· Private foundation
William and Mary Ross Foundation
Its FY2024 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2020–2024.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2024
- Under $10k2 grants · $9k
- $10k–50k9 grants · $240k
- $50k–250k3 grants · $276k
- $250k+1 grant · $250k
| Recipient | Amount |
|---|---|
| CALVARY CHAPEL CHRISTIAN SCHOOLS | $250,000 |
| ST JOHN XXII CATHOLIC SCHOOL COMMUNITY | $116,000 |
| UNIVERSITY OF ARIZONA FOUNDATION | $80,000 |
| MAGNOLIA PROJECT | $80,000 |
| ASSISTANCE LEAGUE OF TUCSON | $35,420 |
| TUCSON FESTIVAL OF BOOKS | $35,000 |
| ST JOHN SOUTH CATHOLIC | $30,000 |
| TUCSON CONQUISTADORES FOUNDATION | $25,000 |
| CORONADO HOSPITAL FOUNDATION | $25,000 |
| TMC FOUNDATION | $25,000 |
| HUMANE SOCIETY OF SOUTHERN ARIZONA | $25,000 |
| SALPOINTE CATHOLIC EDUCATION FOUNDATION | $25,000 |
| SALVATION ARMY | $15,000 |
| ST AUGUSTINE CATHOLIC HIGH SCHOOL | $5,000 |
| ST THOMAS THE APOSTLE | $3,800 |
Do your dollars go where the need is?
Each grant placed by the hardship in its grantee’s ZIP, then read against the area’s typical level.
Your human-services grants (FY20–24, $140k) land where the poverty rate runs at 15%, against an area that typically sits at 10%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-need ZIPs.
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty linein the grantee’s ZIP, averaged from the tracts in that ZIP; grantee ZIP can differ from where services are delivered.
Which US states your grants reach
US grants placed by each grantee’s ZIP, which can differ from where services are actually delivered. Need from public data — U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA — shown as context about the area, never attributed to your giving.
Who you back again
Which organizations you funded more than once, and which you funded a single time. Each grantee is matched to its own filings.
And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +28% since the first grant, against +27% for the ones you funded once.
29 repeat relationships — 10 still active in FY2024, 19 since wound down; 5 grantees were first funded in FY2024 (too recent to call).
How the two cohorts compare
Organizations
Total granted
Median revenue growth · since first grant
Still filing today
New vs renewed · share of each year
In FY2024, 77% of grant dollars renewed an existing relationship; $175k went to new ones.
Where new relationships form · theme of each grantee’s first grant
First-time = a grantee’s first year in your filing window; renewed = funded in an earlier year too. As a portfolio matures the renewed share naturally climbs — once funded, an org stays “renewable” — so the signal is the years that buck it (a new-grantee intake wave). The earliest year is left-censored: relationships that predate the data read as “new.” Theme is the grantee’s IRS cause.
Backed again, and grew
University of Arizona Foundation5× · 2020–2024 · $495k · revenue +54%- CRCRISTO REY NETWORK3× · 2020–2022 · $137k · revenue +66%
- TFTUCSON FESTIVAL OF BOOKS2× · 2022–2024 · $100k · revenue +89%
Funded once
- CCCatholic Community Services of Southern Arizona Incgraduatedone grant, 2020 · $120k · revenue +32%
- TVTUCSON VALUES TEACHERSone grant, 2021 · $100k · revenue -13%
- TCTHE CATHOLIC UNIVERSITY OF AMERICAgraduatedone grant, 2021 · $50k · revenue +27%
Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.
The map has a center of gravity: the average direction from the rest of the sector toward the organizations the foundation funds — the shape of its giving. Scoring every nonprofit along that direction surfaces the ones that look most like the portfolio. These are the closest matchesthat aren’t grantees — a resemblance in what they say they do, not a recommendation.
Phoenix children's hospital foundation supports phoenix children's hospital through fundraising ensuring that the hospital continues to stay on the leading edge of pediatric medicine and is equipped to fulfill its mission to advance hope,…
The mission of SSVDP is to promote the spiritual growth of its members through prayer, friendship, and service to others.
Svp tucson is an ever expanding community of engaged philanthropists dedicated to building the capacity, strength and impact of nonprofits in addressing social problems. we accomplish this through: thoughtful and strategic investments and…
Honorhealth's mission is to improve the health and well-being of those we serve.
To connect, support and inform efforts to improve the health of individuals and communities in arizona.
CSCAZ uplifts and strengthens people impacted by cancer by providing support, fostering compassionate communities, and breaking down barriers to care.
We inspire people to live in harmony with the natural world by fostering love, appreciation, and understanding of the sonoran desert.
Our vision is a community where every child receives a high-quality education from birth to career, every adult has the opportunity to thrive financailly and in the workplace, and every older person can retire and age with dignity and…
For reference, the grantee most central to the portfolio’s shape is Casa De Los Ninos and the most unlike its peers is Holtz Charitable Foundation Inc. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
For each theme you fund, this compares how the sector’s money is shifting with how your own giving is shifting.
