Trimix Foundation is a private family foundation established in 1997 and based in Providence, Rhode Island. The foundation is managed by Rex Capital Advisors and operates as an independent grantmaking organization focused on philanthropic activities in the New England region.
Financial Overview
From 2024 IRS Form 990-PF · View filing
Total Assets
$45.2M
-0.2% YoY
Annual Giving
$1.1M
+25.5% YoY
Grant Count
3
-40.0% YoY
Avg Grant Size
$366K
+109.1% YoY
Mission & Focus Areas
The foundation supports programs and initiatives designed to:
- Improve the lives of children
- Build cohesive neighborhoods and communities
- Improve animal welfare
- Limited support for the arts
The foundation also has a stated commitment to efforts that improve and expand quality housing for residents in low-income communities and reverse community deterioration and urban blight, particularly in Berkshire County, Massachusetts.
Grantmaking
The foundation invites letters of intent (LOIs) from prospective grantees. The foundation does not maintain a website or provide extensive guidance beyond what is available in its IRS filings, so applicants should write to introduce their work.
Grant Range
$50,000
How to Apply
**
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Geographic Focus
Where this funder awards grants
The foundation primarily funds organizations in:
- Rhode Island
- Massachusetts
- New York
- The Northeast region, with particular emphasis on Berkshire County, Massachusetts
Grant Distribution by State
Cities
Financial History
Multi-year comparison from IRS filings
Assets & Giving (2023 Tax Year):
- Total assets: $45,244,058
- Total distributions: $1.2 million
- Total contributions: $1.7 million
- Total giving (2024): $1,097,471
| Metric | 2024 | 2023 | 2022 |
|---|---|---|---|
| Total Assets | $45,244,058 | $45,325,661 | $43,075,822 |
| Revenue | $1,320,452 | $3,756,006 | $2,733,337 |
| Expenses | $1,481,569 | $1,482,717 | $2,794,966 |
| Qualifying Distributions | $1,182,358 | $1,213,014 | $8,999,327 |
| Net Investment Income | $667,316 | $1,610,248 | $515,228 |
| Distributable Amount | $832,897 | $1,136,567 | $3,323,480 |
Giving Over Time
Total grant dollars and number of grants per year
Grant Insights
How this funder distributes its grants
Top Recipients
Top 3 recipients in 2024
Grant Size Distribution
59 grants across all recorded years
Giving History
Grant recipients and amounts by year
No grants recorded for .
Leadership & Key People
Leadership team and compensation from IRS filings
Board & Officers:
- Mark Mixer – President
- David P. Mixer – Vice President/Director
- Brian Mixer – Director
- Michael J. Mixer – Director
- Arthur X. Duffy – Treasurer/Director
- Matthew A. Thibault – Secretary
The foundation is associated with David Mixer, who has served as a managing partner at Point Judith Capital and managing director at Middleland Capital, and is Vice President of the Board of Mill Town Foundation.
Compensation Overview
From 2024 IRS filing
From 2024 filing
| Name | Title | Hours | Compensation |
|---|---|---|---|
| DAVID P MIXER | DIRECTOR/VICE PRESIDENT | 1 | — |
| BRIAN MIXER | DIRECTOR | 1 | — |
| MARK MIXER | DIRECTOR/PRESIDENT | 1 | — |
| MICHAEL MIXER | DIRECTOR | 1 | — |
| MATTHEW A THIBAULT | SECRETARY | 2 | — |
| ARTHUR X DUFFY | DIRECTOR/TREASURER | 2 | — |
Contact Information
Address: 50 Park Row West, Suite 113 Providence, RI 02903
Phone: 401-383-5370
Subject Areas
Focus areas based on grantmaking activity
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Data last updated April 2026. Sourced from IRS Form 990-PF filings. Research dossier generated April 2026.
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