Skip to content
Plinth
Foundation Dossiers
Plinth

· Private foundation

The Vadasz Family Foundation

Its FY2025 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$1.6M
Granted FY2025still arriving
54
Grants FY2025still arriving
3
States reached
$150k
Largest
01What you fundRead
02The needRead
03Your edgeRead
04Your fieldRead
01What you fund
0197% classified

What you funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2017–2025.

Health$3.6MArts & Culture$3.6MEducation$3.5MYouth Development$1.6MFood & Nutrition$972kHuman Services$867kEnvironment$275kPhilanthropy$255kOther$0
02FY2025 · 54 grants

Where the money goes

Your grants by size, and where they go.

By grant size · FY2025

  • Under $10k15 grants · $50k
  • $10k–50k27 grants · $423k
  • $50k–250k12 grants · $1.1M
$10,000
Median grant
3
States reached
$9.4M
Total assets
Largest grants
RecipientAmount
Sonoma Valley Hospital Foundation$150,000
Sonoma Family Meal$150,000
Sonoma Valley Education Foundation$143,000
Transcendence Theatre Company$132,000
Sonoma Valley Education Foundation$120,000
Boys and Girls Club of Sonoma Valle$100,000
Sonoma Valley Mentoring Alliance$70,000
Redwood Empire Food Bank$50,000
Sonoma Valley Authors Festival$50,000
Jack London Park Partners$50,000
Planned Parenthood Mar Monte$50,000
Vivo$50,000
Art Escape$40,000
Sonoma Community Center$40,000
Work On Climate$35,000
02The need
03

Do your dollars go where the need is?

Each grant placed by the hardship in its grantee’s ZIP, then read against the area’s typical level.

show:

Your human-services grants (FY17–25, $1.1M) land where the poverty rate runs at 9%, against an area that typically sits at 9%. 0% of those dollars go to grantees based in above-average-need neighborhoods. Your grants skew toward lower-need ZIPs.

area typical 9%MarinLINK: $50k → 8%MarinLINK: $50k → 8%MarinLINK: $50k → 8%MarinLINK: $4k → 8%Vintage House: $85k → 9%Vintage House: $80k → 9%Vintage House: $80k → 9%Vintage House: $60k → 9%La Luz Center: $50k → 9%Sonoma Community Center: $40k → 9%Sonoma Community Center: $40k → 9%Sonoma Community Center: $39k → 9%Sonoma Immigrant Services: $30k → 9%Sonoma Immigrant Services: $30k → 9%Sonoma Community Center: $25k → 9%La Luz Center: $25k → 9%Sonoma Community Center: $25k → 9%Sonoma Community Center: $25k → 9%La Luz Center: $25k → 9%La Luz Center: $20k → 9%Sonoma Community Center: $12k → 9%Sonoma Community Center: $11k → 9%Vintage House: $10k → 9%Sonoma Community Center: $10k → 9%La Luz Center: $10k → 9%La Luz Center: $10k → 9%Vintage House: $10k → 9%La Luz Center: $10k → 9%Vintage House: $10k → 9%Sonoma Community Center: $10k → 9%Sonoma Community Center: $10k → 9%La Luz Center: $10k → 9%La Luz Center: $10k → 9%Sonoma Community Center: $10k → 9%Vintage House: $10k → 9%La Luz Center: $10k → 9%Sonoma Community Center: $10k → 9%Vintage House: $10k → 9%Sonoma Community Center: $10k → 9%Sonoma Community Center: $10k → 9%Sonoma Community Center: $9k → 9%La Luz Center: $8k → 9%Sonoma Community Center: $5k → 9%La Luz Center: $5k → 9%Vintage House: $5k → 9%La Luz Center: $5k → 9%La Luz Center: $5k → 9%Sonoma Community Center: $1k → 9%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount

Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty linein the grantee’s ZIP, averaged from the tracts in that ZIP; grantee ZIP can differ from where services are delivered.

