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California · Private foundation

The Michael and Paula Rantz Foundation

Its FY2025 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$1.1M
Granted FY2024(still arriving)
44
Itemized grants FY2024
31
Organizations funded FY2023
39%
First-time grantees FY2023
Read the full brief
Itemized, FY2024
$913k
The rest is grants the schedule does not break out
Median grant, FY2024
$10,000
Largest grant, FY2024
$150,000
Organizations funded a year
15 to 31
FY2020 to FY2023
States reached, FY2024
9
Total assets, FY2024
$6.9M
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2023, 39% of the organizations The Michael and Paula Rantz Foundation funded were first-time grantees, receiving 27% of its grant dollars.

New vs renewed · share of each year

In FY2023, 73% of grant dollars renewed an existing relationship; $265k went to new ones.

50%100%’21’22’23
RenewedFirst-time

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

’21’22’23
HealthEnvironmentEducationArts & CultureCivil RightsRecreation & SportsOther
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 arriving32$913k44%
FY202331$971k39%
FY202222$599k36%
FY202115$520k60%
FY202020$557kn/a
89% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2020 to 2025.

Education$2.0MHuman Services$263kArts & Culture$256kEnvironment$242kHealth$215kPublic Benefit$75kReligion$70kPhilanthropy$38kOther$0

Top grantees

Largest recipients by total granted, FY2020 to FY2024, and the share of each one’s budget the grants supplied at peak.

GranteeTotal grantedYearsShare of their budget
Menlo School$330,00050%
Cornell University$310,00020%
Castilleja School Foundation$241,00040%
Avenidas$230,00051%
Volcan Mountain Foundation$135,00024%
College Track$125,00010%
University of Chicago$125,00050%
San Francisco Museum of Modern Art$106,30030%
Kipp Bay Area Schools$100,00030%
Child Mind Institute Inc$75,00020%
Show all 41 grantees
All grantees of The Michael and Paula Rantz Foundation by total granted
GranteeTotal grantedYearsShare of their budget
Menlo School$330,00050%
Cornell University$310,00020%
Castilleja School Foundation$241,00040%
Avenidas$230,00051%
Volcan Mountain Foundation$135,00024%
College Track$125,00010%
University of Chicago$125,00050%
San Francisco Museum of Modern Art$106,30030%
Kipp Bay Area Schools$100,00030%
Child Mind Institute Inc$75,00020%
San Mateo County Historical Association$70,00051%
Verified Voting Foundation$65,00041%
Pepperwood Foundation$60,00021%
Fordham University$50,05010%
Pbs Foundation$50,00010%
San Dieguito River Valley Land Conservancy$48,25034%
Embarcadero Media Foundation$25,00010%
Sierra Club Foundation$25,00010%
Amyotrophic Lateral Sclerosis Assn$25,00010%
The Girls' Middle School$25,00010%
Steadman Philippon Research Institute$25,00010%
Cancer Research and Treatment Fund Inc$25,00012%
Planned Parenthood Mar Monte Inc$20,00040%
CalMatters$20,00020%
Colorectal Cancer Alliance$15,00030%
Planned Parenthood Federation of America Inc$15,00010%
East Palo Alto Tennis & Tutoring$11,00020%
Florida International University Foundation Inc$10,00010%
Sigma Education Foundation$10,0001n/a
Sigma Pi Educational Foundation Inc$10,00011%
The Peninsula Bridge Program$10,00010%
Children's Health Council Inc$10,00010%
Robin Hood Foundation$7,50010%
42nd Street Moon$5,00010%
The Fit Kids Foundation Inc$5,00011%
Pro Publica Inc$5,00010%
American Foundation for Suicide Prevention$5,00010%
Elizabeth F Gamble Garden$5,00040%
Tragedy Assistance Program for Survivors Inc$5,00010%
Fairvote Washington Foundation$5,00011%
Kipp NYC Public Charter Schools$2,50010%

What it could do for these grantees

Plus 22 recipients with no EIN on record ($1.1M), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget The Michael and Paula Rantz Foundation supplied at peak.

