Reporting owner · Q3 2026 · CIK 1570211

Mainsail Co-Investors III, L.P.: insider trades.

Mainsail Co-Investors III, L.P. reported 4 non-derivative transactions on 2 SEC ownership filings in Q3 2026: 0 open-market purchases and 1 sale ($65K), across 1 company.

Transactions
4
Purchases (P)
0
Sales (S)
1
Companies
1
Name as filed
Mainsail Co-Investors III, L.P.

Companies

CompanyRelationshipTransactions
Brilliant Earth Group, Inc. (BRLT)TenPercentOwner4

Transactions

4 non-derivative rows. Shares and prices as filed.
DateCompanyCodeSharesPriceOwned afterFiling
2026-08-24Brilliant Earth Group, Inc.J16,014—31,848,071Form 4
2026-08-10Brilliant Earth Group, Inc.S50,000$1.290Form 4
2026-08-10Brilliant Earth Group, Inc.C50,000—50,000Form 4
2026-08-10Brilliant Earth Group, Inc.C50,000—31,848,071Form 4

Questions

What stock did Mainsail Co-Investors III, L.P. buy or sell?

Mainsail Co-Investors III, L.P. reported 4 non-derivative transactions on 2 SEC ownership filings in Q3 2026: 0 open-market purchases and 1 sale ($65K), across 1 company.

Is Mainsail Co-Investors III, L.P. the same person as other filers with this name?

This page covers SEC CIK 1570211 only. The SEC assigns each reporting owner a CIK, and people with the same name have different CIKs.

Source: SEC Insider Transactions Data Sets, Q3 2026. Reported as filed; we do not assess intent, performance or compliance. All filings for this CIK on SEC.gov.

Plain-text version for agents and LLMs: /insiders/mainsail-co-investors-iii-l-p-1570211.md

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