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Riverhead Building Supply Charitable Foundation Inc at a glance

· Private foundation

Riverhead Building Supply Charitable Foundation Inc

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.

$335k
Granted FY2025still arriving
10
Grants FY2025still arriving
5
States reached
$150k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
01100% classified

What it funded, over time

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

Health$743kHousing & Shelter$539kHuman Services$337kRecreation & Sports$305kArts & Culture$120kPublic Safety & Disaster$90kYouth Development$84kCivil Rights$58kOther$0
02FY2025 · 10 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k3 grants · $10k
  • $10k–50k5 grants · $85k
  • $50k–250k2 grants · $240k
$10,350
Median grant
5
States reached
$1.2M
Total assets
Largest grants
RecipientAmount
HABITAT FOR HUMANITY OF EASTERN CT INC$150,000
RIVERHEAD VOLUNTEER AMBULANCE CORPS INC$90,000
CYSTIC FIBROSIS FOUNDATION$30,000
WARRIOR RANCH FOUNDATION$25,000
GLORIA GEMMA BREAST CANCER$10,350
INSPIRATIONAL TRIATHLON RACING$10,000
Individual grant recipient$10,000
EAST END ARTS & HUMANITIES COUNCIL$5,000
TIMOTHY HILL CHILDREN'S RANCH INC$2,500
IN JORDAN'S HONOR LTD$2,500
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:

Its human-services grants (FY17–25, $308k) land where the poverty rate runs at 7%, against an area that typically sits at 5%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 5%THE ANDY FOUNDATION: $3k → 6%RETREAT INC: $10k → 7%NEIGHBORHOOD HOUSE OF LONG ISLAND INC: $5k → 7%NEIGHBORHOOD HOUSE OF LONG ISLAND INC: $5k → 7%TIMOTHY HILL CHILDREN'S RANCH INC: $128k → 7%TIMOTHY HILL CHILDREN'S RANCH INC: $125k → 7%TIMOTHY HILL CHILDREN RANCH: $23k → 7%TIMOTHY HILL CHILDREN'S RANCH INC: $3k → 7%TIMOTHY HILL CHILDREN'S RANCH: $3k → 7%TIMOTHY HILL CHILDREN'S RANCH INC: $3k → 7%TIMOTHY HILL CHILDREN'S RANCH INC: $3k → 7%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.
04

Where the work is directed

The same grants placed two ways: where each recipient sits, and where its stated purpose sends the money.

About 26% of Riverhead Building Supply Charitable Foundation Inc’s grant dollars are earmarked for a different county than the recipient’s own address. By recipient address, 80% of the giving stays in NY; by stated purpose, 67%.

Riverhead Building Supply Charitable Foundation Inclessmore of its giving
Placed by recipient address
How this is measured
Recipient view: each grant at its grantee’s ZIP, mapped to a county. Directed view: each grant at the county its stated purpose names, falling back to the recipient’s county when the purpose names no place; US grants only. A county shows only if it carries the top 95% of that view’s dollars. Purposes are read from the funder’s own 990 grant descriptions.
03Its grantees
repeat funding

Who it funds again

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

58%of every dollar goes to organizations it has funded before.
$1.4M · 14 repeat orgs$986k to everyone else

Grantees it renews have grown median revenue +41% since the first grant, against 0% for those funded once.

14 repeat relationships: 8 still active in FY2025, 6 since wound down; 2 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

14
18

Total granted

$1.4M
$871k

Median revenue growth · since first grant

+41%
0%

Still filing today

79%
67%

New vs renewed · share of each year

In FY2025, 66% of grant dollars renewed an existing relationship; $115k 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
Human ServicesHealthHousing & ShelterRecreation & SportsPhilanthropyYouth DevelopmentOther
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

  • TH
    TIMOTHY HILL CHILDREN'S RANCH INC
    7× · 2017–2025 · $285k · revenue +112%
  • HF
    HABITAT FOR HUMANITY OF LONG ISLAND INC
    3× · 2020–2022 · $180k · revenue +41%
  • CF
    CYSTIC FIBROSIS FOUNDATION
    4× · 2022–2025 · $90k · revenue +43%

Funded once

  • PH
    PBMC HEALTH FOUNDATION
    one grant, 2017 · $500k
  • HF
    HABITAT FOR HUMANITY
    one grant, 2017 · $104k
  • SC
    SUFFOLK COUNTY COUNCIL BOY SCOUTS OF AMERICAgraduated
    one grant, 2020 · $56k · revenue +64%
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
Long Island Community Hospital At Nyu Langone Health

