Trimix Foundation
Trimix Foundation is a private foundation based in Providence, Rhode Island. Its 2024 filing describes grants for programs and activities furthering its exempt purposes, including efforts to improve and expand quality housing in low-income communities and address community deterioration and urban blight in Berkshire County, Massachusetts.
Trimix Foundation at a glance
In short: Trimix Foundation gave $1.1M across 3 grants in 2024 (avg $366K), mostly in Rhode Island. Source: 2024 IRS Form 990-PF.
- Annual giving (2024)
- $1,097,471
- +25.5% vs 2023
- Grants made (2024)
- 3
- -40.0% vs 2023
- Average grant
- $365,824
- +109.1% vs 2023
- Median grant
- $500,000
- Total assets
- $45,244,058
- -0.2% vs 2023
- Primary geography
- Rhode Island (54% of itemized 2024 grant dollars)
- Latest 990 filing
- Form 990-PF, 2024 View filing
Data from IRS Form 990-PF, 2024; updated October 2026.
How to apply to Trimix Foundation
- How to Apply
-
The filing says the foundation does not restrict giving to preselected organizations. It asks applicants to submit written requests on letterhead with information about qualified charitable status and the intended use of the grant. The filing lists Mark Mixer as the contact and states that restrictions on awards are N/A.
- Contact
Application contact: Mark Mixer
Mailing address: C/O Pathstone Family Office 50 Park, Row West No113, Providence, RI 02903
Phone: (401) 383-5370
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who Trimix Foundation funds
How this funder distributes its grants
Top Recipients
Top 3 recipients in 2024
The largest 2024 recipient was Mill Town Private Foundation ($592K). Together the top 3 received $1.1M.
Grant Size Distribution
59 grants across all recorded years
The most common grant size was under $50K: 34 grants of 59 (58%).
Geographic Focus
Where this funder awards grants
The foundation’s 2024 filing describes direct charitable activities related to housing in Berkshire County, Massachusetts. Its 2024 grant dollars went to recipients in Rhode Island (54%) and New York (46%); the filing lists Massachusetts as 0%.
Grant Distribution by State
Share of 2024 grant dollars across all 3 itemized grants.
Cities
How Trimix Foundation gives
- Giving fell 57% from 2021 to 2024. Method
- In 2024 it paid out 142% of its IRS minimum distribution (the 5% rule). Method
From the foundation's IRS Form 990-PF filings. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2020 to 2024, annual grant giving ranged from $875K (2023) to $2.5M (2021). In 2024 it made 3 grants totaling $1.1M.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Mill Town Private Foundation Providence, RI | Program Developement | $592,471 |
| Union College Schenectady, NY | Science and Technology Building | $500,000 |
| Railroad Street Youth Project Great Barrington, MA | Exempt Purpose | $5,000 |
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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 |
|---|---|---|---|---|---|---|---|---|
| 2024 | $45,244,058 | $1,320,452 | $1,481,569 | $1,097,471 | 3 | $1,182,358 | $667,316 | $832,897 |
| 2023 | $45,325,661 | $3,756,006 | $1,482,717 | $874,812 | 5 | $1,213,014 | $1,610,248 | $1,136,567 |
| 2022 | $43,075,822 | $2,733,337 | $2,794,966 | $2,274,798 | 9 | $8,999,327 | $515,228 | $3,323,480 |
| 2021 | $43,016,864 | $1,937,678 | $3,113,339 | $2,529,868 | 17 | $17,504,506 | $1,452,692 | $1,705,166 |
| 2020 | $42,804,814 | $4,324,260 | $2,748,857 | $2,049,550 | 25 | — | $3,894,736 | $1,725,571 |
Under IRS private-foundation payout rules, Trimix Foundation reported a distributable amount of $833K for 2024 — 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 foundation’s filing describes charitable activities focused on housing in low-income communities in Berkshire County. It also reports program-related investment loans to disregarded single-member LLCs of a 501(c)(4) organization for work to improve the quality and quantity of housing in historically economically depressed communities.
One 2024 grantee, Railroad Street Youth Project Inc., describes its mission as empowering young people by creating youth-inspired projects.
Grantmaking
In 2024, the foundation reported three grants totaling $1,097,471. Grants ranged from $5,000 to $592,471, with a median of $500,000. Its largest reported grants were $592,471 to Mill Town Private Foundation for “program developement” and $500,000 to Union College for a science and technology building. Railroad Street Youth Project Inc. received $5,000 for an exempt purpose.
Leadership & Key People
Leadership team and compensation from IRS filings
The 2024 filing lists David P Mixer as director/vice president; Brian Mixer as director; Mark Mixer as director/president; Michael Mixer as director; Matthew A Thibault as secretary; and Arthur X Duffy as director/treasurer.
Trimix Foundation is led by Mark Mixer, Director & President since 2022 (on filings since 2020); none of the 6 officers listed in 2024 report compensation.
Officers on the 2024 filing
Mark Mixer
Director & President
Director → Director & President, 2022
On filings since 2020
1 hr/week
No compensation reported
Arthur X. Duffy
Director & Treasurer
Treasurer → Director & Treasurer, 2023
On filings since 2020
2 hrs/week
No compensation reported
Brian Mixer
Director
On filings since 2020
1 hr/week
No compensation reported
David P. Mixer
Director & Vice President
Vice President → Director & Vice President, 2021
On filings since 2020
1 hr/week
No compensation reported
Michael Mixer
Director
On filings since 2020
1 hr/week
No compensation reported
Matthew A. Thibault
Secretary
On filings since 2020
2 hrs/week
No compensation reported
Former officers (1)
- Former: Gail S. Mixer (2020–2022) — Director & President · Filing note: Ended 052022
Data from IRS Form 990 filings, 2020–2024. "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 Trimix Foundation
How much does Trimix Foundation give each year?
Trimix Foundation gave $1.1M across 3 grants in 2024, according to its 2024 IRS Form 990-PF. In 2023 it gave $875K across 5 grants.
What is Trimix Foundation's typical grant size?
Trimix Foundation's median grant in 2024 was $500,000, and its average grant was $365,824, across 3 grants on its 2024 IRS Form 990-PF.
Where does Trimix Foundation give grants?
Trimix Foundation gives mostly in Rhode Island: 54% of the grant dollars itemized on its 2024 IRS Form 990-PF went to recipients there. The next largest state was New York (46%).
Does Trimix Foundation give general operating support?
Not in 2024: none of the 3 grants with a stated purpose on Trimix Foundation's 2024 IRS Form 990-PF were described as general or operating support.
How large is Trimix Foundation?
Trimix Foundation reported $45.2M in total assets on its 2024 IRS Form 990-PF. It paid out $1.2M in qualifying distributions that year, against a required minimum of $833K (roughly 5% of its investment assets).
What does Trimix Foundation fund?
The foundation’s filing describes charitable activities focused on housing in low-income communities in Berkshire County. See mission & focus areas ↑
How do I apply for a grant from Trimix Foundation?
The filing says the foundation does not restrict giving to preselected organizations. Eligibility and process details are in the grantmaking section of this profile. See how to apply ↑
What is Trimix Foundation's EIN?
Trimix Foundation's EIN (Employer Identification Number) is 05-0494244. IRS Form 990 filing data is available on this page for 2020–2024.
Data last updated October 2026. Sourced from IRS Form 990-PF filings. Research dossier generated September 2026.
Data update history
(1)
When this profile's IRS filing data changed on Grantable
- IRS filings on file for fiscal years 2020–2024
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