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetMenlo School: $330,000 over 5y, 0.2% of budgetCornell University: $310,000 over 2y, 0.0% of budgetCastilleja School Foundation: $241,000 over 4y, 0.3% of budgetAvenidas: $230,000 over 5y, 0.9% of budgetVolcan Mountain Foundation: $135,000 over 2y, 3.7% of budgetCollege Track: $125,000 over 1y, 0.2% of budgetUniversity of Chicago: $125,000 over 5y, 0.0% of budgetSan Francisco Museum of Modern Art: $106,300 over 3y, 0.1% of budgetKipp Bay Area Schools: $100,000 over 3y, 0.0% of budgetChild Mind Institute Inc: $75,000 over 2y, 0.1% of budgetSan Mateo County Historical Association: $70,000 over 5y, 0.9% of budgetVerified Voting Foundation: $65,000 over 4y, 1.2% of budgetPepperwood Foundation: $60,000 over 2y, 1.2% of budgetFordham University: $50,050 over 1y, 0.0% of budgetPbs Foundation: $50,000 over 1y, 0.2% of budgetSan Dieguito River Valley Land Conservancy: $48,250 over 3y, 3.9% of budgetEmbarcadero Media Foundation: $25,000 over 1y, 0.3% of budgetSierra Club Foundation: $25,000 over 1y, 0.0% of budgetAmyotrophic Lateral Sclerosis Assn: $25,000 over 1y, 0.0% of budgetThe Girls' Middle School: $25,000 over 1y, 0.3% of budgetSteadman Philippon Research Institute: $25,000 over 1y, 0.2% of budgetCancer Research and Treatment Fund Inc: $25,000 over 1y, 2.4% of budgetPlanned Parenthood Mar Monte Inc: $20,000 over 4y, 0.0% of budgetCalMatters: $20,000 over 2y, 0.1% of budgetColorectal Cancer Alliance: $15,000 over 3y, 0.0% of budgetPlanned Parenthood Federation of America Inc: $15,000 over 1y, 0.0% of budgetEast Palo Alto Tennis & Tutoring: $11,000 over 2y, 0.3% of budgetFlorida International University Foundation Inc: $10,000 over 1y, 0.0% of budgetSigma Pi Educational Foundation Inc: $10,000 over 1y, 0.9% of budgetThe Peninsula Bridge Program: $10,000 over 1y, 0.2% of budgetChildren's Health Council Inc: $10,000 over 1y, 0.0% of budgetRobin Hood Foundation: $7,500 over 1y, 0.0% of budget42nd Street Moon: $5,000 over 1y, 0.5% of budgetThe Fit Kids Foundation Inc: $5,000 over 1y, 0.8% of budgetPro Publica Inc: $5,000 over 1y, 0.0% of budgetAmerican Foundation for Suicide Prevention: $5,000 over 1y, 0.0% of budgetElizabeth F Gamble Garden: $5,000 over 4y, 0.1% of budgetTragedy Assistance Program for Survivors Inc: $5,000 over 1y, 0.0% of budgetFairvote Washington Foundation: $5,000 over 1y, 1.2% of budgetKipp NYC Public Charter Schools: $2,500 over 1y, 0.0% 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 40.

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 FoundationCA20.8× affinity11 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Silicon Valley Community Foundation · Jewish Community Federation of San Francisco the Peninsula Marin & Sonoma · Marin Community Foundation · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · The Bisconti Family Foundation · The San Francisco Foundation · Morgan Stanley Global Impact Funding Trust Inc · The William & Flora Hewlett Foundation · The Bessemer Giving Fund · The Ayco Charitable Foundation · Stephen S Smith and Paula K Smith Family Foundation · Tomlinson Family 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 The Michael and Paula Rantz Foundation with peer funders

About The Michael and Paula Rantz Foundation

How much does The Michael and Paula Rantz Foundation give?
The Michael and Paula Rantz Foundation reported 44 itemized grants totaling $913,300, out of $1,113,300 in total grant expense reported on the return in its FY2024 IRS filing. It funded between 15 and 31 organizations a year over FY2020 to FY2023.
What does The Michael and Paula Rantz Foundation fund?
By grant dollars over FY2020 to FY2024, its largest causes are Education (36%), Human Services (5%), Arts & Culture (5%).
Who are The Michael and Paula Rantz Foundation's largest grantees?
By total granted over FY2020 to FY2024: Menlo School ($330k), Cornell University ($310k), Castilleja School Foundation ($241k).
Does The Michael and Paula Rantz Foundation fund new organizations?
In FY2023, 39% of the organizations it funded were first-time grantees.
Does The Michael and Paula Rantz Foundation accept unsolicited applications?
Its most recent filing reports that it funds preselected organizations and does not take unsolicited requests. Check the foundation's own site before ruling it out.
Which funders back the same organizations as The Michael and Paula Rantz Foundation?
Its strongest co-funders, measured against what their size predicts, include Silicon Valley Community Foundation, Jewish Community Federation of San Francisco the Peninsula Marin & Sonoma, Marin Community Foundation.
Where is The Michael and Paula Rantz Foundation based?
The Michael and Paula Rantz 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 64 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.

Possibly out of date. A more recent filing (FY2025) is on record and reports $1.2M of grant expense with no grantee named in the published copy. A private foundation itemizes every grant it makes, so a return carrying none has filed its list as an attachment that the public copy does not include. The figures above are therefore from FY2024, the most recent year this funder’s grantee list reached the public record.

Source object · view filing

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