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· Private foundation

The Gilbert Mackay Foundation

Its FY2025 filing reports that it accepted unsolicited grant applications.

$65k
Granted FY2025still arriving
17
Grants FY2025still arriving
4
States reached
$8k
Largest
01What it funds
0194% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2024.

Arts & Culture$127kEnvironment$46kEducation$34kHuman Services$25kReligion$20kRecreation & Sports$18kHealth$11kYouth Development$8kOther$0
02FY2025 · 17 grants

Where the money goes

Grants by size, and the largest recipients.

$3,000
Median grant
4
States reached
$526k
Total assets
Largest grants
RecipientAmount
THE HOTCHKISS FUND$8,000
CHESTNUT HILL CONSERVANCY$7,000
GRACE CHURCH IN NEW YORK$5,000
BRONX MUSEUM OF THE ARTS$5,000
WOODMERE ART MUSEUM INC$5,000
THE MADOO CONSERVANCY$5,000
WOMEN'S HOUSING AND ECONOMIC DEVELOPMENT CORP (WHEDCO)$4,000
BRIDGEHAMPTON MUSEUM$3,000
WESTON THEATER COMPANY$3,000
FRIENDS OF THE WISSAHICKON INC$3,000
VERMONT ADAPTIVE SKI AND SPORTS$3,000
AIM BY KYLE ABRAHAM (FKA ABRAHAMINMOTION)$2,500
BRIDGEHAMPTON VOLUNTEER FIRE DEPARTMENT$2,500
HAMPTON LIBRARY IN BRIDGEHAMPTON INC$2,500
FRIENDS OF THE HIGH LINE$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:

Dollar for dollar, its grants (FY17–25) land where the poverty rate runs at 17%, against an area that typically sits at 13%. 68% of its dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 13%SPRINGSIDE CHESTNUT HILL ACADEMY THE SCH FUND: $13k → 22%BRIDGEHAMPTON MUSEUM: $3k → 7%WHITNEY MUSEUM OF AMERICAN ART: $10k → 17%THE BRONX MUSEUM OF THE ARTS: $7k → 28%THE HOTCHKISS FUND: $13k → 9%WESTON PLAYHOUSE THEATRE: $3k → 9%BART ADAPTIVE SPORTS CENTER: $4k → 11%CHESTNUT HILL CONSERVANCY: $7k → 22%FRIENDS OF THE HIGH LINE: $5k → 17%THE BRONX MUSEUM OF THE ARTS: $7k → 28%THE HOTCHKISS FUND: $8k → 9%BART ADAPTIVE SPORTS CENTER: $4k → 11%SPRINGSIDE CHESTNUT HILL ACADEMY THE SCH FUND: $6k → 22%FRIENDS OF THE HIGH LINE: $5k → 17%BRONX MUSEUM OF THE ARTS: $5k → 28%THE HOTCHKISS FUND: $6k → 9%SPRINGSIDE CHESTNUT HILL ACADEMY THE SCH FUND: $6k → 22%FRIENDS OF THE HIGH LINE: $5k → 17%BRONX MUSEUM OF THE ARTS: $5k → 28%THE HOTCHKISS FUND: $6k → 9%CHESTNUT HILL CONSERVANCY: $5k → 22%The Bronx Museum of the Arts: $5k → 28%CHESTNUT HILL CONSERVANCY: $5k → 22%The Bronx Museum of the Arts: $5k → 28%WOODMERE ART MUSEUM INC: $5k → 22%LIBRARY OF AMERICA: $5k → 17%BRONX MUSEUM OF THE ARTS: $5k → 28%WOODMERE ART CENTER: $5k → 22%LIBRARY OF AMERICA: $5k → 17%WHEDCO: $4k → 28%CHESTNUT HILL CONSERVANCY: $5k → 22%WHEDCO: $4k → 28%WOODMERE ART CENTER: $5k → 22%WOMEN'S HOUSING AND ECONOMIC DEVELOPMENT CORP (WHEDCO): $4k → 28%CHESTNUT HILL CONSERVANCY: $5k → 22%WOMEN'S HOUSING AND ECONOMIC DEVELOPMENT CORP (WHEDCO): $4k → 28%WOODMERE ART MUSEUM INC: $5k → 22%WOMEN'S HOUSING AND ECONOMIC DEVELOPMENT CORP: $4k → 28%WOODMERE ART MUSEUM INC: $5k → 22%THE MADOO CONSERVANCY: $15k → 7%THE MADOO CONSERVANCY: $5k → 7%WELLNESS IN THE SCHOOLS: $5k → 17%GRACE CHURCH IN NEW YORK: $5k → 17%GRACE CHURCH IN NEW YORK: $5k → 17%GRACE CHURCH IN NEW YORK: $5k → 17%GRACE CHURCH IN NEW YORK: $5k → 17%New York City Ballet: $5k → 17%GRACE CHURCH IN NEW YORK: $5k → 17%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.

