# The Thomas and Stacey Siebel Foundation

The Thomas and Stacey Siebel Foundation is an Endowment / Foundation based in Redwood City, United States.

## Overview

- **Organization type:** Endowment / Foundation
- **Headquarters:** Redwood City, United States
- **Region:** North America
- **Address:** Redwood City, CA, United States
- **Founded:** 1996
- **Assets under management:** Undisclosed
- **Website:** siebelfoundation.org
- **LinkedIn:** https://www.linkedin.com/company/thomas-and-stacey-siebel-foundation

## Regulatory record

- **Reports private funds:** No

## About

Thomas and Stacey Siebel established their eponymous foundation in 1996, the same year Siebel Systems went public. The wealth originates from Siebel Systems, which dominated the customer relationship management market before a $5.8 billion acquisition by Oracle in 2006. The foundation operates from Redwood City, California, with a grantmaking focus on homelessness, at-risk youth, education, public health, and alternative energy solutions. The foundation's known grantmaking vehicles include the Siebel Scholars program, which funds graduate students at top universities in business, computer science, and bioengineering, and the Montana Meth Project, a large-scale substance-abuse prevention effort. While its public filings describe a short-term investment fund, the foundation does not disclose specific portfolio positions. Its geographic footprint centers on California and Montana, where the Siebels maintain significant real estate and agribusiness operations, including the Dearborn Ranch near Wolf Creek and the N Bar Ranch in Grass Range. Total assets are not publicly disclosed by the foundation. The foundation also overlaps with Siebel's other ventures, including the Siebel Scholars Foundation and his role as a director of the Hoover Institution. Thomas Siebel is an elected member of the American Academy of Arts and Sciences. The foundation's structural distinctiveness lies in its deep integration with the Siebel family's Montana land holdings and operating ranches, blending traditional philanthropy with large-scale agribusiness management. This convergence of a Silicon Valley fortune with a substantial physical-asset footprint in the Northern Rockies creates an unusual capital base not typically seen in tech-founder foundations.

## Sectors

- Education
- Energy Transition & Renewables
- Healthcare Services

## People

- Thomas M. Siebel — Founder
- Stacey Siebel — Co-Founder

## Questions

### Which sectors does the foundation explicitly avoid?

While no explicit negative sector screen is published, the foundation's stated priorities suggest an affirmative focus on education, public health, the environment, and solutions for homelessness and underprivileged communities. There is no public indication of investments in extractive industries or defense technology.

## Related profiles

- [The Dalton School](https://altss.com/profile/the-dalton-school)
- [Lake Forest College Endowment](https://altss.com/profile/lake-forest-college-endowment)

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Last updated: 2026-06-03T20:00:00.000Z

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