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Mary & Bob Sierra Family Foundation Inc at a glance

· Private foundation

Mary & Bob Sierra Family Foundation Inc

Its FY2025 filing reports that it accepted unsolicited grant applications.

$1.4M
Granted FY2025still arriving
78
Grants FY2025still arriving
12
States reached
$196k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0198% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2021 to 2025.

Education$2.6MHuman Services$887kHealth$531kFood & Nutrition$215kHousing & Shelter$89kPhilanthropy$66kRecreation & Sports$60kReligion$56kOther$0
02FY2025 · 78 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k50 grants · $108k
  • $10k–50k22 grants · $484k
  • $50k–250k6 grants · $853k
$4,000
Median grant
12
States reached
$23M
Total assets
Largest grants
RecipientAmount
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
People Helping People in Hernanco County Inc$20,000
02The need
03

Does the money reach high-need areas?

Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.

show:

Its 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 its grants land in higher-need ZIPs.

area typical 11%The Refuge Ranch: $3k → 20%Children's Hope Alliance Foundation: $250 → 9%Man Up and Go: $1k → 12%Hope Villages of America Inc: $23k → 12%Elk River Helping Hands: $13k → 21%The ARC Tampa Bay Foundation Inc: $1k → 12%Emerald M Therapeutic Riding Center Inc: $5k → 12%Emerald M Therapeutic Riding Center Inc: $3k → 12%Emerald M Therapeutic Riding Center Inc: $3k → 12%Emerald M Therapeutic Riding Center Inc: $1k → 12%YMCA of the Suncoast: $20k → 12%Emerald M Therapeutic Riding Center Inc: $1k → 12%YMCA of the Suncoast: $10k → 12%YMCA of the Suncoast: $10k → 12%YMCA of the Suncoast: $10k → 12%YMCA of the Suncoast: $10k → 12%Tampa Metropolitan Area YMCA: $145k → 13%Tampa Metropolitan Area YMCA: $100k → 13%Tampa Metropolitan Area YMCA: $50k → 13%Metropolitan Ministries: $17k → 13%Metropolitan Ministries: $15k → 13%Metropolitan Ministries: $4k → 13%Metropolitan Ministries: $2k → 13%A Kid's place of Tampa Bay: $5k → 13%A Kid's Place of Tampa Bay Inc: $3k → 13%A Kid's Place of Tampa Bay Inc: $3k → 13%The First Tee of Tampa Bay: $23k → 13%The First Tee of Tampa Bay: $3k → 13%New Creation Outreach Inc: $5k → 13%Kids and Canines Inc: $1k → 13%New Creation Outreach Inc: $5k → 13%Kids and Canines Inc: $500 → 13%Kids and Canines Inc: $500 → 13%Kids and Canines Inc: $500 → 13%New Creation Outreach Inc: $10k → 13%New Creation Outreach Inc: $10k → 13%New Creation Outreach Inc: $10k → 13%United Food Bank & Services of Plant City Inc: $30k → 13%United Food Bank & Services of Plant City Inc: $25k → 13%Holiday Charity Ball Inc: $350 → 13%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount
How this is measured
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty line in the grantee’s ZIP, averaged from the tracts in that ZIP.

Which US states its grants reach

MT
MN
IL
WI
NY
IA
IN
PA
CA
VA
MD
KS
NC
DC
GA
TX
FL
How this is measured
US grants placed by each grantee’s ZIP, which can differ from where services are delivered. Need from public data (U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA), shown as context about the area, never attributed to the funder’s giving.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

94%of every dollar goes to organizations it has funded before.
$3.7M · 79 repeat orgs$251k to everyone else

Grantees it renews have grown median revenue +21% since the first grant, against +14% for those 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

Re-uppedFunded once

Organizations

79
51

Total granted

$3.7M
$141k

Median revenue growth · since first grant

+21%
+14%

Still filing today

71%
57%

New vs renewed · share of each year

In FY2025, 91% of grant dollars renewed an existing relationship; $110k went to new ones.

