The Trione Foundation concentrates very large gifts to a small set of institutions, splitting its giving between a major public-policy research center and local healthcare capital needs. Grants suggest a preference for institutional, impact-focused support (general operating for a think tank and capital campaign support for a regional hospital).
A defining feature of Trione Foundation’s recent giving is the repeated six-figure support for Hoover Institute at Stanford, paired with major local health and community investments in Santa Rosa. The foundation shows a clear preference for institutional support rather than many small awards, with grants that recur across years and often carry broad purpose language such as general use, general purposes, or capital campaign support. Within that pattern, Santa Rosa Memorial Hospital Founda received capital campaign funding in 2025, while Santa Rosa Community Health’s Dutton Campus appeared in both 2023 and 2025. Those awards sit alongside sizable general-use grants to organizations serving public health, food access, legal aid, housing-related services, and community programming in Sonoma County. The mix suggests a funder that backs established organizations with operating support and targeted capital needs. Arts, conservation, oral history, and education also appear in the record, but usually as named projects or program support rather than broad thematic portfolios. The foundation’s grants point to a local institutional strategy built around a small number of repeat recipients, especially in Santa Rosa and Stanford-linked policy research.
In public-policy research, Trione Foundation gave $300,000 in 2023 and another $300,000 in 2024 to Hoover Institute for general use, then added $100,000 in 2025 for the same purpose. That recurring support makes the policy-research relationship one of the clearest threads in the record. Healthcare and community health are another major area. In 2025, the foundation granted $180,611 to Santa Rosa Memorial Hospital Founda for its capital campaign, and it also supported Santa Rosa Community Health’s Dutton Campus with $166,667 in both 2023 and 2025. Beyond healthcare, the foundation backed food and shelter services with $100,000 to Redwood Empire Food Bank, $100,000 to Redwood Gospel Mission, and $50,000 to St Vincent de Paul in 2025. The foundation also funded environmental education at Pepperwood Preserve with $50,000 in 2025, and underwrote the Santa Rosa Symphony Assoc’s Classical series with $60,000 in 2025.
Trione Foundation’s recent grants cluster around a modest-to-large ticket range: the typical grant size is $2,500 at the 25th percentile, $10,000 at the median, and $45,567 at the 75th percentile. The distribution is pulled upward by a handful of very large awards, including repeated six-figure grants. Recipients do recur across years: Hoover Institute appears in 2023, 2024, and 2025; Santa Rosa Community Health appears in 2023 and 2025; and other organizations also receive repeat support. The foundation is not described as an operating foundation in the data, and it makes no program-related investments.
$2.1M
$12K
$3.8M
$2.1M
Most grants fall between $3K and $46K, with a median of $10K.
25th Percentile
$3K
Median
$10K
75th Percentile
$46K
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Highly concentrated: very few, large grants (two substantial awards to one national think tank plus a single sizable local capital gift); prefers broad-purpose funding (general use) and capital/campaign support; limited distribution and few repeat grantees.
Notable grantees: Hoover Institution (Stanford University), Santa Rosa Memorial Hospital Foundation
Giving is highly concentrated in California, with 90% of grants going to recipients in the HQ state. Santa Rosa is the main recipient city, appearing repeatedly across health, human services, arts, and conservation grantees. Stanford also appears as a recurring recipient location through Hoover Institute, while Petaluma, Sebastopol, and Rohnert Park show up in the Sonoma County network. Outside the immediate Santa Rosa area, the data also includes grants to Concord and Roseville, but the overall pattern remains local.
The foundation’s recent grants emphasize conservative/public policy research, local hospital capital projects, and healthcare infrastructure in Santa Rosa. Additional named areas include senior nutrition, food and shelter services, legal aid, environmental education, classical music underwriting, oral history archives, and community-based support for local Sonoma County organizations.
Yes. Hoover Institute received grants in 2023, 2024, and 2025, all for general use. Santa Rosa Community Health’s Dutton Campus received funding in 2023 and 2025, and several other organizations also show repeat support across years.