Which US states your grants reach

MN
NY
MA
OR
PA
NJ
CA
NE
MD
DC

US grants placed by each grantee’s ZIP, which can differ from where services are actually delivered. Need from public data — U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA — shown as context about the area, never attributed to your giving.

03Your edge
repeat funding

Who you back again

Which organizations you funded more than once, and which you funded a single time. Each grantee is matched to its own filings.

97%of every dollar goes to organizations you’ve funded before.
$15M · 60 repeat orgs$475k to everyone else

And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +26% since the first grant, against +4% for the ones you funded once.

60 repeat relationships — 34 still active in FY2025, 26 since wound down; 2 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

60
42

Total granted

$15M
$315k

Median revenue growth · since first grant

+26%
+4%

Still filing today

78%
43%

New vs renewed · share of each year

In FY2025, 90% of grant dollars renewed an existing relationship; $160k went to new ones.

50%100%’17’18’19’20’21’22’23’24’25
RenewedFirst-time

Where new relationships form · theme of each grantee’s first grant

’17’18’19’20’21’22’23’24’25
Arts & CultureEducationHealthHuman ServicesEnvironmentPhilanthropyOther

First-time = a grantee’s first year in your filing window; renewed = funded in an earlier year too. As a portfolio matures the renewed share naturally climbs — once funded, an org stays “renewable” — so the signal is the years that buck it (a new-grantee intake wave). The earliest year is left-censored: relationships that predate the data read as “new.” Theme is the grantee’s IRS cause.

Backed again, and grew

  • SV
    SONOMA VALLEY HOSPITAL FOUNDATION
    9× · 2017–2025 · $2.9M · revenue +26% · 40% of their budget
  • SV
    Sonoma Valley Mentoring Alliance
    9× · 2017–2025 · $605k · revenue +158%
  • SO
    SONOMA OVERNIGHT SUPPORT INC
    8× · 2017–2024 · $547k · revenue +17%

Funded once

  • KC
    Krause Center For Innovation
    one grant, 2022 · $50k
  • VV
    Valley Vibes Youth Orchchestra
    one grant, 2020 · $40k
  • MU
    McGill University
    one grant, 2023 · $25k

Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.

04Your field

The map has a center of gravity: the average direction from the rest of the sector toward the organizations the foundation funds — the shape of its giving. Scoring every nonprofit along that direction surfaces the ones that look most like the portfolio. These are the closest matchesthat aren’t grantees — a resemblance in what they say they do, not a recommendation.

1
Sonoma Mountain Institute
Environment
2
Museum of Sonoma County

The museum of sonoma county engages and inspires our diverse community with art and history exhibitions, collections, and public programs that are inclusive, educational, and relevant.

Arts & Culture
3
Sonoma Valley Film Festival

Sonoma valley film society produces the annual international film festival

Arts & Culture
4
Solano Community Foundation

The Solano Community Foundation strengthens Solano County by advancing equity, supporting nonprofit resilience, and expanding access to philanthropy. We serve as a community leader, responsive grantmaker, and trusted partner for donors who…

Philanthropy
5
Sonoma Ecology Center

The Mission of Sonoma Ecology Center is to work with our community to enhance and sustain ecological health in the Sonoma valley.

Environment
6
Silicon Valley Shakespeare

Silicon valley shakespeare is innovating the classics through unique and relevant theatrical experiences that illuminate and inspire modern audiences.

Arts & Culture
7
Sonoma Charter School

Sonoma charter school seeks to achieve academic excellence through engaged learning in a setting that involves students, teachers, and parents.

Education
8
San Francisco Film Society

SFFILM is a nonprofit organization whose mission ensures independent voices in film are welcomed, heard, and given the resources to thrive. SFFILM connects and inspires audiences, students and teachers, and filmmakers through our film…

—
9
The Sierra Fund

The Sierra Fund (TSF) is a non-profit organization with a mission to restore ecosystem and community resiliency in the Sierra Nevada.

Environment
10
San Francisco Girls' School

To educate and inspire girls to become innovators and leaders in stem.