The goals and objectives of the corporation are as follows:(a) to operate and maintain a nonsectarian, general hospital at one or more locations for the furnishing of inpatient, ambulatory, restorative, preventative and emergency medical…

—
2
Long Island Partnership Clt Housing Development Fund Company Inc

Long island partnership clt housing development fund company, inc. (lipclt) was established to provide housing within nassau and suffolk counties in new york for "persons of low income", as defined in any federal or state low income…

Housing & Shelter
3
Long Island Medical Foundation Inc Dba Nuhealth Foundation

Long island medical foundation (limf) is the not-for-profit philanthropic arm of the nassau health care corporation. limf is devoted to inspire philanthropic support for the nassau university medical center, a. holly patterson skilled…

Health
4
Long Island Partnership Housing Development Fund Corporation Inc

Long island partnership housing development fund company, inc. was formed for the purpose of acquiring and holding title to land from government and private sources, securing financing through various government and private grants for…

Housing & Shelter
5
The North Shore Land Alliance Inc

To conserve and steward long island's natural and historic lands, waters and environmental resources. through education, outreach and volunteerism, we connect people to nature and inspire a community conservation ethic.

Environment
6
Staten Island University Hospital Foundation

The mission of staten island university hospital's foundation is to achieve philanthropic relationships for support and endowment, providing highest quality care, services and state of the art equipment. philanthropy has played an…

Health
7
East End Tourism Alliance Inc

Our organizations mission is to promote tourism for the east end of long island specifically the five east end townships (riverhead, southold, south hampton, east hampton, and shelter island). the goal is to increase public awareness of…

Community Improvement
8
Long Island Jewish Medical Center

Long island jewish medical center is part of the northwell health ("northwell"), which strives to improve the health of the communities it serves and is committed to providing the highest quality clinical care; educating the current and…

Health
9
Eastern Long Island Hospital Foundation

Develop and manage all resources and assets of the corporation in support of eastern long island hospital and its successor stony brook eastern long island hospital's (a division of stony brook university hospital) healthcare mission and…

Health
10
The Floating Hospital Inc

The hospital is a free standing diagnostic and treatment center licensed under article 28 and article 31 of the nys health law located in long island city, ny. the hospital provides a broad range of primary health care services to a…

Health
11
Peconic Public Broadcasting

Peconic Public Broadcasting is a public FM radio station located in Southampton, New York. The station services Long Island and coastal Connecticut and offers listeners both national and local programs.

—
12
East Hampton Library

The purpose of the East Hampton Library is to meet the information, knowledge and reading needs of its users. In addition, the Library supports its famed Long Island Collection for historical reasearch which includes more than 100,000…

—
How this is measured
The grantee most central to the portfolio’s shape is The Southampton Hospital Foundation Inc; the most unlike its peers is Cystic Fibrosis Foundation. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
05the grantee network

26 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. 26 of the 34 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)
5
Early backer (in before they grew)
25/26
Grantees still filing
14/26
Grew since first funded

Where the money sits, by cause and then by grantee

PBMC HEALTH FOUNDATION: $500,000 · OtherPBMC HEALTH FOUNDATIONHABITAT FOR HUMANITY: $103,500 · OtherHABITAT FOR HUMANITYIndividual grant recipient: $58,000 · OtherIndividual grant recipientST CHARLES HOSPITAL FOUNDATION: $55,000 · OtherST CHARLES HOSPITAL FOUNDATIONGLORIA GEMMA BREAST CANCER: $45,850 · OtherEast End Arts & Humanities Council: $40,000 · OtherEast End Food Institute: $50,000 · Other+10 more: $93,500 · Other+10 moreHabitat for Humanity of Eastern Connecticut Inc: $250,000 · Housing & ShelterHabitat for Humanity…HABITAT FOR HUMANITY OF LONG ISLAND INC: $180,000 · Housing & ShelterHABITAT FOR HUMANITY…+1 more: $5,000 · Housing & ShelterTIMOTHY HILL CHILDREN'S RANCH INC: $285,000 · Human ServicesTIMOTHY HILL C…+3 more: $22,500 · Human Services+3 morePECONIC HOCKEY FOUNDATION INC: $280,000 · PhilanthropyPECONIC HOCKEY…PADDLERS FOR HUMANITY INC: $20,000 · PhilanthropyPADDLERS FOR H…CYSTIC FIBROSIS FOUNDATION: $90,000 · HealthCYSTIC FI…RIVERHEAD VOLUNTEER AMBULANCE CORPS INC: $90,000 · HealthRIVERHEAD…WARRIOR RANCH FOUNDATION INC: $25,000 · HealthWARRIOR R…+1 more: $2,000 · HealthSUFFOLK COUNTY COUNCIL BOY SCOUTS OF AMERICA: $55,872 · Youth DevelopmentINSPIRATIONAL TRIATHLON RACING INTERNATIONAL CORP: $28,000 · Youth DevelopmentLT MICHAEL P MURPHY NAVY SEAL MUSEUM: $50,000 · Arts & CultureMONTAUK HISTORICAL SOCIETY: $25,000 · Arts & Culture
Other$945,850Housing & Shelter$435,000Human Services$307,500Philanthropy$300,000Health$207,000Youth Development$83,872Arts & Culture$75,000

