Raising from Longtail Bio? See their portfolio and how founders fare.
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Longtail Bio has 4 venture fund vehicles on file with the SEC, run from Lynnwood, Washington, with first sales running from 2022 to 2026. 4 Form D notices, originals and amendments, have been filed for them, the first on October 6, 2022 and the latest on October 16, 2026. Together they have taken in $916,303 from 77 investor positions, most recently on October 14, 2026. The smallest investment any of them will accept is $999, rising to $2,000.
| Vehicle | Vintage | Target | Closed | Remaining | First sale | Days | Min check | LPs | Status |
|---|---|---|---|---|---|---|---|---|---|
TA-0818 Fund II, a series of Longtail Bio Fund, LP Filing: Form D, October 16, 2026 |
2026 | $64K | $64K | — | October 14, 2026 | 7 | $1K | 12 | fully sold |
AK-0522 Fund I, a series of Longtail Bio Fund, LP Filing: Form D, February 12, 2025 |
2025 | $715K | $715K | — | February 12, 2025 | 616 | $2K | 17 | fully sold |
TE Fund I, a series of Longtail Bio Fund, LP Filing: Form D, October 13, 2022 |
2022 | $43K | $43K | — | October 12, 2022 | 1,470 | $1K | 14 | fully sold |
CL Fund I, a series of Longtail Bio Fund, LP Filing: Form D, October 6, 2022 |
2022 | $95K | $95K | — | September 2, 2022 | 1,510 | $999 | 34 | fully sold |
The filings for these vehicles name 2 people and entities, with the role each filing gives.
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https://mentionfox.com/investors/longtail-bio