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Plinth

· Private foundation

Blackburn Foundation

Its FY2025 filing reports that it accepted unsolicited grant applications.

$470k
Granted FY2025still arriving
12
Grants FY2025still arriving
4
States reached
$212k
Largest
01What you fund
0192% classified

What you funded, over time

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

Education$1.0MReligion$909kHealth$282kHuman Services$114kEnvironment$50kPhilanthropy$5kArts & Culture$4kEmployment$3kOther$0
02FY2025 · 12 grants

Where the money goes

Your grants by size, and where they go.

By grant size · FY2025

  • Under $10k7 grants · $7k
  • $10k–50k3 grants · $51k
  • $50k–250k2 grants · $412k
$1,000
Median grant
4
States reached
$712k
Total assets
Largest grants
RecipientAmount
ST STEPHEN'S & ST AGNES UPPER SCHOOL$212,000
BASILICA OF SAINT MARY$200,000
HOME SCHOOL NOW$21,250
CAMPAGNA CENTER$20,000
NATURE SACRED$10,000
WORLD TEAM$1,000
MT AIRY BIBLE CHURCH$1,000
THE MENOKIN FOUNDATION$1,000
Individual grant recipient$1,000
CURE ALZHEIMER'S FUND$1,000
JOHN WALKER HOWARD SCHOLARSHIP$1,000
FRIENDS OF ROCKY VERSACE$500
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, $53k) land where the poverty rate runs at 9%, against an area that typically sits at 8%. 92% of those dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-need ZIPs.

area typical 8%UNITED COMMUNITY MINISTRIES: $1k → 6%UNITED COMMUNITY MINISTRIES: $1k → 6%LITTLE SISTERS OF THE POOR: $1k → 14%MT VERNON AT HOME: $1k → 6%MT VERNON AT HOME: $1k → 6%CAMPAGNA CENTER: $20k → 9%CAMPAGNA CENTER: $20k → 9%THE CAMPAGNA CENTER: $5k → 9%CAMPAGNA CENTER: $1k → 9%CAMPAGNA CENTER: $1k → 9%THE CAMPAGNA CENTER: $1k → 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

NY
MA
IN
VA
MD
NC
SC
DC
HI
TX

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.
$2.3M · 17 repeat orgs$101k to everyone else

17 repeat relationships — 7 still active in FY2025, 10 since wound down; 5 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

17
28

Total granted

$2.3M
$96k

Median revenue growth · since first grant

+33%
+59%

Still filing today

35%
36%

New vs renewed · share of each year

In FY2025, 99% of grant dollars renewed an existing relationship; $5k 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
HealthHuman ServicesPhilanthropyEducationArts & CultureInternationalOther

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

  • NS
    NATURE SACRED
    5× · 2021–2025 · $50k · revenue +544%
  • TC
    THE CAMPAGNA CENTER INC
    6× · 2017–2025 · $48k · revenue +33%
  • AS
    Alexandria Seaport Foundation
    2× · 2017–2021 · $2k · revenue +33%

Funded once

  • CF
    CHILD & FAMILY NETWORK
    one grant, 2017 · $20k
  • SS
    ST STEPHEN'S AND ST AGNES SCHOOL FOUNDATIONgraduated
    one grant, 2017 · $12k · revenue +123%
  • IG
    Individual grant recipient
    one grant, 2018 · $10k

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
Sanford Burnham Prebys Medical Discovery Institute

Sanford burnham prebys medical discovery institute's mission is to advance the biomedical sciences by cultivating the next generation of scientific leaders, providing meaningful opportunities for researchers of all backgrounds to learn,…

Health
2
Memorial Sloan-Kettering Cancer Center

Leadership in the prevention, treatment, and cure of cancer through excellence, vision and cost effectiveness in patient care, outreach programs, research, and education.

Health
3
American Academy of Neurology

The Academy's mission is to enhance member career fulfillment and promote brain health for all.

Community Improvement
4
The Johns Hopkins Hospital

For more than 125 years, the mission of the johns hopkins hospital has been to lead the world in the diagnosis and treatment of disease and to train tomorrow's great physicians, nurses and scientists. above all, we aim to provide the…

Health
5
Targeting Resistance in Cancer Cooperative
Health
6
The Susan G Komen Breast Cancer Fdn Group

Susan g. komen 's mission is to save lives by meeting the most critical needs in our communities & investing in breakthrough research to prevent & cure breast cancer.

7
New York Genome Center Inc

Operate a state-of-the-art, world-class genomic research center that creates and uses advanced genomics to understand the genetic basis of disease. for more information, see schedule o.

Health
8
Society for Neuroscience

Sfn's mission is to: 1. advance the understanding of the brain and the nervous system by bringing together scientists of all segments of neuroscience, by facilitating the integration of research directed at all levels of biological…

Health
9
Foundation for the National Institutes of Health Inc

To create and lead alliances and public-private partnerships that advance breakthrough biomedical discoveries and improve the quality of people's lives

Health
10
Lung Cancer Research Foundation

The mission of the lung cancer research foundation is to improve lung cancer outcomes by funding research for the prevention, diagnosis, treatment and cure of lung cancer.

