Mack Foundation
Mack Foundation is a private foundation, based in Bainbridge Island, WA. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $1.9M in total assets. In 2025, it awarded 9 grants totaling $314K. Net investment income was $171K.
Mack Foundation at a glance
In short: Mack Foundation gave $314K across 9 grants in 2025 (avg $35K), top state Vermont. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $314,000
- +35.1% vs 2024
- Grants made (2025)
- 9
- +80.0% vs 2024
- Average grant
- $34,889
- -25.0% vs 2024
- Median grant
- $25,000
- Total assets
- $1,875,564
- -7.1% vs 2024
- Primary geography
- Vermont (37% 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 Mack Foundation funds
How this funder distributes its grants
Top Recipients
Top 9 recipients in 2025
The largest 2025 recipient was Norwich University ($115K). Together the top 9 received $314K.
Grant Size Distribution
28 grants across all recorded years
The most common grant size was under $50K: 21 grants of 28 (75%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 9 itemized grants.
States
Cities
How Mack Foundation gives
- Giving grew 685% from 2022 to 2025. Method
- In 2025 it paid out 252% of its IRS minimum distribution (the 5% rule). 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 $38K (2020) to $314K (2025). In 2025 it made 9 grants totaling $314K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Norwich University Northfield, VT | General Support | $115,000 |
| Christian Brothers Foundation New Orleans, LA | General Support | $50,000 |
| Music Center of the Northwest Seattle, WA | General Support | $50,000 |
| One Call for All Bainbridge, WA | General Support | $41,000 |
| RHF Foundation Fayatteville, NC | General Support | $25,000 |
| Helpline House Bainbridge Island, WA | General Support | $10,000 |
| The UCLA Foundation Los Angeles, CA | General Support | $10,000 |
| St Cecilia Parish Bainbridge Island, WA | General Support | $10,000 |
| Seattle Union Mission Kent, WA | General Support | $3,000 |
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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 | $1,875,564 | $180,671 | $323,230 | $314,000 | 9 | $323,230 | $171,441 | $128,465 |
| 2024 | $2,018,123 | $69,005 | $243,322 | $232,500 | 5 | $243,322 | $58,183 | $124,325 |
| 2023 | $2,192,440 | $50,011 | $163,927 | $135,000 | 5 | $163,927 | $30,883 | $116,061 |
| 2022 | $2,306,356 | $703,991 | $62,559 | $40,000 | 3 | $62,559 | $681,432 | $110,213 |
| 2021 | $1,664,924 | $309,173 | $186,745 | $172,000 | 6 | $186,745 | $294,428 | $121,049 |
| 2020 | $1,543,758 | $68,845 | $47,959 | $37,500 | 5 | — | $58,386 | $109,310 |
| 2019 | $1,523,828 | $75,852 | $207,460 | $195,102 | 4 | — | $63,494 | $98,453 |
Under IRS private-foundation payout rules, Mack 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
Mack Foundation is led by Robert Bmack, Trustee on every filing since 2019 — the only officer listed, and uncompensated.
Officers on the 2025 filing
Robert Bmack
Trustee
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 Mack Foundation
How much does Mack Foundation give each year?
Mack Foundation gave $314K across 9 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $233K across 5 grants.
What is Mack Foundation's typical grant size?
Mack Foundation's median grant in 2025 was $25,000, and its average grant was $34,889, across 9 grants on its 2025 IRS Form 990-PF.
Where does Mack Foundation give grants?
Mack Foundation's top state is Vermont, with 37% of the grant dollars itemized on its 2025 IRS Form 990-PF. The next largest states were Washington (36%) and Louisiana (16%). The most frequent recipient cities were Bainbridge Island, WA (2 grants).
Does Mack Foundation give general operating support?
Yes: 100% of Mack Foundation's 2025 grants with a stated purpose (9 of 9) were for general or operating support, per its 2025 IRS Form 990-PF.
Who are Mack Foundation's largest grantees?
Mack Foundation's largest 2025 grantees include Norwich University ($115,000), Christian Brothers Foundation ($50,000) and Music Center of the Northwest ($50,000), according to its 2025 IRS Form 990-PF. Together they received 68% of its itemized 2025 grant dollars.
How large is Mack Foundation?
Mack Foundation reported $1.9M in total assets on its 2025 IRS Form 990-PF. It paid out $323K in qualifying distributions that year, against a required minimum of $128K (roughly 5% of its investment assets).
What is Mack Foundation's EIN?
Mack Foundation's EIN (Employer Identification Number) is 46-1580680. 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 March 27, 2020)
- Updated Form 990-PF for fiscal year 2020 (received by the IRS April 14, 2021)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS March 21, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS March 22, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS April 1, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS March 18, 2025)
- Updated Form 990-PF for fiscal year 2025 (received by the IRS March 27, 2026)
- IRS filings on file for fiscal years 2019–2025
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