Louis W Riethmann Jr Foundation
Louis W Riethmann Jr Foundation is a private foundation, based in Clayton, MO. IRS filing data is available from 2020 through 2025. As of 2025, the organization holds $1.6M in total assets. In 2025, it awarded 1 grant totaling $111K. Net investment income was $90K.
Louis W Riethmann Jr Foundation at a glance
In short: Louis W Riethmann Jr Foundation gave $111K across 1 grant in 2025 (avg $111K), mostly in Missouri. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $111,346
- +5.3% vs 2024
- Grants made (2025)
- 1
- +0.0% vs 2024
- Average grant
- $111,346
- +5.3% vs 2024
- Median grant
- $111,346
- Total assets
- $1,563,054
- -1.8% vs 2024
- Primary geography
- Missouri (100% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated October 2026.
Who Louis W Riethmann Jr Foundation funds
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%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of the 2025 grant dollars on its one itemized grant.
States
Cities
How Louis W Riethmann Jr Foundation gives
- Giving held roughly steady from 2022 to 2025 (−2%). Method
- In 2025 it paid out 89% of its IRS minimum distribution (the 5% rule). Foundations have until the end of the next year to meet it. Method
From the foundation's IRS Form 990-PF filings. Methodology.
Giving History
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.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Loyola Academy of St Louis St. Louis, MO | General Operations | $111,346 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Qualifying Distributions | Net Investment Income | Distributable Amount |
|---|---|---|---|---|---|---|---|---|
| 2025 | $1,563,054 | $101,095 | $127,116 | $111,346 | 1 | $114,929 | $89,895 | $128,476 |
| 2024 | $1,591,542 | $91,902 | $120,692 | $105,718 | 1 | $109,106 | $81,380 | $114,734 |
| 2023 | $1,620,442 | $101,837 | $137,147 | $123,636 | 1 | $126,886 | $91,576 | $108,968 |
| 2022 | $1,655,648 | $91,368 | $133,148 | $114,000 | 1 | $117,452 | $80,296 | $127,750 |
| 2021 | $1,697,428 | $191,144 | $116,093 | $102,000 | 1 | — | $181,596 | $117,999 |
| 2020 | $1,622,877 | $-19,619 | $115,957 | $102,000 | 1 | — | $42,123 | $106,358 |
Under IRS private-foundation payout rules, Louis W Riethmann Jr Foundation reported a distributable amount of $128K for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
Louis W Riethmann Jr Foundation's 2025 filing lists 3 officers; 2 of 3 officers listed in 2025 are compensated.
Officers on the 2025 filing
John D. Schaperkotter
Co-Trustee
On filings since 2020
2 hrs/week
$2K (2020) → $2K (2025)
Commerce Trust
Co-Trustee & Tax Preparation
On filings since 2023
2 hrs/week
$9K (2023) → $9K (2025)
Louis W. Riethmann III
Co-Trustee
On filings since 2020
2 hrs/week
No compensation reported
Former officers (1)
- Former: Commerce Trust Company (2020–2022) — Co-Trustee & Tax Preparation
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 $9K, to Commerce Trust (Co-Trustee). 3 officers or directors reported compensation on that filing.
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-PF. In 2024 it gave $106K across 1 grant.
How large is Louis W Riethmann Jr Foundation?
Louis W Riethmann Jr Foundation reported $1.6M in total assets on its 2025 IRS Form 990-PF. It paid out $115K in qualifying distributions that year, against a required minimum of $128K (roughly 5% of its investment assets). Falling short in one year is not a violation: foundations have until the end of the next year to meet the minimum.
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 October 2026. Sourced from IRS Form 990-PF filings.
Data update history
(7)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2020 (received by the IRS July 31, 2020)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS October 27, 2021)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS October 26, 2022)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS October 19, 2023)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS November 5, 2024)
- Updated Form 990-PF for fiscal year 2025 (received by the IRS November 14, 2025)
- IRS filings on file for fiscal years 2020–2025
Live grants for the work Louis W Riethmann Jr Foundation funds
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