Louis W Riethmann Jr Foundation
Louis W Riethmann Jr Foundation is a nonprofit organization, based in Clayton, MO. IRS filing data is available from 2020 through 2025. In 2025, it awarded 1 grant totaling $111K.
Key facts about Louis W Riethmann Jr Foundation
In short: Louis W Riethmann Jr Foundation gave $111K across 1 grant in 2025 (avg $111K), mostly in Missouri. Source: 2025 IRS Form 990 filing.
- EIN
- 46-0645591
- Latest 990 filing
- Form 990 filing, 2025
- Annual giving (2025)
- $111,346
- Grants made (2025)
- 1
- Average grant
- $111,346
- Median grant
- $111,346
- Primary geography
- Missouri (100% of itemized 2025 grant dollars)
Data from IRS Form 990 filing, 2025; updated September 2026.
Financial Overview
From 2025 IRS Form 990 filing · View filing
Total Assets
—
Annual Giving
$111K
+5.3% YoY
Grant Count
1
+0.0% YoY
Avg Grant Size
$111K
+5.3% YoY
How Louis W Riethmann Jr Foundation gives
- Giving held roughly steady from 2022 to 2025 (−2%). Method
From the foundation's IRS Form 990 filings. Methodology.
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Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of the 2025 grant dollars on its one itemized grant.
States
Cities
Giving Over Time
Total grant dollars and number of grants per year
From 2020 to 2025, annual grant giving ranged from $102K (2020) to $124K (2023). In 2025 it made 1 grant totaling $111K.
Grant Insights
How this funder distributes its grants
Top Recipients
Top recipient in 2025
The largest 2025 recipient was Loyola Academy of St Louis ($111K).
Grant Size Distribution
5 grants across all recorded years
The most common grant size was in the $100–250K range: 5 grants of 5 (100%).
Giving History
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Loyola Academy of St Louis St. Louis, MO | General Operations | $111,346 |
Data update history
When this profile's IRS filing data changed on Grantable
- IRS filings on file for fiscal years 2020–2025
Leadership & Key People
Officers and directors from IRS filings
Louis W Riethmann Jr Foundation's 2025 filing lists 2 officers; 1 of 2 officers listed in 2025 is compensated.
Officers on the 2025 filing
John D. Schaperkotter
Co-Trustee
On filings since 2020
2 hrs/week
$2K (2020) → $2K (2025)
Louis W. Riethmann III
Co-Trustee
On filings since 2020
2 hrs/week
No compensation reported
Data from IRS Form 990 filings, 2020–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2025 IRS filing
The highest reported compensation on the 2025 filing was $2K, to John D Schaperkotter (Co-Trustee).
Frequently asked questions about Louis W Riethmann Jr Foundation
How much does Louis W Riethmann Jr Foundation give each year?
Louis W Riethmann Jr Foundation gave $111K across 1 grant in 2025, according to its 2025 IRS Form 990 filing. In 2024 it gave $106K across 1 grant.
Where does Louis W Riethmann Jr Foundation operate?
Louis W Riethmann Jr Foundation has awarded grants in Missouri.
What is Louis W Riethmann Jr Foundation's EIN?
Louis W Riethmann Jr Foundation's EIN (Employer Identification Number) is 46-0645591. IRS Form 990 filing data is available on this page for 2020–2025.
Data last updated September 2026. Sourced from IRS Form 990 filings.
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