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

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetTIMOTHY HILL CHILDREN'S RANCH INC: $285,000 over 7y, 1.6% of budgetPECONIC HOCKEY FOUNDATION INC: $280,000 over 2y, 15% of budgetHabitat for Humanity of Eastern Connecticut Inc: $250,000 over 2y, 6.1% of budgetHABITAT FOR HUMANITY OF LONG ISLAND INC: $180,000 over 3y, 1.2% of budgetCYSTIC FIBROSIS FOUNDATION: $90,000 over 4y, 0.0% of budgetSUFFOLK COUNTY COUNCIL BOY SCOUTS OF AMERICA: $55,872 over 1y, 3.2% of budgetST CHARLES HOSPITAL FOUNDATION: $55,000 over 2y, 8.3% of budgetEast End Food Institute: $50,000 over 1y, 5.2% of budgetLT MICHAEL P MURPHY NAVY SEAL MUSEUM: $50,000 over 1y, 12% of budgetEast End Arts & Humanities Council: $40,000 over 7y, 1.5% of budgetINSPIRATIONAL TRIATHLON RACING INTERNATIONAL CORP: $28,000 over 4y, 1.1% of budgetFAMILY COMMUNITY LIFE CENTER INC: $27,000 over 3y, 14% of budgetWARRIOR RANCH FOUNDATION INC: $25,000 over 1y, 3.4% of budgetMONTAUK HISTORICAL SOCIETY: $25,000 over 1y, 0.8% of budgetPADDLERS FOR HUMANITY INC: $20,000 over 1y, 8.5% of budgetThe Neighborhood House of Long Island: $10,000 over 2y, 5.1% of budgetRetreat Inc: $10,000 over 1y, 0.2% of budgetHAMPTONS YOUTH CAMPS INC: $5,000 over 1y, 5.2% of budgetMATTITUCK-LAUREL LIBRARY: $5,000 over 1y, 0.3% of budgetLONG ISLAND COUNCIL OF CHURCHES INC: $3,000 over 1y, 0.3% of budgetAndy Foundation: $2,500 over 1y, 1.1% of budgetSTONY BROOK FOUNDATION INC: $2,000 over 1y, 0.0% of budgetTHE SOUTHAMPTON HOSPITAL FOUNDATION INC: $2,000 over 2y, 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.

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.

Peoples United Commun…The New York Communit…The Bank of America C…Network for GoodNational Philanthropi…Vanguard Charitable E…Fidelity Investments …American Online Givin…Donor Advised Charita…Amazonsmile Foundation
Peoples United Community FoundationCT15.3× affinity5 shared granteesties to 9 of 9Hover any node to trace its alignments.Compare side by side →

Open a dossier: Peoples United Community Foundation · The New York Community Trust · The Bank of America Charitable Foundation Inc · Network for Good · National Philanthropic Trust · Vanguard Charitable Endowment Program · Fidelity Investments Charitable Gift Fund · American Online Giving Foundation Inc · Donor Advised Charitable Giving Inc · 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 Riverhead Building Supply Charitable Foundation Inc funds: left to right is the share of its income from government, bottom to top the share from Riverhead Building Supply Charitable Foundation Inc. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 10%1%5%11%20%funder's share of their income ↑0%13%25%38%50%share of the org’s income from government →
    no gov moneyreceives it· size = income
    1get no government money at all
    10report government grants on their 990 we could not trace to a source (not plotted)
    0rely on government for over half their income
    ⤢ axis zoomed · 0–50%
    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.
    05Through Plinth

    Warm introductions · Powered by PlinthPlus

    How do I get to Riverhead Building Supply Charitable Foundation Inc?

    Find your warmest path to Riverhead Building Supply Charitable Foundation Inc 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 from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 34 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

    Play a game based on Riverhead Building Supply’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