Insider · CIK 0001883360
Mainsail Gp Iii, LLC
Files at BRLT (Brilliant Earth Group, Inc.). First filing Dec 21, 2023, latest Aug 12, 2026.
In brief
Mainsail Gp Iii, LLC files SEC Form 4 as 10% owner at BRLT (Brilliant Earth Group, Inc.). Since Dec 21, 2023, Mainsail Gp Iii, LLC has reported 0 open-market buys worth $0 and 4 open-market sells worth $297k, the latest filed on Aug 12, 2026.
A track record needs three past buys with six months of prices behind them; Mainsail Gp Iii, LLC has 0, so none is measured yet.
The newest scored trade: sold $64k of BRLT on Aug 10, 2026, filed Aug 12, 2026, scored 55 (moderate). In the last 12 months: 0 buys worth $0 and 1 sell worth $64k.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
BRLT: Brilliant Earth Group, Inc.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 55Moderate | Brilliant Earth Group, Inc. | $64k 50,000 shares | -100% | +24% from low-56% from high | |
| 20Weak | Brilliant Earth Group, Inc. | $5,006 2,700 shares | -100% | - | |
| 31Weak | Brilliant Earth Group, Inc. | $146k 41,634 shares | -172% | +65% from low-39% from high | |
| 29Weak | Brilliant Earth Group, Inc. | $82k 23,366 shares | -154% | +60% from low-41% from high |
Transactions
Every row this insider has filed, 30 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Aug 24, 2026 | BRLT Brilliant Earth Group, Inc. | JOther Class B Common Stockindirect: See footnotes | +16,014 | - | - | 31,848,071 | Aug 26, 2026 |
| Aug 24, 2026 | BRLT Brilliant Earth Group, Inc. | JOther LLC Unitsderivativeindirect: See footnotes | +16,014 | - | - | 31,848,071 | Aug 26, 2026 |
| Aug 10, 2026 | BRLT Brilliant Earth Group, Inc. | CConversion Class B Common Stockindirect: See footnotes | -50,000 | - | - | 31,848,071 | Aug 12, 2026 |
| Aug 10, 2026 | BRLT Brilliant Earth Group, Inc. | CConversion Class A Common Stockindirect: See footnote | +50,000 | - | - | 50,000 | Aug 12, 2026 |
| Aug 10, 2026 | BRLT Brilliant Earth Group, Inc. | SOpen-market sale Class A Common Stockindirect: See footnote | -50,000 | $1.29 | $64k | 0 | Aug 12, 2026 |
| Aug 10, 2026 | BRLT Brilliant Earth Group, Inc. | CConversion LLC Unitsderivativeindirect: See footnotes | -50,000 | - | - | 31,848,071 | Aug 12, 2026 |
| Mar 13, 2025 | BRLT Brilliant Earth Group, Inc. | CConversion Class B Common Stockindirect: See footnotes10b5-1 | -2,700 | - | - | 31,898,071 | Mar 17, 2025 |
| Mar 13, 2025 | BRLT Brilliant Earth Group, Inc. | CConversion Class A Common Stockindirect: See footnote10b5-1 | +2,700 | - | - | 2,700 | Mar 17, 2025 |
| Mar 13, 2025 | BRLT Brilliant Earth Group, Inc. | SOpen-market sale Class A Common Stockindirect: See footnote10b5-1 | -2,700 | $1.85 | $5,006 | 0 | Mar 17, 2025 |
| Mar 13, 2025 | BRLT Brilliant Earth Group, Inc. | CConversion LLC Unitsderivativeindirect: See footnotes10b5-1 | -2,700 | - | - | 31,898,071 | Mar 17, 2025 |
| Dec 27, 2023 | BRLT Brilliant Earth Group, Inc. | CConversion Class B Common Stockindirect: See footnotes10b5-1 | -24,221 | - | - | 31,918,184 | Dec 29, 2023 |
| Dec 27, 2023 | BRLT Brilliant Earth Group, Inc. | CConversion Class A Common Stockindirect: See footnote10b5-1 | +24,221 | - | - | 24,221 | Dec 29, 2023 |
| Dec 27, 2023 | BRLT Brilliant Earth Group, Inc. | SOpen-market sale Class A Common Stockindirect: See footnote10b5-1 | -24,221 | $3.50 | $85k | 0 | Dec 29, 2023 |
