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Plinth

· Private foundation

Firehole Foundation

Its FY2025 filing reports that it accepted unsolicited grant applications.

$180k
Granted FY2025still arriving
22
Grants FY2025still arriving
13
States reached
$50k
Largest
01What you fund
0199% classified

What you funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year — across FY20172025.

Education$266kPublic Benefit$51kHealth$44kScience & Tech$35kPublic Safety & Disaster$32kRecreation & Sports$32kInternational$29kHousing & Shelter$25kOther$0
02FY2025 · 22 grants

Where the money goes

Your grants by size, and where they go.

By grant size · FY2025

  • Under $10k16 grants · $26k
  • $10k–50k5 grants · $104k
  • $50k–250k1 grant · $50k
$2,000
Median grant
13
States reached
$3.3M
Total assets
Largest grants
RecipientAmount
CARDIGAIN MOUNTAIN SCHOOL$50,000
COLUMBIA INDEPENDENT SCHOOL$38,380
STANFORD UNIVERSITY HOOVER INSTITUT$25,000
BAPTIST HEALTH SOUTH FLORIDA FOUNDA$20,000
KAPPA DELTA FOUNDATION$11,000
CENTRAL MO HUMANE SOCIETY$10,000
COPA SAFETY AND EDUCATION FOUNDATIO$5,000
EMPOWERS AFRICA$5,000
FOOD BANK FOR CENTRAL AND NORTHEAST$2,341
COLBY FUND$2,300
GREATER PITTSBURGH FOOD BANK$2,000
UNIVERSITY OF PITTSBURGH$2,000
AMERICAN CANCER SOCIETY$2,000
NORTHWEST FILM FORUM$1,000
TRYPS CHILDRENS THEATER$1,000
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:

Dollar for dollar, your grants (FY17–25) land where the poverty rate runs at 12%, against an area that typically sits at 11%. 43% of your dollars go to grantees based in above-average-need neighborhoods. Your grants spread fairly evenly across need levels.

area typical 11%Stanford University Hoover Institut: $25k → 8%AUTISM SPEAKS: $2k → 17%FRIENDSHIP CIRCLE MIAMI: $5k → 15%COLUMBIA INDEPENDENT SCHOOL: $38k → 17%GENERATION SOS: $5k → 9%KAPPA DELTA FOUNDATION: $11k → 17%COPA SAFETY AND EDUCATION FOUNDATIO: $5k → 16%AMERICAN CANCER SOCIETY: $2k → 13%BALL STATE UNIVERSITY FOUNDATION: $2k → 19%UNIVERSITY SCHOOL: $2k → 17%COPA SAFETY AND EDUCATIONAL FOUNDAT: $2k → 8%COLBY COLLEGE: $2k → 12%COLBY FUND: $2k → 13%GREATER PITTSBURGH FOOD BANK: $2k → 11%STANFORD UNIVERSITY HOOVER INSTITUT: $25k → 8%COLUMBIA INDEPENDENT SCHOOL: $22k → 17%KAPPA DELTA FOUNDATION: $5k → 17%Second Amendment Foundation: $2k → 9%WILDLIFE HERITAGE FOUNDATION OF NEW HAMPSHIRE: $3k → 7%UNIVERSITY OF PITTSBURGH: $2k → 11%HOOVER INSTITUTION: $10k → 8%COLUMBIA INDEPENDENT SCHOOL: $15k → 17%TOWN OF LYME: $50k → 10%STANFORD UNIVERSITY HOOVER INSTITUT: $10k → 8%AMERICAN FRIENDS OF MAGEN DAVID ADO: $5k → 17%COLUMBIA INDEPENDENT SCHOOL: $10k → 17%TOWN OF LYME NH: $15k → 10%EMPOWERS AFRICA: $9k → 17%BREAKTHROUGH MIAMI: $3k → 15%CENTRAL MO HUMANE SOCIETY: $10k → 17%HOLDERNESS SCHOOL: $10k → 10%EMPOWERS AFRICA: $5k → 17%BREAKTHROUGH MIAMI: $3k → 15%FOOD BANK FOR CENTRAL AND NORTHEAST: $2k → 17%LYME (NH) HISTORIANS: $3k → 10%EMPOWERS AFRICA: $5k → 17%HOLDERNESS SCHOOL: $5k → 10%EMPOWERS AFRICA: $5k → 17%BAPTIST HEALTH SOUTH FLORIDA FOUNDA: $20k → 15%TOWN OF HANOVER NH: $24k → 10%CARDIGAIN MOUNTAIN SCHOOL: $50k → 10%CARDIGAN MOUNTAIN SCHOOL: $50k → 10%CARE ELEMENTARY SCHOOL: $4k → 15%VISIONS FOR CREATIVE HOUSING: $25k → 10%CARE ELEMENTARY SCHOOL: $3k → 15%CARDIGAN MOUNTAIN SCHOOL: $5k → 10%DOLPHIN CANCER CHALLENGE: $5k → 15%BIG BROTHERS BIG SISTERS MIAMI: $2k → 15%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

