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Florida · Private foundation

Mary & Bob Sierra Family Foundation Inc

Its FY2025 filing reports that it accepted unsolicited grant applications.

$1.4M
Granted FY2025(still arriving)
78
Grants FY2025
76
Organizations funded FY2024
37%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$4,000
Largest grant, FY2025
$196,400
Organizations funded a year
54 to 76
FY2021 to FY2024
States reached, FY2025
12
Total assets, FY2025
$23M
Applications
Takes unsolicited applications
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 37% of the organizations Mary & Bob Sierra Family Foundation Inc funded were first-time grantees, receiving 19% of its grant dollars.

New vs renewed · share of each year

In FY2024, 81% of grant dollars renewed an existing relationship; $199k went to new ones.

50%100%’22’23’24
RenewedFirst-time

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

’22’23’24
Human ServicesEducationHealthAnimalsEnvironmentPhilanthropyOther
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.
The numbers by year
Fiscal yearOrganizations fundedTo those organizationsFirst-time grantees
FY2025still arriving76$1.2M24%
FY202476$1.1M37%
FY202361$788k39%
FY202254$436k44%
FY202154$400kn/a
98% 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

Where its grants go

Grant dollars by states, across the years we hold.

Which US states its grants reach

MT
MN
IL
WI
NY
IA
IN
PA
CA
VA
MD
KS
NC
DC
GA
TX
FL

Top grantees

Largest recipients by total granted, FY2021 to FY2025, and the share of each one’s budget the grants supplied at peak.

Show all 110 grantees
All grantees of Mary & Bob Sierra Family Foundation Inc by total granted
GranteeTotal grantedYearsShare of their budget
Pasco Education Foundation Inc$909,150521%
St Joseph's Hospital of Tampa Foundation Inc$326,00051%
Tampa Metropolitan Area Young Men's Christian Association Inc$320,00050%
Academy Prep Center of Tampa Inc$180,80043%
End 68 Hours of Hunger$80,00022%
The Crisis Center of Tampa Bay Inc$72,00050%
Young Men's Christian Association of the Suncoast Inc$60,00050%
University of South Florida Foundation Inc$57,50040%
Corbett Preparatory School of Ids Inc$56,08350%
United Food Bank & Services of Plant City Inc$55,00020%
Homosassa Civic Club Inc$42,450310%
New Creation Outreach Inc$40,00058%
Feeding America Tampa Bay Inc$39,50040%
Metropolitan Ministries Inc$36,50040%
Operation Heart Felt Foundation$35,000213%
One Community Now Inc$30,00022%
Ignite Academy Inc$29,50022%
John B Gorrie Foundation Inc$28,75026%
Wake Forest University$28,50050%
Fellowship of Christian Athletes$28,00050%
Starting Right Now$26,60030%
Hope Villages of America Inc$22,50010%
Junior Achievement of Tampa Bay Inc$20,00020%
Portico Housing Solutions Inc$20,0001n/a
Aerospace Center for Excellence Inc$19,00040%
St Joseph's Hospital Inc$18,00020%
SPECIAL OLYMPICS FLORIDA Inc$14,00050%
Tampa Bay Watch Inc$14,00040%
Berkeley Preparatory School Inc$13,5004n/a
Children's Cancer Center Inc$13,50050%
Tampa Bay Wave Inc$13,00050%
Sun 'N Fun Fly-In Inc$13,00050%
Big Brothers Big Sisters of Tampa Bay Inc$12,89040%
Elk River Helping Hands$12,5001n/a
Emerald M Therapeutic Riding Center Inc$12,00051%
Suncoast Animal League Inc$11,50021%
Gold Shield Foundation Inc$11,30038%
Southern Appalachian Highlands Conservancy$10,00010%
A Kid's Place of Tampa Bay Inc$10,00030%
Children's Health Defense$10,00020%
Gracepoint Foundation Inc$8,50022%
The Angelus Inc$8,50020%
Appalachian Regional Healthcare Foundation Inc$8,50030%
Catpassionate Village$8,3002n/a
ASTHMA WARRIORS Inc$8,0002n/a
Lowry Park Zoological Society of Tampa Inc$8,00020%
Homosassa River Restoration Project Inc$6,00020%
Eaa Aviation Foundation Inc$5,87550%
Earthjustice$5,00010%
Habitat for Humanity of Citrus County Inc$5,00010%
Oceana Inc$5,00010%
Action Against Hunger - USA$5,0001n/a
American National Red Cross & Its Constituent Chapters and Branches$5,00010%
Lynn Sowers Memorial Foundation Inc$5,00011%
Yankeetown Womans Club Inc$5,00015%
Hillsborough Fire Museum Foundation$4,62541%
Stephen Siller Tunnel to Towers Foundation$4,50020%
Save Crystal River Inc$4,00020%
Simon Youth Foundation Inc$4,00030%
Saving Sight and Sound Inc$4,000210%
Pepin Academies Foundation Inc$4,00012%
Mary Lees House Inc$3,50010%
The Aopa Foundation Inc$3,50040%
Alzheimer's Disease & Related Disorders Association Inc$3,00020%
Hillsborough County Neighborhood Watch Association Inc$2,9861n/a
We Care Food Pantry Inc$2,50011%
Linville Volunteer Fire Department Inc$2,50011%
Bounty & Soul$2,5001n/a
Hero To A Child Inc$2,5001n/a
Gigis Playhouse Inc$2,5001n/a
Kids and Canines Inc$2,50040%
No Fret Guitar Camp$2,5002n/a
Project Dynamo Inc$2,50010%
The Refuge Ranch Inc$2,50011%
Friends of the County Parks & Recreation Inc$2,50012%
Finn's Fighters Inc$2,40020%
North Florida Pga Foundation Inc$2,0001n/a
Hemophilia Foundation of Greater Florida Inc$2,00020%
Hyde Park United Methodist Church$2,0002n/a
Tampa Lighthouse for the Blind Inc$2,00020%
Warriors & Quiet Waters Foundation Inc$2,00010%
Lees-McRae College Inc$2,00010%
The High Country Charitable Foundation$1,7501n/a
Historic Monkey Island Inc$1,75024%
Friends of Joshua House Foundation$1,50020%
American Cancer Society Inc$1,35030%
Man Up and Go$1,20010%
Avery County Habitat for Humanity$1,0001n/a
Chassahowitzka Civic Association Inc$1,0001n/a
High Country United Way$1,00010%
Pasco-Hernando State College Foundation Inc$1,0001n/a
Mind Over Matter Inc$1,0001n/a
The Chiselers Inc$1,00010%
Construction for Worldwide Evangelism Inc A/K/A Cwe Missions$1,00010%
The Arc Tampa Bay Foundation Inc$1,00010%
Redlands Christian Migrant Association Inc$50010%
Wounded Warrior Project Inc$50010%
Meals on Wheels of Tampa Inc$50010%
North Pinellas Firefighters Charities Inc$5001n/a
Pasco County Fair Association Inc$50010%
Annes Kids Inc$5001n/a
Avery County Humane Society Inc$50010%
The Florida Aquarium Inc$50010%
Holiday Charity Ball Inc$3501n/a
Children's Hope Alliance Foundation$2501n/a
Autism Speaks Inc$25010%
Wild Florida Sanctury Inc$2501n/a
The Junior League of Tampa Inc$25010%
Coastal Conservation Association$25010%
CaringBridge$20010%

