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New Jersey · Private foundation

The Rothenberg Ludden Trust

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.

$100k
Granted FY2025(still arriving)
5
Grants FY2025
14
Organizations funded FY2024
36%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$10,000
Largest grant, FY2025
$50,000
Organizations funded a year
2 to 14
FY2018 to FY2024
States reached, FY2025
1
Total assets, FY2025
$907k
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 36% of the organizations The Rothenberg Ludden Trust funded were first-time grantees, receiving 14% of its grant dollars.

New vs renewed · share of each year

In FY2024, 86% of grant dollars renewed an existing relationship; $35k went to new ones.

50%100%’18’19’20’21’22’23’24
RenewedFirst-time

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

’18’19’20’21’22’23’24
EnvironmentAnimalsRecreation & SportsInternationalOther
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 arriving5$100k40%
FY202414$259k36%
FY20236$181k33%
FY20224$112k25%
FY202110$158k40%
FY20207$94k71%
FY20194$130k50%
FY20182$140k0%
95% classified

What it funded, over time

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

Environment$1.0MAnimals$181kRecreation & Sports$30kCommunity Improvement$15kScience & Tech$10kHealth$3kOther$0

Where its grants go

Grant dollars by states, across the years we hold.

Which US states its grants reach

WA
MN
NY
CT
VA
AZ
DC
FL

Top grantees

Largest recipients by total granted, FY2017 to FY2025, and the share of each one’s budget the grants supplied at peak.

Show all 15 grantees
All grantees of The Rothenberg Ludden Trust by total granted
GranteeTotal grantedYearsShare of their budget
Rainforest Alliance Inc$392,50080%
Nunataks Ltd D/B/A Greenburgh Nature Center$275,00056%
Wildlife Conservation Society$175,00050%
Untermyer Gardens Conservancy Inc$30,00021%
New York Botanical Garden$30,00030%
Riverkeeper Inc$20,00030%
Westchester Land Trust Inc$18,00030%
Rainforest Trust$17,00030%
350org$10,00020%
The Bronx Is Blooming$10,0001n/a
Environmental Defense Fund Incorporated$5,00010%
National Wildlife Federation$5,00010%
Save the Sound$5,00010%
Melanoma Research Foundation$2,50010%
Save the Chimps Inc$1,00010%

What it could do for these grantees

Plus 8 recipients with no EIN on record ($259k), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget The Rothenberg Ludden Trust supplied at peak.

25%50%75%100%$10M$100Mgrantee revenue →↑ funder's share of their budgetRainforest Alliance Inc: $392,500 over 8y, 0.2% of budgetNunataks Ltd D/B/A Greenburgh Nature Center: $275,000 over 5y, 5.5% of budgetWildlife Conservation Society: $175,000 over 5y, 0.0% of budgetUntermyer Gardens Conservancy Inc: $30,000 over 2y, 0.8% of budgetNew York Botanical Garden: $30,000 over 3y, 0.0% of budgetRiverkeeper Inc: $20,000 over 3y, 0.2% of budgetWestchester Land Trust Inc: $18,000 over 3y, 0.4% of budgetRainforest Trust: $17,000 over 3y, 0.1% of budget350org: $10,000 over 2y, 0.0% of budgetEnvironmental Defense Fund Incorporated: $5,000 over 1y, 0.0% of budgetNational Wildlife Federation: $5,000 over 1y, 0.0% of budgetSave the Sound: $5,000 over 1y, 0.1% of budgetMelanoma Research Foundation: $2,500 over 1y, 0.1% of budgetSave the Chimps Inc: $1,000 over 1y, 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 14.

Compare The Rothenberg Ludden Trust with peer funders

About The Rothenberg Ludden Trust

How much does The Rothenberg Ludden Trust give?
The Rothenberg Ludden Trust reported 5 grants totaling $100,000 in its FY2025 IRS filing. It funded between 2 and 14 organizations a year over FY2018 to FY2024.
What does The Rothenberg Ludden Trust fund?
By grant dollars over FY2017 to FY2025, its largest causes are Environment (80%), Animals (14%), Recreation & Sports (2%).
Who are The Rothenberg Ludden Trust's largest grantees?
By total granted over FY2017 to FY2025: Rainforest Alliance Inc ($393k), Nunataks Ltd D/B/A Greenburgh Nature Center ($275k), Wildlife Conservation Society ($175k).
Does The Rothenberg Ludden Trust fund new organizations?
In FY2024, 36% of the organizations it funded were first-time grantees.
Does The Rothenberg Ludden Trust 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.
Where is The Rothenberg Ludden Trust based?
The Rothenberg Ludden Trust is based in NJ.

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 24 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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