Sector change and giving change are each shown relative to their own range, growing (right) or shrinking (left); both normalized, so inflation isn’t mistaken for growth.
Your grantees are a median of 36 years old; the field is 14. You back the established end — and your money leans older still.
The field is 23% startups (under 5 years old) — 2% of your grantees by number, and just 1% of your money.
The orgs you fund almost never close — 0.0% lost their exemption, against 14% of the field you don’t fund.
Age = years since IRS exemption (a founding proxy). “Closed” = auto-revocation for 3 years of non-filing — a floor on closure, not proof, and bigger established orgs lapse least. Association, not causation.
39 grantees tracked through their own filings, 2017–2025.
Each one resolved to its own IRS returns and tracked year by year — your grant beside their revenue from every source. Association, dated; never a causal claim.
Counted here: distinct organizations you funded across 2017–2025, not grant rows in a single year — so this will not match the grant count on the cover. 39 of the 71 grantees resolved in that span have returns of their own we could reconcile; the rest are funded organizations whose filings we could not track year by year.
Where your money sits — by cause, then by grantee
Each org by its size and your share of it — top-left is where you’re load-bearing
Go grantee by grantee — a decade per org, and how each moved after you funded them
A decade per grantee — revenue shaded, your grants as bars, all rows on one timeline.
- Who funds University of Arizona Foundation ↗
- Who funds CRISTO REY NETWORK ↗
- Who funds Catholic Community Services of Southern Arizona Inc ↗
- Who funds Community Food Bank Inc ↗
- Who funds TUCSON FESTIVAL OF BOOKS ↗
- Who funds TUCSON VALUES TEACHERS ↗
- Who funds REID PARK ZOOLOGICAL SOCIETY ↗
- Who funds MAGNOLIA GLOBAL ACADEMY FOR LEADERS ↗
- Who funds Coronado Hospital Foundation ↗
- Who funds Sister Jose Women's Center ↗
- Who funds Tucson Conquistadores Foundation ↗
- Who funds THE CATHOLIC UNIVERSITY OF AMERICA ↗
- Who funds HOLTZ CHARITABLE FOUNDATION INC ↗
- Who funds TUCSON CENTERS FOR WOMEN & CHILDREN INC DBA EMERGE CENTER AGAINST DOMESTIC ABUSE ↗
- Who funds Humane Society of Southern Arizona ↗
- Who funds VIVA PIMA ↗
- Who funds ACT ONE ↗
- Who funds RONALD MCDONALD HOUSE CHARITIES OF SOUTHERN ARIZONA INC ↗
- Who funds St Lukes in the Desert Inc ↗
- Who funds ROTARY CLUB OF TUCSON FOUNDATION ↗
- Who funds THE DYNAMIC CATHOLIC INSTITUTE ↗
- Who funds IMPACT OF SOUTHERN ARIZONA ↗
- Who funds YOUTH ON THEIR OWN ↗
The grantmakers whose grantees overlap with yours far more than size alone predicts. Each orbits closer the stronger the alignment; the arcs between them show where they also fund each other. Here it reads as a tightly interlocked camp — most of these funders back each other's grantees too.
Open a dossier: Community Foundation for Southern Arizona · Arizona Community Foundation · United Way of Tucson and Southern Arizona Inc · The Hs Lopez Family Foundation · Jewish Community Foundation of Southern Arizona · Ginny L Clements Charitable Trust · Frederick Gardner Cottrell Foundation · The Intuit Foundation · Connie Hillman Family Foundation · Iverson Family Foundation · The Roy H Rogers Foundation Trust · Marshall Foundation
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. A research starting point: overlap is association, not proof of shared intent.
Government reliance of your grantees
Every dot is one organization William and Mary Ross Foundation funds. Left–right is the share of its income from government; up–down is the share from you. Bigger dots raise more. Filter to federal or a single department — and drag the year to watch it move.
Government income is each org’s traced federal awards (USASpending — grants and contracts) plus state payments (open checkbooks) as a share of its total revenue (IRS Form 990); the self-reported government-grant line (990 line 1e) is carried for cross-check: a grantee that reports government grants we could not trace to a source is left off the chart rather than shown as receiving none. An association, not a claim that your grant caused the public funding. Coverage is precision-first — a floor, not a census; state records exist for 9 states, so a grantee outside them shows no state figure (dimmed) rather than a false zero. Federal award amounts are obligations, which can span years, so a single-year share is indicative. 990 filings lag 12–24 months.
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Find your warmest path to William and Mary Ross Foundation through trustees and officers whose names appear on both boards. Search for your organization and Plinth traces the shortest route it can evidence.
Each link is a name appearing on two organizations’ public IRS 990 filings, matched on that name and, where the filings support it, on location. A same-state match has geographic support, which is a second matching feature rather than confirmation that the two are one person; a cross-state one is the likeliest to be two people who share a name. Every hop shows its tier, low-confidence and distant paths are held back rather than guessed, and it is worth confirming the person before you use the introduction.