Third Street Foundation
Third Street Foundation is a private foundation based in Portsmouth, New Hampshire. In its 2025 filing, it reported giving $124,000 through 30 grants to charitable organizations, including organizations working in food access, education, health, and other areas.
Third Street Foundation at a glance
In short: Third Street Foundation gave $124K across 30 grants in 2025 (avg $4K), mostly in Massachusetts. 33% of 2025 grantees were new. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $124,000
- -16.8% vs 2024
- Grants made (2025)
- 30
- +42.9% vs 2024
- Average grant
- $4,133
- -41.7% vs 2024
- Median grant
- $3,000
- Total assets
- $1,340,628
- -5.8% vs 2024
- New grantees (estimate)
- 33% first-time grantees (10 of 30, 2025)
- Primary geography
- Massachusetts (52% 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 Third Street Foundation
- Accepts unsolicited proposals
- No
- How to Apply
-
The foundation states that it makes contributions only to preselected charitable organizations and does not accept unsolicited requests for funds.
- Contact
Mailing address: 100 Market Street Suite 302, Portsmouth, NH 03801
Phone: (800) 962-6876
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who Third Street Foundation funds
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2025
The largest 2025 recipient was St Paul's School ($16K). Together the top 10 received $83K.
Grant Size Distribution
116 grants across all recorded years
The most common grant size was under $50K: 114 grants of 116 (98%).
Geographic Focus
Where this funder awards grants
In 2025, grant dollars were reported as distributed among recipients in Massachusetts (52%), New York (15%), NE (14%), the District of Columbia (6%), and Alabama (4%).
Grant Distribution by State
Share of 2025 grant dollars across all 30 itemized grants.
States
Cities
Is Third Street Foundation open to new grantees?
33%
first-time grantees, 2025
In 2025, 10 of 30 grantees (33%) were first-time recipients. First grants averaged $3K; repeat grants $5K. How we count
Medians: $1K first-time, $4K repeat.
- 63% of 2025 grantees were also funded in 2024. Method
- Giving grew 57% from 2022 to 2025. Method
- In 2025 it paid out 184% of its IRS minimum distribution (the 5% rule). 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 $64K (2020) to $149K (2024). In 2025 it made 30 grants totaling $124K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| St Paul's School Concord, MA | General Support | $16,000 |
| Boston Area Gleaners Acton, MA | General Support | $11,500 |
| Harvard College Cambridge, MA | Harvard College and Harvard Graduate School of Education | $11,000 |
| Corning Museum of Glass Corning, NY | General Support | $10,000 |
| Waterfront Alliance New York, NE | General Support | $10,000 |
| Open Table Concord, MA | General Support | $6,500 |
| Christ Episcopal Church Corning, NE | General Support | $5,000 |
| Groton Hill Music Center Groton, MA | General Support | $5,000 |
| Doctors Without Borders Hagerstown, MD | General Support | $4,000 |
| Equal Justice Initiative Montgomery, AL | General Support | $4,000 |
Ready to take the next step with Third Street 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 | $1,340,628 | $57,244 | $139,230 | $124,000 | 30 | $124,000 | $41,396 | $67,357 |
| 2024 | $1,422,614 | $112,939 | $165,812 | $149,000 | 21 | $149,000 | $53,597 | $70,825 |
| 2023 | $1,475,487 | $1,414,580 | $144,911 | $135,000 | 21 | $135,000 | $50,181 | $63,439 |
| 2022 | $205,818 | $82,776 | $81,225 | $79,000 | 22 | $79,000 | $601 | $11,438 |
| 2021 | $204,267 | $80,021 | $78,204 | $76,200 | 22 | $76,200 | — | — |
| 2020 | $202,450 | $80,563 | $65,759 | $63,500 | 11 | — | — | $10,972 |
Under IRS private-foundation payout rules, Third Street Foundation reported a distributable amount of $67K 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 mission statement for the foundation is provided. Its 2025 grants included support for organizations whose own missions include increasing access to fresh food and reducing food waste (Boston Area Gleaners), addressing local hunger (Open Table), and providing meals during humanitarian, climate, and community crises (World Central Kitchen). Other 2025 recipients included organizations working on reproductive health care, homelessness, housing, and LGBTQ+ equality.
