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William H Prusoff Foundation at a glance

· Private foundation

William H Prusoff Foundation

Its FY2024 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$20k
Granted FY2024still arriving
8
Grants FY2024still arriving
3
States reached
$5k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
0180% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2020 to 2024.

Philanthropy$30kArts & Culture$13kHuman Services$12kEducation$7kHealth$6kAnimals$6kCrime & Legal$1kCommunity Improvement$700Other$0
02FY2024 · 8 grants

Where the money goes

Grants by size, and the largest recipients.

$2,300
Median grant
3
States reached
$382k
Total assets
Largest grants
RecipientAmount
UNIVERSITY OF WISCONSIN$5,000
Individual grant recipient$4,500
Individual grant recipient$3,500
MOZAIC SENIOR LIFE$2,300
Individual grant recipient$2,000
SANDY HOOK PROMISE FOUNDATION$1,000
FOUNDATION FOR THE STARS$1,000
HOPKINS SCHOOL$600
02The need
03

Does the money reach high-need areas?

Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.

show:

Dollar for dollar, its grants (FY20–24) land where the poverty rate runs at 13%, against an area that typically sits at 11%. 48% of its dollars go to grantees based in above-average-need neighborhoods. Its grants spread fairly evenly across need levels.

area typical 11%CHAMBER MUSIC EXCHANGE INC: $3k → 13%FRACTURED ATLAS: $1k → 17%LEUKEMIA & LYMPHOMA: $1k → 13%UNIVERSITY OF WISCONSIN: $5k → 10%MOZAIC SENIOR LIFE: $2k → 9%HOPKINS SCHOOL: $600 → 12%FOUNDATION FOR THE STARS: $1k → 13%TURKISH PHILANTHROPY: $5k → 17%LEUKEMIA & LYMPHOMA: $1k → 13%UNIVERSITY OF WISCONSIN: $1k → 10%JEWISH SENIOR SERVICES: $2k → 9%HOPKINS SCHOOL: $500 → 12%FOUNDATION FOR THE STARS: $1k → 13%TURKISH PHILANTHROPY FUND: $30k → 17%JEWISH SENIOR SERVICES: $2k → 9%FOUNDATION FOR THE STARS: $1k → 13%JEWISH SENIOR SERVICES: $2k → 9%FOUNDATION FOR THE STARS: $1k → 13%JEWISH SENIOR SERVICES: $2k → 9%FOUNDATION FOR THE STARS: $1k → 13%NEAR & FAR: $4k → 9%ST VINCENTS MEDICAL CENTER: $3k → 9%NEAR & FAR: $2k → 9%ST VINCENTS MEDICAL CENTER: $2k → 9%SHATTERPROFF: $3k → 9%SHATTERPROFF: $3k → 9%SANDY HOOK PROMISE FOUNDATION: $1k → 9%CHILDRENS LEARNING CTR: $5k → 9%CONNECTICUT BEARDSLEY ZOO: $2k → 9%CT BEARDSLEY ZOO: $2k → 9%CONNECTICUT BEARDSLEY ZOO: $2k → 9%CONNECTICUT BEARDSLEY ZOO: $2k → 9%FAIRFIELD THEATRE COMPANY: $2k → 9%FAIRFIELD THEATRE COMPANY: $2k → 9%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount
How this is measured
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty line in the grantee’s ZIP, averaged from the tracts in that ZIP.
How this is measured
US grants placed by each grantee’s ZIP, which can differ from where services are delivered. Need from public data (U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA), shown as context about the area, never attributed to the funder’s giving.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

75%of every dollar goes to organizations it has funded before.
$51k · 10 repeat orgs$17k to everyone else

10 repeat relationships: 5 still active in FY2024, 5 since wound down; 3 grantees were first funded in FY2024 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

10
4

Total granted

$51k
$9k

Median revenue growth · since first grant

+24%
+63%

Still filing today

60%
25%

New vs renewed · share of each year

In FY2024, 62% of grant dollars renewed an existing relationship; $8k went to new ones.

