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· 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 FY2025still arriving
54
Grants FY2025still arriving
10
States reached
$275k
Largest
01What you fundRead
02The needRead
03Your edgeRead
04Your fieldRead
05Through PlinthRead
01What you fund
01100% classified

What you funded, over time

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

Education$5.3MHealth$3.8MHuman Services$3.1MEnvironment$3.1MHousing & Shelter$1.9MSocial Science$1.8MYouth Development$1.1MPhilanthropy$991kOther$0
02FY2025 · 54 grants

Where the money goes

Your grants by size, and where they go.

By grant size · FY2025

  • Under $10k4 grants · $19k
  • $10k–50k17 grants · $400k
  • $50k–250k32 grants · $3.0M
  • $250k+1 grant · $275k
$50,000
Median grant
10
States reached
$104M
Total assets
Largest grants
RecipientAmount
FIDELITY INVESTMENTS CHARITABLE GIFT FUND$275,000
NATURE CONSERVANCY INC$200,000
FAMILY CENTERS INC$195,000
BROOKINGS INSTITUTION$195,000
PART OF THE SOLUTION INC$160,000
ST LAWRENCE UNIVERSITY$152,000
WATERSIDE SCHOOL INC$150,000
WOMEN IN NEED INC$150,000
DOMUS KIDS INC$125,000
FAMILY & CHILDREN'S AGENCY INC$100,000
PHIPPS NEIGHBORHOODS$100,000
BOYS & GIRLS CLUB OF STAMFORD INC$100,000
ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI$100,000
GUARDIAN REVIVAL INC$100,000
REBOOT RX INC$100,000
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 (FY17–25, $1.6M) land where the poverty rate runs at 13%, against an area that typically sits at 12%. 53% of those dollars go to grantees based in above-average-need neighborhoods. Your grants spread fairly evenly across need levels.

area typical 12%RIVER HOUSE ADULT DAY CENTER: $50k → 9%RIVER HOUSE ADULT DAY CENTER: $50k → 9%RIVER HOUSE ADULT DAY CENTER: $40k → 9%River House Adult Day Center: $40k → 9%RIVER HOUSE ADULT DAY CENTER: $40k → 9%Greenwich Adult Day Care Inc: $35k → 9%PRIME COALITION INC: $10k → 8%Women In Need Inc: $100k → 17%Women In Need Inc: $75k → 17%Women In Need Inc: $50k → 17%WOMEN IN NEED INC: $150k → 17%WOMEN IN NEED INC: $150k → 17%WOMEN IN NEED INC: $135k → 17%WOMEN IN NEED INC: $110k → 17%Women in Need Inc: $100k → 17%Women in Need Inc: $3k → 17%NEW CANAAN GROUP HOME INC: $2k → 9%NEW CANAAN GROUP HOME INC: $1k → 9%NEW CANAAN GROUP HOME INC: $1k → 9%NEW CANAAN GROUP HOME INC: $750 → 9%FAMILY & CHILDREN'S AGENCY INC: $100k → 9%FAMILY & CHILDREN'S AGENCY INC: $100k → 9%FAMILY & CHILDREN'S AGENCY INC: $100k → 9%FAMILY & CHILDREN'S AGENCY INC: $75k → 9%CARVER FOUNDATION OF NORWALK INC: $50k → 9%CARVER FOUNDATION OF NORWALK INC: $46k → 9%CARVER FOUNDATION OF NORWALK INC: $25k → 9%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

VT
NH
ID
IL
NY
MA
OR
OH
PA
CT
CA
UT
VA
TN
NC
DC
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.

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.

96%of every dollar goes to organizations you’ve funded before.
$21M · 68 repeat orgs$818k to everyone else

68 repeat relationships — 48 still active in FY2025, 20 since wound down; 4 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

68
23

Total granted

$21M
$673k

Median revenue growth · since first grant

+18%
+19%

Still filing today

93%
78%

New vs renewed · share of each year

In FY2025, 95% of grant dollars renewed an existing relationship; $145k went to new ones.

