Form
SCHEDULE 13G/A
Passive or exempt beneficial ownership filing.
MAINSAIL MANAGEMENT COMPANY, LLC - 30 Sep 2026 SCHEDULE 13G/A Report for Brilliant Earth Group, Inc. Class A common stock, $0.0001 par value per share (BRLT)
- Filing manager
- MAINSAIL MANAGEMENT COMPANY, LLC
- Reporting owner
- Gavin Turner
- Beneficially owned shares
- 31,848,071 shares
- Large-stake signal
-
Ownership
65%Beneficial ownership of this reported class.
Shares
31,848,071 sharesShares beneficially owned as disclosed.
Event date
30 Sep 2026Date tied to the ownership event or amendment.
Accepted by SEC
06 Nov 2026EDGAR acceptance date.
How to read this large-stake filing
- Schedule 13D/G filings focus on beneficial ownership stakes, not a full portfolio.
- Compare this filing with the holder history and issuer page before treating the percentage as a current position.
- Use amendments to understand whether the disclosed stake increased, decreased, or changed reporting status.
- Class ownership
- 65%
- Symbol
- BRLT
- Shares outstanding
- 49,117,938 shares
- SEC form
- SCHEDULE 13G/A
- Accepted by SEC
- 06 Nov 2026, 18:00:03 UTC
- Event date
- 30 Sep 2026
- Prior SEC filing
- 14 May 2025
- Source filing
- View source filing
Ownership signal
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Subject security
Names, identifiers, and filing context for this profile.
2 source fields
Source evidence
Original filing metadata and source links for verification.
5 source fields
Filing notes and source
Key filing fact
MAINSAIL MANAGEMENT COMPANY, LLC disclosed 65% ownership in Brilliant Earth Group, Inc. Class A common stock, $0.0001 par value per share (BRLT) on 30 Sep 2026.
Key facts
- MAINSAIL MANAGEMENT COMPANY, LLC filed SCHEDULE 13G/A for Brilliant Earth Group, Inc. Class A common stock, $0.0001 par value per share (BRLT).
- Disclosed ownership: 65%.
- Date of event: 30 Sep 2026.
Change
- Disclosed shares changed by -50,000 since the prior disclosure.
- Previous schedule filing date: 14 May 2025.
- Current filing was accepted on 06 Nov 2026, 18:00.
- Disclosed stake changed by -4.01 percentage points.
- Changes between disclosures can reflect transactions, share-count changes or reporting changes; they do not establish a purchase or activist intent.
Research use
- This page turns one Schedule 13D/G filing into a quick large-stake read before the raw reporting-person rows.
- Use the linked SEC filing as the source of truth for ownership percentages, shares, and reporting-party details.
Evidence
Backed by Schedule 13D/13G
View source filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting persons
Disclosed reporting parties (6)
Names, ownership percentages, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.
| Name | Ownership | Shares owned | Sole voting power | Shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Mainsail GP III, LLC | 65% | 31,786,248 | 0 | 31,786,248 | /s/ Gavin Turner | Gavin Turner/Managing Director | |
| Mainsail Partners III, L.P. | 63% | 31,098,704 | 0 | 31,098,704 | /s/ Gavin Turner | Gavin Turner/Managing Director of Mainsail GP III, LLC, its general partner | |
| Mainsail Co-Investors III, L.P. | 1.4% | 687,544 | 0 | 687,544 | /s/ Gavin Turner | Gavin Turner/Managing Director of Mainsail GP III, LLC, its general partner | |
| MAINSAIL INCENTIVE PROGRAM, LLC | 0.13% | 61,823 | 0 | 61,823 | /s/ Gavin Turner | Gavin Turner/Managing Member of Mainsail Management Company Holdings, LLC, the sole manager of Mainsail Management Company, LLC, its managing member | |
| MAINSAIL MANAGEMENT COMPANY, LLC | 0.13% | 61,823 | 0 | 61,823 | /s/ Gavin Turner | Gavin Turner/Managing Member of Mainsail Management Company Holdings, LLC, its sole manager | |
| Gavin Turner | 65% | 31,848,071 | 0 | 31,848,071 | /s/ Gavin Turner | Gavin Turner |
CIK / CUSIP context first