The grant-size distribution centers on $2,500 at the 25th percentile, $10,000 at the median, and $45,567 at the 75th percentile. Recent awards also include larger six-figure grants, so the foundation’s giving includes both smaller awards and substantial institutional support.
Its grantmaking is heavily concentrated in California. The data shows 90% of grants going to recipients in the HQ state, and the most frequent recipient city is Santa Rosa, followed by other California locations such as Stanford, Petaluma, Sebastopol, Rohnert Park, Concord, and Roseville.
The recent record shows general use support, general purposes, capital campaign funding, underwriting for the Santa Rosa Symphony’s Classical series, environmental education support at Pepperwood Preserve, and oral history collection support for Museums of Sonoma County. The foundation also funds senior nutrition through the Council on Aging’s Meals on Wheels program.
2026
Source: IRS Form 990-PF, fiscal year 2026.
Most recent grants reported to the IRS.
| Recipient | Location | Amount | Year | Purpose |
|---|---|---|---|---|
| Stanford University | Stanford, CA | $200,000 | 2026 | SIEPR |
| Santa Rosa Memorial Hospital Founda | Santa Rosa, CA | $179,793 | 2026 | Capital campaign |
| Ceres Community Project | Sebastopol, CA | $125,000 | 2026 | General use |
| Redwood Empire Food Bank | Santa Rosa, CA | $110,000 | 2026 | General use |
| COTS | Petaluma, CA | $100,000 | 2026 | General use |
| 10000 Degress | Santa Rosa, CA | $100,000 | 2026 | General use |
| United Way | Santa Rosa, CA | $100,000 | 2026 | General use |
| Redwood Gospel Mission | Santa Rosa, CA | $100,000 | 2026 | General use |
| Children's Museum of Sonoma County | Santa Rosa, CA | $75,000 | 2026 | General purposes |
| Santa Rosa Symphony Assoc | Santa Rosa, CA | $65,000 | 2026 | Underwriting Classical series |
| Canine Companions | Santa Rosa, CA | $65,000 | 2026 | General use |
| Museum of Sonoma County | Santa Rosa, CA | $50,000 | 2026 | Collection of Gay LeBaron oral history of Sonoma County |
| Career Technical Education Foundati | Santa Rosa, CA | $50,000 | 2026 | General use |
| Women's Recovery Services | Santa Rosa, CA | $50,000 | 2026 | General use |
| California Waterfowl Assoc | Roseville, CA | $50,000 | 2026 | General use |
| Tides Center | Los Angeles, CA | $50,000 | 2026 | General use |
| YMCA Sonoma County | Santa Rosa, CA | $50,000 | 2026 | General purpose |
| TLC Child Family Services | Sebastopol, CA | $50,000 | 2026 | General use |
| Laguna de Santa Rosa Foundation | Santa Rosa, CA | $50,000 | 2026 | General use |
| Pepperwood Preserve | Santa Rosa, CA | $50,000 | 2026 | Environmental education |
| St Vincent de Paul | Rohnert Park, CA | $50,000 | 2026 | General use |
| Latinos Unidos del Condado | Santa Rosa, CA | $30,000 | 2026 | Scholarship fund |
| The Living Room | Santa Rosa, CA | $25,000 | 2026 | General purpose |
| Free to Be | Santa Rosa, CA | $25,000 | 2026 | General purposes |
| Sonoma County Library Foundation | Santa Rosa, CA | $25,000 | 2026 | Wine Country from Roseland |
| Marines' Memorial Foundation | San Francisco, CA | $25,000 | 2026 | General use |
| Friends of Trione-Annadel State Par | Kenwood, CA | $23,000 | 2026 | Park improvements |
| Navy Supply Corps Found | Watkinsville, GA | $20,000 | 2026 | Scholarship fund |
| Marian Sisters of Santa Rosa | Santa Rosa, CA | $20,000 | 2026 | General purpose |
| US Navy Memorial Foundation | Washington, DC | $15,000 | 2026 | Lone Sailor Awards |
