Fund family · SEC Form D record
Thirdbase Opportunity funds
Thirdbase Opportunity has 20 vehicles on the SEC Form D record, in 20 numbered generations, filed from 2022 to 2025. The newest is Thirdbase Opportunity LP - Series XXVI, first filed Feb 7, 2025.
- Vehicles
- 20
- Numbered generations
- 20
- First filing
- 2022
- Latest filing
- Oct 31, 2025
Names, dates and status as filed on SEC EDGAR. A Form D is a notice of an exempt offering; the SEC does not review or approve it. Grouped by name; see the last question below.
Fund XXVI
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity LP - Series XXVICIK 2051799 | No amendment after 13 months | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund XXV
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity LP - Series XXVCIK 2035201 | No amendment after 13 months | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund XXIV
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity LP - Series XXIVCIK 2019651 | Annual amendment overdue | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund XXIII
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity LP - Series XXIIICIK 2090794 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund XXII
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity LP - Series XXIICIK 2090788 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund XXI
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity LP - Series XXICIK 2090786 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund XX
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity LP - Series XXCIK 2086280 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund XIX
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity LP - Series XIXCIK 2086281 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund XVIII
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity LP - Series XVIIICIK 2086282 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund XVII
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity LP - Series XVIICIK 2086283 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund XVI
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity LP - Series XVICIK 2086284 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund XV
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity LP - Series XVCIK 2086285 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund XIV
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity LP - Series XIVCIK 2086286 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund XIII
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity, LP - Series XIIICIK 1931639 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund XII
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity, LP Series XIICIK 1928721 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund XI
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity, LP - Series XICIK 1917855 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund X
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity, LP - Series XCIK 1916534 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund IX
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity IX, LLCCIK 1899526 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund VIII
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity VIII, LLCCIK 1899528 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund VII
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity VII, LLCCIK 1895628 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Questions about the Thirdbase Opportunity funds
- How many Thirdbase Opportunity funds are there?
- The SEC Form D record shows 20 vehicles in 20 numbered generations, the earliest filed Jan 19, 2022 and the latest filing on Oct 31, 2025. By generation: Fund XXVI (Thirdbase Opportunity LP - Series XXVI, first filed Feb 7, 2025); Fund XXV (Thirdbase Opportunity LP - Series XXV, first filed Sep 12, 2024); Fund XXIV (Thirdbase Opportunity LP - Series XXIV, first filed Apr 15, 2024); Fund XXIII (Thirdbase Opportunity LP - Series XXIII, first filed Oct 31, 2025); Fund XXII (Thirdbase Opportunity LP - Series XXII, first filed Oct 31, 2025); Fund XXI (Thirdbase Opportunity LP - Series XXI, first filed Oct 30, 2025); Fund XX (Thirdbase Opportunity LP - Series XX, first filed Sep 22, 2025); Fund XIX (Thirdbase Opportunity LP - Series XIX, first filed Sep 22, 2025); and 12 more.
- What is the latest Thirdbase Opportunity fund?
- Thirdbase Opportunity LP - Series XXVI, which first filed a Form D on Feb 7, 2025. Its own page carries the filed terms, the people named on the form and every filing on EDGAR.
- Who is the adviser to the Thirdbase Opportunity funds?
- AltStreet has not joined a Form ADV adviser to this family's Form D filings. The adviser, if any, appears in each fund's offering documents, which a Form D does not include.
- How much have the Thirdbase Opportunity funds raised?
- Each vehicle reports an amount sold and an investor count on its latest Form D or amendment, and those figures are on each vehicle's entity page. The totals by generation are in the AltStreet Terminal (Investor), where master and parallel sleeves that report one family-wide figure are counted once.
- How does AltStreet group these funds into a family?
- By name: the base name minus the fund number, sleeve letters, jurisdiction and legal form, read from each issuer's Form D (lib/edgar/fundFamilies.ts). 'Fund IV' is generation 4; a vehicle whose name carries no number is listed as unnumbered. It is a name-based grouping, not a statement of common control; the filings on each entity page show the related persons as filed.