Directory — Venture Capital
Winnow
Madison-based venture manager; 1 fund on file with the SEC (2021).
Winnow is a venture manager headquartered in Madison, WI. This profile is built from the firm’s own filings with the Securities and Exchange Commission.
Filed vehicles
| Fund | Form D filed | Amount reported sold |
|---|---|---|
| Winnow Fund I, L.P. | 2021-01-19 | $10.2M |
Across 1 filed vehicle, $10.2M in aggregate has been reported as sold on Form D.
What this entry does not establish
A Form D filing tells you that a fund exists, where it is located, what it calls itself, and how much it reported raising. It does not establish check size, sector focus, stage, current assets under management, or whether the fund is still actively deploying. Those fields are left empty here rather than estimated.
The WI tag reflects where the manager is headquartered, not a confirmed investment mandate.
If you are with this firm and want the profile completed or corrected, tell us — we will update it and mark it confirmed.
On the record
Team
| Name | Title |
|---|---|
| Richelle Martin | Managing Director of General Partner of Issuer |
| Brian Wiegand | Member of Investment Committee of Issuer |
| Ken Johnson | Member of Investment Committee of Issuer |
| Mike Thorson | Member of Investment Committee of Issuer |
| Kevin Ladwig | Director |
Sources
- SEC Form D — Winnow Fund I, L.P., filed 2021-01-19 — retrieved August 7, 2026
Entry last verified August 7, 2026. Suggest a correction