Gavin Turner - 24 Aug 2026 Form 4 Insider Report for Brilliant Earth Group, Inc. (BRLT)

Reporting relationship: Director, 10%+ Owner
Issuer ticker: BRLT
Reported as of: 24 Aug 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 26 Aug 2026, 16:15:14 UTC
Prior SEC filing: 12 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Gavin Turner

Key filing fact

Gavin Turner filed Form 4 for Brilliant Earth Group, Inc. (BRLT) on 26 Aug 2026.

Key facts

This page summarizes Gavin Turner's Form 4 filing for Brilliant Earth Group, Inc. (BRLT).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 26 Aug 2026, 16:15.

Change

Previous filing in this sequence was filed on 12 Aug 2026.
Current net transaction value: $0.

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 (1)

CIK 0001883427 Primary reporting owner

TURNER GAVIN

Relationship: Director, 10%+ Owner
Address: C/O MAINSAIL MANAGEMENT COMPANY, LLC, 500 WEST 5TH STREET, SUITE 1100, AUSTIN
Signature: /s/ Gavin Turner
Signature date: 26 Aug 2026

Reported non-derivative transactions

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

BRLT transaction

Class B Common Stock

Other

Transaction value
Shares: +16,014
Change %: +0.05%
Price
Shares after: 31,848,071
Date: 24 Aug 2026
Ownership: See footnotes
Footnotes: F1, F2, F3

Reported derivative securities

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

BRLT transaction Derivative

LLC Units

Other

Transaction value
Shares: +16,014
Change %: +0.05%
Price
Shares after: 31,848,071
Date: 24 Aug 2026
Ownership: See footnotes
Underlying class: Class A Common Stock
Underlying amount: 16,014
Exercise price
Footnotes: F1, F2, F3, F4

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

The reported transaction, which involves a purchase of a limited partner's interest in Mainsail Co-Investors III, L.P. ("MCOI"), may represent a change in the Reporting Person's pecuniary interest in common units of Brilliant Earth, LLC (the "LLC Units") and shares of Class B common stock held by MCOI. For purposes of Section 16(b), such deemed purchase, for an aggregate consideration of $18,096, could be matchable against the sales reported on August 10, 2026, as reported on the Form 4 filed by the Reporting Person on August 12, 2026. Accordingly, the Reporting Person has fully disgorged to the Issuer, the Section 16(b) deemed profit of $2,033.

Footnote F2

Consists of (i) 31,098,704 shares of Class B common stock (and associated LLC Units) held by Mainsail Partners III, L.P. ("MP III"), (ii) 61,823 shares of Class B common stock (and associated LLC Units) held by Mainsail Incentive Program, LLC ("MIP"), and (iii) 687,544 shares of Class B common stock (and associated LLC Units) held by MCOI.

Footnote F3

Mainsail GP III, LLC ("GP III") is the general partner of MP III. MCOI is a co-investment vehicle that invests alongside MP III. GP III is the general partner of MCOI. A three member investment committee of GP III acts by a majority vote, with the Reporting Person possessing a veto right, with respect to the voting and dispositive power of the securities held by MP III and MCOI. Mainsail Management Company, LLC ("MMC") is the managing member of MIP, and the Reporting Person is the sole Manager of MMC. The Reporting Person disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interests therein.

Footnote F4

LLC Units (together with one share of Class B common stock for every LLC Unit) are exchangeable for one share of the Issuer's Class A common stock. The reported LLC Units, which were acquired by the Reporting Person prior to the Issuer's initial public offering, do not expire.