Thirdbase Opportunity, LP - Series X
Thirdbase Capital · adviser of record: Thirdbase Capital GP, LLC · 2021 vintage
Thirdbase Opportunity, LP - Series X is a 2021 venture fund managed by Thirdbase Capital, with $532k raised (Form D, amount sold). It reported $520k in gross assets at year-end 2025, 0.98x its size, against a peak of $1mm in 2021.
- Latest value held
- $520k year-end 2025
- Peak
- $1mm year-end 2021
- Fund size
- $532k Form D, amount sold
- Held vs. size
- 0.98x peak 1.88x
Value held by year-end
Gross asset value reported on Form ADV at each year-end. Dashed line: fund size. Open in the Fund Tracker
| Year-end | Gross assets | ÷ size | Change |
|---|---|---|---|
| 2025 | $520k | 0.98x | -48% over 2 yrs |
| 2023 | $1mm | 1.88x | +0% |
| 2022 | $1mm | 1.88x | +0% |
| 2021 | $1mm | 1.88x | – |
Other funds from Thirdbase Capital
- Thirdbase Opportunity, LP - Series XI 2022
- Thirdbase Opportunity, LP Series XII 2022
- Thirdbase B SD Opportunity, LLC 2021
- Thirdbase Pipe SB II, LLC 2021
- Thirdbase Opportunity Cov, LLC 2021
About these numbers
Gross asset value is what the manager reports holding in the fund at each fiscal year-end, on SEC Form ADV, Schedule D. It includes the GP’s own commitment and is before carried interest, so it is not the LPs’ net return, and it does not show cash already distributed. A fall in value can mean distributions, markdowns or both. Fund size is the amount sold reported on Form D, which for some funds reflects only a first close. Private fund ID 805-5347494733. Data updated October 13, 2026.
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