Bios Fund
Bios Fund last closed a fund in May 2022 — 54 months ago.
It raises on several lines, too close together for one rhythm. No month is guessed; the filing will say.
Late-cycle This firm is deep enough into its last fund that a new one would not be a surprise.
- Funds on file
- 8
- Capital raised
- $317M
- Latest close
- May 2022
- Based in
- TX
Vehicles on file
| Vehicle | First close | Amount | Filings |
|---|---|---|---|
| Bios Special Opportunity Fund II, LP | May 2022 | $7M | 0001972515 ↗ |
| Bios Special Opportunity Fund, LP | March 2022 | $35M | 0001916388 ↗ |
| BIOS Fund III NT, LP | December 2019 | $100M | 0001791910 ↗ |
| BIOS Fund III, LP | December 2019 | $100M | 0001791917 ↗ |
| BIOS Fund II NT, LP | January 2018 | $2M | 0001728851 ↗ |
| BIOS Fund II, LP | September 2017 | $50M | 0001714576 ↗ |
| BIOS Fund I, LP | March 2017 | $14M | 0001697316 ↗ |
| BIOS Fund I QP, LP | March 2017 | $8M | 0001700297 ↗ |
| BIOS Fund III QP, LP | December 2019 | $100M | 0001791916 ↗ |
| BIOS Fund II QP, LP | September 2017 | $50M | 0001716869 ↗ |
Each row links to that vehicle’s Form D filings on EDGAR — the name, date and amount above should match what is filed there.
Named on filings
Aaron Fletcher
What Bios Fund invests in
- Typical fund
- $35M median, seed to early stage
- Says it invests in
- health/bio
- Website
- biospartners.com
Sector and stage are quoted from the firm’s own website, not inferred, and dated.
Service providers
- Fund administrator
- Bios (6 funds)
- Auditor
- Weaver (6 funds)
From Form ADV filed by STEELHEAD CAPITAL MANAGEMENT, LLC CRD 173440 ↗, latest filing March 2026, covering 6 funds linked to this firm by Form D file number. Form ADV is filed once a year, so a provider may have changed since. How this is matched.
What this is. Every figure on this page comes from Form D filings with the U.S. Securities and Exchange Commission — public records, reproduced here as filed. Service providers, where shown, come from the adviser’s Form ADV and are dated.
What it is not. Single-deal SPVs, feeder vehicles and GP or employee commitment funds are listed but excluded from fund counts and capital totals: an SPV is one investment, a feeder holds the same capital as its master, and a “Principals” or “Entrepreneurs” fund closes alongside a main fund rather than being raised in its own right. Capital deployed from a family office, a corporate balance sheet or an evergreen structure never arrives as a fund close, so a firm doing that looks quiet here. Amounts are as of the last amendment and go stale. Dates are the date of first sale — a fund's first close, not its final one. Funds filed as “Indefinite” are excluded from totals rather than counted as zero, so a total is a floor.
“No recent fund” is a statement about filings. It is not a statement about whether a firm is solvent, investing, or still in business.