What it could do for these grantees

Plus 38 recipients with no EIN on record ($984k), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget Mary & Bob Sierra Family Foundation Inc supplied at peak.

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 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 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 budgetAmerican National Red Cross & Its Constituent Chapters and Branches: $5,000 over 1y, 0.0% of budgetLynn Sowers Memorial Foundation Inc: $5,000 over 1y, 0.7% of budget

Tap a dot to name the grantee.

How this is measured
Share of budget is the funder’s grant in a year over the grantee’s total revenue that year, at its highest across the years we hold; revenue is from all sources. Only grantees confirmed against their own filings, whose grants do not exceed their revenue, are plotted: the largest 87.

Nonprofits that may fit its grantmaking

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 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.

Compare Mary & Bob Sierra Family Foundation Inc with peer funders

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.

About Mary & Bob Sierra Family Foundation Inc

How much does Mary & Bob Sierra Family Foundation Inc give?
Mary & Bob Sierra Family Foundation Inc reported 78 grants totaling $1,445,339 in its FY2025 IRS filing. It funded between 54 and 76 organizations a year over FY2021 to FY2024.
What does Mary & Bob Sierra Family Foundation Inc fund?
By grant dollars over FY2021 to FY2025, its largest causes are Education (53%), Human Services (18%), Health (11%).
Who are Mary & Bob Sierra Family Foundation Inc's largest grantees?
By total granted over FY2021 to FY2025: Pasco Education Foundation Inc ($909k), St Joseph's Hospital of Tampa Foundation Inc ($326k), Tampa Metropolitan Area Young Men's Christian Association Inc ($320k).
Does Mary & Bob Sierra Family Foundation Inc fund new organizations?
In FY2024, 37% of the organizations it funded were first-time grantees.
Does Mary & Bob Sierra Family Foundation Inc accept unsolicited applications?
Its most recent filing reports that it accepts unsolicited grant applications.
Which funders back the same organizations as Mary & Bob Sierra Family Foundation Inc?
Its strongest co-funders, measured against what their size predicts, include Community Foundation of Tampa Bay Inc, Debartolo Family Foundation Inc, Vinik Family Foundation.
Where is Mary & Bob Sierra Family Foundation Inc based?
Mary & Bob Sierra Family Foundation Inc is based in FL.

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

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