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Massachusetts · Private foundation

Harris J and Geraldine S Nelson 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.

$72k
Granted FY2025(still arriving)
18
Grants FY2025
15
Organizations funded FY2024
53%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$3,000
Largest grant, FY2025
$27,000
Organizations funded a year
5 to 15
FY2018 to FY2024
States reached, FY2025
8
Total assets, FY2025
$694k
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 53% of the organizations Harris J and Geraldine S Nelson Foundation funded were first-time grantees, receiving 33% of its grant dollars.

New vs renewed · share of each year

In FY2024, 67% of grant dollars renewed an existing relationship; $23k went to new ones.

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

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

’19’20’21’22’23’24
EducationPhilanthropyArts & CultureHealthRecreation & SportsAnimalsOther
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.
The numbers by year
Fiscal yearOrganizations fundedTo those organizationsFirst-time grantees
FY2025still arriving18$72k39%
FY202415$71k53%
FY20238$58k13%
FY20229$47k22%
FY20218$43k38%
FY20207$39k43%
FY201910$75k60%
FY20185$42kn/a
96% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2018 to 2025.

Arts & Culture$111kEducation$107kInternational$92kRecreation & Sports$46kHealth$32kHuman Services$17kAnimals$10kPhilanthropy$7kOther$0

Where its grants go

Grant dollars by states, across the years we hold.

Which US states its grants reach

MN
NY
MA
CT
RI
CA
NM
TN
NC
DC

Top grantees

Largest recipients by total granted, FY2018 to FY2025, and the share of each one’s budget the grants supplied at peak.

Show all 24 grantees

What it could do for these grantees

Plus 11 recipients with no EIN on record ($250k), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget Harris J and Geraldine S Nelson Foundation supplied at peak.

25%50%75%100%$100k$1.0M$10Mgrantee revenue →↑ funder's share of their budgetHarvard Lampoon Trust: $55,000 over 6y, 1.8% of budgetThe Cultural Landscape Foundation: $15,000 over 2y, 0.1% of budgetLawrence Community Health Services: $14,500 over 4y, 0.1% of budgetPartnership for Providence Parks: $13,500 over 5y, 0.9% of budgetSanta Fe Art Institute Inc: $8,000 over 1y, 0.9% of budgetCommonwealth Corporation Foundation: $7,250 over 4y, 1.2% of budgetCancer Foundation for New Mexico: $6,500 over 2y, 0.2% of budgetWildlife Conservation Network Inc: $4,000 over 1y, 0.0% of budgetKeres Children's Learning Center: $4,000 over 1y, 0.1% of budgetSunrise Clinics: $3,500 over 1y, 0.0% of budgetAmigos Bravos Inc: $3,000 over 1y, 0.2% of budgetThe Bronxville School Foundation Inc: $2,750 over 4y, 0.2% of budgetThe Horse Shelter: $2,500 over 1y, 0.1% of budgetFriends of the Public Garden Inc: $2,400 over 6y, 0.0% of budgetThe Children's Museum of Memphis Inc: $2,400 over 5y, 0.0% of budgetBronxville Beautification Council: $2,250 over 4y, 1.8% of budgetAmerican Humane Association: $2,000 over 1y, 0.0% of budgetProprietors of the Boston Athenaeum: $550 over 1y, 0.0% of budgetGramatan Village Inc: $500 over 1y, 0.3% of budgetEthel Walker School Inc: $500 over 1y, 0.0% of budgetJohn Fitzgerald Kennedy Library Foundation Incorporated: $400 over 2y, 0.0% of budget

Tap a dot to name the grantee.

How this is measured
Share of budget is the funder’s grant in a year over the grantee’s total revenue that year, at its highest across the years we hold; revenue is from all sources. Only grantees confirmed against their own filings, whose grants do not exceed their revenue, are plotted: the largest 21.

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.

Santa Fe Community FoundationNM19.5× affinity7 shared granteesties to 6 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Santa Fe Community Foundation · Marilynn and John Hill Foundation Inc · Tracy Flanigan McVey Family Foundation · The Nagle Family Foundation · The Joan C and David L Henle Foundation · Esmond Nissim Foundation Inc Co Bosworth Gray & Fuller Esq · Marshall L and Perrine D McCune Charitable Foundation Inc · Amg Charitable Gift Foundation · The Chicago Community Trust · Jewish Communal Fund · National Philanthropic Trust · Vanguard Charitable Endowment Program

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.

Compare Harris J and Geraldine S Nelson Foundation with peer funders

Warm introductions · Powered by PlinthPlus

How do I get to Harris J and Geraldine S Nelson Foundation?

Find your warmest path to Harris J and Geraldine S Nelson 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.

About Harris J and Geraldine S Nelson Foundation

How much does Harris J and Geraldine S Nelson Foundation give?
Harris J and Geraldine S Nelson Foundation reported 18 grants totaling $71,500 in its FY2025 IRS filing. It funded between 5 and 15 organizations a year over FY2018 to FY2024.
What does Harris J and Geraldine S Nelson Foundation fund?
By grant dollars over FY2018 to FY2025, its largest causes are Arts & Culture (25%), Education (24%), International (21%).
Who are Harris J and Geraldine S Nelson Foundation's largest grantees?
By total granted over FY2018 to FY2025: Harvard Lampoon Trust ($55k), University of North Carolina at Chapel Hill ($42k), The Cultural Landscape Foundation ($15k).
Does Harris J and Geraldine S Nelson Foundation fund new organizations?
In FY2024, 53% of the organizations it funded were first-time grantees.
Does Harris J and Geraldine S Nelson Foundation accept unsolicited applications?
Its most recent filing reports that it funds preselected organizations and does not take unsolicited requests. Check the foundation's own site before ruling it out.
Which funders back the same organizations as Harris J and Geraldine S Nelson Foundation?
Its strongest co-funders, measured against what their size predicts, include Santa Fe Community Foundation, Marilynn and John Hill Foundation Inc, Tracy Flanigan McVey Family Foundation.
Where is Harris J and Geraldine S Nelson Foundation based?
Harris J and Geraldine S Nelson Foundation is based in MA.

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 35 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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