Louis W Riethmann Jr Foundation

Grantmaker Clayton, MO EIN: 46-0645591

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

1state

Share of the 2025 grant dollars on its one itemized grant.

States

Cities

St. Louis

Giving Over Time

Total grant dollars and number of grants per year

$0$50K$100K$150K1 grant2020 1 grant2021 1 grant2022 1 grant2023 1 grant2024 1 grant2025

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

Loyola Academy of St Louis: $111KLoyola Academy of St Louis$111K

The largest 2025 recipient was Loyola Academy of St Louis ($111K).

Grant Size Distribution

5 grants across all recorded years

<$50K$50–100K5$100–250K$250–500K$500K–1M$1–5M$5M+

The most common grant size was in the $100–250K range: 5 grants of 5 (100%).

Giving History

Grant recipients and amounts by year

RecipientPurposeAmount
Loyola Academy of St Louis St. Louis, MOGeneral Operations$111,346

Data update history

When this profile's IRS filing data changed on Grantable

  1. 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

John D Schaperkotter — Co-Trustee: $2KJohn D SchaperkotterCo-Trustee$2K

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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