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The Della Pietra Foundation at a glance

· Private foundation

The Della Pietra 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.

$5.8M
Granted FY2025still arriving
13
Grants FY2025still arriving
5
States reached
$1.2M
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
0199% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2019 to 2025.

Education$16MScience & Tech$10MPhilanthropy$5.2MHealth$3.8MInternational$1.5MYouth Development$770kArts & Culture$125kHuman Services$50kOther$0
02FY2025 · 13 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k1 grant · $5k
  • $10k–50k3 grants · $65k
  • $50k–250k2 grants · $110k
  • $250k+7 grants · $5.7M
$300,000
Median grant
5
States reached
$67M
Total assets
Largest grants
RecipientAmount
COLD SPRING HARBOR LABORATORY$1,155,000
SIMONS LAUFER MATHEMATICAL SCIENCES INSTITUTE$1,100,000
STONY BROOK FOUNDATION$1,089,658
SURGEONS DATA SCIENCE COLLECTIVE INC$1,000,000
FRIENDS OF IHES INC NY$510,000
PRESIDENT AND FELLOWS OF HARVARD COLLEGE$510,000
PIVOT WORKS$300,000
WORLD SCIENCE FOUNDATION$60,000
COMMUNITY FOUNDATION OF COLLIER COUNTY$50,000
PLANNED PARENTHOOD HUDSON PECONIC ACTION FUND INC$25,000
HARBOR COUNTRY DAY SCHOOL$20,000
GILBERT AND SULLIVAN LIGHT OPERA COMPANY OF LONG ISLAND INC$20,000
HIGH DESERT KEEPERS ORGANIZATION$5,000
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:

Dollar for dollar, its grants (FY19–25) land where the poverty rate runs at 10%, against an area that typically sits at 9%. 50% of its dollars go to grantees based in above-average-need neighborhoods. Its grants spread fairly evenly across need levels.

area typical 9%PRESIDENT AND FELLOWS OF HARVARD COLLEGE: $510k → 8%PIVOT WORKS: $300k → 16%SIMONS LAUFER MATHEMATICAL SCIENCES INSTITUTE: $1.2M → 10%TAMIL SANGAM NEW YORK INC: $50k → 6%HARBOR COUNTRY DAY SCHOOL: $210k → 7%LIMROY LANE COMMUNITY CHARITABLE FOUNDATION: $100k → 14%WORLD SCIENCE FOUNDATION: $100k → 17%PRESIDENT AND FELLOWS OF HARVARD COLLEGE: $500k → 8%PIVOT WORKS: $250k → 16%MATHEMATICAL SCIENCES RESEARCH INSTITUTE: $1.1M → 10%CHILDREN AND SCREENS INSTITUTE OF DIGITAL MEDIA AND CHILD DEVELOPMENT INC: $260k → 6%HARBOR COUNTRY DAY SCHOOL: $200k → 7%WORLD SCIENCE FOUNDATION: $60k → 17%SURGEONS DATA SCIENCE COLLECTIVE INC: $1.0M → 14%PRESIDENT AND FELLOWS OF HARVARD COLLEGE: $500k → 8%PIVOT WORKS: $250k → 16%MATHEMATICAL SCIENCES RESEARCH INSTITUTE: $1.1M → 10%CHILDREN AND SCREENS INSTITUTE OF DIGITAL MEDIA AND CHILD DEVELOPMENT INC: $250k → 6%HARBOR COUNTRY DAY SCHOOL: $125k → 7%SURGEONS DATA SCIENCE COLLECTIVE INC: $1.0M → 14%PRESIDENT AND FELLOWS OF HARVARD COLLEGE: $500k → 8%PIVOT WORKS: $200k → 16%SIMONS LAUFER MATHEMATICAL SCIENCES INSTITUTE: $1.1M → 10%CHILDREN AND SCREENS INSTITUTE OF DIGITAL MEDIA AND CHILD DEVELOPMENT INC: $250k → 6%PRESIDENT & FELLOWS OF HARVARD COLLEGE: $100k → 8%PIVOT WORKS: $200k → 16%MATHEMATICAL SCIENCES RESEARCH INSTITUTE: $1.1M → 10%FRIENDS OF IHES INC NY: $510k → 17%PIVOT WORKS: $150k → 16%MATHEMATICAL SCIENCES RESEARCH INSTITUTE: $603k → 10%FRIENDS OF IHES INC NY: $505k → 17%PIVOT WORKS: $101k → 16%MATHEMATICAL SCIENCES RESEARCH INSTITUTE: $100k → 10%FRIENDS OF IHES INC NY: $500k → 17%COLD SPRING HARBOR LABORATORY: $1.2M → 7%FRIENDS OF IHES INC NY: $72k → 17%COLD SPRING HARBOR LABORATORY: $1.2M → 7%FRIENDS OF IHES INC NY: $65k → 17%COLD SPRING HARBOR LABORATORY: $1.2M → 7%COLD SPRING HARBOR LABORATORY: $155k → 7%COLD SPRING HARBOR LABORATORY: $53k → 7%STONY BROOK FOUNDATION: $1.1M → 7%STONY BROOK FOUNDATION: $1.1M → 7%STONY BROOK FOUNDATION: $612k → 7%STONY BROOK FOUNDATION: $555k → 7%STONY BROOK FOUNDATION: $541k → 7%STONY BROOK FOUNDATION: $540k → 7%STONY BROOK FOUNDATION: $453k → 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.

