Windward Fund is a 501(c)(3) nonprofit platform for liberal donors that promotes collaboration on conservation movements. The fund connects donors with organizations that promote programs primarily in conservation and climate change.

The Windward Fund often operates alongside its “sister” nonprofits, primarily the 501(c)(4) Sixteen Thirty Fund and 501(c)(3) New Venture Fund, which both provides similar funding and fiscal sponsorship services to center-left advocacy organizations. All three funds are administered by Arabella Advisors, a Washington, D.C.-based philanthropy consulting firm that caters to left-leaning clients. The Hopewell Fund, another 501(c)(3) nonprofit, is also managed by Arabella Advisors and performs similar functions, particularly concerning fiscal sponsorship of other left-of-center groups.