· Private foundation
Marinus and Minna B Koster Foundation
Its FY2025 filing reports that it accepted unsolicited grant applications.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2018–2025.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2025
- Under $10k4 grants · $29k
- $10k–50k14 grants · $196k
| Recipient | Amount |
|---|---|
| EDLAVITCH JEWISH COMMUNITY CENTER OF DC | $30,000 |
| DC YOUTH ORCHESTRA PROGRAM | $20,000 |
| PENNSYLVANIA WOMEN WORK | $18,000 |
| SITAR ARTS CENTER | $18,000 |
| UNIVERSITY OF MARYLAND COLLEGE PARK FOUNDATION | $15,000 |
| CENTER FOR TRADITIONAL MUSIC AND DANCE | $13,000 |
| AMERICAN YOUTH PHILHARMONIC ORCHESTRAS | $12,000 |
| END SIJS BACKLOG COALITION | $10,000 |
| AVODAH THE JEWISH SERVICE CORPS | $10,000 |
| STRATHMORE HALL FOUNDATION | $10,000 |
| THE WORKERS CIRCLE | $10,000 |
| AMERICAN UNIVERSITY | $10,000 |
| STRATHMORE HALL FOUNDATION | $10,000 |
| THE FORWARD ASSOCIATION | $10,000 |
| EDU-FUTURO | $8,000 |
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 (FY18–25, $168k) land where the poverty rate runs at 11%, against an area that typically sits at 8%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-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.
Where the work is directed
The same grants, placed two ways — where each recipient sits, and where its stated purpose earmarks the money.
About 5% of Marinus and Minna B Koster Foundation’s grant dollars are earmarked, by their stated purpose, for a different county than the recipient’s own address — money that lands at a nonprofit in one place but is meant to do its work in another.
Recipient view: each grant at its grantee’s ZIP, mapped to a county. Directed view: each grant at the county its stated purpose names, falling back to the recipient’s county when the purpose names no place; US grants only. A county shows only if it carries the top 95% of that view’s dollars. Purposes are read from the foundation’s own 990 grant descriptions.
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 +29% since the first grant, against +19% for the ones you funded once.
26 repeat relationships — 15 still active in FY2025, 11 since wound down; 2 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, 82% of grant dollars renewed an existing relationship; $40k 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
- EJEDLAVITCH JEWISH COMMUNITY CENTER OF WASHINGTON DC INC7× · 2018–2024 · $164k · revenue +22%
- PWPENNSYLVANIA WOMEN WORK8× · 2018–2025 · $126k · revenue +47%
DC YOUTH ORCHESTRA PROGRAM8× · 2018–2025 · $126k · revenue +57%
Funded once
- TJTHE JEWISH SERVICE CORPSone grant, 2022 · $13k
WORLD CENTRAL KITCHEN INCone grant, 2022 · $12k · revenue -40%- LSLUTHERAN SOCIAL SERVICES NATIONAL CAPITAL AREAINCone grant, 2022 · $12k · revenue +19%
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.
For over 150 years, the 92nd street y, new york has been serving its communities and the larger world by bringing people together (continued on schedule o)and providing exceptional, groundbreaking programs in the performing and visual…
Manhattan school of music is deeply committed to excellence in education, performance, and creative activity; to the humanity of the school's environment; and to the cultural enrichment of the larger community. a premiere international…
The weitzman national museum of american jewish history, on independence mall in philadelphia, presents educational programs and experiences that preserve, explore, and celebrate the history of jews in america. its purpose is to connect…
Move|nyc| is a civic arts and social justice organization committed to cultivating a more diverse and inclusive society through transforming the field of professional dance. more than an arts organization, move|nyc| is a movement for…
For more than a century, diller-quaile has offered an environment where music can flourish in all its aspects, enriching the lives of students of all ages and cultural backgrounds. the belief that music is a fundamental part of human life…
The san francisco jazz organization (the organization) is a recognized international leader in jazz creation, presentation, and education. the organization explores the full spectrum of jazz, from the music's origins in the african…
The mission of the organization is to discover and launch the careers of extraordinary young classical musicians, and to expand the reach and relevance of classical music.