90%of every dollar goes to organizations it has funded before.
$341k · 23 repeat orgs$38k to everyone else

23 repeat relationships: 14 still active in FY2025, 9 since wound down; 3 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

23
7

Total granted

$341k
$29k

Median revenue growth · since first grant

+10%
+32%

Still filing today

52%
86%

New vs renewed · share of each year

In FY2025, 87% of grant dollars renewed an existing relationship; $9k went to new ones.

50%100%’17’18’20’21’22’23’24’25
RenewedFirst-time

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

’17’18’20’21’22’23’24’25
Arts & CultureEducationEnvironmentRecreation & SportsHealthHousing & ShelterOther
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

  • CH
    Chestnut Hill Conservancy
    7× · 2017–2025 · $32k · revenue +10%
  • TL
    THE LITERARY CLASSICS OF THE US INC D/B/A LIBRARY OF AMERICA
    7× · 2017–2025 · $20k · revenue +3%
  • WA
    WOODMERE ART MUSEUM
    3× · 2023–2025 · $15k · revenue +88%

Funded once

  • WM
    WHITNEY MUSEUM OF AMERICAN ARTgraduated
    one grant, 2022 · $10k · revenue +74%
  • WI
    WELLNESS IN THE SCHOOLS INCgraduated
    one grant, 2022 · $5k · revenue +131%
  • NY
    NEW YORK CITY BALLET INC
    one grant, 2017 · $5k · revenue +21%
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
The Brooklyn Institute of Arts and Sciences

The mission of the brooklyn institute of arts and sciences, d/b/a brooklyn museum (the "museum") is to bring people together through art and experiences that inspire celebration, compassion, courage, and the will to act. (see schedule o).

Arts & Culture
2
The Pierpont Morgan Library

The Morgan Library & Museum celebrates and shares the history and process of human creativity from antiquity to the present day through the preservation, study, and interpretation of a dynamic and growing collection.

Education
3
The Long Island Museum of American Art History & Carriages

The long island museum is dedicated to inspiring people of all ages with an understanding and enjoyment of american art, history and carriages as expressed through the heritage of long island and its diverse communities.

Arts & Culture
4
The Jewish Museum

The mission of the jewish museum is to collect, preserve, exhibit and interpret art and jewish culture. see schedule o for more information.

Arts & Culture
5
New York Botanical Garden

The new york botanical garden is a museum of plants and a scientific research center devoted to the study of plants and their uses. it is the garden's mission to improve public understanding of the natural world, horticulture, and the…

Environment
6
Staten Island Institute of Arts and Sciences dba the Staten Island Museum

Founded in 1881 the Staten Island Museum engages visitors with interdisciplinary exhibitions, public programs, and educational activities for all ages. It is the mission of the Staten Island Museum to spark curiosity and generate…

Arts & Culture
7
The Neue Galerie New York
Arts & Culture
8
Museum of Modern Art

The Museum of Modern Art is a private, non-profit institution chartered by the State of New York Department of Education in 1929 to foster public awareness of modern and contemporary art. (Continued in Schedule O)

Arts & Culture
9
Museum of the City of New York

The museum of the city of new york fosters understanding of the distinctive nature of urban life in the world's most influential metropolis. it engages visitors by celebrating, documenting, and interpreting the city's past, present, and…

Arts & Culture
10
New Museum of Contemporary Art

A center for exhibitions, information, and documentation about living artists since 1977, which continues to be a place of experimentation and a hub of new art and new ideas.