50%100%’17’18’19’20’22’23’24’25
RenewedFirst-time

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

’17’18’19’20’22’23’24’25
EducationHealthEnvironmentPhilanthropyHuman 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

  • WS
    WATERSIDE SCHOOL INC
    8× · 2017–2025 · $1.9M · revenue +34%
  • TB
    THE BROOKINGS INSTITUTION
    8× · 2017–2025 · $1.5M · revenue +2%
  • FC
    FAMILY CENTERS INC
    8× · 2017–2025 · $1.2M · revenue +141%

Funded once

  • US
    United States Ski Team Foundationgraduated
    one grant, 2017 · $100k · revenue +69%
  • MEMORIAL SLOAN-KETTERING CANCER CENTERgraduated
    one grant, 2019 · $100k · revenue +82%
  • CG
    CHILD GUIDANCE CENTER OF SOUTHERN CONNECTICUT INC
    one grant, 2019 · $57k · revenue -98%

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
University of New Haven

The University of New Haven is a student-centered comprehensive university with an emphasis on excellence in liberal arts and professional education. Our mission is to prepare our students to lead purposeful and fulfilling lives in a…

Education
2
Stony Brook Internists University Faculty Practice Corporation

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
3
Stony Brook Urology University Faculty Practice Corporation

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
4
Northeast College of Health Sciences

Northeast college of health sciences (the college) is committed to academic excellence, leadership, and professional best practices in the health sciences.

Education
5
Stony Brook Surgical Associates University Faculty Practice Corporation

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
6
Neurology Associates of Stony Brook University Faculty Practice Corp

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
7
Stony Brook Ophthalmology University Faculty Practice Corporation

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
8
Stony Brook Childrens Services University Faculty Practice Corporation

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
9
Furman University

The primary mission of furman as a liberal arts institution is to provide a distinctive education in fine arts, humanities, social sciences, mathematics and the sciences, as well as selected professional disciplines.

Education
10
Stony Brook Orthopedic Associates University Faculty Practice Corporation

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
11
University Associates in Obstetrics and Gynecology University Faculty Pract ice Corporation

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
12
Fordham University

Fordham university, the jesuit university of new york, is committed to the discovery of wisdom and the transmission of learning, through research and through education of the highest quality. for more information, see schedule o.

Education

For reference, the grantee most central to the portfolio’s shape is Local Initiatives Support Corporation and the most unlike its peers is Pond Mountain Trust Inc. 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 backsteadyCommunity FoundationsChild Abuse Advocacy Servic…Faith-Based Liberal Arts Co…Youth Development CentersIndependent K-12 SchoolsDomestic Violence ServicesAffordable Housing Construc…Cancer Support ServicesWomen & Girls Leadership De…Senior Support ServicesDevelopmental Disabilities …Food Banks and PantriesUnited Way AffiliatesAddiction Recovery ServicesMilitary Veterans SupportAffordable Housing Developm…Environmental Conservation …
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 40 years old; the field is 16. You back the established end — and your money leans older still.

THE FIELDby orgYOUR GRANTEESby number22%2%<5yr14%10%5–10yr19%6%10–20yr16%22%20–35yr13%31%35–55yr16%29%55yr+
THE FIELDby orgYOUR MONEYby value22%0%<5yr14%9%5–10yr19%3%10–20yr16%28%20–35yr13%27%35–55yr16%34%55yr+

The field is 22% startups (under 5 years old) — 2% of your grantees by number, and just 0% of your money.

Closures · last 5 years

The orgs you fund almost never close — 2% lost their exemption, against 13% of the field you don’t fund.

orgs you fund
2%2/91
the rest of the field
13%
240,394/1,819,474

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.

04the grantee network

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

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 2017–2026, not grant rows in a single year — so this will not match the grant count on the cover. 90 of the 99 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.

