Fund family · SEC Form D record
Thirdbase Opportunity Series ER funds
Thirdbase Opportunity Series ER has 3 vehicles on the SEC Form D record, in 2 numbered generations, filed from 2026 to 2026. The newest is Thirdbase Opportunity LP - Series ER III, first filed Jun 23, 2026.
- Vehicles
- 3
- Numbered generations
- 2
- First filing
- 2026
- Latest filing
- Jun 23, 2026
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 III
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity LP - Series ER IIICIK 2141734 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Fund II
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity LP - Series ER IICIK 2124538 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Unnumbered
1 vehicle · first filed
| Vehicle | Sleeve | First filed | Latest filing | Filing record | SEC |
|---|---|---|---|---|---|
| Thirdbase Opportunity LP - Series ERCIK 2107041 | Sold the stated amount | EDGAR |
Sold to date and investors
Unlock in the terminal (Investor)Questions about the Thirdbase Opportunity Series ER funds
- How many Thirdbase Opportunity Series ER funds are there?
- The SEC Form D record shows 3 vehicles in 2 numbered generations, the earliest filed Feb 9, 2026 and the latest filing on Jun 23, 2026. By generation: Fund III (Thirdbase Opportunity LP - Series ER III, first filed Jun 23, 2026); Fund II (Thirdbase Opportunity LP - Series ER II, first filed Mar 30, 2026).
- What is the latest Thirdbase Opportunity Series ER fund?
- Thirdbase Opportunity LP - Series ER III, which first filed a Form D on Jun 23, 2026. 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 Series ER 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 Series ER 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.