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Wissner-Slivka Foundation at a glance

· Private foundation

Wissner-Slivka 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.

$1k
Granted FY2025still arriving
1
Grants FY2025still arriving
1
States reached
$1k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
01100% classified

What it funded, over time

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

Health$1.4MEducation$350kHuman Services$147kYouth Development$75kArts & Culture$10kFood & Nutrition$5kEnvironment$500
02FY2025 · 1 grant

Where the money goes

Grants by size, and the largest recipients.

$1,000
Median grant
1
States reached
$1.6M
Total assets
Largest grants
RecipientAmount
KINDERING CENTER$1,000
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:

Dollar for dollar, its grants (FY17–25) land where the poverty rate runs at 9%, against an area that typically sits at 9%. 5% of its dollars go to grantees based in above-average-need neighborhoods. Its grants skew toward lower-need ZIPs.

area typical 9%PEACE FIRST INC: $25k → 16%CHILD MIND INSTITUTE: $5k → 17%JACQUES PEPIN FOUNDATION: $5k → 7%KINDERING CENTER: $31k → 9%PEACE FIRST INC: $25k → 16%KINDERING CENTER: $30k → 9%PEACE FIRST: $25k → 16%KINDERING CENTER: $25k → 9%KINDERING CENTER: $25k → 9%KINDERING CENTER: $20k → 9%KINDERING CENTER: $11k → 9%KINDERING CENTER: $2k → 9%KINDERING CENTER: $1k → 9%KINDERING CENTER: $1k → 9%KINDERING CENTER: $1k → 9%OVERLAKE HOSPITAL FOUNDATION: $250k → 9%OVERLAKE HOSPITAL FOUNDATION: $235k → 9%OVERLAKE HOSPITAL FOUNDATION: $105k → 9%OVERLAKE HOSPITAL FOUNDATION: $102k → 9%OVERLAKE HOSPITAL FOUNDATION: $37k → 9%OVERLAKE HOSPITAL FOUNDATION: $30k → 9%OVERLAKE HOSPITAL FOUNDATION: $15k → 9%KIDSQUEST CHILDREN MUSEUM: $10k → 9%OVERLAKE HOSPITAL FOUNDATION: $10k → 9%OVERLAKE HOSPITAL FOUNDATION: $5k → 9%BELLEVUE BOTANICAL GARDEN SOCIETY: $500 → 9%UNIVERSITY OF WASHINGTON: $150k → 9%UNIVERSITY OF WASHINGTON: $100k → 9%UNIVERSITY OF WASHINGTON: $100k → 9%FRED HUTCHINSON CANCER RESEARCH INSTITUTE: $200k → 9%FRED HUTCHINSON CANCER RESEARCH INSTITUTE: $100k → 9%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.

99%of every dollar goes to organizations it has funded before.
$2.0M · 6 repeat orgs$21k to everyone else

6 repeat relationships: 1 still active in FY2025, 5 since wound down.

How the two cohorts compare

Re-uppedFunded once

Organizations

6
4

Total granted

$2.0M
$21k

Median revenue growth · since first grant

+60%
+180%

Still filing today

67%
100%

New vs renewed · share of each year

In FY2025, 100% of grant dollars renewed an existing relationship; $0 went to new ones.

50%100%’17’18’19’20’21’22’23’24’25
RenewedFirst-time

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

’17’18’19’20’21’22’23’24’25
HealthEnvironmentYouth DevelopmentArts & CultureEmploymentOther
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

  • OH
    OVERLAKE HOSPITAL FOUNDATION
    7× · 2018–2024 · $790k · revenue +89%
  • SC
    Seattle Children's Foundation
    3× · 2021–2024 · $300k · revenue +60%
  • FH
    FRED HUTCHINSON CANCER RESEARCH CENTER
    2× · 2017–2019 · $300k · revenue +27%

Funded once

  • KC
    KIDSQUEST CHILDREN'S MUSEUMgraduated
    one grant, 2020 · $10k · revenue +180%
  • JP
    JACQUES PEPIN FOUNDATION THEgraduated
    one grant, 2022 · $5k · revenue +26%
  • CM
    CHILD MIND INSTITUTE INCgraduated
    one grant, 2017 · $5k · revenue +409%
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
Seattle Children's Guild Association

Seattle children's guild association advocates for seattle children's hospital through volunteer, philanthropic and community endeavors to ensure hope, excellent care and advanced cures for children.