1
Load-bearing (≥25% of a budget)
16
Early backer (in before they grew)
89/90
Grantees still filing
60/90
Grew since you first funded

Where your money sits — by cause, then by grantee

WATERSIDE SCHOOL INC — $1,925,000 · EducationWATERSIDE SCHOOL INCST LAWRENCE UNIVERSITY — $739,000 · EducationST LAWRENCE UNIVERSITYNew England College — $590,000 · EducationNew England CollegeICAHN SCHOOL OF MEDICINE AT MOUNT SINAI — $475,000 · EducationICAHN SCHOOL OF MEDICINE AT M…ALL OUR KIN INC — $440,000 · EducationALL OUR KIN INCHorizons at CT State Norwalk Inc — $370,000 · EducationHorizons at CT State Norwalk …UPCHIEVE INC — $250,000 · EducationBRUNSWICK SCHOOL INC — $225,000 · Education+10 more — $801,000 · Education+10 moreFAMILY CENTERS INC — $1,228,500 · OtherFAMILY CENTERS INCDOMUS KIDS INC — $752,350 · OtherDOMUS KIDS INCMEMORIAL SLOAN KETTERING CANCER CENTER — $554,000 · OtherMEMORIAL SLOAN KETTERING CANCER CENTERTHE INTREPID FALLEN HEROES FUND — $700,000 · OtherTHE INTREPID FALLEN HEROES FUNDPACIFIC HOUSE INC — $365,867 · OtherFIDELITY INVESTMENTS CHARITABLE GIFT FUND — $650,000 · OtherFIDELITY INVESTMENTS CHARITABLE GIFT FUNDPART OF THE SOLUTION — $582,500 · OtherPART OF THE SOLUTIONUPSOLVE INC — $465,000 · Other+42 more — $3,855,200 · Other+42 moreALS THERAPY DEVELOPMENT FOUNDATION INC — $430,000 · HealthALS THERA…ABILIS INC — $400,000 · HealthABILIS IN…Reboot Rx Inc — $300,000 · HealthReboot Rx…PROJECT ALS INC — $295,000 · HealthPROJECT A…SHATTERPROOF A NONPROFIT CORPORATION — $284,000 · HealthSHATTERPR…MEMORIAL SLOAN-KETTERING CANCER CENTER — $100,000 · Health+4 more — $95,000 · HealthWOMEN IN NEED INC — $873,000 · Human ServicesFAMILY & CHILDREN'S AGENCY INC — $375,000 · Human ServicesGREENWICH ADULT DAY CARE INC — $255,000 · Human ServicesTHE CARVER INC — $120,900 · Human Services+2 more — $14,750 · Human ServicesMIANUS RIVER GORGE INC — $1,165,160 · AnimalsWILD SALMON CENTER — $175,000 · AnimalsTHE FRESHWATER TRUST — $125,000 · AnimalsTROUT UNLIMITED INC — $67,500 · AnimalsTROUT UNLIMITED MIANUS CHAPTER — $61,685 · AnimalsTHE BROOKINGS INSTITUTION — $1,525,000 · Social ScienceTHE GREENWICH LAND TRUST INC — $605,800 · EnvironmentTHE CONSERVATION FUND A NONPROFIT CORPORATION — $145,000 · EnvironmentSOUNDWATERS INC — $145,000 · EnvironmentFriends of the Norwalk River Valley Trail Inc — $45,000 · EnvironmentVERMONT LAND TRUST INC — $35,000 · Environment+4 more — $50,000 · Environment
Education$5,815,000Other$9,153,417Health$1,904,000Human Services$1,638,650Animals$1,594,345Social Science$1,525,000Environment$1,025,800

