William and Mary Ross Foundation Inc
Invitation OnlyTucson, Arizona · EIN 86-0891827 · Private foundation
Grants paid (2024)$775K
Organizations funded15
Typical grant$25,000
Total assets$14.2M
Half of its grants to organizations were between $25,000 and $80,000.
From the return
How to apply
On its return for tax year 2024 the foundation checked the box saying it only makes contributions to preselected charitable organizations and does not accept unsolicited requests for funds.
What it funds
Share of grant lines on the latest return, classified from the purpose each grant states.
Where it gives
20% of grants went outside Arizona.
Grants paid in tax year 2024
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| Calvary Chapel Christian Schools | Tucson, AZ | Program support | $250,000 |
| St John Xxii Catholic School Community | Scottsdale, AZ | Program support | $116,000 |
| Magnolia Project | Imperial Beach, CA | Program support | $80,000 |
| University of Arizona Foundation | Tucson, AZ | Program support | $80,000 |
| Assistance League of Tucson | Tucson, AZ | Program support | $35,420 |
| Tucson Festival of Books | Tucson, AZ | Program support | $35,000 |
| St John South Catholic | North Charleston, SC | Program support | $30,000 |
| Coronado Hospital Foundation | Coronado, CA | Program support | $25,000 |
| Humane Society of Southern Arizona | Tucson, AZ | Program support | $25,000 |
| Salpointe Catholic Education Foundation | Tucson, AZ | Program support | $25,000 |
| Tmc Foundation | Tucson, AZ | Program support | $25,000 |
| Tucson Conquistadores Foundation | Tucson, AZ | Program support | $25,000 |
| Salvation Army | Tucson, AZ | Program support | $15,000 |
| St Augustine Catholic High School | Tucson, AZ | Program support | $5,000 |
| St Thomas the Apostle | Tucson, AZ | Program support | $3,800 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2024 | $775,220 | 15 |
| 2023 | $789,536 | 20 |
Sources
- IRS Form 990-PF, tax year 2024, filed Aug 22, 2025 - IRS e-file batch, object ID 202502349349100325
- IRS Tax Exempt Organization Search for EIN 86-0891827
- 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.