# WindSail Capital Group

WindSail Capital Group is an Asset Manager based in Boston, United States.

## Overview

- **Organization type:** Asset Manager
- **Headquarters:** Boston, United States
- **Region:** North America
- **Address:** Boston, MA, United States
- **Assets under management:** Undisclosed
- **Website:** windsailcapital.com
- **LinkedIn:** https://www.linkedin.com/company/windsail-capital-group-llc

## Regulatory record

- **CRD number:** 165352
- **SEC file number:** 802-132505
- **Registration status:** ACTIVE
- **Latest Form ADV filing:** 2026-03-11T05:00:00.000Z
- **Reports private funds:** Yes
- **Private funds reported:** 0
- **IAPD record:** https://adviserinfo.sec.gov/firm/summary/165352

## About

WindSail Capital Group is a leading provider of growth capital to companies advancing energy innovation, climate tech, and sustainability. It offers flexible financing solutions that facilitate growth while minimizing dilution, typically as senior secured loans of $2 million to $5 million. The firm has backed 40+ companies across the clean energy economy and focuses on Series A and Series B companies with real commercial traction.

## Sectors

- Energy innovation, climate tech, and sustainability

## People

- Ian Bowles — Managing Director
- Ian Bowles — co-founder and Managing Director
- Matthew O'Rourke — Managing Director
- Michael Rand — Managing Director
- Michael Rand — co-founder and Managing Director
- Andrew Chang — Vice President

## Questions

### What types of capital does WindSail Capital Group provide?

WindSail provides a mix of equity and structured credit. The firm targets venture-stage and growth-stage companies, and it is known for engaging in complex situations where standard venture capital terms are insufficient. This includes structuring non-dilutive or customized capital solutions alongside direct equity investments.

### Does WindSail operate as a venture capital fund or a specialty lender?

WindSail blends characteristics of both. Unlike a pure venture capital fund, it does not limit itself to minority equity positions. It acts as a direct counterparty that can underwrite credit and equity within a single transaction, which allows it to serve companies that fall between traditional venture equity and bank-led debt offerings.

## Related profiles

- [WindRose Health Investors](https://altss.com/profile/windrose-health-investors)
- [Windsong Global](https://altss.com/profile/windsong-global)

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Last updated: 2026-08-11T15:08:32.892Z

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