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Colorado · Private foundation

Brothers Brook 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.

$3.7M
Granted FY2025(still arriving)
54
Grants FY2025
54
Organizations funded FY2024
9%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$50,000
Largest grant, FY2025
$275,000
Organizations funded a year
29 to 54
FY2017 to FY2024
States reached, FY2025
10
Total assets, FY2025
$104M
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 9% of the organizations Brothers Brook Foundation funded were first-time grantees, receiving 5% of its grant dollars.

New vs renewed · share of each year

In FY2024, 95% of grant dollars renewed an existing relationship; $160k went to new ones.

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

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

’18’19’20’22’23’24
EducationHealthHuman ServicesEnvironmentPhilanthropyAnimalsOther
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 arriving52$3.2M8%
FY202454$3.4M9%
FY202352$3.5M23%
FY202252$3.0M31%
FY202038$2.6M24%
FY201937$2.1M22%
FY201829$2.2M17%
FY201736$1.6Mn/a
100% classified

What it funded, over time

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

Education$5.3MHealth$3.8MHuman Services$3.1MEnvironment$3.1MHousing & Shelter$1.9MSocial Science$1.8MYouth Development$1.1MPhilanthropy$991kOther$0

Where its grants go

Grant dollars by states, across the years we hold.

Which US states its grants reach

VT
NH
ID
IL
NY
MA
OR
OH
PA
CT
CA
UT
VA
TN
NC
DC
TX
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
Waterside School Inc$1,925,00084%
The Brookings Institution$1,525,00080%
Family Centers Inc$1,228,50081%
Mianus River Gorge Inc$1,165,160821%
Women in Need Inc$873,00080%
Domus Kids Inc$752,35081%
St Lawrence University$739,00070%
The Intrepid Fallen Heroes Fund$700,00053%
The Greenwich Land Trust Inc$605,800823%
New England College$590,00050%
Show all 87 grantees
All grantees of Brothers Brook Foundation by total granted
GranteeTotal grantedYearsShare of their budget
Waterside School Inc$1,925,00084%
The Brookings Institution$1,525,00080%
Family Centers Inc$1,228,50081%
Mianus River Gorge Inc$1,165,160821%
Women in Need Inc$873,00080%
Domus Kids Inc$752,35081%
St Lawrence University$739,00070%
The Intrepid Fallen Heroes Fund$700,00053%
The Greenwich Land Trust Inc$605,800823%
New England College$590,00050%
Part of the Solution$582,50081%
Icahn School of Medicine at Mount Sinai$475,00050%
Upsolve Inc$465,000517%
All Our Kin Inc$440,00081%
Als Therapy Development Foundation Inc$430,00081%
Abilis Inc$400,00080%
Family & Children's Agency Inc$375,00041%
Horizons at CT State Norwalk Inc$370,00088%
