Les and Betty Mack Family
Les and Betty Mack Family is a private foundation, based in Lancaster, WI. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $380K in total assets. In 2025, it awarded 3 grants totaling $18K. Net investment income was $14.
Les and Betty Mack Family at a glance
In short: Les and Betty Mack Family gave $18K across 3 grants in 2025 (avg $6K), mostly in Wisconsin. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $18,000
- -14.4% vs 2024
- Grants made (2025)
- 3
- +50.0% vs 2024
- Average grant
- $6,000
- -42.9% vs 2024
- Median grant
- $1,500
- Total assets
- $379,842
- +8.1% vs 2024
- Primary geography
- Wisconsin (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 Les and Betty Mack Family funds
How this funder distributes its grants
Top Recipients
Top 3 recipients in 2025
The largest 2025 recipient was The Varsity Collective ($15K). Together the top 3 received $18K.
Grant Size Distribution
11 grants across all recorded years
The most common grant size was under $50K: 11 grants of 11 (100%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 3 itemized grants.
Cities
How Les and Betty Mack Family gives
- Giving held roughly steady from 2022 to 2025 (+11%). 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 $2K (2020) to $21K (2024). In 2025 it made 3 grants totaling $18K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| The Varsity Collective Madison, WI | 501(C)3 | $15,000 |
| Uw Foundation Madison, WI | 501(C) 3 | $1,500 |
| St Clement Sclool Lancaster, WI | 501(C) 3 | $1,500 |
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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 |
|---|---|---|---|---|---|---|---|
| 2025 | $379,842 | $47,326 | $18,717 | $18,000 | 3 | $18,000 | $14 |
| 2024 | $351,233 | $28 | $25,078 | $21,019 | 2 | $21,520 | $76 |
| 2023 | $376,283 | $635 | $25,640 | $16,211 | 1 | $24,961 | $635 |
| 2022 | $401,288 | $20,001 | $16,835 | $16,200 | 3 | $16,200 | $1,009 |
| 2021 | $398,122 | $266,449 | $7,655 | $7,250 | 2 | $7,250 | $3,841 |
| 2020 | $139,328 | $96,085 | $4,760 | $2,050 | 2 | — | $1,085 |
| 2019 | $48,003 | $48,003 | — | — | — | — | $3 |
Leadership & Key People
Officers and directors from IRS filings
Les and Betty Mack Family is led by Leslie A. Mack, President on every filing since 2019; none of the 4 officers listed in 2025 report compensation.
Officers on the 2025 filing
Leslie A. Mack
President
On filings since 2019
No compensation reported
Betty A. Mack
Secretary
On filings since 2019
No compensation reported
Richard J. Mack
Vice President
On filings since 2019
No compensation reported
Steven J. Mack
Treasurer
On filings since 2019
No compensation reported
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.
Frequently asked questions about Les and Betty Mack Family
How much does Les and Betty Mack Family give each year?
Les and Betty Mack Family gave $18K across 3 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $21K across 2 grants.
What is Les and Betty Mack Family's typical grant size?
Les and Betty Mack Family's median grant in 2025 was $1,500, and its average grant was $6,000, across 3 grants on its 2025 IRS Form 990-PF.
Where does Les and Betty Mack Family give grants?
Les and Betty Mack Family gives mostly in Wisconsin: 100% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The most frequent recipient cities were Madison, WI (2 grants).
Does Les and Betty Mack Family give general operating support?
Not in 2025: none of the 3 grants with a stated purpose on Les and Betty Mack Family's 2025 IRS Form 990-PF were described as general or operating support. Recurring purposes include "501(C) 3" (3 grants).
How large is Les and Betty Mack Family?
Les and Betty Mack Family reported $380K in total assets on its 2025 IRS Form 990-PF. Its revenue that year was $47K.
What is Les and Betty Mack Family's EIN?
Les and Betty Mack Family's EIN (Employer Identification Number) is 84-3245372. 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
(3)
When this profile's IRS filing data changed on Grantable
- Added Form 990-PF for fiscal year 2019 (received by the IRS July 16, 2020)
- Added Form 990-PF for fiscal year 2025 (received by the IRS May 14, 2026)
- IRS filings on file for fiscal years 2020–2024
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