Private Foundation

MARINUS AND MINNA B KOSTER FOUNDATION

MARINUS AND MINNA B KOSTER FOUNDATION is a Private Foundation headquartered in POTOMAC FALLS, VA. Financial data from the 2025 filing: $455K revenue, $373K expenses, $7.5M total assets. IRS filings disclose 172 grants awarded by this foundation, totaling roughly $1.8M.

EIN: 271533411 POTOMAC FALLS, VA Private Independent Foundations NTEE: T22 Latest filing: 2025
Total Revenue$455K
Total Expenses$373K
Total Assets$7.5M
Grants Given172
Grant Total$1.8M
Filing Years2020–2025

Sample Grants Given

EDLAVITCH JEWISH COMMUNITY CENTER OF DC
WASHINGTON, DC · 2024
THEATER J'S YIDDISH THEATER LAB
$30,000
DC YOUTH ORCHESTRA PROGRAM
WASHINGTON, DC · 2024
2025-2026 TALENT DEVELOPMENT PROGRAM
$20,000
SITAR ARTS CENTER
WASHINGTON, DC · 2024
2025-2026 INSTRUMENTAL MUSIC ACADEMY
$18,000
PENNSYLVANIA WOMEN WORK
PITTSBURGH, PA · 2024
REFUGEE & IMMIGRANT SERVICES FOR EMPLOYMENT
$18,000
UNIVERSITY OF MARYLAND COLLEGE PARK FOUNDATION
COLLEGE PARK, MD · 2024
NATIONAL ORCHESTRAL INSTITUTE +FESTIVAL SCHOLARSHIPS
$15,000

Showing up to 5 of 172 total records — full history available with membership.

Officers & Directors

SECRETARY Barbara Freedman
TREASURER Michael T Flynn
ADVISOR Miriam Isaacs
PRESIDENT Rosette M Wills
ADVISOR Sterling E Scroggins

Officer compensation and complete director data available with membership.

Top Grant Purposes

SUPPORT MUSIC EDUCATION FOR MUSICALLY-TALENTED YOUTH AND YOUNG ADULTS
$230,000 24 grants
PRESERVATION OF YIDDISH LANGUAGE & CULTURE
$181,000 23 grants
AID JEWISH IMMIGRANTS WITH HOUSING, LANGUAGE, JOB TRAINING AND OTHER ASSISTANCE
$155,000 14 grants
TO SUPPORT THE FOURTH YEAR OF THEATER J'S YIDDISH THEATER LAB, A PROGRAM DEVOTED TO DEVELOPING NEW AUDIENCES FOR, NEW ADAPTATIONS OF, AND NEW DIRECTORIAL APPROACHES TO WORK FROM THE YIDDISH THEATER CANON.
$103,000 4 grants
TO ASSIST REFUGEES AND IMMIGRANTS IN PITTSBURGH WHO ARE SEEKING TO RESTART THEIR CAREERS OR IMPROVE THEIR LEVEL OF EMPLOYMENT.
$66,000 4 grants

Financial Trends

Year Revenue Expenses Assets
2025 $455K $373K $7.5M
2024 $464K $330K $7.0M
2023 $212K $326K $6.3M
2021 $203K $344K $6.9M
2020 $223K $303K $5.1M

Between 2020 and 2025, reported annual revenue grew from $223K to $455K (+104%), with total assets most recently reported at $7.5M.

Interactive year-over-year charts and full filing details available with membership.

Grant Geography

Grants from this foundation were reported to recipients in DC, MA, MD, NY, PA, VA.

DCMAMDNYPAVA

Full geographic grant map with state-by-state breakdown available with membership.

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