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· Private foundation

Tonna Charitable Trust

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.

$90k
Granted FY2025still arriving
54
Grants FY2025still arriving
11
States reached
$10k
Largest
01What it funds
0197% classified

What it funded, over time

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

Religion$156kArts & Culture$139kEducation$118kEnvironment$47kHealth$46kAnimals$22kFood & Nutrition$18kHuman Services$16kOther$0
02FY2025 · 54 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k53 grants · $80k
  • $10k–50k1 grant · $10k
$1,000
Median grant
11
States reached
$1.3M
Total assets
Largest grants
RecipientAmount
PROVIDENCE COLLEGE$10,000
ST NICHOLAS ROMANIA ORTHODOX CHURCH$8,875
ST SPYRIDON GREEK ORTHODOX CATHEDRAL$7,400
WORCESTER ART MUSEUM$5,000
DETEC TOGETHER$4,500
SAINT KOSMAS ACADEMY INC$3,000
METROPOLIS OF BOSTON CAMP (MBC)$3,000
ST DIMITRIE ROMANIAN ORTHODOX CHURCH$2,500
ICON MUSEUM AND STUDY CENTER$2,500
NEW ENGLAND BOTANICAL GARDEN AT TOWER HILL$2,500
SYRACUSE UNIVERSITY$2,500
THE ELEPHANT SANCTUARY$2,000
SERVE SYRACUSE$2,000
PRESERVATION WORCESTER$2,000
ARTS WORCESTER$1,500
02The need
03

Does the money reach high-need areas?

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

show:

Its human-services grants (FY17–25, $13k) land where the poverty rate runs at 7%, against an area that typically sits at 9%. 24% of those dollars go to grantees based in above-average-need neighborhoods. Its grants skew toward lower-need ZIPs.

area typical 9%BOSTON FOUNDATION FOR SIGHT: $2k → 7%AMERICAN STROKE FOUNDATION: $100 → 5%BOSTON FOUNDATION FOR SIGHT: $1k → 7%BOSTON FOUNDATION FOR SIGHT: $1k → 7%BOSTON FOUNDATION FOR SIGHT: $1k → 7%BOSTON FOUNDATION FOR SIGHT: $1k → 7%BOSTON FOUNDATION FOR SIGHT: $1k → 7%BOSTON FOUNDATION FOR SIGHT: $1k → 7%BOSTON FOUNDATION FOR SIGHT: $1k → 7%BOSTON FOUNDATION FOR SIGHT: $1k → 7%PROJECT JUST BECAUSE: $100 → 8%AMERICAN RED CROSS: $200 → 11%THE MUSTARD SEED: $500 → 11%THE MUSTARD SEED: $500 → 11%THE MUSTARD SEED: $500 → 11%THE MUSTARD SEED: $500 → 11%THE MUSTARD SEED: $500 → 11%THE MUSTARD SEED: $500 → 11%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount
How this is measured
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty line in the grantee’s ZIP, averaged from the tracts in that ZIP.

Which US states its grants reach

VT
NH
MI
NY
MA
CT
RI
CA
MD
KS
TN
DC
GA
FL
How this is measured
US grants placed by each grantee’s ZIP, which can differ from where services are delivered. Need from public data (U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA), shown as context about the area, never attributed to the funder’s giving.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

97%of every dollar goes to organizations it has funded before.
$597k · 67 repeat orgs$19k to everyone else

67 repeat relationships: 45 still active in FY2025, 22 since wound down; 8 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

67
28

Total granted

$597k
$14k

Median revenue growth · since first grant

+17%
+19%

Still filing today

49%
39%

New vs renewed · share of each year

In FY2025, 94% of grant dollars renewed an existing relationship; $6k 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
EducationArts & CultureEnvironmentHuman ServicesAnimalsHealthOther
How this is measured
First-time means a grantee’s first year in the filing window; renewed means funded in an earlier year too. The renewed share climbs naturally as a portfolio matures, so the signal is a year that bucks it (a wave of new grantees). 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

