
Change %: +153%
Price: $5.35
Shares after: 19,915,304
Date: 15 May 2026
Ownership: See footnote
Footnotes: F1

BRCB transaction

Class B Common Stock

Purchase

Transaction value: $64,428,509
Shares: +12,042,712
Change %: +153%
Price: $5.35
Shares after: 19,915,304
Date: 15 May 2026
Ownership: See footnote
Footnotes: F1

BRCB transaction

Class B Common Stock

Purchase

Transaction value: $64,428,509
Shares: +12,042,712
Change %: +153%
Price: $5.35
Shares after: 19,915,304
Date: 15 May 2026
Ownership: See footnote
Footnotes: F1

BRCB transaction

Class B Common Stock

Purchase

Transaction value: $64,428,509
Shares: +12,042,712
Change %: +153%
Price: $5.35
Shares after: 19,915,304
Date: 15 May 2026
Ownership: See footnote
Footnotes: F1

BRCB transaction

Class A Common Stock

Purchase

Transaction value: $8,560,000
Shares: +1,600,000
Change %: +506%
Price: $5.35
Shares after: 1,916,012
Date: 15 May 2026
Ownership: See footnote
Footnotes: F2

BRCB transaction

Class A Common Stock

Purchase

Transaction value: $8,560,000
Shares: +1,600,000
Change %: +506%
Price: $5.35
Shares after: 1,916,012
Date: 15 May 2026
Ownership: See footnote
Footnotes: F2

BRCB transaction

Class A Common Stock

Purchase

Transaction value: $8,560,000
Shares: +1,600,000
Change %: +506%
Price: $5.35
Shares after: 1,916,012
Date: 15 May 2026
Ownership: See footnote
Footnotes: F2

BRCB transaction

Class A Common Stock

Purchase

Transaction value: $8,560,000
Shares: +1,600,000
Change %: +506%
Price: $5.35
Shares after: 1,916,012
Date: 15 May 2026
Ownership: See footnote
Footnotes: F2

BRCB transaction

Class A Common Stock

Purchase

Transaction value: $8,560,000
Shares: +1,600,000
Change %: +506%
Price: $5.35
Shares after: 1,916,012
Date: 15 May 2026
Ownership: See footnote
Footnotes: F2

BRCB transaction

Class A Common Stock

Purchase

Transaction value: $8,560,000
Shares: +1,600,000
Change %: +506%
Price: $5.35
Shares after: 1,916,012
Date: 15 May 2026
Ownership: See footnote
Footnotes: F2

BRCB transaction

Class B Common Stock

Other

Transaction value
Shares: -119,892
Change %: -0.6%
Price
Shares after: 19,795,412
Date: 15 May 2026
Ownership: See footnote
Footnotes: F1, F3

BRCB transaction

Class B Common Stock

Other

Transaction value
Shares: -119,892
Change %: -0.6%
Price
Shares after: 19,795,412
Date: 15 May 2026
Ownership: See footnote
Footnotes: F1, F3

BRCB transaction

Class B Common Stock

Other

Transaction value
Shares: -119,892
Change %: -0.6%
Price
Shares after: 19,795,412
Date: 15 May 2026
Ownership: See footnote
Footnotes: F1, F3

BRCB transaction

Class B Common Stock

Other

Transaction value
Shares: -119,892
Change %: -0.6%
Price
Shares after: 19,795,412
Date: 15 May 2026
Ownership: See footnote
Footnotes: F1, F3

BRCB transaction

Class B Common Stock

Other

Transaction value
Shares: -119,892
Change %: -0.6%
Price
Shares after: 19,795,412
Date: 15 May 2026
Ownership: See footnote
Footnotes: F1, F3

BRCB transaction

Class B Common Stock

Other

Transaction value
Shares: -119,892
Change %: -0.6%
Price
Shares after: 19,795,412
Date: 15 May 2026
Ownership: See footnote
Footnotes: F1, F3

BRCB transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +119,892
Change %: +6.3%
Price
Shares after: 2,035,904
Date: 15 May 2026
Ownership: See footnote
Footnotes: F2, F4

BRCB transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +119,892
Change %: +6.3%
Price
Shares after: 2,035,904
Date: 15 May 2026
Ownership: See footnote
Footnotes: F2, F4

BRCB transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +119,892
Change %: +6.3%
Price
Shares after: 2,035,904
Date: 15 May 2026
Ownership: See footnote
Footnotes: F2, F4

BRCB transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +119,892
Change %: +6.3%
Price
Shares after: 2,035,904
Date: 15 May 2026
Ownership: See footnote
Footnotes: F2, F4

BRCB transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +119,892
Change %: +6.3%
Price
Shares after: 2,035,904
Date: 15 May 2026
Ownership: See footnote
Footnotes: F2, F4

BRCB transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +119,892
Change %: +6.3%
Price
Shares after: 2,035,904
Date: 15 May 2026
Ownership: See footnote
Footnotes: F2, F4

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

BRCB transaction Derivative

LLC Units

Purchase

Transaction value
Shares: +12,042,712
Change %: +153%
Price
Shares after: 19,915,304
Date: 15 May 2026
Ownership: See footnote
Underlying class: Class A Common Stock
Underlying amount: 12,042,712
Exercise price
Footnotes: F1, F5

BRCB transaction Derivative

LLC Units

Purchase

Transaction value
Shares: +12,042,712
Change %: +153%
Price
Shares after: 19,915,304
Date: 15 May 2026
Ownership: See footnote
Underlying class: Class A Common Stock
Underlying amount: 12,042,712
Exercise price
Footnotes: F1, F5