50%100%’21’22’23’24’25
RenewedFirst-time

Where new relationships form · theme of each grantee’s first grant

’21’22’23’24’25
Human ServicesHealthEducationPhilanthropyEnvironmentFood & NutritionOther
How this is measured
First-time means a grantee’s first year in the filing window; renewed means funded in an earlier year too. The renewed share climbs naturally as a portfolio matures, so the signal is a year that bucks it (a wave of new grantees). 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

  • PE
    PASCO EDUCATION FOUNDATION INC
    5× · 2021–2025 · $909k · revenue +15%
  • SJ
    ST JOSEPH'S HOSPITAL OF TAMPA FOUNDATION INC
    5× · 2021–2025 · $326k · revenue +765%
  • TM
    TAMPA METROPOLITAN AREA YOUNG MEN'S CHRISTIAN ASSOCIATION INC
    5× · 2021–2025 · $320k · revenue +24%

Funded once

  • HV
    Hope Villages of America Inc
    one grant, 2023 · $23k · revenue +15%
  • AW
    AdventHealth Wesley Chapel Foundation
    one grant, 2022 · $10k
  • Southern Appalachian Highlands Conservancy
    one grant, 2024 · $10k · revenue -36%
How this is measured

Repeat means funded in two or more distinct years. Growth and survival are read from each grantee’s own subsequent IRS filings.

04Its field

Closest unfunded matches

The nonprofits that most resemble its grantees but are not funded by it, scored along the direction from the rest of the field toward the portfolio. A resemblance in what they say they do, not a recommendation.

1
University of Florida Health Corporation

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,…

—
2
The Hospice Foundation of the Florida Suncoast Inc

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…

—
3
Florida Community Health Centers Inc

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.

—
4
The Hospice of the Florida Suncoast Inc

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.

Human Services
5
Florida Health Sciences Center Inc

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:…

Health
6
Heart of Florida United Way Inc

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.

Philanthropy
7
The Family Healthcare Foundation Inc

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.

Health
8
Florida Health Care Education & Development Foundation Inc

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…

—
9
Tampa Bay Partnership Inc

The tampa bay partnership is a privately funded, ceo-driven regional advocacy organization, committed to creating a unified, competitive and prosperous tampa bay.

—
10
Hospice of the Treasure Coast Inc

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.

—
11
Hospice of Martin & St Lucie Inc

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…

Human Services
12
The Hospice Institute of the Florida Suncoast Inc

Suncoast hospice institute is now inactive.

—
How this is measured
The grantee most central to the portfolio’s shape is Community Foundation of Tampa Bay Inc; 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.
04the grantee network

104 grantees tracked through their own filings, 2017–2026.

Each grant beside the grantee’s revenue from every source, year by year.

How this is measured

Counted here: distinct organizations funded across 2017 to 2026, 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.

Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.

0
Load-bearing (≥25% of a budget)
17
Early backer (in before they grew)
102/104
Grantees still filing
67/104
Grew since first funded

Where the money sits, by cause and then by grantee

Hillsborough Education Foundation Inc: $810,550 · EducationHillsborough Education Founda…ACADEMY PREP CENTER OF TAMPA INC: $180,800 · EducationACADEMY PREP CENTER OF TAMPA …University of South Florida Foundation Inc: $57,500 · EducationCORBETT PREPARATORY SCHOOL OF IDS INC: $56,083 · Education+9 more: $123,250 · Education+9 moreHernando County Education Foundation Inc: $415,969 · OtherHernando County Education Foun…Bob Sierra YMCA Misc Operations: $210,000 · OtherBob Sierra YMCA Misc Operation…First Tee: $123,633 · OtherFirst TeeChildren's Advocacy Center of Hernando City: $46,250 · OtherPeople Helping People in Hernanco County Inc: $45,000 · Other+77 more: $451,376 · Other+77 morePASCO EDUCATION FOUNDATION INC: $909,150 · PhilanthropyPASCO EDUCATION FOUNDAT…COMMUNITY FOUNDATION OF TAMPA BAY INC: $47,137 · Philanthropy+10 more: $28,650 · PhilanthropyTAMPA METROPOLITAN AREA YOUNG MEN'S CHRISTIAN ASSOCIATION INC: $320,000 · Human ServicesTAMPA METROPO…YOUNG MEN'S CHRISTIAN ASSOCIATION OF THE SUNCOAST INC: $60,000 · Human ServicesYOUNG MEN'S C…UNITED FOOD BANK & SERVICES OF PLANT CITY INC: $55,000 · Human ServicesUNITED FOOD B…NEW CREATION OUTREACH INC: $40,000 · Human ServicesNEW CREATION …METROPOLITAN MINISTRIES INC: $36,500 · Human ServicesMETROPOLITAN …Hope Villages of America Inc: $22,500 · Human Services+12 more: $48,300 · Human Services+12 moreST JOSEPH'S HOSPITAL OF TAMPA FOUNDATION INC: $326,000 · HealthST JOSEPH'…THE CRISIS CENTER OF TAMPA BAY INC: $72,000 · HealthTHE CRISIS…St Joseph's Hospital Inc: $18,000 · Health+10 more: $37,800 · Health+10 moreEND 68 HOURS OF HUNGER: $80,000 · Food & NutritionHOMOSASSA CIVIC CLUB INC: $42,450 · Food & NutritionFEEDING AMERICA TAMPA BAY INC: $39,500 · Food & NutritionOPERATION HEART FELT FOUNDATION: $35,000 · Food & Nutrition+3 more: $5,500 · Food & NutritionTAMPA BAY WATCH INC: $14,000 · EnvironmentSouthern Appalachian Highlands Conservancy: $10,000 · EnvironmentCHILDREN'S HEALTH DEFENSE: $10,000 · EnvironmentHOMOSASSA RIVER RESTORATION PROJECT INC: $6,000 · EnvironmentEARTHJUSTICE: $5,000 · EnvironmentOCEANA INC: $5,000 · EnvironmentSAVE CRYSTAL RIVER INC: $4,000 · Environment+1 more: $250 · Environment
Education$1,228,183Other$1,292,228Philanthropy$984,937Human Services$582,300Health$453,800Food & Nutrition$202,450Environment$54,250

