Winnow
Emerging managerBuilt from this firm's Form D filings. The firm files no SEC adviser report.
- Website
- https://www.winnowfund.com
- HQ
- WI
Winnow is an early-stage venture firm that makes numerous small investments to take equity stakes early. It backs exceptional founders across the Upper Midwest, including its home state of Wisconsin, and targets Wisconsin-based companies raising a first round, with pre-seed investments also evaluated. Its portfolio includes Fenster Analytics, which was acquired in 2025 by Invokation Games, Village, where the fund redeemed its full investment in October 2023, and leysi, whose platform closed in 2024 due to lack of funding.
New fund likely raising soon
The firm's newest fund is 4 to 7 years past its first sale and no newer Form D has been filed.
01 · Says / Does
| Tag | Says | Does |
|---|---|---|
| Stages | Pre-seed, Seed | Not enough dated deals |
| Sectors | Not stated | Not enough dated deals |
| Regions | WI | Not enough dated deals |
Says: what the firm's funds state. Does: from 0 dated deals in the last 24 months.
02 · Fund history
| Fund | Year | Size | Status |
|---|---|---|---|
| Winnow Fund I, L.P. | 2019 | $10.22M (Form D) | Follow-ons only |
03 · People across funds
- Brian Wiegand, Member of Investment Committee of Issuer
Winnow Fund I, L.P. (Named on Form D)
- Ken Johnson, Member of Investment Committee of Issuer
Winnow Fund I, L.P. (Named on Form D)
- Kevin Ladwig
Winnow Fund I, L.P. (Named on Form D)
- Mike Thorson, Member of Investment Committee of Issuer
Winnow Fund I, L.P. (Named on Form D)
- Richelle Martin, Managing Director of General Partner of Issuer
Winnow Fund I, L.P. (Named on Form D)
04 · Recent deals
No dated deals found yet.
05 · Latest from the firm
No news from the firm's website yet.
06 · Sources
- https://www.winnowfund.com
- https://www.winnowfund.com/contact/contact-general/
- https://www.winnowfund.com/
- https://www.winnowfund.com/portfolio/
Fund dates and sizes are from SEC Form D filings.
Last verified: Oct 25, 2026