Mainsail Co-Investors III, L.P. — SEC Form 4 filings
SEC reporting owner CIK 1570211. 5 Form 4 filings on record with FilingPulse; latest filed 2026-08-26.
Transaction summary — filings shown
Covers all 5 filings on record, filed 2023-12-21 to 2026-08-26. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 7 legs across 4 filings — 117,700 shares, $296,936 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 23.
- Largest priced transaction: sale of 24,221 shares @ $3.50 ($84,783) in Brilliant Earth Group, Inc., filed 2023-12-29.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| Brilliant Earth Group, Inc. (BRLT) | 10% owner | 5 | — | 7 legs · 117,700 sh · $296,936 | 23 |
Form 4 filings — Mainsail Co-Investors III, L.P.
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-08-26 | 4 | Brilliant Earth Group, Inc. (BRLT) jointly with MAINSAIL GP III, LLC, Mainsail Partners III, L.P., MAINSAIL INCENTIVE PROGRAM, LLC, MAINSAIL MANAGEMENT COMPANY, LLC | Other (J): 16,014 · Other (J): 16,014 (derivative) | EDGAR |
| 2026-08-12 | 4 | Brilliant Earth Group, Inc. (BRLT) jointly with MAINSAIL GP III, LLC, Mainsail Partners III, L.P., MAINSAIL INCENTIVE PROGRAM, LLC, MAINSAIL MANAGEMENT COMPANY, LLC | Conversion (C): 50,000 · Conversion (C): 50,000 · Sale (S): 50,000 @ $1.29 · Conversion (C): 50,000 (derivative) | EDGAR |
| 2025-03-17 | 4 | Brilliant Earth Group, Inc. (BRLT) jointly with MAINSAIL GP III, LLC, Mainsail Partners III, L.P., MAINSAIL INCENTIVE PROGRAM, LLC, MAINSAIL MANAGEMENT COMPANY, LLC | Conversion (C): 2,700 · Conversion (C): 2,700 · Sale (S): 2,700 @ $1.85 · Conversion (C): 2,700 (derivative) | EDGAR |
| 2023-12-29 | 4 | Brilliant Earth Group, Inc. (BRLT) jointly with MAINSAIL GP III, LLC, Mainsail Partners III, L.P., MAINSAIL INCENTIVE PROGRAM, LLC, MAINSAIL MANAGEMENT COMPANY, LLC | Conversion (C): 24,221 · Conversion (C): 24,221 · Sale (S): 24,221 @ $3.50 · Conversion (C): 9,191 · Conversion (C): 9,191 · Sale (S): 9,191 @ $3.52 · +6 more | EDGAR |
| 2023-12-21 | 4 | Brilliant Earth Group, Inc. (BRLT) jointly with MAINSAIL GP III, LLC, Mainsail Partners III, L.P., MAINSAIL INCENTIVE PROGRAM, LLC, MAINSAIL MANAGEMENT COMPANY, LLC | Conversion (C): 15,133 · Conversion (C): 15,133 · Sale (S): 15,133 @ $3.51 · Conversion (C): 8,233 · Conversion (C): 8,233 · Sale (S): 8,233 @ $3.51 · +2 more | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2023-12-20 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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