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Gigi & Averell H Mortimer Foundation at a glance

· Private foundation

Gigi & Averell H Mortimer Foundation

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.

$60k
Granted FY2025still arriving
10
Grants FY2025still arriving
4
States reached
$15k
Largest
01What it fundsRead
02The needRead
03Its fieldRead
04Through 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$314kArts & Culture$20kCommunity Improvement$15kAnimals$10kScience & Tech$10kEducation$9kEnvironment$6kYouth Development$5k
02FY2025 · 10 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k6 grants · $15k
  • $10k–50k4 grants · $45k
$5,000
Median grant
4
States reached
$2.0M
Total assets
Largest grants
RecipientAmount
Brandywire Conservancy & Museum of Art$15,000
COX SCIENCE CENTRE & AQUARIUM$10,000
PALM BEACH ZOO & CONSERVATION SOCIETY$10,000
TORY BURCH FOUNDATION$10,000
THE CENTRE FOR DISCOVERY$5,000
PECONIC LAND TRUST$2,500
THE EVERGLADES FOUNDATION$2,500
Orange County Historical Society$2,500
ST JUDE'S CHILDREN HOSPITAL$1,500
VANDERBILT UNIVERSITY$1,000
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, $15k) land where the poverty rate runs at 17%, against an area that typically sits at 10%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 10%TORY BURCH FOUNDATION: $10k → 17%Tory Burch Foundation: $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 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
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
2
Marine Biological Laboratory

The Marine Biological Laboratory (MBL) is a world-renowned center for biological discovery and training that is notably affiliated with more than 60 Nobel Prize winners. Research is conducted by full-time faculty as well as hundreds of the…

Science & Tech
3
Cornell University

Education, research, medical services and other public services.

Education
4
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
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
Boston Architectural College

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

—
7
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
8
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
9
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
10
Stony Brook Urology University Faculty Practice Corporation

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
11
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
12
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
How this is measured
The grantee most central to the portfolio’s shape is Open Space Institute Inc; the most unlike its peers is New York University. 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

16 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. 16 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)
4
Early backer (in before they grew)
16/16
Grantees still filing
8/16
Grew since first funded

Where the money sits, by cause and then by grantee

THE CENTER FOR DISCOVERY INC: $305,000 · HealthTHE CENTER FOR DISCOVERY INC+3 more: $3,750 · HealthBrandywine Conservancy & Museum of Art: $15,000 · Arts & CultureCox Science Center and Aquarium Inc: $10,000 · Arts & CultureCOMMON SENSE MEDIA: $2,500 · Arts & CulturePALM BEACH ZOO & CONSERVATION SOCIETY: $10,000 · OtherNYU Langone Medical Center: $5,000 · OtherOrange County Historical Society: $2,500 · OtherTORY BURCH FOUNDATION INC: $15,000 · Human ServicesNew York University: $5,000 · EducationTHE ROCKEFELLER UNIVERSITY: $3,000 · EducationVanderbilt University: $1,000 · EducationPECONIC LAND TRUST INC: $2,500 · EnvironmentTHE EVERGLADES FOUNDATION INC: $2,500 · EnvironmentOPEN SPACE INSTITUTE INC: $600 · EnvironmentTHE BOYS' CLUB OF NEW YORK: $5,000 · Youth Development
Health$308,750Arts & Culture$27,500Other$17,500Human Services$15,000Education$9,000Environment$5,600Youth Development$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 CENTER FOR DISCOVERY INC: $305,000 over 3y, 0.2% of budgetBrandywine Conservancy & Museum of Art: $15,000 over 1y, 0.0% of budgetTORY BURCH FOUNDATION INC: $15,000 over 2y, 0.4% of budgetTHE BOYS' CLUB OF NEW YORK: $5,000 over 1y, 0.1% of budgetNew York University: $5,000 over 1y, 0.0% of budgetTHE ROCKEFELLER UNIVERSITY: $3,000 over 1y, 0.0% of budgetCOMMON SENSE MEDIA: $2,500 over 1y, 0.0% of budgetOrange County Historical Society: $2,500 over 1y, 0.6% of budgetTHE EVERGLADES FOUNDATION INC: $2,500 over 1y, 0.0% of budgetTHE ORPHAN DISEASE PATHWAY PROJECT: $2,000 over 1y, 0.1% of budgetST JUDE CHILDREN'S RESEARCH HOSPITAL INC: $1,500 over 1y, 0.0% of budgetVanderbilt University: $1,000 over 1y, 0.0% of budgetOPEN SPACE INSTITUTE INC: $600 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.

How much its grantees rely on government

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

2024
’20’21’22’23’24’25
no gov · 20%0%1%3%5%funder's share of their income ↑0%5%10%15%20%share of the org’s income from government →median 6%
  • Cox Science Center and Aquarium Inc: 6% of income from government
no gov moneyreceives it· size = income
2get no government money at all
3report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–20%
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.
04Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to Gigi & Averell H Mortimer Foundation?

Find your warmest path to Gigi & Averell H Mortimer 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 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 2025, released 2025. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

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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