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· Private foundation

Tarbell Family Foundation

Its FY2024 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$732k
Granted FY2024still arriving
139
Grants FY2024still arriving
15
States reached
$50k
Largest
01What you fundRead
02The needRead
03Your edgeRead
04Your fieldRead
05Through PlinthRead
01What you fund
0199% classified

What you funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2017–2024.

Education$2.0MArts & Culture$711kEnvironment$581kInternational$448kHuman Services$316kPublic Benefit$184kFood & Nutrition$147kReligion$146kOther$0
02FY2024 · 139 grants

Where the money goes

Your grants by size, and where they go.

By grant size · FY2024

  • Under $10k117 grants · $251k
  • $10k–50k21 grants · $431k
  • $50k–250k1 grant · $50k
$2,000
Median grant
15
States reached
$13M
Total assets
Largest grants
RecipientAmount
STONELEIGH-BURNHAM SCHOOL$50,000
MIDDLE EAST CHILDRENS ALLIANCE$40,000
WATERSHED RESEARCH AND TRAINING CENTER$37,000
STONELEIGH-BURNHAM SCHOOL$35,000
SHAWL-ANDERSON MODERN DANCE CENTER$29,000
EAST BAY GERMAN INTERNATIONAL SCHOOL$27,000
PORTLAND STATE UNIVERSITY FOUNDATION$25,000
HISTORICAL SITES SOCIETY OF ARCATA INCORPORATED$25,000
CASPAR COMMUNITY$25,000
PROTESTANT EPISCOPAL CHURCH IN THE DIOCESE OF CALI$20,000
WILLAMETTE UNIVERSITY$20,000
THINK WILD$17,000
DESCHUTES BASIN LAND TRUST$17,000
ALLIANCE FOR DEMOCRACY$15,000
OAKLAND GIRLS SOFTBALL LEAGUE$15,000
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 (FY17–24, $71k) land where the poverty rate runs at 13%, against an area that typically sits at 10%. 66% of those dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-need ZIPs.

area typical 10%GLOBAL DISASTER RELIEF TEAM: $1k → 7%HOSPICE BY THE BAY: $2k → 8%LA LUZ BILINGUAL CENTER: $2k → 9%GOLDEN STATE OPPORTUNITY FOUNDATION: $3k → 10%BY THE BAY HEALTH: $2k → 8%SBCS CORPORATION: $5k → 11%BY THE BAY HEALTH: $2k → 8%HOSPICE BY THE BAY: $1k → 8%HOSPICE BY THE BAY: $1k → 8%ASIFA-HOLLYWOOD ANIMATION AID FOUNDATION: $500 → 14%FRIENDLY HOUSE INC: $5k → 12%FRIENDLY HOUSE INC: $5k → 12%FRIENDLY HOUSE INC: $1k → 12%MATTOLE VALLEY RESOURCE CENTER: $10k → 18%NORTH AMERICAN CONGRESS ON LATIN AMERICA: $1k → 17%NORTH AMERICAN CONGRESS ON LATIN AMERICA: $1k → 17%NORTH AMERICAN CONGRESS ON LATIN AMERICA: $1k → 17%NORTH AMERICAN CONGRESS ON LATIN AMERICA: $1k → 17%NORTH AMERICAN CONGRESS ON LATIN AMERICA: $1k → 17%SAVING GRACE IMAGINE LIFE WITHOUT VIOLENCE: $300 → 10%PARTNERS IN CARE INC: $1k → 10%NORTH COAST OPPORTUNITIES INC: $2k → 18%NORTH COAST OPPORTUNITIES INC: $1k → 18%NORTH COAST OPPORTUNITIES INC: $1k → 18%NORTH COAST OPPORTUNITIES INC: $1k → 18%MENDOCINO COAST CHILDRENS FUND: $2k → 18%NORTH COAST OPPORTUNITIES INC: $1k → 18%NORTH COAST OPPORTUNITIES INC: $1k → 18%NORTH COAST OPPORTUNITIES INC: $1k → 18%NORTH COAST OPPORTUNITIES INC: $1k → 18%NORTH COAST OPPORTUNITIES INC: $1k → 18%MENDOCINO COAST CHILDRENS FUND: $500 → 18%YOUNG MENS CHRISTIAN ASSOCIATION OF THE EAST BAY: $2k → 10%OAKLAND CATHOLIC WORKER: $5k → 10%OAKLAND CATHOLIC WORKER: $3k → 10%OAKLAND CATHOLIC WORKER: $2k → 10%REDWOOD COAST SENIORS INC: $667 → 18%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

ME
WA
MT
MN
IL
NY
MA
OR
NV
WY
IA
IN
OH
PA
CT
CA
CO
VA
MD
AZ
TN
DC
MS
AL
TX
FL

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.

