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Maxwell Hanrahan Foundation is a private corporation based in SAN FRANCISCO, CA. The foundation received its IRS ruling in 2019. The principal officer is Kim Traynor. It holds total assets of $561.4M. Annual income is reported at $775.2M. Total assets have grown from $25.6M in 2019 to $561.4M in 2024. The foundation is governed by 2 officers and trustees. Tax records are available from 2018 to 2024. Grantmaking is concentrated in California. According to available records, Maxwell Hanrahan Foundation has made 264 grants totaling $21.9M, with a median grant of $10K. Annual giving has grown from $740K in 2020 to $14.3M in 2024. Individual grants have ranged from N/A to $14.3M, with an average award of $83K. The foundation has supported 172 unique organizations. The foundation primarily supports organizations in California, Illinois, Rhode Island, which account for 58% of all grants. Grantmaking reaches organizations across 27 states. Contributions to this foundation are tax-deductible.
The Maxwell/Hanrahan Foundation operates on a fundamentally different premise than most private foundations its size: it does not accept unsolicited grant applications for its flagship award programs. Founded in 2018 by Delle Maxwell and Patrick Hanrahan — a couple with deep ties to Silicon Valley technology and design — the foundation has grown from $25.6M in assets (2019) to more than $561M by 2024, fueled by more than $529M in personal contributions over five years. Annual giving scaled proportionally, from $354,662 in 2019 to $17.5M in 2024.
The foundation's giving philosophy is people-centered at its core. Rather than funding programs or projects in the abstract, the founders deliberately designed a model that identifies and rewards talented individuals — scientists, artisans, teachers, farmers, and conservationists — doing exemplary hands-on work. Their stated mission to "support individual scientists, teachers, conservationists and creators" is not rhetorical; it describes the literal unit of grantmaking. The highest-value awards ($100,000 each, unrestricted) go directly to individuals, not institutions.
For major award programs (Field Biology, Craft, Food, Earth Science), the foundation recruits rotating panels of external field experts who confidentially nominate candidates. Recipients are not informed in advance and cannot self-nominate. For institutional grants — supporting internship programs, fellowship endowments, teacher resource grants, and conservation land projects — the foundation identifies partner organizations directly and extends invitations.
First-time applicants should understand that the path to a Maxwell/Hanrahan grant typically runs through professional reputation, not a proposal portal. The foundation's Submittable platform (themaxwellhanrahanfoundation.submittable.com) hosts occasional open calls for institutional programs, particularly internship pipelines, teacher resource grants, and conservation work. These represent the most accessible entry points for organizations outside the foundation's existing network.
The founders — recognized as Outstanding Philanthropists by AFP Golden Gate in November 2024 — have demonstrated consistent commitment to equity across all seven program areas. Awards consistently prioritize BIPOC practitioners, first-generation field scientists, and underrepresented communities. Organizations aligned with hands-on, field-based learning and inclusion have the strongest natural fit with this funder.
The Maxwell/Hanrahan Foundation's grantmaking reveals a two-tier structure: high-value individual awards and variable-size institutional partnership grants, with total giving of $17.5M in FY2024 and $14.3M in grants paid.
Individual awards anchor the portfolio. Field Biology, Craft, and Food programs each recognize approximately five to six individuals per year at $100,000 each, unrestricted — roughly $1.5–$2M per year flowing directly to practitioners with no reporting restrictions or project parameters. Earth Science follows a similar individual award model.
Institutional grants span a wide range. The largest tracked institutional grant is $700,000 to Rhode Island School of Design for an endowed movement arts fellowship across two grants. Philanthropic Ventures Foundation received $285,000 across three grants for Bay Area teacher programs in environmental science, arts, and technology. UC San Diego (Scripps Institution of Oceanography) received $270,000 across three grants for student fellowships and internships. San Francisco Botanical Garden Society received $250,000 for nursery infrastructure. California Institute of the Arts received $200,000 for IDEA (Inclusion, Diversity, Equity, and Access) faculty development.
Mid-range institutional grants ($30,000–$130,000) support field-based internship programs, conservation operating grants, and scientific illustration internships at institutions including California Academy of Sciences ($132,500 across six grants), Sonoma Land Trust ($130,000), Trust for Public Land ($130,000), and Nature Conservancy California ($115,000). Smaller grants ($10,000–$50,000) fund individual student field experiences, graduate fellowships, and K-12 teacher classroom resources.
Geographically, California dominates: 145 of 264 tracked grants (55%) flow to California-based organizations and individuals, concentrated in the San Francisco Bay Area. Hawaii (14 grants), New York (18 grants), Washington (8 grants), and Massachusetts (7 grants) represent secondary clusters aligned with marine biology, field research institutions, and craft programs.