Arts & Culture
11
American Museum of Natural History

The museum's mission statement is: "to discover, interpret, and disseminate - through scientific research and education - knowledge about human cultures, the natural world, and the universe."

Arts & Culture
12
Nassau County Museum of Art

The museum's mission is to encourage and promote the appreciation of fine art to people in its surrounding communities and beyond. the museum is dedicated to fostering a deeper understanding of the arts, with particular emphasis on the…

Arts & Culture
How this is measured
The grantee most central to the portfolio’s shape is Women's Housing & Economic Development Corporation; the most unlike its peers is Bart J Ruggiere Adaptive Sports Center Inc. 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

19 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. 19 of the 33 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)
3
Early backer (in before they grew)
19/19
Grantees still filing
15/19
Grew since first funded

Where the money sits, by cause and then by grantee

THE HOTCHKISS FUND: $32,500 · OtherTHE HOTCHKISS FUNDSPRINGSIDE CHESTNUT HILL ACADEMY THE SCH FUND: $26,500 · OtherSPRINGSIDE CHESTNUT HILL ACADEMY THE SCH FUNDGRACE CHURCH IN NEW YORK: $25,000 · OtherGRACE CHURCH IN NEW YORKWOODMERE ART CENTER: $15,000 · OtherWOODMERE ART CENTERBART ADAPTIVE SPORTS CENTER: $12,000 · OtherBART ADAPTIVE SPORTS CENTERBRIDGEHAMPTON MUSEUM: $9,500 · OtherBRIDGEHAMPTON MUSEUMWHEDCO: $8,000 · OtherIndividual grant recipient: $6,000 · OtherIRMC FOUNDATION: $6,000 · Other+5 more: $16,500 · Other+5 moreThe Bronx Museum of the Arts: $39,000 · Arts & CultureThe Bronx Museum of the ArtsChestnut Hill Conservancy: $32,000 · Arts & CultureChestnut Hill ConservancyTHE LITERARY CLASSICS OF THE US INC D/B/A LIBRARY OF AMERICA: $20,000 · Arts & CultureTHE LITERARY CLASSICS OF THE US INC D/B/A LI…FRIENDS OF THE HIGH LINE INC: $17,500 · Arts & CultureFRIENDS OF THE HIGH LINE INCWOODMERE ART MUSEUM: $15,000 · Arts & CultureWOODMERE ART MUSEUMWHITNEY MUSEUM OF AMERICAN ART: $10,000 · Arts & CultureWHITNEY MUSEUM OF AMERICAN ARTTHE WESTON PLAYHOUSE THEATER: $6,000 · Arts & CultureNEW YORK CITY BALLET INC: $5,000 · Arts & Culture+2 more: $4,500 · Arts & CultureMADOO CONSERVANCY INC: $20,000 · EnvironmentTHE FRIENDS OF THE WISSAHICKON INC: $9,000 · EnvironmentWOMEN'S HOUSING & ECONOMIC DEVELOPMENT CORPORATION: $12,000 · Housing & ShelterHAMPTON LIBRARY IN BRIDGEHAMPTON INC: $6,500 · EducationNEW YORK SCHOOL OF THE ARTS INC: $2,500 · EducationBart J Ruggiere Adaptive Sports Center Inc: $6,000 · Recreation & SportsVERMONT ADAPTIVE SKI AND SPORTS: $3,000 · Recreation & SportsBRIDGEHAMPTON VOLUNTEER FIRE DEPARTMENT: $8,500 · Public Safety & DisasterWELLNESS IN THE SCHOOLS INC: $5,000 · Health
Other$157,000Arts & Culture$149,000Environment$29,000Housing & Shelter$12,000Education$9,000Recreation & Sports$9,000Public Safety & Disaster$8,500Health$5,000