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

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ your 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 budgetFIDELITY INVESTMENTS CHARITABLE GIFT FUND — $650,000 over 7y, 0.0% 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 budgetTHE NATURE CONSERVANCY — $300,000 over 2y, 0.0% 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 budgetURBAN JUSTICE CENTER — $225,000 over 7y, 0.1% of budgetBRUNSWICK SCHOOL INC — $225,000 over 5y, 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 budgetTHE CONSERVATION FUND A NONPROFIT CORPORATION — $145,000 over 2y, 0.0% of budgetSOUNDWATERS INC — $145,000 over 5y, 1.2% 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 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 WATERSIDE SCHOOL INC ↗
  • Who funds THE BROOKINGS INSTITUTION ↗
  • Who funds FAMILY CENTERS INC ↗
  • Who funds MIANUS RIVER GORGE INC ↗
  • Who funds WOMEN IN NEED INC ↗
  • Who funds DOMUS KIDS INC ↗
  • Who funds ST LAWRENCE UNIVERSITY ↗
  • Who funds THE INTREPID FALLEN HEROES FUND ↗
  • Who funds FIDELITY INVESTMENTS CHARITABLE GIFT FUND ↗
  • Who funds THE GREENWICH LAND TRUST INC ↗
  • Who funds New England College ↗
  • Who funds PART OF THE SOLUTION ↗
  • Who funds ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI ↗
  • Who funds UPSOLVE INC ↗
  • Who funds ALL OUR KIN INC ↗
  • Who funds ALS THERAPY DEVELOPMENT FOUNDATION INC ↗
  • Who funds ABILIS INC ↗
  • Who funds FAMILY & CHILDREN'S AGENCY INC ↗
  • Who funds Horizons at CT State Norwalk Inc ↗
  • Who funds PACIFIC HOUSE INC ↗
  • Who funds THE NATURE CONSERVANCY ↗
  • Who funds Reboot Rx Inc ↗
  • Who funds PHIPPS NEIGHBORHOODS INC ↗
  • Who funds The Rand Corporation ↗
  • Who funds PROJECT ALS INC ↗
  • Who funds SHATTERPROOF A NONPROFIT CORPORATION ↗
  • Who funds GUARDIAN REVIVAL INC ↗
  • Who funds GREENWICH ADULT DAY CARE INC ↗
  • Who funds UPCHIEVE INC ↗
  • Who funds BOYS & GIRLS CLUB OF STAMFORD INC ↗
  • Who funds URBAN JUSTICE CENTER ↗
  • Who funds BRUNSWICK SCHOOL INC ↗
  • Who funds WILD SALMON CENTER ↗
  • Who funds FUTURE 5 INC ↗
  • Who funds THE OPEN DOOR SHELTER INC ↗
  • Who funds Rebuilding Together Houston ↗
  • Who funds THE CONSERVATION FUND A NONPROFIT CORPORATION ↗
  • Who funds SOUNDWATERS INC ↗

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.

Fairfield County's Co…The Near and Far Asso…The Herbert & Nell Si…New Canaan Community …Viking Global Foundat…Peoples United Commun…Lone Pine Foundation …The Tudor Foundation …The Pitney Bowes Foun…Impact 100 Fairfield …The Goodnow FundThe Scripps Family Fu…
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

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 Brothers Brook 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 · 160%2%6%14%25%your share of their income ↑0%25%50%75%100%share of the org’s income from government →median 14%
  • Abilis Inc — 74% of income from government
  • Wild Salmon Center — 49% of income from government
  • Family & Children's Agency Inc — 47% of income from government
  • Pacific House Inc — 46% of income from government
  • Vermont Land Trust Inc — 42% of income from government
  • Save the Sound — 37% of income from government
  • Family Centers Inc — 20% of income from government
  • Boys & Girls Club of Stamford Inc — 17% of income from government
  • The Freshwater Trust — 17% of income from government
  • The Carver Inc — 16% of income from government
  • The Open Door Shelter Inc — 14% of income from government
  • United Way of Coastal and Western Connecticut Inc — 11% of income from government
  • The Community Fund of Darien — 9% of income from government
  • Als Therapy Development Foundation Inc — 8% of income from government
  • Domus Kids Inc — 7% of income from government
  • Person to Person Inc — 5% of income from government
  • Soundwaters Inc — 4% of income from government
  • Shatterproof a Nonprofit Corporation — 2% of income from government
  • Trio New College Network Inc — 2% of income from government
  • All Our Kin Inc — 1% of income from government
  • High Watch Recovery Center Inc — 0% of income from government
no gov moneyreceives it· size = income
16get no government money at all
22report government grants on their 990 we could not trace to a source (not plotted)
1rely 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 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.

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 99 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 2025, released 2025. 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 camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home
State money flows
the interactive map of money crossing state lines