  • PROVIDENCE COLLEGE
    5× · 2021–2025 · $48k · revenue +29%
  • WORCESTER ART MUSEUM
    9× · 2017–2025 · $37k · revenue +80%
  • BS
    BANCROFT SCHOOL
    6× · 2017–2022 · $25k · revenue +5%

Funded once

  • UM
    UMASS MEMORIAL COVID-19 RESPONSE FUND
    one grant, 2020 · $3k
  • TR
    TRAINING RESOURCES OF AMERICA INC
    one grant, 2018 · $2k · revenue -10%
  • SW
    SHELDRICK WILDWIFE TRUST USA
    one grant, 2024 · $2k
How this is measured

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

04Its field

Closest unfunded matches

The nonprofits that most resemble its grantees but are not funded by it, scored along the direction from the rest of the field toward the portfolio. A resemblance in what they say they do, not a recommendation.

1
Boston Architectural College

The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.

—
2
Wheaton College

Wheaton college provides a transformative liberal arts education, combining theory and practice, for intellectually curious students within a collaborative and vibrant extended community and network that values and strives to create an…

Education
3
Wentworth Institute of Technology Inc

Wentworth institute of technology is a nationally recognized private coeducational and residential university of higher education with a mission to empower, inspire and innovate through experiential learning with a core purpose of career…

Education
4
Western New England University

Western new england university, a comprehensive private institution with a tradition of excellence in teaching and scholarship and a commitment to service, awards undergraduate, master's, and doctoral degrees in various departments from…

Education
5
Harvard Conservation Trust

To preserve the unique character and natural resources of harvard.

Environment
6
Saint Anselm College

Saint anselm is a catholic, benedictine college providing all of its students a distinctive liberal arts education that incorporates opportunities for professional and career preparation. it does so in a learning community that encourages…

Education
7
Worcester Polytechnic Institute

Wpi transforms lives, turns knowledge into action to confront global challenges, and revolutionizes stem through distinctive and inclusive education, projects and research. (http://www.wpi.edu/about/mission.html)

—
8
Mcphs University

Mcphs university prepares students for careers in health care through teaching, scholarship, research, professional service and community engagement.

Education
9
Massachusetts Institute of Technology

The mission of mit is to advance knowledge and educate students in science, technology, and other areas of scholarship that will best serve the nation and the world in the 21st century.

Education
10
Massachusetts Higher Education Assistance Corporation

The organization's primary exempt purpose is to provide access to and conduct activities in furtherance of higher education.

—
11
President and Trustees of Bates College

Bates is a college of the liberal arts and sciences, and is a coeducational, nonsectarian, residential college with special commitments to academic rigor, and to assuring in all of its efforts the dignity of each individual, and access to…

Education
12
New England Museum Association

New england museum association's mission is to connect a community engaged in learning, collaboration, and action to cultivate a better museum world.

—
How this is measured
The grantee most central to the portfolio’s shape is Greater Worcester Community Foundation Inc; the most unlike its peers is Icon Museum and Study Center Inc. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
04the grantee network

51 grantees tracked through their own filings, 2017–2026.

Each grant beside the grantee’s revenue from every source, year by year.

How this is measured

Counted here: distinct organizations funded across 2017 to 2026, not grant rows in a single year, so this will not match the grant count on the cover. 51 of the 105 grantees resolved in that span have returns of their own we could reconcile.

Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.

0
Load-bearing (≥25% of a budget)
15
Early backer (in before they grew)
51/51
Grantees still filing
39/51
Grew since first funded