ME
VT
NH
WA
IL
NY
MA
OR
WY
IN
OH
PA
NJ
CT
CA
CO
MO
MD
AZ
TN
NC
DC
GA
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.

61%of every dollar goes to organizations you’ve funded before.
$354k · 24 repeat orgs$228k to everyone else

And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +34% since the first grant, against +10% for the ones you funded once.

24 repeat relationships — 9 still active in FY2025, 15 since wound down; 13 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

24
61

Total granted

$354k
$183k

Median revenue growth · since first grant

+34%
+10%

Still filing today

67%
49%

New vs renewed · share of each year

In FY2025, 75% of grant dollars renewed an existing relationship; $45k 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
EducationHealthArts & CulturePhilanthropyAnimalsPublic Safety & DisasterOther

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

  • CM
    CARDIGAN MOUNTAIN SCHOOL
    3× · 2023–2025 · $105k · revenue +69%
  • EA
    EMPOWERS AFRICA INC
    4× · 2022–2025 · $24k · revenue +290%
  • HS
    HOLDERNESS SCHOOL
    2× · 2022–2023 · $15k · revenue +4%

Funded once

  • TO
    TOWN OF LYME-FIRE STATION
    one grant, 2020 · $50k
  • VF
    VISIONS FOR CREATIVE HOUSING SOLUTIONSgraduated
    one grant, 2022 · $25k · revenue +49%
  • TO
    TOWN OF HANOVER NH
    one grant, 2017 · $24k

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
Boston Architectural College

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

2
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
3
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
4
United States Naval Institute

Provide an independent forum for those who dare to read, think, speak, and write to advance the professional, literary, and scientific understanding of sea power and other issues critical to global security.

5
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
6
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
7
Augustana College

Rooted in the liberal arts & sciences & lutheran expression of the christian faith, & is committed to offering a challenging education that develops qualities of mind, spirit, & body necessary for a rewarding life of leadership & service…

Education
8
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
9
Trustees of Dartmouth College

Dartmouth College educates the most promising students and prepares them for a lifetime of learning and of responsible leadership, through a faculty dedicated to teaching and the creation of knowledge.

Education
10
Manhattanville University

To educate students to be ethical and socially responsible leaders in a global community.

Education
11
Trustees of Tufts College

Education and Research

Education
12
The Trustees of Princeton University

Research, education and general - princeton university is a private not-for-profit, non-sectarian institution of higher learning with approximately 5,700 undergraduate and 3,300 graduate students. 2,500 students graduated in the 2024-2025…

Education

For reference, the grantee most central to the portfolio’s shape is Breakthrough Miami Inc and the most unlike its peers is St Stephens Anglican Church. 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 backsteadyIndependent K-8 SchoolsCommunity Health CentersAnimal Rescue and AdoptionFaith-Based Liberal Arts Co…Education Equity LeadershipDevelopmental Disabilities …Jewish Community FederationsPublic University Foundatio…Food Pantries & AssistanceSouth Asian Cultural and Sp…Classical Music EnsemblesYouth Ice Hockey ProgramsVeteran Support ServicesCancer Support OrganizationsCommunity FoundationsCommunity Arts OrganizationsLand Conservation Organizat…
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 30 years old; the field is 16. You back the established end — and your money leans older still.

