Mattis Family Foundation
Historical FunderGreenwich, Connecticut · EIN 20-3538795 · Private foundation
Half of its grants to organizations were between $5,000 and $50,000.
How to apply
The foundation filed the following application information (Form 990-PF Part XV, tax year 2025):
| Contact | PETER D MATTIS |
|---|---|
| Address | 77 ZACCHEUS MEAD LANE, GREENWICH CT 06831 |
| Phone | 6467083013 |
| Form and materials | WRITTEN LETTER |
| Deadlines | NONE |
| Restrictions | NONE |
Copied as filed. Deadlines on a tax return describe the foundation's usual process; they are not confirmation of a current open cycle.
What it funds
Share of grant lines on the latest return, classified from the purpose each grant states.
Where it gives
25% of grants went outside Connecticut.
Grants paid in tax year 2025
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| Greenwich Country Day School | Greenwich, CT | Education | $100,000 |
| Eagle Hill School | Greenwich, CT | Education | $80,000 |
| Kripalu Center for Yoga & Health | Stockbridge, MA | Spiritual development | $50,000 |
| Burning Man Project | San Francisco, CA | Art, music and innovation | $20,000 |
| Greenwich Library | Greenwich, CT | Education & community outreach programs | $10,000 |
| Neighbor to Neighbor | Greenwich, CT | Food bank | $10,000 |
| Bruce Museum | Greenwich, CT | Education, culture, art | $5,000 |
| Greenwich Historical Society | Cos Cob, CT | Education | $5,000 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2025 | $280,000 | 8 |
| 2024 | $215,000 | 10 |
| 2023 | $175,000 | 12 |
Sources
- IRS Form 990-PF, tax year 2025, filed May 15, 2026 - IRS e-file batch, object ID 202631359349103348
- IRS Tax Exempt Organization Search for EIN 20-3538795
- Profile updated Nov 5, 2026
Facts on this page come from the foundation's own IRS Form 990-PF filings as published by the IRS. Grantvello does not know whether a foundation is accepting proposals right now: a past grant is not an open opportunity. Always confirm current guidelines with the funder before applying.