The mission of the jewish museum is to collect, preserve, exhibit and interpret art and jewish culture. see schedule o for more information.
The mission of the annapolis symphony orchestra is to inspire, educate and enrich lives near and far by creating extraordinary musical experiences with uncompromising artistic excellence.
Equity arc is a coalition charged by its diverse membership of local and national organizations to align, promote, and develop equitable opportunities for aspiring classical musicians from underrepresented ethnicities.
AJC's mission is to enhance the wellbeing of the Jewish people and Israel, and to advance human rights and democratic values in the United States and around the world. In pursuit of this mission, AJC advances democratic principles, fights…
Prepares gifted graduates of prestigious music programs for successful careers in orchestras and ensembles.
For reference, the grantee most central to the portfolio’s shape is The Forward Association Inc and the most unlike its peers is In Geveb Inc. 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 44 years old; the field is 16. You back the established end — and your money leans older still.
The field is 22% startups (under 5 years old) — 0% of your grantees by number, and just 0% of your money.
The orgs you fund almost never close — 0.0% lost their exemption, against 13% 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.
26 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. 26 of the 42 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 EDLAVITCH JEWISH COMMUNITY CENTER OF WASHINGTON DC INC ↗
- Who funds PENNSYLVANIA WOMEN WORK ↗
- Who funds DC YOUTH ORCHESTRA PROGRAM ↗
- Who funds SITAR ARTS CENTER ↗
- Who funds The Forward Association Inc ↗
- Who funds AMERICAN UNIVERSITY ↗
- Who funds In Geveb Inc ↗
- Who funds UNIVERSITY OF MARYLAND COLLEGE PARK FOUNDATION INC ↗
- Who funds AMERICAN YOUTH PHILHARMONIC ORCHESTRAS ↗
- Who funds THE WASHINGTON CONSERVATORY OF MUSIC ↗
- Who funds THE STRATHMORE HALL FOUNDATION INC ↗
- Who funds LEVINE MUSIC INC ↗
- Who funds BLUES ALLEY JAZZ SOCIETY ↗
- Who funds Center for Traditional Music and Dance Inc ↗
- Who funds EDU-FUTURO ↗
- Who funds AVODAH THE JEWISH SERVICE CORPS INC ↗
- Who funds BENDER JCC OF GREATER WASHINGTON ↗
- Who funds WORLD CENTRAL KITCHEN INC ↗
- Who funds LUTHERAN SOCIAL SERVICES NATIONAL CAPITAL AREAINC ↗
- Who funds NATIONAL IMMIGRATION PROJECT OF THE NATIONAL LAWYERS GUILD INC ↗
- Who funds MIGRATION RESOURCE CENTER ↗
- Who funds JEWISH FAMILY AND CHILDREN'S SERVICE OF PITTSBURGH ↗
- Who funds PLYMOUTH PHILHARMONIC ORCHESTRA INC ↗
- Who funds HIAS INC ↗
- Who funds JEWISH SOCIAL SERVICE AGENCY ↗
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: Clark-Winchcole Foundation · The Morris and Gwendolyn Cafritz Foundation · Greater Washington Community Foundation · Galena-Yorktown Foundation · Dimick Foundation John M Lynham Jr Trustee · Dallas Morse Coors Foundation for the Performing Arts · Howard and Geraldine Polinger Family Foundation · World Bank Community Connections Fund · Philip L Graham Fund co Graham Holdings Company · Hattie M Strong Foundation · Harman Family Foundation · Arts and Humanities Council of Montgomer
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 Marinus and Minna B Koster 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, a single department, or state — and drag the year to watch it move.
- Hias Inc — 88% of income from government
- The Strathmore Hall Foundation Inc — 7% of income from government
- Bender Jcc of Greater Washington — 1% of income from government
- Jewish Social Service Agency — 1% of income from government
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 Marinus and Minna B Koster Foundation?
Find your warmest path to Marinus and Minna B Koster 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.