Which US states its grants reach

ME
IL
NY
MA
NJ
CA
DC
FL
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.

99%of every dollar goes to organizations it has funded before.
$35M · 12 repeat orgs$305k to everyone else

Grantees it renews have grown median revenue +35% since the first grant, against +27% for those funded once.

12 repeat relationships: 10 still active in FY2025, 2 since wound down; 1 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

12
7

Total granted

$35M
$300k

Median revenue growth · since first grant

+35%
+27%

Still filing today

83%
71%

New vs renewed · share of each year

In FY2025, 100% of grant dollars renewed an existing relationship; $5k went to new ones.

50%100%’19’20’21’22’23’24’25
RenewedFirst-time

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

’19’20’21’22’23’24’25
Science & TechEducationHealthInternationalArts & CultureYouth 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

  • The Trustees of Princeton University
    6× · 2019–2024 · $13M · revenue +5%
  • SL
    SIMONS LAUFER MATHEMATICAL SCIENCES INSTITUTE
    7× · 2019–2025 · $6.3M · revenue +90%
  • SB
    STONY BROOK FOUNDATION INC
    7× · 2019–2025 · $4.9M · revenue +206%

Funded once

  • LL
    Limroy Lane Community Charitable Foundation Inc
    one grant, 2020 · $100k · revenue -100%
  • RM
    Ronald McDonald House Globalgraduated
    one grant, 2023 · $50k · revenue +27%
  • INSTITUTE FOR ADVANCED STUDY - LOUIS BAMBERGER & MRS FELIX FULD FOUNDATIONgraduated
    one grant, 2020 · $50k · revenue +98%
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
Massachusetts Institute of Technology

The mission of mit is to advance knowledge and educate students in science, technology, and other areas of scholarship that will best serve the nation and the world in the 21st century.

Education
2
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
3
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
4
University of New Haven

The University of New Haven is a student-centered comprehensive university with an emphasis on excellence in liberal arts and professional education. Our mission is to prepare our students to lead purposeful and fulfilling lives in a…

Education
5
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
6
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
7
United States Naval Institute

Provide an independent forum for those who dare to read, think, speak, and write to advance the professional, literary, and scientific understanding of sea power and other issues critical to global security.

—
8
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
9
Stony Brook Childrens Services 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 Lieber Institute Inc

The mission of the institute is to translate basic genetic and molecular mechanisms of schizophrenia and related developmental brain disorders into clinical advances that change the lives of affected individuals. it is catalyzing a new…

Health
12
Northeast College of Health Sciences

Northeast college of health sciences (the college) is committed to academic excellence, leadership, and professional best practices in the health sciences.

Education
How this is measured
The grantee most central to the portfolio’s shape is World Science Foundation; the most unlike its peers is Limroy Lane Community Charitable Foundation 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

18 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. 18 of the 22 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.