Grantmaking
In 2025, the foundation made 30 grants totaling $124,000. Grants ranged from $1,000 to $16,000, with a median grant of $3,000.
Notable 2025 grants included $16,000 to St. Paul’s School for general support; $11,500 to Boston Area Gleaners for general support; $11,000 to Harvard College for Harvard College and Harvard Graduate School of Education; and $10,000 each to Corning Museum of Glass and Waterfront Alliance for general support. Other recipients included Open Table ($6,500), Doctors Without Borders ($4,000), Equal Justice Initiative ($4,000), Planned Parenthood Federation of America ($4,000), World Central Kitchen ($4,000), Pine Street Inn ($3,000), Habitat for Humanity International ($2,000), Human Rights Campaign Foundation ($2,000), and Household Goods ($2,000).
Leadership & Key People
Leadership team and compensation from IRS filings
The 2025 filing lists K Quincy Houghton as Treasurer, Sarah Houghton as Secretary, Robert W Houghton as President, and Amory Houghton III as Vice President.
Third Street Foundation is led by Robert W. Houghton, President on every filing since 2020; none of the 4 officers listed in 2025 report compensation.
Officers on the 2025 filing
Robert W. Houghton
President
On filings since 2020
0.5 hrs/week
No compensation reported
Amory Houghton III
Vice President
On filings since 2020
0.3 hrs/week
No compensation reported
K. Quincy Houghton
Treasurer
On filings since 2020
0.3 hrs/week
No compensation reported
Sarah Houghton
Secretary
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 Third Street Foundation
How much does Third Street Foundation give each year?
Third Street Foundation gave $124K across 30 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $149K across 21 grants.
What is Third Street Foundation's typical grant size?
Third Street Foundation's median grant in 2025 was $3,000, and its average grant was $4,133, across 30 grants on its 2025 IRS Form 990-PF. Organizations receiving their first grant from Third Street Foundation that year got $3K on average.
Where does Third Street Foundation give grants?
Third Street Foundation gives mostly in Massachusetts: 52% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The next largest states were New York (15%) and Nebraska (14%). The most frequent recipient cities were Boston, MA (4 grants), Acton, MA (3 grants), Washington, DC (3 grants) and Concord, MA (2 grants).
Does Third Street Foundation give general operating support?
Yes: 97% of Third Street Foundation's 2025 grants with a stated purpose (29 of 30) were for general or operating support, per its 2025 IRS Form 990-PF.
Who are Third Street Foundation's largest grantees?
Third Street Foundation's largest 2025 grantees include St Paul's School ($16,000), Boston Area Gleaners ($11,500) and Harvard College ($11,000), according to its 2025 IRS Form 990-PF. Together they received 31% of its itemized 2025 grant dollars.
How large is Third Street Foundation?
Third Street Foundation reported $1.3M in total assets on its 2025 IRS Form 990-PF. It paid out $124K in qualifying distributions that year, against a required minimum of $67K (roughly 5% of its investment assets).
What does Third Street Foundation fund?
No mission statement for the foundation is provided. See mission & focus areas ↑
How do I apply for a grant from Third Street Foundation?
The foundation states that it 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 Third Street Foundation's EIN?
Third Street Foundation's EIN (Employer Identification Number) is 26-2535107. IRS Form 990 filing data is available on this page for 2020–2025.
Does Third Street 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 August 6, 2026)
- IRS filings on file for fiscal years 2020–2024
Explore Open Grants
Browse active grant opportunities in Third Street Foundation's focus areas in our free grants database
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Cite this profile
Grantable. (2026). Third Street Foundation funder profile. GrantGraph. Retrieved October 14, 2026, from https://grantable.co/funders/third-street-foundation-morg_aefcc6e8ad234467b85939fe0345f30b
BibTeX
@misc{grantable_262535107_2026,
author = {{Grantable}},
title = {{Third Street Foundation funder profile}},
howpublished = {GrantGraph},
year = {2026},
url = {https://grantable.co/funders/third-street-foundation-morg_aefcc6e8ad234467b85939fe0345f30b},
note = {Accessed 2026-10-14. 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 Third Street 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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