Virginia · Private foundation
Marinus and Minna B Koster Foundation
Its FY2025 filing reports that it accepted unsolicited grant applications.
- $225k
- Granted FY2025(still arriving)
- 18
- Grants FY2025
- 19
- Organizations funded FY2024
- 11%
- First-time grantees FY2024
- Median grant, FY2025
- $10,000
- Largest grant, FY2025
- $30,000
- Organizations funded a year
- 17 to 21
- FY2018 to FY2024
- States reached, FY2025
- 5
- Total assets, FY2025
- $7.5M
- Applications
- Takes unsolicited applications
- Per its most recent filing; check its own site
How open it is to new grantees
In FY2024, 11% of the organizations Marinus and Minna B Koster Foundation funded were first-time grantees, receiving 7% of its grant dollars.
New vs renewed · share of each year
In FY2024, 93% of grant dollars renewed an existing relationship; $15k went to new ones.
Where new relationships form · theme of each grantee’s first grant
How this is measured
The numbers by year
| Fiscal year | Organizations funded | To those organizations | First-time grantees |
|---|---|---|---|
| FY2025still arriving | 17 | $225k | 12% |
| FY2024 | 19 | $205k | 11% |
| FY2023 | 17 | $185k | 18% |
| FY2022 | 21 | $250k | 19% |
| FY2021 | 20 | $223k | 20% |
| FY2020 | 17 | $181k | 24% |
| FY2019 | 21 | $206k | 14% |
| FY2018 | 20 | $180k | n/a |
What it funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year, FY2018 to 2025.
Top grantees
Largest recipients by total granted, FY2018 to FY2025, and the share of each one’s budget the grants supplied at peak.
| Grantee | Total granted | Years | Share of their budget |
|---|---|---|---|
| Edlavitch Jewish Community Center of Washington DC Inc | $164,000 | 7 | 0% |
| Pennsylvania Women Work | $126,000 | 8 | 2% |
| DC Youth Orchestra Program | $125,500 | 8 | 1% |
| Sitar Arts Center | $121,500 | 8 | 1% |
| The Forward Association Inc | $90,000 | 8 | 0% |
| American University | $88,000 | 8 | 0% |
| In Geveb Inc | $78,000 | 8 | 41% |
| University of Maryland College Park Foundation Inc | $67,500 | 8 | 0% |
| American Youth Philharmonic Orchestras | $66,500 | 7 | 1% |
| The Washington Conservatory of Music | $65,500 | 7 | 1% |
Show all 26 grantees
What it could do for these grantees
Plus 16 recipients with no EIN on record ($301k), not named here.
Where it is load-bearing
Marinus and Minna B Koster Foundation supplied at least a quarter of the budget for 1 of its grantees at some point. The chart plots its 26 largest grantees; load-bearing ones sit top left.
Tap a dot to name the grantee.
How this is measured
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.
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
How this is measured
Compare Marinus and Minna B Koster Foundation with peer funders
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.
About Marinus and Minna B Koster Foundation
- How much does Marinus and Minna B Koster Foundation give?
- Marinus and Minna B Koster Foundation reported 18 grants totaling $225,000 in its FY2025 IRS filing. It funded between 17 and 21 organizations a year over FY2018 to FY2024.
- What does Marinus and Minna B Koster Foundation fund?
- By grant dollars over FY2018 to FY2025, its largest causes are Arts & Culture (59%), Human Services (13%), Employment (9%).
- Who are Marinus and Minna B Koster Foundation's largest grantees?
- By total granted over FY2018 to FY2025: Edlavitch Jewish Community Center of Washington DC Inc ($164k), Pennsylvania Women Work ($126k), DC Youth Orchestra Program ($126k).
- Does Marinus and Minna B Koster Foundation fund new organizations?
- In FY2024, 11% of the organizations it funded were first-time grantees.
- Does Marinus and Minna B Koster Foundation accept unsolicited applications?
- Its most recent filing reports that it accepts unsolicited grant applications.
- Which funders back the same organizations as Marinus and Minna B Koster Foundation?
- Its strongest co-funders, measured against what their size predicts, include Clark-Winchcole Foundation, The Morris and Gwendolyn Cafritz Foundation, Greater Washington Community Foundation.
- Where is Marinus and Minna B Koster Foundation based?
- Marinus and Minna B Koster Foundation is based in VA.
Play a game based on Marinus and Minna B Koster’s filings →