· Private foundation
The J Mark Grosvenor 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 $10k2 grants · $2k
- $10k–50k2 grants · $55k
- $50k–250k1 grant · $50k
| Recipient | Amount |
|---|---|
| BROWARD SHERIFF'S ADVISORY COUNCIL | $50,000 |
| BOYS TO MEN MENTORING NETWORK | $27,500 |
| PROMISE2KIDS | $27,500 |
| CEREBRAL PALSY OF SD | $1,000 |
| EASTERSEALS | $500 |
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 (FY17–22, $56k) land where the poverty rate runs at 11%, 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 +38% since the first grant, against +4% for the ones you funded once.
24 repeat relationships — 2 still active in FY2024, 22 since wound down; 3 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, 73% of grant dollars renewed an existing relationship; $29k 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
- UWUNITED WAY INC3× · 2018–2020 · $432k · revenue +8%
- BSBROWARD SHERIFF'S ADVISORY COUNCIL INC7× · 2017–2024 · $252k · revenue +85%
- RSRISING SEAS INSTITUTE INC3× · 2020–2023 · $140k · revenue +165% · 90% of their budget
Funded once
- EIEDESIA INCone grant, 2022 · $250k · revenue +22%
- SPSoteria Precision Medicine Foundation Incone grant, 2023 · $100k · revenue -6%
- PFPROMISES2KIDS FOUNDATIONone grant, 2021 · $42k · revenue -12%
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.
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.
To support and further the research, education and community service objectives of san diego state university.
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…
California ocean science trust (ost) is a non-profit organization dedicated to accelerating progress towards a healthy and productive ocean future for california. created by state legislation, ost bridges the gap between cutting-edge…
The organization provides professional investment management services for endowed gifts and financial assets entrusted to the ucsf foundation.
The mission of the uc davis foundation is to secure, steward and manage private gifts for uc davis.
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…
To support the social, recreational, cultural and education programs and facilities, both on campus and in the community, and to advocate for student interests, provide leadership opportunities and participate in shared governance.
The university of san diego is a contemporary catholic university, grounded in the liberal arts and anchored along an international border, advancing academic excellence to create a more inclusive, sustainable and hopeful world.
Programmed and coordinated visits to san diego by international visitors and escorts, working in association with appropriate united states government agencies and the global ties u.s. network.
To spark breakthrough community action that elevates every child and family toward a brighter future.
For reference, the grantee most central to the portfolio’s shape is Wounded Warrior Project Inc and the most unlike its peers is Alexander and Eva Nemeth 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 29 years old; the field is 14. You back the established end — and your money leans older still.
The field is 24% startups (under 5 years old) — 2% of your grantees by number, and just 0% 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.
45 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. 45 of the 58 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 BROWARD SHERIFF'S ADVISORY COUNCIL INC ↗
- Who funds EDESIA INC ↗
- Who funds RISING SEAS INSTITUTE INC ↗
- Who funds ZOOLOGICAL SOCIETY OF SAN DIEGO ↗
- Who funds ORANGE COUNTY'S UNITED WAY ↗
- Who funds Soteria Precision Medicine Foundation Inc ↗
- Who funds Boys to Men Mentoring Network Inc ↗
- Who funds MARSH CHLDRENS HOME ACAPULCO INC ↗
- Who funds PROMISES2KIDS FOUNDATION ↗
- Who funds BOYS & GIRLS CLUBS OF BROWARD COUNTY INC ↗
- Who funds Ocean Enterprises Foundation ↗
- Who funds MCALISTER INSTITUTE FOR TREATMENT & EDUCATION INC ↗
- Who funds CHP 11-99 FOUNDATION ↗
- Who funds YOUTH WITHOUT BORDERS INC ↗
- Who funds University of Santa Monica ↗
- Who funds COAST GUARD FOUNDATION INC ↗
- Who funds EPILEPSY SOCIETY OF SAN DIEGO COUNTY ↗
- Who funds COLORADO UPLIFT INC ↗
- Who funds ST JUDE CHILDREN'S RESEARCH HOSPITAL INC ↗
- Who funds STEPHEN SILLER TUNNEL TO TOWERS FOUNDATION ↗
- Who funds FLORIDA BREAST CANCER COALITION RESEARCH FOUNDATION INC ↗
- Who funds AMERICAN STUDIES CENTER ↗
- Who funds LIVE LIKE KAYLA FOUNDATION ↗
- Who funds Coalition for a Drug-Free Hawaii ↗
- Who funds NATIONAL CORVETTE MUSEUM FOUNDATION INC ↗
- Who funds Hui O Waa Kaulua ↗
- Who funds SAN DIEGO YACHT CLUB SAILING FOUNDATION ↗
- Who funds CUREBOUND ↗
- Who funds Point Loma Rotary Endowment Fund Inc ↗
- Who funds KISS THE GROUND ↗
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: The San Diego Foundation · Morgan Dene and Elizabeth Hamman Oliver Family Foundation Inc · Sempra Foundation · The Pfizer Foundation Inc · Shell USA Company Foundation · Renaissance Charitable Foundation Inc · Vanguard Charitable Endowment Program · The Blackbaud Giving Fund · Morgan Stanley Global Impact Funding Trust Inc · The Bank of America Charitable Foundation Inc · Paypal Charitable Giving Fund · Natl Christian Charitable Fdn Inc
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 The J Mark Grosvenor 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.
- Wounded Warrior Project Inc — 0% of income from government
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 The J Mark Grosvenor Foundation?
Find your warmest path to The J Mark Grosvenor 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.