Donald Grant & Ann Martin Calder Foundat
The Donald Grant & Ann Martin Calder Foundation is a private foundation based in Hobe Sound, Florida. Its 2025 filing lists grants to charitable organizations in several states, all designated for general support.
Donald Grant & Ann Martin Calder Foundat at a glance
In short: Donald Grant & Ann Martin Calder Foundat gave $92K across 11 grants in 2025 (avg $8K), top state Maine. 27% of 2025 grantees were new. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $91,700
- -73.4% vs 2024
- Grants made (2025)
- 11
- -67.6% vs 2024
- Average grant
- $8,336
- -17.7% vs 2024
- Median grant
- $2,000
- Total assets
- $1,676,920
- +35.8% vs 2024
- New grantees (estimate)
- 27% first-time grantees (3 of 11, 2025; small sample)
- Primary geography
- Maine (39% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated September 2026. New grantees are estimated by matching recipient names across years (methodology).
How to apply to Donald Grant & Ann Martin Calder Foundat
- 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: 220 South Beach Road, Hobe Sound, FL 33455
Phone: (772) 546-2502
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who Donald Grant & Ann Martin Calder Foundat funds
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2025
The largest 2025 recipient was Atlantic Salmon Foundation ($36K). Together the top 10 received $92K.
Grant Size Distribution
133 grants across all recorded years
The most common grant size was under $50K: 122 grants of 133 (92%).
Geographic Focus
Where this funder awards grants
The 2025 grant dollars were distributed among recipients in Maine (39%), Illinois (28%), Virginia (16%), Florida (12%), and Washington, DC (2%).
Grant Distribution by State
Share of 2025 grant dollars across all 11 itemized grants.
States
Cities
Is Donald Grant & Ann Martin Calder Foundat open to new grantees?
27%
first-time grantees, 2025
In 2025, 3 of 11 grantees (27%) were first-time recipients. With only 11 grantees, that is a small sample: one grantee more or less moves the share by about 9 points. First grants averaged $9K; repeat grants $8K. How we count
Medians: $1K first-time, $4K repeat.
- 64% of 2025 grantees were also funded in 2024. Method
- Giving fell 72% from 2022 to 2025. Method
- In 2025 it paid out 31% 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 $92K (2025) to $491K (2023). In 2025 it made 11 grants totaling $92K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Atlantic Salmon Foundation Calais, ME | General Support | $36,000 |
| Rush University System for Health Chicago, IL | General Support | $25,000 |
| National Sporting Library Middleburg, VA | General Support | $15,000 |
| Jupiter Island Medical Clinic Hobe Sound, FL | General Support | $5,000 |
| Jupiter Island Arts Council Jupiter, FL | General Support | $5,000 |
| Marina Orth Foundation Washington, DC | General Support | $2,000 |
| 1000 Friends of Florida Tallahassee, FL | General Support | $1,000 |
| American University of Paris | General Support | $1,000 |
| Irish Georgian Society Chicago, IL | General Support | $1,000 |
| AFS Intercultural Programs USA New York, NY | General Support | $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 | Distributable Amount |
|---|---|---|---|---|---|---|---|---|
| 2025 | $1,676,920 | $586,991 | $136,989 | $91,700 | 11 | $94,397 | $544,398 | $307,650 |
| 2024 | $1,235,141 | $340,725 | $395,124 | $344,400 | 34 | $346,636 | $292,237 | $320,871 |
| 2023 | $1,291,371 | $194,544 | $558,911 | $491,285 | 26 | $496,242 | $124,472 | $306,610 |
| 2022 | $1,669,998 | $1,216,100 | $388,538 | $331,100 | 31 | $335,049 | $1,162,611 | $260,415 |
| 2021 | $842,436 | $305,553 | $394,778 | $341,130 | 31 | $347,409 | $67,660 | $286,354 |
| 2020 | $1,121,935 | $253,659 | $170,075 | $118,545 | 21 | — | $204,034 | $251,097 |
Under IRS private-foundation payout rules, Donald Grant & Ann Martin Calder Foundat reported a distributable amount of $308K 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
The available information does not state the foundation’s own mission. Its 2025 grants included support for organizations with varied missions. For example, Jupiter Island Medical Clinic says it provides medical services regardless of patients’ ability to pay, while Jupiter Island Arts Council says it works to encourage participation in and appreciation of the arts in Martin County, Florida. The Marina Orth Foundation describes its work as developing education and skills for children and youth from disadvantaged socioeconomic areas in Medellín, Colombia. 1000 Friends of Florida describes its mission as building better communities and saving special places.
Grantmaking
The foundation made 11 grants totaling $91,700 in 2025, compared with 34 grants totaling $344,400 in 2024 and 26 totaling $491,285 in 2023. In 2025, grants ranged from $200 to $36,000, with a median grant of $2,000. All 11 grants listed for that year were for general support.