04

Where the work is directed

The same grants, placed two ways — where each recipient sits, and where its stated purpose earmarks the money.

About 5% of Tarbell Family Foundation’s grant dollars are earmarked, by their stated purpose, for a different county than the recipient’s own address — money that lands at a nonprofit in one place but is meant to do its work in another.

Tarbell Family Foundationlessmore of its giving
Placed by recipient address

Recipient view: each grant at its grantee’s ZIP, mapped to a county. Directed view: each grant at the county its stated purpose names, falling back to the recipient’s county when the purpose names no place; US grants only. A county shows only if it carries the top 95% of that view’s dollars. Purposes are read from the foundation’s own 990 grant descriptions.

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.

93%of every dollar goes to organizations you’ve funded before.
$5.0M · 166 repeat orgs$381k to everyone else

And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +37% since the first grant, against +30% for the ones you funded once.

166 repeat relationships — 102 still active in FY2024, 64 since wound down; 21 grantees were first funded in FY2024 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

166
87

Total granted

$5.0M
$314k

Median revenue growth · since first grant

+37%
+30%

Still filing today

86%
69%

New vs renewed · share of each year

In FY2024, 91% of grant dollars renewed an existing relationship; $67k went to new ones.

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

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

’17’18’19’20’21’22’23’24
Arts & CultureEducationInternationalEnvironmentHuman ServicesAnimalsOther

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

  • SS
    STONELEIGH-BURNHAM SCHOOL
    8× · 2017–2024 · $803k · revenue +18%
  • ME
    MIDDLE EAST CHILDREN'S ALLIANCE
    8× · 2017–2024 · $245k · revenue +559%
  • CC
    Caspar Community
    8× · 2017–2024 · $240k · revenue +37% · 45% of their budget

Funded once

  • EO
    EAST OAKLAND SCHOOL OF THE ARTS
    one grant, 2017 · $37k
  • MR
    Mendocino Rotary Foundation
    one grant, 2022 · $21k · revenue -78%
  • CS
    CALIFORNIA STATE UNIVERSITY SACRAMENTO
    one grant, 2020 · $15k

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
The Climate Center

The Climate Center is a climate and energy policy nonprofit working to rapidly reduce climate pollution at scale, starting in California.

Education
2
Sustainable Conservation

Sustainable Conservation advances the collaborative stewardship of Californias land, air, and water for the benefit of nature and people. For over three decades, Sustainable Conservation has built coalitions of people with different…

Environment
3
The Union of Concerned Scientists Inc

The union of concerned scientists puts rigorous, independent science into action, developing solutions and advocating for a healthy, safe, and just future.

International
4
California Coastkeeper dba California Coastkeeper Alliance

California Coastkeeper Alliance unites Waterkeeper programs statewide to fight for swimmable, fishable, and drinkable waters for all Californians.

Environment
5
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
6
San Francisco Public Press

The mission of the San Francisco Public Press is to enrich civic life by publishing investigative and solutions journalism that engages diverse audiences and promotes public accountability. The San Francisco Public Press…

Education
7
CalMatters

Our team of experienced journalists, with the time and resources to dig deep, is committed to meaningfully informing Californians about the players, politics, and interests that shape the issues that affect their lives.

Civil Rights
8
California Forward

Ca fwd drives action to identify solutions that can be taken to scale to meet the challenges the state is facing. the organization is driven by the belief that regional solutions across the state will help ensure economic, environmental,…

Public Benefit
9
San Francisco Bay Bird Observatory

The San Francisco Bay Bird Observatory is dedicated to the conservation of birds and their habitats through science and outreach.