—
11
Ucsf Foundation Investment Company

The organization provides professional investment management services for endowed gifts and financial assets entrusted to the ucsf foundation.

Education
12
The Sobrato Foundation

The Sobrato Foundation supports nonprofits and social impact organizations serving at-risk and vulnerable members of our community. The Foundation also makes investments to support philanthropic activities recommended by individual Sobrato…

Philanthropy

For reference, the grantee most central to the portfolio’s shape is Sonoma Land Trust and the most unlike its peers is Sonoma Botanical Garden. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.

Your grantees are a median of 32 years old; the field is 16. You back the established end — and your money leans older still.

THE FIELDby orgYOUR GRANTEESby number21%3%<5yr14%9%5–10yr20%20%10–20yr19%23%20–35yr14%28%35–55yr12%17%55yr+
THE FIELDby orgYOUR MONEYby value21%1%<5yr14%4%5–10yr20%11%10–20yr19%31%20–35yr14%31%35–55yr12%22%55yr+

The field is 21% startups (under 5 years old) — 3% of your grantees by number, and just 1% of your money.

Closures · last 5 years

The orgs you fund almost never close — 0.0% lost their exemption, against 11% of the field you don’t fund.

orgs you fund
0.0%0/72
the rest of the field
11%
5,373/48,523

Age = years since IRS exemption (a founding proxy). “Closed” = auto-revocation for 3 years of non-filing — a floor on closure, not proof, and bigger established orgs lapse least. Association, not causation.

04the grantee network

69 grantees tracked through their own filings, 2017–2025.

Each one resolved to its own IRS returns and tracked year by year — your grant beside their revenue from every source. Association, dated; never a causal claim.

Counted here: distinct organizations you funded across 2017–2025, not grant rows in a single year — so this will not match the grant count on the cover. 69 of the 105 grantees resolved in that span have returns of their own we could reconcile; the rest are funded organizations whose filings we could not track year by year.

2
Load-bearing (≥25% of a budget)
15
Early backer (in before they grew)
68/69
Grantees still filing
37/69
Grew since you first funded

Where your money sits — by cause, then by grantee

KQED INC — $1,125,000 · Arts & CultureKQED INCTRANSCENDENCE THEATRE COMPANY — $946,100 · Arts & CultureTRANSCENDENCE THEATRE CO…Sonoma Valley Authors Festival — $261,500 · Arts & CultureSonoma Valley Authors Fe…ARTESCAPE — $250,000 · Arts & CultureARTESCAPESonoma Valley Museum of Art — $226,510 · Arts & CultureSonoma Valley Museum of …Sonoma Plein Air Foundation — $168,500 · Arts & CultureKID SCOOP NEWS — $129,000 · Arts & Culture+8 more — $271,000 · Arts & Culture+8 moreSONOMA VALLEY HOSPITAL FOUNDATION — $2,879,153 · HealthSONOMA VALLEY HOSPITAL …PLANNED PARENTHOOD MAR MONTE INC — $450,000 · HealthPLANNED PARENTHOOD MAR …+3 more — $26,857 · HealthMcGill University-Faculty of Engine — $1,191,426 · OtherMcGill University-Faculty of…Catholic Char Diocese of Santa Rosa — $250,000 · OtherCatholic Char Diocese of San…Vivo — $240,000 · OtherVivoSSU Academic Foundation — $195,000 · OtherSONOMA VALLEY TEEN SERVICES — $140,000 · OtherSONOMA OVERNIGHT SUPPORT INC — $547,000 · OtherSONOMA OVERNIGHT SUPPORT INCSONOMA LAND TRUST — $175,000 · OtherVALLEY OF THE MOON NATURAL HISTORY ASSOCIATION — $155,500 · OtherREDWOOD EMPIRE FOOD BANK — $170,000 · OtherSONOMA FAMILY MEAL — $150,000 · Other+56 more — $765,477 · Other+56 moreSonoma Valley Education Foundation — $2,121,812 · PhilanthropySonoma Valley Ed…SONOMA COUNTY COMMUNITY FOUNDATION — $100,000 · Philanthropy+3 more — $71,000 · PhilanthropyVintage House Multi Purpose Senior Center — $360,000 · Human ServicesSONOMA COMMUNITY CENTER — $303,500 · Human ServicesLA LUZ CENTER — $203,000 · Human ServicesMARIN LINK INC — $153,690 · Human ServicesSonoma Immigrant Services Inc — $60,000 · Human ServicesBOYS & GIRLS CLUBS OF SONOMA VALLEY BOYS & GIRLS CLUBS OF SONOMA VALLEY — $968,519 · Youth Development+1 more — $2,000 · Youth DevelopmentSonoma Valley Mentoring Alliance — $605,000 · EducationUNIVERSITY OF CALIFORNIA SAN FRANCISCO FOUNDATION — $220,700 · Education+5 more — $58,500 · Education
Arts & Culture$3,377,610Health$3,356,010Other$3,979,403Philanthropy$2,292,812Human Services$1,080,190Youth Development$970,519Education$884,200