The foundation's asset base doubled from $315M (FY2023) to $561M (FY2024) on $227M in new personal contributions plus $260M in net investment income. Grants paid grew from $6.6M (2022) to $10.6M (2023) to $14.3M (2024). Applicants should anticipate continued program expansion through 2026.
The five asset-peer foundations in the same range ($554M–$561M in assets) share balance sheet scale but diverge sharply in mission and grantmaking approach.
| Foundation | Assets | Annual Giving | Primary Focus | Application |
|---|---|---|---|---|
| Maxwell/Hanrahan Foundation | $561M | $17.5M | Field biology, craft, food, conservation, teachers | Nomination/invited; limited open calls |
| Scharbauer Foundation | $560M | ~$15–20M | Community grantmaking, Texas-based broad mandate | Open proposals (TX focus) |
| Smith Richardson Foundation | $558M | ~$25M | Public policy, national security, education | LOI process, invited |
| Wadhwani Operating Foundation | $556M | N/A | Economic acceleration, AI workforce development | Partnership/operating model |
| Macmillan Family Foundation | $555M | ~$10M | Education, publishing, arts | Invited proposals |
Maxwell/Hanrahan stands apart in two critical ways. First, it is the only peer foundation in this cohort that makes unrestricted $100,000 awards directly to individual practitioners — all peers fund organizations exclusively. Second, its asset base grew nearly 700% in five years (from $25.6M in 2019 to $561M in 2024), making it one of the fastest-scaling private foundations in the country. The Smith Richardson Foundation has operated since the 1930s; Maxwell/Hanrahan achieved comparable scale in under a decade. The curated nomination model and people-first philosophy are uniquely distinctive among foundations of this size.
2025 was the most active announcement year in the foundation's short history. In July 2025, the foundation released its 2025 Awards in Field Biology, committing $500,000 to five scientists including Natalia Llopis Monferrer, each receiving $100,000 unrestricted for hands-on ecological and biological research. In October 2025, the foundation announced its 2025 Awards in Food, recognizing six recipients including BJ Dennis — chef and one of the only cultural preservationists of Gullah Geechee foodways — and farming partners Maria Gonzalez and Rudy Jimenez of Green Thumb Farms.
The 2025 Craft Awards, administered through United States Artists, named five recipients: Jolie Ngo (ceramics), Kevin Aspaas (Navajo textile and fiber), Neal Thomas (basket making, age 85), Robert K. Mills (Tlingit metalwork and wood), and Teri Greeves (Kiowa beadwork), each receiving $100,000 unrestricted.
In November 2024, founders Delle Maxwell and Patrick Hanrahan received the AFP Golden Gate Chapter's Outstanding Philanthropist Award, recognizing their rapid transformation from personal philanthropy to major institutional grantmaking, including a $20M endowment gift to the Gardens of Golden Gate Park.
Also notable: the foundation awarded $260,000 in two-year capacity building grants to craft guilds through a learning cohort model — an expansion from individual awards toward craft ecosystem infrastructure. The OBFS Research Experience Grant partnership continued into 2025, distributing $15,000 annually to graduate students conducting field research at biological field stations worldwide.
The most important strategic reality for this funder: for individual award programs (Field Biology, Craft, Food, Earth Science), you cannot apply — the path runs through professional reputation, not a portal.
For individual practitioners seeking recognition: - Build relationships within institutions the foundation already funds: California Academy of Sciences, Scripps Institution of Oceanography, National Geographic Society, RISD, and United States Artists are the ecosystem where nominators circulate. - Present at national field biology meetings, craft symposia, and conservation convenings. Nominating panels are drawn from active professionals who attend these gatherings. - Emphasize hands-on, field-based work. The foundation explicitly favors practitioners over theorists. Laboratory-only researchers, gallery-only artists, and desk-based policymakers are unlikely candidates. - Demonstrate underrepresented identity or perspective. Award recipients consistently reflect BIPOC backgrounds, international field contexts, and communities historically excluded from mainstream funding.
For institutional programs: - Check themaxwellhanrahanfoundation.submittable.com monthly for open calls. As of early 2026, no calls were listed, but open cycles do appear periodically. Set a calendar reminder. - Apply through partner intermediaries where programs are active: OBFS (for field station Research Experience Grants, ~$15,000 pool, deadline typically February), Philanthropic Ventures Foundation (Bay Area teacher resource grants), and National Geographic Society (STEM Field Assistant Program nominations). - Craft proposals around student stipends, field immersion experiences, and diversity outcomes — not facility costs or administrative overhead. - Lead with participant demographics. Programs funding BIPOC students, first-generation scientists, and students with financial need consistently receive support across all seven program areas. - Keep initial outreach concise: email info@maxwell-hanrahan.org, attention Kim Traynor, with a one-paragraph program description, participant demographics, and geographic scope. Do not attach a full unsolicited proposal.