Pacific House Inc$365,86782%
Reboot Rx Inc$300,000417%
Phipps Neighborhoods Inc$300,00041%
The Rand Corporation$300,00030%
Project Als Inc$295,00082%
Shatterproof a Nonprofit Corporation$284,00061%
Guardian Revival Inc$275,00043%
Greenwich Adult Day Care Inc$255,00063%
Upchieve Inc$250,00043%
Boys & Girls Club of Stamford Inc$230,00032%
Brunswick School Inc$225,00050%
Urban Justice Center$225,00070%
Wild Salmon Center$175,00040%
Future 5 Inc$170,00072%
The Open Door Shelter Inc$151,00031%
Rebuilding Together Houston$150,00031%
Soundwaters Inc$145,00051%
The Conservation Fund a Nonprofit Corporation$145,00020%
Neighbor to Neighbor Inc$141,00071%
The Lower East Side Girls Club of New York Inc$140,00021%
United Way of Greenwich Inc$132,50081%
My Sisters Place Inc$130,00031%
High Watch Recovery Center Inc$130,00030%
Norwalk Community College Foundation Inc$126,00031%
The Freshwater Trust$125,00030%
The Carver Inc$120,90031%
Trio New College Network Inc$115,00031%
The Hope Program Inc$115,00031%
Teach for America Inc$105,00050%
Memorial Sloan-Kettering Cancer Center$100,00010%
United States Ski Team Foundation$100,00011%
The Posse Foundation Inc$100,00020%
Cornell University$90,00050%
United Way of Coastal and Western Connecticut Inc$80,00040%
Literacy Academy Collective Inc$75,00012%
Almost Fun Inc$75,000210%
Trout Unlimited Inc$67,50020%
Trout Unlimited Mianus Chapter$61,685337%
Empirical Resolution Inc$60,00022%
Robin Hood Foundation$60,00050%
Child Guidance Center of Southern Connecticut Inc$57,00011%
The Rowan Center Inc$55,00013%
The Food Bank of Lower Fairfield County Inc$52,00080%
Rebuilding Together Greater Florida Inc$50,00011%
Fund for the City of New York Inc$50,00010%
Friends of the Norwalk River Valley Trail Inc$45,00027%
The Ideal School of Manhattan$40,00010%
Greenwich Department of Human Services Fund Inc$40,000210%
Vermont Land Trust Inc$35,00010%
Spina Bifida Assoc of Western PA$30,00032%
Local Initiatives Support Corporation$30,00010%
American Academy of Dermatology Association Inc$30,00030%
Pond Mountain Trust Inc$25,00015%
Opportunities for a Better Tomorrow Inc$25,00010%
Greenwich Emergency Medical Service Inc$20,00020%
Mount Vernon Neighborhood Health Center Inc$20,00020%
Girls With Impact Inc$15,00030%
American Academy of Dermatology Inc$15,00010%
Save the Sound$10,00010%
Rare$10,00010%
Prime Coalition Inc$10,00010%
Sos Children's Villages-Usa Inc$5,00010%
Person to Person Inc$5,0001n/a
Project Big Wood a Nonprofit Corporation$5,00011%
New Canaan Group Home Inc$4,75040%
The Community Fund of Darien$2,50010%
BACKCOUNTRY CONCERTS INC dba BACKCOUNTRY JAZZ$2,50011%
Trustees of the Convent of the Sacred Heart Inc$1,0002n/a
Swim Across America Inc$50010%