Where the money sits, by cause and then by grantee

ST SPYRIDON GREEK ORTHODOX CATHEDRAL: $56,075 · OtherST SPYRIDON GREEK ORTHODOX CATHEDRALST NICHOLAS ROMANIA ORTHODOX CHURCH: $40,210 · OtherST NICHOLAS ROMANIA ORTHODOX CHURCHST DIMITRIE ROMANIAN ORTHODOX CHURCH: $17,700 · OtherST DIMITRIE ROMANIAN ORTHODOX CHURCHHOLY TRINITY EASTERN ORTHODOX NURSING & REHABILITATION CENTER: $13,900 · OtherHELLENIC COLLEGE INC: $12,000 · OtherMETROPOLIS OF BOSTON CAMP (MBC): $11,500 · Other+67 more: $159,700 · Other+67 moreAMERICAN ANTIQUARIAN SOCIETY: $61,000 · EducationAMERICAN ANTIQUARIAN SOCIETYPROVIDENCE COLLEGE: $48,000 · EducationPROVIDENCE COLLEGEBANCROFT SCHOOL: $25,200 · EducationBANCROFT SCHOOLNorwich University: $13,500 · EducationNorwich University+5 more: $11,150 · Education+5 moreWORCESTER ART MUSEUM: $37,250 · Arts & CultureWORCESTER ART …PRESERVATION WORCESTER INC: $13,900 · Arts & CulturePRESERVATION W…ARTSWORCESTER INC: $6,250 · Arts & CultureARTSWORCESTER …NATIONAL MARINE LIFE CENTER INC: $5,500 · Arts & CultureNATIONAL MARIN…MUSIC WORCESTER INC: $4,000 · Arts & CultureROMANIAN AMERICAN HERITAGE CENTER: $3,900 · Arts & CultureWORCESTER NATURAL HISTORY SOCIETY INC: $3,325 · Arts & CultureWORCESTER HISTORICAL MUSEUM: $3,000 · Arts & CultureWORCESTER COUNTY HORTICULTURAL SOCIETY: $10,200 · EnvironmentMASSACHUSETTS AUDUBON SOCIETY INC: $9,250 · EnvironmentGREATER WORCESTER LAND TRUST: $6,500 · EnvironmentTHE GARDEN CLUB OF AMERICA: $1,600 · Environment+1 more: $150 · EnvironmentUMASS CHAN MEDICAL SCHOOL FOUNDATION INC: $9,800 · PhilanthropyICON MUSEUM AND STUDY CENTER INC: $5,000 · PhilanthropyGREATER WORCESTER COMMUNITY FOUNDATION INC: $1,250 · PhilanthropyDETECTOGETHER INC FORMERLY KNOWN AS THE 15-40 CONNECTION INC: $14,000 · HealthTHE BRAIN ANEURYSM FOUNDATION INC: $500 · HealthNATIONAL DOWN SYNDROME CONGRESS: $500 · HealthTHE ELEPHANT SANCTUARY IN TENNESSEE: $7,050 · AnimalsWORCESTER ANIMAL RESCUE LEAGUE INC: $4,500 · AnimalsSECOND CHANCE ANIMAL SERVICES INC: $1,200 · AnimalsTHE DAVID SHELDRICK WILDLIFE TRUST USA INC: $1,000 · Animals
Other$311,085Education$158,850Arts & Culture$77,125Environment$27,700Philanthropy$16,050Health$15,000Animals$13,750