Each org by its size and your share of it — top-left is where you’re load-bearing

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ your share of their budgetSONOMA VALLEY HOSPITAL FOUNDATION — $2,879,153 over 9y, 40% of budgetSonoma Valley Education Foundation — $2,121,812 over 9y, 27% of budgetKQED INC — $1,125,000 over 7y, 0.2% of budgetBOYS & GIRLS CLUBS OF SONOMA VALLEY BOYS & GIRLS CLUBS OF SONOMA VALLEY — $968,519 over 9y, 4.6% of budgetTRANSCENDENCE THEATRE COMPANY — $946,100 over 9y, 5.1% of budgetSonoma Valley Mentoring Alliance — $605,000 over 9y, 13% of budgetSONOMA OVERNIGHT SUPPORT INC — $547,000 over 8y, 12% of budgetPLANNED PARENTHOOD MAR MONTE INC — $450,000 over 9y, 0.1% of budgetVintage House Multi Purpose Senior Center — $360,000 over 8y, 9.2% of budgetSONOMA COMMUNITY CENTER — $303,500 over 9y, 4.1% of budgetSonoma Valley Authors Festival — $261,500 over 4y, 11% of budgetARTESCAPE — $250,000 over 8y, 14% of budgetSonoma Valley Museum of Art — $226,510 over 9y, 3.5% of budgetUNIVERSITY OF CALIFORNIA SAN FRANCISCO FOUNDATION — $220,700 over 8y, 0.0% of budgetLA LUZ CENTER — $203,000 over 9y, 1.9% of budgetSONOMA LAND TRUST — $175,000 over 9y, 0.4% of budgetREDWOOD EMPIRE FOOD BANK — $170,000 over 4y, 0.1% of budgetSonoma Plein Air Foundation — $168,500 over 9y, 11% of budgetVALLEY OF THE MOON NATURAL HISTORY ASSOCIATION — $155,500 over 5y, 5.3% of budgetMARIN LINK INC — $153,690 over 3y, 5.1% of budgetSONOMA FAMILY MEAL — $150,000 over 1y, 12% of budgetSONOMA VALLEY TEEN SERVICES — $140,000 over 4y, 8.4% of budgetKID SCOOP NEWS — $129,000 over 7y, 10% of budgetSONOMA COUNTY COMMUNITY FOUNDATION — $100,000 over 2y, 0.2% of budgetWork on Climate — $70,000 over 2y, 7.0% of budgetSonoma Immigrant Services Inc — $60,000 over 2y, 5.5% of budgetSANTA ROSA SYMPHONY ASSOCIATION — $60,000 over 7y, 0.3% of budgetCOMPUTER HISTORY MUSEUM — $55,000 over 5y, 0.3% of budgetFOOTHILL-DEANZA COMMUNITY COLLEGES FOUNDATION — $55,000 over 2y, 0.8% of budgetCalMatters — $46,000 over 4y, 0.2% of budgetSebastiani Theatre Foundation Inc — $35,500 over 7y, 1.7% of budgetTHE TECH INTERACTIVE — $35,000 over 3y, 0.1% of budgetTHEATREWORKS SILICON VALLEY — $30,500 over 9y, 0.1% of budgetMOUNTAIN VIEW LOS ALTOS HIGH SCHOOL FOUNDATION — $30,000 over 3y, 0.5% of budgetSAN FRANCISCO OPERA ASSOCIATION — $30,000 over 6y, 0.0% of budgetSonoma Speaker Series — $25,000 over 4y, 6.9% of budgetSeeds of Learning — $22,000 over 3y, 2.2% of budgetFrancisco Park Conservancy — $20,000 over 2y, 1.8% of budgetSonoma Arts Live — $20,000 over 3y, 1.3% of budgetSONOMA COUNTY VINTNERS FOUNDATION — $17,000 over 2y, 0.5% of budgetInternational Rescue Committee INC — $15,000 over 2y, 0.0% of budgetPROJECT HEALING WATERS FLY FISHING INC — $13,857 over 3y, 0.3% of budgetLOS ALTOS EDUCATIONAL FOUNDATION — $11,000 over 2y, 0.3% of budgetSonoma Botanical Garden — $10,900 over 4y, 0.2% of budgetInstitute of Electrical and Electronics Engineers Inc — $10,500 over 8y, 0.0% of budgetTHE TRUST FOR PUBLIC LAND — $10,000 over 1y, 0.0% of budgetCALIFORNIA COLLEGE OF THE ARTS — $10,000 over 1y, 0.0% of budgetCUREPSP INC — $10,000 over 1y, 0.2% of budget
Go grantee by grantee — a decade per org, and how each moved after you funded them

