· Private foundation
The William and Diane Nitterhouse 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 FY2021–2025.
Where the money goes
Your grants by size, and where they go.
| Recipient | Amount |
|---|---|
| FRANKLIN COUNTY LIBRARY - LADIES AFTERNOON CLUB | $600 |
| NEW BIRTH COUNCIL OF FREEDOM | $500 |
| NATIONAL PARK FOUNDATION | $125 |
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 (FY21–22, $2k) land where the poverty rate runs at 9%, against an area that typically sits at 9%. 0% 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.
Which US states your grants reach
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.
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.
Advance science, engineering, and innovation throughout the world for the benefit of all. the world's largest multidisciplinary scientific society and a leading publisher of cutting-edge research through its science family of journals,…
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.
Eastern national promotes the public's understanding and support of america's national parks and other public trust partners by providing quality educational experiences, products and services.
The npr foundation ("foundation") is organized and operated exclusively for the benefit of its sole supported organization, national public radio, inc. ("npr inc."). the foundation supports npr inc. through various activities such as…
American gas association's (the association) mission is to develop and advocate for informed, innovative, and durable policy that fulfills our nation's energy needs, environmental aspirations and economic potential. we are committed to…
To sustain, restore, and enhance the nation's fish, wildlife, plants, and habitats.
The western pennsylvania conservancy protects and restores exceptional places to provide our region with clean waters and healthy forests, wildlife and natural areas for the benefit of present and future generations. the conservancy…
The american astronomical society (aas), established in 1899, is the major organization of professional astronomers in north america. the basic objective of the aas is to promote the advancement of astronomy and closely related branches of…
Jefferson national parks association provides quality educational products and related services that enhance public understanding and appreciation of america's national parks, public lands and historic places.
Our mission: to improve the quality of health care.our vision: better health care. better choices. better health.
Visit philadelphia is our name and our mission. as the region's official tourism marketing agency, we build greater philadelphia's image, drive visitation and boost the economy.
Preservation of civil liberties through litigation and public education.
For reference, the grantee most central to the portfolio’s shape is The Heritage Foundation and the most unlike its peers is At the Cross Ministries. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
For each theme you fund, this compares how the sector’s money is shifting with how your own giving is shifting.
Sector change and giving change are each shown relative to their own range, growing (right) or shrinking (left); both normalized, so inflation isn’t mistaken for growth.
Your grantees are a median of 35 years old; the field is 19. You back the established end — and your money leans older still.
The field is 18% startups (under 5 years old) — 4% of your grantees by number, and just 3% of your money.
The orgs you fund almost never close — 0.0% lost their exemption, against 9% of the field you don’t fund.
Age = years since IRS exemption (a founding proxy). “Closed” = auto-revocation for 3 years of non-filing — a floor on closure, not proof, and bigger established orgs lapse least. Association, not causation.
27 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. 27 of the 43 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 SHIPPENSBURG UNIVERSITY FOUNDATION ↗
- Who funds GREENCASTLE-ANTRIM EDUCATION FOUNDATION ↗
- Who funds PENNON ORGANIZATION ↗
- Who funds At the Cross Ministries ↗
- Who funds National Foundation For Cancer Research ↗
- Who funds B O P I C INC ↗
- Who funds NEW FRANKLIN VOLUNTEER FIRE COMPANY ↗
- Who funds AMERICAN CANCER SOCIETY INC ↗
- Who funds CUMBERLAND VALLEY RAILS TO TRAILS ↗
- Who funds ALLISON-ANTRIM MUSEUM INC ↗
- Who funds ST JUDE CHILDREN'S RESEARCH HOSPITAL INC ↗
- Who funds APPALACHIAN TRAIL CONSERVANCY ↗
- Who funds THE HERITAGE FOUNDATION ↗
- Who funds NOAHS HOUSE INC ↗
- Who funds WILSON COLLEGE ↗
- Who funds FORT LOUDON HISTORICAL SOCIETY INC ↗
- Who funds THE BOYS AND GIRLS CLUB OF CHAMBERSBURG AND SHIPPENSBURG INC ↗
- Who funds FAYETTEVILLE VOLUNTEER FIRE DEPARTMENT ↗
- Who funds THOMAS JEFFERSON FOUNDATION INC ↗
- Who funds JUDICIAL WATCH INC ↗
- Who funds SPECIAL OLYMPICS PENNSYLVANIA INC ↗
- Who funds SHALOM CHRISTIAN ACADEMY ASSOCIATION ↗
- Who funds NATIONAL PARK FOUNDATION ↗
- Who funds WORLD WILDLIFE FUND INC ↗
- Who funds Young America's Foundation ↗
- Who funds THE NATURE CONSERVANCY ↗
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: Chambersburg Hospital · The Foundation for Enhancing Communities · McCleary Family Foundation · Stewart Alexander Md Fdn Tr Udeed · Vanguard Charitable Endowment Program · The Bank of America Charitable Foundation Inc · American Online Giving Foundation Inc · 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 The William and Diane Nitterhouse 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 The William and Diane Nitterhouse Foundation?
Find your warmest path to The William and Diane Nitterhouse 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.