| Family Justice Center Sonoma County | Santa Rosa, CA | $10,000 | 2026 | General purpose |
| Farm to Pantry | Healdsburg, CA | $10,000 | 2026 | General |
| Cancer Research Institute | New York, NY | $10,000 | 2026 | General purposes |
| Luther Burbank Memorial Foundation | Santa Rosa, CA | $10,000 | 2026 | General use |
| Commandery of St Francis | San Anselmo, CA | $10,000 | 2026 | Wounded Veterans |
| Healdsburg Food Pantry | Healdsburg, CA | $10,000 | 2026 | General purposes |
| Gotalandia Farm Animal Sanctuary an | Sebastopol, CA | $10,000 | 2026 | General use |
| Sonoma County Children's Charities | Santa Rosa, CA | $10,000 | 2026 | General use |
| The Bird Rescue Center | Santa Rosa, CA | $10,000 | 2026 | General purposes |
| Diocese of Santa Rosa | Santa Rosa, CA | $5,000 | 2026 | General purpose |
| Pony Express Equine Assistance | Santa Rosa, CA | $5,000 | 2026 | General use |
| Redwood Empire Council Boy Scouts o | Santa Rosa, CA | $5,000 | 2026 | Promoting Scouting leadership and education |
| Cloverdale Senior Multipurpose Cent | Cloverdale, CA | $5,000 | 2026 | General purpose |
| Belos Cavalos | Kenwood, CA | $5,000 | 2026 | General use |
| Santa Rosa Junior College Foundatio | Santa Rosa, CA | $3,000 | 2026 | Capital campaign |
| Boys Girls Club of Central Sonoma C | Santa Rosa, CA | $2,500 | 2026 | General use |
| Santa Rosa Sunrise Rotary Club | Santa Rosa, CA | $2,000 | 2026 | General use |
| Star of the Valley Church | Santa Rosa, CA | $1,800 | 2026 | General use |
| Strengthen Your Mind Initiative | Assonet, MA | $1,000 | 2026 | General use |
| Proctor Terrace PTA | Santa Rosa, CA | $500 | 2026 | General purposes |
Stanford University
$200,000SIEPR
Santa Rosa Memorial Hospital Founda
$179,793Capital campaign
Ceres Community Project
$125,000General use
10000 Degress
$100,000General use
Santa Rosa Symphony Assoc
$65,000Underwriting Classical series
Museum of Sonoma County
$50,000Collection of Gay LeBaron oral history of Sonoma County
Career Technical Education Foundati
$50,000General use
Women's Recovery Services
$50,000General use
California Waterfowl Assoc
$50,000General use
YMCA Sonoma County
$50,000General purpose
Pepperwood Preserve
$50,000Environmental education
St Vincent de Paul
$50,000General use
Latinos Unidos del Condado
$30,000Scholarship fund
The Living Room
$25,000General purpose
Free to Be
$25,000General purposes
Sonoma County Library Foundation
$25,000Wine Country from Roseland
Friends of Trione-Annadel State Par
$23,000Park improvements
Navy Supply Corps Found
$20,000Scholarship fund
Marian Sisters of Santa Rosa
$20,000General purpose
US Navy Memorial Foundation
$15,000Lone Sailor Awards
Family Justice Center Sonoma County
$10,000General purpose
Commandery of St Francis
$10,000Wounded Veterans
Healdsburg Food Pantry
$10,000General purposes
Gotalandia Farm Animal Sanctuary an
$10,000General use
Sonoma County Children's Charities
$10,000General use
The Bird Rescue Center
$10,000General purposes
Diocese of Santa Rosa
$5,000General purpose
Pony Express Equine Assistance
$5,000General use
Redwood Empire Council Boy Scouts o
$5,000Promoting Scouting leadership and education
Cloverdale Senior Multipurpose Cent
$5,000General purpose
Belos Cavalos
$5,000General use
Santa Rosa Junior College Foundatio
$3,000Capital campaign
Santa Rosa Sunrise Rotary Club
$2,000General use
Star of the Valley Church
$1,800General use
Strengthen Your Mind Initiative
$1,000General use
Proctor Terrace PTA
$500General purposes