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

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetThe Bronx Museum of the Arts: $39,000 over 7y, 0.3% of budgetChestnut Hill Conservancy: $32,000 over 7y, 1.2% of budgetMADOO CONSERVANCY INC: $20,000 over 2y, 1.7% of budgetTHE LITERARY CLASSICS OF THE US INC D/B/A LIBRARY OF AMERICA: $20,000 over 7y, 0.1% of budgetFRIENDS OF THE HIGH LINE INC: $17,500 over 4y, 0.0% of budgetWOODMERE ART MUSEUM: $15,000 over 3y, 0.1% of budgetWOMEN'S HOUSING & ECONOMIC DEVELOPMENT CORPORATION: $12,000 over 3y, 0.0% of budgetWHITNEY MUSEUM OF AMERICAN ART: $10,000 over 1y, 0.0% of budgetTHE FRIENDS OF THE WISSAHICKON INC: $9,000 over 3y, 0.1% of budgetBRIDGEHAMPTON VOLUNTEER FIRE DEPARTMENT: $8,500 over 4y, 0.9% of budgetHAMPTON LIBRARY IN BRIDGEHAMPTON INC: $6,500 over 3y, 0.1% of budgetBart J Ruggiere Adaptive Sports Center Inc: $6,000 over 2y, 1.9% of budgetTHE WESTON PLAYHOUSE THEATER: $6,000 over 2y, 0.1% of budgetWELLNESS IN THE SCHOOLS INC: $5,000 over 1y, 0.2% of budgetNEW YORK CITY BALLET INC: $5,000 over 1y, 0.0% of budgetTHE DRAWING CENTER INC: $2,500 over 1y, 0.1% of budgetNEW YORK SCHOOL OF THE ARTS INC: $2,500 over 1y, 0.1% of budgetHISPANIC SOCIETY OF AMERICA: $2,000 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 The Bronx Museum of the Arts ↗
  • Who funds Chestnut Hill Conservancy ↗
  • Who funds MADOO CONSERVANCY INC ↗
  • Who funds THE LITERARY CLASSICS OF THE US INC D/B/A LIBRARY OF AMERICA ↗
  • Who funds FRIENDS OF THE HIGH LINE INC ↗
  • Who funds WOODMERE ART MUSEUM ↗
  • Who funds WOMEN'S HOUSING & ECONOMIC DEVELOPMENT CORPORATION ↗
  • Who funds WHITNEY MUSEUM OF AMERICAN ART ↗
  • Who funds THE FRIENDS OF THE WISSAHICKON INC ↗
  • Who funds BRIDGEHAMPTON VOLUNTEER FIRE DEPARTMENT ↗
  • Who funds HAMPTON LIBRARY IN BRIDGEHAMPTON INC ↗
  • Who funds Bart J Ruggiere Adaptive Sports Center Inc ↗
  • Who funds THE WESTON PLAYHOUSE THEATER ↗
  • Who funds WELLNESS IN THE SCHOOLS INC ↗
  • Who funds NEW YORK CITY BALLET INC ↗
  • Who funds VERMONT ADAPTIVE SKI AND SPORTS ↗
  • Who funds THE DRAWING CENTER INC ↗
  • Who funds NEW YORK SCHOOL OF THE ARTS INC ↗
  • Who funds HISPANIC SOCIETY OF AMERICA ↗

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.

The New York Community TrustNY12.9× affinity4 shared granteesties to 8 of 8Hover any node to trace its alignments.Compare side by side →

Open a dossier: The New York Community Trust · National Philanthropic Trust · Vanguard Charitable Endowment Program · The Pfizer Foundation Inc · Morgan Stanley Global Impact Funding Trust Inc · Fidelity Investments Charitable Gift Fund · Donor Advised Charitable Giving Inc · American Online Giving Foundation 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 The Gilbert Mackay Foundation funds: left to right is the share of its income from government, bottom to top the share from The Gilbert Mackay 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%
  • The Weston Playhouse Theater: 0% of income from government
no gov moneyreceives it· size = income
1get no government money at all
6report 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.
05Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to The Gilbert Mackay Foundation?

Find your warmest path to The Gilbert Mackay 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 from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 33 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

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