Mainsail Management Company, LLC

In its 13F for Q3 2024 (holdings as of September 30, 2024, filed November 13, 2024), Mainsail Management Company, LLC reported 2 stock positions worth $69.3 million. Its top holding was Brilliant Earth Class A (BRLT) at 98.5% of the portfolio, followed by Soundthinking (SSTI, 1.5%). Its holdings were unchanged from Q2 2024.

Most Recent 13F
Q3 2025
Location
AUSTIN, TX
CIK
0001883367
Portfolio Value
$69.3M (Q3 2024)
SEC Filing
0001883367-24-000003 ↗ filed Nov 13, 2024

Holdings Value

0$50.0M$100.0M$150.0M Q1 2024: $96.8M Q1 2024 Q2 2024: $71.9M Q2 2024 Q3 2024: $69.3M $69.3M Q3 2024 Q4 2024: $103.5M Q4 2024 Q1 2025: $84.6M Q1 2025 Q2 2025: $66.1M Q2 2025 Q3 2025: $66.0M Q3 2025

Holdings 2 stocks · $69.3M
BRLT Brilliant Earth Group Inc. Class A 98.46% 31,900,771 $68.3M No change
SSTI Soundthinking Inc. 1.54% 91,939 $1.1M No change

Portfolio Sells Q2 2024 → Q3 2024
None this quarter.

Portfolio Buys Q2 2024 → Q3 2024
None this quarter.

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q3 2025 1$66.0MBRLT
Q2 2025 2$66.1MBRLT, TTAN
Q1 2025 3$84.6MBRLT, TTAN, SSTI
Q4 2024Amended 3$103.5MBRLT, TTAN, SSTI
Q3 2024 2$69.3MBRLT, SSTI
Q2 2024 2$71.9MBRLT, SSTI
Q1 2024 2$96.8MBRLT, SSTI