· Private foundation
Mary & Bob Sierra Family Foundation Inc
Its FY2025 filing reports that it accepted unsolicited grant applications.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2021–2025.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2025
- Under $10k50 grants · $108k
- $10k–50k22 grants · $484k
- $50k–250k6 grants · $853k
| Recipient | Amount |
|---|---|
| Hillsborough Education Foundation | $196,400 |
| Pasco Education Foundation Inc | $195,900 |
| Hernando County Education Foundation Inc | $159,989 |
| Tampa Metropolitan Area YMCA | $145,000 |
| St Joseph's Hospitals Foundation | $105,000 |
| First Tee | $51,000 |
| Academy Prep Center of Tampa | $49,550 |
| Children's Advocacy Center of Hernando City | $46,250 |
| Bob Sierra YMCA Misc Operations | $40,000 |
| End 68 Hours of Hunger | $35,000 |
| Homosassa Civic Club | $27,450 |
| John B Gorrie Foundation Inc | $26,250 |
| United Food Bank & Services of Plant City Inc | $25,000 |
| Ignite Academy | $24,500 |
| Portico Housing Solutions Inc | $20,000 |
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 (FY21–25, $576k) land where the poverty rate runs at 13%, against an area that typically sits at 11%. 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 +21% since the first grant, against +14% for the ones you funded once.
79 repeat relationships — 58 still active in FY2025, 21 since wound down; 18 grantees were first funded in FY2025 (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 FY2025, 91% of grant dollars renewed an existing relationship; $110k 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
- PEPASCO EDUCATION FOUNDATION INC5× · 2021–2025 · $909k · revenue +15%
- SJST JOSEPH'S HOSPITAL OF TAMPA FOUNDATION INC5× · 2021–2025 · $326k · revenue +765%
- TMTAMPA METROPOLITAN AREA YOUNG MEN'S CHRISTIAN ASSOCIATION INC5× · 2021–2025 · $320k · revenue +24%
Funded once
- HVHope Villages of America Incone grant, 2023 · $23k · revenue +17%
- AWAdventHealth Wesley Chapel Foundationone grant, 2022 · $10k
Southern Appalachian Highlands Conservancyone grant, 2024 · $10k · revenue -36%
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.
UF Health's mission is to promote health through outstanding and high-quality patient care, innovative and rigorous education in the health professions and biomedical sciences, and high-impact research across the spectrum of basic,…
The mission of suncoast hospice foundation is to advance the understanding, participation, and support of the mission and programs of suncoast hospice and its affilated organizations, honoring the community's sacred trust through sound…
Florida community health centers, inc. (fchc) is a federally qualified health center serving medically needy populations in south florida, with an emphasis on serving rural and farm worker communities.
Suncoast hospice's mission is to be the center to improve life for those touched by advanced illness, death, dying, grief, bereavement and other end-of-life issues.
As the region's leading safety net hospital, tampa general hospital is committed to providing area residents with excellent and compassionate health care ranging from the simplest to the most complex medical services. our shared purpose:…
The mission of heart of florida united way is to improve lives by mobilizing the caring power of our communities. this is accomplished by standing up for the health, education, and financial stability of every person in central florida.
The family healthcare foundation's mission is to be the trusted leader in our community, ensuring access to high-quality healthcare for all in the tampa bay area. see also schedule o.
The florida health care education and development foundation, inc. promotes the educational and professional growth of employees in fhca member centers to support staff stability and improved outcomes of resident care. its mission is to…
The tampa bay partnership is a privately funded, ceo-driven regional advocacy organization, committed to creating a unified, competitive and prosperous tampa bay.
Hospice of the treasure coast, inc. exists to provide hospice, grief counseling, education and other services to patients and families dealing with death and dying so that they might live as fully and comfortably as possible.
Hospice of martin & st. lucie, inc. exists to provide hospice, grief counseling, education and other services to patients and families, dealing with death and dying so that they might live as fully and comfortably as possible. hospice…
Suncoast hospice institute is now inactive.
For reference, the grantee most central to the portfolio’s shape is Community Foundation of Tampa Bay Inc and the most unlike its peers is Asthma Warriors 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 25 years old; the field is 11. You back the established end — and your money leans older still.
The field is 28% startups (under 5 years old) — 2% of your grantees by number, and just 0% of your money.
