Private Foundation

THE STRIBLING FOUNDATION INC C/O R STRIBLING KOSTER

THE STRIBLING FOUNDATION INC C/O R STRIBLING KOSTER, of WINNETKA, IL, is a Private Foundation tracked in Imperigo's IRS 990 database. The 2025 filing shows $222K in revenue, $122K in expenses, $1.9M in total assets. IRS filings disclose 84 grants awarded by this foundation, totaling roughly $586K.

EIN: 431847629 WINNETKA, IL Latest filing: 2025

Total Revenue$222K

Total Expenses$122K

Total Assets$1.9M

Grants Given84

Grant Total$586K

Filing Years2021–2025

Sample Grants Given

MISSOURI MILITARY ACADEMY

MEXICO, MO · 2024

MEXICO COMMUNITY SCHOLARSHIP

$15,000

WASHINGTON UNIVERSITY

ST LOUIS, MO · 2024

JOSEPH C KOSTER MEMORIAL FUND

$15,000

BOY SCOUTS OF AMERICA

COLUMBIA, MO · 2024

CHARITABLE DONATION

$10,000

WOUNDED WARRIOR PROJECT

TOPEKA, KS · 2024

CHARITABLE DONATION

$10,000

UNITED WAY OF AUDRAIN COUNTY

MEXICO, MO · 2024

CHARITABLE DONATION

$10,000

Showing up to 5 of 84 total records — full history available with membership.

Officers & Directors

DIRECTOR Ann Koster Antoniou

PRESIDENT/SE R Stribling Koster

DIRECTOR Winifred Runge Stribling

Officer compensation and complete director data available with membership.

Top Grant Purposes

CHARITABLE DONATION

$500,387 73 grants

MEXICO COMMUNITY SCHOLARSHIP

$55,633 8 grants

JOSEPH C KOSTER MEMORIAL FUND

$25,000 2 grants

GENERAL FUND

$5,000 1 grant

Financial Trends

Year	Revenue	Expenses	Assets
2025	$222K	$122K	$1.9M
2024	$96K	$110K	$1.8M
2023	$-7K	$102K	$1.9M
2022	$253K	$111K	$2.0M
2021	$100K	$34K	$1.8M

Between 2021 and 2025, reported annual revenue grew from $100K to $222K (+121%), with total assets most recently reported at $1.9M.

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

Grant Geography

Grants from this foundation were reported to recipients in IL, KS, MO.

ILKSMO

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

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