Brilliant Earth Group, Inc. - Class A common stock, $0.0001 par value per share (BRLT)

Q: What does CUSIP 109504100 represent in this 13F holders report?

CUSIP 109504100 is the security identifier for BRLT - Brilliant Earth Group, Inc. - Class A common stock, $0.0001 par value per share used to aggregate holder disclosures.

Q: How many institutions held BRLT - Brilliant Earth Group, Inc. - Class A common stock, $0.0001 par value per share in Q3 2026?

4 institutional investors reported BRLT - Brilliant Earth Group, Inc. - Class A common stock, $0.0001 par value per share for Q3 2026. Use the holders table for investor-level position and value details.

CUSIP: 109504100

Q3 2026 13F Holders as of 30 Sep 2026

Security type / class: Equity / Class A common stock, $0.0001 par value per share
Total 13F shares: 46,905
Total 13F value: $62,381
Share change: +27,321
SEC-reported price per share: $1.33
Number of holders: 4
Value change: +$36,357
Number of buys: 2
Number of sells: 1
Shares outstanding: 49,117,938

Security key

109504100

Report period

Q3 2026

Institutions

Top holders

BRLT full security history Ownership snapshot Full 13F holder table Previous quarter: Q1 2026 Brilliant Earth Group, Inc. SEC filings Brilliant Earth Group, Inc. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 109504100

Previous quarter: Q1 2026

Recent filing periods:

Q3 2026 Q1 2026

Ownership snapshot

Top reported holders of BRLT - Brilliant Earth Group, Inc. - Class A common stock, $0.0001 par value per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

MAINSAIL MANAGEMENT COMPA...

Disclosed value leader

Beth Tamara Gerstein

Comparable rows

2/15

Latest evidence

30 Sep 2026

13D/G 3/4/5 13F Lead comparable stake: 65% 13 rows are not safely comparable across share classes. 13D/G row: MAINSAIL MANAGEMENT COMPANY, LLC Showing 1-6 of 15 holder rows.

Quick read

MAINSAIL MANAGEMENT COMPANY, LLC leads the comparable SEC ownership view at 65%.

2 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens MAINSAIL MANAGEMENT COMPANY, LLC's linked filing trail.

Comparable ownership Top 2

MAINSAIL MANAGEMENT COMPANY, LLC 65%

Capital World Investors 6.4%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
MAINSAIL MANAGEMENT COMPANY, LLC	13D/G 3/4/5 Gavin Turner · 10%+ Owner 13D/G 3/4/5	65% Reported 13D/G · 30 Sep 2026	$46,498,184 31,848,071 shares	-$73,000	30 Sep 2026
Capital World Investors	13D/G 13F Company 13D/G 13F	6.4% Reported 13D/G · 31 Mar 2025	$1,450,564 929,849 shares	$0	31 Mar 2025
Beth Tamara Gerstein	3/4/5 Chief Executive Officer, Director, 10%+ Owner 3/4/5	— mixed-class rows	$186,177,309 98,249,952 shares mixed-class rows	+$12,532	18 Aug 2026
Eric Scott Grossberg	3/4/5 Executive Chairman, Director, 10%+ Owner 3/4/5	— mixed-class rows	$186,177,309 98,249,952 shares mixed-class rows	+$12,696	18 Aug 2026
Just Rocks, Inc.	3/4/5 10%+ Owner 3/4/5	— mixed-class rows	$186,164,709 98,239,952 shares mixed-class rows	—	14 Feb 2022
MAINSAIL GP III, LLC	3/4/5 10%+ Owner 3/4/5	— mixed-class rows	$59,142,213 63,696,142 shares mixed-class rows	-$64,350	24 Aug 2026

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q3 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

46,905

Rows available

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q3 2026 vs Q1 2026 Across Filers

Q1 2026 holders

Q3 2026 holders

Holder diff

-31

Investor	Q1 2026 Shares	Q3 2026 Shares	Share Diff	Share Chg %	Q1 2026 value	Q3 2026 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend