Brilliant Earth Group Inc. (BRLT) Insider Trading

Cluster buy

3 insiders bought $39k of their own stock in 7 days.

Open-market purchases by executives and directors between Aug 13 and Aug 19. Buying is rarer than selling and says more, but it is one input, not a verdict.

Net open-market

−$136k

3 buys · 6 sales

Under a 10b5-1 plan

63%

of the value sold

Insiders who bought / sold

3 / 3

executives and directors

Last open-market buy

Aug 2026

Aug 19, 2026

Get an email when BRLT's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Aug 18 – 19	Beth Tamara Gerstein Chief Executive Officer	Bought 2 parts	10,000	$1.25 average	$13k	New	Form 4
Aug 18 – 19	Eric Scott Grossberg Executive Chairman	Bought 2 parts	10,000	$1.27 average	$13k	New	Form 4
Aug 17	Sharon Dziesietnik Chief Operations Officer	Sold10b5-1 plan	10,124	$1.27	$13k	1.9%	Form 4
Aug 13	Jeffrey Chuenhong Kuo Chief Financial Officer	Bought	10,000	$1.36	$14k	1.5%	Form 4
Aug 10	Mainsail Partners Iii, L.p. Large holder	SoldNo plan	50,000	$1.29	$65k	0.2%	Form 4
Aug 10	Gavin Turner Director	SoldNo plan	50,000	$1.29	$65k	0.2%	Form 4
Jun 18 – 22	Jennifer Noel Harris Director	Sold10b5-1 plan 2 parts	38,356	$1.05 average	$40k	15%	Form 4
May 18	Sharon Dziesietnik Chief Operations Officer	Sold10b5-1 plan	10,124	$1.15	$12k	1.8%	Form 4
Feb 18	Sharon Dziesietnik Chief Operations Officer	Sold10b5-1 plan	19,687	$1.37	$27k	4.2%	Form 4
Nov 17, 2025	Sharon Dziesietnik Chief Operations Officer	Sold10b5-1 plan	9,191	$1.99	$18k	1.9%	Form 4
Jun 16, 2025 – Jun 18, 2025	Jennifer Noel Harris Director	Sold10b5-1 plan 3 parts	15,382	$1.36 average	$21k	15%	Form 4
May 16, 2025	Sharon Dziesietnik Chief Operations Officer	Sold10b5-1 plan	9,190	$1.40	$13k	1.9%	Form 4
Mar 13, 2025	Mainsail Partners Iii, L.p. Large holder	Sold10b5-1 plan	2,700	$1.85	$5k	<0.1%	Form 4
Mar 13, 2025	Gavin Turner Director	Sold10b5-1 plan	2,700	$1.85	$5k	<0.1%	Form 4
Feb 18, 2025	Jeffrey Chuenhong Kuo Chief Financial Officer	Sold10b5-1 plan	31,708	$1.52	$48k	6.6%	Form 4
Feb 18, 2025	Sharon Dziesietnik Chief Operations Officer	Sold10b5-1 plan	20,792	$1.50	$31k	5.3%	Form 4
Dec 13, 2024	Sharon Dziesietnik Chief Operations Officer	Sold10b5-1 plan	5,324	$1.96	$10k	1.3%	Form 4
Nov 18, 2024	Jeffrey Chuenhong Kuo Chief Financial Officer	Sold10b5-1 plan	9,134	$1.64	$15k	1.9%	Form 4

Aug 18 – 19
Beth Tamara Gerstein
Chief Executive Officer · bought 10,000 at avg $1.25
$13k
New position
Aug 18 – 19
Eric Scott Grossberg
Executive Chairman · bought 10,000 at avg $1.27
$13k
New position
Aug 1710b5-1 plan
Sharon Dziesietnik
Chief Operations Officer · sold 10,124 at $1.27
$13k
1.9% of stake
Aug 13
Jeffrey Chuenhong Kuo
Chief Financial Officer · bought 10,000 at $1.36
$14k
1.5% of stake
Aug 10No plan
Mainsail Partners Iii, L.p.
Large holder · sold 50,000 at $1.29
$65k
0.2% of stake
Aug 10No plan
Gavin Turner
Director · sold 50,000 at $1.29
$65k
0.2% of stake
Jun 18 – 2210b5-1 plan
Jennifer Noel Harris
Director · sold 38,356 at avg $1.05
$40k
15% of stake
May 1810b5-1 plan
Sharon Dziesietnik
Chief Operations Officer · sold 10,124 at $1.15
$12k
1.8% of stake
Feb 1810b5-1 plan
Sharon Dziesietnik
Chief Operations Officer · sold 19,687 at $1.37
$27k
4.2% of stake
Nov 17, 202510b5-1 plan
Sharon Dziesietnik
Chief Operations Officer · sold 9,191 at $1.99
$18k
1.9% of stake
Jun 16, 2025 – Jun 18, 202510b5-1 plan
Jennifer Noel Harris
Director · sold 15,382 at avg $1.36
$21k
15% of stake
May 16, 202510b5-1 plan
Sharon Dziesietnik
Chief Operations Officer · sold 9,190 at $1.40
$13k
1.9% of stake
Mar 13, 202510b5-1 plan
Mainsail Partners Iii, L.p.
Large holder · sold 2,700 at $1.85
$5k
<0.1% of stake
Mar 13, 202510b5-1 plan
Gavin Turner
Director · sold 2,700 at $1.85
$5k
<0.1% of stake
Feb 18, 202510b5-1 plan
Jeffrey Chuenhong Kuo
Chief Financial Officer · sold 31,708 at $1.52
$48k
6.6% of stake
Feb 18, 202510b5-1 plan
Sharon Dziesietnik
Chief Operations Officer · sold 20,792 at $1.50
$31k
5.3% of stake
Dec 13, 202410b5-1 plan
Sharon Dziesietnik
Chief Operations Officer · sold 5,324 at $1.96
$10k
1.3% of stake
Nov 18, 202410b5-1 plan
Jeffrey Chuenhong Kuo
Chief Financial Officer · sold 9,134 at $1.64
$15k
1.9% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch BRLT, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Spot a number that looks wrong? Check it in BRLT's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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