Health
11
Fred Hutchinson Cancer Center

Fred hutch cancer center ("fred hutch") unites innovative research and compassionate care to prevent and eliminate cancer and infectious disease. continued on schedule o

Health
12
Van Andel Research Institute

Medical research organization van andel research institute is an independent biomedical research organization committed to improving the health and enhancing the lives of current and future generations.

Health

For reference, the grantee most central to the portfolio’s shape is Broadcasters Foundation of America and the most unlike its peers is Nature Sacred. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.

04the grantee network

18 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. 18 of the 50 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)
5
Early backer (in before they grew)
18/18
Grantees still filing
13/18
Grew since you first funded

Where your money sits — by cause, then by grantee

BASILICA OF SAINT MARY — $902,000 · OtherBASILICA OF SAINT MARYST STEPHEN'S & ST AGNES UPPER SCHOOL — $822,000 · OtherST STEPHEN'S & ST AGNES UPPER SCHOOLINOVA HEALTH CARE SERVICES — $195,000 · OtherINOVA HEALTH CARE SERVICESHOME SCHOOL NOW — $136,400 · OtherHOME SCHOOL NOW+31 more — $183,700 · Other+31 moreTHE CAMPAGNA CENTER INC — $48,000 · Human ServicesMount Vernon at Home Inc — $2,000 · Human ServicesUNITED COMMUNITY MINISTRIES INC — $2,000 · Human Services+1 more — $1,000 · Human ServicesNATURE SACRED — $50,000 · Philanthropy+1 more — $1,000 · PhilanthropyFOR THE WIN INC — $40,000 · HealthBLADDER CANCER ADVOCACY NETWORK INC — $2,000 · Health+3 more — $3,000 · HealthST STEPHEN'S AND ST AGNES SCHOOL FOUNDATION — $12,000 · EducationAlexandria Seaport Foundation — $2,000 · Arts & CultureMEDECINS SANS FRONTIERES USA INC — $1,000 · InternationalMASSACHUSETTS SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS — $1,000 · Animals
Other$2,239,100Human Services$53,000Philanthropy$51,000Health$45,000Education$12,000Arts & Culture$2,000International$1,000Animals$1,000

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

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ your share of their budgetNATURE SACRED — $50,000 over 5y, 0.6% of budgetTHE CAMPAGNA CENTER INC — $48,000 over 6y, 0.1% of budgetFOR THE WIN INC — $40,000 over 2y, 40% of budgetST STEPHEN'S AND ST AGNES SCHOOL FOUNDATION — $12,000 over 1y, 0.3% of budgetBROADCASTERS FOUNDATION OF AMERICA — $5,000 over 1y, 0.1% of budgetBLADDER CANCER ADVOCACY NETWORK INC — $2,000 over 1y, 0.1% of budgetAlexandria Seaport Foundation — $2,000 over 2y, 0.2% of budgetMount Vernon at Home Inc — $2,000 over 2y, 0.6% of budgetAlexandria Symphony Orchestra — $2,000 over 2y, 0.1% of budgetUNITED COMMUNITY MINISTRIES INC — $2,000 over 1y, 0.0% of budgetCYSTIC FIBROSIS FOUNDATION — $1,000 over 1y, 0.0% of budgetMEDECINS SANS FRONTIERES USA INC — $1,000 over 1y, 0.0% of budgetALZHEIMER'S DISEASE RESEARCH FOUNDATION — $1,000 over 1y, 0.0% of budgetDana-Farber Cancer Institute Inc — $1,000 over 1y, 0.0% of budgetLITTLE SISTERS OF THE POOR OF WASHINGTON DC INC — $1,000 over 1y, 0.0% of budgetMASSACHUSETTS SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS — $1,000 over 1y, 0.0% of budgetST COLETTA OF GREATER WASHINGTON INC — $1,000 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.

  • Who funds NATURE SACRED
  • Who funds THE CAMPAGNA CENTER INC
  • Who funds FOR THE WIN INC
  • Who funds ST STEPHEN'S AND ST AGNES SCHOOL FOUNDATION
  • Who funds BROADCASTERS FOUNDATION OF AMERICA
  • Who funds BLADDER CANCER ADVOCACY NETWORK INC
  • Who funds Alexandria Seaport Foundation
  • Who funds Mount Vernon at Home Inc
  • Who funds Alexandria Symphony Orchestra
  • Who funds UNITED COMMUNITY MINISTRIES INC
  • Who funds CYSTIC FIBROSIS FOUNDATION
  • Who funds MEDECINS SANS FRONTIERES USA INC
  • Who funds THE MENOKIN FOUNDATION
  • Who funds ALZHEIMER'S DISEASE RESEARCH FOUNDATION
  • Who funds Dana-Farber Cancer Institute 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.

Act for AlexandriaVA19.9× affinity7 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Act for Alexandria · The Howard Family Foundation · Ivakota Assoc Inc · Calvert and Sally Simmons Foundation · Clark-Winchcole Foundation · The Community Foundation for Northern Virginia Inc · The Ayco Charitable Foundation · Vanguard Charitable Endowment Program · Morgan Stanley Global Impact Funding Trust Inc · American Online Giving Foundation Inc · National Philanthropic Trust · American Endowment Foundation

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 Blackburn 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%6%13%19%25%share of the org’s income from governmentmedian 7%
  • Dana-Farber Cancer Institute Inc7% of income from government
no gov moneyreceives it· size = income
5get no government money at all
4report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–25%
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.

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 50 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