BRCB transaction Derivative

LLC Units

Purchase

Transaction value
Shares: +12,042,712
Change %: +153%
Price
Shares after: 19,915,304
Date: 15 May 2026
Ownership: See footnote
Underlying class: Class A Common Stock
Underlying amount: 12,042,712
Exercise price
Footnotes: F1, F5

BRCB transaction Derivative

LLC Units

Purchase

Transaction value
Shares: +12,042,712
Change %: +153%
Price
Shares after: 19,915,304
Date: 15 May 2026
Ownership: See footnote
Underlying class: Class A Common Stock
Underlying amount: 12,042,712
Exercise price
Footnotes: F1, F5

BRCB transaction Derivative

LLC Units

Purchase

Transaction value
Shares: +12,042,712
Change %: +153%
Price
Shares after: 19,915,304
Date: 15 May 2026
Ownership: See footnote
Underlying class: Class A Common Stock
Underlying amount: 12,042,712
Exercise price
Footnotes: F1, F5

BRCB transaction Derivative

LLC Units

Purchase

Transaction value
Shares: +12,042,712
Change %: +153%
Price
Shares after: 19,915,304
Date: 15 May 2026
Ownership: See footnote
Underlying class: Class A Common Stock
Underlying amount: 12,042,712
Exercise price
Footnotes: F1, F5

BRCB transaction Derivative

LLC Units

Conversion of derivative security

Transaction value
Shares: -119,892
Change %: -0.6%
Price
Shares after: 19,795,412
Date: 15 May 2026
Ownership: See footnote
Underlying class: Class A Common Stock
Underlying amount: 119,892
Exercise price
Footnotes: F2, F4, F5

BRCB transaction Derivative

LLC Units

Conversion of derivative security

Transaction value
Shares: -119,892
Change %: -0.6%
Price
Shares after: 19,795,412
Date: 15 May 2026
Ownership: See footnote
Underlying class: Class A Common Stock
Underlying amount: 119,892
Exercise price
Footnotes: F2, F4, F5

BRCB transaction Derivative

LLC Units

Conversion of derivative security

Transaction value
Shares: -119,892
Change %: -0.6%
Price
Shares after: 19,795,412
Date: 15 May 2026
Ownership: See footnote
Underlying class: Class A Common Stock
Underlying amount: 119,892
Exercise price
Footnotes: F2, F4, F5

BRCB transaction Derivative

LLC Units

Conversion of derivative security

Transaction value
Shares: -119,892
Change %: -0.6%
Price
Shares after: 19,795,412
Date: 15 May 2026
Ownership: See footnote
Underlying class: Class A Common Stock
Underlying amount: 119,892
Exercise price
Footnotes: F2, F4, F5

BRCB transaction Derivative

LLC Units

Conversion of derivative security

Transaction value
Shares: -119,892
Change %: -0.6%
Price
Shares after: 19,795,412
Date: 15 May 2026
Ownership: See footnote
Underlying class: Class A Common Stock
Underlying amount: 119,892
Exercise price
Footnotes: F2, F4, F5

BRCB transaction Derivative

LLC Units

Conversion of derivative security

Transaction value
Shares: -119,892
Change %: -0.6%
Price
Shares after: 19,795,412
Date: 15 May 2026
Ownership: See footnote
Underlying class: Class A Common Stock
Underlying amount: 119,892
Exercise price
Footnotes: F2, F4, F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

Consists of (i) 3,514,041 shares of Class B Common Stock held by Cynosure Partners 2020, LP, (ii) 260,660 shares of Class B Common Stock held by Cynosure Partners 2020 PV, LP, (iii) 660,106 shares of Class B Common Stock held by Cynosure Partners 2020 Co-Investment, LLC (for and on behalf Series A members), (iv) 1,247,093 shares of Class B Common Stock held by Cynosure Partners 2020 Co-Investment, LLC (for and on behalf Series B members), and (v) 14,233,404 shares (or 14,113,512 shares, after giving effect to the transaction described in (3) below) of Class B Common Stock held by Cynosure Partners III, LP. The Cynosure Group, LLC, is the manager for, and has sole voting and investment power with respect to, the shares of Class B Common Stock held by each of these entities. Each of the Reporting Persons disclaims beneficial ownership of the securities of the Issuer held directly by any of the other Reporting Persons except to the extent of their pecuniary interest therein.

Footnote F2

Consists of (i) 1,916,012 shares of Class A Common Stock held by Cynosure Partners III Offshore, LP and, after giving effect to the transaction described in (4) below, (ii) 119,892 shares of Class A Common Stock held by Cynosure Partners III, LP. The Cynosure Group, LLC, is the manager for, and has sole voting and investment power with respect to, the shares of Class A Common Stock held by each of these entities. Each of the Reporting Persons disclaims beneficial ownership of the securities of the Issuer held directly by any of the other Reporting Persons except to the extent of their pecuniary interest therein.

Footnote F3

Reflects the cancellation for no consideration of Class B Common Stock in connection with the conversion of LLC Units.

Footnote F4

Reflects the conversion of 119,892 LLC Units into Class A Common Stock on a 1-to-1 basis.

Footnote F5

The LLC Units may be redeemed by the Reporting Person at any time at the option of the holder for shares of Class A Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class B Common Stock will be forfeited in connection with the redemption. The LLC Units have no expiration date.

SEC remarks

Each of the Reporting Persons may be deemed to be a director-by-deputization of the Issuer solely for purposes of Section 16 of the Securities Exchange Act of 1934 by virtue of The Cynosure Group, LLC's current right to nominate an individual to serve on the board of directors of the Issuer (the "Board"), and under which Andrew Braithwaite, a Managing Director of The Cynosure Group, LLC, serves on the Board.