THE FIELDby orgYOUR GRANTEESby number22%0%<5yr14%5%5–10yr19%28%10–20yr16%22%20–35yr13%21%35–55yr16%24%55yr+
THE FIELDby orgYOUR MONEYby value22%0%<5yr14%2%5–10yr19%20%10–20yr16%27%20–35yr13%15%35–55yr16%35%55yr+

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

Closures · last 5 years

The orgs you fund almost never close 0.0% lost their exemption, against 13% of the field you don’t fund.

orgs you fund
0.0%0/60
the rest of the field
13%
240,396/1,819,505

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

58 grantees tracked through their own filings, 2017–2025.

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 20172025, not grant rows in a single year — so this will not match the grant count on the cover. 58 of the 100 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.

0
Load-bearing (≥25% of a budget)
6
Early backer (in before they grew)
57/58
Grantees still filing
40/58
Grew since you first funded

Where your money sits — by cause, then by grantee

CARDIGAN MOUNTAIN SCHOOL — $105,000 · EducationCARDIGAN MOUNTAIN SCHOOLCOLUMBIA INDEPENDENT SCHOOL INC — $87,763 · EducationCOLUMBIA INDEPENDENT SCHOOL INCKAPPA DELTA FOUNDATION INCORPORATED — $16,000 · EducationKAPPA DELTA FOUNDATION INCORPORATEDHOLDERNESS SCHOOL — $15,000 · EducationHOLDERNESS SCHOOLTHE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY — $10,000 · Education+12 more — $33,750 · Education+12 moreStanford University Hoover Institut — $60,000 · OtherStanford University Hoover InstitutTOWN OF LYME-FIRE STATION — $50,000 · OtherTOWN OF LYME-FIRE STATIONTOWN OF HANOVER NH — $23,847 · OtherTOWN OF HANOVER NHTOWN OF LYME NH — $15,179 · OtherTOWN OF LYME NH+60 more — $68,135 · Other+60 moreBaptist Health South Florida Foundation Inc — $20,000 · HealthYoung Leadership Addiction Awareness Inc — $5,000 · HealthAUTISM SPEAKS INC — $3,250 · HealthAMERICAN CANCER SOCIETY INC — $2,000 · HealthBLOOD CANCER UNITED INC — $1,200 · Health+6 more — $3,500 · HealthEMPOWERS AFRICA INC — $23,671 · InternationalAMERICAN FRIENDS OF MAGEN DAVID ADOM — $5,000 · InternationalVISIONS FOR CREATIVE HOUSING SOLUTIONS — $25,000 · Housing & ShelterCENTRAL MISSOURI HUMANE SOCIETY — $10,000 · AnimalsWildlife Heritage Foundation of New Hampshire — $2,500 · AnimalsNEW HAMPSHIRE WILDLIFE FEDERATION — $500 · AnimalsCopa Safety & Education Foundation — $6,000 · Public Safety & DisasterTHE BREAST CANCER RESEARCH FOUNDATION INC — $425 · Public Safety & Disaster
Education$267,513Other$217,161Health$34,950International$28,671Housing & Shelter$25,000Animals$13,000Public Safety & Disaster$6,425

