Trimix Foundation
At a glance
Key takeaways
- Trimix Foundation, based in Providence, RI, paid out $1,097,471 in its latest filing, and its stated work centres on low-income housing and urban blight, so a housing or neighbourhood project fits most clearly.
- Its grants have also gone to education, neighbourhood development, colleges, youth organisations and charitable foundations, but the filing sets out no broader eligibility criteria, so check the fit before you write.
- About 8 in 10 of its grants to organisations fall between $5,000 and $600,000, with a median of $50,000 and half at $50,000 or less, so a request in the tens of thousands is a sensible starting point; the largest, about $1,400,000 to Mill Town Foundation, is not a guide to an ordinary award.
- The filing states no geographic focus and shows grants mainly in Rhode Island and New York, a pattern in the record rather than a rule about who may apply, and you should apply by written request on letterhead explaining your qualified charitable status and the intended use of the grant.
- The filing gives no deadlines, but 46% of grant dollars in its latest filing went to organisations it had also funded in its two earlier filings, so repeat recipients take a substantial share.
Overview
Trimix Foundation is a US private foundation based in Providence, RI.
What they fund
Profile based on the foundation's IRS Form 990-PF filings (TY2024, TY2023, TY2022) only: no website or other web source for the foundation was found. Every statement is checked against the filings. Sources read on 7 October 2026.
Priority Areas
The foundation describes direct charitable work to improve and expand quality housing for residents in low-income communities and to reverse community deterioration and urban blight in Berkshire County. Its programme-related investments include loans to improve the quality and quantity of housing stock in low-income communities. Its grants also supported programme development and science and technology building projects, alongside education programmes and neighbourhood development. The grant record includes gifts to colleges, youth organisations and charitable foundations. The filings describe these activities but do not set out broader eligibility criteria.
Themes
- Low-income housing
- Urban blight
Geographic Focus
No geographic focus is stated; the filings show grants mainly in Rhode Island and New York.
How to apply
Submit a written request on letterhead providing information about qualified charitable status and the intended use of the grant.
Application success factors
- Repeat giving: In its TY2024 filing, 46% of its grant dollars to organisations went to organisations it had also funded in its TY2022 or TY2023 filing.
- Grant size: Across its TY2022, TY2023 and TY2024 filings, half of its 17 grants to organisations were $50,000 or less.
Where grants go
From grants to organisations in the foundation’s filings for tax years 2022–2024.
Grant dollars by state
- The largest single recipient received 40% of grant dollars to organisations.
- In tax year 2024, 46% of grant dollars went to organisations Trimix Foundation had funded in earlier filings.
- No grants were paid directly to organisations outside the US.
- 55% of grant dollars went to intermediaries that regrant to other organisations.
Grants
The largest grants to organisations in the foundation’s latest filing:
- Mill Town Private Foundation · Program developement$592,4712024 tax year
- Union College · Science and technology building$500,0002024 tax year
- Railroad Street Youth Project · Exempt purpose$5,0002024 tax year
Grants to organisations listed in the foundation’s Form 990-PF filings. Grants to individuals are not shown.
Officers and directors
- Arthur X Duffy — Director / Treasurer
- Matthew A Thibault — Secretary
- Michael Mixer — Director
- Mark Mixer — Director / President
- Brian Mixer — Director
- David P Mixer — Director / Vice President
From the latest Form 990-PF filing
3 years of tax filings
| Year | Total expenses | Grants paid | Assets | Filing document |
|---|---|---|---|---|
| 2022 tax year | $2,794,966 | $2,274,798 | $43,075,822 | Filing for 2022 tax year |
| 2023 tax year | $1,482,717 | $874,812 | $45,325,661 | Filing for 2023 tax year |
| 2024 tax year | $1,481,569 | $1,097,471 | $45,244,058 | Filing for 2024 tax year |
Figures from the foundation’s IRS Form 990-PF filings. Assets are at fair market value at year end. The document icon links to each year’s filing on ProPublica Nonprofit Explorer.
Sources
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At a glance

Applying to Trimix Foundation?
Hinchilla drafts your answers around this funder's priorities, using your organisation's own documents.
No credit card required
Contact
- (401) 383-5370
- Providence, RI

Applying to Trimix Foundation?
Hinchilla drafts your answers around this funder's priorities, using your organisation's own documents.
No credit card required
Contact
- (401) 383-5370
- Providence, RI