The largest 2025 grants were $36,000 to Atlantic Salmon Foundation, $25,000 to Rush University System for Health, and $15,000 to National Sporting Library. Other grants included $5,000 each to Jupiter Island Medical Clinic and Jupiter Island Arts Council, and $2,000 to Marina Orth Foundation.
Leadership & Key People
Leadership team and compensation from IRS filings
The 2025 filing lists Donald Grant Calder, Ann Martin Calder, Donald Grant Calder Jr, Cornelia Martin Calder, and Isabella Swift Calder as directors.
Donald Grant & Ann Martin Calder Foundat's 2025 filing lists 5 officers; none of the 5 officers listed in 2025 report compensation.
Officers on the 2025 filing
Ann Martin Calder
Director
On filings since 2020
0.3 hrs/week
No compensation reported
Cornelia Martin Calder
Director
On filings since 2020
0.3 hrs/week
No compensation reported
Donald Grant Calder
Director
On filings since 2020
0.3 hrs/week
No compensation reported
Donald Grant Calder Jr.
Director
On filings since 2020
0.3 hrs/week
No compensation reported
Isabella Swift Calder
Director
On filings since 2020
0.3 hrs/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 Donald Grant & Ann Martin Calder Foundat
How much does Donald Grant & Ann Martin Calder Foundat give each year?
Donald Grant & Ann Martin Calder Foundat gave $92K across 11 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $344K across 34 grants.
What is Donald Grant & Ann Martin Calder Foundat's typical grant size?
Donald Grant & Ann Martin Calder Foundat's median grant in 2025 was $2,000, and its average grant was $8,336, across 11 grants on its 2025 IRS Form 990-PF. Organizations receiving their first grant from Donald Grant & Ann Martin Calder Foundat that year got $9K on average.
Where does Donald Grant & Ann Martin Calder Foundat give grants?
Donald Grant & Ann Martin Calder Foundat's top state is Maine, with 39% of the grant dollars itemized on its 2025 IRS Form 990-PF. The next largest states were Illinois (28%) and Virginia (16%). The most frequent recipient cities were Chicago, IL (2 grants).
Does Donald Grant & Ann Martin Calder Foundat give general operating support?
Yes: 100% of Donald Grant & Ann Martin Calder Foundat's 2025 grants with a stated purpose (11 of 11) were for general or operating support, per its 2025 IRS Form 990-PF.
Who are Donald Grant & Ann Martin Calder Foundat's largest grantees?
Donald Grant & Ann Martin Calder Foundat's largest 2025 grantees include Atlantic Salmon Foundation ($36,000), Rush University System for Health ($25,000) and National Sporting Library ($15,000), according to its 2025 IRS Form 990-PF. Together they received 83% of its itemized 2025 grant dollars.
How large is Donald Grant & Ann Martin Calder Foundat?
Donald Grant & Ann Martin Calder Foundat reported $1.7M in total assets on its 2025 IRS Form 990-PF. It paid out $94K in qualifying distributions that year, against a required minimum of $308K (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 Donald Grant & Ann Martin Calder Foundat fund?
The available information does not state the foundation’s own mission. Its 2025 grants included support for organizations with varied missions. See mission & focus areas ↑
How do I apply for a grant from Donald Grant & Ann Martin Calder Foundat?
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 Donald Grant & Ann Martin Calder Foundat's EIN?
Donald Grant & Ann Martin Calder Foundat's EIN (Employer Identification Number) is 13-3917776. IRS Form 990 filing data is available on this page for 2020–2025.
Does Donald Grant & Ann Martin Calder Foundat accept unsolicited proposals?
No, according to Grantable's research on the foundation's published guidelines. See how to apply ↑
Data last updated September 2026. Sourced from IRS Form 990-PF filings. Research dossier generated September 2026.
Data update history
(6)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2020 (received by the IRS May 4, 2021)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS May 16, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS May 12, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS May 13, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS May 5, 2025)
- Added Form 990-PF for fiscal year 2025 (received by the IRS May 12, 2026)
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Cite this profile
Grantable. (2026). Donald Grant & Ann Martin Calder Foundat funder profile. GrantGraph. Retrieved October 4, 2026, from https://grantable.co/funders/donald-grant-and-ann-martin-calder-foundat-morg_7c744f83cd124f00ac7a6696c1692f86
BibTeX
@misc{grantable_133917776_2026,
author = {{Grantable}},
title = {{Donald Grant \& Ann Martin Calder Foundat funder profile}},
howpublished = {GrantGraph},
year = {2026},
url = {https://grantable.co/funders/donald-grant-and-ann-martin-calder-foundat-morg_7c744f83cd124f00ac7a6696c1692f86},
note = {Accessed 2026-10-04. 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 Donald Grant & Ann Martin Calder Foundat'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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