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· Private foundation

Peter E Sills Family Foundation

Its FY2025 filing reports that it accepted unsolicited grant applications.

$110k
Granted FY2025still arriving
12
Grants FY2025still arriving
1
States reached
$30k
Largest
01What it funds
0198% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2025.

Youth Development$250kHealth$75kEducation$48kHousing & Shelter$16kRecreation & Sports$5kOther$0
02FY2025 · 12 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k6 grants · $30k
  • $10k–50k6 grants · $80k
$10,000
Median grant
1
States reached
$692k
Total assets
Largest grants
RecipientAmount
BOYS AND GIRLS CLUB OF TRACY$30,000
PAINTED TURTLE$10,000
SCHOOLS MENTORING & RESOURCE TEAM$10,000
NORTHERN CA JEWISH SPORTS HALL$10,000
Individual grant recipient$10,000
49ER FOUNDATION$10,000
OLYMPIC CLUB FOUNDATION$5,000
GPII FOUNDATION$5,000
FAMILY HOUSE INC$5,000
KIK FOUNDATION KENTFIELD SCHOOLS$5,000
GEORGE MARK CHILDRENS FUND$5,000
DEDICATION TO SPECIAL EDUCATION$5,000
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 (FY17–21, $16k) land where the poverty rate runs at 10%, against an area that typically sits at 10%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 10%AT THE CROSSROADS: $5k → 10%AT THE CROSSROADS: $3k → 10%AT THE CROSSROADS: $8k → 10%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.
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.

88%of every dollar goes to organizations it has funded before.
$339k · 8 repeat orgs$45k to everyone else

8 repeat relationships: 7 still active in FY2025, 1 since wound down; 5 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

8
3

Total granted

$339k
$15k

Still filing today

75%
0%

New vs renewed · share of each year

In FY2025, 73% of grant dollars renewed an existing relationship; $30k went to new ones.

50%100%’17’19’20’21’22’23’24’25
RenewedFirst-time

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

’17’19’20’21’22’23’24’25
Youth DevelopmentHealthEducationHuman ServicesReligionOther
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

  • BA
    BOYS AND GIRLS CLUB OF TRACY
    7× · 2019–2025 · $141k · revenue +378%
  • GM
    George Mark Childrens Fund
    6× · 2017–2025 · $36k · revenue +88%
  • FH
    FAMILY HOUSE INC
    7× · 2017–2025 · $31k · revenue +656%

Funded once

  • SM
    SCHOOLS MENTORING RESOURCES TEAM
    one grant, 2021 · $8k
  • IG
    Individual grant recipient
    one grant, 2021 · $4k
  • FT
    FOR THE LOVE
    one grant, 2023 · $3k
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
Boys and Girls Club of Santa Monica Inc

To inspire and enable all young people, especially those who need us most, to reach their full potential as caring, responsible, productive citizens.

Youth Development
2
Mark Day School

Innovative and full of heart, mark day school nurtures each child to pursue their curiosity, think critically, embrace challenge with courage and joy, and work in partnership with others to build more caring and inclusive communities.

—
3
The San Francisco School

A private school that cultivates and celebrates the intellectual, imaginative, and humanitarian promise of each student in a community that practices mutual respect, embraces diversity, and inspires passion for learning.

—
4
Golden Gate University

Golden gate university prepares individuals to lead and serve by providing high quality, practice-based educational programs in law, taxation, business and related professions - as a nonprofit institution - in an innovative and challenging…

Education
5
Santa Catalina School

Santa catalina school exists to develop in each student a striving for excellence, a maturing awareness of moral and spiritual values, a sense of responsible purpose, and a determination to serve the world with courage, grace, and…

Education
6
Massachusetts Institute of Technology

The mission of mit is to advance knowledge and educate students in science, technology, and other areas of scholarship that will best serve the nation and the world in the 21st century.

Education
7
Children's Hospital & Research Center At Oakland

The mission of children's hospital & research center at oakland is to protect and advance the health and well-being of children through clinical care, teaching and research.

Health
8
Friends of the Children - San Francisco Bay Area

Impacting generational change by empowering youth who are facing the greatest obstacles through relationships with professional mentors - 12+ years, no matter what.

Education
9
The International School of San Francisco

Guided by the principles of academic rigor and diversity, the international school of san francisco offers programs of study in french and english to prepare its graduates for a world in which the ability to think critically and to…

Education
10
Children's Hospital Corporation

Provider of pediatric healthcare, education, research & community service

Health
11
Pacific University

A diverse and sustainable learning community dedicated to discovery and excellence in teaching, scholarship and practice, pacific university inspires students to think, care, create and pursue justice in our world.