| Dec 28, 2023 | BRLT Brilliant Earth Group, Inc. | CConversion Class B Common Stockindirect: See footnotes10b5-1 | -9,191 | - | - | 31,908,993 | Dec 29, 2023 |
| Dec 28, 2023 | BRLT Brilliant Earth Group, Inc. | CConversion Class A Common Stockindirect: See footnote10b5-1 | +9,191 | - | - | 9,191 | Dec 29, 2023 |
| Dec 28, 2023 | BRLT Brilliant Earth Group, Inc. | SOpen-market sale Class A Common Stockindirect: See footnote10b5-1 | -9,191 | $3.52 | $32k | 0 | Dec 29, 2023 |
| Dec 29, 2023 | BRLT Brilliant Earth Group, Inc. | CConversion Class B Common Stockindirect: See footnotes10b5-1 | -8,222 | - | - | 31,900,771 | Dec 29, 2023 |
| Dec 29, 2023 | BRLT Brilliant Earth Group, Inc. | CConversion Class A Common Stockindirect: See footnote10b5-1 | +8,222 | - | - | 8,222 | Dec 29, 2023 |
| Dec 29, 2023 | BRLT Brilliant Earth Group, Inc. | SOpen-market sale Class A Common Stockindirect: See footnote10b5-1 | -8,222 | $3.46 | $28k | 0 | Dec 29, 2023 |
| Dec 27, 2023 | BRLT Brilliant Earth Group, Inc. | CConversion LLC Unitsderivativeindirect: See footnotes10b5-1 | -24,221 | - | - | 31,918,184 | Dec 29, 2023 |
| Dec 28, 2023 | BRLT Brilliant Earth Group, Inc. | CConversion LLC Unitsderivativeindirect: See footnotes10b5-1 | -9,191 | - | - | 31,908,993 | Dec 29, 2023 |
| Dec 29, 2023 | BRLT Brilliant Earth Group, Inc. | CConversion LLC Unitsderivativeindirect: See footnotes10b5-1 | -8,222 | - | - | 31,900,771 | Dec 29, 2023 |
| Dec 19, 2023 | BRLT Brilliant Earth Group, Inc. | CConversion Class B Common Stockindirect: See footnotes10b5-1 | -15,133 | - | - | 31,950,638 | Dec 21, 2023 |
| Dec 19, 2023 | BRLT Brilliant Earth Group, Inc. | CConversion Class A Common Stockindirect: See footnote10b5-1 | +15,133 | - | - | 15,133 | Dec 21, 2023 |
| Dec 19, 2023 | BRLT Brilliant Earth Group, Inc. | SOpen-market sale Class A Common Stockindirect: See footnote10b5-1 | -15,133 | $3.51 | $53k | 0 | Dec 21, 2023 |
| Dec 21, 2023 | BRLT Brilliant Earth Group, Inc. | CConversion Class B Common Stockindirect: See footnotes10b5-1 | -8,233 | - | - | 31,942,405 | Dec 21, 2023 |
| Dec 21, 2023 | BRLT Brilliant Earth Group, Inc. | CConversion Class A Common Stockindirect: See footnote10b5-1 | +8,233 | - | - | 8,233 | Dec 21, 2023 |
| Dec 21, 2023 | BRLT Brilliant Earth Group, Inc. | SOpen-market sale Class A Common Stockindirect: See footnote10b5-1 | -8,233 | $3.51 | $29k | 0 | Dec 21, 2023 |
| Dec 19, 2023 | BRLT Brilliant Earth Group, Inc. | CConversion LLC Unitsderivativeindirect: See footnotes10b5-1 | -15,133 | - | - | 31,950,638 | Dec 21, 2023 |
| Dec 21, 2023 | BRLT Brilliant Earth Group, Inc. | CConversion LLC Unitsderivativeindirect: See footnotes10b5-1 | -8,233 | - | - | 31,942,405 | Dec 21, 2023 |
Questions about Mainsail Gp Iii, LLC
Answered from the filings on this page, as of the latest one.
Is Mainsail Gp Iii, LLC buying or selling?
In the last 12 months Mainsail Gp Iii, LLC reported 0 open-market buys worth $0 and 1 open-market sell worth $64k on SEC Form 4; the latest was sold $64k of BRLT on Aug 10, 2026. Grants, option exercises and tax withholding are not counted.
How did Mainsail Gp Iii, LLC's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Mainsail Gp Iii, LLC has 0.
Where does Mainsail Gp Iii, LLC file Form 4?
Mainsail Gp Iii, LLC has filed Form 4 at BRLT (Brilliant Earth Group, Inc.). A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.