Environment
10
Santa Cruz Local Inc

Independent nonpartisan newsroom serving Santa Cruz County, California we are all watching and engaged in our local government, our needs are addressed, democracy works better and our community is stronger.

—
11
California Ocean Science Trust

California ocean science trust (ost) is a non-profit organization dedicated to accelerating progress towards a healthy and productive ocean future for california. created by state legislation, ost bridges the gap between cutting-edge…

Environment
12
Bay Nature Institute dba Bay Nature Bay Nature Magazine

Bay Nature connects the people of the San Francisco Bay Area to our natural world and motivates people to solve problems with nature in mind. Our vision is that all people have a close relationship with theirnatural world.

Environment

For reference, the grantee most central to the portfolio’s shape is Social and Environmental Entrepreneurs (See) Inc and the most unlike its peers is The Krenov Foundation. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.

For each theme you fund, this compares how the sector’s money is shifting with how your own giving is shifting.

← shrinkinggrowing →↓ leaning in → pulling backsteadyEnvironmental Conservation …Dance Arts OrganizationsPolicy Research and AdvocacyJewish Community Organizati…Animal Rescue and ShelterFaith-Based Social ServicesLocal History MuseumsCommunity Arts CentersYouth Sports ProgramsCommunity FoundationsFaith-Based Liberal Arts Co…Cancer Support ServicesElementary Literacy TutoringYouth Development ServicesHealth Access Advocacy and …Lgbtq+ Community SupportChristian Missionary Organi…Affordable Housing Developm…Affordable Housing Construc…Developmental Disabilities …Public Library OperationsSchool Parent OrganizationsFood Banks and PantriesLocal Food System Organizat…Volunteer Fire & Ems Servic…Community College Foundatio…Independent K-12 SchoolsCommunity Foundations
the sector your giving your giving is ahead of the sector the sector’s ahead of you· dot size = how much the theme matters to each side
Ordered by the change in your giving — leaning in on top, pulling back at the bottom. The bar between the two dots is how out of step you are with the sector. Hover any row for detail.

Sector change and giving change are each shown relative to their own range, growing (right) or shrinking (left); both normalized, so inflation isn’t mistaken for growth.

Your grantees are a median of 30 years old; the field is 14. You back the established end — and your money leans older still.

THE FIELDby orgYOUR GRANTEESby number24%5%<5yr15%9%5–10yr20%17%10–20yr17%32%20–35yr11%21%35–55yr13%16%55yr+
THE FIELDby orgYOUR MONEYby value24%2%<5yr15%6%5–10yr20%8%10–20yr17%31%20–35yr11%12%35–55yr13%41%55yr+

The field is 24% startups (under 5 years old) — 5% of your grantees by number, and just 2% of your money.

Closures · last 5 years

The orgs you fund almost never close — 3% lost their exemption, against 14% of the field you don’t fund.

orgs you fund
3%7/260
the rest of the field
14%
25,999/186,718

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.

05the grantee network

234 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. 234 of the 280 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.

3
Load-bearing (≥25% of a budget)
71
Early backer (in before they grew)
226/234
Grantees still filing
156/234
Grew since you first funded