2
Load-bearing (≥25% of a budget)
1
Early backer (in before they grew)
17/18
Grantees still filing
12/18
Grew since first funded

Where the money sits, by cause and then by grantee

The Trustees of Princeton University: $12,821,776 · EducationThe Trustees of Princeton UniversitySTONY BROOK FOUNDATION INC: $4,861,188 · EducationSTONY BROOK FOUNDATION INCPresident and Fellows of Harvard College: $2,110,000 · EducationPresident and Fellows of Harvard College+1 more: $640,000 · EducationSIMONS LAUFER MATHEMATICAL SCIENCES INSTITUTE: $6,303,468 · Science & TechSIMONS LAUFER MATHEMATICAL SCIE…COLD SPRING HARBOR LABORATORY: $3,706,000 · Science & TechCOLD SPRING HARBOR LABORATORY+2 more: $310,000 · Science & TechFRIENDS OF IHES INC NY: $1,701,500 · OtherCOLLIER COMMUNITY FOUNDATION INC: $190,000 · OtherLimroy Lane Community Charitable Foundation Inc: $100,000 · OtherGILBERT AND SULLIVAN LIGHT OPERA COMPANY OF LONG ISLAND INC: $75,000 · Other+3 more: $75,000 · OtherSURGEON'S DATA SCIENCE COLLECTIVE INC: $2,000,000 · Health+2 more: $115,000 · HealthPIVOT WORKS INC: $1,450,627 · International+1 more: $25,000 · InternationalCHILDREN AND SCREENS-INSTITUTE OF DIGITAL MEDIA AND CHILD DEVELOPMENT INC: $770,000 · Youth DevelopmentFRIENDS OF SCIENCE EAST INC: $5,000 · Arts & Culture
Education$20,432,964Science & Tech$10,319,468Other$2,141,500Health$2,115,000International$1,475,627Youth Development$770,000Arts & Culture$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 Trustees of Princeton University: $12,821,776 over 6y, 0.1% of budgetSIMONS LAUFER MATHEMATICAL SCIENCES INSTITUTE: $6,303,468 over 7y, 6.0% of budgetSTONY BROOK FOUNDATION INC: $4,861,188 over 7y, 0.8% of budgetCOLD SPRING HARBOR LABORATORY: $3,706,000 over 7y, 0.5% of budgetPresident and Fellows of Harvard College: $2,110,000 over 5y, 0.0% of budgetSURGEON'S DATA SCIENCE COLLECTIVE INC: $2,000,000 over 2y, 13% of budgetPIVOT WORKS INC: $1,450,627 over 7y, 3.9% of budgetCHILDREN AND SCREENS-INSTITUTE OF DIGITAL MEDIA AND CHILD DEVELOPMENT INC: $770,000 over 4y, 32% of budgetHARBOR COUNTRY DAY SCHOOL: $640,000 over 7y, 5.3% of budgetWORLD SCIENCE FOUNDATION: $260,000 over 4y, 2.3% of budgetCOLLIER COMMUNITY FOUNDATION INC: $190,000 over 5y, 0.1% of budgetLimroy Lane Community Charitable Foundation Inc: $100,000 over 1y, 9.1% of budgetPLANNED PARENTHOOD HUDSON PECONIC ACTION FUND INC: $65,000 over 4y, 9.8% of budgetRonald McDonald House Global: $50,000 over 1y, 0.1% of budgetINSTITUTE FOR ADVANCED STUDY - LOUIS BAMBERGER & MRS FELIX FULD FOUNDATION: $50,000 over 1y, 0.1% of budgetTAMIL SANGAM NEW YORK INC: $50,000 over 1y, 38% of budgetAMERICAN NEAR EAST REFUGEE AID: $25,000 over 1y, 0.0% of budgetFRIENDS OF SCIENCE EAST INC: $5,000 over 1y, 0.8% 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.

The Allen & Eve Found…National Philanthropi…Vanguard Charitable E…Fidelity Investments …Donor Advised Charita…Amazonsmile Foundation
The Allen & Eve Foundation IncMD13.6× affinity4 shared granteesties to 5 of 5Hover any node to trace its alignments.Compare side by side →

Open a dossier: The Allen & Eve Foundation Inc · National Philanthropic Trust · Vanguard Charitable Endowment Program · Fidelity Investments Charitable Gift Fund · 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 The Della Pietra Foundation funds: left to right is the share of its income from government, bottom to top the share from The Della Pietra Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 10%3%10%23%40%funder's share of their income ↑0%19%38%56%75%share of the org’s income from government →median 7%
  • The Trustees of Princeton University: 11% of income from government
  • Institute for Advanced Study - Louis Bamberger & Mrs Felix Fuld Foundation: 7% of income from government
  • President and Fellows of Harvard College: 7% of income from government
no gov moneyreceives it· size = income
1get 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 · 0–75%
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 22 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 Della Pietra’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