Mission
Rooted in the Marianist spirit, St. Marys South Side Catholic High School forms all young men as leaders in a brotherhood of unity, empathy, dignity, and respect to uplift our neighborhood, community, and world.
Public Charity
St Mary's South Side Catholic High School
St Mary's South Side Catholic High School is a nonprofit organization categorized as Public Charity based in Saint Louis, MO. Its most recent IRS filing (2025) reports revenue of $4.5M, expenses of $6.0M, total assets of $3.5M. Imperigo tracks 8 reported grant relationships connected to this organization totaling approximately $2.2M.
EIN: 920686634
Saint Louis, MO
Latest filing: 2025
Total Revenue$4.5M
Total Expenses$6.0M
Total Assets$3.5M
Grant Records8
Funding Total$2.2M
Filing Years2023–2025
Sample Grants Received
EDUCATION
$691,862
For grant recipient's exempt purposes
$74,361
PROGRAM ACTIVITY FUNDING
$46,498
EDUCATION
$553,800
PROGRAM ACTIVITY FUNDING
$244,233
Showing up to 5 of 8 total records — full history available with membership.
Officers & Directors
Board Member
Amie Koenen
Board Vice-President
Bob Schillinger
Board President
Brian Daniels
Board Member
Deacon Dan Donnelly
Board Member
Demos Argyros
Board Member
Francis Slay
Officer compensation and complete director data available with membership.
Top Grant Purposes
Financial Trends
| Year | Revenue | Expenses | Assets |
|---|---|---|---|
| 2025 | $4.5M | $6.0M | $3.5M |
| 2024 | $6.8M | $5.8M | $5.2M |
| 2023 | $3.5M | $305K | $3.2M |
Between 2023 and 2025, reported annual revenue grew from $3.5M to $4.5M (+27%), with total assets most recently reported at $3.5M.
Interactive year-over-year charts and full filing details available with membership.