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California · Private foundation

John & Diane Prewitt Family Foundation

Its FY2024 filing reports that it accepted unsolicited grant applications.

$58k
Granted FY2024(still arriving)
19
Grants FY2024
15
Organizations funded FY2023
7%
First-time grantees FY2023
Read the full brief
Median grant, FY2024
$1,000
Largest grant, FY2024
$40,000
Organizations funded a year
15 to 34
FY2017 to FY2023
States reached, FY2024
8
Total assets, FY2024
$1.1M
Applications
Takes unsolicited applications
Per its most recent filing; check its own site

How open it is to new grantees

In FY2023, 7% of the organizations John & Diane Prewitt Family Foundation funded were first-time grantees, receiving 1% of its grant dollars.

New vs renewed · share of each year

In FY2023, 99% of grant dollars renewed an existing relationship; $1000 went to new ones.

50%100%’18’19’20’21’22’23
RenewedFirst-time

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

’18’19’20’21’22’23
Human ServicesHealthEducationAnimalsFood & 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.
The numbers by year
Fiscal yearOrganizations fundedTo those organizationsFirst-time grantees
FY2024still arriving19$58k37%
FY202315$103k7%
FY202234$184k15%
FY202130$182k27%
FY202020$179k25%
FY201926$229k8%
FY201824$263k8%
FY201722$223kn/a
89% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2024.

Human Services$731kHealth$538kEducation$28kFood & Nutrition$25kAnimals$22kPhilanthropy$15kInternational$13kPublic Safety & Disaster$9kOther$0

Where its grants go

Grant dollars by states, across the years we hold.

Which US states its grants reach

MT
IL
NY
IA
CA
MD
AZ
KS
TN
NC
DC
TX

Top grantees

Largest recipients by total granted, FY2017 to FY2024, and the share of each one’s budget the grants supplied at peak.

Show all 29 grantees

What it could do for these grantees

Plus 23 recipients with no EIN on record ($566k), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget John & Diane Prewitt Family Foundation supplied at peak.

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetHart Community Homes Inc: $722,000 over 7y, 7.6% of budgetScripps Health: $16,000 over 6y, 0.0% of budgetMercy Ships International: $8,000 over 8y, 0.0% of budgetPEO Foundation: $8,000 over 8y, 0.0% of budgetSt Jude Children's Research Hospital Inc: $8,000 over 8y, 0.0% of budgetPat Tillman Foundation: $8,000 over 8y, 0.0% of budgetSanta Rosa Plateau Foundation: $8,000 over 8y, 1.0% of budgetBig Bear Ski Educational Foundation: $7,000 over 7y, 0.5% of budgetUniversity of Redlands: $7,000 over 7y, 0.0% of budgetCanine Companions for Independence Inc: $6,000 over 6y, 0.0% of budgetFriends of the Sea Lions Inc Dba Pacific Marine Mammal Center: $6,000 over 6y, 0.1% of budgetAmerican National Red Cross & Its Constituent Chapters and Branches: $6,000 over 4y, 0.0% of budgetBreakthrough T1d: $5,000 over 5y, 0.0% of budgetOcean Institute: $5,000 over 5y, 0.0% of budgetInternational Fellowship of Christians & Jews Inc: $4,000 over 4y, 0.0% of budgetWounded Warrior Project Inc: $4,000 over 4y, 0.0% of budgetSt Mary's Food Bank Alliance: $3,000 over 3y, 0.0% of budgetMichelles Place Cancer Resource Center: $3,000 over 3y, 0.2% of budgetTexas A&M Foundation: $3,000 over 3y, 0.0% of budgetZoological Society of San Diego: $3,000 over 3y, 0.0% of budgetArizona State University Foundation for a New American University: $2,000 over 2y, 0.0% of budgetThe Dolphin Foundation: $2,000 over 2y, 0.2% of budgetThe Arizona Animal Welfare League: $2,000 over 2y, 0.0% of budgetGivsum Foundation: $1,000 over 1y, 0.1% of budgetPalomar Health Foundation: $1,000 over 1y, 0.0% of budgetSamaritan's Purse: $1,000 over 1y, 0.0% of budgetNighthawk Marching Band Boosters: $1,000 over 1y, 0.8% 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 27.

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.

Silicon Valley Community FoundationCA11.4× affinity4 shared granteesties to 6 of 6Hover any node to trace its alignments.Compare side by side →

Open a dossier: Silicon Valley Community Foundation · National Philanthropic Trust · The Bank of America Charitable Foundation Inc · American Online Giving Foundation Inc · Donor Advised Charitable Giving Inc · Fidelity Investments Charitable Gift Fund · Amazonsmile Foundation

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 John & Diane Prewitt Family Foundation with peer funders

Warm introductions · Powered by PlinthPlus

How do I get to John & Diane Prewitt Family Foundation?

Find your warmest path to John & Diane Prewitt 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.

About John & Diane Prewitt Family Foundation

How much does John & Diane Prewitt Family Foundation give?
John & Diane Prewitt Family Foundation reported 19 grants totaling $58,000 in its FY2024 IRS filing. It funded between 15 and 34 organizations a year over FY2017 to FY2023.
What does John & Diane Prewitt Family Foundation fund?
By grant dollars over FY2017 to FY2024, its largest causes are Human Services (51%), Health (38%), Education (2%).
Who are John & Diane Prewitt Family Foundation's largest grantees?
By total granted over FY2017 to FY2024: Hart Community Homes Inc ($722k), Scripps Health ($16k), Mercy Ships International ($8k).
Does John & Diane Prewitt Family Foundation fund new organizations?
In FY2023, 7% of the organizations it funded were first-time grantees.
Does John & Diane Prewitt Family Foundation accept unsolicited applications?
Its most recent filing reports that it accepts unsolicited grant applications.
Which funders back the same organizations as John & Diane Prewitt Family Foundation?
Its strongest co-funders, measured against what their size predicts, include Silicon Valley Community Foundation, National Philanthropic Trust, The Bank of America Charitable Foundation Inc.
Where is John & Diane Prewitt Family Foundation based?
John & Diane Prewitt Family Foundation is based in CA.

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 53 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 2024, released 2024. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

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