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Smallest Grant
N/A
Median Grant
$10K
Average Grant
$28K
Largest Grant
$665K
Based on 81 grants from the most recent 990-PF filing.
Supporting traditional and contemporary craft artists
Expanding representation in creative fields
Field-based earth science work
Hands-on biological research and conservation
Food systems, sustainability, and culinary traditions
Supporting K-12 educators
Environmental conservation and restoration
The Maxwell/Hanrahan Foundation's grantmaking reveals a two-tier structure: high-value individual awards and variable-size institutional partnership grants, with total giving of $17.5M in FY2024 and $14.3M in grants paid. Individual awards anchor the portfolio. Field Biology, Craft, and Food programs each recognize approximately five to six individuals per year at $100,000 each, unrestricted — roughly $1.5–$2M per year flowing directly to practitioners with no reporting restrictions or project p.
Maxwell Hanrahan Foundation has distributed a total of $21.9M across 264 grants. The median grant size is $10K, with an average of $83K. Individual grants have ranged from N/A to $14.3M.
The Maxwell/Hanrahan Foundation operates on a fundamentally different premise than most private foundations its size: it does not accept unsolicited grant applications for its flagship award programs. Founded in 2018 by Delle Maxwell and Patrick Hanrahan — a couple with deep ties to Silicon Valley technology and design — the foundation has grown from $25.6M in assets (2019) to more than $561M by 2024, fueled by more than $529M in personal contributions over five years. Annual giving scaled propo.
Maxwell Hanrahan Foundation is headquartered in SAN FRANCISCO, CA. While based in CA, the foundation distributes grants to organizations across 27 states.
| Name | Title | Compensation | Benefits | Total |
|---|---|---|---|---|
| DELLE MAXWELL | PRESIDENT | $0 | $0 | N/A |
| PATRICK HANRAHAN | SECRETARY & TREASURER | $0 | $0 | N/A |
Total Giving
$17.5M
Total Assets
$561.4M
Fair Market Value
$561.4M
Net Worth
$552.5M
Grants Paid
$14.3M
Contributions
$227.4M
Net Investment Income
$260.5M
Distribution Amount
$19.2M
Total: $338.3M
Total Grants
264
Total Giving
$21.9M
Average Grant
$83K
Median Grant
$10K
Unique Recipients
172
Most Common Grant
$10K
of 2024 grantees were first-time recipients
| Recipient | Location | Amount | Year |
|---|---|---|---|
| Monterey Bay Aquarium Research InstituteTo support the MBARI Summer Internship Program | Moss Landing, CA | $10K | 2022 |
| GRANT PAID - SEE ATTACHMENT ASEE DETAIL ON ATTACHMENT B | SAN FRANCISCO, CA | $14.3M | 2024 |
| United States Artists IncTo support design and administration of the 2023 Maxwell/Hanrahan Awards in Craft | Chicago, IL | $697K | 2022 |
| Rhode Island School Of DesignTo endow a Maxwell/Hanrahan Society of Presidential Fellowship | Providence, RI | $500K | 2022 |
| National Geographic SocietyTo support STEM Field Assistant Program, and Level I and II National Geographic Grants for Explorers engaging in field-based natural science research | Washington, DC | $300K | 2022 |
| Sf Botanical Garden Society At Strybing ArboretumTo support San Francisco Botanical Garden's new nursery | San Francisco, CA | $250K | 2022 |
| California Institute Of The ArtsTo 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 | Valencia, CA | $200K | 2022 |
| Peninsula Open Space TrustTo support the Coyote Valley and Farmland programs | Palo Alto, CA | $150K | 2022 |
| Philanthropic Ventures FoundationTo support 1) Visiting Artist, 2) Excursion and 3) Technology, Engineering and Design Thinking small grants programs for teachers in the Bay Area | Oakland, CA | $130K | 2022 |
| Nature Conservancy - California ChapterTo support Las Piletas acquisition | Sacramento, CA | $100K | 2022 |
| Sonoma Land TrustTo support Community Engagement and Education Programs, the Santa Rosa South East Greenway, and Investing in Nature-Based Solutions | Santa Rosa, CA | $100K | 2022 |
| Richard Coleman2022 Field Biology Award | Honolulu, HI | $100K | 2022 |
| Camille Truong2022 Field Biology Award | St Kilda East | $100K | 2022 |
| Kristina Cockle2022 Field Biology Award | Vancouver | $100K | 2022 |
| Trust For Public LandTo support Trust for Public Land's Bay Area programs and initiatives, and support for the Deer Creek Beach project | Los Angeles, CA | $100K | 2022 |
| Divya Vasudev2022 Field Biology Award | Shillong | $100K | 2022 |