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

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

’20’21’22’23’24
Arts & CultureHealthAnimalsEducationCrime & LegalOther
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.

Backed again, and grew

  • JH
    JEWISH HOME FOR THE ELDERLY OF FAIRFIELD COUNTY INC
    5× · 2020–2024 · $12k · revenue +33%
  • CZ
    CONNECTICUT ZOOLOGICAL SOCIETYINC
    3× · 2020–2022 · $6k · revenue +62%
  • FF
    FOUNDATION FOR THE STARS
    5× · 2020–2024 · $5k · revenue +24%

Funded once

  • IG
    Individual grant recipient
    one grant, 2023 · $5k
  • CM
    CHAMBER MUSIC EXCHANGE INC
    one grant, 2022 · $3k
  • FRACTURED ATLAS INCgraduated
    one grant, 2020 · $1k · revenue +63%
How this is measured

Repeat means funded in two or more distinct years. Growth and survival are read from each grantee’s own subsequent IRS filings.

04Its field

Closest unfunded matches

The nonprofits that most resemble its grantees but are not funded by it, scored along the direction from the rest of the field toward the portfolio. A resemblance in what they say they do, not a recommendation.

1
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
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
University of Maryland Facultyphysicians Inc

Under the medical service plan of the university of maryland, school of medicine, administrative support services are provided to the physician practices of the university of maryland, including but not limited to information technology,…

Health
4
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
5
Museum of Arts and Design

To collect, display and interpret objects in craft art and design.

Arts & Culture
6
The American Theatre Guild

The american theatre guild is dedicated to providing the experience of live theatre to foster passion, inspire creativity and empower youth within our communities.

Arts & Culture
7
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
8
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
9
University of Maryland Physicians Pa

Under the medical service plan of the university of maryland school of medicine, medical services are rendered by the members of the faculty on behalf of the school of medicine in connection with their duties to provide clinical…

—
10
Ford's Theatre Society

Ford's theatre explores the legacy of president abraham lincoln and celebrates the american experience through theatre and education.

Arts & Culture
11
University of Maryland Anesthesiology Associates Pa

Under the medical service plan of the university of maryland school of medicine, medical services are rendered by the members of the faculty on behalf of the school of medicine in connection with their duties to provide clinical…

—
12
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
How this is measured
The grantee most central to the portfolio’s shape is Hopkins School Incorporated; the most unlike its peers is Foundation for the Stars. 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

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

Each grant beside the grantee’s revenue from every source, year by year.

How this is measured

Counted here: distinct organizations funded across 2017 to 2025, not grant rows in a single year, so this will not match the grant count on the cover. 9 of the 18 grantees resolved in that span have returns of their own we could reconcile.

Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.

0
Load-bearing (≥25% of a budget)
2
Early backer (in before they grew)
9/9
Grantees still filing
8/9
Grew since first funded

Where the money sits, by cause and then by grantee

SHATTERPROFF: $6,200 · OtherSHATTERPROFFUNIVERSITY OF WISCONSIN: $6,000 · OtherUNIVERSITY OF WISCONSINIndividual grant recipient: $5,000 · OtherIndividual grant recipientIndividual grant recipient: $5,000 · OtherIndividual grant recipientIndividual grant recipient: $4,500 · OtherIndividual grant recipientCHAMBER MUSIC EXCHANGE INC: $2,500 · OtherCHAMBER MUSIC EXCHANGE INCLEUKEMIA & LYMPHOMA: $2,000 · OtherLEUKEMIA & LYMPHOMAIndividual grant recipient: $2,000 · OtherIndividual grant recipient+1 more: $700 · OtherTURKISH PHILANTHROPY FUNDS INC: $30,000 · InternationalTURKISH PHILANTHROPY FUNDS INCJEWISH HOME FOR THE ELDERLY OF FAIRFIELD COUNTY INC: $11,600 · HealthJEWISH HOME FOR TH…St Vincent's Medical Center: $4,300 · HealthSt Vincent's Medic…FOUNDATION FOR THE STARS: $5,000 · Arts & CultureFOUNDATION …FAIRFIELD THEATRE COMPANY INC: $4,000 · Arts & CultureFAIRFIELD T…FRACTURED ATLAS INC: $1,000 · Arts & CultureFRACTURED A…CONNECTICUT ZOOLOGICAL SOCIETYINC: $6,000 · AnimalsHOPKINS SCHOOL INCORPORATED: $1,100 · EducationSANDY HOOK PROMISE FOUNDATION: $1,000 · Crime & Legal
Other$33,900International$30,000Health$15,900Arts & Culture$10,000Animals$6,000Education$1,100Crime & Legal$1,000

