Wellspring Philanthropic Fund, formerly known as the Matan B'Seter Foundation, is a left-of-center private foundation created in 2001 by three hedge fund billionaires: Andrew Shechtel, David Gelbaum, and C. Frederick Taylor. The foundation operated through a network of donor-advised funds and shell companies, distributing over $2.8 billion in grants to 1,744 recipients across climate, environmenta…