Education
12
Presidio Hill School

Presidio hill school is a co-ed k-8 independent, progressive school. learning is collaborative and an active experience with an emphasis on inquiry. students are engaged in their own learning and guided by an expert faculty through a…

Education
How this is measured
The grantee most central to the portfolio’s shape is Schools Mentoring and Resources Team Inc (Smart); the most unlike its peers is The Board of Trustees of the Leland Stanford Junior University. 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

9 grantees tracked through their own filings, 2017–2025.

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 2025, not grant rows in a single year, so this will not match the grant count on the cover. 9 of the 17 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)
4
Early backer (in before they grew)
9/9
Grantees still filing
6/9
Grew since first funded

Where the money sits, by cause and then by grantee

BOYS AND GIRLS CLUB OF TRACY: $141,400 · Youth DevelopmentBOYS AND GIRLS CLUB OF TRACYTHE PAINTED TURTLE: $35,500 · Youth DevelopmentTHE PAINTED TURTLEIndividual grant recipient: $28,000 · OtherIndividual grant recipie…49ER FOUNDATION: $25,000 · Other49ER FOUNDATIONNORTHERN CA JEWISH SPORTS HALL: $10,000 · OtherNORTHERN CA JEWISH SPORT…SCHOOLS MENTORING RESOURCES TEAM: $8,000 · OtherSCHOOLS MENTORING RESOUR…DEDICATION TO SPECIAL EDUCATION: $5,000 · OtherDEDICATION TO SPECIAL ED…KIK FOUNDATION KENTFIELD SCHOOLS: $5,000 · OtherKIK FOUNDATION KENTFIELD…Individual grant recipient: $4,000 · Other+1 more: $2,500 · OtherGeorge Mark Childrens Fund: $35,500 · HealthGeorge Mark Childr…FAMILY HOUSE INC: $30,500 · HealthFAMILY HOUSE INCSCHOOLS MENTORING AND RESOURCES TEAM INC (SMART): $27,500 · EducationSCHOOLS MENTO…THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY: $15,000 · EducationTHE BOARD OF …GPII FOUNDATION CORPORATION: $5,000 · EducationGPII FOUNDATI…AT THE CROSSROADS: $15,500 · Human ServicesOLYMPIC CLUB FOUNDATION: $5,000 · Religion
Youth Development$176,900Other$87,500Health$66,000Education$47,500Human Services$15,500Religion$5,000

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

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetBOYS AND GIRLS CLUB OF TRACY: $141,400 over 7y, 0.9% of budgetGeorge Mark Childrens Fund: $35,500 over 6y, 0.1% of budgetTHE PAINTED TURTLE: $35,500 over 6y, 0.1% of budgetFAMILY HOUSE INC: $30,500 over 7y, 0.1% of budgetSCHOOLS MENTORING AND RESOURCES TEAM INC (SMART): $27,500 over 5y, 0.4% of budgetAT THE CROSSROADS: $15,500 over 3y, 0.5% of budgetTHE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY: $15,000 over 2y, 0.0% of budgetGPII FOUNDATION CORPORATION: $5,000 over 1y, 3.9% 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.

  • Who funds BOYS AND GIRLS CLUB OF TRACY ↗
  • Who funds George Mark Childrens Fund ↗
  • Who funds THE PAINTED TURTLE ↗
  • Who funds FAMILY HOUSE INC ↗
  • Who funds SCHOOLS MENTORING AND RESOURCES TEAM INC (SMART) ↗
  • Who funds AT THE CROSSROADS ↗
  • Who funds THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY ↗
  • Who funds OLYMPIC CLUB FOUNDATION ↗
  • Who funds GPII FOUNDATION CORPORATION ↗

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.

American Online Giving Foundation IncDE7.8× affinity4 shared granteesties to 3 of 3Hover any node to trace its alignments.Compare side by side →

Open a dossier: 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.

How much its grantees rely on government

Each dot is one organization Peter E Sills Family Foundation funds: left to right is the share of its income from government, bottom to top the share from Peter E Sills Family Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 00%0%1%3%5%funder's share of their income ↑0%5%10%15%20%share of the org’s income from government →
    no gov moneyreceives it· size = income
    0get no government money at all
    3report government grants on their 990 we could not trace to a source (not plotted)
    0rely on government for over half their income
    ⤢ axis zoomed · 0–20%
    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 Peter E Sills Family Foundation?

    Find your warmest path to Peter E Sills 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.

    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 17 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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