Mary Lou Diether Trust
Mary Lou Diether Trust is a private foundation focused on Health, based in Eagan, MN. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $2.2M in total assets. In 2025, it awarded 5 grants totaling $77K. Net investment income was $235K.
Mary Lou Diether Trust at a glance
In short: Mary Lou Diether Trust gave $77K across 5 grants in 2025 (avg $15K), mostly in Minnesota. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $77,000
- -8.3% vs 2024
- Grants made (2025)
- 5
- +0.0% vs 2024
- Average grant
- $15,400
- -8.3% vs 2024
- Median grant
- $15,400
- Total assets
- $2,202,187
- +6.9% vs 2024
- Primary geography
- Minnesota (100% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated September 2026.
Who Mary Lou Diether Trust funds
How this funder distributes its grants
Top Recipients
Top 5 recipients in 2025
The largest 2025 recipient was Saint Paul & Minnesota Foundation ($31K). Together the top 5 received $77K.
Grant Size Distribution
25 grants across all recorded years
The most common grant size was under $50K: 24 grants of 25 (96%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 5 itemized grants.
Cities
How Mary Lou Diether Trust gives
- Giving fell 39% from 2022 to 2025. Method
- In 2025 it paid out 79% 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 2019 to 2025, annual grant giving ranged from $77K (2025) to $125K (2022). In 2025 it made 5 grants totaling $77K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Saint Paul & Minnesota Foundation St. Paul, MN | General Operating | $30,800 |
| Unity Church - Unitarian St. Paul, MN | General Operating | $15,400 |
| Children's Hospital Association Saint Paul, MN | General Operating | $15,400 |
| Neighborhood House Association St. Paul, MN | General Operating | $7,700 |
| University of Minnesota Foundation Minneapolis, MN | General Operating | $7,700 |
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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 | $2,202,187 | $266,372 | $124,688 | $77,000 | 5 | $90,208 | $235,322 | $114,386 |
| 2024 | $2,060,881 | $175,265 | $123,813 | $84,000 | 5 | $93,348 | $144,761 | $111,326 |
| 2023 | $2,010,054 | $28,894 | $139,656 | $104,063 | 5 | $112,189 | $23,407 | $104,362 |
| 2022 | $2,120,939 | $-39,657 | $172,112 | $125,231 | 5 | $133,773 | $16,061 | $106,613 |
| 2021 | $2,332,751 | $393,376 | $160,965 | $116,547 | 5 | $128,792 | $359,970 | $125,232 |
| 2020 | $2,112,431 | $41,709 | $151,924 | $113,060 | 8 | — | $12,261 | $116,377 |
| 2019 | $2,210,692 | $107,307 | $144,902 | $102,779 | 5 | — | $78,641 | $111,670 |
Under IRS private-foundation payout rules, Mary Lou Diether Trust reported a distributable amount of $114K for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
Mary Lou Diether Trust's only listed officer is US Bank N A, Trustee on every filing since 2019 (compensated).
Officers on the 2025 filing
US Bank N A
Trustee
On filings since 2019
1 hr/week
$35K (2019) → $37K (2025)
Data from IRS Form 990 filings, 2019–2025. "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 $37K, to US Bank N a (Trustee).
Frequently asked questions about Mary Lou Diether Trust
How much does Mary Lou Diether Trust give each year?
Mary Lou Diether Trust gave $77K across 5 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $84K across 5 grants.
What is Mary Lou Diether Trust's typical grant size?
Mary Lou Diether Trust's median grant in 2025 was $15,400, and its average grant was $15,400, across 5 grants on its 2025 IRS Form 990-PF.
Where does Mary Lou Diether Trust give grants?
Mary Lou Diether Trust gives mostly in Minnesota: 100% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The most frequent recipient cities were St. Paul, MN (4 grants).
Does Mary Lou Diether Trust give general operating support?
Yes: 100% of Mary Lou Diether Trust's 2025 grants with a stated purpose (5 of 5) were for general or operating support, per its 2025 IRS Form 990-PF.
Who are Mary Lou Diether Trust's largest grantees?
Mary Lou Diether Trust's largest 2025 grantees include Saint Paul & Minnesota Foundation ($30,800), Unity Church - Unitarian ($15,400) and Children's Hospital Association ($15,400), according to its 2025 IRS Form 990-PF. Together they received 80% of its itemized 2025 grant dollars.
How large is Mary Lou Diether Trust?
Mary Lou Diether Trust reported $2.2M in total assets on its 2025 IRS Form 990-PF. It paid out $90K in qualifying distributions that year, against a required minimum of $114K (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.
What is Mary Lou Diether Trust?
Mary Lou Diether Trust is a private foundation focused on Health, based in Eagan, MN. It holds $2.2M in total assets as of 2025.
What is Mary Lou Diether Trust's EIN?
Mary Lou Diether Trust's EIN (Employer Identification Number) is 41-6208105. IRS Form 990 filing data is available on this page for 2019–2025.
Data last updated September 2026. Sourced from IRS Form 990-PF filings.
Data update history
(8)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2019 (received by the IRS May 7, 2020)
- Updated Form 990-PF for fiscal year 2020 (received by the IRS May 12, 2021)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS May 10, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS May 8, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS May 5, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS May 9, 2025)
- Added Form 990-PF for fiscal year 2025 (received by the IRS May 7, 2026)
- IRS filings on file for fiscal years 2019–2024
Live grants for the work Mary Lou Diether Trust funds
Health Open opportunities, soonest deadline first.
Explore Open Grants
Browse active grant opportunities in Mary Lou Diether Trust's focus areas in our free grants database
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