Where your money sits — by cause, then by grantee

STONELEIGH-BURNHAM SCHOOL — $803,217 · EducationSTONELEIGH-BURNHAM SCHOOLWILLAMETTE UNIVERSITY — $213,000 · EducationWILLAMETTE UNIVERSITYEast Bay German International School — $161,000 · EducationEast Bay German International Schoo…UNIVERSITY OF OREGON FOUNDATION — $149,280 · EducationUNIVERSITY OF OREGON FOUNDATIONTHE WATERSHED RESEARCH & TRAINING CENTER — $73,000 · Education+19 more — $267,500 · Education+19 morePORTLAND STATE UNIVERSITY FOUNDATION — $274,657 · OtherPORTLAND STATE UNIVERSITY FOUNDATIONPROTESTANT EPISCOPAL CHURCH IN THE DIOCESE OF CALI — $130,000 · OtherPROTESTANT EPISCOPAL CHURCH IN THE DIOC…Thornhill Parent Faculty Club — $100,000 · OtherThornhill Parent Faculty ClubTHE ALLIANCE FOR DEMOCRACY INC — $110,000 · OtherTHE ALLIANCE FOR DEMOCRACY INC+95 more — $1,243,985 · Other+95 moreShawl-Anderson Modern Dance Center — $169,000 · Arts & CultureShawl-Ander…Berkeley Playhouse Inc — $51,000 · Arts & CultureBerkeley Pl…KQED INC — $41,000 · Arts & CultureKQED INCMENDOCINO PERFORMING ARTS COMPANY — $40,000 · Arts & CultureMENDOCINO P…MENDOCINO FILM FESTIVAL INC — $37,000 · Arts & CultureMENDOCINO F…FRIENDS OF THE JOAQUIN MORAGA ADOBE — $27,000 · Arts & CultureINDEPENDENT WORLD TELEVISION INC — $19,500 · Arts & Culture+19 more — $141,276 · Arts & Culture+19 moreMIDDLE EAST CHILDREN'S ALLIANCE — $245,000 · InternationalMIDDLE EAS…A JEWISH VOICE FOR PEACE — $42,000 · InternationalA JEWISH V…GLOBAL EXCHANGE — $40,000 · InternationalGLOBAL EXC…UNRWA USA NATIONAL COMMITTEE INC — $37,000 · InternationalUNRWA USA …UNITED PALESTINIAN APPEAL INC — $34,500 · InternationalUNITED PAL…+14 more — $97,000 · International+14 moreDeschutes Land Trust — $122,000 · EnvironmentDeschutes…Mendocino Land Trust — $60,000 · EnvironmentMendocino…TRUCKEE DONNER LAND TRUST — $46,000 · EnvironmentTRUCKEE D…MID KLAMATH WATERSHED COUNCIL — $34,000 · EnvironmentMID KLAMA…MATTOLE RESTORATION COUNCIL — $32,000 · EnvironmentMATTOLE R…GLOBAL GREENGRANTS FUND — $30,000 · EnvironmentGLOBAL GR…Mendocino Rotary Foundation — $20,500 · EnvironmentCLOUD FOREST INSTITUTE — $16,000 · Environment+10 more — $70,000 · Environment+10 moreCaspar Community — $240,000 · Community ImprovementSISTERS KIWANIS COMMUNITY SERVICE FOUNDATION — $9,167 · Community Improvement+1 more — $5,700 · Community ImprovementThink Wild — $57,000 · AnimalsNoyo Center For Marine Science — $45,000 · AnimalsUNDERDOG ANIMAL RESCUE — $10,000 · AnimalsTHE MILO FOUNDATION — $10,000 · AnimalsMUTTVILLE — $10,000 · AnimalsWILD CAT EDUCATION & CONSERVATION FUND — $6,000 · AnimalsPAW FUND — $5,500 · Animals+4 more — $14,500 · Animals
Education$1,666,997Other$1,858,642Arts & Culture$525,776International$495,500Environment$430,500Community Improvement$254,867Animals$158,000

Showing your 200 largest grantees by grant value.

