Cromwell Harbor Supporting Foundation Inc
Cromwell Harbor Supporting Foundation is a public charity based in Boston, Massachusetts. Formed in 2021, it states that it operates for educational, charitable, and scientific purposes as a supporting organization of the Boston Foundation.
Key facts about Cromwell Harbor Supporting Foundation Inc
In short: Cromwell Harbor Supporting Foundation Inc gave $1.4M across 18 grants in 2025 (avg $79K), top state Massachusetts. 28% of 2025 grantees were new. Source: 2025 IRS Form 990.
- EIN
- 87-3060445
- Latest 990 filing
- Form 990, 2025
- Annual giving (2025)
- $1,426,667
- Grants made (2025)
- 18
- Average grant
- $79,259
- Median grant
- $37,500
- New grantees (estimate)
- 28% first-time grantees (5 of 18, 2025)
- Total assets
- $66,002,435
- Primary geography
- Massachusetts (46% of itemized 2025 grant dollars)
Data from IRS Form 990, 2025; updated September 2026. New grantees are estimated by matching recipient names across years (methodology).
Financial Overview
From 2025 IRS Form 990 · View filing
Total Assets
$66.0M
+47.4% YoY
Annual Giving
$1.4M
-39.5% YoY
Grant Count
18
+12.5% YoY
Avg Grant Size
$79K
-46.2% YoY
Is Cromwell Harbor Supporting Foundation Inc open to new grantees?
28%
first-time grantees, 2025
In 2025, 5 of 18 grantees (28%) were first-time recipients. First grants averaged $44K; repeat grants $93K. How we count
Medians: $50K first-time, $25K repeat.
Estimate from itemized grant lists in IRS Form 990 filings (2022–2025). Recipient names are matched across years, so a renamed or misspelled grantee can look new; grants to individuals are left out. Methodology.
Mission & Focus Areas
The foundation’s stated mission is to operate exclusively for educational, charitable, and scientific purposes under Section 501(c)(3) of the Internal Revenue Code as a Section 509(a)(3) supporting organization of the Boston Foundation.
Its grants include support for organizations with varied missions. For example, College of the Atlantic describes its work as operating a four-year accredited college, a small graduate program, and other summer education programs. North Bennet Street School says it trains students for careers in traditional trades, preserves and advances craft traditions, and promotes appreciation of craftsmanship. Vital CXNS says it partners with communities to advance a more accessible, effective, and equitable health ecosystem. Mount Desert Land and Garden Preserve describes its mission as conserving and sharing the beauty of its historic lands and gardens.
Grantmaking
In 2025, the foundation reported 18 grants totaling $1,426,667. Grants ranged from $10,000 to $420,000, with a median grant of $37,500.
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Geographic Focus
Where this funder awards grants
The foundation’s 2025 grant dollars went to recipients in Massachusetts (46%), Maine (37%), New York (9%), Alaska (4%), and Illinois (4%).
Grant Distribution by State
Share of 2025 grant dollars across all 18 itemized grants.
Cities
Giving Over Time
Total grant dollars and number of grants per year
From 2022 to 2025, annual grant giving ranged from $360K (2022) to $2.4M (2024). In 2025 it made 18 grants totaling $1.4M.
Grant Insights
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2025
The largest 2025 recipient was College of the Atlantic ($420K). Together the top 10 received $1.3M.
Grant Size Distribution
52 grants across all recorded years
The most common grant size was under $50K: 31 grants of 52 (60%).
Giving History
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| College of the Atlantic Bar Harbor, ME | General Support | $420,000 |
| Massachusetts General Hospital Boston, MA | Special Project | $200,000 |
| Vital CXNS Inc West Roxbury, MA | General Support | $176,667 |
| North Bennet Street School Boston, MA | General Support | $125,000 |
| Author's Guild Foundation New York City, NY | General Support | $100,000 |
| Lawrence Catholic Academy Lawrence, MA | General Support | $100,000 |
| Jesup Memorial Library Bar Harbor, ME | General Support | $50,000 |
| Outer Coast Sitka, AK | General Support | $50,000 |
| Pickles Group Inc Winnetka, IL | General Support | $50,000 |
| Children's Tumor Foundation New York City, NY | General Support | $25,000 |
Financial History
Multi-year comparison from IRS filings
| Filing year | Assets | Revenue | Expenses | Grants |
|---|---|---|---|---|
| 2025 | $66,002,435 | $7,597,711 | $1,713,492 | $1,426,667 |
| 2024 | $44,770,130 | $4,989,841 | $2,444,857 | $2,358,667 |
| 2023 | $42,497,529 | $19,072,513 | $393,866 | $366,667 |
| Metric | 2025 | 2024 | 2023 |
|---|---|---|---|
| Total Assets | $66,002,435 | $44,770,130 | $42,497,529 |
| Revenue | $7,597,711 | $4,989,841 | $19,072,513 |
| Expenses | $1,713,492 | $2,444,857 | $393,866 |
| Net Investment Income | $3,173,439 | $473,958 | $2,812,452 |
Data update history
When this profile's IRS filing data changed on Grantable
- Updated Form 990 for fiscal year 2022 (received by the IRS May 15, 2023)
- Updated Form 990 for fiscal year 2023 (received by the IRS May 15, 2024)
- Updated Form 990 for fiscal year 2024 (received by the IRS March 13, 2025)
- Added Form 990 for fiscal year 2025 (received by the IRS May 15, 2026)
Leadership & Key People
Leadership team and compensation from IRS filings
The 2025 filing lists William N. Thorndike Jr. as president, treasurer, and CIO; Geneva S. Thorndike as clerk; and M. Lee Pelton, Thomas Bird, and Charles Cheever as directors.