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetPASCO EDUCATION FOUNDATION INC: $909,150 over 5y, 21% of budgetHillsborough Education Foundation Inc: $810,550 over 5y, 2.4% of budgetST JOSEPH'S HOSPITAL OF TAMPA FOUNDATION INC: $326,000 over 5y, 1.2% of budgetTAMPA METROPOLITAN AREA YOUNG MEN'S CHRISTIAN ASSOCIATION INC: $320,000 over 5y, 0.3% of budgetACADEMY PREP CENTER OF TAMPA INC: $180,800 over 4y, 3.1% of budgetEND 68 HOURS OF HUNGER: $80,000 over 2y, 2.2% of budgetTHE CRISIS CENTER OF TAMPA BAY INC: $72,000 over 5y, 0.1% of budgetYOUNG MEN'S CHRISTIAN ASSOCIATION OF THE SUNCOAST INC: $60,000 over 5y, 0.1% of budgetUniversity of South Florida Foundation Inc: $57,500 over 4y, 0.1% of budgetCORBETT PREPARATORY SCHOOL OF IDS INC: $56,083 over 5y, 0.1% of budgetUNITED FOOD BANK & SERVICES OF PLANT CITY INC: $55,000 over 2y, 0.3% of budgetCOMMUNITY FOUNDATION OF TAMPA BAY INC: $47,137 over 1y, 0.1% of budgetHOMOSASSA CIVIC CLUB INC: $42,450 over 3y, 10% of budgetNEW CREATION OUTREACH INC: $40,000 over 5y, 8.0% of budgetFEEDING AMERICA TAMPA BAY INC: $39,500 over 4y, 0.0% of budgetMETROPOLITAN MINISTRIES INC: $36,500 over 4y, 0.0% of budgetOPERATION HEART FELT FOUNDATION: $35,000 over 2y, 13% of budgetOne Community Now Inc: $30,000 over 2y, 1.7% of budgetIGNITE ACADEMY INC: $29,500 over 2y, 1.8% of budgetJOHN B GORRIE FOUNDATION INC: $28,750 over 2y, 5.7% of budgetWAKE FOREST UNIVERSITY: $28,500 over 5y, 0.0% of budgetFELLOWSHIP OF CHRISTIAN ATHLETES: $28,000 over 5y, 0.0% of budgetSTARTING RIGHT NOW: $26,600 over 3y, 0.4% of budgetHope Villages of America Inc: $22,500 over 1y, 0.2% of budgetJUNIOR ACHIEVEMENT OF TAMPA BAY INC: $20,000 over 2y, 0.3% of budgetAEROSPACE CENTER FOR EXCELLENCE INC: $19,000 over 4y, 0.4% of budgetSt Joseph's Hospital Inc: $18,000 over 2y, 0.0% of budgetSPECIAL OLYMPICS FLORIDA Inc: $14,000 over 5y, 0.0% of budgetTAMPA BAY WATCH INC: $14,000 over 4y, 0.2% of budgetCHILDREN'S CANCER CENTER INC: $13,500 over 5y, 0.2% of budgetTAMPA BAY WAVE INC: $13,000 over 5y, 0.2% of budgetSUN 'N FUN FLY-IN INC: $13,000 over 5y, 0.0% of budgetBig Brothers Big Sisters of Tampa Bay Inc: $12,890 over 4y, 0.1% of budgetEmerald M Therapeutic Riding Center Inc: $12,000 over 5y, 0.7% of budgetSUNCOAST ANIMAL LEAGUE INC: $11,500 over 2y, 0.9% of budgetGOLD SHIELD FOUNDATION INC: $11,300 over 3y, 8.2% of budgetSouthern Appalachian Highlands Conservancy: $10,000 over 1y, 0.0% of budgetA KID'S PLACE OF TAMPA BAY INC: $10,000 over 3y, 0.1% of budgetCHILDREN'S HEALTH DEFENSE: $10,000 over 2y, 0.0% of budgetGRACEPOINT FOUNDATION INC: $8,500 over 2y, 2.2% of budgetTHE ANGELUS INC: $8,500 over 2y, 0.2% of budgetAPPALACHIAN REGIONAL HEALTHCARE FOUNDATION INC: $8,500 over 3y, 0.2% of budgetLowry Park Zoological Society of Tampa Inc: $8,000 over 2y, 0.0% of budgetHOMOSASSA RIVER RESTORATION PROJECT INC: $6,000 over 2y, 0.1% of budgetEAA AVIATION FOUNDATION INC: $5,875 over 5y, 0.0% of budgetEARTHJUSTICE: $5,000 over 1y, 0.0% of budgetHABITAT FOR HUMANITY OF CITRUS COUNTY INC: $5,000 over 1y, 0.1% of budgetOCEANA INC: $5,000 over 1y, 0.0% of budget
Grantee by grantee: a decade per organization, before and after funding