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetAMERICAN ANTIQUARIAN SOCIETY: $61,000 over 8y, 0.2% of budgetPROVIDENCE COLLEGE: $48,000 over 5y, 0.0% of budgetWORCESTER ART MUSEUM: $37,250 over 9y, 0.0% of budgetBANCROFT SCHOOL: $25,200 over 6y, 0.1% of budgetDETECTOGETHER INC FORMERLY KNOWN AS THE 15-40 CONNECTION INC: $14,000 over 7y, 0.1% of budgetPRESERVATION WORCESTER INC: $13,900 over 9y, 1.4% of budgetNorwich University: $13,500 over 4y, 0.0% of budgetWORCESTER COUNTY HORTICULTURAL SOCIETY: $10,200 over 4y, 0.1% of budgetTHE BOSTON FOUNDATION FOR SIGHT INC: $10,000 over 9y, 0.0% of budgetMASSACHUSETTS AUDUBON SOCIETY INC: $9,250 over 7y, 0.0% of budgetSERVE SYRACUSE INC: $9,000 over 6y, 1.6% of budgetBE LIKE BRIT FOUNDATION INC: $8,000 over 9y, 0.1% of budgetTHE ELEPHANT SANCTUARY IN TENNESSEE: $7,050 over 9y, 0.0% of budgetGREATER WORCESTER LAND TRUST: $6,500 over 9y, 0.3% of budgetARTSWORCESTER INC: $6,250 over 7y, 0.3% of budgetNATIONAL MARINE LIFE CENTER INC: $5,500 over 7y, 0.1% of budgetWORCESTER COUNTY FOOD BANK INC: $5,000 over 6y, 0.0% of budgetICON MUSEUM AND STUDY CENTER INC: $5,000 over 2y, 0.2% of budgetWORCESTER ANIMAL RESCUE LEAGUE INC: $4,500 over 5y, 0.1% of budgetMUSIC WORCESTER INC: $4,000 over 3y, 0.1% of budgetROMANIAN AMERICAN HERITAGE CENTER: $3,900 over 8y, 1.2% of budgetSYRACUSE UNIVERSITY: $3,500 over 2y, 0.0% of budgetWORCESTER NATURAL HISTORY SOCIETY INC: $3,325 over 3y, 0.1% of budgetFriends of Hope Cemetery Inc: $3,150 over 9y, 6.5% of budgetHELLENIC ARTS SOCIETY INC CO ST SPYRIDON GREEK ORTHODOX CATHEDRAL: $3,150 over 8y, 2.4% of budgetMUSTARD SEED CATHOLIC WORKER COMMUNITY INC: $3,000 over 6y, 1.1% of budgetCROSSROAD INSTITUTE INC: $3,000 over 4y, 0.8% of budgetWORCESTER HISTORICAL MUSEUM: $3,000 over 3y, 0.1% of budgetPROJECT NEW HOPE INC: $2,000 over 4y, 0.1% of budgetHILLSDALE COLLEGE: $1,900 over 5y, 0.0% of budgetITHACA COLLEGE: $1,750 over 7y, 0.0% of budgetTHE GARDEN CLUB OF AMERICA: $1,600 over 5y, 0.0% of budgetGREATER WORCESTER COMMUNITY FOUNDATION INC: $1,250 over 1y, 0.0% of budgetSECOND CHANCE ANIMAL SERVICES INC: $1,200 over 2y, 0.0% of budgetTHE DAVID SHELDRICK WILDLIFE TRUST USA INC: $1,000 over 1y, 0.0% of budgetFordham University: $1,000 over 1y, 0.0% of budgetTHE BRAIN ANEURYSM FOUNDATION INC: $500 over 1y, 0.0% of budgetWHY ME INC: $500 over 1y, 0.0% of budgetNATIONAL DOWN SYNDROME CONGRESS: $500 over 1y, 0.1% of budgetFAITH HERITAGE SCHOOL: $500 over 2y, 0.0% of budgetCATHOLIC CHARITIES OF THE DIOCESE OF WORCESTER: $250 over 1y, 0.0% of budgetNATICK SERVICE COUNCIL INC: $250 over 1y, 0.0% of budgetAmerican National Red Cross & Its Constituent Chapters and Branches: $200 over 1y, 0.0% of budgetLUK CRISIS CENTER INC: $200 over 1y, 0.0% of budgetWACHUSETT GREENWAYS INC: $150 over 1y, 0.1% of budgetProject Just Because Inc: $100 over 1y, 0.0% of budgetROMANIAN CHILDREN'S RELIEF INC: $100 over 1y, 0.0% of budgetWachusett Food Pantry Inc: $100 over 1y, 0.2% of budget
Grantee by grantee: a decade per organization, before and after funding

