Corundum Foundation
Corundum Foundation is a private foundation, based in Colorado Springs, CO. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $14K in total assets. In 2025, it awarded 4 grants totaling $24K. Net investment income was $227.
Corundum Foundation at a glance
In short: Corundum Foundation gave $24K across 4 grants in 2025 (avg $6K), mostly in Colorado. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $23,500
- -48.9% vs 2024
- Grants made (2025)
- 4
- -33.3% vs 2024
- Average grant
- $5,875
- -23.4% vs 2024
- Median grant
- $6,250
- Total assets
- $13,986
- -49.3% vs 2024
- Primary geography
- Colorado (57% 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 Corundum Foundation funds
How this funder distributes its grants
Top Recipients
Top 4 recipients in 2025
The largest 2025 recipient was Children's Hospital Colorado ($10K). Together the top 4 received $24K.
Grant Size Distribution
17 grants across all recorded years
The most common grant size was under $50K: 14 grants of 17 (82%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 4 itemized grants.
Cities
How Corundum Foundation gives
- Giving fell 90% from 2022 to 2025. Method
- In 2025 it paid out well above 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 $5K (2023) to $240K (2022). In 2025 it made 4 grants totaling $24K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Children's Hospital Colorado Colorado Springs, CO | To Provide Support for Operating Costs. | $10,000 |
| Starability Foundation Naples, FL | To Provide Support for Operating Costs. | $10,000 |
| St Paul Catholic Church Colorado Springs, CO | To Provide Support for Operating Costs. | $2,500 |
| University of Colorado Denver, CO | To Provide Support for Operating Costs. | $1,000 |
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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 | $13,986 | $11,227 | $24,820 | $23,500 | 4 | $24,820 | $227 | $923 |
| 2024 | $27,579 | $2,845 | $47,175 | $46,000 | 6 | $47,175 | $1,845 | $7,393 |
| 2023 | $66,909 | $1,164 | $6,100 | $5,000 | 1 | $6,100 | $1,164 | $3,529 |
| 2022 | $71,845 | $300,068 | $241,321 | $240,000 | 4 | $241,321 | $68 | $765 |
| 2021 | $13,098 | $85,002 | $76,200 | $75,000 | 2 | $76,200 | $2 | $699 |
| 2020 | $13,000 | $27,000 | $36,199 | $35,000 | 2 | — | — | $664 |
| 2019 | $13,495 | $1,271 | $38,504 | $37,300 | 4 | — | $171 | $709 |
Under IRS private-foundation payout rules, Corundum Foundation reported a distributable amount of $923 for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
Corundum Foundation is led by Ronald S. Johnson, President & Secretary on every filing since 2019; none of the 3 officers listed in 2025 report compensation.
Officers on the 2025 filing
Ronald S. Johnson
President & Secretary
On filings since 2019
No compensation reported
Lindsay M. Johnson
Director
On filings since 2019
No compensation reported
Susan D. Johnson
Treasurer & Director
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 Corundum Foundation
How much does Corundum Foundation give each year?
Corundum Foundation gave $24K across 4 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $46K across 6 grants.
What is Corundum Foundation's typical grant size?
Corundum Foundation's median grant in 2025 was $6,250, and its average grant was $5,875, across 4 grants on its 2025 IRS Form 990-PF.
Where does Corundum Foundation give grants?
Corundum Foundation gives mostly in Colorado: 57% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The next largest state was Florida (43%). The most frequent recipient cities were Colorado Springs, CO (2 grants).
Does Corundum Foundation give general operating support?
Yes: 100% of Corundum Foundation's 2025 grants with a stated purpose (4 of 4) were for general or operating support, per its 2025 IRS Form 990-PF.
How large is Corundum Foundation?
Corundum Foundation reported $14K in total assets on its 2025 IRS Form 990-PF. It paid out $25K in qualifying distributions that year, against a required minimum of $923 (roughly 5% of its investment assets).
What is Corundum Foundation's EIN?
Corundum Foundation's EIN (Employer Identification Number) is 26-2111278. 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 August 27, 2020)
- Added Form 990-PF for fiscal year 2025 (received by the IRS July 29, 2026)
- IRS filings on file for fiscal years 2020–2024
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Browse active grant opportunities in Corundum Foundation's focus areas in our free grants database
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