The John P Calamos Foundation
The John P Calamos Foundation is a private foundation based in Naperville, Illinois. Its 2025 filing lists grants to charitable organizations, including the National Hellenic Museum, Greek Orthodox churches, and other organizations.
The John P Calamos Foundation at a glance
In short: The John P Calamos Foundation gave $1000K across 13 grants in 2025 (avg $77K), mostly in Illinois. 38% of 2025 grantees were new. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $999,600
- -92.4% vs 2024
- Grants made (2025)
- 13
- +62.5% vs 2024
- Average grant
- $76,892
- -95.3% vs 2024
- Median grant
- $10,000
- Total assets
- $56,507,546
- +26.0% vs 2024
- New grantees (estimate)
- 38% first-time grantees (5 of 13, 2025; small sample)
- Primary geography
- Illinois (77% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated October 2026. New grantees are estimated by matching recipient names across years (methodology).
How to apply to The John P Calamos Foundation
- Accepts unsolicited proposals
- No
- How to Apply
-
The foundation makes contributions only to preselected charitable organizations and does not accept unsolicited requests for funds.
- Contact
Mailing address: 2020 Calamos Court 200, Naperville, IL 60563-2793
Phone: (630) 245-7260
Website: https://calamos.com
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who The John P Calamos Foundation funds
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2025
The largest 2025 recipient was National Hellenic Museum ($650K). Together the top 10 received $997K.
Grant Size Distribution
53 grants across all recorded years
The most common grant size was under $50K: 33 grants of 53 (62%).
Geographic Focus
Where this funder awards grants
In filing year 2025, 77% of grant dollars went to recipients in Illinois, 18% to recipients in New York, and 5% to recipients in the District of Columbia. The filing also reports shares of 0% for Massachusetts and Michigan.
Grant Distribution by State
Share of 2025 grant dollars across all 13 itemized grants.
Cities
Is The John P Calamos Foundation open to new grantees?
38%
first-time grantees, 2025
In 2025, 5 of 13 grantees (38%) were first-time recipients. With only 13 grantees, that is a small sample: one grantee more or less moves the share by about 8 points. First grants averaged $8K; repeat grants $120K. How we count
Medians: $3K first-time, $50K repeat.
- 31% of 2025 grantees were also funded in 2024. Method
- Giving grew 62% from 2022 to 2025. Method
- In 2025 it paid out 43% of its IRS minimum distribution (the 5% rule). Foundations have until the end of the next year to meet it. Method
Estimate from itemized grant lists in IRS Form 990-PF filings (2020–2025). Recipient names are matched across years, so a renamed or misspelled grantee can look new; grants to individuals are left out. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2020 to 2025, annual grant giving ranged from $175K (2021) to $13.2M (2024). In 2025 it made 13 grants totaling $1000K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| National Hellenic Museum Chicago, IL | To Support the Mission of the Charity | $650,000 |
| Assumption Greek Orthodox Church Homer Glen, IL | To Support the Mission of the Charity | $100,000 |
| St Nicholas Greek Orthodox Church New York, NY | To Support the Mission of the Charity | $100,000 |
| Hellenic Initiative Inc New York, NY | To Support the Mission of the Charity | $50,000 |
| Washington OXI Day Foundation Washington, DC | To Support the Mission of the Charity | $50,000 |
| Loukoumi Make a Difference Foundation Tuckahoe, NY | To Support the Mission of the Charity | $25,000 |
| Gift of Adoption Northbrook, IL | To Support the Mission of the Charity | $10,000 |
| St Iakovos Retreat Center Chicago, IL | To Support the Mission of the Charity | $5,000 |
| Order of St Andrew New York, NY | To Support the Mission of the Charity | $4,000 |
| Hellenic American Academy Lowell, MA | To Support the Mission of the Charity | $2,500 |
Ready to take the next step with The John P Calamos Foundation?
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 | $56,507,546 | $8,211,123 | $1,042,567 | $999,600 | 13 | $1,003,489 | $3,210,321 | $2,322,373 |
| 2024 | $44,851,372 | $14,594,494 | $13,159,457 | $13,154,278 | 8 | $13,158,118 | $1,926,609 | $2,030,259 |
| 2023 | $36,343,979 | $1,036,214 | $1,616,571 | $1,612,000 | 13 | $1,615,515 | $755,279 | $1,628,697 |
| 2022 | $28,753,287 | $5,053,747 | $792,306 | $617,500 | 13 | $711,716 | $47,380 | $1,403,825 |
| 2021 | $40,706,023 | $13,631,819 | $281,389 | $175,000 | 6 | $250,400 | $3,798,338 | $1,596,452 |
| 2020 | $29,634,729 | $1,982,251 | $696,729 | $510,000 | 13 | — | $1,833,039 | $1,194,257 |
Under IRS private-foundation payout rules, The John P Calamos Foundation reported a distributable amount of $2.3M for 2025 — the minimum it must pay out in qualifying distributions.
Research compiled by Grantable AI from public sources. Last updated September 2026.
Mission & Focus Areas
No foundation mission statement is provided. Its 2025 grants included support for organizations with varied missions. The National Hellenic Museum says its educational programs use its exhibitions to encourage experiential learning and offer new ways of thinking about Greek history and culture. The Hellenic Initiative describes itself as a nonpartisan, secular organization undertaking charitable and humanitarian acts and services in Greece, with a commitment to the country’s relief, recovery, and renewal.
