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Massachusetts · Private foundation

Clara B Winthrop Charitable Trust

Its FY2025 filing reports that it accepted unsolicited grant applications.

$278k
Granted FY2025(still arriving)
28
Grants FY2025
28
Organizations funded FY2024
0%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$10,080
Largest grant, FY2025
$15,840
Organizations funded a year
27 to 28
FY2018 to FY2024
States reached, FY2025
3
Total assets, FY2025
$3.8M
Applications
Takes unsolicited applications
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 0% of the organizations Clara B Winthrop Charitable Trust funded were first-time grantees, receiving 0% of its grant dollars.

New vs renewed · share of each year

In FY2024, 100% of grant dollars renewed an existing relationship; $0 went to new ones.

50%100%’18’19’20’21’22’23’24
RenewedFirst-time
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.
The numbers by year
Fiscal yearOrganizations fundedTo those organizationsFirst-time grantees
FY2025still arriving28$278k4%
FY202428$275k0%
FY202328$210k0%
FY202228$200k0%
FY202127$230k0%
FY202028$200k0%
FY201928$200k0%
FY201828$200k4%
93% classified

What it funded, over time

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

Arts & Culture$532kEducation$365kHealth$358kEnvironment$129kPublic Benefit$100kAnimals$74kScience & Tech$74kYouth Development$69kOther$0

Top grantees

Largest recipients by total granted, FY2017 to FY2025, and the share of each one’s budget the grants supplied at peak.

GranteeTotal grantedYearsShare of their budget
The Trustees of Reservations$91,73890%
Massachusetts Historical Society$89,13590%
Bowdoin College$89,13590%
Children's Hospital Corporation$89,13590%
Mass General Brigham Incorporated$79,1209n/a
New England Aquarium Corporation$74,39390%
Museum of Science$74,39390%
Manchester-By-The-Sea Museum Inc$70,105911%
Society for the Preservation of New Engl$69,10590%
Manchester Community Center$60,025824%
Show all 19 grantees
All grantees of Clara B Winthrop Charitable Trust by total granted
GranteeTotal grantedYearsShare of their budget
The Trustees of Reservations$91,73890%
Massachusetts Historical Society$89,13590%
Bowdoin College$89,13590%
Children's Hospital Corporation$89,13590%
Mass General Brigham Incorporated$79,1209n/a
New England Aquarium Corporation$74,39390%
Museum of Science$74,39390%
Manchester-By-The-Sea Museum Inc$70,105911%
Society for the Preservation of New Engl$69,10590%
Manchester Community Center$60,025824%
The Epiphany School Inc$56,59390%
The Winsor School$50,07590%
The Home for Little Wanderers Inc$50,07590%
New England Conservatory of Music$48,86390%
Friends of Manchester Trees$37,575621%
Peabody Essex Museum Inc$20,00040%
Navigator Foundation Inc$17,2308n/a
Seed Global Health$13,80390%
National Public Radio Inc$7,20010%

What it could do for these grantees

Plus 12 recipients with no EIN on record ($896k), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget Clara B Winthrop Charitable Trust supplied at peak.

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetThe Trustees of Reservations: $91,738 over 9y, 0.0% of budgetMassachusetts Historical Society: $89,135 over 9y, 0.3% of budgetBowdoin College: $89,135 over 9y, 0.0% of budgetChildren's Hospital Corporation: $89,135 over 9y, 0.0% of budgetNew England Aquarium Corporation: $74,393 over 9y, 0.0% of budgetMuseum of Science: $74,393 over 9y, 0.0% of budgetManchester-By-The-Sea Museum Inc: $70,105 over 9y, 11% of budgetSociety for the Preservation of New Engl: $69,105 over 9y, 0.1% of budgetManchester Community Center: $60,025 over 8y, 24% of budgetThe Epiphany School Inc: $56,593 over 9y, 0.1% of budgetThe Winsor School: $50,075 over 9y, 0.0% of budgetThe Home for Little Wanderers Inc: $50,075 over 9y, 0.0% of budgetNew England Conservatory of Music: $48,863 over 9y, 0.0% of budgetFriends of Manchester Trees: $37,575 over 6y, 21% of budgetPeabody Essex Museum Inc: $20,000 over 4y, 0.0% of budgetSeed Global Health: $13,803 over 9y, 0.1% of budgetNational Public Radio Inc: $7,200 over 1y, 0.0% of budget

Tap a dot to name the grantee.

How this is measured
Share of budget is the funder’s grant in a year over the grantee’s total revenue that year, at its highest across the years we hold; revenue is from all sources. Only grantees confirmed against their own filings, whose grants do not exceed their revenue, are plotted: the largest 17.

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.

Fidelity Investments Charitable Gift FundMA6.1× affinity6 shared granteesties to 1 of 1Hover any node to trace its alignments.Compare side by side →

Open a dossier: Fidelity Investments Charitable Gift Fund · Amazonsmile Foundation

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.

Compare Clara B Winthrop Charitable Trust with peer funders

Warm introductions · Powered by PlinthPlus

How do I get to Clara B Winthrop Charitable Trust?

Find your warmest path to Clara B Winthrop 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.

About Clara B Winthrop Charitable Trust

How much does Clara B Winthrop Charitable Trust give?
Clara B Winthrop Charitable Trust reported 28 grants totaling $277,920 in its FY2025 IRS filing. It funded between 27 and 28 organizations a year over FY2018 to FY2024.
What does Clara B Winthrop Charitable Trust fund?
By grant dollars over FY2017 to FY2025, its largest causes are Arts & Culture (27%), Education (18%), Health (18%).
Who are Clara B Winthrop Charitable Trust's largest grantees?
By total granted over FY2017 to FY2025: The Trustees of Reservations ($92k), Massachusetts Historical Society ($89k), Bowdoin College ($89k).
Does Clara B Winthrop Charitable Trust fund new organizations?
In FY2024, 0% of the organizations it funded were first-time grantees.
Does Clara B Winthrop Charitable Trust accept unsolicited applications?
Its most recent filing reports that it accepts unsolicited grant applications.
Which funders back the same organizations as Clara B Winthrop Charitable Trust?
Its strongest co-funders, measured against what their size predicts, include Fidelity Investments Charitable Gift Fund, Amazonsmile Foundation.
Where is Clara B Winthrop Charitable Trust based?
Clara B Winthrop Charitable Trust is based in MA.

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 31 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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