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$1.0M$10Mgrantee revenue →↑ funder's share of their budgetTURKISH PHILANTHROPY FUNDS INC: $30,000 over 1y, 1.0% of budgetJEWISH HOME FOR THE ELDERLY OF FAIRFIELD COUNTY INC: $11,600 over 5y, 0.0% of budgetCONNECTICUT ZOOLOGICAL SOCIETYINC: $6,000 over 3y, 0.1% of budgetFOUNDATION FOR THE STARS: $5,000 over 5y, 1.4% of budgetFAIRFIELD THEATRE COMPANY INC: $4,000 over 2y, 0.1% of budgetHOPKINS SCHOOL INCORPORATED: $1,100 over 2y, 0.0% of budgetSANDY HOOK PROMISE FOUNDATION: $1,000 over 1y, 0.0% of budgetFRACTURED ATLAS INC: $1,000 over 1y, 0.0% of budget
Grantee by grantee: a decade per organization, before and after funding

A decade per grantee: revenue shaded, grants as bars, all rows on one timeline.

  • Who funds TURKISH PHILANTHROPY FUNDS INC ↗
  • Who funds JEWISH HOME FOR THE ELDERLY OF FAIRFIELD COUNTY INC ↗
  • Who funds CONNECTICUT ZOOLOGICAL SOCIETYINC ↗
  • Who funds FOUNDATION FOR THE STARS ↗
  • Who funds St Vincent's Medical Center ↗
  • Who funds FAIRFIELD THEATRE COMPANY INC ↗
  • Who funds HOPKINS SCHOOL INCORPORATED ↗
  • Who funds SANDY HOOK PROMISE FOUNDATION ↗
  • Who funds FRACTURED ATLAS INC ↗

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 Co…Ge Aerospace Foundati…American Endowment Fo…Vanguard Charitable E…American Online Givin…Donor Advised Charita…Fidelity Investments …Amazonsmile Foundation
Fairfield County's Community Foundation IncCT13.4× affinity4 shared granteesties to 7 of 7Hover any node to trace its alignments.Compare side by side →

Open a dossier: Fairfield County's Community Foundation Inc · Ge Aerospace Foundation · American Endowment Foundation · Vanguard Charitable Endowment Program · American Online Giving Foundation Inc · Donor Advised Charitable Giving Inc · Fidelity Investments Charitable Gift Fund · Amazonsmile Foundation

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.

How much its grantees rely on government

Each dot is one organization William H Prusoff Foundation funds: left to right is the share of its income from government, bottom to top the share from William H Prusoff Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 10%0%1%3%5%funder's share of their income ↑0%4%8%11%15%share of the org’s income from government →median 0%
  • Jewish Home for the Elderly of Fairfield County Inc: 0% of income from government
  • Sandy Hook Promise Foundation: 0% of income from government
  • Fairfield Theatre Company Inc: 0% of income from government
no gov moneyreceives it· size = income
1get no government money at all
1report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–15%
typical government reliance, FY20–25
How this is measured
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 a grant caused the public funding. Coverage is precision-first, a floor rather than 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 to 24 months.

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 18 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 2024, released 2024. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on William H Prusoff’s filings →

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 endowment market
who holds foundation money, and what just moved
The camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home