—
2
Seattle Children's Hospital

Seattle children's hospital (seattle children's) will be an innovative leader in pediatric health and wellness through our unsurpassed quality, clinical care, relentless spirit of inquiry, and compassion for all children and their…

Health
3
The Association of Chrmc and University Physicians

Children's university medical group (cumg) is the non-profit pediatric group practice established to support the academic, research and clinical missions of its corporate members, university of washington school of medicine (uwsom) and…

Health
4
Seattle Children's Healthcare System

Seattle children's healthcare system (schs) is engaged in activities relating to the provision of health care services to infants, children, and adolescents, delivering and improving the delivery and the quality of those services through…

Health
5
Seattle Biomedical Research Institute

We conduct fundamental infectious disease research to generate critical new knowledge about pathogens and their interactions with see schedule o for continuationhumans to enable the discovery and development of novel interventions,…

—
6
Childrens Museum of Southern Minnesota

Ignite the natural curiousity of every child through the power of play in a dynamic, awe-inspiring environment.

Arts & Culture
7
Pacific Science Center Foundation

Pacific science center (pacsci) ignites curiosity in every child and fuels a passion for discovery, experimentation, and critical thinking in all of us.

Arts & Culture
8
The Children's Hospital of Philadelphia

The children's hospital of philadelphia, the oldest hospital in the united states dedicated exclusively to pediatrics, strives to be the world leader in the advancement of health care for children by integrating excellent patient care,…

Health
9
Kqed Inc

See schedule okqed serves the people of northern california with a community-supported alternative to commercial media, providing the knowledge needed to make informed decisions; convening community dialogue; bringing the arts to everyone;…

Arts & Culture
10
Stony Brook Childrens Services University Faculty Practice Corporation

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
11
Children's Hospital Corporation

Provider of pediatric healthcare, education, research & community service

Health
12
The Childrens Museum

Boston children's museum engages children and families in joyful discovery experiences that instill an appreciation of our world, develop foundational skills, and spark a lifelong love of learning. boston children's museum is a welcoming,…

Arts & Culture
How this is measured
The grantee most central to the portfolio’s shape is Seattle Children's Foundation; the most unlike its peers is Bellevue Botanical Garden Society. 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 10 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)
2
Early backer (in before they grew)
8/9
Grantees still filing
8/9
Grew since first funded

Where the money sits, by cause and then by grantee

UNIVERSITY OF WASHINGTON: $350,000 · OtherUNIVERSITY OF WASHINGTONSeattle Children's Foundation: $300,000 · OtherSeattle Children's FoundationFRED HUTCHINSON CANCER RESEARCH CENTER: $300,000 · OtherFRED HUTCHINSON CANCER RESEARCH CENTERKINDERING CENTER: $147,000 · OtherKINDERING CENTEROVERLAKE HOSPITAL FOUNDATION: $790,000 · HealthOVERLAKE HOSPITAL FOUNDATION+1 more: $5,000 · HealthPEACE FIRST INC: $75,000 · Youth DevelopmentKIDSQUEST CHILDREN'S MUSEUM: $10,000 · Arts & CultureJACQUES PEPIN FOUNDATION THE: $5,000 · EmploymentBELLEVUE BOTANICAL GARDEN SOCIETY: $500 · Environment
Other$1,097,000Health$795,000Youth Development$75,000Arts & Culture$10,000Employment$5,000Environment$500

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

25%50%75%100%$10M$100Mgrantee revenue →↑ funder's share of their budgetOVERLAKE HOSPITAL FOUNDATION: $790,000 over 7y, 1.8% of budgetSeattle Children's Foundation: $300,000 over 3y, 0.1% of budgetFRED HUTCHINSON CANCER RESEARCH CENTER: $300,000 over 2y, 0.0% of budgetKINDERING CENTER: $147,000 over 9y, 0.1% of budgetPEACE FIRST INC: $75,000 over 3y, 1.8% of budgetKIDSQUEST CHILDREN'S MUSEUM: $10,000 over 1y, 0.7% of budgetJACQUES PEPIN FOUNDATION THE: $5,000 over 1y, 0.4% of budgetCHILD MIND INSTITUTE INC: $5,000 over 1y, 0.0% of budgetBELLEVUE BOTANICAL GARDEN SOCIETY: $500 over 1y, 0.1% 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.

Puget Sound Energy Fo…Vanguard Charitable E…Morgan Stanley Global…American Online Givin…The Bank of America C…Donor Advised Charita…Fidelity Investments …Amazonsmile Foundation
Puget Sound Energy FoundationDE13.5× affinity4 shared granteesties to 7 of 7Hover any node to trace its alignments.Compare side by side →

Open a dossier: Puget Sound Energy Foundation · Vanguard Charitable Endowment Program · Morgan Stanley Global Impact Funding Trust Inc · American Online Giving Foundation Inc · The Bank of America Charitable 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 Wissner-Slivka Foundation funds: left to right is the share of its income from government, bottom to top the share from Wissner-Slivka Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 10%0%1%3%5%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →
    no gov moneyreceives it· size = income
    1get no government money at all
    1report government grants on their 990 we could not trace to a source (not plotted)
    0rely 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.

    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 10 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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    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