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Connecticut · Private foundation

Half Moon 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.

$316k
Granted FY2025(still arriving)
41
Grants FY2025
39
Organizations funded FY2024
3%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$3,000
Largest grant, FY2025
$102,000
Organizations funded a year
36 to 42
FY2018 to FY2024
States reached, FY2025
10
Total assets, FY2025
$1.1M
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 3% of the organizations Half Moon Foundation funded were first-time grantees, receiving 3% of its grant dollars.

New vs renewed · share of each year

In FY2024, 97% of grant dollars renewed an existing relationship; $10k went to new ones.

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

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

’18’19’20’21’22’23’24
EducationHealthEnvironmentArts & CultureFood & NutritionPublic BenefitOther
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 arriving38$304k5%
FY202439$322k3%
FY202338$254k0%
FY202238$227k3%
FY202138$299k16%
FY202042$358k17%
FY201936$337k14%
FY201838$238k13%
95% classified

What it funded, over time

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

Education$1.5MInternational$344kHealth$300kEnvironment$261kArts & Culture$86kReligion$65kHuman Services$56kYouth Development$53kOther$0

Where its grants go

Grant dollars by states, across the years we hold.

Which US states its grants reach

ME
MT
IL
WI
NY
MA
WY
CT
CA
CO
VA
MD
FL

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 New Canaan Library Inc$618,00092%
Millbrook School$502,50090%
Americares Foundation Inc$344,12090%
Williams College$197,00090%
Mass General Brigham Incorporated$110,0009n/a
Friends of Acadia$48,50090%
The New Canaan Country School Incorporated$45,00090%
National Louis University$40,00050%
The New Canaan Community Young Men's Christian Association Inc$30,50080%
Foxcroft School$21,00090%
Show all 42 grantees
All grantees of Half Moon Foundation by total granted
GranteeTotal grantedYearsShare of their budget
The New Canaan Library Inc$618,00092%
Millbrook School$502,50090%
Americares Foundation Inc$344,12090%
Williams College$197,00090%
Mass General Brigham Incorporated$110,0009n/a
Friends of Acadia$48,50090%
The New Canaan Country School Incorporated$45,00090%
National Louis University$40,00050%
The New Canaan Community Young Men's Christian Association Inc$30,50080%
Foxcroft School$21,00090%
New Canaan Nature Center Association Inc$20,50090%
Ecology Education Inc$20,00070%
Squashbridge Inc$20,00022%
Waveny Lifecare Network Inc$17,0002n/a
Atlantic Salmon Federation (US) Inc$16,00090%
Mass General Brigham Incorporated$14,5007n/a
Food Rescue US Inc$14,50060%
Bob Woodruff Family Foundation Inc$13,00090%
Hobart and William Smith Colleges$8,00040%
Voices of September 11 Inc$8,00080%
Waveny Care Center Inc$7,00070%
Mount Desert Island Hospital$6,00060%
Staying Put in New Canaan Inc$5,50070%
Cable Natural History Museum Inc$5,50090%
New Canaan Mounted Troop Inc$5,00040%
Dana-Farber Cancer Institute Inc$5,00010%
Veterans Expeditions Inc$5,0001n/a
National Forest Foundation$5,00010%
Islesford Boatworks$4,50082%
Milton Academy$4,50090%
North Shore Country Day School$4,30090%
Waveny Park Conservancy Inc$4,25050%
Duncan Louis Stewart Foundation Inc$4,00042%
The Garden Conservancy Inc$4,00080%
New Canaan Land Conservation Trust Inc$3,30020%
Read to Grow Inc$3,30060%
The Stamford Hospital$2,50010%
The Foundation Fighting Blindness Inc$2,00040%
The Elm Project$7502n/a
Metropolitan Museum of Art$50010%
Trustees of Deerfield Academy$50010%
The Ashley Bryan Center$30010%

What it could do for these grantees

Plus 18 recipients with no EIN on record ($426k), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget Half Moon Foundation supplied at peak.

