MAINSAIL MANAGEMENT COMPANY, LLC
CIK 1883367 · View on SEC EDGAR ↗
- Portfolio value
- $66.0M
- Positions
- 1
- As of
- Sept. 30, 2025 Data as of Q3 2025
Portfolio value QoQ: -0.1% 13F does not disclose cash
- Top 10 holdings weight
- 100.00%
- Top 25 holdings weight
- 100.00%
- Positions above 1%
- 1
- Effective number of positions
- 1.0
Based on 13F long-equity holdings only (cash, bonds, shorts not disclosed)
Turnover Q3 2025: 0.0% Est. buys $0 · sells $22,073,507
Median holding: 3.0 quarters Tracked Q4 2024–Q3 2025 · 33.3% still held
- New positions
- 0
- Increased
- 0
- Decreased
- 0
- Closed
- 1
On this page
- Performance vs S&P How this manager's 13F portfolio performed against the S&P 500.
- Sector breakdown How the portfolio splits across market sectors.
- Portfolio Every stock this institution reports holding, from its latest 13F.
- Top moves The biggest position increases and decreases this quarter.
- Exited positions Positions the manager fully sold out of last quarter.
Performance vs S&P 500
Annualized: +18.3% · S&P 500: +18.3%
Approximates a buy-and-hold portfolio built from quarterly SEC 13F snapshots. Excludes cash, short positions, options/derivatives, and non-13(f) securities — reflects the disclosed long-equity book only, not total fund AUM. SEC filing lag is up to 45 days; this is not a real-time-copyable timing.
Priceable coverage: 100.0% · Options excluded: 0.0%
Sector breakdown
Full portfolio 1 positions
| Type | Streak | 8Q trend | |||||
|---|---|---|---|---|---|---|---|
| BRLT Brilliant Earth Group, Inc. - Class A Common Stock | $66,029,007 | 100.00% | 31,898,071 | $22,009,669 | |||
| No matches | |||||||
Top movers (QoQ)
| Security | Action | Shares Δ | Value Δ |
|---|---|---|---|
| BRLT | Price move only | +0 | +$22.0M |
Exited positions
Includes corporate events (mergers, delistings) — not all exits are sells
Closed positions reflect 13F reporting changes; for index managers these are often mechanical (delisting, M&A, index rebalancing), not active decisions.