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

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ your share of their budgetSTONELEIGH-BURNHAM SCHOOL — $803,217 over 8y, 1.6% of budgetPORTLAND STATE UNIVERSITY FOUNDATION — $274,657 over 8y, 0.2% of budgetMIDDLE EAST CHILDREN'S ALLIANCE — $245,000 over 8y, 1.3% of budgetCaspar Community — $240,000 over 8y, 45% of budgetWILLAMETTE UNIVERSITY — $213,000 over 7y, 0.3% of budgetShawl-Anderson Modern Dance Center — $169,000 over 6y, 4.2% of budgetEast Bay German International School — $161,000 over 3y, 4.4% of budgetUNIVERSITY OF OREGON FOUNDATION — $149,280 over 6y, 0.0% of budgetDeschutes Land Trust — $122,000 over 8y, 2.3% of budgetTHE ALLIANCE FOR DEMOCRACY INC — $110,000 over 8y, 56% of budgetTHE WATERSHED RESEARCH & TRAINING CENTER — $73,000 over 3y, 0.4% of budgetMendocino Land Trust — $60,000 over 8y, 0.9% of budgetThink Wild — $57,000 over 3y, 3.1% of budgetNAMI OREGON — $56,000 over 8y, 1.5% of budgetTHE SEA RANCH VOLUNTEER FIRE DEPARTMENT N SONOMA COAST VOLUNTEER FIREASSOCIATION — $54,000 over 7y, 11% of budgetBerkeley Playhouse Inc — $51,000 over 5y, 0.9% of budgetHOLLYWOOD HEART — $50,000 over 7y, 17% of budgetAMERICAN RESEARCH INSTITUTE IN TURKEY — $46,000 over 7y, 0.9% of budgetTRUCKEE DONNER LAND TRUST — $46,000 over 5y, 0.1% of budgetPETROLIA VOLUNTEER FIRE DEPARTMENT — $45,000 over 5y, 13% of budgetNoyo Center For Marine Science — $45,000 over 8y, 2.9% of budgetMENDOCINO COUNTY PUBLIC BROADCASTING — $42,000 over 8y, 0.9% of budgetA JEWISH VOICE FOR PEACE — $42,000 over 4y, 0.3% of budgetKQED INC — $41,000 over 8y, 0.0% of budgetTRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA — $41,000 over 7y, 0.0% of budgetMENDOCINO PERFORMING ARTS COMPANY — $40,000 over 8y, 4.5% of budgetGLOBAL EXCHANGE — $40,000 over 8y, 0.7% of budgetDestiny Arts Center — $40,000 over 7y, 0.4% of budgetTHE CHRIST SCHOOL — $38,000 over 4y, 0.3% of budgetUNRWA USA NATIONAL COMMITTEE INC — $37,000 over 7y, 0.1% of budgetMENDOCINO FILM FESTIVAL INC — $37,000 over 8y, 15% of budgetTHE UNIVERSITY FOUNDATION AT SACRAMENTO STATE — $35,000 over 3y, 0.1% of budgetUNITED PALESTINIAN APPEAL INC — $34,500 over 6y, 0.0% of budgetMID KLAMATH WATERSHED COUNCIL — $34,000 over 3y, 0.5% of budgetSAN FRANCISCO FOOD BANK — $33,000 over 4y, 0.0% of budgetMATTOLE RESTORATION COUNCIL — $32,000 over 7y, 0.4% of budgetKCRW FOUNDATION INC — $32,000 over 7y, 0.0% of budgetGLOBAL GREENGRANTS FUND — $30,000 over 7y, 0.0% of budgetBay Area Ridge Trail Council — $28,637 over 6y, 0.7% of budgetFRIENDS OF THE JOAQUIN MORAGA ADOBE — $27,000 over 3y, 11% of budgetSAFE PASSAGE FAMILY RESOURCE CENTER — $26,000 over 4y, 4.0% of budgetHUMBOLDT AREA FOUNDATION — $25,500 over 3y, 0.1% of budgetOakland Girls Softball League — $25,000 over 4y, 14% of budgetCommunity Environmental Legal Defense Fund — $23,000 over 7y, 1.3% of budgetTHE UNIVERSITY OF PUGET SOUND — $21,000 over 2y, 0.0% of budgetMendocino Rotary Foundation — $20,500 over 1y, 15% of budgetOTIS COLLEGE OF ART AND DESIGN — $20,000 over 3y, 0.0% of budgetThe Body Positive — $20,000 over 3y, 1.9% 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 STONELEIGH-BURNHAM SCHOOL ↗
  • Who funds PORTLAND STATE UNIVERSITY FOUNDATION ↗
  • Who funds MIDDLE EAST CHILDREN'S ALLIANCE ↗
  • Who funds Caspar Community ↗
  • Who funds WILLAMETTE UNIVERSITY ↗
  • Who funds Shawl-Anderson Modern Dance Center ↗
  • Who funds East Bay German International School ↗
  • Who funds UNIVERSITY OF OREGON FOUNDATION ↗
  • Who funds Deschutes Land Trust ↗
  • Who funds THE ALLIANCE FOR DEMOCRACY INC ↗
  • Who funds Thornhill Parent Faculty Club ↗
  • Who funds THE WATERSHED RESEARCH & TRAINING CENTER ↗
  • Who funds Mendocino Land Trust ↗
  • Who funds Think Wild ↗
  • Who funds NAMI OREGON ↗
  • Who funds THE SEA RANCH VOLUNTEER FIRE DEPARTMENT N SONOMA COAST VOLUNTEER FIREASSOCIATION ↗
  • Who funds Berkeley Playhouse Inc ↗
  • Who funds HOLLYWOOD HEART ↗
  • Who funds AMERICAN RESEARCH INSTITUTE IN TURKEY ↗
  • Who funds TRUCKEE DONNER LAND TRUST ↗
  • Who funds PETROLIA VOLUNTEER FIRE DEPARTMENT ↗
  • Who funds Noyo Center For Marine Science ↗
  • Who funds MENDOCINO COUNTY PUBLIC BROADCASTING ↗
  • Who funds A JEWISH VOICE FOR PEACE ↗
  • Who funds KQED INC ↗
  • Who funds TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA ↗
  • Who funds MENDOCINO PERFORMING ARTS COMPANY ↗
  • Who funds GLOBAL EXCHANGE ↗
  • Who funds Destiny Arts Center ↗
  • Who funds THE CHRIST SCHOOL ↗
  • Who funds UNRWA USA NATIONAL COMMITTEE INC ↗
  • Who funds MENDOCINO FILM FESTIVAL INC ↗
  • Who funds THE UNIVERSITY FOUNDATION AT SACRAMENTO STATE ↗
  • Who funds UNITED PALESTINIAN APPEAL INC ↗
  • Who funds MID KLAMATH WATERSHED COUNCIL ↗
  • Who funds SAN FRANCISCO FOOD BANK ↗
  • Who funds MATTOLE RESTORATION COUNCIL ↗