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

  • Who funds AMERICAN ANTIQUARIAN SOCIETY ↗
  • Who funds PROVIDENCE COLLEGE ↗
  • Who funds WORCESTER ART MUSEUM ↗
  • Who funds BANCROFT SCHOOL ↗
  • Who funds DETECTOGETHER INC FORMERLY KNOWN AS THE 15-40 CONNECTION INC ↗
  • Who funds PRESERVATION WORCESTER INC ↗
  • Who funds Norwich University ↗
  • Who funds WORCESTER COUNTY HORTICULTURAL SOCIETY ↗
  • Who funds THE BOSTON FOUNDATION FOR SIGHT INC ↗
  • Who funds MASSACHUSETTS AUDUBON SOCIETY INC ↗
  • Who funds SERVE SYRACUSE INC ↗
  • Who funds BE LIKE BRIT FOUNDATION INC ↗
  • Who funds THE ELEPHANT SANCTUARY IN TENNESSEE ↗
  • Who funds GREATER WORCESTER LAND TRUST ↗
  • Who funds ARTSWORCESTER INC ↗
  • Who funds NATIONAL MARINE LIFE CENTER INC ↗
  • Who funds WORCESTER COUNTY FOOD BANK INC ↗
  • Who funds ICON MUSEUM AND STUDY CENTER INC ↗
  • Who funds WORCESTER ANIMAL RESCUE LEAGUE INC ↗
  • Who funds MUSIC WORCESTER INC ↗
  • Who funds ROMANIAN AMERICAN HERITAGE CENTER ↗
  • Who funds SYRACUSE UNIVERSITY ↗

Co-funders

Grantmakers whose grantees overlap with this funder’s far more than size alone predicts. Closer means stronger alignment; arcs show where they also fund each other. Here they form a tightly interlocked group: most of these funders back each other's grantees too.

Greater Worcester Community Foundation IncMA44.1× affinity19 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Greater Worcester Community Foundation Inc · Stoddard Charitable Trust · The Fletcher Foundation · The George I Alden Trust · The Fred Harris Daniels Foundation · Schwartz Charitable Foundation · Ruth H & Warren a Ellsworth Foundation · The C Jean & Myles McDonough Charitable Foundation · Coghlin Services Fund · United Way of Central Massachusetts Inc · Nathaniel Wheeler Tua-Worc · J Irving & Jane L England Charitable Trusta Molloy & F Russellco-Trustees

How this is measured
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. Overlap is association, not proof of shared intent.

How much its grantees rely on government

Each dot is one organization Tonna Charitable Trust funds: left to right is the share of its income from government, bottom to top the share from Tonna Charitable Trust. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 170%1%3%6%10%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →median 4%
  • Luk Crisis Center Inc: 95% of income from government
  • Wachusett Greenways Inc: 51% of income from government
  • Training Resources of America Inc: 44% of income from government
  • National Marine Life Center Inc: 16% of income from government
  • Preservation Worcester Inc: 10% of income from government
  • Worcester Natural History Society Inc: 8% of income from government
  • Music Worcester Inc: 7% of income from government
  • American Antiquarian Society: 7% of income from government
  • Worcester Historical Museum: 5% of income from government
  • Norwich University: 4% of income from government
  • Worcester County Horticultural Society: 2% of income from government
  • Artsworcester Inc: 2% of income from government
  • Massachusetts Audubon Society Inc: 1% of income from government
  • Worcester Art Museum: 1% of income from government
  • Worcester County Food Bank Inc: 1% of income from government
  • Greater Worcester Community Foundation Inc: 1% of income from government
  • Project Just Because Inc: 0% of income from government
  • The Boston Foundation for Sight Inc: 0% of income from government
  • Pan-Massachusetts Challenge Inc: 0% of income from government
no gov moneyreceives it· size = income
17get no government money at all
3report government grants on their 990 we could not trace to a source (not plotted)
2rely on government for over half their income
typical government reliance, FY20–25
How this is measured
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 a grant caused the public funding. Coverage is precision-first, a floor rather than 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 to 24 months.
05Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to Tonna Charitable Trust?

Find your warmest path to Tonna Charitable Trust 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 from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 105 grantees we resolved, each linked to its source. Grantee outcomes are each organization’s own program-service reporting (Form 990, Part III), read as association with funding, never as caused by it. Low-confidence name matches are suppressed rather than guessed. How we build these →

How this is measured
Each figure carries one of six labels. Filed is what the funder reported on its 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.

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

Source object · view filing

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