What it could do for these grantees

Plus 8 recipients with no EIN on record ($864k), not named here.

Where it is load-bearing

Brothers Brook Foundation supplied at least a quarter of the budget for 1 of its grantees at some point. The chart plots its 85 largest grantees; load-bearing ones sit top left.

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetWaterside School Inc: $1,925,000 over 8y, 3.6% of budgetThe Brookings Institution: $1,525,000 over 8y, 0.4% of budgetFamily Centers Inc: $1,228,500 over 8y, 0.9% of budgetMianus River Gorge Inc: $1,165,160 over 8y, 21% of budgetWomen in Need Inc: $873,000 over 8y, 0.1% of budgetDomus Kids Inc: $752,350 over 8y, 1.4% of budgetSt Lawrence University: $739,000 over 7y, 0.1% of budgetThe Intrepid Fallen Heroes Fund: $700,000 over 5y, 2.9% of budgetThe Greenwich Land Trust Inc: $605,800 over 8y, 23% of budgetNew England College: $590,000 over 5y, 0.4% of budgetPart of the Solution: $582,500 over 8y, 1.3% of budgetIcahn School of Medicine at Mount Sinai: $475,000 over 5y, 0.0% of budgetUpsolve Inc: $465,000 over 5y, 17% of budgetAll Our Kin Inc: $440,000 over 8y, 1.1% of budgetAls Therapy Development Foundation Inc: $430,000 over 8y, 0.9% of budgetAbilis Inc: $400,000 over 8y, 0.2% of budgetFamily & Children's Agency Inc: $375,000 over 4y, 0.7% of budgetHorizons at CT State Norwalk Inc: $370,000 over 8y, 8.4% of budgetPacific House Inc: $365,867 over 8y, 1.9% of budgetReboot Rx Inc: $300,000 over 4y, 17% of budgetPhipps Neighborhoods Inc: $300,000 over 4y, 0.5% of budgetThe Rand Corporation: $300,000 over 3y, 0.0% of budgetProject Als Inc: $295,000 over 8y, 1.8% of budgetShatterproof a Nonprofit Corporation: $284,000 over 6y, 0.6% of budgetGuardian Revival Inc: $275,000 over 4y, 2.8% of budgetGreenwich Adult Day Care Inc: $255,000 over 6y, 3.2% of budgetUpchieve Inc: $250,000 over 4y, 2.7% of budgetBoys & Girls Club of Stamford Inc: $230,000 over 3y, 1.9% of budgetBrunswick School Inc: $225,000 over 5y, 0.1% of budgetUrban Justice Center: $225,000 over 7y, 0.1% of budgetWild Salmon Center: $175,000 over 4y, 0.5% of budgetFuture 5 Inc: $170,000 over 7y, 2.0% of budgetThe Open Door Shelter Inc: $151,000 over 3y, 1.4% of budgetRebuilding Together Houston: $150,000 over 3y, 1.2% of budgetSoundwaters Inc: $145,000 over 5y, 1.2% of budgetThe Conservation Fund a Nonprofit Corporation: $145,000 over 2y, 0.0% of budgetNeighbor to Neighbor Inc: $141,000 over 7y, 0.9% of budgetThe Lower East Side Girls Club of New York Inc: $140,000 over 2y, 1.1% of budgetUnited Way of Greenwich Inc: $132,500 over 8y, 1.0% of budgetMy Sisters Place Inc: $130,000 over 3y, 0.9% of budgetHigh Watch Recovery Center Inc: $130,000 over 3y, 0.3% of budgetNorwalk Community College Foundation Inc: $126,000 over 3y, 1.0% of budgetThe Freshwater Trust: $125,000 over 3y, 0.4% of budgetThe Carver Inc: $120,900 over 3y, 0.5% of budgetTrio New College Network Inc: $115,000 over 3y, 1.1% of budgetThe Hope Program Inc: $115,000 over 3y, 0.6% of budgetTeach for America Inc: $105,000 over 5y, 0.0% of budgetMemorial Sloan-Kettering Cancer Center: $100,000 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 85.

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.

Fairfield County's Community Foundation IncCT43.6× affinity20 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Fairfield County's Community Foundation Inc · The Near and Far Association Inc · The Herbert & Nell Singer Foundation Inc · New Canaan Community Foundation Inc · Viking Global Foundation Inc · Peoples United Community Foundation · Lone Pine Foundation Inc · The Tudor Foundation Inc · The Pitney Bowes Foundation · Impact 100 Fairfield County · The Goodnow Fund · The Scripps Family Fund for Education and the Arts

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 Brothers Brook Foundation with peer funders

Warm introductions · Powered by PlinthPlus

How do I get to Brothers Brook Foundation?

Find your warmest path to Brothers Brook 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.

About Brothers Brook Foundation

How much does Brothers Brook Foundation give?
Brothers Brook Foundation reported 54 grants totaling $3,691,000 in its FY2025 IRS filing. It funded between 29 and 54 organizations a year over FY2017 to FY2024.
What does Brothers Brook Foundation fund?
By grant dollars over FY2017 to FY2025, its largest causes are Education (21%), Health (15%), Human Services (12%).
Who are Brothers Brook Foundation's largest grantees?
By total granted over FY2017 to FY2025: Waterside School Inc ($1.9M), The Brookings Institution ($1.5M), Family Centers Inc ($1.2M).
Does Brothers Brook Foundation fund new organizations?
In FY2024, 9% of the organizations it funded were first-time grantees.
Does Brothers Brook 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 Brothers Brook Foundation?
Its strongest co-funders, measured against what their size predicts, include Fairfield County's Community Foundation Inc, The Near and Far Association Inc, The Herbert & Nell Singer Foundation Inc.
Where is Brothers Brook Foundation based?
Brothers Brook Foundation is based in CO.

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 99 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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