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.

Community Foundation …East Bay Community Fo…The Roundhouse Founda…The San Francisco Fou…Marin Community Found…Humboldt Area Foundat…Maybelle Clark Macdon…The William & Flora H…The Oregon Community …Rsf Social Finance IncThe California Wellne…Meyer Memorial Trust
Community Foundation of Mendocino CountyCA61.6× affinity30 shared granteesties to 10 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Community Foundation of Mendocino County · East Bay Community Foundation · The Roundhouse Foundation · The San Francisco Foundation · Marin Community Foundation · Humboldt Area Foundation · Maybelle Clark Macdonald Fund · The William & Flora Hewlett Foundation · The Oregon Community Foundation · Rsf Social Finance Inc · The California Wellness Foundation · Meyer Memorial Trust

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 Tarbell 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, a single department, or state — and drag the year to watch it move.

2024
’20’21’22’23’24’25
no gov · 190%6%23%51%90%your share of their income ↑0%25%50%75%100%share of the org’s income from government →median 3%
  • Mercy Corps — 47% of income from government
  • Deschutes Land Trust — 46% of income from government
  • Nami Oregon — 10% of income from government
  • Think Wild — 7% of income from government
  • Out Central Oregon — 3% of income from government
  • Bendfilm Inc — 3% of income from government
  • Smart Reading — 3% of income from government
  • Friendly House Inc — 3% of income from government
  • Coalition for the Homeless of Central Florida Inc — 2% of income from government
  • Willamette University — 1% of income from government
  • Central Oregon Environmental Center Inc Dba - the Environmental Center — 0% of income from government
  • Americares Foundation Inc — 0% of income from government
  • Second Harvest Food Bank of Central Florida Inc — 0% of income from government
  • Oregon Shakespeare Festival Association Inc — 0% of income from government
  • Portland State University Foundation — 0% of income from government
no gov moneyreceives it· size = income
19get no government money at all
43report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
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.

05Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to Tarbell Family Foundation?

Find your warmest path to Tarbell Family Foundation through trustees and officers whose names appear on both boards. Search for your organization and Plinth traces the shortest route it can evidence.

Each link is a name appearing on two organizations’ public IRS 990 filings, matched on that name and, where the filings support it, on location. A same-state match has geographic support, which is a second matching feature rather than confirmation that the two are one person; a cross-state one is the likeliest to be two people who share a name. Every hop shows its tier, low-confidence and distant paths are held back rather than guessed, and it is worth confirming the person before you use the introduction.

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 280 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 2024, released 2024. 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