A decade per grantee — revenue shaded, your grants as bars, all rows on one timeline.

  • Who funds SONOMA VALLEY HOSPITAL FOUNDATION ↗
  • Who funds Sonoma Valley Education Foundation ↗
  • Who funds KQED INC ↗
  • Who funds BOYS & GIRLS CLUBS OF SONOMA VALLEY BOYS & GIRLS CLUBS OF SONOMA VALLEY ↗
  • Who funds TRANSCENDENCE THEATRE COMPANY ↗
  • Who funds Sonoma Valley Mentoring Alliance ↗
  • Who funds SONOMA OVERNIGHT SUPPORT INC ↗
  • Who funds PLANNED PARENTHOOD MAR MONTE INC ↗
  • Who funds Vintage House Multi Purpose Senior Center ↗
  • Who funds SONOMA COMMUNITY CENTER ↗
  • Who funds Sonoma Valley Authors Festival ↗
  • Who funds ARTESCAPE ↗
  • Who funds Sonoma Valley Museum of Art ↗
  • Who funds UNIVERSITY OF CALIFORNIA SAN FRANCISCO FOUNDATION ↗
  • Who funds LA LUZ CENTER ↗
  • Who funds SONOMA LAND TRUST ↗
  • Who funds REDWOOD EMPIRE FOOD BANK ↗
  • Who funds Sonoma Plein Air Foundation ↗
  • Who funds VALLEY OF THE MOON NATURAL HISTORY ASSOCIATION ↗
  • Who funds MARIN LINK INC ↗
  • Who funds SONOMA FAMILY MEAL ↗
  • Who funds SONOMA VALLEY TEEN SERVICES ↗
  • Who funds KID SCOOP NEWS ↗
  • Who funds SONOMA COUNTY COMMUNITY FOUNDATION ↗
  • Who funds Work on Climate ↗
  • Who funds Sonoma Immigrant Services Inc ↗
  • Who funds SANTA ROSA SYMPHONY ASSOCIATION ↗
  • Who funds COMPUTER HISTORY MUSEUM ↗
  • Who funds FOOTHILL-DEANZA COMMUNITY COLLEGES FOUNDATION ↗
  • Who funds CalMatters ↗
  • Who funds Sebastiani Theatre Foundation Inc ↗

The grantmakers whose grantees overlap with yours far more than size alone predicts. Each orbits closer the stronger the alignment; the arcs between them show where they also fund each other. Here it reads as a tightly interlocked camp — most of these funders back each other's grantees too.

