The Thomas and Stacey Siebel Foundation
At a glance
This funder does not accept unsolicited applications. The foundation chooses the organisations it funds itself.
Key takeaways
- The foundation makes contributions only to preselected charitable organisations and does not accept unsolicited requests, so a small charity should not send it a cold application; the filing shows no open route to apply.
- Its stated themes are education, homeless and underprivileged people, public health, research and development, and the environment, and the Geographic focus line gives its priority as around the world.
- Its grants are mostly modest: half of its 73 grants to organisations were $100,000 or less, and the median was $100,000, so any request should be sized to that pattern.
- The typical band of $10,000 to $1,000,000 covers about 8 in 10 grants, but that band is not a ceiling, since its largest grant was $50,000,000.
- Repeat giving is limited, with 11% of its grant dollars to organisations in its latest filing going to organisations it had also funded in its two previous filings, so the foundation appears to be relationship-led rather than competitive.
Overview
The Thomas and Stacey Siebel Foundation is a US private foundation based in Redwood City, CA.
What they fund
Profile derived from the foundation's IRS Form 990-PF filings (TY2024, TY2023, TY2022) and web pages about the foundation (gsb.stanford.edu), with every statement checked against those sources. Sources read on 12 October 2026.
Priority Areas
The foundation says it funds projects supporting education, homeless and underprivileged people, public health, research and development around the world. Its mission is to foster programmes and organisations that improve quality of life, the environment and education. Its grant record also shows repeated support for food and shelter services for homeless families and individuals, as well as general operations at a university, a school, a public-policy institute and community emergency-service providers. The record thus includes both broad operating support and funding directed to particular community services. Contributions are made only to preselected charitable organisations, and unsolicited requests are not accepted.
Themes
- Education
- Homeless and underprivileged
- Public health
- Research and development
- Environment
Geographic Focus
Priority: Around the world. (as reported in other published sources)
How to apply
The foundation makes contributions only to preselected charitable organisations and does not accept unsolicited requests.
Application success factors
- Repeat giving: In its TY2024 filing, 11% of its grant dollars to organisations went to organisations it had also funded in its TY2022 or TY2023 filing.
- Grant size: Across its TY2022, TY2023 and TY2024 filings, half of its 73 grants to organisations were $100,000 or less.
Where grants go
From grants to organisations in the foundation’s filings for tax years 2022–2024.
Grant dollars by state
4 other states: <1%
- The largest single recipient received 72% of grant dollars to organisations.
- In tax year 2024, 11% of grant dollars went to organisations The Thomas and Stacey Siebel Foundation had funded in earlier filings.
- No grants were paid directly to organisations outside the US.
- 2% of grant dollars went to intermediaries that regrant to other organisations.
Grants
How much do they typically give?
Share of 22 grants in tax year 2024 by size
Median $116k (tax year 2024)
The largest grants to organisations in the foundation’s latest filing:
- University of Illinois Foundation · To support general operations$50,000,0002024 tax year
- Salvation Army San Francisco · To provide food and shelter to homeless families and individuals in the san francisco area$1,000,0002024 tax year
- Salvation Army Helena · To provide food and shelter to homeless families and individuals in the helena area$1,000,0002024 tax year
- Salvation Army San Jose · To provide food and shelter to homeless families and individuals in the san jose area$1,000,0002024 tax year
- Salvation Army New York City · To provide food and shelter to homeless families and individuals in manhattan$1,000,0002024 tax year
- Salvation Army Great Falls · To provide food and shelter to homeless families and individuals in the great falls area$500,0002024 tax year
- Bob Hoover Academy · To support general operations$320,0002024 tax year
- Siebel Scholars Foundation · To support general operations$315,0002024 tax year
Grants to organisations listed in the foundation’s Form 990-PF filings. Grants to individuals are not shown.
Officers and directors
- Stacey Siebel — Secretary / CFO / Treasurer
- Thomas M Siebel — President
From the latest Form 990-PF filing
3 years of tax filings
| Year | Total expenses | Grants paid | Assets | Filing document |
|---|---|---|---|---|
| 2022 tax year | $8,422,267 | $7,037,977 | $114,993,885 | Filing for 2022 tax year |
| 2023 tax year | $7,394,501 | $6,244,343 | $116,780,977 | Filing for 2023 tax year |
| 2024 tax year | $57,108,769 | $55,963,000 | $69,890,219 | Filing for 2024 tax year |
Figures from the foundation’s IRS Form 990-PF filings. Assets are at fair market value at year end. The document icon links to each year’s filing on ProPublica Nonprofit Explorer.
Sources
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At a glance
Applying to The Thomas and Stacey Siebel Foundation?
Hinchilla drafts your answers around this funder's priorities, using your organisation's own documents.
No credit card required
Contact
- Redwood City, CA
Applying to The Thomas and Stacey Siebel Foundation?
Hinchilla drafts your answers around this funder's priorities, using your organisation's own documents.
No credit card required
Contact
- Redwood City, CA