The orgs you fund almost never close — 0.9% lost their exemption, against 17% 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.
104 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. 104 of the 153 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 PASCO EDUCATION FOUNDATION INC ↗
- Who funds Hillsborough Education Foundation Inc ↗
- Who funds ST JOSEPH'S HOSPITAL OF TAMPA FOUNDATION INC ↗
- Who funds TAMPA METROPOLITAN AREA YOUNG MEN'S CHRISTIAN ASSOCIATION INC ↗
- Who funds ACADEMY PREP CENTER OF TAMPA INC ↗
- Who funds END 68 HOURS OF HUNGER ↗
- Who funds THE CRISIS CENTER OF TAMPA BAY INC ↗
- Who funds YOUNG MEN'S CHRISTIAN ASSOCIATION OF THE SUNCOAST INC ↗
- Who funds University of South Florida Foundation Inc ↗
- Who funds CORBETT PREPARATORY SCHOOL OF IDS INC ↗
- Who funds UNITED FOOD BANK & SERVICES OF PLANT CITY INC ↗
- Who funds COMMUNITY FOUNDATION OF TAMPA BAY INC ↗
- Who funds HOMOSASSA CIVIC CLUB INC ↗
- Who funds NEW CREATION OUTREACH INC ↗
- Who funds FEEDING AMERICA TAMPA BAY INC ↗
- Who funds METROPOLITAN MINISTRIES INC ↗
- Who funds OPERATION HEART FELT FOUNDATION ↗
- Who funds One Community Now Inc ↗
- Who funds IGNITE ACADEMY INC ↗
- Who funds JOHN B GORRIE FOUNDATION INC ↗
- Who funds WAKE FOREST UNIVERSITY ↗
- Who funds FELLOWSHIP OF CHRISTIAN ATHLETES ↗
- Who funds STARTING RIGHT NOW ↗
- Who funds Hope Villages of America Inc ↗
- Who funds PORTICO HOUSING SOLUTIONS INC ↗
- Who funds JUNIOR ACHIEVEMENT OF TAMPA BAY INC ↗
- Who funds AEROSPACE CENTER FOR EXCELLENCE INC ↗
- Who funds St Joseph's Hospital Inc ↗
- Who funds TAMPA BAY WATCH INC ↗
- Who funds SPECIAL OLYMPICS FLORIDA Inc ↗
- Who funds CHILDREN'S CANCER CENTER INC ↗
- Who funds TAMPA BAY WAVE INC ↗
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 of Tampa Bay Inc · Debartolo Family Foundation Inc · Vinik Family Foundation · Suncoast Credit Union Foundation · Rays Baseball Foundation Inc · Publix Super Markets Charities Inc · Pinellas Community Foundation · The Spurlino Foundation · The Florida Medical Clinic Foundation of Caring Inc · Frank E Duckwall Foundation · Lightning Foundation · New York Yankees Tampa Foundation 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 Mary & Bob Sierra Family Foundation Inc 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, a single department, or state — and drag the year to watch it move.
- Tampa Bay Wave Inc — 100% of income from government
- Save Crystal River Inc — 55% of income from government
- Pasco County Fair Association Inc — 53% of income from government
- Redlands Christian Migrant Association Inc — 51% of income from government
- The Crisis Center of Tampa Bay Inc — 6% of income from government
- Tampa Metropolitan Area Young Men's Christian Association Inc — 4% of income from government
- Academy Prep Center of Tampa Inc — 3% of income from government
- Big Brothers Big Sisters of Tampa Bay Inc — 3% of income from government
- Feeding America Tampa Bay Inc — 2% of income from government
- Hope Villages of America Inc — 2% of income from government
- One Community Now Inc — 1% of income from government
- Lowry Park Zoological Society of Tampa Inc — 0% of income from government
- Metropolitan Ministries Inc — 0% of income from government
- Pasco Education Foundation Inc — 0% of income from government
- Junior Achievement of Tampa Bay Inc — 0% of income from government
- Wounded Warrior Project Inc — 0% of income from government
- St Joseph's Hospital Inc — 0% of income from government
- The Florida Aquarium 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 Mary & Bob Sierra Family Foundation Inc?
Find your warmest path to Mary & Bob Sierra Family Foundation Inc 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.