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William and Flora Hewlett Foundation - Instrumentl 990 Report
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Useful as a funding landscape reference; the Hewlett Foundation has occasionally supported AI ethics and governance work, but this page is primarily a financial/grantmaking data aggregator with limited direct AI safety relevance.
Metadata
Importance: 18/100organizational reportreference
Summary
This page provides IRS Form 990 financial data for the William and Flora Hewlett Foundation, a major private foundation based in Menlo Park, CA with $14.2 billion in assets and $624 million in annual giving. It aggregates grantee data, funding focus areas, and historical financial statistics across multiple years. The foundation funds education, environment, and philanthropic initiatives, with limited direct AI safety focus.
Key Points
- •Total assets of $14.2 billion and total giving of $624 million as of the 2024 IRS 990 filing.
- •Made 1,965 grants in 2024, with award sizes ranging from $50 to $11.8 million.
- •Primary funding areas include education, STEM, renewable energy, and environmental education.
- •Covers 990 filings from 2009 through 2024, providing a long historical record of grantmaking.
- •Hewlett Foundation has funded some AI governance and ethics work, making it a potential funding source for related organizations.
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| Page | Type | Quality |
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| William and Flora Hewlett Foundation | Organization | 55.0 |
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The William and Flora Hewlett Foundation | 990 Report
Foundation Directory
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California
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Menlo Park
The William and Flora Hewlett Foundation | 990 Report
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990 Report
William & Flora Hewlett Foundation - EIN 941655673
Menlo Park, CA - Instrumentl
CONTENTS
The William and Flora Hewlett Foundation, based in Menlo Park, CA, is a private foundation with assets of $14,202,751,280. Their grant-making focuses on Education, Philanthropy, Voluntarism & Grantmaking, and Human Services primarily in California, District Of Columbia, and New York. Typical awards are $50–$11,805,000, with 0 live grant opportunities. Our financial data is sourced from digitized IRS Form 990s and was last updated Mar 8, 2026.
William & Flora Hewlett Foundation's giving, decoded
See who they fund, how much, and how their priorities are shifting based on their latest IRS 990.
See the data
Based on most recent IRS 990 filing (2024)
Questions about this data?
Overview
for William & Flora Hewlett Foundation
Total assets
$14,202,751,280
Total giving
$624,609,380
Average grant amount
Median grant amount
Total assets $14,202,751,280
Total giving $624,609,380
Average grant amount
Median grant amount
Top funding focus areas:
Grants for Science Teachers
Grants for Education Nonprofits
STEM Education Grants
Education Grants
Renewable Energy Grants
Community and School Garden Grants
Environmental Education Grants
Garden Grants for Nonprofits
Explore more active grant opportunities in our database
990 Forms as PDFs
for William & Flora Hewlett Foundation
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2009
Contact Information
for William & Flora Hewlett Foundation
EIN
941655673
Phone
Address
Menlo Park CA, 94025
Website
EIN
941655673
Phone
Address 2121 Sand Hill Road, Menlo Park, CA 94025
Website
Key People
at William & Flora Hewlett Foundation
Title
Name
Chairman
Mariano Florentino Cuellar
Director
Melody Barnes
Director
Alecia Decoudreaux
Key Financial Stats
for William & Flora Hewlett Foundation
Giving
Number of grants
Assets
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