Heising-Simons Foundation

Heising-Simons Foundation
Formation2007
TypePrivate foundation
HeadquartersLos Altos, CA
Key people
Liz Simons, Mark Heising, Caitlin Heising
Disbursements$1.456 billion (2007-2025)
Websitehttps://www.hsfoundation.org/

The Heising-Simons Foundation is a private foundation established by philanthropists Elizabeth (Liz) Simons and Mark Heising in Los Altos, California in 2007. Liz Simons and Mark Heising signed the Giving Pledge in 2016.

The Heising-Simons Foundation's main areas of work include early childhood education, science, climate and clean energy, community and opportunity, and human rights. It also funds a science fellowship known as the 51 Pegasi b Fellowship, and the American Mosaic Journalism Prize. It does not accept unsolicited grant proposals.

As of January 1, 2026, the Heising-Simons Foundation's President and CEO is Brian Eule.