· Private foundation
Nancy and Geoffrey Stack Family 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 FY2017–2024.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2024
- Under $10k6 grants · $20k
- $10k–50k7 grants · $132k
- $50k–250k6 grants · $425k
- $250k+3 grants · $2.7M
| Recipient | Amount |
|---|---|
| UC SAN DIEGO FOUNDATION | $1,650,000 |
| THE UNITED WAY | $625,000 |
| THE UC IRVINE FOUNDATION | $400,000 |
| FLYING LEATHERNECK HISTORICAL FD | $120,000 |
| 24 HOURS FOR HANK | $105,000 |
| ULI FOUNDATION | $50,000 |
| NEWPORT BEACH PUBLIC LIBRARY FD | $50,000 |
| HOAG HOSPITAL FOUNDATION | $50,000 |
| LAURA'S HOUSE | $50,000 |
| UNIVERSITY OF PENNSYLVANIA | $25,000 |
| GEORGETOWN UNIVERSITY SCHOLARSHIP | $25,000 |
| ACHIEVE | $25,000 |
| OVER THE RAINBOW | $22,000 |
| THE WOODEN FLOOR | $15,000 |
| SPIN | $10,000 |
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 (FY17–24, $711k) land where the poverty rate runs at 10%, against an area that typically sits at 10%. 99% 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 +43% since the first grant, against +9% for the ones you funded once.
46 repeat relationships — 20 still active in FY2024, 26 since wound down.
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, 100% of grant dollars renewed an existing relationship; $0 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
- USUC SAN DIEGO FOUNDATION2× · 2023–2024 · $2.5M · revenue +33%
- UOUNIVERSITY OF CALIFORNIA IRVINE FOUNDATION5× · 2020–2024 · $1.6M · revenue +95%
- LHLAURA'S HOUSE7× · 2017–2024 · $575k · revenue +49%
Funded once
- OCORANGE COUNTY MUSEUM OF ARTone grant, 2022 · $50k · revenue -57%
- OROCC-OC REAL ESTATE LUNCHEONone grant, 2017 · $10k
- HBHOME BASEone grant, 2022 · $10k
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.
The ucla foundation is the giving, receiving, and investing arm of the ucla campus. the foundation enables private donors to help build, sustain and advance one of the world's finest academic and research institutions. private philanthropy…
The san diego foundation inspires enduring philanthropy and enables community solutions to improve the quality of life in our region.
The uc santa barbara foundation actively works to further the goals of the university of california, santa barbara. the foundation seeks to maintain and nurture the university's quality and distinction. on behalf of the campus, the…
The mission of the uc davis foundation is to secure, steward and manage private gifts for uc davis.
The organization provides professional investment management services for endowed gifts and financial assets entrusted to the ucsf foundation.
Serves the mission of the university by supporting and engaging in research, entrepreneurship, community service, sponsored programs and the acquisition of private resources.
The mission of mit is to advance knowledge and educate students in science, technology, and other areas of scholarship that will best serve the nation and the world in the 21st century.
Provide an independent forum for those who dare to read, think, speak, and write to advance the professional, literary, and scientific understanding of sea power and other issues critical to global security.
The foundation's mission is to improve the oral health of all californians by supporting the dental profession and its efforts to meet community needs.
Our mission is to support the naval postgraduate school by providing funding and programmatic support for education, research, technology development, institutional initiatives, and community programs that advance national security and…
Chcf is dedicated to advancing meaningful, measurable improvements in the way the health care delivery system provides care to the people of california, particularly those with low incomes and those whose needs are not well served by the…
To support educational, research and public functions and programs of the riverside campus of the university of california.
For reference, the grantee most central to the portfolio’s shape is Orange County Community Foundation and the most unlike its peers is Matt Leinart Foundation. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
Your grantees are a median of 32 years old; the field is 13. You back the established end — and your money leans older still.
The field is 25% startups (under 5 years old) — 4% of your grantees by number, and just 0% of your money.
The orgs you fund almost never close — 2% lost their exemption, against 15% 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.
57 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. 57 of the 92 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 UNITED WAY INC ↗
- Who funds UC SAN DIEGO FOUNDATION ↗
- Who funds UNIVERSITY OF CALIFORNIA IRVINE FOUNDATION ↗
- Who funds CYSTINOSIS RESEARCH FOUNDATION ↗
- Who funds LAURA'S HOUSE ↗
- Who funds THE ULI FOUNDATION ↗
- Who funds HOAG HOSPITAL FOUNDATION ↗
- Who funds TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA ↗
- Who funds CHAPMAN UNIVERSITY ↗
- Who funds MARINE CORPS SCHOLARSHIP FOUNDATION INC ↗
- Who funds 24 HOURS FOR HANK INC ↗
- Who funds NEWPORT BEACH PUBLIC LIBRARY FOUNDATION ↗
- Who funds MARINE CORPS UNIVERSITY FOUNDATION INC ↗
- Who funds ATLANTIC COUNCIL OF THE UNITED STATES INC ↗
- Who funds Serving People In Need Inc ↗
- Who funds THE WOODEN FLOOR FOR YOUTH MOVEMENT ↗
- Who funds ORANGE COUNTY MUSEUM OF ART ↗
- Who funds ORANGE COUNTY COMMUNITY FOUNDATION ↗
- Who funds Carrington Charitable Foundation ↗
- Who funds SOUTH COAST REPERTORY INC ↗
- Who funds Share Our Selves Corporation ↗
- Who funds St Anne's Family Services ↗
- Who funds STARS AND STRIPES CHILDREN'S FOUNDATION ↗
- Who funds Direct Connections To Africa ↗
- Who funds Berkeley Real Estate Forum ↗
- Who funds Project Access Inc ↗
- Who funds CALIFORNIA COMMUNITY FOUNDATION ↗
- Who funds California Homebuilding Foundation ↗
- Who funds MATT LEINART FOUNDATION ↗
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: Orange County Community Foundation · Argyros Family Foundation · Croul Family Foundation · Jewish Community Foundation of Orange County · The William Gillespie Foundation · The Beall Family Foundation · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · California Community Foundation · Frome Family Foundation · Witte-Sakamoto Family Foundation · The Neisser Family Foundation · Ueberroth Family 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 Nancy and Geoffrey Stack Family 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.
Warm introductions · Powered by PlinthPlus
How do I get to Nancy and Geoffrey Stack Family Foundation?
Find your warmest path to Nancy and Geoffrey Stack Family 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.