Grantmaking
In filing year 2025, the foundation reported 13 grants totaling $999,600. Awards ranged from $100 to $650,000, with a median grant of $10,000. The largest reported awards were $650,000 to the National Hellenic Museum in Chicago, $100,000 to Assumption Greek Orthodox Church in Homer Glen, Illinois, and $100,000 to St Nicholas Greek Orthodox Church in New York. Other reported grants included $50,000 to the Hellenic Initiative and $50,000 to the Washington Oxi Day Foundation. The listed grant purposes were to support each charity’s mission.
Leadership & Key People
Leadership team and compensation from IRS filings
The 2025 filing lists John P Calamos Sr, Mae Calamos, Laura Calamos, James R Adams, and Kenneth S Witkowski as co-trustees.
The John P Calamos Foundation's 2025 filing lists 5 officers; none of the 5 officers listed in 2025 report compensation.
Officers on the 2025 filing
John P. Calamos Sr.
Co-Trustee
On filings since 2020
1 hr/week
No compensation reported
Laura Calamos
Co-Trustee
On filings since 2020
1 hr/week
No compensation reported
Mae Calamos
Co-Trustee
On filings since 2020
1 hr/week
No compensation reported
James R. Adams
Co-Trustee
On filings since 2021
1 hr/week
No compensation reported
Kenneth S. Witkowski
Co-Trustee
On filings since 2021
1 hr/week
No compensation reported
Data from IRS Form 990 filings, 2020–2025. "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 The John P Calamos Foundation
How much does The John P Calamos Foundation give each year?
The John P Calamos Foundation gave $1000K across 13 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $13.2M across 8 grants.
What is The John P Calamos Foundation's typical grant size?
The John P Calamos Foundation's median grant in 2025 was $10,000, and its average grant was $76,892, across 13 grants on its 2025 IRS Form 990-PF. Organizations receiving their first grant from The John P Calamos Foundation that year got $8K on average.
Where does The John P Calamos Foundation give grants?
The John P Calamos Foundation gives mostly in Illinois: 77% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The next largest states were New York (18%) and District of Columbia (5%). The most frequent recipient cities were New York, NY (3 grants), Chicago, IL (2 grants) and Washington, DC (2 grants).
Does The John P Calamos Foundation give general operating support?
Not in 2025: none of the 13 grants with a stated purpose on The John P Calamos Foundation's 2025 IRS Form 990-PF were described as general or operating support. Recurring purposes include "To Support the Mission of the Charity" (13 grants).
Who are The John P Calamos Foundation's largest grantees?
The John P Calamos Foundation's largest 2025 grantees include National Hellenic Museum ($650,000), Assumption Greek Orthodox Church ($100,000) and St Nicholas Greek Orthodox Church ($100,000), according to its 2025 IRS Form 990-PF. Together they received 85% of its itemized 2025 grant dollars.
How large is The John P Calamos Foundation?
The John P Calamos Foundation reported $56.5M in total assets on its 2025 IRS Form 990-PF. It paid out $1.0M in qualifying distributions that year, against a required minimum of $2.3M (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 does The John P Calamos Foundation fund?
No foundation mission statement is provided. Its 2025 grants included support for organizations with varied missions. The National Hellenic Museum says its educational programs use its exhibitions to encourage experiential learning and offer new ways of thinking about Greek history and culture. See mission & focus areas ↑
How do I apply for a grant from The John P Calamos Foundation?
The foundation makes contributions only to preselected charitable organizations and does not accept unsolicited requests for funds. Eligibility and process details are in the grantmaking section of this profile. See how to apply ↑
What is The John P Calamos Foundation's EIN?
The John P Calamos Foundation's EIN (Employer Identification Number) is 20-1383344. IRS Form 990 filing data is available on this page for 2020–2025.
Does The John P Calamos Foundation accept unsolicited proposals?
No, according to Grantable's research on the foundation's published guidelines. See how to apply ↑
Data last updated October 2026. Sourced from IRS Form 990-PF filings. Research dossier generated September 2026.
Data update history
(2)
When this profile's IRS filing data changed on Grantable
- Added Form 990-PF for fiscal year 2025 (received by the IRS May 13, 2026)
- IRS filings on file for fiscal years 2020–2024
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Cite this profile
Grantable. (2026). The John P Calamos Foundation funder profile. GrantGraph. Retrieved October 15, 2026, from https://grantable.co/funders/the-john-p-calamos-foundation-morg_d2e916b4728f47ae9a31b2e65f083654
BibTeX
@misc{grantable_201383344_2026,
author = {{Grantable}},
title = {{The John P Calamos Foundation funder profile}},
howpublished = {GrantGraph},
year = {2026},
url = {https://grantable.co/funders/the-john-p-calamos-foundation-morg_d2e916b4728f47ae9a31b2e65f083654},
note = {Accessed 2026-10-15. Data licensed CC BY 4.0}
}The figures on this page are open data under CC BY 4.0: reuse them with credit to Grantable and a link. Download the data.
Figures come from The John P Calamos Foundation's IRS filings (methodology). AI-written summaries, news items and logos are not covered by the open licence. Spot an error? Email hello@grantable.co.
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