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 budgetCARDIGAN MOUNTAIN SCHOOL — $105,000 over 3y, 0.2% of budgetCOLUMBIA INDEPENDENT SCHOOL INC — $87,763 over 3y, 0.5% of budgetVISIONS FOR CREATIVE HOUSING SOLUTIONS — $25,000 over 1y, 1.0% of budgetEMPOWERS AFRICA INC — $23,671 over 4y, 0.3% of budgetKAPPA DELTA FOUNDATION INCORPORATED — $16,000 over 2y, 0.2% of budgetHOLDERNESS SCHOOL — $15,000 over 2y, 0.0% of budgetTHE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY — $10,000 over 1y, 0.0% of budgetBREAKTHROUGH MIAMI INC — $8,000 over 4y, 0.1% of budgetCopa Safety & Education Foundation — $6,000 over 2y, 0.1% of budgetCARE ELEMENTARY SCHOOL INC — $6,000 over 2y, 0.1% of budgetUNIVERSITY SCHOOL — $5,000 over 3y, 0.0% of budgetAMERICAN FRIENDS OF MAGEN DAVID ADOM — $5,000 over 1y, 0.0% of budgetYoung Leadership Addiction Awareness Inc — $5,000 over 1y, 1.1% of budgetAUTISM SPEAKS INC — $3,250 over 3y, 0.0% of budgetUPPER VALLEY TRAILS ALLIANCE — $3,000 over 4y, 0.2% of budgetThe President and Trustees of Colby College — $3,000 over 2y, 0.0% of budgetBall State University Foundation Inc — $3,000 over 2y, 0.0% of budgetLYME HISTORIANS INC — $2,500 over 1y, 1.8% of budgetWildlife Heritage Foundation of New Hampshire — $2,500 over 1y, 0.3% of budgetGREATER PITTSBURGH COMMUNITY FOOD BANK — $2,000 over 1y, 0.0% of budgetUNIVERSITY OF PITTSBURGH — $2,000 over 1y, 0.0% of budgetAMERICAN CANCER SOCIETY INC — $2,000 over 1y, 0.0% of budgetSECOND AMENDMENT FOUNDATION — $1,690 over 1y, 0.0% of budgetBLOOD CANCER UNITED INC — $1,200 over 2y, 0.0% of budgetMIKEROWEWORKS FOUNDATION — $1,000 over 1y, 0.0% of budgetEmory University — $1,000 over 1y, 0.0% of budgetRANSOM EVERGLADES SCHOOL INC — $1,000 over 1y, 0.0% of budgetPITTSBURGH PARKS CONSERVANCY — $1,000 over 1y, 0.0% of budgetFOUNDATION FOR INDIVIDUAL RIGHTS AND EXPRESSION INC — $1,000 over 1y, 0.0% of budgetFRIENDS OF THE COMMODORE TRAIL INC — $1,000 over 1y, 0.4% of budgetAdvocates for Children of New York — $1,000 over 1y, 0.0% of budgetAmerican Heart Association Inc — $1,000 over 1y, 0.0% of budgetTHE DEERING ESTATE FOUNDATION INC — $1,000 over 1y, 0.1% of budgetJOHNS HOPKINS UNIVERSITY — $1,000 over 1y, 0.0% of budgetDOLPHINS CYCLING CHALLENGE INC — $1,000 over 1y, 0.0% of budgetBOONE COUNTY HISTORICAL SOCIETY — $700 over 1y, 0.1% of budgetUPPER VALLEY HAVEN — $590 over 2y, 0.0% of budgetPOSITIVE TRACKS INC — $500 over 1y, 0.0% of budgetTHEATER REACHING YOUNG PEOPLE & SCHOOLS — $500 over 1y, 0.1% of budgetTURNING POINT USA INC — $500 over 1y, 0.0% of budgetSOUTHEAST VIPASSANA ASSOCIATION INC — $500 over 1y, 0.1% of budgetCORAL GABLES COMMUNITY FOUNDATION INC — $500 over 1y, 0.0% of budgetMary Hitchcock Memorial Hospital — $500 over 2y, 0.0% of budgetTHE MISSOURI SYMPHONY — $500 over 1y, 0.1% of budgetALS THERAPY DEVELOPMENT FOUNDATION INC — $500 over 1y, 0.0% of budgetTHE BREAST CANCER RESEARCH FOUNDATION INC — $425 over 1y, 0.0% of budgetKula for Karma New Jersey Nonprofit Corporation — $250 over 1y, 0.1% of budgetALZHEIMER'S DISEASE & RELATED DISORDERS ASSOCIATION INC — $250 over 1y, 0.0% 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.

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.

New Hampshire Charitable FoundationNH17.8× affinity7 shared granteesties to 7 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: New Hampshire Charitable Foundation · Dunspaugh Dalton Foundation Inc · The Miami Foundation Inc · Mightycause Charitable Foundation · Assurant Foundation · United Way Miami Inc · The Kirk Foundation · Cyril F & Marie O'Neil Foundation · The Couch Family Foundation · The Batchelor Foundation Inc · Veterans United Foundation · Gulf Coast Community Foundation Inc

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 Firehole 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
202122232425
no gov · 50%0%1%3%5%your share of their income ↑0%10%20%30%40%share of the org’s income from governmentmedian 8%
  • Upper Valley Haven38% of income from government
  • Johns Hopkins University12% of income from government
  • Care Elementary School Inc8% of income from government
  • Als Therapy Development Foundation Inc8% of income from government
  • Upper Valley Trails Alliance3% of income from government
no gov moneyreceives it· size = income
5get no government money at all
11report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–40%
typical government reliance, FY2025

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 Firehole Foundation?

Find your warmest path to Firehole 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 100 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