The Knowlton Foundation
The Knowlton Foundation is a private foundation, based in Port Huron, MI. IRS filing data is available from 2019 through 2020. In 2020, it awarded 1 grant totaling $3.6M. Net investment income was $29K.
The Knowlton Foundation at a glance
In short: The Knowlton Foundation gave $3.6M across 1 grant in 2020 (avg $3.6M), mostly in Michigan. Source: 2020 IRS Form 990-PF.
- Annual giving (2020)
- $3,649,944
- +12066.5% vs 2019
- Grants made (2020)
- 1
- +0.0% vs 2019
- Average grant
- $3,649,944
- +12066.5% vs 2019
- Median grant
- $3,649,944
- Primary geography
- Michigan (100% of itemized 2020 grant dollars)
- Latest 990 filing
- Form 990-PF, 2020 View filing
Data from IRS Form 990-PF, 2020; updated September 2026.
Who The Knowlton Foundation funds
How this funder distributes its grants
Top Recipients
Top recipient in 2020
The largest 2020 recipient was Community Foundation of St Clair County ($3.6M).
Grant Size Distribution
2 grants across all recorded years
The most common grant size was under $50K: 1 grant of 2 (50%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of the 2020 grant dollars on its one itemized grant.
States
Cities
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2019 to 2020, annual grant giving ranged from $30K (2019) to $3.6M (2020). In 2020 it made 1 grant totaling $3.6M.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Community Foundation of St Clair County Port Huron, MI | To establish a fund to support museums and historical artifacts | $3,649,944 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Net Investment Income |
|---|---|---|---|---|---|---|
| 2020 | — | $110,544 | $3,839,937 | $3,649,944 | 1 | $29,144 |
| 2019 | $3,729,393 | $85,287 | $161,511 | $30,000 | 1 | $29,101 |
Leadership & Key People
Officers and directors from IRS filings
The Knowlton Foundation's 2020 filing lists 3 officers; none of the 3 officers listed in 2020 report compensation.
Officers on the 2020 filing
Charles J. Knowlton
Trustee
On filings since 2019
5 hrs/week
No compensation reported
Judith A. Knowlton
Trustee & Treasurer
On filings since 2019
5 hrs/week
No compensation reported
Suzanne A. Barkhouse
Trustee & Secretary
On filings since 2019
5 hrs/week
No compensation reported
Data from IRS Form 990 filings, 2019–2020. "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 The Knowlton Foundation
How much does The Knowlton Foundation give each year?
The Knowlton Foundation gave $3.6M across 1 grant in 2020, according to its 2020 IRS Form 990-PF. In 2019 it gave $30K across 1 grant.
Where does The Knowlton Foundation operate?
The Knowlton Foundation has awarded grants in Michigan.
What is The Knowlton Foundation's EIN?
The Knowlton Foundation's EIN (Employer Identification Number) is 38-3506105. IRS Form 990 filing data is available on this page for 2019–2020.
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
- Updated Form 990-PF for fiscal year 2019 (received by the IRS May 27, 2020)
- Updated Form 990-PF for fiscal year 2020 (received by the IRS May 7, 2021)
- IRS filings on file for fiscal years 2019–2020
Live grants for the work The Knowlton Foundation funds
Philanthropy, Voluntarism & Grantmaking Open opportunities, soonest deadline first.
Explore Open Grants
Browse active grant opportunities in The Knowlton Foundation's focus areas in our free grants database
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