A decade per grantee: revenue shaded, grants as bars, all rows on one timeline.

Co-funders

Grantmakers whose grantees overlap with this funder’s far more than size alone predicts. Closer means stronger alignment; arcs show where they also fund each other. Here they form a tightly interlocked group: most of these funders back each other's grantees too.

Community Foundation …Debartolo Family Foun…Vinik Family Foundati…Suncoast Credit Union…Rays Baseball Foundat…Publix Super Markets …Pinellas Community Fo…The Spurlino Foundati…The Florida Medical C…Frank E Duckwall Foun…Lightning FoundationNew York Yankees Tamp…
Community Foundation of Tampa Bay IncFL61.4× affinity33 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

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

How this is measured
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. Overlap is association, not proof of shared intent.

How much its grantees rely on government

Each dot is one organization Mary & Bob Sierra Family Foundation Inc funds: left to right is the share of its income from government, bottom to top the share from Mary & Bob Sierra Family Foundation Inc. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 390%2%6%14%25%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →median 2%
  • 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
no gov moneyreceives it· size = income
39get no government money at all
22report government grants on their 990 we could not trace to a source (not plotted)
4rely on government for over half their income
typical government reliance, FY20–25
How this is measured
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 a grant caused the public funding. Coverage is precision-first, a floor rather than 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 to 24 months.
05Through Plinth

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.

On method. Every financial figure here is read from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 153 grantees we resolved, each linked to its source. Grantee outcomes are each organization’s own program-service reporting (Form 990, Part III), read as association with funding, never as caused by it. Low-confidence name matches are suppressed rather than guessed. How we build these →

How this is measured
Each figure carries one of six labels. Filed is what the funder reported on its return. Official is another government record about an organization, such as a federal award or a charity register, joined by name where no shared identifier exists. Resolved is an identity we worked out where the filing named a recipient without an EIN, kept only above a measured confidence threshold. Computed is arithmetic over those, like themes, portfolio clusters and co-funder strength. Context is a statistic about a place rather than about an organization, which is what the need overlay is: it describes the area a grantee’s address sits in, not where its work lands. Inferred is drawn by a model from text, like the partnerships read out of public news and organization websites. Each is labeled where it appears.

Generated from the IRS Form 990-PF e-file return for fiscal year 2025, released 2025. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on Mary & Bob Sierra Family’s filings →

More from the funding graph

The unnamed billions
grants reported with no recipient in the public record
The regranting layer
51% of grant dollars land in the regranting layer
The DAF merry-go-round
$9.7B circulates between donor-advised funds
The endowment market
who holds foundation money, and what just moved
The camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home