Cromwell Harbor Supporting Foundation Inc is led by William N. Thorndike Jr., President, Treasurer & CIO since 2024 (on filings since 2022); none of the 5 officers listed in 2025 report compensation.
Officers on the 2025 filing
William N. Thorndike Jr.
President, Treasurer & CIO
President, Treasurer & CIO → President, Treasurer & C, 2023
President, Treasurer & C → President, Treasurer & CIO, 2024
On filings since 2022
1 hr/week
No compensation reported
Charles Cheever
Director
On filings since 2022
1 hr/week
No compensation reported
M. Lee Pelton
Director
On filings since 2022
1 hr/week
No compensation reported
Thomas Bird
Director
On filings since 2022
1 hr/week
No compensation reported
Geneva S. Thorndike
Clerk
On filings since 2022
1 hr/week
No compensation reported
Data from IRS Form 990 filings, 2022–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Contact
Mailing address: Co Choate 2 International Place, Boston, MA 02110
Phone: (617) 248-5000
Frequently asked questions about Cromwell Harbor Supporting Foundation Inc
How much does Cromwell Harbor Supporting Foundation Inc give each year?
Cromwell Harbor Supporting Foundation Inc gave $1.4M across 18 grants in 2025, according to its 2025 IRS Form 990. In 2024 it gave $2.4M across 16 grants.
What is Cromwell Harbor Supporting Foundation Inc's typical grant size?
Cromwell Harbor Supporting Foundation Inc's median grant in 2025 was $37,500, and its average grant was $79,259, across 18 grants on its 2025 IRS Form 990. Organizations receiving their first grant from Cromwell Harbor Supporting Foundation Inc that year got $44K on average.
Where does Cromwell Harbor Supporting Foundation Inc give grants?
Cromwell Harbor Supporting Foundation Inc's top state is Massachusetts, with 46% of the grant dollars itemized on its 2025 IRS Form 990. The next largest states were Maine (37%) and New York (9%). The most frequent recipient cities were Bar Harbor, ME (4 grants), Boston, MA (4 grants) and New York City, NY (2 grants).
Does Cromwell Harbor Supporting Foundation Inc give general operating support?
Yes: 83% of Cromwell Harbor Supporting Foundation Inc's 2025 grants with a stated purpose (15 of 18) were for general or operating support, per its 2025 IRS Form 990. Recurring purposes include "Special Project" (3 grants).
Who are Cromwell Harbor Supporting Foundation Inc's largest grantees?
Cromwell Harbor Supporting Foundation Inc's largest 2025 grantees include College of the Atlantic ($420,000), Massachusetts General Hospital ($200,000) and Vital CXNS Inc ($176,667), according to its 2025 IRS Form 990. Together they received 56% of its itemized 2025 grant dollars.
How large is Cromwell Harbor Supporting Foundation Inc?
Cromwell Harbor Supporting Foundation Inc reported $66.0M in total assets on its 2025 IRS Form 990. Its revenue that year was $7.6M.
What does Cromwell Harbor Supporting Foundation Inc fund?
The foundation’s stated mission is to operate exclusively for educational, charitable, and scientific purposes under Section 501(c)(3) of the Internal Revenue Code as a Section 509(a)(3) supporting organization of the Boston Foundation. See mission & focus areas ↑
How do I apply for a grant from Cromwell Harbor Supporting Foundation Inc?
Cromwell Harbor Supporting Foundation Inc has no public application process in the sources Grantable reviewed. Contact the foundation directly before submitting a request.
What is Cromwell Harbor Supporting Foundation Inc's EIN?
Cromwell Harbor Supporting Foundation Inc's EIN (Employer Identification Number) is 87-3060445. IRS Form 990 filing data is available on this page for 2022–2025.
Data last updated September 2026. Sourced from IRS Form 990 filings. Research dossier generated September 2026.
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