Ross and Patty Mc Callister Foundation
Historical FunderTucson, Arizona · EIN 45-2596526 · Private foundation
Half of its grants to organizations were between $5,000 and $15,000.
How to apply
The foundation filed the following application information (Form 990-PF Part XV, tax year 2024):
| Contact | ROSS PATTY MCCALLISTER |
|---|---|
| Address | 2910 N SWAN STE 204, TUCSON AZ 85712 |
| Phone | 5207908100 |
| Form and materials | NO SPECIFIED FORM |
| Deadlines | NONE |
| Restrictions | ORGANIZATIONS QUALIFYING UNDER SECTION 501(C)(3) WHICH PROMOTE EDUCATION, HEALTH AND MEDICAL RESEARCH AND ADVANCEMENT, AND COMMUNITY PROGRAMS. |
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
35% of grants went outside Arizona.
Grants paid in tax year 2024
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| The University of Arizona Foundation | Tucson, AZ | Program support | $100,000 |
| The Catholic University of America - Tucson | Tucson, AZ | Program support | $76,000 |
| Cystic Fibrosis Foundation - Arizona Chapter | Tucson, AZ | Cystic fibrosis research | $50,000 |
| Arizona Center for Autism | Tucson, AZ | Program support | $25,000 |
| Bps Foundation | Las Vegas, NV | Program support | $25,000 |
| Toys for Tots | Triangle, VA | Program support | $20,000 |
| YMCA of Southern Arizona | Tucson, AZ | Program support | $16,000 |
| Minnie's Food Pantry | Plano, TX | Program support | $15,000 |
| Flagstaff Family Food Center | Flagstaff, AZ | Program support | $10,000 |
| Katy Christian Ministries | Katy, TX | Program support | $10,000 |
| San Antonio Food Bank Inc | San Antonio, TX | Program support | $10,000 |
| St Mary's Food Bank | Phoenix, AZ | Program support | $10,000 |
| The Community Food Bank of Southern Az | Tucson, AZ | Program support | $10,000 |
| Three Square | Las Vegas, NV | Program support | $10,000 |
| Tucson Arizona Boys Chorus | Tucson, AZ | Program support | $10,000 |
| United Way of Tucson & Southern Arizona | Tucson, AZ | Program support | $10,000 |
| El Ranchito de Los Ninos Foundation | Los Lunas, NM | Program support | $5,000 |
| Imago Dei Middle School | Tucson, AZ | Program support | $5,000 |
| Make Way for Books | Tucson, AZ | Program support | $5,000 |
| National Multiple Sclerosis Society | New York, NY | Program support | $5,000 |
| Sister Jose Women Center | Tucson, AZ | Program support | $5,000 |
| The Foster Alliance | Phoenix, AZ | Program support | $5,000 |
| Tu Nidito Children and Family Services Inc | Tucson, AZ | Program support | $5,000 |
| Leukemia & Lymphoma Society Inc | Rye Brook, NY | Program support | $4,000 |
| Undue Medical Debts | Long Island City, NY | Program support | $2,000 |
| American Cancer Society - Az | Phoenix, AZ | Program support | $1,000 |
| Arizona-Sonora Desert Museum | Tucson, AZ | Program support | $1,000 |
| Tucson Botanical Gardens | Tucson, AZ | Program support | $1,000 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2024 | $451,000 | 28 |
| 2023 | $518,900 | 32 |
Sources
- IRS Form 990-PF, tax year 2024, filed Jun 3, 2025 - IRS e-file batch, object ID 202521539349101012
- IRS Tax Exempt Organization Search for EIN 45-2596526
- 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.