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetThe New Canaan Library Inc: $618,000 over 9y, 2.4% of budgetMillbrook School: $502,500 over 9y, 0.4% of budgetAmericares Foundation Inc: $344,120 over 9y, 0.0% of budgetWilliams College: $197,000 over 9y, 0.0% of budgetFriends of Acadia: $48,500 over 9y, 0.1% of budgetThe New Canaan Country School Incorporated: $45,000 over 9y, 0.0% of budgetNational Louis University: $40,000 over 5y, 0.0% of budgetThe New Canaan Community Young Men's Christian Association Inc: $30,500 over 8y, 0.2% of budgetFoxcroft School: $21,000 over 9y, 0.1% of budgetNew Canaan Nature Center Association Inc: $20,500 over 9y, 0.2% of budgetEcology Education Inc: $20,000 over 7y, 0.2% of budgetSquashbridge Inc: $20,000 over 2y, 2.4% of budgetAtlantic Salmon Federation (US) Inc: $16,000 over 9y, 0.1% of budgetFood Rescue US Inc: $14,500 over 6y, 0.0% of budgetBob Woodruff Family Foundation Inc: $13,000 over 9y, 0.0% of budgetHobart and William Smith Colleges: $8,000 over 4y, 0.0% of budgetVoices of September 11 Inc: $8,000 over 8y, 0.2% of budgetWaveny Care Center Inc: $7,000 over 7y, 0.0% of budgetMount Desert Island Hospital: $6,000 over 6y, 0.0% of budgetStaying Put in New Canaan Inc: $5,500 over 7y, 0.3% of budgetCable Natural History Museum Inc: $5,500 over 9y, 0.2% of budgetNew Canaan Mounted Troop Inc: $5,000 over 4y, 0.1% of budgetDana-Farber Cancer Institute Inc: $5,000 over 1y, 0.0% of budgetNational Forest Foundation: $5,000 over 1y, 0.0% of budgetIslesford Boatworks: $4,500 over 8y, 1.8% of budgetMilton Academy: $4,500 over 9y, 0.0% of budgetNorth Shore Country Day School: $4,300 over 9y, 0.0% of budgetWaveny Park Conservancy Inc: $4,250 over 5y, 0.4% of budgetDuncan Louis Stewart Foundation Inc: $4,000 over 4y, 2.4% of budgetThe Garden Conservancy Inc: $4,000 over 8y, 0.0% of budgetNew Canaan Land Conservation Trust Inc: $3,300 over 2y, 0.4% of budgetRead to Grow Inc: $3,300 over 6y, 0.0% of budgetThe Stamford Hospital: $2,500 over 1y, 0.0% of budgetThe Foundation Fighting Blindness Inc: $2,000 over 4y, 0.0% of budgetMetropolitan Museum of Art: $500 over 1y, 0.0% of budgetTrustees of Deerfield Academy: $500 over 1y, 0.0% of budgetThe Ashley Bryan Center: $300 over 1y, 0.4% 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 37.

Nonprofits that may fit its grantmaking

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.

Hobbs Family Charitable TrustCT24.2× affinity9 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Hobbs Family Charitable Trust · New Canaan Community Foundation Inc · MLE Foundation Inc · Jim and Dede Bartlett Foundation · The Queenan Fdn Acct · The Rein Family Foundation Inc · Squier Family Foundation · The Morris Family Foundation · Jeniam Foundation · Fairfield County's Community Foundation Inc · The Kontulis Fund · The Ward Foundation Inc

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 Half Moon Foundation with peer funders

About Half Moon Foundation

How much does Half Moon Foundation give?
Half Moon Foundation reported 41 grants totaling $315,500 in its FY2025 IRS filing. It funded between 36 and 42 organizations a year over FY2018 to FY2024.
What does Half Moon Foundation fund?
By grant dollars over FY2017 to FY2025, its largest causes are Education (53%), International (12%), Health (11%).
Who are Half Moon Foundation's largest grantees?
By total granted over FY2017 to FY2025: The New Canaan Library Inc ($618k), Millbrook School ($503k), Americares Foundation Inc ($344k).
Does Half Moon Foundation fund new organizations?
In FY2024, 3% of the organizations it funded were first-time grantees.
Does Half Moon Foundation accept unsolicited applications?
Its most recent filing reports that it funds preselected organizations and does not take unsolicited requests. Check the foundation's own site before ruling it out.
Which funders back the same organizations as Half Moon Foundation?
Its strongest co-funders, measured against what their size predicts, include Hobbs Family Charitable Trust, New Canaan Community Foundation Inc, MLE Foundation Inc.
Where is Half Moon Foundation based?
Half Moon Foundation is based in CT.

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 63 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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