Sonoma County Communi…McNabb FoundationMarin Community Found…Women Giving as One I…Simon Blattner Family…Khr McNeely Family Fo…Sanderson Family Foun…Sonoma County Vintner…Manitou FundGaia FundSonoma Valley Vintner…Jewish Community Fede…
Sonoma County Community FoundationCA58.8× affinity27 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Sonoma County Community Foundation · McNabb Foundation · Marin Community Foundation · Women Giving as One Inc · Simon Blattner Family Foundation · Khr McNeely Family Foundation · Sanderson Family Foundation · Sonoma County Vintners Foundation · Manitou Fund · Gaia Fund · Sonoma Valley Vintners & Growers Foundation · Jewish Community Federation of San Francisco the Peninsula Marin & Sonoma

Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. A research starting point: overlap is association, not proof of shared intent.

Government reliance of your grantees

Every dot is one organization The Vadasz Family Foundation funds. Left–right is the share of its income from government; up–down is the share from you. Bigger dots raise more. Filter to federal or a single department — and drag the year to watch it move.

2024
’20’21’22’23’24’25
no gov · 10%3%13%28%50%your share of their income ↑0%13%25%38%50%share of the org’s income from government →median 46%
  • Project Healing Waters Fly Fishing Inc — 46% of income from government
  • Institute of Electrical and Electronics Engineers Inc — 1% of income from government
no gov moneyreceives it· size = income
1get no government money at all
18report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–50%
typical government reliance, FY20–25

Government income is each org’s traced federal awards (USASpending — grants and contracts) plus state payments (open checkbooks) as a share of its total revenue (IRS Form 990); the self-reported government-grant line (990 line 1e) is carried for cross-check: a grantee that reports government grants we could not trace to a source is left off the chart rather than shown as receiving none. An association, not a claim that your grant caused the public funding. Coverage is precision-first — a floor, not a census; state records exist for 9 states, so a grantee outside them shows no state figure (dimmed) rather than a false zero. Federal award amounts are obligations, which can span years, so a single-year share is indicative. 990 filings lag 12–24 months.

On method. Every financial figure here is read directly from IRS e-file XML — your own 990/990-PF and the multi-year returns of the 105 grantees we resolved across every year we hold, several hundred filings in all (a different count from the grant rows on the cover, which are one fiscal year)— each linked to its source. Grantee achievements and outcomes are each organization’s own program-service reporting (Form 990, Part III); we read these as association with sustained funding — the foundation is one of several forces — suppress low-confidence name matches rather than guess, and say so where a figure rests on a single grant or filing. Not everything on this page is a filed figure, and the difference matters. Filed is what you reported on your return. Official is another government record about an organization, such as a federal award or a charity register, joined by name where no shared identifier exists. Resolved is an identity we worked out where the filing named a recipient without an EIN, kept only above a measured confidence threshold. Computed is arithmetic over those, like themes, portfolio clusters and co-funder strength. Context is a statistic about a place rather than about an organization, which is what the need overlay is: it describes the area a grantee’s address sits in, not where its work lands. Inferred is drawn by a model from text, like the partnerships read out of public news and organization websites. Each is labeled where it appears. How we build these →

Generated from your IRS Form 990-PF e-file return for fiscal year 2025, released 2025. Filings run roughly 12–24 months behind; figures are dated accordingly.

Source object · view filing

More from the funding graph

The unnamed billions
grants reported with no recipient in the public record
The regranting layer
51% of grant dollars land in the regranting layer
The DAF merry-go-round
$9.7B circulates between donor-advised funds
The endowment market
who holds foundation money, and what just moved
The camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home