· Private foundation
Mouse King 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.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2017–2025.
Where the money goes
Your grants by size, and where they go.
| Recipient | Amount |
|---|---|
| CAMP PA-QUA-TUCK | $5,200 |
| MAINE COAST HERITAGE TRUST | $1,000 |
| FRIENDS OF SEARS ISLAND | $1,000 |
| FRIENDS OF GANONDAGAN | $1,000 |
| LAKES REGION CONSERVATION TRUST | $1,000 |
| MOOSE MOUNTAINS REGIONAL GREENWAYS | $1,000 |
Do your dollars go where the need is?
Each grant placed by the hardship in its grantee’s ZIP, then read against the area’s typical level.
Your human-services grants (FY17–23, $33k) land where the poverty rate runs at 7%, against an area that typically sits at 7%. 11% of those dollars go to grantees based in above-average-need neighborhoods. Your grants skew toward lower-need ZIPs.
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty linein the grantee’s ZIP, averaged from the tracts in that ZIP; grantee ZIP can differ from where services are delivered.
US grants placed by each grantee’s ZIP, which can differ from where services are actually delivered. Need from public data — U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA — shown as context about the area, never attributed to your giving.
Who you back again
Which organizations you funded more than once, and which you funded a single time. Each grantee is matched to its own filings.
And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +98% since the first grant, against 0% for the ones you funded once.
7 repeat relationships — 1 still active in FY2025, 6 since wound down; 5 grantees were first funded in FY2025 (too recent to call).
How the two cohorts compare
Organizations
Total granted
Median revenue growth · since first grant
Still filing today
New vs renewed · share of each year
In FY2025, 51% of grant dollars renewed an existing relationship; $5k went to new ones.
Where new relationships form · theme of each grantee’s first grant
First-time = a grantee’s first year in your filing window; renewed = funded in an earlier year too. As a portfolio matures the renewed share naturally climbs — once funded, an org stays “renewable” — so the signal is the years that buck it (a new-grantee intake wave). 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
- MRMORICHES ROTARY HEALTH CAMP INC9× · 2017–2025 · $45k · revenue +38%
- EEEast End Hospice Inc5× · 2019–2023 · $27k · revenue +57%
MEDECINS SANS FRONTIERES USA INC2× · 2017–2018 · $7k · revenue +98%
Funded once
- MHMA'S HOUSE & BIPOC ART STUDIO INCone grant, 2024 · $5k · revenue 0%
Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.
The map has a center of gravity: the average direction from the rest of the sector toward the organizations the foundation funds — the shape of its giving. Scoring every nonprofit along that direction surfaces the ones that look most like the portfolio. These are the closest matchesthat aren’t grantees — a resemblance in what they say they do, not a recommendation.
The mission of Midcoast Conservancy is to protect vital lands and waters on a scale that matters and to inspire wonder and action on behalf of all species and the Earth.
The mission of the mount desert land & garden preserve is to conserve and share the beauty of our historic lands and gardens.
To enhance, every day, the health of our patients, our families and our communities. We do that through a range of health care services for people of all ages, in a variety of care settings.
We conserve land permanently to benefit the natural and human communities of western the Penobscot Bay region.
To preserve and protect land surrounding the appalachian trail in maine for public benefit.
To protect and conserve land and traditional land uses including farming, recreation, significant habitats, scenery, and water resources for the benefit of the public. The organization facilitates community-based conservation.
Conservation and preservation of land.
Dedicated to permanently preserve the natural, scenic and recreational resources of the Lake George Basin.
Adk is the only non-profit organization in new york state dedicated to the conservation, preservation, and responsible recreational use of the new york state forest preserve and other parks, wild lands, and waters vital to our members and…
The mission of Islesboro Islands Trust is to enhance the quality of residents' lives through the preservation of open space, educate all residents as to the value of the island's natural ecosystems, and act as an environmental advocate on…
To provide the residents of the health center with the highest level of comprehensive medical care services with a considerate and personal touch.
Protect Connecticuts farmland for agricultural use by purchasing and accepting donations of agricultural conservation easements
For reference, the grantee most central to the portfolio’s shape is Medecins Sans Frontieres Usa Inc and the most unlike its peers is Ma's House & Bipoc Art Studio Inc. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
11 grantees tracked through their own filings, 2017–2025.
Each one resolved to its own IRS returns and tracked year by year — your grant beside their revenue from every source. Association, dated; never a causal claim.
Counted here: distinct organizations you funded across 2017–2025, not grant rows in a single year — so this will not match the grant count on the cover. 11 of the 13 grantees resolved in that span have returns of their own we could reconcile; the rest are funded organizations whose filings we could not track year by year.
Where your money sits — by cause, then by grantee
Each org by its size and your share of it — top-left is where you’re load-bearing
Go grantee by grantee — a decade per org, and how each moved after you funded them
A decade per grantee — revenue shaded, your grants as bars, all rows on one timeline.
- Who funds MORICHES ROTARY HEALTH CAMP INC ↗
- Who funds East End Hospice Inc ↗
- Who funds MEDECINS SANS FRONTIERES USA INC ↗
- Who funds AMYOTROPHIC LATERAL SCLEROSIS ASSN ↗
- Who funds MA'S HOUSE & BIPOC ART STUDIO INC ↗
- Who funds CATSKILL AREA HOSPICE AND PALLIATIVE CARE INC DBA HELIOS CARE ↗
- Who funds TIMOTHY HILL CHILDREN'S RANCH INC ↗
- Who funds Maine Coast Heritage Trust ↗
- Who funds MOOSE MOUNTAINS REGIONAL GREENWAYS ↗
- Who funds Lakes Region Conservation Trust ↗
- Who funds FRIENDS OF GANONDAGAN INC ↗
The grantmakers whose grantees overlap with yours far more than size alone predicts. Each orbits closer the stronger the alignment; the arcs between them show where they also fund each other. Here it reads as a tightly interlocked camp — most of these funders back each other's grantees too.
Open a dossier: Donor Advised Charitable Giving Inc · Fidelity Investments Charitable Gift Fund · Amazonsmile Foundation
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. A research starting point: overlap is association, not proof of shared intent.
Government reliance of your grantees
Every dot is one organization Mouse King Foundation funds. Left–right is the share of its income from government; up–down is the share from you. Bigger dots raise more. Filter to federal or a single department — and drag the year to watch it move.
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 your grant caused the public funding. Coverage is precision-first — a floor, not 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 12–24 months.
Warm introductions · Powered by PlinthPlus
How do I get to Mouse King Foundation?
Find your warmest path to Mouse King 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.