| Holly Lutz2022 Field Biology Award | San Diego, CA | $100K | 2022 |
| California Academy Of SciencesTo support the Thriving California Initiative | San Francisco, CA | $50K | 2022 |
| Point Reyes Bird Obs - Point Blue Conservation SciTo support the Education Program, including STRAW (Students and Teachers Restoring A Watershed), the Community College Conservation Internship Program, and/or intern training | Petaluma, CA | $50K | 2022 |
| Monterey Bay Aquarium FoundationTo support conservation research and education, focused in California | Monterey, CA | $50K | 2022 |
| Hawaiian Islands Land TrustTo support the Mahukona project | Honolulu, HI | $30K | 2022 |
| San Francisco Botanical Garden SocietyTo support the High School Internship Program | San Francisco, CA | $30K | 2022 |
| Polynesian Voyaging SocietyTo support Moananuiakea - A Voyage for the Pacific, and organizational strengthening and leadership development | Honolulu, HI | $30K | 2022 |
| Clarity Educational Productions IncTo support the Parkway for the People project | Berkeley, CA | $25K | 2022 |
| Environmental Grantmakers AssociationTo support the 2022 Environmental Fellows Program | New York, NY | $22K | 2022 |
| The Coral Reef AllianceTo support reducing land-based sources of pollution in Hawaii | San Francisco, CA | $20K | 2022 |
| Coastal QuestTo support the Marine Protected Area (MPA) Outreach and Education Small Grants Program | Berkeley, CA | $20K | 2022 |
| Community InitiativesTo support Latino Outdoors' programs in California | Oakland, CA | $20K | 2022 |
| Craft Emergency Relief Fund IncTo support the "Get Ready" Grant Program that provides grants for the material and studio needs of professional craftspeople | Montpelier, VT | $20K | 2022 |
| Social Good Fund IncTo support Brown Girl Surf's community surf programs and organizational development | Richmond, CA | $20K | 2022 |
| Amah Mutsun Land TrustTo support The Native Stewardship Corps, native plant propagation and restoration, and general operations | Santa Cruz, CA | $20K | 2022 |
| California Native Plant SocietyTo support native plant conservation and biodiversity programs, including 30x30, wildfire resilience and recovery, and community-led science | Sacramento, CA | $20K | 2022 |
| The Center For Cultural InnovationTo support CCI's Quick Grant program that provides funds for California artists to participate in professional development activities | Los Angeles, CA | $20K | 2022 |
| University Of Marylandoffice Of The BursarTo support the University of Maryland Consortium on Race, Gender and Ethnicity | College Park, MD | $17K | 2022 |
| San Francisco Estuary InstituteTo support the Shoreline Resilience focus area and urban green infrastructure projects | Richmond, CA | $15K | 2022 |
| Ten StrandsTo support general operations | San Rafael, CA | $15K | 2022 |
| Outdoor AfroTo support California outdoor leadership and Making Waves programs, and general operations | Oakland, CA | $15K | 2022 |
| Pacific Horticulture SocietyTo support general operations and science communicators | Berkeley, CA | $15K | 2022 |
| Waiorg IncTo support community outreach & education and pilot projects | Honolulu, HI | $15K | 2022 |
| Regents Of The University Of California - Uc DavisTo support the Elkus Ranch Fund | West Sacramento, CA | $15K | 2022 |
| The Trust For Hidden VillaTo support the Hidden Villa Summer Camp and/or Internship Programs | Los Altos Hills, CA | $15K | 2022 |
| Theodore Payne Fd For Wild Flowers & Native PlantsGeneral Support | Sun Valley, CA | $15K | 2022 |
| Young Mens Christian Association Of San FranciscoTo support the Nature Engagement Education Program and Outdoor Education Programs | San Francisco, CA | $15K | 2022 |
| Nature BridgeTo support NatureBridge's California programs | Sausalito, CA | $15K | 2022 |
| Regents Of The University Of Ca At Santa CruzTo support students to attend the CAMINO (The Center to Advance Mentored, Inquiry-based Opportunities) summer internship program, and to present their field-based research at scientific conferences | Santa Cruz, CA | $13K | 2022 |
| New York Botanical GardenTo support undergraduate interns or graduate students to engage in field research along with NYBG botanists | Bronx, NY | $10K | 2022 |
| University Of Hawaii FoundationTo support undergraduate and recent graduate Research Assistantships at the Hawai'i Institute of Marine Biology for one or more students from underrepresented backgrounds | Honolulu, HI | $10K | 2022 |
MENLO PARK, CA
LOS ANGELES, CA
PALO ALTO, CA