Maxwell/Hanrahan Foundation

Private foundation · EIN 83-2118884 · since 2019maxwell-hanrahan.org·California, District of Columbia, Hawaii, Illinois, Rhode Island·Updated 13 October 2026

At a glance

$14.3M
Annual giving, 2024 tax year
From the Form 990-PF filing
$150 to $30,000
Grant range
From grants in the 990-PF filings
$10,000
Typical grant (median)
159 grants in the latest filing
Invitation only
Unsolicited applications are not accepted

This funder does not accept unsolicited applications. The foundation chooses the organisations it funds itself.

Key takeaways

  • The foundation makes grants by invitation only and does not accept unsolicited requests, so the realistic route in is a connection with one of the external experts or staff who recommend projects, not a cold application.
  • Its interests centre on field-based science, art and craft, teaching and nature protection, with a stated priority for Hawaiʻi, so an organisation whose work fits those themes, and that has a clear link to the place, is the closest match.
  • About 8 in 10 of its 159 grants to organisations fall between $150 and $30,000, and half were $10,000 or less, so a modest request in that range suits its typical grant; its largest grant was about $695,000, which is not a typical ask.
  • The filing gives no timing for decisions, so build the relationship first and do not expect a quick answer.

Overview

Maxwell/Hanrahan Foundation is a US private foundation based in San Francisco, CA.

What they fund

Profile derived from the foundation's IRS Form 990-PF filings (TY2024, TY2023, TY2022) and its website, with every statement checked against those sources. Sources read on 7 October 2026.

Priority Areas

The Foundation supports individual scientists, teachers, conservationists and creators, and makes grants through recommendations from external experts and staff in relevant fields. Its broad interest areas are field-based science, art and craft, teaching, and protection of the natural world. In field biology, it backs hands-on research experiences, including fellowships and internships at US-based research institutions, as well as quick-turnaround support for field biologists facing immediate obstacles. Its Resilient Ecosystems programme supports stewardship, ecosystem restoration, land protection and acquisition, environmental education, access to the outdoors for diverse populations, and community-based science in California and Hawaiʻi. It values curiosity, inclusion, innovation, collaboration and diverse perspectives.

Themes

  • Field-based science
  • Art and craft
  • Teaching
  • Nature protection

Geographic Focus

Priority: Hawaiʻi. From its grants, not stated by the foundation: California; Illinois; Rhode Island; District of Columbia.

How to apply

External experts and staff from relevant fields recommend projects and institutions for funding.

Application success factors

  • Grant size: In its TY2022 filing, half of its 159 grants to organisations were $10,000 or less.

What the foundation says:

  • The Foundation values curiosity, continuous learning, inclusion, innovation and risk-taking, flexibility, collaboration and fun in its work.
  • It considers support for under-represented, diverse groups and people bringing unique perspectives important.

Where grants go

From grants to organisations in the foundation’s filings for tax years 2022–2024.

Grant dollars by state

California44%
Illinois17%
Rhode Island17%
District of Columbia7%
Hawaii3%
New York2%

6 other states: 6%

Outside the US or with no state on the filing: 3%

  • The largest single recipient received 17% of grant dollars to organisations.
  • No grants were paid directly to organisations outside the US.
  • 22% of grant dollars went to intermediaries that regrant to other organisations.

Grants

159 grants in the latest filing analysed · median $10,000

How much do they typically give?

Share of 159 grants in tax year 2022 by size

Under $1k16%
$1k–$2.5k11%
$2.5k–$5k3%
$5k–$10k0%
$10k–$25k58%
$25k–$50k3%
$50k–$100k2%
$100k–$250k4%
$250k–$500k1%
$500k–$1M1%

Median $10,000 (tax year 2022)

The largest grants to organisations in the foundation’s latest filing:

  • United States Artists · To support design and administration of the 2023 Maxwell/Hanrahan Awards in Craft
    $696,9002022 tax year
  • Rhode Island School of Design · To endow a Maxwell/Hanrahan Society of Presidential Fellowship
    $500,0002022 tax year
  • National Geographic Society · To support STEM Field Assistant Program, and Level I and II National Geographic Grants for Explorers engaging in field-based natural science research
    $300,0002022 tax year
  • SF Botanical Garden Society At Strybing Arboretum · To support San Francisco Botanical Garden's new nursery
    $250,0002022 tax year
  • Rhode Island School of Design · To support an expanded understanding of the cultural, social, and visual significance of movement by developing a paid, post-graduate research fellowship program for artists and scholars whose work engages with the study of and experimentation with movement at the intersection of race and culture
    $200,0002022 tax year
  • California Institute of the Arts · To support the expansion of current infrastructure for the Institute's Inclusion, Diversity, Equity, and Access (IDEA) strategy as it relates to faculty development, to support the recruitment and retention of diverse students, faculty, and staff for programs at the intersection of the arts, design, and computer-based technology
    $200,0002022 tax year
  • Peninsula Open Space Trust · To support the Coyote Valley and Farmland programs
    $150,0002022 tax year
  • Philanthropic Ventures Foundation · To support 1) Visiting Artist, 2) Excursion and 3) Technology, Engineering and Design Thinking small grants programs for teachers in the Bay Area
    $130,0002022 tax year

Grants to organisations listed in the foundation’s Form 990-PF filings. Grants to individuals are not shown.

Officers and directors

  • Patrick Hanrahan — Secretary & Treasurer
  • Delle Maxwell — President

From the latest Form 990-PF filing

3 years of tax filings

YearTotal expensesGrants paidAssetsFiling document
2022 tax year$8,328,224$4,622,575$202,514,873Filing for 2022 tax year
2023 tax year$14,880,244$7,975,759$315,052,824Filing for 2023 tax year
2024 tax year$24,644,264$14,280,509$561,446,478Filing 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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